during parison extrusion and the blowing process. Also, the formation of the pinch-off weld in the mould has to be
ensured for a good part quality. The uncured solid silicone rubber shows no sufficient strength, stretchability or
elasticity. For an improved processing, the rubber is therefore provided with a two-stage peroxide or platinum
catalysed (not presented in this paper) cross-linking system. Via a preliminary cross-linking a wide-meshed
molecular network is built before forming which enables the parison extrusion and the forming of the part. The
complete cross-linking of the solid silicone rubber as well as the formation of the pinch-off weld take place in the
heated mould.