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
Estimating the term…
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 configured to prevent the resin leaking from a sliding exposed portion of the shut-off nozzle 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.
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 configured to prevent the resin leaking from a sliding exposed portion of the shut-off nozzle 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 configured to prevent the resin leaking from a sliding exposed portion of the shut-off nozzle 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.