Injection moulding method using surge pressure.

摘要

A surge of high pressure is momentarily applied to a plasticized moulding material injected in a mould cavity (3) immediately after the completion of an injection process so that moulding shrinkage and orientation which are caused in the material in the mould cavity (3) in the course of solidification of the material on cooling can be substantially eliminated to thereby enable super-precision injection moulding.