| 摘要 |
The present invention provides a process for producing an endless toothed belt from an extrudable material having a wire-like or filamentary reinforcing layer extending in the peripheral direction of the belt and a fabric coating covering a toothed side of the belt, in which a finite length strand in initially formed in a closed mould cavity from an injected liquid plastics material and an inserted fabric strip, which is passed along a shaping surface of the mould cavity, said shaping surface forming the toothed side of the belt, while said toothed belt side is coated with the fabric strip, the rear, which faces away from the toothed belt side, 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, with the rear turned outwards, to form a ring and with the two ends laterally staggered with respect to each other by at least one groove interval so that the grooves on the ring extend helically on the ring in its peripheral direction, thereafter a reinforcing layer fitting into the grooves is enclosed in said grooves starting at one edge of the ring and the rear of the ring is then heated so that the reinforcing layers are sealed in the grooves by fusing the extruded material, whereupon the grooves are closed while a smooth rear surface is formed. |
