Injection molding machine and screw control method for injection molding machine
AssigneeFanuc Corporation
InventorsKodai Nanri, Junpei Maruyama
Life of this patent
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Abstract
An injection molding machine includes a screw inserted in an injection cylinder and configured to be movable in an axial direction of the screw, a motor configured to move the screw, a torque detection unit configured to detect a torque of the motor, a position detection unit configured to detect a position of the screw, a motor drive control unit configured to drive the motor to thereby advance the screw to a foremost position in a direction of injection, a processor, and a memory. The processor and memory are configured to determine that unmelted resin remains inside the injection cylinder if the torque of the motor becomes equal to or greater than a limit torque while the screw is advancing to the foremost position.
Claims8
An injection molding machine comprising:
- a screw inserted in an injection cylinder and configured to be movable in an axial direction of the screw;
- a motor configured to move the screw;
- a torque detection unit configured to detect a torque of the motor;
- a position detection unit configured to detect a position of the screw;
- a motor drive control unit configured to drive the motor to thereby advance the screw to a foremost position in a direction of injection;
- and
- a processor and a memory configured to determine that unmelted resin remains inside the injection cylinder if the torque of the motor becomes equal to or greater than a limit torque while the screw is advancing to the foremost position.
A screw control method for controlling screw movement in an injection molding machine which includes:
- a screw inserted in an injection cylinder and configured to be movable in an axial direction of the screw;
- a motor configured to move the screw;
- a torque detection unit configured to detect a torque of the motor;
- and a position detection unit configured to detect a position of the screw,
- the screw control method comprising:
- a motor drive control step of driving the motor to thereby advance the screw to a foremost position in a direction of injection;
- and
- a determination step of determining that unmelted resin remains inside the injection cylinder if the torque of the motor becomes equal to or greater than a limit torque while the screw is advancing to the foremost position.
Dependencies are inferred from the claim text.