JPH1076150A - Dust stop of pressurizing kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the wear of sealing parts and to prevent the leakage of materials to be kneaded by providing the annular surface of a rotor or the inside wall surface of a vessel with plural projections spaced from each other around its axial line in a tangent direction. SOLUTION: Either of the annular surface of the rotor 1 or the inside wall surface of the vessel 3 is provided with the plural projections 3' spaced from each other around its axial in a tangent direction. When the rotor 1 of the dust stop of such pressurizing kneader 1 rotates, the pasty raw materials intruding between the annular surface of the rotor 1 and the inside wall surface of the vessel 3 are pressed to the respective projections 3' and are extruded in a radial direction. The pasty raw materials are therefore, admitted between a sealing member 4 and a sealing plate and the wear of the sealing member 4 is suppressed. The pasty raw materials fill the spacing between the annular surface of the rotor 1 and the inside wall surface of the vessel 3 and the pressure in the part rises high. The spacing of the sealing member 4 and the sealing plate does not arise and the leakage of the raw materials is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dust stop for a pressure kneader.

[0002]

2. Description of the Related Art A conventional pressure kneader will be described with reference to FIG. 4. Reference numerals 1 and 2 denote a pair of rotors having projections 1 'and 2' formed on the outer peripheral surface of a rotor body. An annular surface perpendicular to the axis is formed therebetween. Reference numeral 3 denotes a container, and the container 3 has the rotors 1 and 2 rotatably supported by the shafts at both ends, and the inner wall surface of the container faces the annular surface.

[0003] When kneading a material to be a raw material of rubber, the rotors 1 and 2 are rotated in the directions indicated by arrows A and A (opposite direction), and a material to be used as a raw material of rubber is mixed between the rotors 1 and 2 and the container 3. Put it in the space between, knead it,
I try to get the product rubber. The shafts at both ends of the rotors 1 and 2 pass through the shaft support holes of the container 3, and a bearing and a driving gear (neither is shown) are provided outside the container 3.

[0004] A dust stop shown in FIG. 5 is provided in the shaft penetrating portion so that the rubber raw material does not leak out of the container 3. The dust stop includes a seal member 4 having lubricity, a seal plate 5 embedded in an annular surface of the rotor 1 (and 2) (an annular surface formed between the rotor body and both end shafts), A sleeve 6 for supporting
It comprises a spring support member 8 fixed to the outer wall surface of the container 3 and a spring 7 interposed between the spring support member 8 and the sleeve 6. The spring 7 moves the sleeve 6 and the seal member 4 in the direction of the seal plate 5. The seal member 4 is pressed against the seal plate 5 and slid while keeping the seal member 4 in close contact with the seal plate 5 rotating together with the rotors 1 and 2, so that the rubber raw material is discharged out of the container 3. We try to prevent leakage.

[0005]

The conventional dust stop shown in FIG. 5 has a problem that the seal member 4 is worn away at an early stage and that the rubber material leaks out of the container 3. That is, when the pressing force of the seal member 4 is increased to improve the adhesion between the seal member 4 and the seal plate 5, the wear rate of the seal member 4 increases, and the wear of the seal member 4 is suppressed. When the pressing force of the sealing member 4 is reduced,
The adhesion between the seal member 4 and the seal plate 5 is reduced, and the rubber and its raw material are
Leaks from between.

[0008] The state of the gap between the annular surface of the rotor 1 (the annular surface formed between the rotor body and the shafts at both ends) and the inner wall surface of the container 3 is observed from the input of the raw materials to the kneading of the rubber of the product. As a result, the raw material enters the gap in paste like viscosity and sticks together, is stretched,
Is repeated, and in the portion where the paste-like raw material is crushed, the pressure is locally as high as several tens kgf / cm ² . At this time, the pressure of the paste-like raw material exceeds the pressing force of the sealing member 4, and the paste-like raw material pushes and spreads between the sealing member 4 and the seal plate 5,
It became clear that rubber and its raw material leaked from between the seal member 4 and the seal plate 5.

