JPH0753927B2 - Random web manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for producing a random web in which fibers used in a non-woven fabric or the like have random directions.

SUMMARY OF THE INVENTION The present invention provides an apparatus for producing a random web in which two cylinders are arranged close to each other and the fiber material wound around one cylinder is transferred to the other cylinder at these nip points. Along with the fiber guide plate along with, the fiber material is moved from one cylinder to the other cylinder by the high-speed air flow generating means to randomize the directionality of the fibers of the web and to increase the strength in the longitudinal and transverse directions of the web. It is intended to equalize and uniformize the fiber density.

[Prior Art] As a conventional random web manufacturing apparatus, one shown in FIG. 5 is known.

In this figure, the fiber material 2 is conveyed by a supply roll F, and the fibers are unraveled by an opening roller T and supplied to the first cylinder S ₁ . The first cylinder S ₁ , the fourth cylinder S _4, and the seventh cylinder S ₇ are linearly arranged at a predetermined interval, and between them, the second and fifth cylinders S ₂ , S are located above and below, respectively.
₅ and 3rd and 6th cylinders S ₃ and S ₆ are provided, and they are arranged in a bales stack as a whole.

These first to seventh cylinder S ₁ to S ₇ are together rotated at a high speed in the same direction, a number of needles S _1a to S _7a curved in the rotation direction is formed on its peripheral surface.

Moreover, these first to seventh cylinder S ₁ periphery a a in part of fibrous material 2 is wound in to S ₇ are fiber guide plates 7 and 8 is provided along the cylinder.

Therefore, the fiber material 2 wound around the first cylinder S ₁
Together are blown into the air flow generated by high speed rotation of the first cylinder S _1, the first cylinder S ₁ and the second cylinder
Needle S _1a which face each other in S _2, approximately half of the fiber material 2 by S _2a is migrated to the second cylinder S _2, and the remaining approximately half the process proceeds to the third cylinder S ₃ in the same manner. Similarly, the third cylinder S ₃
And the fiber material wound around the second cylinder S ₂ moves to the fourth cylinder S ₄ . 5th, 6th and 7th cylinders
Repeating with S ₅ , S ₆ and S ₇ , the fiber material becomes substantially random and is accumulated on the doffer drums D ₁ and D ₂ rotating at a slow speed to be a web 14 and discharged from between the discharge rollers 4 and 4.

As another random web manufacturing apparatus, one shown in FIG. 6 is known. In this figure, the supply roller F delivers the fiber material 2 to the first cylinder S ₁ with a slow rotation. Again fibrous material 2 wound around the first cylinder S ₁ by carding the fibers protruding through the first stripper roller ST ₁ and the first Walker roller ST ₂ which are arranged in the first cylinder S ₁ above the Move to 1 cylinder S ₁ . The second to fourth cylinders S _{2 to} S ₄ are located close to the first cylinder S _1.
There are arranged in series, these second to fourth cylinders S ₂ to S ₄ wherein the upper and the second to fourth stripper roller ST ₂ ~ST ₄ respectively similarly the second to fourth Walker roller W ₂ to W- ₄ are arranged.

A mesh-like punching conveyor 15 is arranged below each of the first to fourth cylinders S _{1 to} S ₄ . Below the punch conveyer 15, below the closest nip point K of the _first to fourth cylinders S _{1 to} S _4, an air suction device 9 is arranged, and above that, an air supply passage is formed. Has been done.

Then, the fiber material 2 wound around the first cylinder S ₁ moves while being carded to the second cylinder S ₂ . A part of the moving fiber material 2 is sucked by the air suction device 9 and sucked onto the upper surface of the punching conveyor 15. Similarly gradually adsorbed on the punching conveyor 15 the upper surface by the air suction device 9 provided at each nip point K below the second to fourth cylinders S ₂ to S _4, the last remaining fiber material fourth cylinder S ₄ And 4th stripper roller ST ₄・ 4th walker roller W ₄
After being carded by, it is sucked by the air suction device 9,
It is stacked on the upper surface of the punching conveyor 15.

