JPH11188249A - Pressurized kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressurized kneader exhibiting a high kneading effect irrespectively of the quality of the materials to be kneaded in the pressurized kneader for kneading the highly viscous materials such as rubber and plastic under pressure. SOLUTION: The shaft of a parallel two-shaft rotor pierces the opposed two side walls of a mixing tank to be charged with the materials to be kneaded, and a pressurizing lid for pressurizing the inside of the mixing tank is freely liftably furnished in this pressurized kneader. In this case, three kneading blades 12, 13 and 14 are so arranged that a clearance is not formed between the blades 12, 13 and 14 or between the blades 12, 13 and 14 and the end faces 10 and 11 of the rotor rotating direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure type kneader for kneading a highly viscous material such as rubber and plastic under pressure.

[0002]

2. Description of the Related Art A pressure-type kneader is also called a dispersion-type kneader, and corresponds to a change in its volume from the start of mixing when powder or liquid as a raw material is charged into a mixing tank to the end of kneading where high-viscosity material is kneaded. However, since a predetermined pressure is constantly applied to the inside of the mixing tank, there is an advantage that the material is excellent in the effect of dispersing the material. In addition, the kneading tank is inverted, so that the inside can be easily cleaned. In general, a pressurized kneader has a smaller container size than a Banbury mixer or the like, and has a large occupied volume ratio of rotor blades in a mixing tank. Therefore, conventionally, almost two-bladed rotors have been used.

[0003]

However, in the case of a two-bladed rotor, when the material to be kneaded has a large variation in hardness and particle size, or in the case of a highly viscous liquid,
The homogeneity of the product quality after kneading is poor, and it may take a long time for kneading, and there is a demand for improved kneading effects. In view of the above, an object of the present invention is to provide a pressurized kneader that exhibits a high kneading effect regardless of the quality of the material to be kneaded.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

More specifically, a pressurizing type in which a shaft of a parallel twin-shaft rotor penetrates two opposing side walls of a mixing tank for accommodating materials to be kneaded, and a pressurizing lid for pressurizing the inside of the mixing tank is provided so as to be able to move up and down. In the kneader, each of the parallel biaxial rotors has three kneading blades, and there is no gap between the kneading blades or between the kneading blades and the rotor end face when viewed from the rotor rotation direction. .

Further, among the three kneading blades, the first kneading blade has one end which starts at one end face of the rotor and the other end which extends toward the other end face of the rotor, and which rotates to remove material. The second kneading blade has a one-stage or multi-stage inclination that can be transferred from the one end surface side to the other end surface side of the rotor, and one end of the second kneading blade starts at the other end surface of the rotor, and the other end is the one end surface of the rotor. The third kneading blade has a one-stage or multi-stage inclination capable of transferring the material from the other end surface side of the rotor to the one end surface side by rotation, and the third kneading blade is provided with the first kneading blade. Disposed between the second kneading blade, one end of which has a predetermined interval with the one end surface of the rotor, the other end has a predetermined interval with the other end surface of the rotor, from one stage or multi-stage It has a certain inclination.

[0007] The third kneading blade comprises a two-stage portion having one bending point, and one of the portions has a starting point in the direction opposite to the rotor rotation direction around the bending point,
Provided in a rotation range having an end point at a position rotated by 90 degrees in a direction away from the second kneading blade, the other step portion having the bending point as a center and a rotor rotation direction as a start point, The second stage is provided within a rotation range ending at a position close to the kneading blade until it becomes parallel to the kneading blade, and the angle of the other stage with respect to the direction of the rotor rotation axis is larger than that of the first stage.

Further, the third kneading blade comprises a two-stage portion having one bending point, and one of the portions has a starting point in the direction opposite to the rotor rotation direction around the bending point. Provided in a rotation range having an end point at a position rotated by 90 degrees in a direction away from the second kneading blade, and the other step portion has the bending point as a center and a start point in a direction opposite to the rotor rotation direction, It is provided within a rotation range ending at a position rotated by 90 degrees in a direction away from the first step, and further, an inner angle between the first step and the other step is less than 180 degrees.

