Method of mold opening/closing speed control
AssigneeFanuc Corporation
InventorYoshiharu Inaba
Life of this patent
Estimating the term…
Abstract
A method of mold opening/closing speed control wherein an opening/closing speed switching position for molds in a mold clamping unit in an injection molding apparatus can be taught by a control device. The control device is set in a teaching mode (101), a servo motor (M) is driven at a low speed to move (102) the molds, speed switching position P1, P2 and P3 are stored (103, 104, 205, 106, 109) by a teaching device and opening/closing speed control of the molds is performed (110, 123) by the servo motor in accordance with the stored positions.
Claims14
A method of controlling a mold opening/closing speed in an injection apparatus in which molds are moved into and out of contact, comprising the steps of:
- (a) moving at least one of the molds at a first speed and storing at least one acceleration/deceleration position along the path of movement of the mold as the mold is moved during a teaching mode of operation;
- (b) opening/closing the molds during an operation mode, said opening/closing step comprising the steps of:
- (b1) detecting the position of the at least one of the molds along its path of travel;
- (b2) controlling the opening/closing speed of the at least one mold in accordance with the detected position of the at least one mold, by accelerating/decelerating the opening/closing speed of the mold to accelerate or decelerate the mold when it is detected that the mold is passing the at least one acceleration/deceleration position.
A method of setting acceleration and deceleration positions in an injection molding machine arranged to move a carrier mounted with a first mold relative to a base mounted with a second mold in accordance with a predetermined mold moving instruction, and to increase and decrease a predetermined moving speed of the carrier at at least one pair of acceleration and deceleration positions, said method comprising the steps of:
- (a) initiating movement of the carrier relative to the base at a predetermined speed in a teaching mode;
- (b) detecting a moving position of the carrier as the carrier is moved by executing said step (a);
- and
- (c) storing the moving position of the carrier detected in step (b) when a teaching device is manually operated, as a corresponding one of the at least one pair of acceleration and deceleration positions, whereby a corresponding one of increase and decrease of the predetermined speed of the carrier is executed when the carrier reaches the stored moving position as the carrier is moved in accordance with the mold moving instruction.
Dependencies are inferred from the claim text.