[Problems to be Solved by the Invention] However, in the former conventional example, that is, when the fiber material is delivered by a needle provided on two cylinders and a needle and the fiber material is blown off by an air current accompanying high-speed rotation of the cylinder, In a device that uses delivery, the density of the produced web is uniform and the quality is improved, but due to the action of stroking the needle during delivery of the fiber material, the fibers of the web are inevitably oriented. , Can't have a web with completely random fiber orientation. As a result, when a non-woven fabric is manufactured using the web 14, there arises a problem that the strengths in the vertical and horizontal directions are different.

Further, in the other conventional example of the latter, that is, in the one in which the fiber material is laminated on the upper surface of the net-like punching conveyor 15 by the air suction device, the direction of the fibers is substantially random, but the first of the air suction device 9 is used. ~ It is difficult to equalize the suction forces in the axial direction of the fourth cylinders S _{1 to} S ₄ , so that the density becomes uneven in the width direction of the web 14. Therefore, when a nonwoven fabric is manufactured from this web, there is a problem in that the quality is deteriorated due to uneven density.

Therefore, an object of the present invention is to provide a random web manufacturing apparatus that solves the above problems.

[Means for Solving the Problem] The structure of the present invention for achieving such an object is such that two cylinders that rotate at the same time in the same direction at a high speed and that have needles curved in the rotation direction are formed on the peripheral surface of the cylinders. Place and
In the manufacturing device of the random web in which the fiber material wound around one cylinder in the vicinity of the nip point where these cylinders are closest to each other is transferred to the other cylinder and wound.
A fiber guide plate is provided from the outer circumference of one cylinder near the nip point to the outer circumference of the other cylinder, and the nip in the rotation direction of the other cylinder is on the nip point passage side of the one cylinder in the rotation direction. An air suction passage is provided in the vicinity of the nip point of the fiber guide plate on the point entry side, and air is sucked from the air suction passage to move the nip point in the same direction as the rotation direction of the one cylinder and in the other side. The present invention is characterized in that a high-speed airflow generating means for generating a high-speed airflow that passes the fiber material, which has passed through the cylinder in the direction opposite to the rotational direction of the cylinder and is retained in the one cylinder, to the other cylinder, is provided.

[Operation] When one cylinder rotates at high speed, an air flow is generated between the cylinder and the fiber guide plate, and the fiber material floating from the tooth tip of the needle of the one cylinder is moved to the nip point by the air flow. The fiber material carried on this air flow and the fiber material held on the tooth tip of the needle of one cylinder are blown away by the high speed air flow generated by the high speed air flow generation means and passing through the nip point, and the fiber material of the other cylinder is blown away. Held in the teeth. At this time, since the two cylinders rotate in the same direction and curve in the same direction, the teeth of one of the cylinders in the vicinity of the nip point are in the direction of catching the blown fiber material (hereinafter, the tooth working direction). However, since the other cylinder is in the tooth working direction, the fiber material is held in the teeth of the other cylinder in a random orientation.

Further, the fiber material held at the bottom of the teeth of one cylinder also floats on the tooth tip by the high-speed airflow of the high-speed airflow generation means, and part or all of it is blown off by the high-speed airflow and transferred to the needle of the other cylinder. To do.

The transfer of the fibrous material is not only blown away by the high-speed airflow of the high-speed airflow generating means, but also the teeth are transferred between the cylinders, so that the fibrous material transferred to the other cylinder has a uniform density.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, a random web manufacturing apparatus 1 includes two pairs of supply rollers F _{1 to} F ₄ and an auxiliary roller F ₅ for supplying a fiber material 2.
Is equipped with. Preliminary Hirakiwata roller T is arranged at the feed roller and the predetermined clearance with respect to the auxiliary rollers F ₁ to F _5. The preliminary cotton opening roller T rotates counterclockwise in the figure, and a needle Ta curved in the rotational direction is formed on the peripheral surface thereof. The preliminary Hirakiwata roller T is stretched draw thin fiber material 2 supplied by the supply roller and the auxiliary roller F ₁ to F _5, it is intended to facilitate carding in about after the next. A main cylinder S _{1 having} a large diameter near the preliminary opening roller T
Has been placed. The main cylinder S ₁ rotates at a high speed in a direction opposite to the preliminary cotton-opening roller T, that is, clockwise, and has a needle S _1a curved in the same direction as the rotation direction on its peripheral surface.

