JP2521794Y2 - Automatic kneading machine in rubber kneading machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic kneading device in a rubber kneading machine.

[0002]

2. Description of the Related Art In general, a rubber kneading machine is provided with a kneading device consisting of two rollers above a rolling roller, and the rubber rolled by the rolling roller is kneaded again by passing the kneading device. ing.

One of the two rollers in the kneading apparatus is a driving roller rotatably supported at a fixed position on the machine body, and is driven and rotated at a required speed by a motor. The other roller is a pressing roller that is disposed above the driving roller while maintaining a constant gap for re-mixing with the driving roller, and rotates following the driving roller. .

[0004] In order to rotate the pressing roller following the driving roller, various driven rotation mechanisms have been used. For example, in the initial kneading machine, the rubber itself to be kneaded is used as a medium for driven rotation, and when the rubber is inserted between the rollers, the pressing roller that has been stopped until then is driven with the rubber as a friction medium. Had to rotate.

[0005] However, in general, this kind of milling device is provided above a rolling roller and its height is more than 2 m above the floor. Therefore, rubber must be supplied by throwing up rubber from the lower portion of the rolling roller. In this case, if the press roller is stopped, it is very difficult to correctly insert the rubber between the press roller and the drive roller, and even a skilled person has repeatedly failed. .

Therefore, the necessity of constantly rotating the press roller following the drive roller has been recognized. As a result, a friction ring of various materials is fitted and fixed to the outer periphery of the press roller as a driven rotation mechanism. A method has been devised in which the friction ring is pressed against the drive roller by the weight of the pressure roller, whereby the pressure roller is driven to rotate by frictional force.

However, the force with which the friction ring is pressed against the driving roller is extremely large. Therefore, when the friction ring is formed of a material such as rubber or plastic, the friction ring is formed as a ring fitted on the outer periphery of the pressing roller. Due to its nature, its thickness must be reduced, so that it must have sufficient strength to withstand the compressive load that repeatedly acts on its entire circumference due to rotation and the frictional heat generated by the compressive load. As a result, the friction ring is cut or chipped in a short time due to brittle fatigue or thermal deterioration, and the friction ring is disadvantageously mixed as a foreign substance. Also known is one in which the friction ring is formed of iron of the same material as the roller, but is severely damaged by abrasion, and a large amount of iron powder is generated and mixed into the rubber or penetrates into the movable parts of the kneading machine. That situation was inevitable.

[0008]

The problem to be solved by the present invention is to provide a rubber having a durable driven rotation mechanism which is superior in absorbability of a compressive load by a simple structure and which is not easily broken by brittle fatigue or thermal deterioration. An object of the present invention is to provide an automatic kneading machine.

[0009]

In order to solve the above-mentioned problems, the present invention is provided so as to be rotatable at a fixed position on an airframe,
A drive roller driven and rotated by a motor at a required speed, and a pressing roller disposed above the drive roller with a gap for rubber kneading maintained and rotated by the driven roller by a driven rotation mechanism. The driven rotation mechanism has a friction disk formed of a wear-resistant elastic material with a diameter larger than that of the pressing roller, and the friction disk is coaxial with both ends of the pressing roller. It is fixed, and the outer peripheral surface of each friction disk is in contact with the drive roller.

[0010]

When the rubber is kneaded, the pressing roller is constantly rotated following the driving roller by the frictional force of the friction disk of the driven rotating mechanism pressed against the driving roller. At this time, since the radial thickness of the friction disk is large, the compression load acting on the friction disk by the rotation of the pressing roller is:
It is efficiently absorbed and attenuated by the wall thickness near the axis, and hardly generates brittle fatigue and heat generated by compression.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, one embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 schematically show the structure of a rubber kneader, where 1 is an airframe, and 2 and 2 are A pair of rolling rollers 3 supported so as to be rotatable on the machine body 1, a kneading device 3 disposed above the rolling rollers, and 4 a rubber being kneaded.