[0009] The rotation speed of the parallel twin-shaft rotor may be mutually changed, or a mesh type in which the trajectories of the ridges of the kneading blades of the parallel twin-shaft rotor interfere with each other.

[0010]

Next, an embodiment of the present invention will be described. FIG. 1 is a partial sectional view of a front view of an embodiment of the present invention, and FIG.
1 is a plan view of the mixing tank of FIG. 1, FIG. 3 is an explanatory view showing the parallel twin-screw rotor of the present invention together, FIG. 4 to FIG. 9 are circumferential development views of the rotor in the mixing tank, and FIG. FIG. 17 is an explanatory view of a material flow by a rotor in a mixing tank, FIGS. 18 and 19 are cross-sectional views showing an example of a meshed state of a two-shaft rotor of the present invention,
FIG. 20 and FIG. 21 are development views showing the meshing relationship of the two-shaft rotor of the present invention by superimposing it on one rotor.

First, the overall structure of the pressurized kneader according to the present invention will be described with reference to FIGS. The mixing tank 1 containing the material to be kneaded has a rectangular opening on the upper surface, and the parallel two-axis rotor shafts 3 and 4 penetrate the opposed two side walls 2a and 2b. Are provided with kneading blades 5 and 6, respectively, and constitute rotors 8 and 9. The kneading blades 5 and 6 have the same shape and the same arrangement, and are mounted on the rotor shaft with one end and the other end of the rotor being opposite to each other. The arrow in FIG. 3 indicates the rotation direction of the rotor. Further, a pressure lid 7 is provided above and below the mixing tank 1 and controlled to be lifted and lowered by an air cylinder (not shown). After the material is charged, kneading is performed in a pressurized state.

The arrangement of the kneading blades in the pressurized kneader having the above-described overall configuration will be described with reference to FIGS. Each of the drawings is a view in which the rotor in the mixing tank 1 is developed in the circumferential direction, shows only the ridge line of the kneading blade, and omits a slope formed therearound. FIG.
The case where three kneading blades are used is shown. The kneading blades 12 and 14 overlap at 12a-12c (14a-14c), the kneading blades 13 and 14 overlap at 13a-13b (14a-14b), and one end of each kneading blade 12, 13, and 14 is a rotor end face. The configuration is such that there is no gap between the kneading blades or between the kneading blades and the rotor end face when viewed from the rotor rotation direction.

FIG. 5 shows an arrangement in which the kneading effect is further enhanced in the three-blade rotor as described above. That is, the first kneading blade 15 has one end 15a that starts at the one end face 10 of the rotor and the other end 15b that extends toward the other end face 11 of the rotor. Arrow 15 toward the other end surface 11 of the rotor
It has a single-stage or multi-stage (one-stage in this embodiment) inclination for transport along c. The second kneading blade 16 has one end 16a which starts at the other end face 11 of the rotor, and the other end 16b which extends toward the one end face 10 of the rotor, and rotates the rotor to rotate the other end face 11 of the rotor.
From one to the one end surface 10 of the rotor along the arrow 16c. The third kneading blade 17 is connected to the first kneading blade 17.
Is arranged between the kneading blade 15 and the second kneading blade 16, and one end 17a of the ridge line starts at a predetermined interval 17d from the other end surface 11 of the rotor and extends beyond the center of the rotor. The other end 17b of the ridge line ends at a predetermined interval 17e from the one end face 10 of the rotor, and the material is moved from the other end face 11 side of the rotor to the one end face 10 by the rotation of the rotor.
It has a single-stage or multi-stage (one-stage in this embodiment) inclination for transport along c.

