Patent ID: 11911946
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. An injection molding method for moving a torpedo piston inside a cylinder to plasticize a resin material, thereby forming a molten resin, and then extruding the molten resin, the injection molding method comprising:
closing, when the resin material is plasticized, a supply hole of the resin material by the closing part configured to move together with the torpedo piston, the supply hole being formed in a side wall part of the cylinder; and
closing, when the supply hole is closed by the closing part, the exhaust hole communicating a space in the cylinder on the side of the other end part thereof relative to the torpedo piston with an outside by an insertion part configured to move together with the torpedo piston and be inserted into the exhaust hole.