| 摘要 |
Through the use of a method for the manufacture of a foamed shaped polymer part with liquid silicone rubber LSR as the molding composition a polymer part can be manufactured which has a degree of foaming of from to 70% by volume and/or a Shore A hardness reduced by at least 10% in relation to a shaped polymer part of non-foamed LSR. In this method the-molding composition is present prior to processing in the form of two separate components (A, B). At the start of a preparation these components are conveyed separately in two streams under elevated pressure an d in this a substantially continuous impregnation with an expanding agent (C ) is carried out - in both or only one of the components. After the impregnation the two streams (32a, 32b) are furthermore led together and also mixed together under elevated pressure. Finally, while reducing the pressure, the reactive mixture formed during mixing is injected into a heated cavity of a shape giving tool in which the molding composition is simultaneously foamed with a cross-linking reaction. The shaped polymer part which is manufactured forms a body which is designed in accordance with its purpose, with regard to an interaction with an activated object or with a further non-activated object.
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