MOULD HALF-BLOCK FOR THE INJECTION MOULDING OF A THERMOPLASTIC OPTICAL ELEMENT AND THE MOULD COMPRISING ONE SUCH HALF-BLOCK

摘要

The invention relates to a mould half-block comprising at least one mould cavity which is defined transversely by the useful surface of a shell. The aforementioned shell, which is provided with intrinsic, dual-purpose heat transfer means (heating and cooling), comprises: a base bearing all of the heat transfer means of the shell; and a removable insert which is mounted on the base and which bears said useful surface. The insert comprises no intrinsic heat transfer means and is thermally regulated solely by means of heat transfer with said base. Moreover, the insert, which is in the form of a cap, covers at least a head portion of the base and the heat transfer means of the base determine the head portion of the base that is covered by the insert.