JP3297635B2 - Collision type air flow pulverizer and method for producing toner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impingement airflow pulverizer for pulverizing a powder material using a jet airflow (high-pressure gas), and a toner for developing an electrostatic charge image using the pulverizer. To a method for producing a toner.

[0002]

2. Description of the Related Art A toner or a colored resin powder for a toner used in an image forming method by an electrophotographic method usually contains at least a binder resin and a colorant or a magnetic powder. The toner develops the electrostatic latent image formed on the latent image carrier to form a toner image, transfers the formed toner image to a recording material such as plain paper or a plastic film, and heat-fixes a pressure roller. The toner image on the recording material is fixed to the recording material by a fixing unit such as a fixing unit or a heat and pressure fixing unit. Therefore, the binder resin used for the toner has a property of being plastically deformed when heat or pressure is applied.

At present, a toner or a colored resin powder for a toner is prepared by melting and kneading a mixture containing at least a binder resin and a colorant or a magnetic powder (containing a third component as necessary). It is prepared by cooling the product, pulverizing the obtained cooled product, and classifying the obtained pulverized product. In the pulverization of the cooled material, coarse pulverization (or medium pulverization) is usually performed by a mechanical impact pulverizer, and then the coarse pulverized material is finely pulverized by a collision type air pulverizer using a jet stream.

[0004] In a collision type air flow pulverizer using a jet air stream, a powder raw material is put on a jet air stream to form a particle mixed air stream.
Injection is performed from the outlet of the accelerating tube, and this particle mixed gas stream is caused to collide with a collision surface of a collision member provided opposite to the outlet of the accelerating tube, and the powder material is pulverized by the impact force.

Conventionally, as such an impingement type air-flow pulverizer, the one shown in FIGS. 16 and 17 has been used (JP-A-57-50554 and JP-A-58-1438).
No. 53).

[0006] In these impingement type air-flow pulverizers, a powdery material having a coarse particle size is introduced from an inlet 22, and the high-pressure gas supplied to the acceleration tube 1 from a high-pressure gas supply nozzle 25 flows through the acceleration tube 1. Is sucked into the inside of the accelerating tube 1 from the powder material supply port 24 communicated in the middle. The sucked powder material is injected into the pulverizing chamber 13 from the outlet 10 of the accelerating tube 1 together with the high-pressure gas, and collides with the collision surface 26 of the collision member 11 provided opposite the outlet 10, and the impact force Crushed by The pulverized material is discharged from the pulverizing chamber 13 through the discharge port 14.

However, as shown in FIG. 16, when the collision surface 26 is perpendicular to the axial direction of the acceleration tube 1, the collision surface 26
As the powder concentration in the vicinity increases, the crushing action is reduced by the impact surface 2
6 is the primary collision and the secondary collision with the crushing chamber side wall 23 is not effectively used, so that the crushing efficiency is low. Further, when the thermoplastic resin is pulverized, a fusion material is easily generated on the collision surface 26 due to local heat generation at the time of collision, and the pulverization ability is reduced, so that stable operation of the apparatus becomes difficult. Therefore, it has been difficult to use the powder at a high concentration supplied to the acceleration tube 1.

In the case where the collision surface 26 is inclined at 45 ° with respect to the axial direction of the accelerating tube 1 as in the collision-type airflow pulverizer shown in FIG. The powder concentration near the collision surface 26 is lower than that of the pulverizer of FIG. However, since the impact force used for the crushing at the time of the collision is small and the secondary collision with the crushing chamber side wall 23 cannot be effectively used, the crushing ability is reduced as shown in FIG.
6, which is reduced to 1/2 to 1 / 1.5 as compared with the pulverizer of No. 6.

A collision-type airflow pulverizer that solves the above-mentioned problems is disclosed in Japanese Patent Application Laid-Open No. 1-254266 and Japanese Utility Model Application Laid-Open No. 1-148.
No. 740.

Japanese Patent Application Laid-Open No. Hei 1-254266 discloses FIG.
As shown in FIG. 5, the collision surface 26 of the collision member 11 has a specific conical shape so that the powder concentration in the vicinity of the collision surface is reduced, and the collision-type air flow is configured to efficiently collide with the side wall 23 of the crushing chamber. A crusher is proposed.

Japanese Utility Model Laid-Open Publication No. 1-148740 discloses FIG.
As shown in the figure, the outer peripheral collision surface 18 of the collision member 11 is arranged at a right angle to the axis of the acceleration tube 1 and the conical projection 17 is provided at the center thereof to prevent the reflected flow at the collision surface. Suggest to do.

According to the impingement type air current pulverizers shown in FIGS. 18 and 19, the above-mentioned problems can be solved, but they are not sufficiently satisfactory.

Japanese Patent Application Laid-Open Nos. Hei 5-309288 and Hei 5-309287 have been proposed as a collision-type airflow pulverizer in which the above-mentioned problems are further improved.

In Japanese Patent Application Laid-Open No. 5-309288, FIG.
As shown in FIG. 0, the object to be ground supplied from the object to be ground supply tube 6 is the object to be ground formed between the inner wall of the accelerating tube throat portion 2 of the accelerating tube 1 and the outer wall of the high-pressure gas supply nozzle 3. It reaches the supply port 5. On the other hand, the high-pressure gas is jetted from the high-pressure gas supply nozzle 3 toward the acceleration tube outlet 10. At this time,
The crushed material is sucked from the crushed material supply port 5 toward the acceleration tube outlet 10 while being accompanied by the gas coexisting therewith, and accelerated while being uniformly mixed with the high-pressure gas in the acceleration tube throat portion 2. The powder collides with the collision surface 26 of the collision member 11 arranged opposite to the pipe outlet 10 in a uniform state without deviation of the powder concentration, and further efficiently secondary collisions with the side wall 23 of the pulverizing chamber. Therefore, the yield of the pulverized material and the pulverization efficiency per unit weight can be improved.

Japanese Unexamined Patent Publication No. Hei 5-309287 discloses that, in order to increase the number of collisions and to make the collision more effective, as shown in FIG.
A collision member 11 composed of two collision portions is proposed. The primary pulverized material pulverized at the protruding central portion 17 is secondarily pulverized at the outer peripheral collision surface 18. Crushing chamber 13
Has a pulverizing chamber side wall 23 for tertiary pulverizing the secondary pulverized material secondary pulverized on the outer peripheral collision surface 18 by collision.

According to the impingement type air current pulverizer shown in FIGS. 20 and 21, the above-mentioned problems can be considerably improved. However, as a recent need, a finer pulverized product has been desired, and a pulverizer having good pulverization efficiency has been long-awaited. Specifically, in an image forming method by an electrophotographic method, in order to realize higher definition and higher image quality, a reduction in the diameter of the toner is desired, and a more efficient method of manufacturing the toner has been desired. I have.

[0017]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide a novel impingement type airflow pulverizer capable of efficiently pulverizing powdery raw materials and a toner using the same. Is to provide a method of manufacturing the same.

An object of the present invention is to provide a collision-type airflow pulverizer capable of efficiently pulverizing a powdery raw material by jetting powder with good dispersibility from the outlet of an acceleration tube and preventing the generation of agglomerated powder in the acceleration tube. And a method for producing a toner using the same.

An object of the present invention is to provide a collision-type airflow pulverizer capable of efficiently pulverizing powdery raw materials by colliding a powder ejected from an outlet of an acceleration tube with a large impact force when colliding with a collision member. An object of the present invention is to provide a method for producing a toner using the same.

An object of the present invention is to provide an impingement type air flow pulverizer capable of effectively performing a secondary pulverization in which a powder raw material ejected from an acceleration tube outlet and colliding with a collision surface of a collision member further collides with the inner wall of the pulverization chamber. And a method for producing a toner using the same.

An object of the present invention is to provide a method of manufacturing a toner capable of efficiently manufacturing a toner for developing an electrostatic image by solving the above-mentioned problems of the prior art.

An object of the present invention is to provide an average particle size of 200 to 200.
An object of the present invention is to provide an impinging airflow pulverizer capable of efficiently pulverizing resin particles having a diameter of 0 μm to an average particle diameter of 3 to 15 μm, and a method for producing a toner using the same.

[0023]

The above object is achieved by the present invention described below.

That is, the present invention provides a high-pressure gas supply nozzle for supplying a high-pressure gas, and a single high-pressure gas supply nozzle for conveying and accelerating the object to be ground in the acceleration tube by the high-pressure gas supplied from the high-pressure gas supply nozzle. An accelerating tube, a pulverizing chamber for finely pulverizing the object to be pulverized discharged from the accelerating tube outlet, and a pulverized material discharged from the accelerating tube outlet provided at a position facing the accelerating tube outlet in the pulverizing chamber. In a collision type airflow fine pulverizer having at least a collision member for pulverizing a pulverized material, the collision member has a first collision surface protruding toward the acceleration tube at an apex angle α about a major axis of the acceleration tube. And a second collision surface inclined downstream at an angle β with respect to a perpendicular to the long axis of the accelerating tube, and the pulverizing chamber has an outermost edge portion of the second collision surface. A first side wall upstream of the first side wall and a downstream side of the first side wall A pulverizing chamber having at least a second side wall extending downstream, wherein the pulverizing chamber upstream of the outermost edge of the second collision surface corresponds to the outermost edge of the second collision surface The inside of the crushing chamber is enlarged so as to have a portion having a larger cross-sectional area than the inner cross-sectional area, and the tip of the first collision surface is located upstream of the downstream end of the first side wall. When the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L5 , L4 and L5 satisfy the following relationship L5 ≦ L4.

Further, the present invention provides a step of melt-kneading a mixture containing at least a binder resin and a colorant to obtain a kneaded product, a step of cooling and solidifying the obtained kneaded product to obtain a solidified product,
A method for producing a toner, comprising: a step of coarsely pulverizing the obtained solidified product to obtain a coarsely pulverized product; and a step of finely pulverizing the obtained coarsely pulverized product using a collision type airflow pulverizer. A high-pressure gas supply nozzle for supplying a high-pressure gas; one accelerating tube for conveying and accelerating the object to be ground in the acceleration chamber by the high-pressure gas supplied from the high-pressure gas supply nozzle; A pulverizing chamber for finely pulverizing the pulverized material discharged from the outlet, provided in a position opposing the accelerating tube outlet in the pulverizing chamber, for pulverizing the pulverized material discharged from the accelerating tube outlet; At least a collision member, wherein the collision member has a first collision surface protruding toward the accelerator tube at an apex angle α about the major axis of the accelerator tube and a perpendicular to the major axis of the accelerator tube. And the second collision surface inclined to the downstream side at an angle β The crushing chamber has a first side wall located upstream of an outermost edge of the second collision surface, and a second side wall located downstream of the first side wall and extending downstream. The grinding chamber upstream of the outermost edge of the second collision surface is closer to the grinding chamber than the cross-sectional area of the grinding chamber corresponding to the outermost edge of the second collision surface. The first collision surface is located upstream of the downstream end of the first side wall, and the second collision surface When the length from the outermost edge of the surface to the outlet of the accelerating tube is L4, and the length from the outlet of the accelerating tube to the second side wall is L5, L4 and L5 are:
The present invention relates to a method for producing a toner, characterized by satisfying the following relationship: L5 ≦ L4.

The present inventors have conducted intensive studies on the pulverizing efficiency of the impingement type air current pulverizer, and as a result, using an impact member having a specific shape, the positional relationship between the acceleration tube outlet and the impact member has been specified, and the grinding chamber has been specified. By specifying the shape of the wall, grinding can be performed with extremely high efficiency, and the fusion, agglomeration, and coarsening of the crushed material and the occurrence of local wear on the inner wall of the acceleration tube and the collision surface of the collision member are prevented. The present inventors have found that stable and operation can be performed, and have completed the present invention.

An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the impingement type air current pulverizer of the present invention.
FIG. 1 is a schematic cross-sectional view showing an embodiment of the present invention, and a diagram showing a flowchart of a pulverizing apparatus in which a pulverizing step using the pulverizer and a classification step using a classifier are combined. FIG. 2 is an enlarged view of the impingement type air current pulverizer of FIG. 1, and FIG.
Tube throat part 2 and high pressure gas supply nozzle 3 in X-ray
FIG. 4 is a cross-sectional view showing the high-pressure gas supply port 7 and the high-pressure gas chamber 8 along the line BB in FIG. 1, and FIG. 5 is a diagram showing the crushing chamber 13 and the collision member 11 along the line CC in FIG. FIG.

