JPH0679521U - Feed rubber forced biting device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the quality of extruded products by improving the biting of the feed roller rubber and reducing the variation in the weight of extruded products. [Structure] The rubber supply port 10A of the rubber extruder 10 is
A feed rubber forcing device 12 is provided. A fixed guide roller 2 is provided in the feed rubber forcing device 12.
6 is arranged with its axis oriented in the same direction as the feed roller 22. The moving guide roller 38 is rotatably supported by a bracket 42, and the tip of a rod 52 of an air cylinder 50 serving as a moving mechanism is fixed to the bracket 42. Therefore, when the air cylinder 50 is pressurized, the moving guide roller 38 moves from the standby position to the feed rubber sandwiching / conveying position, and the feed rubber 64 is sandwiched and conveyed almost directly above the feed roller 22 with the fixed guide roller 26. It has become.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed rubber forcing device, and more particularly to a feed rubber forcing device provided at a rubber supply port of a rubber extruder.

[0002]

[Prior art]

 Conventionally, a hopper 70 is provided at the feed rubber supply port of a rubber extruder as shown in FIG. The end 72A of the feed conveyor 72 is located at the upper center of the hopper 70, and the feed rubber 74 on the feed conveyor 72 is supplied to the substantially central portion of the rubber supply port 76A of the rubber extruder 76. ing . A feed roller 78 and a screw 80 are arranged in parallel below the rubber supply port 76A, and the feed rubber 74 is supplied between the feed roller 78 and the screw 80. There is.

The width of the feed rubber 74 or the conveying speed of the feed conveyor 72 is set so that the feed rubber 74 can be supplied in an amount corresponding to the extrusion amount of the rubber extruder 76, that is, the rotation speed of the screw 80. There is.

However, in the rubber supply section of this rubber extruder, the supply position of the feed rubber 74 may shift to the screw 80 side as shown by the phantom line in FIG. 4, and in this case, The biting of the feed rubber 74 into the feed roller 78 becomes poor and the feed rubber 74 becomes loose. In particular, the slack of the feed rubber 74 easily occurs when the rotation speed of the screw 80 is low. Thus, once the feed rubber 74 is loosened, the feed rubber 74 is more difficult to be caught in the feed roller 78, and the feed rubber 74 is clogged in the rubber supply port 76A. As a result, the weight variation of the extrudate becomes large and the quality deteriorates.

As a related technique, there is JP-B-51-32857, but in this case as well, the feed rubber is likely to be clogged with the rubber supply port, resulting in a large variation in the weight of the extruded product and deterioration in quality.

[0006]

[Problems to be solved by the device]

 In consideration of the above facts, the present invention aims at obtaining a feed rubber forced-engagement device capable of improving rubber entrapment of a feed roller, reducing variation in weight of extrudate, and improving quality of extrudate. is there.

[0007]

[Means for Solving the Problems]

 According to another aspect of the present invention, there is provided a feed rubber forcing device which is parallel to the feed roller near the feed port of the extruder and at a position where the feed rubber holding surface is substantially directly above the feed roller of the extruder. A fixed guide roller attached to the fixed guide roller, a movable guide roller which is arranged in parallel with the fixed guide roller and is movable in a direction of moving toward and away from the fixed guide roller, and the movable guide roller is separated from the fixed guide roller. And a moving mechanism for moving to a feed rubber holding position where the feed rubber is held and conveyed between the standby position and the fixed guide roller.

[0008]

[Action]

 In the feed rubber forcing device of the present invention as set forth in claim 1, when the feed rubber is supplied to the supply port of the extruder, the moving mechanism moves the moving guide roller from a standby position separated from the fixed guide roller. It moves to the feed rubber holding position where it holds and feeds the feed rubber with the fixed guide roller. As a result, the feed rubber is nipped and conveyed by the fixed guide roller and the moving guide roller, and is fed from the vicinity of the feed port of the extruder to a position almost directly above the feed roller.

Therefore, the feed rubber is always stably fed onto the feed roller, so that the rubber is well caught in the feed roller, the variation in the weight of the extruded product can be reduced, and the quality of the extruded product can be improved.

[0010]

【Example】

 An embodiment of the feed rubber forcing device of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a rubber feed port 10 A of the rubber extruder 10 is provided with a feed gum forcing device 12. Further, in the rubber extruder 10, a feed roller 22 and a screw 24 are arranged parallel to each other with their respective axes centered vertically rearward of the paper surface of FIG. 1, and an intermediate portion between the feed roller 22 and the screw 24. The portion faces the substantially central portion of the rubber supply port 10A. The rotation direction of the feed roller 22 is the counterclockwise rotation direction (arrow A direction in FIG. 1) of FIG. 1, and the rotation direction of the screen 24 is the clockwise rotation direction (arrow B in FIG. 1). Direction).

As shown in FIG. 2, the feed rubber forcing device 12 has a base 14 having a substantially rectangular shape, and the base 14 is an edge portion 10 B of the rubber supply port 10 A of the rubber extruder 10. It is fixed to. In addition, a rectangular through hole 16 is formed in the central portion of the base 14 at a portion facing the rubber supply port 10A of the rubber extruder 10.

As shown in FIG. 1, a rectangular upper plate 18 is arranged in parallel with the base 14 on the upper part of the base 14, and the upper plate 18 is composed of four pillars 20 provided at its corners. It is supported by the base 14. In addition, a rectangular through hole 25 is formed in the upper plate 18 at a position facing the through hole 16.

