| 摘要 |
Process for injection moulding rubber or rubber-mixture soles having at least two layers and connecting them to one another and if required to a shoe upper. First the rubber mixture for the bottom sole layer is injected into an enlarged mould cavity and the latter is made smaller to match the volume of the bottom sole layer; once the rubber mixture has partially solidified the upper delimitation means for the bottom sole layer is removed and is replaced by a last. The rubber mixture for the inner sole layer is infected into the thus created mould cavity. By displacing the bottom sole layer upwards, the mould cavity is made smaller to match the size of the inner sole layer; after partial solidification of the rubber mixture the lower delimitation means of the inner sole layer is lowered by a certain distance and the inner sole is allowed to expand in controlled manner with the mould cavity enlarged. The apparatus according to the invention (Fig. 6) provides an intermediate piece (1) which is arranged between lateral mould parts (16a) and the bottom die (2) and can traverse both horizontally and vertically.
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