Therefore, it is necessary to keep the paste-like raw material away from the seal member 4 so that the periphery of the seal member 4 is always in a state of a space, thereby suppressing the wear of the seal member 4. The present invention has been made in view of the above problems, and has as its object to provide a dust stop of a pressure kneader capable of suppressing abrasion of a sealing member and preventing leakage of a material to be kneaded. It is in.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an annular structure in which a projection is formed on an outer peripheral surface of a rotor body and a rotor body and both end shafts are orthogonal to an axis. A pair of rotors forming surfaces, and a container whose inner wall surface is rotatably supported by the shafts at both ends and has a container inner wall surface facing the annular surface, and rotating the rotors in opposite directions, In a pressure kneader in which the material to be kneaded is put into the space between each of the rotors and the container and kneaded, a plurality of protrusions are formed on one of the annular surface of each rotor and the inner wall surface of the container. It is provided in the tangential direction with a space around it (claim 1).

In the dust stop of the pressure kneader according to claim 1, a ring-shaped member having the protrusion on one of the annular surface of each rotor and the inner wall surface of the container is provided concentrically with respect to the axis. Good (claim 2). The dust stop of the pressure kneader according to claim 1 or 2,
A ring-shaped member having the protrusion is provided on one of the annular surface of each rotor and the inner wall surface of the container so as to be concentric with the axis and movable in the axial direction. (Claim 3).

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Next, the dust stop of the pressure kneader of the present invention will be described with reference to the first embodiment shown in FIG.
Denotes a rotor, and the other rotor (see 2 in FIG. 4) is not shown. Reference numeral 3 denotes a container for accommodating the rotors 1 and 2, and reference numeral 4 denotes a sealing member provided on the inner wall surface of the container 3, and an annular surface of the rotor 1 (and 2) (an annular surface formed between the rotor body and both end shafts). ) Includes a seal plate (5 in FIG. 5).
See).

Reference numeral 3 'denotes a plurality of protrusions provided on the inner wall surface of the container 3, and each of the protrusions 3' is provided in a tangential direction at intervals around an axis, which faces the annular surface of the rotor 1. doing. In the dust stop of the pressure kneader shown in FIG. 1, when the rotor 1 (and 2) rotates, the annular surface of the rotor 1 (the annular surface formed between the rotor body and both end shafts) and the inner wall surface of the container 3 The paste-like raw material (kneaded rubber) that has entered between them hits each projection 3 ′ and is pushed outward in the radial direction. For this reason, the paste-like raw material enters between the seal member 4 and the seal plate (5 in FIG. 5) embedded in the annular surface of the rotor 1, and wear of the seal member 4 is suppressed.

The paste-like raw material (kneaded rubber) fills the space between the annular surface of the rotor 1 (and 2) and the inner wall surface of the container 3, and this part becomes high pressure, and the seal member 4 and the seal plate 5 are filled. Are not separated from each other, so that the material to be kneaded (paste-like raw material (kneaded rubber)) is prevented from leaking. (Second Embodiment) Next, the dust stop of the pressure kneader of the present invention will be described with reference to a second embodiment shown in FIG.
Are a plurality of protrusions provided on the seal plate 5 and 5 'are seal plates embedded in an annular surface of the rotor 1 (and 2) (an annular surface formed between the rotor body and the shafts at both ends). Are provided tangentially at intervals around the axis, which oppose the inner wall surface of the container 3.

4 is a seal member, 6 is a sleeve supporting the seal member 4, 8 is a spring support member fixed to the outer wall surface of the container 3, and 7 is a spring interposed between the spring support member 8 and the sleeve 6. is there. The operation of the dust stop of the pressure kneader shown in FIG. 2 is the same as the operation of the dust stop of FIG.

