Shut-off nozzle, injection device, and injection molding machine
AssigneeThe Japan Steel Works, Ltd.
InventorKiyotaka Nakayama
Life of this patent
Estimating the term…
Abstract
A shut-off nozzle includes a nozzle body portion having an in-nozzle flow path formed therein, and a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path. A cylindrical portion is formed in the vicinity of a tip portion of the needle valve. A cylindrical hole portion is formed in the vicinity of a tip portion of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole. The cylindrical portion is configured to be fitted into the cylindrical hole portion in a case where the needle valve is driven in a forward direction.
Claims15
A shut-off nozzle comprising:
- a nozzle body portion having an in-nozzle flow path formed therein;
- and
- a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path,
- wherein a cylindrical portion is formed in the vicinity of a tip portion of the needle valve,
- wherein a cylindrical hole portion is formed in the vicinity of a tip portion of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole,
- wherein the cylindrical portion is configured to be fitted into the cylindrical hole portion in a case where the needle valve is driven in a forward direction to form a mechanical seal portion having an annular gap with a flow resistance sufficient to prevent resin flow.
An injection device comprising:
- a heating cylinder;
- a screw inserted in the heating cylinder;
- and
- a shut-off nozzle provided in the heating cylinder,
- wherein the shut-off nozzle comprises:
- a nozzle body portion having an in-nozzle flow path formed therein;
- and
- a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path,
- wherein a cylindrical portion is formed in the vicinity of a tip of the needle valve,
- wherein a cylindrical hole portion is formed in the vicinity of a tip of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole,
- wherein in a case where the needle valve is driven in a forward direction, the cylindrical portion is fitted into the cylindrical hole portion to form a mechanical seal portion having an annular gap with a flow resistance sufficient to prevent resin flow.
An injection molding machine comprising:
- an injection device configured to inject resin;
- and
- a mold clamping device configured to clamp a mold,
- wherein the injection device comprises:
- a heating cylinder;
- a screw inserted in the heating cylinder;
- and
- a shut-off nozzle provided in the heating cylinder,
- wherein the shut-off nozzle comprises:
- a nozzle body portion having an in-nozzle flow path formed therein;
- and
- a needle valve that is inserted into the nozzle body portion coaxially with the nozzle body portion and is configured to open and close an outlet of the in-nozzle flow path,
- wherein a cylindrical portion is formed in the vicinity of a tip portion of the needle valve,
- wherein a cylindrical hole portion is formed in the vicinity of a tip portion of the in-nozzle flow path, the cylindrical hole portion being a cylindrical hole,
- wherein the cylindrical portion is configured to be fitted into the cylindrical hole portion in a case where the needle valve is driven in a forward direction to form a mechanical seal portion having an annular gap with a flow resistance sufficient to prevent resin flow.
Dependencies are inferred from the claim text.