Therefore, the pre-opened fiber material 2 is transferred to the main cylinder S ₁ by the transfer action of the needles Ta and S _1a and wound around the main cylinder S ₁ .

Around the main cylinder S ₁ , six pairs of first to sixth stripper rollers ST _{1 to} ST ₆ and first to _sixth walker rollers W _{1 are provided.}
~ W ₆ are provided close to each other. This 1st
The sixth stripper rollers ST _{1 to} ST ₆ rotate counterclockwise at a high speed, though not as fast as the main cylinder S ₁ , but
Needles ST _{1a to} ST _6a curved in the same direction as the direction of rotation
Is formed. The first to sixth walker rollers W ₁ to
W ₆ rotates counterclockwise at a low speed, and a needle curved in a clockwise direction, which is opposite to the rotation direction, is formed on the peripheral surface of W ₆ . The non-uniform fiber material 2 wound around the main cylinder S ₁ moves between the first stripper roller ST ₁ and the first walker roller W ₁ while being sandwiched between the first stripper roller ST ₁ . The protruding portion of the non-uniform fiber material 2 (abbreviation of the fiber material 2
(About 2/3) moves to the walker roller W ₁ at this time,
The needles S _1a and W _{1a of the} main cylinder S ₁ and the first walker roller W ₁ are carded. The carded fiber material 2 is wound around the first walker roller W ₁ and moves, and then moves to the first stripper roller ST ₁ . The fiber material 2 wound around the first stripper roller ST ₁ by a predetermined angle is rewound around the main cylinder S ₁ and moved to a predetermined angle, and the second stripper roller ST ₂ and the second stripper roller ST _{2 are} moved.
The projecting portion is carded by the walker roller W ₂ . In this way, the fiber material 2 is wound around the main cylinder S ₁ and moved, and the third to sixth stripper rollers ST _{3 to} S 3 are moved.
Its density becomes substantially uniform protruding portion at T ₄ · Walker roller W ₁ to _W-6 is carding.

A sub-cylinder which extends on a peripheral surface of the main cylinder S ₁ and is adjacent to the sixth walker roller W _{6 by} a predetermined distance.
S ₂ is provided. The sub-cylinder S ₂ has a smaller diameter than the main cylinder S _{1 and} rotates in the same rotation direction, that is, clockwise, and has a needle S _2a curved in the same direction as the rotation direction on its peripheral surface. A doffer drum D ₀ is arranged close to the sub cylinder S ₂ . This doffer drum D ₀ is in the opposite direction to the sub-cylinder S ₂ , that is,
The needle D _0a is rotated counterclockwise at a low speed, and a curved needle D _0a is formed on the peripheral surface of the needle D _0a . A laminating roller C is arranged adjacent to the doffer drum D _0a . The laminating roller C rotates clockwise at a lower speed than the doffer drum D ₀ , and a ridge Ca having a mountain-shaped cross-section protruding radially is formed on the peripheral surface thereof. Adjacent to the laminating roller C, the peeling roller 3 and a pair of discharge rollers 4, 4
Are arranged. A discharge conveyor 5 is provided on the lower surfaces of the pair of discharge rollers 4.

The preliminary opening roller T and 6 pairs of stripper rollers
A casing 6 is provided on the outer circumferences of ST _{1 to} ST ₆ and walker rollers W _{1 to} W ₆ so as to surround them.

Further, in the portion where the fiber material 2 of the sixth walker roller W ₆ and the sub-cylinder S ₂ and the doffer drum moves, the upper portions are formed along the shapes of the cylinders S ₁ and S _2, the sixth walker roller W ₆ and the doffer drum D _0. A fiber guide plate 7 is provided.