The kneading device 3 is provided with a driving roller 6 rotatably supported at a fixed position on the machine body 1 and a gap for rubber kneading maintained above the driving roller 6. And a pressing roller 7. The driving roller 6 is connected to a motor 8, and is driven and rotated at a required speed by a suitable transmission mechanism 8a by the motor 8. On the other hand, the pressing roller 7 has two ends of a rotating shaft 7a. The portion is rotatably supported by bearing arms 9, 9, and can be moved toward and away from the drive roller 6 by turning the bearing arms 9, 9 around a support shaft 9 a. At both ends, a driven rotation mechanism 10 is provided, and is configured to rotate following the drive roller 6 by the operation of the driven rotation mechanism 10. The driven rotation mechanism 10 also serves as a means for maintaining the above-mentioned rubber kneading gap between the driven rotation mechanism 10 and the driving roller 6, and the specific configuration thereof is as follows.

That is, as shown in detail in FIGS. 3 and 4,
The driven rotation mechanism 10 includes friction disks 11 fixed to both ends of the pressing roller 7. The friction disk 11
The pressing roller 7 is formed of a material such as rubber or plastic having a required abrasion resistance, elasticity and frictional force, to have a diameter larger than the diameter of the pressing roller 7 by an amount necessary to form the gap. 11a, the rotary shaft 7a of the press roller 7 is inserted through the coaxially contacting end surfaces of the press roller 7 and a plurality of bolts 13 through a small-diameter fixing plate 12 abutting the outer surface. The friction disk 11 is fastened and fixed to the pressing roller 7, and the outer peripheral surface of the friction disk 11 is in contact with the driving roller 6. The fixing plate 12 can be formed of any material having a strength necessary for fixing, such as metal or plastic.

In the kneading machine having the above structure, the rubber 4 rolled by the rolling rollers 2 and 2 is supplied to the kneading device 3 and inserted between the driving roller 6 and the pressing roller 7 to re-knead. Is done. At this time, the pressing roller 7
Friction disks 11 of driven rotation mechanism 10 formed at both ends thereof
Is pressed against the drive roller 6 so that the friction disk 11
The rubber roller 4 is always rotated following the drive roller 6 with the frictional force of the above, so that the operation of inserting the rubber 4 between the rollers 6 and 7 is easy.

Further, the friction disk 11 in the driven rotation mechanism 10 is formed not as a conventional annular one having a small radial thickness but a disk-shaped one having a large radial thickness. The compression load acting on the friction disk 11 due to the rotation of the pressing roller 7 is efficiently absorbed and attenuated by the wall thickness close to the axis, and not only does not cause brittle fatigue but also generates heat due to compression. Almost no occurrence.

[0016]

As described above, according to the present invention, the driven rotation mechanism for rotating the press roller in accordance with the drive roller is formed by a friction disk having a large thickness in the radial direction. The compressive load acting on the friction disk can be efficiently absorbed and attenuated by the wall thickness close to the axis, thereby preventing brittle fatigue and heat generation due to compression of the friction disk and improving durability. Can be enhanced.

[Brief description of the drawings]

FIG. 1 is a front view of a kneader provided with the automatic kneading device of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of a main part of a pressing roller in the automatic kneading device.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 body 3 kneading device 4 rubber 6 drive roller 7 holding roller 8 motor 10 driven rotation mechanism 11 friction disk

Claims (1)

(57) [Scope of request for utility model registration] 1. An air conditioner, which is rotatably disposed at a fixed position on an airframe,
A drive roller driven and rotated by a motor at a required speed, and a pressing roller disposed above the drive roller with a gap for rubber kneading maintained and rotated by the driven roller by a driven rotation mechanism. Wherein the driven rotation mechanism has a friction disk formed of a wear-resistant elastic material with a diameter larger than that of the pressing roller,
The friction disks are coaxially fixed to both ends of the pressing roller,
An automatic kneading device in a rubber kneader, wherein an outer peripheral surface of each friction disk is in contact with a driving roller.