Control method and drive control apparatus of hydraulic injection molding machine
AssigneeNissei Plastic Industrial Co., Ltd.
InventorsHiroyuki Miyazaki, Satomi Sakaki, Kenichi Hayashi, Isamu Komamura
Life of this patent
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Abstract
When the deceleration start point is reached, the meter-in side of the hydraulic driving actuator is subjected to a flow rate control to thereby start the deceleration control processing. The position to which the movable unit is moved is detected to use a speed instruction corresponding to the movement position to subject the hydraulic driving actuator to a meter-in control. The position to which the movable unit is moved is detected to calculate the moving speed of the movable unit. Based on the speed instruction, the moving speed is subjected to the feedback control using the meter-out control to the hydraulic driving actuator.
Claims19
A control method of a hydraulic injection molding machine, comprising the steps of:
- using a hydraulic pump to drive a hydraulic driving actuator to move a movable unit;
- when a deceleration start point is reached during a movement of the movable unit, performing a deceleration control processing to stop the movable unit at a set stop position;
- when a set target position is reached, performing a deceleration completion processing;
- when the deceleration start point is reached, then subjecting a meter-in side of the hydraulic driving actuator to a flow rate control to thereby start the deceleration control processing;
- detecting a movement position of the movable unit;
- calculating a speed of the movable unit;
- calculating a value for a speed instruction corresponding to the movement position to subject the hydraulic driving actuator to a meter-in control;
- and
- based on a difference between the calculated speed of the movable unit and the speed instruction, subjecting the movable unit to a feedback control based on a meter-out control to the hydraulic driving actuator.
A drive control apparatus of a hydraulic injection molding machine, wherein:
- a hydraulic pump is used to drive a hydraulic driving actuator to move a movable unit, when a deceleration start point is reached during the movement of the movable unit, a deceleration control processing is performed to stop the movable unit at a set stop position and, when a set target position is reached, a deceleration completion processing is performed, the drive control apparatus comprising:
- a meter-in circuit connected to the hydraulic driving actuator;
- a meter-out circuit connected to the hydraulic driving actuator;
- and
- a control unit configured to:
- perform, when the deceleration start point is reached, a flow rate control on the meter-in circuit to the hydraulic driving actuator to thereby start a deceleration control processing and
- detect the detect a movement position of the movable unit;
- calculate a speed of the movable unit;
- calculate a value for a speed instruction corresponding to the movement position to perform a meter-in control to the meter-in circuit and,
- based on a difference between the calculated speed of the movable unit and the speed instruction, subject the movable unit to a feedback control based on a meter-out control to the meter-out circuit.
Dependencies are inferred from the claim text.