Injection molding machine and control method for injection molding machine
AssigneeFanuc Corporation
InventorMitsuhiro ONO
Life of this patent
Estimating the term…
Abstract
An injection molding machine is equipped with a screw having a spline shaft formed with a spline on an outer circumferential surface, a bush having a spline hole formed with a spline on an inner circumferential surface, a linear motion motor for moving the bush in an axial direction of the screw, a rotational motion motor for rotating the bush about an axis of the screw, and a motor control unit which, in the case of fitting the spline shaft in the spline hole, controls the linear motion motor to advance the bush in a direction approaching the screw in a state that the bush and the screw are separated, and which controls the rotational motion motor to rotate the bush when the acquired output torque becomes equal to or larger than a first predetermined torque.
Claims14
An injection molding machine comprising:
- a screw including a spline shaft formed with a spline on an outer circumferential surface;
- a bush including a spline hole formed with a spline on an inner circumferential surface;
- a linear motion motor configured to move the bush in an axial direction of the screw;
- a rotational motion motor configured to rotate the bush about an axis of the screw;
- an output torque acquisition unit configured to acquire an output torque of the linear motion motor;
- and
- a motor control unit configured to control the linear motion motor and the rotational motion motor,
- wherein in a case of fitting the spline shaft in the spline hole, the motor control unit is configured to control the linear motion motor to advance the bush in a direction approaching the screw in a state that the bush and the screw are separated, and to control the rotational motion motor to rotate the bush when the acquired output torque becomes equal to or larger than a first predetermined torque.
A control method for an injection molding machine that molds a molding,
- the injection molding machine comprising:
- a screw including a spline shaft formed with a spline on an outer circumferential surface;
- a bush including a spline hole formed with a spline on an inner circumferential surface;
- a linear motion motor configured to move the bush in an axial direction of the screw;
- a rotational motion motor configured to rotate the bush about an axis of the screw;
- and
- an output torque acquisition unit configured to acquire an output torque of the linear motion motor,
- wherein in a case of fitting the spline shaft in the spline hole,
- the linear motion motor is controlled to advance the bush in a direction approaching the screw in a state that the bush and the screw are separated, and
- the rotational motion motor is controlled to rotate the bush when the acquired output torque becomes equal to or larger than a first predetermined torque.
Dependencies are inferred from the claim text.