Die stamper assembly, injection compression moulding apparatus and method of manufacturing optical data carriers

摘要

The invention relates to a die stamper assembly (1) provided with a first die part (2) for holding a first stamper (5), a second die part (3) for mounting a second stamper (6), the first die part cooperating with the second die part to define a mould cavity (4) between the first and second die parts. The first stamper is mounted at a boundary of the first die part and the second stamper is mounted at a boundary of the second die part. Furthermore, the die stamper assembly comprises a venting ring (7) configured around and moveable with respect to the first die part and defining an outer boundary of the mould cavity. The die stamper assembly further comprises a venting holder (71) arranged for holding the circumference of the first stamper and positioned between the first die part and the venting ring to attach the first stamper on the first die part to allow venting of air escaping from the mould cavity and to prevent leaking of plastic material out of the mould cavity.