As shown in FIG. 2, a fixed guide roller 26 is arranged above the edge portion 16 A of the through hole 16 of the base plate 14 on the feed roller 22 side with the axis lined in the same direction as the feed roller 22. Thus, the feed rubber holding surface position 26 A of the fixed guide roller 26 is almost directly above the feed roller 22. Both ends of the shaft 27 of the fixed guide roller 26 are rotatably supported by bearings 28 fixed to the base 14, and a pulley 30 is fixed to one end 27A of the shaft 27. The pulley 30 is connected by a timing belt 32 to a pulley 36 fixed to the output shaft of a motor 34. Therefore, when the output shaft of the motor 34 rotates, the fixed guide roller 26 rotates.

On the other hand, a moving guide roller 38 is arranged above the edge portion 16 B of the through hole 16 of the base plate 14 on the screw 24 side with the axis lined in the same direction as the screw 24. Both ends of a shaft 40 of the moving guide roller 38 are rotatably supported by both ends 42A and 42B of a bracket 42 having a U-shaped cross section. Further, the tip portion of the rod 52 of the air cylinder 50 as a moving mechanism is fixed to the central portion of the base portion 42C of the bracket 42, and when the air cylinder 50 is pressurized, the rod 52 extends and the moving guide roller. 1 is moved from the standby position (the position indicated by the solid line in FIG. 1) to the right in FIG. 1 (the direction indicated by the arrow C in FIG. 1), and the feed rubber holding and conveying position is approached to the fixed guide roller 26 (the position indicated by the imaginary line in FIG. 1). ) It is supposed to stop at. The distance between the fixed guide roller 26 and the moving guide roller 38 at the feed rubber sandwiching / conveying position is set to be at least 10 mm, and the feed rubber 64 having a thickness of 11 to 12 mm is stronger than necessary. It is designed not to be pinched.

Further, the air cylinder 50 is fixed to the base 14 via a block-shaped bracket 54, and two guide rods 56 are movably penetrated through the bracket 54 with the air cylinder 50 interposed therebetween. is doing. A plate 58 is installed on one end of one of these two guide rods 56, and the other end is fixed to the base 42C of the bracket 42. Therefore, the two guide rods 56 keep the moving guide roller 38 parallel to the fixed guide roller 26.

As shown in FIG. 1, a hopper 60 is provided coaxially with the through hole 25 on the upper surface of the upper plate 18 of the feed rubber forcing device 12. The end 62A of the feed conveyor 62 is located in the upper center of the hopper 60, and the feed rubber 64 on the feed conveyor 62 is fed to the rubber feeding port 10A of the rubber extruder 10 at a substantially central portion. It has become. The ratio of the transport speed V1 of the feed conveyor 62 to the transport speed V2 of the fixed guide roller 26 is V1: V2≈1: 1.15, and the ratio between the feed conveyor 62 and the fixed guide roller 26 is The feed rubber 64 is designed not to slacken. Further, in order to supply the feed rubber 64 in an amount commensurate with the extrusion amount of the rubber extruder 10, that is, the rotation speed of the screw 24, the feed speed of the feed conveyor 62 is changed in accordance with the change in the rotation speed of the screw 24. V1 or the width W of the feed rubber 64 (see FIG. 3) is changed.

Next, the operation of this embodiment will be described. In the feed rubber forcing device 12 of this embodiment, when the feed rubber 64 is supplied to the supply port 10A of the extruder 10, the air cylinder 50 is depressurized, that is, the moving guide roller 38 is at the standby position ( At the position (solid line position in FIG. 1), the leading end of the feed rubber 64 is passed between the fixed guide roller 26 and the moving guide roller 38. After that, the air cylinder 50 is pressurized to move the moving guide roller 38 from the standby position to the feed rubber sandwiching and conveying position (the position indicated by the imaginary line in FIG. 1). As a result, the feed rubber 64 moves integrally with the moving guide roller 38 toward the fixed guide roller 26, and the trajectory of the feed rubber 64 becomes as shown in FIG. Therefore, when the fixed guide roller 26 is rotated by the motor 34 in the feed rubber supply direction (arrow D direction in FIG. 1), the feed rubber 64 is nipped and conveyed between the fixed guide roller 26 and the moving guide roller 38, It is supplied from the vicinity of the supply port 10A of the extruder 10 to a position substantially directly above the feed roller 22.

Therefore, even if the feed rubber 64 swings to some extent during the feeding, the feed rubber 64 is always stably fed onto the feed roller 22, so that the rubber of the feed roller 22 is well caught and the weight of the extrudate is large. Variations can be reduced and extrudate quality can be improved.

[0020]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has an excellent effect that the rubber of the feed roller can be better caught and the weight variation of the extrudate can be reduced to improve the quality of the extrudate. . In addition, by using the feed rubber forcing device of the present invention, the weight variation of the extrudate can be reduced by about 38% as compared with the case where the feed rubber forcing device of the present invention is not used.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a feed rubber forcing device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a side sectional view showing a feed rubber forcing device according to a conventional example.

[Explanation of symbols]

 10 Rubber Extruder 10A Rubber Supply Port 12 Feed Rubber Forced Engaging Device 22 Feed Roller 24 Screw 26 Fixed Guide Roller 38 Moving Guide Roller 50 Air Cylinder (Movement Mechanism) 52 Rod

Claims (1)

[Scope of utility model registration request] 1. A fixed guide roller mounted in parallel to the feed roller of the extruder at a position near the feed port of the extruder and at a position where the feed rubber holding surface is substantially directly above the feed roller of the extruder, and the fixed guide roller. A feed guide roller that is arranged in parallel with the fixed guide roller and is movable in a direction to move toward and away from the fixed guide roller, and a feed position between the fixed guide roller and a standby position where the movable guide roller is separated from the fixed guide roller. And a moving mechanism for moving to a feed rubber holding position.