SU1481076A1 - Arrangement for manufacturing rubber tooth belts - Google Patents

Abstract

The invention relates to manufacturing equipment for the manufacture of rubber products and can be used to make endless timing belts. The goal is to make it possible to manufacture a toothed belt with a fabric lining of the teeth and to provide a concentric arrangement of sectors. SUBSTANCE: both covers are made with stepped inner conical surfaces, with the pressing outer elements made from their ends with outer conical surfaces for contacting with conical surfaces with a large angle of taper of the covers. The caps have holes for fitting the end portions of the central rod therein. 1 hp f-ly, 2 ill.

Description

The invention relates to manufacturing equipment for the manufacture of rubber products and can be used to make endless timing belts.

The aim of the invention is to make it possible to manufacture a toothed belt with a fabric facing of teeth and to develop a concentric arrangement of sectors.

FIG. 1 shows the proposed device, a general view, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The device contains a molding mandrel 1, having a central core 2, forming a working surface of mandrel 1 sectors 3, a lock 4 in contact with one ends of sectors 3, mounted

concentric with the central rod 2 and interacting with the other ends of the sectors 3, the liner 5, the lid 6 and the lid 7. The lids 6 and 7 are made with stepped inner conical surfaces, each of the lids 6 and 7 being made with conical surfaces 8 and 9 large and small head cone. Restrictive flanges 10 and 11 are attached to the ends of the mandrel 1, between which pressing external elements are placed in the form of ring sectors 12, the latter from the side of their ends are made with external conical surfaces for contact with the conical surfaces 8 of covers 6 and 7. Holes are made in the covers 13 for mounting the end portions of the central rod therein.

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Dorn 1 with sectors 3, lock 4, liner 5 and central rod 2 form a drum for assembling a toothed belt 14. The surface of the sectors 3 is made toothed. After the drum has been assembled onto the rod 2, the nut 15 is screwed on and tightened. The diameter of the circle corresponding to the inner pressing surface of the sectors in their closed state is equal to the diameter of the outer surface of the wickel belt 14. The sectors 12 have outer cones on their ends, mating with internal cones of covers 6 and 7 with their axial movement allows to obtain a radial movement of the annular sectors 12 relative to the drum, i.e., to press the workpiece assembled on the drum. Sectors 12, at their junction points, are provided with edges for trimming blues, formed by beveling the interfaces. The conical surface 9 with a small angle of taper is designed to mate with the conical surface of the lock 4 and liner 5.

The device works as follows.

Between the flanges 10 of the drum, on top of the future Vikel billet, consisting of fabric, cord and raw rubber, are placed the sectors 12 encompassing the billet. Then the mandrel 1 assembled with sectors 12 is installed in the cover 7 so that the end portion of the rod 2 enters the opening 13 of the cover 7. The lower outer cone of the sectors 12 is centered along the large internal cone of the cover 7. The cover 6 is put on the drum so that

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the ends - a part of the rod 2 enters the opening 13 of the cover 6, and the inner large cone of the cover 6 is centered on the outer upper cone of the sectors 12 assembled on the drum. The preassembled device thus assembled is placed in the chamber of a vulcanization press. When the lower press plate is lifted, the axial force transmitted to the covers 6 and 7 of the device is converted into radial movement of sectors 12 due to the interaction of the conical surfaces of covers 6 and 7 and sectors 12. The workpiece is pressed by radially converging sectors 12. The final position of the sectors is reached at mating the end parts of the rod 2 with the small inner cones of the lids 6 and 7. At this moment the sectors close together, and their inner pressing surface forms a regular circle concentrating ny toothed drum. Excess raw rubber is removed at the initial stage of pressing, into the space formed by the bevel of the edges of sectors 12 at the places of their joint, and later through the holes made in the flanges of the toothed drum. Removing the oblo from the outer surface of the vickel of the toothed belt 14 is performed by cutting edges when sectors 2 are closed. After vulcanization, the device is removed from the chamber of the vulcanization press and disassembled. Sectors 12 are first removed, then the toothed drum is disassembled and a cured wickel is obtained. Then the cycle repeats.

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Claims (1)

1. DEVICE FOR MANUFACTURING RUBBER GEAR BELTS, comprising a forming mandrel, having a central shaft, sectors forming a working surface of the mandrel, a lock with an external shaping