Prodn. of thin two=coloured mouldings - by centrifugally casting onto heated covering mould, two coloured polymer e.g. powders sepd. by dividing wall in attached container

摘要

Thin-walled plastic articles are produced by tilting an open mould with a container which closes its open side and contains polymer powder, granules, or liq., so that the polymer is deposited on the inside face of the mould and forms a skin. This inside face is divided into at least two parts by at least one plastic section; these parts are coated with differently coloured plastic materials from the container, and the plastic section is reacted or fused with skins formed on the parts of the mould. The assembly also pref. includes a hollow rubber profiled seciton. ADVANTAGE - Procedure enables large and complicated shapes to be produced with two or more differently coloured parts. It does so in one single operation. It eliminates the current problems of non-sharp borders between the colours in existing processes of this typehe