JPS6147126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a continuous kneading device that continuously kneads materials while feeding them from a supply port to a discharge port by rotating biaxial rotors in different directions within a fixed container.

<Prior art> Conventional continuous kneading equipment of this type has two rotors whose distance between the axes is larger than the outer diameter of the rotor, or where the distance between the axes is smaller than the outer diameter of the rotor and the trajectories of the rotors intersect with each other. Even if they matched, the structure was such that the angular velocity of the rotor shaft and the circumferential velocity of the rotor were equal to each other. In the former case, the materials were kneaded mainly between the inner wall of the container and the rotor, and a relatively wide space was formed between the rotors, so this part hardly contributed to the kneading.
In the latter case, the greater the intersection of the two rotors' trajectories, the greater the contribution of this part to kneading, but the peaks or troughs of both rotors move in the same direction at approximately the same speed. Not enough mixing was done to ensure proper mixing.

<Object of the invention> The object of the present invention is to knead materials more fully and in a shorter time than conventional methods, so that the circumferential speed of the rotor is relatively different and the peaks change discontinuously along the axial direction. An object of the present invention is to provide a continuous kneading device.

<Structure of the Invention> The continuous kneading device of the present invention is a device in which biaxial rotors rotate in different directions within a fixed container, and a material input port is provided above one end of the container, and a material discharge port is provided at the other end of the container. Therefore, multiple spiral peaks with different numbers of threads are formed on the biaxial rotor, and when the outer diameters of the biaxial rotor are D ₁ and D ₂ , the distance A between the axes of the biaxial rotor is 1/ 2 (D ₁ + D ₂ ), the ratio of the rotational speed of the biaxial rotor is the reciprocal of the ratio of the number of threads, and the crests of the biaxial rotor are in the winding direction of the crests at each corresponding position in the rotor axial direction. are opposite to each other, the change in the lead angle of the helix is the same, and at least one of the change in the phase of the peak and the change in the lead angle is formed discontinuously at one or more locations in the rotor axial direction. .

<Example> Fig. 1 shows a partial sectional view of the front view of an embodiment of the present invention, and Fig. 2 shows a partial sectional view of the plan view.
Figure 3 shows a side view. FIG. 4 is an explanatory diagram of the operation. 5 to 7 are partial sectional views of plan views showing other embodiments.

Container 1 is parallel to each other and connected horizontally to 2
It consists of a book cylinder, with a material input port 2 closed above one end and a discharge port 3 provided below the other end. Two rotor shafts 4A, 4B parallel to each other pass through the two cylinders, both ends of which are supported by bearings 5A, 5B and 6A, 6B, and a gear provided at one end of the rotor shafts 4A, 4B. 7A,
7B are engaged with each other and are driven to rotate in different directions by motors (not shown).

Multi-spiral ridges 8A, 8B are formed on the inside of the container 1 of the rotor shafts 4A, 4B to knead the material while transporting the material, and the winding direction of the ridges is different from that on the same cross section. They are in opposite directions, and the number of ridges is different from each other; in the embodiment, the first rotor 9A has three ridges, and the second rotor 9B has four ridges. Therefore, the cross-sectional shape of an arbitrary cross section is such that the first rotor 9A has three peaks equally spaced on the circumference, as illustrated in each figure in FIG. A second rotor 9 with four peaks
B is provided with a constant distance A between the axes,
When the outer diameters of the biaxial rotors 9A and 9B are D ₁ and D ₂ , and the diameters of the valleys formed between the crests are d ₁ and d ₂ , the distance A between the shafts is 1/2 (D ₁ + D ₂ ), the trajectories of the outer diameters D ₁ and D ₂ intersect with each other, and the center distance A is either 1/2 (d ₁ + D ₂ ) or 1/2 (D ₁ + d ₂ ). slightly larger than

The phase relationship between the two rotors 9A and 9B is such that when the peaks of one rotor are on the center line connecting the axes, the valleys of the other rotor are on the center line and they are close to each other (Figure b), and the rotors 9A and 9B are close to each other. While rotor 9B rotates 1/6, rotor 9B rotates 1/8, so when the valley of one rotor comes to the center line that connects the axes, the peak of the other rotor comes to the center line and they rotate together. They will face each other closely, and this relationship is shown in Figure 4 a, b, c.
Both rotors 9 change continuously as shown in
A and 9B can rotate without interfering with each other.

The ratio of the number of teeth between the gear 7A and the gear 7B is equal to the helix ratio of the rotor, which is 4:3 in the embodiment. As a result, the angular velocity ratio of the rotor shaft becomes a reciprocal of the multi-row ratio, and while the rotor 9A, which has four threads, rotates 1/4, the rotor 9B, which has three threads, rotates 1/3. In addition to 3:4, multi-rows are 2:3, 2:4, and 3:
5, any ratio can be used.

