| 摘要 |
A process for manufacturing a sole for shoes composed of a tread sole made of vulcanised rubber provides, for the vulcanizable rubber, a mixture composed of a vulcanizable nitrile rubber (NBR), at least one hydroxyl acrylic resin, at least one hydrocarbon resin, at least one reinforcing filler, and at least one vulcanization accelerator. A dosed amount of the mixture is introduced in a first mold cavity (2), in which the bottom is constituted by a piston (12), which is kept at a temperature of 100-200 DEG C, while in an upper region there is a dummy last (8), which is also kept at a temperature of 100-200 DEG C, the two temperatures being adjustable independently of each other. After preparing the tread sole in this manner, the sole bottom, supported by the piston, descends and forms an additional cavity into which the two-component polyurethane is injected. The vulcanizable rubber with the mixture adopted has many free bonds, which combine with the polyurethane, giving rise to a very strong coupling.
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