Further, the effect of the shape of the third kneading blade on the kneading condition was examined in detail in the case where the third kneading blade had a two-stage portion, and as a result, the material was excellent in crushing and cutting of the material. It became clear that it can be classified into "high crush type" and "load reduction type" which can reduce the thrust force applied to the bearing of the rotor rotating shaft. Therefore, the “high crush type” will be described first with reference to FIGS. The third kneading blade 20 in FIG. 6 includes a two-stage portion having one bending point 20a. One of the steps 20a-20b is
A direction opposite to the rotor rotation direction around the bending point 20a.
0e as a starting point, and 9e in a direction away from the second kneading blade.
It is provided within a rotation range 20X whose end point is a position rotated by 0 degrees. On the other hand, the other steps 20a-20c
centering on a, the starting point is the direction 20d in the direction of rotor rotation,
It is provided within a rotation range 20Y whose end point is a position approached until it is parallel to the second kneading blade. Further, another step portion 2
Angle 2 of 0a-20c with respect to rotor rotation axis direction 20f
0Z, the rotor rotation axis direction 20 of the one-step portions 20a-20b.
The angle is larger than 20 W with respect to f. In FIG. 6, the inclination of the one-stage portions 20 a-20 b is set to be the same as that of the second kneading blade 19, that is, parallel to the second kneading blade 19, but under the above-mentioned conditions, various combinations according to the quality of the material to be kneaded may be made. It is possible to change the inclination of the first step 21a-21b to be different from that of the second kneading blade 26 as shown at 21 in FIG. 7, and also change the inclination of the other steps 21a-21c.

Next, the "load reduction type" will be described with reference to FIGS. The third kneading blade 24 in FIG.
Consists of a two-stage portion having one bending point 24a.
One of the steps 24a-24b is provided at the bending point 24a.
Centered on the rotation direction 24e and the reverse direction 24e as a starting point,
It is provided in a rotation range 24X whose end point is a position rotated 90 degrees in a direction away from the second kneading blade 23. The other step portions 24a to 24c have a starting point 24e in a direction opposite to the rotor rotation direction around the bending point 24a, and
It is provided in a rotation range 24Y whose end point is a position rotated by 90 degrees in a direction away from 4a-24b. Further, the inner angle 24Z between the first step 24a-24b and the other step 24a-24c.
Is less than 180 degrees. In FIG. 8, the one-stage portion 24a-
Although the inclination of 24b is set to be the same as that of the second kneading blade 23, that is, parallel to the second kneading blade 23, various combinations according to the quality of the material to be kneaded are possible under the above-described conditions. The second kneading blade 25 around the bending point 25a
The whole may be rotated, and there is no particular limitation. 6, 7, 8, and 9, the third kneading blades 20, 21, 24, and 25 have bending points 20a and 2
1a, 24a, and 25a are set to one, but a plurality of them are set, and the bending direction is set to the same side or the opposite side to the rotor rotation direction, and a third step having a multi-step inclination is set.
May be formed as a kneading blade.

Next, the flow of material and the effect of kneading when the kneading blades are arranged as described above will be described with reference to FIGS. The flow of the material is indicated by arrows. FIG. 10 shows the material flow by the three-blade rotor of the present invention, FIG. 16 shows the material flow by the conventional two-blade rotor, and FIG. 17 also shows the three-blade rotor from the rotor rotation direction. The flow of the material when there is a gap is shown.

By increasing the number of kneading blades from two to three, as shown in FIGS. 10 and 16, the frequency at which the material collides with and crushes the kneading blades is increased, and the homogenization of the material is promoted. However, as shown in FIG. 17, if there is a gap over the entire circumference even at one place between the other end face 11 of the rotor and the kneading blade, a coarse or high-viscosity material is formed only around the gap having low resistance to material flow. Unmixed ingredients are concentrated,
The crushing and distributing effects of the kneading blades cannot be sufficiently exhibited.

FIG. 11 shows the flow of materials when the kneading effect is further enhanced in the three-blade rotor of the present invention. The material is sent from one end 10 of the rotor to the other end 11 by the rotation of the first kneading blade 15, and then returned to the one end 10 by the rotation of the third kneading blade 17. 3 passes between one end 17a of the kneading blade 17 and the other end 11 of the rotor, and is diverted to the one 16F which is returned toward the one end 10 of the rotor by the rotation of the second kneading blade 16, and the diverted portion is the first. This is because the kneading blades 15 are joined by rotation. In this way, the material to be kneaded is effectively crushed and distributed, so that the homogenization proceeds quickly, and the heat transfer to the material to be kneaded is also uniformized and accelerated, so that the kneading time is shortened and the production is shortened. The performance is improved.