The method for pulverizing the raw material with the impingement airflow pulverizer of the present invention will be described with reference to FIG. The material to be crushed supplied from the material to be crushed supply cylinder 6 includes an inner wall of an accelerating tube throat portion 2 of an accelerating tube 1 having a central axis arranged in a vertical direction,
High pressure gas supply nozzle 3 whose center is on the central axis of acceleration tube 1
To the pulverized material supply port 5 formed between the outer wall and the outer wall. On the other hand, the high-pressure gas is introduced from the high-pressure gas supply port 7, passes through the high-pressure gas chamber 8, passes through one or more high-pressure gas introduction pipes 9, and expands from the high-pressure gas supply nozzle 3 toward the acceleration pipe outlet 10. Gushing. At this time, due to the ejector effect generated in the vicinity of the accelerating tube throat portion 2, the material to be comminuted is sucked from the material supply port 5 toward the accelerating tube outlet 10 while being entrained by the gas coexisting therewith. The collision member 1 is supplied into the acceleration chamber from the periphery of the acceleration tube 1, accelerates rapidly while being uniformly mixed with the high-pressure gas in the acceleration tube throat portion 2, and is disposed opposite the acceleration tube outlet 10.
The particles are crushed by colliding with the first collision surface in a state of a uniform solid-gas mixture gas stream without unevenness in dust concentration.

In the pulverizer shown in FIG. 1, the collision surface of the collision member 11 has a discharge central portion 17 (first collision surface) that protrudes in a cone shape, and the projection central portion 17 around the projection central portion 17. 1
An outer peripheral collision surface 18 (second collision surface) for further crushing the primary crushed material crushed in 7 by collision. The crushing chamber 13 has a crushing chamber rear side wall 16 (second side wall) for tertiary crushing the secondary crushed material secondary crushed on the outer peripheral collision surface 18, and a width wider than the crushing chamber rear side wall 16. Crushing chamber front side wall 15 (first side wall). That is, the cross-sectional area of the front side wall 15 of the pulverizing chamber on the inner side of the pulverizing chamber is larger than the cross-sectional area of the rear side wall 16 of the pulverizing chamber inside.

The impact force generated at the time of collision is applied to the sufficiently dispersed individual particles (objects to be crushed), and the crushed material crushed at the collision surface of the collision member 11 is further crushed by the rear side wall 16 of the crushing chamber.
The tertiary collision is repeated between the colliding member 11 and the crushing member 11 to further increase the crushing efficiency, and the crushed material is discharged from the crushed material discharge port 14 provided behind the colliding member 11.

The diameter (width B) of the front wall 15 of the crushing chamber is larger than the diameter (width C) of the rear wall 16 of the crushing chamber, and the crushing chamber 13 gradually widens from the acceleration tube outlet 10 to the front wall 15 of the crushing chamber. As a result, the back pressure in the vicinity of the outlet of the acceleration tube is reduced, so that the collision member 11 can be brought closer to the outlet of the acceleration tube. Due to this effect, a uniform solid-gas mixture gas stream having a uniform dust concentration is sufficiently accelerated by the acceleration tube 1, so that the crushed object collides with a large impact force by the collision member 11 arranged opposite to the acceleration tube outlet 10. And crushed with extremely high efficiency. Further, since the speed of the direction of the center axis of the acceleration tube in the direction of the front wall 15 of the grinding chamber is moderately applied to the object to be ground ejected from the outlet 10 of the acceleration tube, the secondary grinding and the grinding are effectively performed on the outer peripheral collision surface 18. Tertiary pulverization is performed on the rear wall of the chamber. As shown in FIG. 6 and FIG.
Can be obtained from the acceleration tube outlet 10 in a direction perpendicular to the axial direction of the acceleration tube. FIG. 6 is a schematic cross-sectional view of an impinging airflow pulverizer, and is a diagram showing a flowchart of a pulverizer that combines a pulverizing step using the pulverizer and a classification step using a classifier, and FIG. 6 is an enlarged view of a collision type air flow pulverizer No. 6;

Since the collision surface of the collision member 11 has a protruding central portion 17 protruding in a pyramid shape and an outer peripheral collision surface 18 around the protruding central portion, resin or sticky material to be crushed is used. When pulverized, there is no fusion, agglomeration, or coarsening, and it is possible to pulverize in a state where the dust concentration is increased. Wear generated at the collision surface of the member is not locally concentrated, so that the life can be extended and stable operation can be achieved.

The crushing chamber collision wall 19 provided in the crushing chamber 13
The tertiary pulverization is performed more efficiently by the rear side wall 16 of the pulverization chamber.

Next, a more detailed description will be given with reference to FIG. 2 which is an enlarged view of the collision type air flow pulverizer of FIG.

In the impingement type air current pulverizer of the present invention, a high-pressure gas supply nozzle for supplying a high-pressure gas, and an accelerating tube for transporting and accelerating the object to be pulverized by the high-pressure gas supplied from the high-pressure gas supply nozzle. A pulverizing chamber for finely pulverizing the pulverized material discharged from the acceleration pipe outlet, and a pulverized substance discharged from the acceleration pipe outlet provided at a position facing the acceleration pipe outlet in the pulverization chamber Has at least a collision member for colliding, the collision member has a first collision surface protruding toward the accelerator tube at an apex angle α about a major axis of the accelerator tube, At least a second colliding surface inclined downstream at an angle β with respect to a perpendicular to the long axis, wherein the crushing chamber is upstream of the outermost edge of the second colliding surface A first side wall, located downstream of the first side wall and extending downstream; Having at least a second side wall,
Downstream of the outlet of the accelerating tube, the pulverizing chamber upstream of the outermost edge of the second collision surface is enlarged, and a tip of the first collision surface is a downstream end of the first side wall. It is located upstream of the section. Therefore, the second side wall is located opposite to the outermost edge of the second collision surface of the collision member.

In the first embodiment of the impingement type air crusher of the present invention, the width of the outermost edge of the outer peripheral collision surface 18 is A, and the maximum width of the front wall of the crushing chamber 13 facing the collision member 11 is B. ,
When the minimum width of the side wall 16 after the crushing chamber is C, it is preferable that the following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A, and more preferably It is preferable that the following condition is satisfied: C <B ≦ 1.2 × C A <C <1.5 × A.

In the collision-type airflow pulverizer of the first embodiment, the diameter of the acceleration pipe outlet 10 is D, and the diameter of the acceleration pipe outlet 10 from the acceleration pipe outlet 10 to the vertex of the projection central portion 17 which is the first collision surface of the collision member 11 is set. Length L ₁ , projected central part 1 as first collision surface
7 is L ₂ , the outer peripheral collision surface 18 as a second collision surface
Is L ₃ , the length from the outermost edge of the outer peripheral collision surface 18 as the second collision surface to the acceleration tube outlet 10 is L ₄ , and the distance from the acceleration tube outlet 10 to the second side wall after the pulverizing chamber. that satisfies the ≦ D / {2 × tan ( α / 2)} L 5 ≦ L 4 ≦ L 2 + L 3 | preferably below relates to when a length of up to the side wall 16 and the L ₅ | L ₁ It is more preferable that the following relationship is satisfied: 0 <L ₁ ≦ D / {2 × tan (α / 2)} L ₅ ≦ L ₄ ≦ L ₂ + L ₃ The length and length are the height and length along the long axis direction of the acceleration tube, and L ₁ is positive when the apex of the projecting central section of the collision member 11 is located upstream of the acceleration tube outlet 10. next, the apex of the projecting central portion 17 of the collision member 11 to the downstream side of the accelerating tube outlet 10 in the opposite becomes L ₁ minus when located.).

If C ≧ B, the pressure loss near the outlet of the accelerating pipe increases, the velocity of the high-pressure gas (solid-gas mixed flow) in the accelerating pipe 1 decreases, and the ejector effect in the throat portion 2 of the accelerating pipe decreases. As a result, the suction amount of the powder raw material is reduced, and the acceleration of the powder raw material is insufficient, so that the impact force on the collision surface of the collision member 11 is weakened, and the crushing efficiency is reduced.

If B> 1.6 × C, the acceleration tube outlet 10
The powder raw material ejected from the container expands excessively before colliding with the collision member 11, and the flying speed of the powder raw material is reduced near the collision surface of the collision member 11, the impact force is weakened, and the crushing efficiency is reduced.

If A ≧ C, the flow path between the impact member 11 and the rear wall 16 of the crushing chamber is closed at the outermost edge of the outer peripheral collision surface 18.

If 1.6 × A ≦ C, the outer peripheral collision surface 18
The distance between the crushing chamber and the rear side wall 16 is too large, so that effective tertiary collision in the crushing chamber rear side chamber 16 cannot be obtained, and the crushing efficiency is reduced.

If L ₁ <D / {2 × tan (α / 2)}, the collision member 11 is too far away from the acceleration tube outlet 10, so that the impact force is weakened and the crushing efficiency is reduced.

If L ₁ > D / {2 × tan (α / 2)}, the acceleration tube outlet 10 is closed by the projecting central portion 17.

0 <L ₁ means that the front end of the first collision surface is protruding into the acceleration tube, and in this case, the pulverization efficiency is further improved.

When L ₅ > L ₄ , the secondary pulverized material secondary pulverized on the outer peripheral collision surface 18 is not effectively tertiarily collided with the rear side wall 16 of the pulverizing chamber, and the pulverization efficiency is reduced.

If L ₄ > L ₂ + L ₃ , the acceleration tube outlet 1
0, the outer peripheral collision surface 18 is too far away, the impact force of the object to be crushed is weakened, and the crushing efficiency is reduced.

In the impingement type air current pulverizer of the present invention, the protruding central portion 17 which is the first impingement surface protruding in the shape of a cone.
And an outer peripheral collision surface 19 which is a second collision surface inclined downstream with respect to a perpendicular to the long axis of the acceleration tube 1.
Preferably satisfies the following relationship: 0 <α <90, β> 030 ≦ (α + 2β) ≦ 90, and more preferably the following relationship: 0 <α <90, β > 0 50 ≦ (α + 2β) ≦ 90.

When the outer peripheral collision surface 18 does not incline downstream with respect to the perpendicular to the long axis of the accelerating tube 1 and is perpendicular to the long axis of the accelerating tube 1 (ie, when β = 0), Since the reflected flow at the outer peripheral collision surface 18 flows toward the solid-gas mixed flow ejected from the acceleration tube outlet 10, the solid-gas mixed flow is likely to be disturbed, and the powder concentration at the outer peripheral collision surface 18 is further increased. When a powder of a thermoplastic resin or a powder containing a thermoplastic resin as a main component is used as a raw material, a fusion product and an agglomerate on the outer peripheral collision surface 18 are easily generated. When such a fused material is generated, it becomes difficult to operate the apparatus stably.

When (α + 2β) <30, the impact force of the primary pulverization at the projecting central portion 17 is weakened, and the pulverization efficiency is likely to be reduced.

When (α + 2β) <90, the primary pulverized material primary-pulverized at the projecting central portion 17 is not effectively secondary-collimated with the outer peripheral collision surface 18, and further, the reflected flow at the outer peripheral collision surface 18 is downstream. This tends to flow to the side, and the impact force of the tertiary pulverization on the rear side wall 16 of the pulverization chamber is weakened, so that the pulverization efficiency is likely to be reduced.

As described above, the collision type airflow pulverizer of the present invention using the impact member having a specific shape, specifying the positional relationship between the outlet of the acceleration tube and the impact member, and specifying the shape of the inner wall of the pulverizing chamber. According to this, pulverization can be performed with extremely high efficiency. That is, the back pressure of the pulverizing chamber 13 near the accelerating tube outlet 10 is reduced, and the object to be pulverized which is rapidly accelerated and ejected from the accelerating tube outlet 10 has primary, secondary and
Tertiary grinding and grinding efficiency can be improved.