Similarly, a lower fiber guide plate 8 is also provided on the lower surfaces of the preliminary unrolling roller T and the main cylinder S ₁ and the sub cylinder S ₂ along these shapes.

In the vicinity of the nip point K between the main cylinder S ₁ and the sub-cylinder S ₂ and in the lower common tangential direction, there is provided an air suction device 9 as a high-speed airflow generating means. An air suction passage 10 is formed in the lower fiber guide plate 8 in the vicinity of the nip point K between the air suction device 9 and the main cylinder S ₁ and the sub cylinder S ₂ .

Next, the operation of the above embodiment will be described.

1 and 2, the main cylinder S ₁ and the first cylinder
~ The sixth stripper rollers ST _{1 to} ST ₆ and the first to sixth walker rollers W _{1 to} W ₆ carded the fiber material 2 guided by the upper fiber guide plate 7 from the main cylinder S ₁ to the sub-cylinder. Move to S ₂ . At this time, since the main cylinder S ₁ rotates at a high speed, an air flow is generated between the main cylinder S ₁ and the upper fiber guide plate 7, and the floating air flows by the air flow.

Further, the air suction device 9 generates a high-speed airflow passing through the nip point K between the main cylinder S ₁ and the sub cylinder S ₂ . Then, the tooth top of the needle S _1a of the main cylinder S ₁
The fibers suspended between the fibers held in 11 and the upper fiber guide plate 7 and flown into the air flow h are blown off to the outer periphery of the sub cylinder S ₂ by the high speed air flow,
The fibers held on the tooth root 12 of the needle _1a of S ₁ float up on the tooth tip 11. As shown in FIG. 2, the main cylinder S ₁
The direction of the needle S _1a of the sub-cylinder S ₂ is not the working direction, and the direction of the needle S _2a of the sub-cylinder S ₂ is the working direction. Therefore, the fiber raw material 2 that has floated from the root 12 of the May cylinder S _{1 to the} tooth top 11 is the sub-cylinder.
It will be migrated to the needle S _2a of S _2.

Next, a second embodiment of the present invention will be described with reference to FIG.

This embodiment has substantially the same structure as the above-mentioned embodiment, except that the first and second two sub-cylinders S ₂ and S ₃ are arranged close to the main cylinder S ₁ .

The first and second doffer drums D _o1 and D _o2 are close to the first and second two sub-cylinders S ₂ and S ₃ , respectively. The first and second doffer drums D _o1 and D _o2 are provided with the first and second laminating rollers C ₁ and C ₂ , the peeling roller 3, the pair of discharge rollers 4 and 4 and the discharge conveyor 5, respectively, as in the above embodiment. They are arranged sequentially.

Further, above the main cylinder S ₁ and the first sub-cylinder S ₂ , the fifth walker roller W ₅ , the main cylinder S ₁ ,
A first upper fiber guide plate 7 is arranged along the outer circumference of the first sub-cylinder S ₂ and the first doffer roller D _o1 . The lower surfaces of the main cylinder S ₁ and the first sub-cylinder S ₂ are also provided with a first lower fiber guide plate 8 along these shapes. A first air suction device 9 is provided on the lower surface of the first lower fiber guide plate 8, and an air suction passage 10 communicating with the first air suction device 9 is formed in the first lower fiber guide plate 8. . The air suction passage 10 is formed in a common tangential direction passing through the nip point K of the main cylinder S ₁ and the first sub cylinder S ₂ .

A second upper guide plate 7 is similarly provided on the upper side of the second sub-cylinder S ₃ , the main cylinder S ₁ , and the second doffer drum D _o2 , and a lower second fiber guide plate 8 and a second air suction plate are provided on the lower side. A device 9 is provided.

