To provide an injection mold constituted so as not only to thermally insulating the heating and cooling parts in a valve gate type mold but also to certainly control the temperature of a gate part.
In this valve gate type mold, the gap part 10B communicating with a cavity C is provided between the outside of a valve casing member 30, which houses a valve pin 40 for closing a gate G and has a resin passage 31c, and a fixed mold member 10 for constituting the cavity C. An annular sealing ring 50 for closing the gap part 10B on the way thereof is arranged along the peripheral direction of the valve casing member 30 and a metal receiving seat 60 formed into an annular shape comprising a porous metal body is provided between the annular sealing ring 50 and the valve casing member 30.
YAMAMOTO KUNIO
KATO MASAAKI
Tadashi Takahashi
Masakazu Aoyama
Akihiko Eguchi
Hideyuki Sugiura
Yasuhiko Murayama
Noriko Yanai
Next Patent: INJECTION MOLD AND ITS MANUFACTURING METHOD