In the impact-type airflow pulverizer of the present invention, the front wall 15 of the pulverizing chamber is larger than the rear wall 16 of the pulverizing chamber.
Furthermore, in order to make the effect of the tertiary pulverization when the secondary pulverized material secondary pulverized on the outer peripheral collision surface 18 serving as the second collision surface is subjected to the tertiary pulverization by collision, it is necessary to accelerate the pulverization chamber rear side wall 16. A crushing chamber collision wall 19 is provided as a third side wall inclined at an angle θ (degree) outward and downstream with respect to the long axis of the tube so as to connect the first side wall and the second side wall. 8 and 9
Of the second embodiment is preferable.

FIG. 8 shows a second embodiment of the impingement type air current pulverizer of the present invention.
FIG. 9 is a schematic cross-sectional view showing an embodiment of the present invention, and is a view showing a flowchart of a pulverizing apparatus in which a pulverizing step using the pulverizer and a classifying step using a classifier are combined, and FIG. The enlarged view of FIG.

In the collision type air current pulverizer of the second embodiment, the width of the outermost edge of the outer peripheral collision surface 18 which is the second collision surface is A, and the width of the front wall of the pulverizing chamber 13 facing the collision member 11 is A. When the maximum width is B, the re-inner edge of the crushing chamber collision wall 19 is E, and the minimum width of the second side wall 16 is C, preferably the following relationship C <B ≦ 2 × C A <C <1.6 × It is preferable that AC> E is satisfied, and more preferably, the following relationship is satisfied: C <B ≦ 1.3 × CA A <C <1.5 × AC> E.

In the collision type air current pulverizer of the second embodiment, the diameter of the acceleration tube outlet 10 is D, and the distance from the acceleration tube outlet 10 to the vertex of the projecting central portion 17 which is the first collision surface of the collision member 11 is set. Length L ₁ , projected central part 1 as first collision surface
7 is L ₂ , the outer peripheral collision surface 18 as a second collision surface
Is L ₃ , the length from the outermost edge of the outer peripheral collision surface 18 as the second collision surface to the acceleration tube outlet 10 is L ₄ ,
When the length from the outermost edge to the innermost edge of the pulverization chamber impact wall 19 as a third side wall of the L ₆ of the impact surface as the outer peripheral colliding surface 18 of the (Incidentally, these height and length , The height and length along the major axis direction of the accelerating tube.), Preferably the following relationship: | L ₁ | ≦ D / {2 × tan (α / 2)} L ₆ ≦ L ₄ ≦ L ₂ + L ₃ 0 <L ₆ <often that satisfies the 2 × L _3, more preferably the following relational _{0 <L 1 ≦ D / {} 2 × tan (α / 2)} L 6 ≦ L 4 ≦ L 2 + L ₃ 0 <it is good satisfies the L ₆ <2 × L ₃ (Note, these height and length, the height and the length along the major axis of the accelerating tube. accelerating tube outlet When the apex of the protruding central portion 17 of the collision member 11 is located on the upstream side of 10, L ₁ becomes positive, and conversely,
The projecting central portion 1 of the collision member 11 is located downstream of the acceleration tube outlet 10.
L ₁ is negative when the 7 vertex of is located).

Further, the inclination angle (θ) of the third side wall is:
Preferably, the following relationship 0 <θ <40 is satisfied, and more preferably, the following relationship 0 <θ <10 is satisfied.

When C ≧ B, the pressure loss near the outlet of the acceleration tube increases, the velocity of the high-pressure gas (solid-gas mixed flow) in the acceleration tube 1 decreases, and the ejector effect in the throat portion 2 of the acceleration tube decreases. As a result, the suction amount of the powder raw material is reduced, and the acceleration of the powder raw material is insufficient, so that the impact force on the collision surface of the collision member 11 is weakened, and the crushing efficiency is reduced.

If B> 2 × C, the powder raw material ejected from the acceleration tube outlet 10 excessively expands before colliding with the collision member 11, and the flying speed of the powder raw material near the collision surface of the collision member 11 is reduced. The impact strength is weakened and the crushing efficiency is reduced.

When A ≧ C, the flow path between the collision member 11 and the rear wall 16 of the crushing chamber is closed at the outermost edge of the outer peripheral collision surface 18.

If 1.6 × A ≦ C, the outer peripheral collision surface 18
Is too large, the effective tertiary collision at the rear wall 16 of the crushing chamber is not obtained, and the crushing efficiency is reduced.

When C ≦ E, the distance between the crushing chamber impact wall 19 and the collision member 11 is reduced, the pressure loss at this portion is increased, and the suction amount of the powder raw material is reduced as described above. Since the acceleration of the powder material is insufficient, the impact force on the collision surface of the collision member 11 is weakened, and the crushing efficiency is reduced.

If L ₁ <−D / {2 × tan (α / 2)}, the collision member 11 is too far from the acceleration tube outlet 10, so that the impact force is weakened and the pulverization efficiency is reduced.

Also, L ₁ > D / ｛2 × tan (α /
2) If｝, the acceleration tube outlet 10 is closed by the protruding central portion 17.

0 <L ₁ means that the tip of the first collision surface is protruding into the acceleration tube, and in this case, the pulverization efficiency is further improved.

When L ₅ > L ₄ , the secondary pulverized material secondary pulverized on the outer peripheral collision surface 18 is not effectively tertiarily collided with the rear side wall 16 of the pulverizing chamber, and the pulverization efficiency is reduced.

If L ₄ > L ₂ + L ₃ , the acceleration tube outlet 1
0, the outer peripheral collision surface 18 is too far away, the impact force of the object to be crushed is weakened, and the crushing efficiency is reduced.

If L ₆ ≧ 2 × L ₃ , the outer peripheral collision surface 18
The secondary pulverized material secondarily pulverized does not effectively and tertiarily collide with the pulverizing chamber collision wall 19, and the pulverization efficiency is reduced.

When θ = 0, the crushing chamber collision wall 19
And the outer peripheral end of the collision member 11 (especially the outer peripheral collision surface 18) is too long, so that an effective tertiary collision cannot be obtained and the pulverization efficiency decreases, which is not preferable.

If θ ≧ 40, the distance between the crushing chamber collision wall 19 and the outer peripheral end of the collision member 11 becomes too small, the pressure loss at this part increases, and the suction amount of the powder raw material is reduced as described above. In addition to the decrease, the acceleration of the powder material is insufficient, so that the impact force on the collision surface of the collision member 11 is weakened, which is not preferable because the pulverization efficiency is reduced.

In the collision type air current pulverizer of the present invention, the projection center portion 17 which is the first collision surface which protrudes in a cone shape is provided.
And an outer peripheral collision surface 19 which is a second collision surface inclined downstream with respect to a perpendicular to the long axis of the acceleration tube 1.
Preferably satisfies the following relationship: 0 <α <90, β> 030 ≦ (α + 2β) ≦ 90, and more preferably the following relationship: 0 <α <90, β > 0 50 ≦ (α + 2β) ≦ 90.

When the outer peripheral collision surface 18 does not incline downstream with respect to the perpendicular to the long axis of the accelerating tube 1 and is perpendicular to the long axis of the accelerating tube 1 (that is, when β = 0), Since the reflected flow at the outer peripheral collision surface 18 flows toward the solid-gas mixed flow ejected from the acceleration tube outlet 10, the solid-gas mixed flow is likely to be disturbed, and the powder concentration at the outer peripheral collision surface 18 is further increased. When a powder of a thermoplastic resin or a powder containing a thermoplastic resin as a main component is used as a raw material, a fusion product and an agglomerate on the outer peripheral collision surface 18 are easily generated. When such a fused material is generated, it becomes difficult to operate the apparatus stably.

When (α + 2β) <30, the impact force of the primary pulverization at the projecting central portion 17 is weakened, and the pulverization efficiency is likely to be reduced.

When (α + 2β) <90, the primary pulverized material primary-pulverized at the projecting central portion 17 is not effectively secondary-collimated with the outer peripheral collision surface 18, and the reflected flow at the outer peripheral collision surface 18 is further downstream. This tends to flow to the side, and the impact force of the tertiary pulverization on the rear side wall 16 of the pulverization chamber is weakened, so that the pulverization efficiency is likely to be reduced.

As described above, the collision-type airflow pulverizer of the present invention using the impact member having a specific shape, specifying the positional relationship between the outlet of the acceleration tube and the impact member, and specifying the shape of the inner wall of the pulverizing chamber. According to this, pulverization can be performed with extremely high efficiency. That is, the back pressure of the pulverizing chamber 13 near the accelerating tube outlet 10 is reduced, and the object to be pulverized which is rapidly accelerated and ejected from the accelerating tube outlet 10 has primary, secondary and
Tertiary grinding and grinding efficiency can be improved.

Such an operation efficiency can be obtained even when the diameter (width) of the crushing chamber 13 is increased from the acceleration tube outlet 10 in the direction perpendicular to the axial direction of the acceleration tube, as shown in FIGS. It is. FIG. 10 is a schematic cross-sectional view of another collision-type airflow pulverizer according to the second embodiment and a flowchart of a pulverizer that combines a pulverization process using the pulverizer and a classification process using a classifier. FIG. 11 is an enlarged view of another collision type airflow pulverizer in the second embodiment of FIG.

In the impingement type air current pulverizer of the present invention, the front wall 15 of the pulverizing chamber is larger than the rear wall 16 of the pulverizing chamber. The collision type airflow pulverizer according to the third embodiment shown in FIGS. 12 and 13 in which the side opposite to the collision surface of the collision member, that is, the downstream side is formed into a cone having a specific apex angle.

FIG. 12 is a schematic sectional view showing a third embodiment of the impingement type air current pulverizer of the present invention, and a flow chart of a pulverizer which combines a pulverization step using the pulverizer and a classification step using a classifier. FIG. FIG. 13 is an enlarged view of the collision type air flow pulverizer of FIG.

In the collision type air current pulverizer of the third embodiment, the width of the outermost edge of the outer peripheral collision surface 18 as the second collision surface is A, and the width of the front wall of the pulverization chamber 13 facing the collision member 11 is A. When the maximum width is B and the minimum width of the rear side wall 16 as the second side wall is C, preferably, the following relationship is satisfied: C <B ≦ 1.6 × CA A <C <1.6 × A It is more preferable that the following relationship is satisfied: C <B ≦ 1.2 × CA <C <1.5 × A.

In the collision type airflow pulverizer of the third embodiment, the diameter of the acceleration tube outlet 10 is D, and the distance from the acceleration tube outlet 10 to the vertex of the projecting central portion 17 which is the first collision surface of the collision member 11 is set. Length L ₁ , projected central part 1 as first collision surface
7 is L ₂ , the outer peripheral collision surface 18 as a second collision surface
L ₃ , the length from the outermost edge of the outer peripheral collision surface 18 as the second collision surface to the acceleration tube outlet 10 is L ₄ , after the grinding chamber as the second side wall from the acceleration tube 10 up to a length of the side wall 16 when the L _5, preferably below relationship | satisfies the ≦ D / {2 × tan ( α / 2)} L 5 ≦ L 4 ≦ L 2 + L 3 | L 1 It is more preferable that the following relationship is satisfied: 0 <L ₁ ≦ D / {2 × tan (α / 2)} L ₅ ≦ L ₄ ≦ L ₂ + L ₃ and length along the long axis of the accelerating tube the height and length. L ₁ when the vertex is positioned in the projecting central portion 17 of the collision member 11 on the upstream side of the accelerating tube outlet 10 is becomes positive, conversely, L ₁ is negative when the apex of the projecting central portion 17 of the collision member 11 to the downstream side of the accelerating tube outlet 10 is located).

Further, in the collision type air current pulverizer according to the third embodiment, the portion (the front pulverized material discharge port) 20 which is the widest from the lowermost portion of the rear side wall 16 of the pulverizing chamber to the pulverized material discharge port 14. Is defined as F, it is preferable that the diameter F and the minimum width C of the second side wall satisfy the following relationship: F> C.