According to this embodiment, substantially half Gras fiber material 2 which has been carded in the main cylinder S ₁ is, airflow and the main cylinder S ₁ by the high-speed rotation of the main cylinder S ₁ and the first sub-cylinder
By the transfer of the needles S _1a and S _2a with S ₂ and the blowout by the high-speed airflow of the first air suction device 9,
The fibers move to the first sub-cylinder S ₂ in a random direction and are laminated on the first doffer drum D _o1 . This first
Web 14 accumulated in doffer drum D _o1 is the first
It is accumulated by the laminating roller C ₁ and becomes a web 14 having a predetermined basis weight and is discharged by the discharge roller 4 and the discharge conveyor 5. As in the first embodiment, the discharged web 14 also has random fiber directions and a uniform density.

The half of the fiber raw material 2 left in the main cylinder S ₁ is transferred to the second sub-cylinder S ₃ by the second lower fiber guide plate 8 and the second air suction device 9 as in the above, and the second doffer drum D _o2 · second laminating roller C ₂ · second discharge rollers 4
A web 14 having a predetermined thickness, random fiber directions, and uniform density is discharged through the second discharge conveyor 5.

Next, a third embodiment of the present invention will be described with reference to FIG.

This embodiment has substantially the same configuration as that of the first embodiment, and the same components are designated by the same reference numerals and the description thereof will be omitted.

In Figure 4, the web 14 wound around the sub-cylinder S ₂ is laminated to the first and second Doffadoramu D _o1, D _o2 which are closely arranged respectively at predetermined intervals in the sub-cylinder S _2. On the first and second doffer drums D _o1 and D _o2 , first and second stacking rollers C ₁ and C ₂ , first and second discharge rollers 4 and 4 and discharge conveyors 5 and 5 are sequentially arranged. The web 14, which is wound around the first and second doffer drums D _o1 and D _o2 in approximately half, is further laminated to a predetermined thickness by the _first and second laminating rollers C ₁ and C _{2, and then} by the ejection roller 4 and the ejection conveyor 5. Is discharged.

[Effects of the Invention] As can be seen from the above description, the random fiber manufacturing apparatus according to the present invention has the effects that the direction of the fibers of the manufactured web is random and that the density can be made uniform.

Therefore, when a nonwoven fabric is manufactured from this web, there is an effect that the strengths in the length and width can be made substantially the same.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention,
FIG. 1 is a side view of a random web manufacturing apparatus, FIG. 2 is a partial side view showing the principle, FIG. 3 is a side view of a random web manufacturing apparatus showing a second embodiment, and FIG. FIG. 5 is a side view of a random web manufacturing apparatus showing an embodiment, FIG. 5 is a side view of a random web manufacturing apparatus showing a conventional example, and FIG. 6 is another embodiment showing a random web manufacturing apparatus. Side view. 1 ... Random web manufacturing device, 2 ... Textile material, S ₁ , S
₂ , S ₃ ...... Cylinder, S _1a , S _2a , S _3a ...... Needle, 7,8 ...... Fiber guide plate ...... High speed air flow, 9 ...... High speed air flow generation means (air suction device), 14 ...... web.

Claims (1)

[Claims] 1. Two cylinders, each of which rotates in the same direction at a high speed and has needles curved in the rotational direction formed on its peripheral surface, are arranged in proximity to each other, and one cylinder is provided in the vicinity of a nip point where these cylinders are closest to each other. In a manufacturing apparatus for a random web in which the wound fiber material is transferred to the other cylinder and wound, a fiber guide plate is provided along the outer circumference of one cylinder near the nip point along the outer circumference of the other cylinder, and An air suction passage is provided in the vicinity of the nip point of the fiber guide plate on the nip point passage side of the rotation direction of one cylinder and on the nip point entry side of the rotation direction of the other cylinder, and air suction passage is provided from this air suction passage. And passes through the nip point in the same direction as the rotation direction of the one cylinder and in the opposite direction to the rotation direction of the other cylinder. Square random web manufacturing apparatus of fiber material retained on the cylinder, characterized in that a high-speed air stream generating means for generating a high-speed air stream to shift to the other cylinders of.