MOULD AND METHOD FOR MANUFACTURING BICOMPONENT PREFORMS BY OVERMOULDING, AND THUS OBTAINED BICOMPONENT PREFORM

摘要

A mould has a primary moulding cavity (1) connected to a first hot channel (10) for supplying a primary moulding compound, an overmoulding cavity (2) connected to a second hot channel (20) for supplying an overmoulding compound, and a punch (3) designed to be introduced first into said primary moulding cavity (1) for moulding a first layer (P1) of primary moulding compound, and then to be introduced, together with said first layer (P1) arranged thereon, into said overmoulding cavity (2), for overmoulding a second layer (P2) made of an overmoulding compound. At least one supporting member (4) projects from an inside surface of the primary moulding cavity (1) so as to contact said punch (3) and support same during at least part of the operation during which the first layer (P1) is moulded.