If C ≧ B, the pressure loss near the outlet of the accelerating tube increases, the velocity of the high-pressure gas (solid-gas mixed flow) in the accelerating tube 1 decreases, and the ejector effect in the throat portion 2 of the accelerating tube decreases. As a result, the suction amount of the powder raw material is reduced, and the acceleration of the powder raw material is insufficient, so that the impact force on the collision surface of the collision member 11 is weakened, and the crushing efficiency is reduced.

If B> 1.6 × C, the acceleration tube outlet 10
The powder raw material ejected from the container expands excessively before colliding with the collision member 11, and the flying speed of the powder raw material is reduced near the collision surface of the collision member 11, the impact force is weakened, and the crushing efficiency is reduced.

When A ≧ C, the flow path between the collision member 11 and the rear wall 16 of the crushing chamber is closed at the outermost edge of the outer peripheral collision surface 18.

If 1.6 × A ≦ C, the outer peripheral collision surface 18
Is too large, the effective tertiary collision at the rear wall 16 of the crushing chamber is not obtained, and the crushing efficiency is reduced.

If L ₁ <−D / {2 × tan (α / 2)}, the collision member 11 is too far from the acceleration tube outlet 10, so that the impact force is weakened and the pulverization efficiency is reduced.

Also, L ₁ > D / ｛2 × tan (α /
2) If｝, the acceleration tube outlet 10 is closed by the protruding central portion 17.

0 <L ₁ means that the tip of the first collision surface is protruding into the acceleration tube, and in this case, the pulverization efficiency is further improved.

If L ₅ > L ₄ , the secondary pulverized material secondary pulverized on the outer peripheral collision surface 18 is not effectively tertiarily collided with the rear wall 16 of the pulverizing chamber, and the pulverization efficiency is reduced.

If L ₄ > L ₂ + L ₃ , the acceleration tube outlet 1
0, the outer peripheral collision surface 18 is too far away, the impact of the crushed object is weakened, and the crushing efficiency is reduced.

When F <C, pressure loss is caused, the discharge speed of the crushed material is reduced, the crushed material remaining in the crushing chamber 13 is increased, and the crushing efficiency is reduced.

In the collision type air current pulverizer of the third embodiment, the collision member 11 has a conical projection at the rear (downstream side), and the apex angle γ (degree) of the projection is: It is preferable that the following relationship 0 <γ <90 is satisfied, and it is more preferable that the following relationship 30 <γ <90 is satisfied.

Thus, the wide front crushing chamber outlet 2
0, the pressure loss in the vicinity of the outlet 20 of the front crushing chamber can be reduced, and the speed of the gas-solid mixture flow from the outlet 10 of the acceleration pipe to the outlet 14 of the crushed material increases. And extremely efficient pulverization can be performed.

If γ ≧ 90, the volume of the front crushing chamber discharge port 20 becomes small, and the pressure loss in the vicinity thereof is large.
The material to be ground is not discharged efficiently.

In the collision type air current pulverizer of the present invention, the apex angle α (degree) of the projection central portion 17 which is the first collision surface which protrudes in the shape of a collision member, and the length of the acceleration tube 1 relative to the long axis The inclination angle β (degree) of the outer peripheral collision surface 19, which is the second collision surface inclined to the downstream side with respect to the perpendicular, preferably satisfies the following relationship: 0 <α <90, β> 0 30 ≦ (α + 2β) ≦ 90 It is preferable that the following relationship is satisfied, and more preferably the following relationship is satisfied: 0 <α <90, β> 0 50 ≦ (α + 2β) ≦ 90.

When the outer peripheral collision surface 18 does not incline downstream with respect to the perpendicular to the long axis of the acceleration tube 1 and is perpendicular to the long axis of the acceleration tube 1 (that is, when β = 0), Since the reflected flow at the outer peripheral collision surface 18 flows toward the solid-gas mixed flow ejected from the acceleration tube outlet 10, the solid-gas mixed flow is likely to be disturbed, and the powder concentration at the outer peripheral collision surface 18 is further increased. When a powder of a thermoplastic resin or a powder containing a thermoplastic resin as a main component is used as a raw material, a fusion product and an agglomerate on the outer peripheral collision surface 18 are easily generated. When such a fused material is generated, it becomes difficult to operate the apparatus stably.

If (α + 2β) <30, the impact force of the primary pulverization at the projecting central portion 17 is weakened, and the pulverization efficiency is likely to be reduced.

If (α + 2β)> 90, the primary pulverized material primary-pulverized at the projecting central portion 17 is not effectively secondary-collimated with the outer peripheral collision surface 18, and further, the reflected flow at the outer peripheral collision surface 18 is downstream. This tends to flow to the side, and the impact force of the tertiary pulverization on the rear side wall 16 of the pulverization chamber is weakened, so that the pulverization efficiency is likely to be reduced.

As described above, the collision-type airflow pulverizer of the present invention in which the impact member having a specific shape is used, the positional relationship between the outlet of the acceleration tube and the impact member is specified, and the shape of the inner wall of the pulverizing chamber is specified. According to this, pulverization can be performed with extremely high efficiency. That is, the back pressure of the pulverizing chamber 13 near the accelerating tube outlet 10 is reduced, and the object to be pulverized which is rapidly accelerated and ejected from the accelerating tube outlet 10 has primary, secondary and
Tertiary grinding and grinding efficiency can be improved.

Such an effect can be obtained even when the diameter (width) of the crushing chamber 13 is increased from the acceleration tube outlet 10 in a direction perpendicular to the axial direction of the acceleration tube, as shown in FIGS. It is. FIG. 14 shows a schematic cross-sectional view of another collision-type airflow pulverizer according to the third embodiment, and a flowchart of a pulverizer that combines a pulverization step using the pulverizer and a classification step using a classifier. FIG. 15 is an enlarged view of another collision-type airflow pulverizer according to the third embodiment of FIG.

In the impingement type air current pulverizers of the first to third embodiments described above, the acceleration tube 1 has an inclination in the longitudinal direction of the acceleration tube, preferably from 0 to 45, with respect to the vertical line.
°, more preferably 0 to 20 °, even more preferably 0 to
It is preferable that the device is installed so as to be substantially vertical at 5 °.

If the inclination of the accelerating tube in the major axis direction is larger than 45 °, the object to be crushed stalls and is blocked in the accelerating tube, which is not preferable.

Next, the method for producing the toner of the present invention will be described.

In the method for producing a toner of the present invention, a step of melt-kneading a mixture containing at least a binder resin and a colorant to obtain a kneaded product; a step of cooling and solidifying the obtained kneaded product to obtain a solidified product; A step of coarsely pulverizing the obtained solidified product to obtain a coarsely pulverized product; and a step of finely pulverizing the obtained pulverized product using a collision type air current pulverizer.

In the method for producing a toner of the present invention, a toner material containing a load control agent and a wax, if necessary, in addition to the binder resin and the colorant, is mixed using a mixer.

As a mixer, it is preferable to use a Henschel mixer, a super mixer (Kawata Co., Ltd.), or a Lödige mixer (Ledige Co., Ltd.) for mixing for 1 to 10 minutes.

The mixture obtained in the above mixing step is
Melt kneading is performed using a kneader.

As the kneading machine, PCM, TEM (Toshiba Machine) and TEX (Nippon Steel Works) were used.
It is preferable that the mixture is melt-kneaded at a temperature of 00 to 200 ° C, preferably 100 to 160 ° C.

The kneaded material obtained by the above-described melt-kneading step is cooled to 40 ° C. or less by using a cooling roll, a cooling conveyor drum or a cooler using cooling water of 30 ° C. or less, and solidified.

The solidified product obtained by the cooling and solidifying step is roughly pulverized using a mechanical pulverizer.

As a mechanical pulverizer, a crusher mill, a hammer mill, and a roller mill can be used.

In this coarse pulverization step, in order to prevent the supply port 5 for the pulverized material from being blocked, the 50% particle size is 200 to 2%.
It is preferable to carry out pulverization so as to be 0000 μm.

The coarsely pulverized product obtained by the above coarse pulverization step is finely pulverized by using the impact type air current pulverizer of the present invention.

The finely pulverized product obtained in the above finely pulverizing step is classified using a classifier.

As a classifier, a turbo classifier (Nissin Flour Milling Co., Ltd.), Dona Selec (Nippon Donaldson Co., Ltd.), and triplon (Mitsui Miike Co., Ltd.) can be used.

The classified product obtained by the above classification step is
The weight average particle size is preferably 3 to 15 μm, more preferably 4 to 12 μm, and still more preferably 5 to 10 μm.
Is good in terms of resolution and gradation of an image to be formed.

The classified product obtained by the above classification step is
If necessary, mix with an external additive.

As a mixer used for mixing with an external additive,
A Henschel mixer, a super mixer, a Lödige mixer can be used.

As the binder resin used in the present invention, known resins can be used. For example, polystyrene; styrene-substituted homopolymers such as poly-p-chlorostyrene and polyvinyltoluene; styrene-p-chlorostyrene copolymer, styrene-vinyltoluene copolymer, styrene-vinylnaphthalene copolymer, styrene -Acrylate copolymer, styrene-methacrylate copolymer, styrene-α-chloromethyl methacrylate copolymer, styrene-acrylonitrile copolymer, styrene-vinyl methyl ether copolymer, styrene-vinyl ethyl ether Copolymer, styrene-vinyl methyl ketone copolymer, styrene-butadiene copolymer, styrene-isoprene copolymer, styrene-acrylonitrile-
Styrene copolymers such as indene copolymers; maleic acid resin, acrylic resin, methacrylic resin, silicone resin, polyester resin, polyamide resin, furan resin,
Epoxy resins, xylene resins and the like can be mentioned. In particular, a styrene copolymer, a polyester resin and an epoxy resin are preferred binder resins.

The comonomers for the styrene monomer of the styrene copolymer include acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, dodecyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, phenyl acrylate, methacrylic Monocarboxylic acids having a double bond such as acids, methyl methacrylate, ethyl methacrylate, butyl methacrylate, octyl methacrylate, acrylonitrile, methacrylonitrile, acrylamide or substituted products thereof; maleic acid, butyl maleate, methyl maleate Dicarboxylic acid having a double bond such as dimethyl maleate and a substituted product thereof; vinyl esters such as vinyl chloride, vinyl acetate and vinyl benzoate; olefins such as ethylene, propylene and butylene; vinyl Chirukento, such as vinyl vinyl hexyl ketone, vinyl methyl ether, vinyl ethyl ether, such as vinyl ether vinyl isobutyl ether. These vinyl monomers are used alone or in combination. As a crosslinking agent,
A compound having two or more polymerizable double bonds is mainly used. For example, aromatic divinyl compounds such as divinylbenzene and divinylnaphthalene; carboxylic acid esters having two double bonds such as ethylene glycol diacrylate, ethylene glycol dimethacrylate and 1,3-butanediol dimethacrylate; divinylaniline, divinyl ether And divinyl compounds such as divinyl sulfide and divinyl sulfone; and compounds having three or more vinyl groups. These may be used alone or as a mixture.

As the coloring agent used in the present invention, inorganic pigments, organic dyes and organic pigments are used.

Examples of the black colorant include a magnetic substance such as carbon black, magnetite or ferrite which is toned black using a yellow / magenta / cyan colorant.

A non-magnetic black colorant such as carbon black is used in an amount of 1 to 20 parts by weight per 100 parts by weight of the binder resin.

Examples of the magnetic material include metal oxides containing iron as a main component and optional components such as cobalt, nickel, copper, magnesium and manganese. Among them, magnetic materials containing iron oxide as a main component, such as triiron tetroxide and γ-iron oxide, are preferred. Further, from the viewpoint of controlling the chargeability of the magnetic toner, the magnetic material may contain another metal element such as a silicon element or an aluminum element. These magnetic materials have a BET specific surface area measured by a nitrogen adsorption method of preferably ^{2 to} 30 m ² / g, particularly preferably 3 to 28 m ² / g. The magnetic material is preferably a magnetic material having a Mohs hardness of 5 to 7.

The shape of the magnetic material may be 8 with little anisotropy.
A hexahedron, a hexahedron, and a sphere are preferable for increasing the image density.
The number average particle diameter of the magnetic substance is preferably 0.05 to 1.0 μm, more preferably 0.1 to 0.6 μm, and further preferably 0.1 to 0.4 μm.