Since each projection 5 ′ is formed on the seal plate 5, the processing becomes easier as compared with a case where each projection 5 ′ is formed directly on the annular surface of the rotor 1 or the inner wall surface of the container 3. Since the projections 5 'are formed on the seal plate 5 made of a hard material, the cost increases. Therefore, they may be manufactured separately. (Third Embodiment) Next, the dust stop of the pressure kneader of the present invention will be described with reference to a third embodiment shown in FIG.
Is a seal plate embedded in an annular surface of the rotor 1 (and 2) (an annular surface formed between the rotor main body and both end shafts), 9 is a ring-shaped member movable in the axial direction, and 9 'is a ring-shaped member. 9, a plurality of protrusions 9 'are provided in a tangential direction at intervals around an axis, which face the annular surface of the rotor 1.

4 is a seal member, 6 is a sleeve supporting the seal member 4, 8 is a spring support member fixed to the outer wall surface of the container 3, 7 is a spring interposed between the spring support member 8 and the sleeve 6, Reference numeral 10 denotes a spring for urging the ring-shaped member 9 movable in the axial direction in the direction of the rotor 1 in the annular groove provided in the wall of the container 3. Thus, the ring-shaped member 9 and each projection 9 ′
The rotor 1 can be moved in the axial direction,
When an excessive pressure acts on the paste-like raw material (kneaded rubber) that has entered between the above-mentioned annular surface and the inner wall surface of the container 3,
The ring-shaped member 9 and each of the protrusions 9 'escape to relieve excessive pressure.

The other operations are the same as those of the dust stop shown in FIG.

[0017]

As described above, when the pair of rotors are rotated as described above, the dust stop of the press kneader according to the present invention has the annular surface of the rotor (the annular surface formed between the rotor body and the shafts at both ends) and the container. The material to be kneaded (paste-like raw material (kneaded rubber)) that has entered between the inner wall surface of the first member and the second member is brought into contact with the respective projections and is pushed outward in the radial direction, so that abrasion of the seal member can be suppressed.

Further, the paste-like raw material (kneaded rubber) fills the space between the annular surface of the rotor and the inner wall surface of the container, and this portion becomes high in pressure and does not separate the seal member from the seal plate. In addition, leakage of the material to be kneaded (paste-like raw material (kneaded rubber)) can be prevented.

[Brief description of the drawings]

FIG. 1 is a first diagram illustrating a dust stop of a press kneader according to the present invention.
It is a perspective view showing an embodiment.

FIG. 2 shows a second example of the dust stop of the pressure kneader of the present invention.
It is a longitudinal side view which shows embodiment.

FIG. 3 shows a third dust stop of the press kneader of the present invention.
It is a longitudinal side view which shows embodiment.

FIG. 4 is a perspective view showing a conventional pressure kneader.

FIG. 5 is a vertical side view showing a dust stop of a conventional pressure kneader.

[Explanation of symbols]

 1, 2 Rotor 1 ', 2' Protrusion provided on rotor 1, 2 outer peripheral surface 3 Container 3 'Tangential projection provided on inner wall surface of container 3 4 Seal member 5 Seal plate 5' Tangential direction provided on seal plate 5 6 sleeve 7 spring 8 spring support member 9 ring-shaped member 9 ′ tangential projection provided on ring-shaped member 9 10 spring

Claims (3)

[Claims] A pair of rotors each having a projection formed on the outer peripheral surface of the rotor body and an annular surface orthogonal to the axis between the rotor body and both end shafts; The container inner wall surface is rotatably supported by the container, and the inner wall surface of the container is opposed to the annular surface, and the rotors are rotated in opposite directions, and the material to be kneaded is moved to the space between the rotors and the container. In a pressure kneader to be charged and kneaded, a plurality of protrusions are provided on one of an annular surface of each rotor and an inner wall surface of the container in a tangential direction at intervals around an axis. Dust stop for pressure kneader. 2. The dust stop of a pressure kneader according to claim 1, wherein a ring-shaped member having the protrusion is provided concentrically with respect to an axis on one of an annular surface of each of the rotors and an inner wall surface of the container. . 3. A ring-shaped member having the protrusion on one of an annular surface of each of the rotors and an inner wall surface of the container so as to be concentric with an axis and capable of moving in the axial direction. 3. The dust stop of the pressure kneader according to claim 1, wherein the spring is urged toward the facing surface by a spring.