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

Claim 0:
1. An injection molding machine comprising:
a cylinder configured to accommodate a resin material;
a torpedo piston configured to move inside the cylinder to plasticize the resin material, to thereby form a molten resin, and then extrude the molten resin; and
an injection part configured to inject the molten resin, the injection part being disposed in one end part of the cylinder,
the injection molding machine further comprising:
a supply hole through which the resin material is supplied to an inside of the cylinder, the supply hole being formed in a side wall part of the cylinder; and
a closing part configured to, when the torpedo piston moves to a side of an other end part of the cylinder in order to plasticize the resin material, move together with the torpedo piston and close the supply hole;
an exhaust hole configured to communicate a space in the cylinder on the side of the other end part thereof relative to the torpedo piston with an outside; and
an insertion part configured to move together with the torpedo piston and be inserted into the exhaust hole to thereby block the exhaust hole when the closing part closes the supply hole.