Patent ID: 6793481
Filing Date: 2004-09-21
Classification: B29C

Abstract:
An injection molding die comprising: a first die having a gate; a second die forming, together with said first die, a molding cavity that communicates with said gate; a manifold containing a molding material supply path communicating with said gate; a thermal insulation space disposed between said first die and said manifold; and a valve gate disposed between said first die and said manifold opening and closing said gate;wherein said valve gate comprises: a valve pin passing through said first die and said manifold adapted to open and close said gate; a sealing member mounted on said manifold where said valve pin passes through said manifold adapted to provide a seal between said manifold and said first die; and a heater mounted on said manifold adapted to heat molding material flowing through said supply path; wherein said sealing member comprises a pressure-receiving section facing said supply path of said manifold; and said sealing member is adapted to provide a seal between said manifold and said first die as a result of pressure from said molding material flowing through supply path and received by said pressure-receiving section.