FIG. 12 shows the flow of materials in the high crush type. After the material is sent from one end 10 of the rotor to the other end 11 by the rotation of the first kneading blade 18,
Third kneading blades 20 arranged opposite to the material flow
Is effectively crushed and divided by the one end 20c. Thereafter, as in the case of FIG. 11, the second kneading blade 20 is returned to the one end 10 again by the rotation of the third kneading blade 20, between the bending point 20 a of the third kneading blade 20 and the other end 11 of the rotor. , And is diverted to the one 19F which is returned toward the one end 10 of the rotor by the rotation of the second kneading blade 19, and the diverted one is joined by the rotation of the first kneading blade 18. In this way, it is possible to more effectively achieve the crushing and cutting of the material to be kneaded, and it is possible to remarkably promote the homogenization of the material after kneading. FIG. 13 shows the flow of the material when the inclination of the one step portion is different from that of the second kneading blade and the inclination of the other step portion is also different from that of FIG. 12. Are arranged so as to be cut at an acute angle to the flow of the material as compared with the case of FIG. 12, so that the homogenization of the material by kneading is further improved.

FIG. 14 shows the flow of materials in the load reduction type. After the material is sent from one end 10 of the rotor to the other 11 by the rotation of the first kneading blade 22, the flow of the material is changed to the other steps 24a-24c and the one step 24.
It is divided into 24G and 24F of left and right flows along a-24b. As a result, the thrust force applied from only one of the steps 24a-24b is reduced.
This is largely offset by the thrust force applied from 24c, so that the load on the bearing can be reduced.
Thereafter, as in the case of FIG.
24F returned to one end 10 again by the rotation of
, Which passes between the bending point 24a of the third kneading blade 24 and the other end 11 of the rotor and is returned toward the one end 10 of the rotor by the rotation of the second kneading blade 23, and is diverted to the diverted portion 23F. Are joined by the rotation of the first kneading blade 22. FIG. 15 shows a case where the third kneading blade is rotated about a bending point. Third for material flow
The resistance of the kneading blade 25 is smaller in the large-area one-stage sections 25a-25b than in the case of FIG.
In the case of 5a-25c, the thrust force is offset more, and the load on the bearing is further reduced.

According to the present invention, as shown in FIG. 18, the trajectory 27 of the ridge of the kneading blade,
The present invention can be implemented by either a meshing type in which the 28s interfere with each other or a non-meshing type in which they do not interfere with each other as shown in FIG. In the case of the non-meshing type shown in FIG. 19, the two-shaft rotor can be rotationally driven so that the rotational speeds thereof are different from each other.

FIGS. 20 and 21 are exploded views showing the meshing relationship between the two shafts when the two shafts rotate at the same speed. One end face 10 of one rotor corresponds to the other end face of the other rotor, and the other end face 11 of one rotor corresponds to one end face of the other rotor.

[0023]

According to the present invention, since the material has excellent convection, efficient and rapid crushing and mixing of the material and uniform transmission of heat are performed, and as a result, the quality of the material to be kneaded is determined. Irrespective of this, homogenization, high dispersion, and short-time kneading of the kneaded material are possible. Further, by controlling the shape of the third kneading blade, the effect of crushing and separating the material can be further enhanced, and the load on the bearing during long-time use can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a front view of an embodiment of the present invention.

FIG. 2 is a plan view of the mixing tank 1 of FIG.

FIG. 3 is an operation explanatory view showing the parallel twin-shaft rotor of the present invention in a developed state.

FIG. 4 is a circumferential development view of the rotor of the present invention.

FIG. 5 is a circumferential development of the same kneading effect.

FIG. 6 is an example of a circumferentially expanded view of a further high crush type.

FIG. 7 is another example of a circumferentially developed view of the high crushing type.

FIG. 8 is an example of a circumferentially expanded view of the load reduction type.

FIG. 9 is another example of a circumferential development of the load reduction type.

FIG. 10 is an explanatory diagram of a material flow by the rotor of the present invention.

