Control device and control method
AssigneeFanuc Corporation
InventorAtsushi HORIUCHI
Life of this patent
Estimating the term…
Abstract
A control device which is for an injection molding machine and which includes a suck-back control unit that causes a screw which has reached a prescribed measurement position to be sucked back at a prescribed suck-back velocity; a reverse rotation control unit that causes the screw to be reversely rotated on the basis of a prescribed reverse rotation condition value at and after the initiation of the suck-back; a measurement unit that measures a reverse rotation state value of the screw; and a suck-back completion control unit that causes the suck-back to be completed when the reverse rotation state value has reached a threshold value.
Claims14
A control device for an injection molding machine, the injection molding machine comprising a cylinder and a screw configured to rotate and move forward and rearward within the cylinder, the control device being configured to perform a metering of resin inside the cylinder by moving the screw rearward to a predetermined metering position while the screw is being forwardly rotated, the control device comprising:
- a suck-back control unit configured to suck back the screw at a predetermined suck-back speed after the screw has reached the predetermined metering position;
- a reverse rotation control unit configured to perform reverse rotation of the screw based on a predetermined reverse rotation condition value after sucking back of the screw has started;
- a measurement unit configured to measure a reverse rotation state value indicating a reverse rotation state of the screw from a time when the reverse rotation of the screw has been started;
- and
- a suck-back ending control unit configured to cause the sucking back of the screw by the suck-back control unit to end, at a time when the reverse rotation state value has reached a threshold value.
A control method for an injection molding machine, the injection molding machine comprising a cylinder and a screw configured to rotate and move forward and rearward within the cylinder, the control method for performing a metering of resin inside the cylinder by moving the screw rearward to a predetermined metering position while the screw is being forwardly rotated, the control method comprising:
- a suck-back control step of sucking back the screw at a predetermined suck-back speed after the screw has reached the predetermined metering position;
- a reverse rotation control step of performing reverse rotation of the screw based on a predetermined reverse rotation condition value after sucking back of the screw has started;
- a measurement step of measuring a reverse rotation state value indicating a reverse rotation state of the screw from a time when the reverse rotation of the screw has been started;
- and
- a suck-back ending step of causing the sucking back of the screw by the suck-back control step to end, at a time when the reverse rotation state value has reached a threshold value.
Dependencies are inferred from the claim text.