| 摘要 |
918,112. Moulding reinforced articles, UNITED STATES RUBBER CO. Jan. 27, 1961 [March 2, 1960], No. 3201/61. Class 87(2). In a method of making a fabric reinforced elastomeric article e.g. a toothed belt, a substantially cylindrical fabric reinforcement 16 is disposed about a core 20 in a mould cavity so that one end of the reinforcement rests on the base of the mould and the other end extends to the top of the mould, the fabric being otherwise unsupported, a liquid elastomer is injected into the cavity through a bore 12 at such a rate and in such a location as to force the fabric into a desired position and shaped by pressure of the liquid elastomer on the reinforcement 16, and the elastomer is cured in the mould. The reinforcement 16 may be of card or woven fabric, of nylon, rayon or cotton, or metal wire, and the elastomer may be a liquid polyurethane, a vinyl plastisol, depolymerised rubber, latex, a liquid phenolic or an epoxy. The belt teeth are formed by passage of the elastomer through the reinforcement 16 to fill indentations (not shown) on the core 20. By placing the bore 12 between the reinforcement 16 and the core 20 the reinforcement is forced to the outside of the mould cavity, Figs. 5 and 6 (not shown), and by use of two bores 12, one on each side of the reinforcement 16, it is held in the middle of the elastomer contained in the filled mould, Fig. 7 (not shown). The reinforcement 16 may be made to take up more complicated positions e.g. S or coneshaped sections. Specification 744,909 is referred to.
|