FIG. 11 is an explanatory diagram of a material flow of the same kneading effect.

FIG. 12 is an explanatory diagram of an example of a material flow of a further high crush type.

FIG. 13 is an explanatory view of another example of the material flow of the high crushing type.

FIG. 14 is an explanatory diagram of an example of a material flow of a load reduction type.

FIG. 15 is an explanatory diagram of another example of the material flow of the load reduction type.

FIG. 16 is an explanatory diagram of a material flow in a conventional two-bladed rotor.

FIG. 17 is an explanatory diagram of a material flow in a three-blade rotor other than the present invention.

FIG. 18 is a cross-sectional view showing an example of an engaged state of the two-shaft rotor of the present invention.

FIG. 19 is a cross-sectional view showing another example of the meshing state.

FIG. 20 is a developed view showing an example of the meshing relationship of the two-shaft rotor according to the present invention, which is superimposed on a single rotor.

FIG. 21 is an exploded view showing another example of the meshing relationship of the two-shaft rotor of the present invention by superimposing it on a single rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mixing tank 2a, 2b Side wall of mixing tank 3, 4 Rotor shaft 5, 6 Kneading blade 7 Pressure lid 8, 9 Rotor 10 One end face of rotor 11 The other end face of rotor 12, 13, 14 Kneading blade 15 First kneading Blade 16 Second kneading blade 17 Third kneading blade 20, 21 High crushing type third kneading blade 24, 25 Load reducing type third kneading blade

Claims (6)

[Claims] 1. A pressure type in which a shaft of a parallel twin-screw rotor penetrates two opposite side walls of a mixing vessel containing materials to be kneaded, and a pressure lid for pressurizing the inside of the mixing vessel is provided so as to be movable up and down. In the kneader, each of the parallel biaxial rotors has three kneading blades, and there is no gap between the kneading blades or between the kneading blades and the rotor end face when viewed from the rotor rotation direction. Pressurized kneader. 2. The first kneading blade of the three kneading blades has one end starting at one end of the rotor and the other end extending toward the other end of the rotor. The second kneading blade has a one-stage or multi-stage inclination that can be transferred from the one end surface side to the other end surface side of the rotor, and one end of the second kneading blade starts at the other end surface of the rotor, and the other end is the one end surface of the rotor. The third kneading blade has a one-stage or multi-stage inclination capable of transferring the material from the other end surface side of the rotor to the one end surface side by rotation, and the third kneading blade is provided with the first kneading blade. Disposed between the second kneading blade, one end of which has a predetermined interval with the one end surface of the rotor, the other end has a predetermined interval with the other end surface of the rotor, from one stage or multi-stage 2. The device according to claim 1, wherein: A pressurized kneader as described. 3. The third kneading blade comprises a two-stage portion having one bending point, and one of the portions has a starting point in the direction opposite to the rotor rotation direction around the bending point. , Provided in a rotation range ending at a position rotated 90 degrees in a direction away from the second kneading blade, the other step portion,
Provided within a rotation range centering on the bending point, starting from the direction of rotor rotation, and ending at a position close to the second kneading blade until it is parallel to the second kneading blade. 3. The pressure-type kneader according to claim 2, wherein the angle with respect to the axial direction is larger than the one-step portion. 4. The third kneading blade comprises a two-stage portion having one bending point, and one of the portions has a starting point in a direction opposite to the rotor rotation direction around the bending point. , Provided in a rotation range ending at a position rotated 90 degrees in a direction away from the second kneading blade, the other step portion,
With the bending point as the center, the rotation direction is set as a starting point in a direction opposite to the rotor rotation direction, and provided in a rotation range having a position rotated by 90 degrees in a direction away from the one-step part as an end point. 3. The pressurized kneader according to claim 2, wherein the inner angle with the portion is less than 180 degrees. 5. The pressurized kneader according to claim 1, wherein the rotation speeds of the parallel two-axis rotors are different from each other. 6. The pressure-type kneader according to claim 1, wherein the trajectories of the ridges of the kneading blades of the parallel twin-shaft rotor are interlocking types that interfere with each other.