SU1416103A1 - Apparatus for manufacturing brush briquettes from thermoplastic monofibre - Google Patents

Abstract

The invention relates to the production of brushes, namely, devices for making brush briquettes from thermoplastic monofilament, used, for example, in cotton pickers and cotton ginning machines. The purpose of the invention is to improve the quality of briquettes. The device contains a mechanism for feeding the tape monofilaments in the treatment area, the mechanism of connection

Description

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The monofilaments, containing an element 11 for their melting, mounted on the cross bar 12, installed with the possibility of reciprocating movement in the direction perpendicular to the direction of supply of the monofilament tape, means for clamping the tape, having spring-loaded clamping jaws 16, 17 and drive. The coupling mechanism of the monofilaments is provided with straps 14, 15, spring-loaded respectively to the clamping jaws 16, 17 in the direction of supply of the tape, and a two-arm rotary lever 29, one shoulder of which carries the cradle 30. The cradle 30 is placed under the element 11 for melting coaxially with it and has a shaping groove 33. The other lever arm 29 is kinematically associated with the drive. 1 il.

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The invention relates to brush production, namely, devices for making brush briquettes from thermoplastic monofilament used, for example, in cotton harvesting and cotton cleaning machines.

The purpose of the invention is to improve the quality of briquettes.

The drawing shows a kinematic diagram of the device.

The device contains a feeder of a monofilament ribbon to the treatment area consisting of jaws 1 and 2, between which the tape is clamped by means of a spring 3. The jaws 1 and 2 are mounted for movement along guide 4 under the lift of a cam 6 The jaws 1 and 2 are released from the cam 7 via a spring-loaded pusher 8, pull 9 and roller 10 connected to the sponge 1..

The mechanism for connecting the monofilaments of a tape contains a melting element 11, for example, a source of ultrasonic vibrations mounted on a drive cross bar 12, which is rigidly connected to the stem of the power cylinder 13. The means for clamping the tape include strips 14 and 15 movably mounted in the jaws 16 and 17 and spring-loaded in the feed direction of the monofilament by the springs 18 and 19. The jaws 16 and 17 are rigidly fixed to the pushers 20 and 21, which are kinematically interconnected by a rack and pinion gear 22. The pusher 20 interacts em with cams 23. But

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24 and 25, designed to cut the monofilament into individual briquettes, kinematically connected to each other by a rack-and-pinion mechanism 26, which is connected to a cam via a spring-loaded pusher 27

28. The bonding mechanism of the monofilaments has a double shoulder. swiveling pinch

29, one shoulder of which carries a cradle 30, placed under the element 11 for melting coaxially with it, and is pivotally connected to a pusher 31 springed to the cam 32. The cradle has a shaping groove 33.

The device works as follows.

After switching on the drive (not shown), the monofilament is closed with the jaws 1 and 2 under the influence of the spring 3. The slats 14 and 15 are open, the knives 24 and 25 are divorced, the melting element 11 is in the extreme upper position.

Under the influence of the cam 6, through the lever 5, the jaws 1 and 2 move along the guide 4 and move the monofilament into the treatment zone. The edge of the monofilament extending beyond the sponges 1 and 2 appears between the slats 14 and 15, the ends of the sponges 1 and 2 abut against the ends of the slats 14 and 15 and move them in the feed direction of the monofilament, compressing the springs 18 and 19. This design is due to the fact that the edge of the monofilament protruding beyond the sponges 1 and 2 does not have a common melted edge and the ends of the filaments forming the monofilament protrude beyond the limits of the sponges 1 and 2 fanlike. therefore

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 To ensure guaranteed clamping of all threads, gaps are necessary between the sponge 1 and the strap 14, as well as the sponge 2 and the strap 15, which could be caught. At the same time, the size of the monofilament protruding beyond the edges of the sponges 1 and 2 is less than half the distance nor, between the strips 14 and 15. This avoids strands falling into the gaps between the sponge

I strap 14, sponge 2 and strap

15 at their rapprochement. Then, under the action of the cam 23 and the pusher 20, the rack and pinion mechanism ensures that the bars 14 and 15 come together, and the monofilament is clamped between them. At this point, the jaws 1 and 2 unclench under the action of the cam 7 and the pusher 8 and move to their original position under the influence of the cam 6 and the lever 5.

Under the action of the cam 28, the pusher 27, moving upwards, drives the rack-and-pinion mechanism 26, which causes the skin 24 and 25 to converge, which cut the monofilament.

Under the influence of the piston of the power cylinder 13-traverse 12 and the element 11 for melting move downwards. Moreover, in view of the fact that one edge of the monofilament is clamped by the strips 14 and 15, and the other edge formed after cutting with knives 24 and 25 is free, the element 11 for melting as it moves downward entails the monofilament in the shaping groove of the lodgement 30. the melting element 11 contacts with the monofilament in the middle of the cut-off area and produces the fusion of the filaments and the formation of a single seam as a result of diffusion of the molten material, which prevents the scattering of the filaments. Then element

M1 under the action of the piston of the power cylinder 13 is retracted upwards. Slats 14 and 15 are released.

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and retracted under the action of the cam 23 and the gear train 22. Under the action of the cam 32 and the pusher 31, the lever 29 rotates around its own axis, and the finished briquette is ejected into the container by the action of its own weight. After that, the lever 29 returns to its original position. The cycle is repeated.

The resulting preform is a set of yarns bonded by melting in the middle of the set length. In this case, the width of the melted area is determined by the load on the briquette during operation. As a result, the need for an additional suture reinforcement operation is eliminated.

Claims (1)

Invention Formula A device for making brush briquettes from thermoplastic monofilament, comprising a feeding mechanism chucks of monofilaments into the treatment area, a mechanism for joining monofilaments containing an element for their melting, mounted on a traverse mounted for reciprocating movement in the direction perpendicular to the direction of supply of the monofilament tape, means for clamping the tape having spring-loaded clamping jaws , and an actuator, characterized in that, in order to improve the quality, the monofilament connecting mechanism is provided with planks, spring-loaded respectively to the clamping jaws in the feed direction of the tape, and two shoulders a rotary lever, one shoulder of which is carried by a cradle, placed under the element for melting the monofilament 6n coaxially with it and having a shaping groove, and the other is kinematically connected with the drive.