Process and apparatus for automatically producing one-piece mouldings from two or more elastomers having different properties and Shore hardnesses

摘要

The invention relates to a process and an apparatus for automatically producing one-piece mouldings from at least two or more elastomers having different properties and Shore hardnesses, obtained by crosslinking LSR mixes. In order to be able to produce any mouldings automatically as a one-piece moulding, the invention provides that the first LSR mix is injected by means of a first injection unit of an injection-moulding machine into receiving spaces provided for the purpose in a closed, heated injection mould comprising a fixed mould half and an adjustable mould half, that after a first predetermined crosslinking time the adjustable mould half of the injection mould is altered in such a way that, following on from the already crosslinked elastomer parts, new receiving spaces are created, which are filled with the further LSR mix by means of a second or several successive injection units and that after a second predetermined crosslinking time the injection mould is opened and the bonded-together elastomer parts are ejected as one-piece mouldings.