To explain the formation of the ridges 8A and 8B, in order to prevent the two rotors 9A and 9B from coming into contact, the ridges 8A and 8B of both the rotors 9A and 9B are arranged so that the winding direction is opposite to each other at the corresponding positions in the axial direction. At the same time, the change in the advance angle of the mountain spiral is the same for both rotors 9A and 9B. Given this condition,
The peaks 8A, 8B are discontinuously formed at one or more locations in the axial direction of the rotors 9A, 9B. In the examples shown in FIGS. 1 and 2, there are two discontinuous points indicated by the symbols . And the mode of discontinuity is mountain 8A, 8
This is a discontinuity in the phase of B. In this case, the phase shift at the discontinuous portion is
Mountains 8A and 8B are the same amount in mountains 8A and 8B.
prevent contact with By discontinuously shifting the phase of the peaks 8A and 8B in this way, the material can be
This produces a kneading effect in which the ridges 8A and 8B are forcibly separated on both sides. In the example shown in FIG. 5, they are formed discontinuously at the positions indicated by symbols. However, in this case, unlike the previous example, the change in the leading angle of the helix is discontinuous. That is, in this example, the advance angle changes from positive to negative at the discontinuous portion.
This means that in the region between and in the moving direction P of the material, a resistance or pushing back effect occurs that tries to move the material in the opposite direction (opposite to the P direction). Therefore, although the material as a whole is kneaded while moving in the P direction, the movement is confused in the region between the two, increasing the kneading effect.

In the example shown in FIG. 6, the phases of peaks 8A and 8B are discontinuous at three locations indicated by symbols , , . According to this example, the material is repeatedly divided in sequence at three locations, increasing the kneading effect.

In the example shown in Fig. 7, the numbers are 8A and 8B.
This is an example in which the phase of is made discontinuous and the change in advance angle is made discontinuous at the point of sign . That is, in this example, the material is divided at the discontinuous portion, and the advance angle is reversed in the region between the discontinuous portions, causing confusion in the feeding of the material and increasing the kneading effect. Note that the number of discontinuous points, the order of combinations of phase discontinuities and lead angle change discontinuities, etc. can be configured in various ways other than those shown in the drawings.
Of course, phase discontinuity and advance angle change may occur at the same location.

The discharge port 3 of the present invention may be provided below the other end of the rotor, or may be provided at the rear end of the rotor. Moreover, other conventionally known rotors can be used in combination before and after the rotor of the present invention.

<Effects of the Invention> According to the present invention, since the circumferential speeds of the two-shaft rotors are different, the kneading efficiency is improved compared to the conventional device in which the circumferential speeds are the same, and the same kneading effect as the conventional device can be obtained in a short time. be able to. Therefore, the effect is particularly great when the kneading time is limited, such as in a continuous kneader.

Further, according to the present invention, since the distance A between the shafts of the two-shaft rotor is smaller than the sum of the radii of the crests of the rotor, and the trajectories of the outer diameters intersect, the ridges facing each other on the center line connecting the shaft centers This is due to the fact that the and valleys are close to each other, the space formed above and below the center line is divided into two at the closest point on the center line, and there is a difference in the circumferential speed of both rotors. At one moment, the upper space is wide and the lower space is narrow, but at the next moment, the upper space is narrow and the lower space is wide, and there is an extremely narrow bottleneck between the two spaces. The material is repeatedly compressed and sheared to improve the kneading effect.

In addition to the above-mentioned effects, the present invention has a configuration in which the phase of the mountain is discontinuous in the middle of the rotor, or the change in advance angle is discontinuous, so that the material can be mixed while being transferred. It is possible to further improve the kneading effect by dividing and merging the materials, or to improve the efficiency of material kneading by pushing back the material during transport.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a front view showing an embodiment of the present invention, Fig. 2 is a partial sectional view of a plan view showing an embodiment of the invention, Fig. 3 is a side view of the above embodiment, and Fig. 4 is a partial sectional view of the above embodiment. FIG. 3 is an explanatory diagram of the operation of the embodiment. 5 to 7 are plan views of main parts showing other embodiments. 1...Fixed container, 2...Material input port, 3...Material discharge port, 4A, 4B...Rotor shaft, 8A, 8B
...Mountain, 9A, 9B...Rotor,,......
...Discontinuous part.

Claims (1)

[Claims] 1 A device in which two-shaft rotors rotate in different directions inside a fixed container, and a material input port is provided above one end of the container, and a material discharge port is provided at the other end, and the two-shaft rotor has a number of threads. Multiple helical ridges different from each other are formed, and the outer diameter of the above-mentioned biaxial rotor is D ₁ ,
D ₂ , and the valley diameters are d ₁ and d ₂ , and the distance A between the shafts of the two-axis rotor is smaller than 1/2 (D ₁ + D ₂ ) and 1/2 (d 1 + D ₂ ).
D ₂ ) or 1/2 (D ₁ + d ₂ ), the ratio of the rotational speed of the two-shaft rotor is the reciprocal of the ratio of the number of threads, and the ridges of the two-shaft rotor are The winding directions of the crests at corresponding positions are opposite to each other, the change in the lead angle of the helix is the same, and at least one of the phase of the crest and the change in the lead angle is discontinuous at one or more locations in the rotor axial direction. A continuous kneading device characterized in that: