Adjustment method for shut-off nozzle, shut-off nozzle, injection device, and injection molding machine

A shut-off nozzle comprising:

• a nozzle portion having an injection flow path in an axial direction formed therein and a needle hole reaching the injection flow path from an outer peripheral surface of the nozzle portion;
• a needle valve movably inserted into the needle hole to open and close the injection flow path;
• a cylinder component configured to drive the needle valve in a moving direction;
• a bracket configured to rotatably support the cylinder component at a rear end;
• and
• a fixing device configured to fix the bracket to a fixing member of an injection device,
• wherein a knock pin is fixed to the fixing member, and the bracket has an elongated guide hole into which the knock pin is inserted, and
• wherein in a case where the fixing device is released, the bracket is allowed to slide by a predetermined width with respect to the fixing member with a slide direction thereof being regulated by the knock pin, and the bracket is configured to be fixed to the fixing member by the fixing device at any slide position.

An injection device comprising:

• a heating cylinder;
• a screw provided in the heating cylinder;
• and
• a shut-off nozzle provided in the heating cylinder, the shut-off nozzle including:
• a nozzle portion having an injection flow path in an axial direction formed therein and a needle hole reaching the injection flow path from an outer peripheral surface of the nozzle portion;
• a needle valve movably inserted into the needle hole to open and close the injection flow path;
• a cylinder component configured to drive the needle valve in a moving direction;
• a bracket configured to rotatably support the cylinder component at a rear end;
• and
• a fixing device configured to fix the bracket to a fixing member of the injection device,
• wherein a knock pin is fixed to the fixing member, and the bracket has an elongated guide hole into which the knock pin is inserted, and
• wherein in a case where the fixing device is released, the bracket is allowed to slide by a predetermined width with respect to the fixing member with a slide direction thereof being regulated by the knock pin, and the bracket is configured to be fixed to the fixing member by the fixing device at any slide position.

An injection molding machine comprising:

• a mold clamping device configured to clamp a mold;
• and
• an injection device configured to inject an injection material, the injection device including:
• a heating cylinder;
• a screw provided in the heating cylinder;
• and
• a shut-off nozzle provided in the heating cylinder, the shut-off nozzle including:
• a nozzle portion having an injection flow path in an axial direction formed therein and a needle hole reaching the injection flow path from an outer peripheral surface of the nozzle portion;
• a needle valve movably inserted into the needle hole to open and close the injection flow path;
• a cylinder component configured to drive the needle valve in a moving direction;
• a bracket configured to rotatably support the cylinder component at a rear end;
• and
• a fixing device configured to fix the bracket to a fixing member of the injection device,
• wherein a knock pin is fixed to the fixing member, and the bracket has an elongated guide hole into which the knock pin is inserted, and
• wherein in a case where the fixing device is released, the bracket is allowed to slide by a predetermined width with respect to the fixing member with a slide direction thereof being regulated by the knock pin, and the bracket is configured to be fixed to the fixing member by the fixing device at any slide position.