The magnetic material is 30 parts by weight with respect to 100 parts by weight of the binder resin.
-200 parts by weight, preferably 40-200 parts by weight, more preferably 50-150 parts by weight. If the amount is less than 30 parts by weight, in a developing device that uses a magnetic force to transport the toner, the transportability is reduced, and the developer layer on the developer carrier is likely to be uneven, and further, the image density is reduced due to an increase in tribo. easy. On the other hand, if it exceeds 200 parts by weight, the fixability of the magnetic toner is reduced.

Examples of yellow colorants include condensed azo compounds, isoindolinone compounds, anthraquinone compounds,
Compounds represented by azo metal complexes and methine compounds are used. Specifically, C.I. I. Pigment Yellow 1
2, 13, 14, 15, 17, 62, 74, 83, 9
3, 94, 95, 97, 109, 110, 111, 12
0, 127, 128, 129, 147, 168, 17
4, 176, 180, 181, 191 and the like are preferably used.

Examples of the magenta colorant include condensed azo compounds, diketopyrrolopyrrole compounds, anthraquinones, quinacridone compounds, basic dye lake compounds, naphthol compounds, benzimidazolone compounds, thioindigo compounds and perylene compounds. Specifically, C.I.
I. Pigment Red 2, 3, 5, 6, 7, 23, 4
8; 2, 48; 3, 48; 4, 57; 1, 81; 1, 1
44, 146, 166, 169, 177, 184, 18
5, 202, 206, 220, 221, 254 are particularly preferred.

As the cyan coloring agent, copper phthalocyanine compounds and derivatives thereof, anthraquinone compounds, basic dye lake compounds and the like can be used. Specifically, C.I.
I. Pigment Blue 1, 7, 15, 15: 1, 15:
2, 15: 3, 15: 4, 60, 62, 66 and the like can be particularly preferably used.

These nonmagnetic chromatic colorants can be used alone or as a mixture in the form of a solid solution. The chromatic colorants include hue angle, saturation, lightness, weather resistance, O
It is selected from the viewpoint of HP transparency and dispersibility in toner.
The chromatic colorant is 1 to 20 parts by weight based on 100 parts by weight of the binder resin.
It is good to use parts by weight.

A wax can be contained in the toner particles from the viewpoint of improving the releasability from the fixing means at the time of fixing the toner image and improving the fixing property. Examples of the wax include paraffin wax and its derivatives, microcrystalline wax and its derivatives, Fischer-Tropsch wax and its derivatives, polyolefin wax and its derivatives, ester wax and its derivatives.
Derivatives include oxides, block copolymers with vinyl monomers, and graft modified products.

It is preferable that a charge control agent is added to toner particles (internal addition) or mixed with toner particles (external addition). The charge control agent makes it possible to control the amount of charge optimally according to the development system, and in particular, it is possible to further stabilize the balance between the particle size distribution and the amount of charge. Organometallic complexes or chelate compounds are used to control the toner to be negatively charged.
Examples thereof include a monoazo metal complex, an acetylacetone metal complex, an aromatic hydroxycarboxylic acid metal complex, and an aromatic dicarboxylic acid metal complex. Other examples include aromatic hydroxycarboxylic acids, aromatic mono- and polycarboxylic acids and metal salts, anhydrides and esters thereof; phenol derivatives such as bisphenol.

Modified products of nigrosine and fatty acid metal salts for controlling the toner to be positively charged; quaternary ammonium salts such as tributylbenzylammonium-1-hydroxy-4-naphthosulfonate and tetrabutylammonium tetrafluoroborate: Onium salts such as phosphonium salts and their lake pigments; triphenylmethane dyes and these lake pigments (as the lacking agent, phosphotungstic acid, phosphomolybdic acid, phosphotungsten molybdic acid, tannic acid, lauric acid, gallic acid,
Metal salts of higher fatty acids; diorganotin oxides such as dibutyltin oxide, dioctyltin oxide and dicyclohexyltin oxide; diorganotin borates such as dibutyltin borate, dioctyltin borate and dicyclohexyltin borate. No. These can be used alone or in combination of two or more.

The charge control agents described above are preferably used in the form of fine particles. In this case, the number average particle size of these charge control agents is particularly preferably 4 μm or less, more preferably 3 μm or less. When these charge control agents are internally added to the toner particles, it is preferable to use 0.1 to 20 parts by weight, particularly 0.2 to 10 parts by weight, based on 100 parts by weight of the binder resin.

In the present invention, it is preferable to mix an external additive with the toner particles in order to improve the properties of the toner. Examples of the external additive include inorganic fine powder.

As the inorganic fine powder, silica, alumina, titania or a double oxide thereof is preferable for improving charging stability, developability, fluidity and storage stability. As the silica, either a dry method produced by vapor phase oxidation of a silicon halide or an alkoxide, or a dry silica called fumed silica and a wet silica produced from an alkoxide, water glass or the like can be used. As having less silanol groups on the inner surface and the silica fine powder, also Na ₂
O, better less dry silica of manufacture residues of SO ₃ ^2-or the like. In the case of fumed silica, a composite fine powder of silica and another metal oxide can be obtained by using another metal halide such as aluminum chloride and titanium chloride together with a silicon halide in the manufacturing process. Can be used.

The inorganic fine powder has a BET specific surface area of 30 m ² / g or more, particularly 50 to
A range of 400 m ² / g gives good results. The inorganic fine powder is used in an amount of 0.1 to 8 parts by weight, preferably 0.5 to 5 parts by weight, more preferably 1.0 to 3.0 parts by weight, based on 100 parts by weight of the toner particles.

It is preferable that the inorganic fine powder has a primary average particle size of 30 nm or less.

The inorganic fine powder may be used, if necessary, for the purpose of hydrophobization or charge control, such as silicone varnish, various modified silicone varnishes, silicone oil, modified silicone oil,
It is preferable to be treated with a silane coupling agent, a silane coupling agent having a functional group, or another treating agent such as an organic silicon compound or an organic titanium compound. It is also preferable to treat the inorganic fine powder using a plurality of treating agents.

In order to maintain a high charge amount and achieve a high transfer rate, it is more preferable that the inorganic fine powder be treated with at least silicone oil.

In order to improve the transferability and / or the cleaning property, in addition to the above-mentioned inorganic fine powder, the primary particle size may be 3
The toner is further added with inorganic or organic particles having a spherical shape exceeding 0 nm (preferably having a specific surface area of less than 50 m ² / g), more preferably 50 nm or more (preferably having a specific surface area of less than 30 m ² / g). It is also preferred to produce. For example, spherical silica particles, spherical polymethylsilsesquioxane particles, and spherical resin particles are preferably used.

Further external additives may be further added to the toner particles within a range that does not substantially adversely affect the toner particles. Lubricant powders such as Teflon powder, zinc stearate powder, polyvinylidene fluoride powder; abrasives such as cerium oxide powder, silicon carbide powder, calcium titanate powder, strontium titanate powder; anti-caking agents; carbon black powder; Conductive agents such as powders and tin oxide powders; organic fine particles and inorganic fine particles having the opposite polarity to the toner particles.

The toner produced by the method for producing a toner of the present invention is used as a one-component developer or as a two-component developer by mixing with carrier particles.

[0144]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of toner production by the pulverizer of the present invention and a comparative example of toner production by a conventional pulverizer are shown.

(Example 1) 100 parts by weight of styrene-butyl acrylate-divinylbenzene copolymer (monomer weight ratio = 80: 19: 1, Mw = 350,000) Magnetic iron oxide (average particle size 0.18 μm) 100 parts by weight-Nigrosine 2 parts by weight-Low molecular weight ethylene-propylene copolymer 4 parts by weight The above ingredients were mixed well with a Henschel mixer FM-75 (Mitsui Miike Kakoki Co., Ltd.) and then 150 ° C.
Was kneaded with a twin-screw kneader PCM-30 (set by Ikegai Iron Works Co., Ltd.) set to 1 The obtained kneaded material was cooled and coarsely pulverized with a hammer mill to a particle size of 50% or less with a particle diameter of 1 mm or less to obtain a raw material for toner pulverization. The obtained pulverized raw material was pulverized by the impingement airflow pulverizer shown in FIGS.

In the collision type air flow pulverizer, the position of the tip of the protruding central portion which protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear side wall of the crushing chamber is 136 mm (C = 1
36 mm). Therefore, the cross-sectional area on the inner side of the crushing chamber at the front wall of the crushing chamber was larger than the cross-sectional area on the inner side of the crushing chamber at the rear wall of the crushing chamber corresponding to the outermost edge of the second collision surface. Impact member 1
1 has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β = 10 °). is there. Therefore, (α + 2β) is 75 °.

The pulverized raw material was supplied to the forced vortex type air classifier at a rate of 54 kg / h by the constant-rate feeder, and the classified coarse powder was introduced into the collision type air flow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the weight average diameter was 8.0 μm as the classified fine powder.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

An amino-modified silicone oil-treated silica fine powder was mixed with the obtained classified product to obtain a positively chargeable toner.
When an image was formed using a commercially available laser beam printer LBP-450 (manufactured by Canon), a good image was obtained.

Although the particle size distribution of the finely pulverized product can be measured by various methods, in the present invention, the measurement was performed using a Coulter counter.

That is, a Coulter counter TA-II type (manufactured by Coulter) was used as a measuring device, and an interface (manufactured by Nikkaki) for outputting the number distribution and volume distribution and a CX-1 personal computer (manufactured by Canon Inc.) were connected. The electrolyte is 1% sodium chloride.
% NaCl aqueous solution is prepared. As a measuring method, a surfactant, preferably an alkylbenzene sulfonate, is used as a dispersant in 100 to 150 ml of the electrolytic aqueous solution.
Add ５5 ml, and then add 2-20 mg of the measurement sample. The electrolytic solution in which the sample was suspended was subjected to dispersion treatment for about 1 to 3 minutes using an ultrasonic disperser, and the above Coulter counter TA-I was used.
The type I was used to measure the particle size distribution of 2 to 40 μm particles based on the number, using a 100 μm aperture, and then the volume-based weight average particle size determined from the volume distribution according to the present invention.

The 50% particle size (D ₅₀ ) of the coarsely pulverized product was determined by obtaining a partial separation efficiency curve based on the weight remaining on each of several standard sieves.

Example 2 The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer shown in FIG.

In the collision type air flow pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear side wall of the crushing chamber is 136 mm (C = 1
36 mm). Therefore, the cross-sectional area on the inner side of the crushing chamber at the front wall of the crushing chamber was larger than the cross-sectional area on the inner side of the crushing chamber at the rear wall of the crushing chamber corresponding to the outermost edge of the second collision surface. Impact member 1
1 has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β = 10 °). is there. Therefore, (α + 2β) is 75 °.

The pulverized raw material is supplied to the forced vortex type air classifier at a rate of 53 kg / h by the constant-rate feeder, and the classified coarse powder is introduced into the collision type air flow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 3) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer shown in FIG. The configuration of the collision type air flow pulverizer is the same as that used in the first embodiment.

The pulverized raw material is supplied to the forced vortex type air classifier at a rate of 36 kg / h by the quantitative feeder, and the classified coarse powder is introduced into the collision type air flow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 6.0 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 4) The same toner pulverizing raw material as in Example 1 was pulverized by an impingement airflow pulverizer shown in FIG. The configuration of the collision type air flow pulverizer is the same as that used in the second embodiment.

The pulverized raw material was supplied at a rate of 35 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

Example 5 The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG.

In the collision type air flow pulverizer, the center of the protrusion does not protrude into the acceleration tube, and the position of the tip is −5 mm (L ₁
= −5 mm) and the diameter of the front wall of the crushing chamber is 154 mm.
(B = 154 mm), and the diameter of the rear wall of the grinding chamber is 13
6 mm (C = 136 mm). Therefore, the cross-sectional area inside the crushing chamber front wall was larger than the cross-sectional area inside the crushing chamber inside the rear wall of the crushing chamber corresponding to the outermost edge of the second collision surface. The projecting central portion 17 of the collision member 11 has an apex angle of 55 ° (α
= 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the center axis of the acceleration tube 1 is 10 ° (β = 10 °).
It is. Therefore, (α + 2β) is 75 °.

