Mold opening/closing device and method for controlling mold opening/closing device
AssigneeNissei Asb Machine Co., Ltd.
InventorYasuhiro Hidaka
Life of this patent
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Abstract
A control method for a mold opening/closing device including a hydraulic cylinder that opens and closes a mold, a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil, and a controller that controls the hydraulic drive device, wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region, and causes speed change rate per unit time in the second half portion to be smaller than in the first half portion.
Claims10
A control method for a mold opening/closing device, the mold opening/closing device including:
- a hydraulic cylinder that opens and closes a mold;
- a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil;
- and
- a controller that controls the hydraulic drive device,
- wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region,
- in the control in the deceleration region when the mold is closed, the speed is changed nonlinearly in the first half portion,
- the controller causes speed change rate per unit time in the second half portion to be smaller than in the first half portion and controls the speed change in the second half portion to be closer to linear than the speed change in the first half portion, and
- the speed change in the second half portion is non-zero.
A mold opening/closing device comprising:
- a hydraulic cylinder that opens and closes a mold;
- a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil;
- and
- a controller that controls the hydraulic drive device,
- wherein the hydraulic cylinder drives the mold along a vertical direction,
- wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region,
- in the control in the deceleration region when the mold is closed, the speed is changed nonlinearly in the first half portion,
- the controller causes speed change rate per unit time in the second half portion to be smaller than in the first half portion and controls the speed change in the second half portion to be closer to linear than the speed change in the first half portion, and
- the speed change in the second half portion is non-zero.
Dependencies are inferred from the claim text.