Resin intrusion prevention structure, injection device, and injection molding machine
AssigneeThe Japan Steel Works, Ltd.
InventorsYousuke SHIMOAKA, Kiyotaka NAKAYAMA, Masahiko TAKETANI
Life of this patent
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Abstract
A resin intrusion prevention structure for preventing resin intrusion into a heater in a shut-off nozzle, the shut-off nozzle including a nozzle body having an injection flow path, through which resin flows, in an axial direction and a shut-off valve configured to open and block the injection flow path. The resin intrusion prevention structure is provided in a vicinity of a sliding exposed portion, which is exposed to an outer circumferential surface of the nozzle body in a sliding portion, and is configured to prevent the resin leaking from the sliding exposed portion from intruding into the heater provided in the shut-off nozzle.
Claims20
A resin intrusion prevention structure for preventing resin intrusion into a heater in a shut-off nozzle, the shut-off nozzle comprising a nozzle body having an injection flow path, through which resin flows, in an axial direction and a shut-off valve configured to open and block the injection flow path,
- wherein the resin intrusion prevention structure is provided in a vicinity of a sliding exposed portion and is configured to prevent the resin leaking from the sliding exposed portion from intruding into the heater provided in the shut-off nozzle, the sliding exposed portion being exposed to an outer circumferential surface of the nozzle body in a sliding portion between the nozzle body and a drive member, the drive member being configured to drive the shut-off valve.
An injection device comprising:
- a control device;
- a heating cylinder;
- a screw disposed in the heating cylinder;
- a shut-off nozzle provided to the heating cylinder;
- a heater provided in the shut-off nozzle;
- and
- a resin intrusion prevention structure for preventing resin intrusion into the heater provided in the shut-off nozzle,
- wherein the shut-off nozzle comprises:
- a nozzle body having an injection flow path, through which the resin flows, in an axial direction;
- and
- a shut-off valve configured to open and block the injection flow path, and
- wherein the resin intrusion prevention structure is provided in a vicinity of a sliding exposed portion and is configured to prevent the resin leaking from the sliding exposed portion from intruding into the heater, the sliding exposed portion being exposed to an outer circumferential surface of the nozzle body in a sliding portion between the nozzle body and a drive member, the drive member being configured to drive the shut-off valve and the nozzle body.
An injection molding machine comprising:
- an injection device configured to inject resin;
- a mold clamping device configured to clamp a mold;
- and
- a control device,
- wherein the injection device comprises:
- a heating cylinder;
- a shut-off nozzle provided to the heating cylinder;
- a screw disposed in the heating cylinder;
- a heater provided in the shut-off nozzle;
- and
- a resin intrusion prevention structure for preventing resin intrusion into the heater provided in the shut-off nozzle,
- wherein the shut-off nozzle comprises:
- a nozzle body having an injection flow path, through which the resin flows, in an axial direction;
- and
- a shut-off valve configured to open and block the injection flow path,
- wherein the resin intrusion prevention structure is provided in a vicinity of a sliding exposed portion and is configured to prevent the resin leaking from the sliding exposed portion from intruding into the heater, the sliding exposed portion being exposed to an outer circumferential surface of the nozzle body in a sliding portion between the nozzle body and a drive member, the drive member being configured to drive the shut-off valve.
Dependencies are inferred from the claim text.