The pulverized raw material was supplied at a rate of 52 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product).

(Example 6) Using the same toner pulverization raw material as in Example 1, pulverization was carried out by an impingement airflow pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 5.

The pulverized raw material is supplied at a rate of 34 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder is introduced into a collision type airflow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 7) Using the same toner pulverizing raw material as in Example 1, pulverization was carried out using an impingement airflow pulverizer as shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear side wall of the crushing chamber is 136 mm (C = 1
36 mm). Therefore, the cross-sectional area inside the crushing chamber front wall was larger than the cross-sectional area inside the crushing chamber inside the rear wall of the crushing chamber corresponding to the outermost edge of the second collision surface. The projecting central portion 17 of the collision member 11 has a conical shape with an apex angle of 65 ° (α = 65 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 15 ° (β = 15 °). ). Therefore, (α + 2β) is 95 °.

The pulverized raw material was supplied at a rate of 50 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, at a pressure of 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision-type airflow pulverizer, and stable operation was possible. However, when the supply amount of the pulverized raw material was more than 50 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

Example 8 The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 7.

The pulverized raw material was supplied at a rate of 33 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision-type airflow pulverizer, and stable operation was possible. However, when the supply amount of the pulverized raw material was more than 33 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

Example 9 The same toner pulverization raw material as in Example 1 was pulverized by a collision type air pulverizer as shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear wall 16 of the grinding chamber is 136 mm (C
= 136 mm), the diameter of the innermost edge of the crushing chamber collision wall 19 is 132 mm (E = 132 mm), and the distance from the outermost edge of the second collision surface of the collision member to the innermost edge of the crushing chamber collision wall is The length is 35 mm (L ₆ = 35 mm), and the angle formed by the crushing chamber collision wall 19 with the center axis of the acceleration tube 1 is 8 ° (θ).
= 8 °). The projecting central portion 17 of the collision member 11 has a conical shape with a right angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β
= 10 °). Therefore, (α + 2β) is 75 °
It is. Therefore, the cross-sectional area on the upstream side of the crushing chamber was larger than the cross-sectional area on the side of the crushing chamber corresponding to the outermost edge of the second collision surface.

The pulverized raw material was supplied at a rate of 52 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the weight average diameter was 8.0 μm as the classified fine powder.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

An image was formed using a positively chargeable toner prepared by mixing the finely divided silica obtained in the same manner as in Example 1 with amino-modified silicone oil-treated silica fine powder.
Good images were obtained.

Example 10 Using the same toner pulverizing raw material as in Example 1, pulverization was carried out by an impingement airflow pulverizer shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion which protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear wall 16 of the grinding chamber is 136 mm (C
= 136 mm), the diameter of the innermost edge of the crushing chamber collision wall 19 is 132 mm (E = 132 mm), and the distance from the outermost edge of the second collision surface of the collision member to the innermost edge of the crushing chamber collision wall is The length is 35 mm (L ₆ = 35 mm), and the angle formed by the crushing chamber collision wall 19 with the center axis of the acceleration tube 1 is 8 ° (θ).
= 8 °). The projecting central portion 17 of the collision member 11 has a conical shape with a right angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β
= 10 °). Therefore, (α + 2β) is 75 °
It is. Therefore, the cross-sectional area on the upstream side of the crushing chamber was larger than the cross-sectional area on the side of the crushing chamber corresponding to the outermost edge of the second collision surface.

The pulverized raw material was supplied at a rate of 51 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

Example 11 The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG. The configuration of the collision type air flow pulverizer is the same as that used in the ninth embodiment.

The pulverized raw material was supplied at a rate of 34 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 6.0 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the impingement airflow pulverizer, and stable operation was possible.

(Example 12) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer shown in FIG. The configuration of the collision type airflow pulverizer is the same as that used in the tenth embodiment.

The pulverized raw material was supplied at a rate of 33 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 13) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG.

In the collision type air flow pulverizer, the center of the protrusion does not protrude into the acceleration tube, and the position of the tip is −5 mm (L ₁
= −5 mm) and the diameter of the front wall of the crushing chamber is 154 mm.
(B = 154 mm), and the diameter of the rear wall of the grinding chamber is 13
6 mm (C = 136 mm), and the length from the outermost edge of the second collision surface of the collision member to the innermost edge of the crushing chamber collision wall is 35 mm (L ₆ = 35 mm). The projecting central portion 17 of the collision member 11 has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β = 10 °). ). Therefore,
(Α + 2β) is 75 °. Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface.

The pulverized raw material was supplied at a rate of 48 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 14) The same toner pulverization raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 13.

The pulverized raw material was supplied at a rate of 31 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 15) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion which protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear side wall of the crushing chamber is 136 mm (C = 1
36 mm), and the length from the outermost edge of the second collision surface of the collision member to the innermost edge of the crushing chamber collision wall is 35 mm (L).
₆ = 35 mm). Projecting central portion 17 of collision member 11
Has a conical shape with an apex angle of 65 ° (α = 65 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 15 °.
° (β = 15 °). Therefore, (α + 2β) is 95 °. Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface.

The pulverized raw material is supplied to the forced vortex type air classifier at a rate of 47 kg / h by the constant-rate feeder, and the classified coarse powder is introduced into the collision type air flow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). The collision member of the collision-type air-flow crusher did not generate any fused material, and could operate stably. However, when the supply amount of the crushed raw material was more than 47 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

(Example 16) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 15.

The pulverized raw material is supplied at a rate of 31 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder is introduced into a collision type airflow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). The collision member of the collision-type airflow pulverizer did not generate any fused material, and could operate stably. However, when the supply amount of the pulverized raw material was larger than 31 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

(Example 17) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), the diameter of the rear wall of the crushing chamber is 136 mm (C = 136 m).
m), the diameter of the front pulverized material discharge port is 152 mm (F = 15
2 mm). Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface. Projecting central portion 17 of collision member 11
Has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 °.
° (β = 10 °). Therefore, (α + 2β) is 75 °. The apex angle at the rear of the collision member is 80 ° (γ = 80
°).

The pulverized raw material was supplied at a rate of 50 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the weight average diameter was 8.0 μm as the classified fine powder.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

An image was formed by using a positively chargeable toner prepared by mixing fine particles of silica treated with amino-modified silicone oil with the classified product obtained in the same manner as in Example 1.
Good images were obtained.

(Example 18) Using the same toner pulverizing raw material as in Example 1, pulverization was carried out by a collision type air pulverizer shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), the diameter of the rear wall of the crushing chamber is 136 mm (C = 136 m).
m), the diameter of the front pulverized material discharge port is 152 mm (F = 15
2 mm). Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface. Projecting central portion 17 of collision member 11
Has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 °.
° (β = 10 °). Therefore, (α + 2β) is 75 °. The apex angle at the rear of the collision member is 80 ° (γ = 80
°).

The pulverized raw material was supplied at a rate of 49 kg / h to a forced vortex type air classifier by a constant feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 19) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer shown in FIG. The configuration of the collision type air flow pulverizer is the same as that used in Example 17.

The pulverized raw material was supplied at a rate of 33 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 6.0 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 20) Using the same toner pulverizing raw material as in Example 1, pulverization was carried out with a collision type air current pulverizer shown in FIG. The configuration of the collision type air flow pulverizer is the same as that used in Example 18.

The pulverized raw material was supplied at a rate of 33 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 21) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer as shown in FIG.

In the collision type airflow pulverizer, the center of the protrusion does not protrude into the acceleration tube, and the position of the tip is −5 mm (L ₁
= −5 mm) and the diameter of the front wall of the crushing chamber is 154 mm.
(B = 154 mm), and the diameter of the rear wall of the grinding chamber is 13
6 mm (C = 136 mm). Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface. Collision member 11
Has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the accelerating tube 1 is 10 ° (β = 10 °). . Therefore, (α + 2β) is 75 °.

The pulverized raw material is supplied at a rate of 48 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder is introduced into a collision type airflow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 22) The same toner pulverization raw material as in Example 1 was pulverized by a collision type air pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 21.

The pulverized raw material was supplied at a rate of 31 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Example 23) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG.

In the impingement type air current pulverizer, the position of the tip of the protruding central portion that protrudes into the acceleration tube is 10 mm (L ₁ = 10 mm), and the diameter of the front wall of the pulverization chamber is 154 mm (B = 154 m).
m), and the diameter of the rear side wall of the crushing chamber is 136 mm (C = 1
36 mm). Therefore, the cross-sectional area on the upstream side inside the coarse powder chamber was larger than the cross-sectional area on the inside of the pulverizing chamber corresponding to the outermost edge of the second collision surface. Projecting central part 1 of collision member 11
7 has a conical shape with an apex angle of 65 ° (α = 65 °),
The inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 1
5 ° (β = 15 °). Therefore, (α + 2β)
Is 95 °.

The pulverized raw material is supplied to the forced vortex type air classifier at a rate of 47 kg / h by the quantitative feeder, and the classified coarse powder is introduced into the collision type air flow pulverizer, and the pressure is 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). The collision member of the collision-type air-flow crusher did not generate any fused material, and could operate stably. However, when the supply amount of the crushed raw material was more than 47 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

(Example 24) The same toner pulverization raw material as in Example 1 was pulverized by a collision type air current pulverizer as shown in FIG. The impingement type air current pulverizer is the same as that used in Example 23.

The pulverized raw material was supplied at a rate of 31 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type air flow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). The collision member of the collision-type airflow pulverizer did not generate any fused material, and could operate stably. However, when the supply amount of the pulverized raw material was larger than 31 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

(Comparative Example 1) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer shown in FIG.

In the collision type air flow pulverizer, the central portion of the protrusion does not protrude into the acceleration tube, and the position of the tip is −5 mm (L ₁
= -5 mm) and the diameter of the front wall of the crushing chamber is 140 mm
(B = 140mm), the diameter of the rear wall of the crushing chamber is 140mm
(C = 140 mm), the diameter of the front pulverized material outlet is 140
mm (F = 140 mm). The projecting central portion 17 of the collision member 11 has a conical shape with a vertical angle of 55 ° (α = 55 °), and the inclination angle of the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1 is 10 ° (β = 10 °). ). Therefore, (α +
2β) is 75 °. 180 ° vertical angle at the rear of the impact member
(Γ = 180 °).

The pulverized raw material was supplied at a rate of 46 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type air flow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). The collision member of the collision-type airflow pulverizer did not generate any fused material, and could operate stably. However, when the supply amount of the pulverized raw material was more than 46 kg / h, the weight average diameter of the obtained fine powder was increased. Oops.

(Comparative Example 2) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer shown in FIG.

The impingement type air current pulverizer used had a collision surface in a plane shape perpendicular to the longitudinal direction of the accelerating tube, and the pulverizing chamber was box-shaped.

The pulverized raw material was supplied at a rate of 18 kg / h to a forced vortex type air classifier by a constant-rate feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer at a pressure of 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 8.3 μm.
To obtain a finely pulverized product for toner (classified product). When the supply amount of the pulverized raw material is more than 18 kg / h, the weight average diameter of the obtained fine powder becomes large, and fusion of the pulverized material on the collision member, agglomerates, and coarse particles begin to occur. However, there was a case where the material inlet of the acceleration tube was clogged, and stable operation was not possible.

(Comparative Example 3) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer shown in FIG.

In the collision type air current pulverizer, the projecting central portion 17 of the collision member 11 has a conical shape with a vertical angle of 55 ° (α = 55 °), and the outer peripheral collision surface 18 with respect to the central axis of the acceleration tube 1. The inclination angle is 10 ° (β = 10 °). Therefore,
(Α + 2β) is 75 °. The crushing chamber is box-shaped.

The pulverized raw material was supplied at a rate of 22 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, as a classified fine powder, the weight average diameter was 8.1 μm.
To obtain a finely pulverized product for toner (classified product). When the supply amount of the pulverized raw material was more than 22 kg / h, the weight average diameter of the obtained fine powder was increased. No generation of fused material was observed on the collision member of the collision type air current pulverizer.

