| 摘要 |
A method of producing an endless toothed belt of synthetic or plastics material, or similar extrudable material, having a wire- or thread-like reinforcing insert which extends in the circumferential direction of the belt and having a fabric cover covering the toothed side of the belt. A finite belt strand is formed in a closed mold cavity from introduced liquid plastics material and from a fabric strip which is introduced along that shaping surface of the mold cavity which forms the toothed side of the belt strand, thus coating the toothed side of the belt strand with the fabric strip. That side of the belt strand which is remote from the toothed side of the belt is provided with a plurality of grooves extending in the longitudinal direction of the belt strand. The belt strand is then joined at its ends to form an endless ring having its grooved side turned outwardly and having its ends offset laterally relative to one another by the spacing of at least one groove, so that the grooves extend helically on the ring in the circumferential direction thereof. Beginning at one edge of the ring, a reinforcing insert which fits into the grooves is wound into the grooves. The grooved outer side of the ring is then heated in such a manner that, as a result of melting of the plastics material, the reinforcing inserts are fused into the grooves and the grooves are closed to form a smooth outer surface. |
