Patent ID: 6315542
Filing Date: 2001-11-13
Classification: B29C,Y10S

Abstract:
A gas injection mold structure for use in gas auxiliary injection molding, comprising:a mold, including a mold upper surface; andan injection device, including:a head having an upper surface, a lower surface, and a periphery;a cylindrical body extending downwards from the lower surface of the head and being formed with external threads along at least part of a longitudinal region around the body; wherein:the mold is vertically formed with an opening in the mold so as to define a cylindrical cell integral to the mold and extending from the mold upper surface for receiving the cylindrical body, the cylindrical cell having an inner wall being formed with internal threads along at least part of a vertical region of the mold thereof for matching with the external threads for removable threading engagement with the cylindrical body; andthe gas injection mold structure further comprises a plurality of vertical grooves and corresponding lateral grooves, each vertical groove being defined between the cylindrical body and an inner wall of the cylindrical cell and each lateral groove being defined between the lower surface of the head and the mold upper surface, whereby when the cylindrical body of the gas injection device is threaded into the cylindrical cell of the mold, each of the vertical grooves and the corresponding lateral grooves jointly form a continuous passage originating from a bottom of the cylindrical cell to the periphery of the head.