(Comparative Example 4) Using the same toner pulverization raw material as in Example 1, pulverization was carried out by an impingement airflow pulverizer shown in FIG. The configuration of the impingement airflow pulverizer is the same as that used in Comparative Example 1.

The pulverized raw material was supplied at a rate of 30 kg / h to a forced vortex type air classifier by a quantitative feeder, and the classified coarse powder was introduced into a collision type airflow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.1 μm.
To obtain a finely pulverized product for toner (classified product). When the supply amount of the pulverized raw material was more than 30 kg / h, the weight average diameter of the obtained fine powder was increased. There was no fusion material generated in the collision member of the collision type air flow crusher, and stable operation was possible.

(Comparative Example 5) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer shown in FIG. The configuration of the impingement airflow pulverizer is the same as that used in Comparative Example 2.

The ground raw material was supplied to the forced vortex type air classifier at a rate of 8 kg / h by the quantitative feeder, and the classified coarse powder was introduced into the collision type air flow pulverizer, and the pressure was 6.0 kg / cm ^2.
(G) After pulverization using 6.0 m ³ / min compressed air, the mixture was circulated again to a classifier to perform closed circuit pulverization. As a result, a finely pulverized toner product (classified product) having a weight average diameter of 6.4 μm was obtained as classified fine powder. When the supply amount of the pulverized raw material is larger than 8 kg / h, the weight average diameter of the obtained fine powder is increased, and when the supply amount is larger than 18 kg / h, fusion of the pulverized material on the collision member, Aggregates,
Coarse particles began to be generated, and the fused material sometimes clogged the raw material inlet of the acceleration tube, and stable operation was not possible.

(Comparative Example 6) The same toner pulverizing raw material as in Example 1 was pulverized by a collision type air pulverizer shown in FIG. The structure of the impingement type air current pulverizer is the same as that used in Comparative Example 3.

The pulverized raw material was supplied to the forced vortex type air classifier at a rate of 14 kg / h by the quantitative feeder, and the classified coarse powder was introduced into the collision type air flow pulverizer, and the pressure was 6.0 kg / cm.
² (G), pulverized using 6.0 m ³ / min compressed air, circulated again to the classifier, and closed circuit pulverized.
As a result, the classified fine powder had a weight average diameter of 6.2 μm.
To obtain a finely pulverized product for toner (classified product). When the supply amount of the pulverized raw material was larger than 14 kg / h, the weight average diameter of the obtained fine powder was increased. No generation of fused material was observed on the collision member of the collision type air current pulverizer.

The results of Examples 1 to 24 and Comparative Examples 1 to 6 are summarized in Table 1.

In Table 1, the grinding efficiency ratio is shown as a ratio of the supply amount under each condition to the supply amount of Comparative Example 3.

[0228]

[Table 1]

[0229]

[Table 2] * Equipment stability A: No fused matter is generated in the collision member even if the supply amount of powder raw material is more than 20 kg / h. B: Fused matter is generated in the collision member until the supply amount of powder raw material is 20 kg / h. None C: When the powder raw material supply amount is up to 20 kg / h, fusion material is generated on the collision member.

[0230]

As described above, according to the impingement type air current pulverizer of the present invention, the objects to be pulverized are dispersed and introduced into the accelerating tube so that the dust concentration is not biased. By appropriately expanding the chamber, lowering the back pressure near the outlet of the acceleration tube and bringing the collision member closer to the acceleration tube,
The moderately accelerated and expanded solid-gas mixed flow is jetted with high dispersion energy toward the collision member facing the outlet of the acceleration tube with good dispersion energy, and is primarily pulverized at the center of the conical projection provided on the collision member, and further protruded. After the secondary pulverization at the outer peripheral collision surface provided around the central portion, the pulverization is further performed at the rear side wall of the pulverizing chamber. For this reason, compared with the conventional collision type air-flow crusher, the crushing efficiency is greatly improved, and the particle size of the product obtained with the same processing capacity can be further reduced.

Since the material to be crushed collides with the collision surface of the collision member in a state of being appropriately dispersed, even when the powder mainly composed of a thermoplastic resin is used as a raw material, fusion, aggregation,
Prevents coarsening and local abrasion on the inner wall of the accelerating tube and the collision surface of the collision member, enables stable operation, prevents over-grinding, and finely crushes with a sharp particle size distribution. Goods are obtained.

According to the impingement type air current pulverizer of the present invention,
% Can be efficiently pulverized to a weight average particle size of 3 to 15 μm, so that a toner for developing an electrostatic image, for which miniaturization is desired, can be efficiently obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a collision type airflow pulverizer of the present invention.

FIG. 2 is an enlarged view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view taken along the line CC of FIG. 1;

FIG. 6 is a schematic cross-sectional view showing one example of a collision type airflow pulverizer of the present invention.

FIG. 7 is an enlarged view of FIG. 6;

FIG. 8 is a schematic cross-sectional view showing one example of a collision type airflow pulverizer of the present invention.

FIG. 9 is an enlarged view of FIG. 8;

FIG. 10 is a schematic cross-sectional view showing one example of a collision type air flow pulverizer of the present invention.

FIG. 11 is an enlarged view of FIG. 10;

FIG. 12 is a schematic cross-sectional view showing one example of a collision type air flow pulverizer of the present invention.

FIG. 13 is an enlarged view of FIG.

FIG. 14 is a schematic cross-sectional view showing one example of a collision type airflow pulverizer of the present invention.

FIG. 15 is an enlarged view of FIG. 14;

FIG. 16 is a schematic cross-sectional view showing a conventional collision type airflow pulverizer.

FIG. 17 is a schematic cross-sectional view showing another conventional collision type airflow pulverizer.

FIG. 18 is a schematic sectional view showing another conventional collision-type airflow pulverizer.

FIG. 19 is a schematic cross-sectional view showing another conventional collision type airflow pulverizer.

FIG. 20 is a schematic sectional view showing another conventional collision-type airflow pulverizer.

FIG. 21 is a schematic sectional view showing another conventional collision-type airflow pulverizer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acceleration pipe 2 Acceleration pipe throat part 3 High pressure gas supply nozzle 4 High pressure gas supply nozzle throat part 5 Pulverized material supply port 6 Pulverized substance supply cylinder 7 High pressure gas supply port 8 High pressure gas chamber 9 High pressure gas introduction pipe 10 Acceleration pipe outlet REFERENCE SIGNS LIST 11 collision member 12 collision member support 13 crushing chamber 14 crushed material discharge port 15 crushing chamber front side wall (first side wall) 16 crushing chamber rear side wall (second side wall) 17 projected central portion (first collision surface) 18 Outer collision surface (second collision surface) 19 Crushing chamber collision wall (third side wall) 20 Front pulverized material discharge port 21 Collision member rear part 22 Powder material input port 23 Pulverization chamber side wall

──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number Japanese Patent Application No. 9-163165 (32) Priority date June 20, 1997 (June 20, 1997) (33) Priority claim country Japan (JP) (56) References JP-A 8-182937 (JP, A) JP-A 8-182936 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B02C 19/06

Claims (32)

