Mold clamping device, injection molding machine, and mold clamping method
AssigneeThe Japan Steel Works, Ltd.
InventorSouma MITANI
Life of this patent
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Abstract
A mold clamping device includes two mold platens; a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism; a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism; and a control device configured to: monitor the axial force detected by the axial force detector during injection; and based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control including driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.
Claims10
A mold clamping device comprising:
- two mold platens;
- a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism;
- a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism;
- and
- a control device configured to:
- monitor the axial force detected by the axial force detector during injection;
- and
- based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control comprising driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.
An injection molding machine comprising:
- a mold clamping device configured to clamp a mold;
- an injection device configured to inject an injected material;
- and
- a control device,
- wherein the mold clamping device comprises:
- two mold platens;
- a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism is provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism;
- and
- a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism,
- wherein the control device is configured to:
- monitor the axial force detected by the axial force detector during injection;
- and
- based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control comprising driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.
Dependencies are inferred from the claim text.