(57) [Claims] A high-pressure gas supply nozzle for supplying a high-pressure gas, and a high-pressure gas supplied from the high-pressure gas supply nozzle for transporting and accelerating an object to be ground in the acceleration tube.
The accelerating tube, the pulverizing chamber for finely pulverizing the material to be pulverized discharged from the accelerating tube outlet, is discharged from the accelerating tube outlet provided at a position facing the accelerating tube outlet in the pulverizing chamber. A collision type airflow fine pulverizer having at least a collision member for pulverizing the object to be pulverized, wherein the collision member protrudes toward the acceleration tube at an apex angle α about a major axis of the acceleration tube. A collision surface, and at least a second collision surface inclined downstream at an angle β with respect to a perpendicular to the long axis of the accelerating tube; At least a first side wall located upstream of the outer edge and a second side wall located downstream of the first side wall and extending downstream.
The crushing chamber upstream of the outermost edge of the collision surface is compared with the cross-sectional area of the crushing chamber corresponding to the outermost edge of the second collision surface.
The first collision surface is located upstream of the downstream end of the first side wall; When the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L5, L4 and L5 are as follows: A collision type air current pulverizer characterized by satisfying a relationship L5 ≦ L4. 2. The apex angle α (°) and the inclination angle β (°)
The impinging airflow pulverizer according to claim 1, wherein the following expression is satisfied: 0 <α <90, β > 030 ≦ α + 2β ≦ 90. 3. The width of the outermost edge of the second collision surface is A, the maximum width of the front wall of the crushing chamber facing the collision member is B, and the minimum width of the second side wall is C. Sometimes A, B and C are
The impingement type air current pulverizer according to claim 1 or 2, wherein the following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A. 4. The width of the outermost edge of the second collision surface is A, the maximum width of the front wall of the crushing chamber facing the collision member is B, and the minimum width of the second side wall is C. Sometimes A, B and C are
The following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A, the diameter of the outlet of the accelerator tube is D, and the length from the outlet of the accelerator tube to the vertex of the first collision surface is L1, the height of the first collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: | L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 The impingement type airflow pulverizer according to claim 1 or 2. 5. When the width of the outermost edge of the second collision surface is A, the width of the front wall of the crushing chamber facing the collision member is B, and the width of the second side wall is C. The following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A, the diameter of the outlet of the accelerator tube is D, and the length from the outlet of the accelerator tube to the vertex of the first collision surface is L1, the height of the first collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: 0 <L1 ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 3. The impingement airflow pulverizer according to claim 1 or 2, wherein 6. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and extending downstream. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and are angled outward and downstream with respect to the long axis of the acceleration tube. at least a third side wall inclined at an angle θ (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member. When B is the width of the innermost edge of the third side wall, and C is the minimum width of the second side wall, A, B, C, D, and E have the following relationship: C <B ≦ 2 × The impingement type air-flow crusher according to claim 1 or 2, wherein a relationship of CA <C <1.6 x AC> E is satisfied. 7. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and a downstream side extending from the first side wall. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and the angle θ is outward and downstream with respect to the long axis of the acceleration tube. (Degree), and a third side wall inclined at an angle (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member is A. B, when the width of the innermost edge of the third side wall is E and the minimum width of the second side wall is C,
A, B, C, D and E satisfy the following relationship: C <B ≦ 2 × C A <C <1.6 × AC> E, the acceleration tube outlet diameter is D, and the acceleration tube outlet is From the first collision surface to the vertex of the first collision surface is L1, and the height of the first collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator tube is L4, and the height from the outermost edge of the second collision surface is L3. L1, L2, L3, L4 and L6 when the length to the innermost edge of the side wall of No. 3 is L6.
Satisfies the following relationship: | L1 | ≦ D / {2 × tan (α / 2)} L6 ≦ L4 ≦ L2 + L3 0 <L6 <2 × L3, and the inclination angle θ (°) of the third side wall satisfies the following relationship: 0 The collision-type airflow pulverizer according to claim 1 or 2, wherein <θ <40 is satisfied. 8. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and extending downstream. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and the angle θ is outward and downstream with respect to the long axis of the acceleration tube. (Degree), and a third side wall inclined at an angle (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member is A. B, when the width of the innermost edge of the third side wall is E, and the minimum width of the second side wall is C, A, B, C, D and E have the following relationship: C <B ≦ 2 × C A <C <1.6 × A C> E is satisfied, the diameter of the exit of the acceleration tube is D, the length from the exit of the acceleration tube to the vertex of the first collision surface is L1, and the first is The height of the collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator tube is L4, and the height from the outermost edge of the second collision surface is L3. L1, L2, L3, L4 and L6 when the length to the innermost edge of the side wall of No. 3 is L6.
Satisfies the following relationship: 0 <L1 ≦ D / {2 × tan (α / 2)} L6 ≦ L4 ≦ L2 + L3 0 <L6 <2 × L3, and satisfies 0 <θ <40. The impingement type airflow pulverizer according to claim 1 or 2. 9. The collision member has a pyramid shape having an apex angle γ (°) on a side opposite to a side on which the first collision surface and the second collision surface are provided; When the width of the outermost edge of A is B, the maximum width of the front wall of the crushing chamber facing the collision member is B, and the minimum width of the second side wall is C, A, B and C have the following relationship C 3. The impinging airflow pulverizer according to claim 1, wherein the following formula is satisfied: <B ≦ 1.6 × CA <C <1.6 × A. 10. The collision member includes a first collision surface and a second collision surface.
The side opposite to the side where the collision surface is provided is a cone having an apex angle γ (°), the width of the outermost edge of the second collision surface is A, and the grinding chamber facing the collision member When the maximum width of the front wall is B and the minimum width of the second side wall is C, A, B and C are in the following relationship: C <B ≦ 1.6 × C A <C <1.6 × A Satisfying the relationship, D is the exit diameter of the acceleration tube, L1 is the length from the exit of the acceleration tube to the vertex of the first collision surface, and L is the height of the first collision surface.
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: | L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3, When the width of the widest part from the lowermost part of the second side wall to the pulverized material discharge port is F, F and C satisfy the following relationship F> C, and the apex angle γ (°) of the collision member is 3. The impingement type airflow pulverizer according to claim 1, wherein the following relationship is satisfied: 0 <γ <90. 11. The collision member comprises a first collision surface and a second collision surface.
The side opposite to the side where the collision surface is provided is a cone having an apex angle γ (°), the width of the outermost edge of the second collision surface is A, and the grinding chamber facing the collision member When the maximum width of the front wall is B and the minimum width of the second side wall is C, A, B and C are in the following relationship: C <B ≦ 1.6 × C A <C <1.6 × A Satisfying the relationship, D is the exit diameter of the acceleration tube, L1 is the length from the exit of the acceleration tube to the vertex of the first collision surface, and L is the height of the first collision surface.
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: 0 <L1 ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 When the width of the widest part from the lowermost part of the second side wall to the pulverized material discharge port is F, F and C satisfy the following relationship F> C, and the apex angle γ (°) of the collision member is 3. The impingement type airflow pulverizer according to claim 1, wherein the following relationship is satisfied: 0 <γ <90. 12. The acceleration tube according to claim 1, wherein an inclination of the acceleration tube in a longitudinal direction of the acceleration tube with respect to a vertical line is 0 to 45 °. Collision type air crusher. 13. The accelerating tube according to claim 1, wherein the inclination of the accelerating tube in a longitudinal direction of the accelerating tube is 0 to 20 ° with respect to a vertical line. Collision type air crusher. 14. The acceleration tube according to claim 1, wherein the inclination of the acceleration tube in a major axis direction is 0 to 5 ° with respect to a vertical line, and the acceleration tube is substantially vertically installed. The collision-type airflow pulverizer according to any one of 11 above. 15. The pulverizing chamber is downstream of the collision member, and has a pulverized material discharge port for discharging pulverized material pulverized from the pulverization chamber behind the collision member. The impingement type air current pulverizer according to any one of claims 1 to 14, wherein: 16. The accelerating tube according to claim 1, wherein the accelerating tube has an object supply port for supplying an object to be comminuted from the periphery of the accelerating tube to the inside of the accelerating tube. The impingement airflow crusher as described. 17. A step of melting and kneading a mixture containing at least a binder resin and a colorant to obtain a kneaded product, a step of cooling and solidifying the obtained kneaded product to obtain a solidified product, and a step of obtaining a solidified product. Pulverizing to obtain a coarsely pulverized product, and finely pulverizing the obtained coarsely pulverized product using a collision-type airflow pulverizer, wherein the collision-type airflow pulverizer supplies a high-pressure gas. High-pressure gas supply nozzle, a single accelerating tube for conveying and accelerating the object to be pulverized in the acceleration chamber by the high-pressure gas supplied from the high-pressure gas supply nozzle, and the pulverized material discharged from the acceleration tube outlet A pulverizing chamber for finely pulverizing the material, and at least a collision member provided at a position facing the accelerating pipe outlet in the pulverizing chamber for pulverizing the material to be pulverized discharged from the accelerating pipe outlet. And the collision member is a length of the acceleration tube. A first collision surface protruding toward the accelerating tube side at an apex angle α with respect to the center and a second collision surface inclined downstream at an angle β with respect to a perpendicular to the long axis of the accelerating tube. At least, the crushing chamber has a first side wall located upstream of an outermost edge of the second collision surface, and a second side wall located downstream of the first side wall and extending downstream. And at least a second side wall of the second
So that the crushing chamber on the upstream side of the outermost edge of the collision surface has a portion having a larger cross-sectional area on the crushing chamber side than the cross-sectional area on the crushing chamber side corresponding to the outermost edge of the second collision surface. An end of the first collision surface is located upstream of a downstream end of the first side wall, and an outlet of the acceleration tube from an outermost edge of the second collision surface Where L4 is a length from the outlet of the acceleration tube to L2, and L5 and L5 satisfy the following relationship: L5 ≦ L4. Method. 18. The apex angle α (°) and the inclination angle β (°)
18 satisfies the following formula: 0 <α <90, β > 0 30 ≦ α + 2β ≦ 90. 19. The width of the outermost edge of the second collision surface is A,
When the maximum width of the front wall of the grinding chamber facing the collision member is B, and the minimum width of the second side wall is C, A, B, and C are:
The method according to claim 17, wherein the following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A. 20. The width of the outermost edge of the second collision surface is A,
When the maximum width of the front wall of the grinding chamber facing the collision member is B, and the minimum width of the second side wall is C, A, B, and C are:
The following relationship is satisfied: C <B ≦ 1.6 × CA <C <1.6 × A, the diameter of the outlet of the accelerator tube is D, and the length from the outlet of the accelerator tube to the vertex of the first collision surface is L1, the height of the first collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: | L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 The method for producing a toner according to claim 17, wherein: 21. The width of the outermost edge of the second collision surface is A,
The width of the front wall of the grinding chamber facing the collision member is B,
When the width of the side wall is C, the following relationship is satisfied: C <B ≦ 1.6 × C A <C <1.6 × A, the exit diameter of the acceleration tube is D, and the first exit from the exit of the acceleration tube is L1 is the length of the collision surface to the vertex, and L is the height of the first collision surface.
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: 0 <| L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 The method for producing a toner according to claim 17, wherein: 22. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and extending downstream. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and the angle θ is outward and downstream with respect to the long axis of the acceleration tube. (Degree), and a third side wall inclined at an angle (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member is A. B, when the width of the innermost edge of the third side wall is E, and the minimum width of the second side wall is C, A, B, C, D and E have the following relationship: C <B ≦ 2 × C 20. The relationship of A <C <1.6.times.A.sub.C> E is satisfied.
3. The method for producing a toner according to item 1. 23. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and extending downstream. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and the angle θ is outward and downstream with respect to the long axis of the acceleration tube. (Degree), and a third side wall inclined at an angle (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member is A. B, when the width of the innermost edge of the third side wall is E, and the minimum width of the second side wall is C, A, B, C, D and E have the following relationship: C <B ≦ 2 × C A <C <1.6 × A C > E is satisfied, the diameter of the exit of the acceleration tube is D, the length from the exit of the acceleration tube to the vertex of the first collision surface is L1, and the first is The height of the collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator tube is L4, and the height from the outermost edge of the second collision surface is L3. L1, L2, L3, L4 and L6, when the length up to the innermost edge of the side wall of L3 is L6, the following relationship is satisfied: | L1 | ≦ D / {2 × tan (α / 2)} L6 ≦ L4 19. The toner according to claim 17, wherein: ≦ L2 + L3 0 <L6 <2 × L3, and the inclination angle θ (°) of the third side wall satisfies the following relationship: 0 <θ <40. Production method. 24. A side wall of the crushing chamber, a first side wall upstream of an outermost edge of the second collision surface, a downstream side of the first side wall, and extending downstream. Second
And the first side wall and the second side wall are connected to each other, and are opposed to the outermost edge of the second collision surface, and the angle θ is outward and downstream with respect to the long axis of the acceleration tube. (Degree), and a third side wall inclined at an angle (degrees), wherein the width of the outermost edge of the second collision surface is A, and the maximum width of the front wall of the grinding chamber facing the collision member is A. B, when the width of the innermost edge of the third side wall is E, and the minimum width of the second side wall is C, A, B, C, D and E have the following relationship: C <B ≦ 2 × C A <C <1.6 × A C> E is satisfied, the diameter of the exit of the acceleration tube is D, the length from the exit of the acceleration tube to the vertex of the first collision surface is L1, and the first is The height of the collision surface is L
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator tube is L4, and the height from the outermost edge of the second collision surface is L3. When the length to the innermost edge of the side wall of L3 is L6, L1, L2, L3, L4 and L6 have the following relationship: 0 <| L1 | ≦ D / {2 × tan (α / 2)} L6 The method according to claim 17, wherein the following relationship is satisfied: ≦ L4 ≦ L2 + L3 0 <L6 <2 × L3, and 0 <θ <40. 25. The collision member comprises a first collision surface and a second collision surface.
The side opposite to the side where the collision surface is provided is a cone having an apex angle γ (°), the width of the outermost edge of the second collision surface is A, and the grinding chamber facing the collision member When the maximum width of the front wall is B and the minimum width of the second side wall is C, A, B and C have the following relationship: C <B ≦ 1.6 × C A <C <1.6 × A The method for producing a toner according to claim 17, wherein the toner is satisfied. 26. The collision member comprises a first collision surface and a second collision surface.
The side opposite to the side where the collision surface is provided is a cone having an apex angle γ (°), the width of the outermost edge of the second collision surface is A, and the grinding chamber facing the collision member When the maximum width of the front wall is B and the minimum width of the second side wall is C, A, B and C are in the following relationship: C <B ≦ 1.6 × C A <C <1.6 × A Satisfying the relationship, D is the exit diameter of the acceleration tube, L1 is the length from the exit of the acceleration tube to the vertex of the first collision surface, and L is the height of the first collision surface.
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: | L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3 When the width of the widest part from the bottom of the second side wall to the pulverized material discharge port is F, F and C satisfy the following relationship F> C, and the apex angle γ (° 20. The method according to claim 17, wherein the following condition is satisfied: 0 <γ <90. 27. The collision member comprises a first collision surface and a second collision surface.
The side opposite to the side where the collision surface is provided is a cone having an apex angle γ (°), the width of the outermost edge of the second collision surface is A, and the grinding chamber facing the collision member When the maximum width of the front wall is B and the minimum width of the second side wall is C, A, B and C are in the following relationship: C <B ≦ 1.6 × C A <C <1.6 × A Satisfying the relationship, D is the exit diameter of the acceleration tube, L1 is the length from the exit of the acceleration tube to the vertex of the first collision surface, and L is the height of the first collision surface.
2. The height of the second collision surface is L3, the length from the outermost edge of the second collision surface to the outlet of the accelerator is L4, and the length from the outlet of the accelerator to the second side wall is L4. When the length is L5, L1, L2, L3, L4 and L5 satisfy the following relationship: 0 <| L1 | ≦ D / {2 × tan (α / 2)} L5 ≦ L4 ≦ L2 + L3, When the width of the widest part from the lowermost part of the second side wall of the crushing chamber to the crushed material discharge port is F, F and C satisfy the following relationship F> C, and the apex angle γ of the collision member The method according to claim 17, wherein (°) satisfies the following relationship: 0 <γ <90. 28. The acceleration tube according to claim 17, wherein an inclination of the acceleration tube in a longitudinal direction of the acceleration tube is 0 to 45 ° with respect to a vertical line. A method for producing the toner described in the above. 29. The acceleration tube according to claim 17, wherein an inclination of the acceleration tube in a longitudinal direction of the acceleration tube with respect to a vertical line is 0 to 20 °. Production method of toner. 30. The acceleration tube according to claim 17, wherein the inclination of the acceleration tube in a major axis direction is 0 to 5 ° with respect to a vertical line, and the acceleration tube is installed substantially vertically. To 27
The method for producing a toner according to any one of the above. 31. The pulverizing chamber is downstream of the collision member and has a pulverized material discharge port for discharging pulverized material pulverized from the pulverization chamber behind the collision member. The method for producing a toner according to any one of claims 17 to 30, wherein: 32. The acceleration tube according to claim 17, wherein the acceleration tube has a material supply port for supplying a material to be ground into the acceleration tube from around the acceleration tube. A method for producing the toner described in the above.