摘要:
An injection rate (cm3/sec) of a screw feeder at the time of starting an injection is the largest and the injection rate (cm3/sec) thereof gradually or sequentially decreases until an end of injection so that a temperature of a melted resin reaching the end portion of a cavity decreases within a range where the melted resin is not solidified.
摘要:
An injection rate (cm3/sec) of a screw feeder at the time of starting an injection is the largest and the injection rate (cm3/sec) thereof gradually or sequentially decreases until an end of injection so that a temperature of a melted resin reaching the end portion of a cavity decreases within a range where the melted resin is not solidified.
摘要:
A control system for injection molding machines comprises a memory means (16) for storing set values. Further, a signal input for the transmission of actual values to the control system is provided. A first control means (18) is used for the transmission of a control field with consideration to previous values. A second control means (20) is provided for the transmission of a correction value, in particular with consideration to a deviation of the actual value from the set value. A correlation means (22) serves to correlate the control field values with the correction value for outputting a control variable.
摘要:
A reciprocating apparatus comprises a reciprocating member, a drive mechanism, an input device, a work-switch position calculating unit configured to calculate a work-switch position for the drive mechanism, a direction-switch position calculating unit configured to calculate a direction-switch position, a remaining-distance calculating unit configured to calculate a remaining distance that is a difference between the direction-switch position calculated by the direction-switch position calculating unit and a direction-switch position input at the input device, a target direction-switch position calculating unit configured to add the remaining distance, to the direction-switch position calculated by the direction-switch position calculating unit, thereby to calculate a target direction-switch position, and a corrected position calculating unit configured to calculates a corrected work-switch position for the drive mechanism so that the drive mechanism may cause the reciprocating member to start moving in the opposite direction at the target direction-switch position calculated by the target direction-switch position calculating unit.
摘要:
A reciprocating apparatus comprises a reciprocating member, a drive mechanism, an input device, a work-switch position calculating unit configured to calculate a work-switch position for the drive mechanism, a direction-switch position calculating unit configured to calculate a direction-switch position, a remaining-distance calculating unit configured to calculate a remaining distance that is a difference between the direction-switch position calculated by the direction-switch position calculating unit and a direction-switch position input at the input device, a target direction-switch position calculating unit configured to add the remaining distance, to the direction-switch position calculated by the direction-switch position calculating unit, thereby to calculate a target direction-switch position, and a corrected position calculating unit configured to calculates a corrected work-switch position for the drive mechanism so that the drive mechanism may cause the reciprocating member to start moving in the opposite direction at the target direction-switch position calculated by the target direction-switch position calculating unit.
摘要:
A control system for injection molding machines comprises a memory means (16) for storing set values. Further, a signal input for the transmission of actual values to the control system is provided. A first control means (18) is used for the transmission of a control field with consideration to previous values. A second control means (20) is provided for the transmission of a correction value, in particular with consideration to a deviation of the actual value from the set value. A correlation means (22) serves to correlate the control field values with the correction value for outputting a control variable.
摘要:
An electro-mechanical drive apparatus uses a single variable speed motor, two one-way clutches, a hydraulic pump stack and a hydraulic accumulator to provide both hydraulic power for linear motion axes and rotation of a driven element of an electromechanical drive system in an injection molding machine. When engaged, the first one-way clutch couples the drive motor to the pump stack, while the second one-way clutch couples the motor to the driven element. During rotation of the drive motor in a forward direction, (a) the first one-way clutch engages, rotating the shaft of the hydraulic pump stack to power the machine's hydraulic systems and charge an accumulator; and (b) the second one-way clutch slips. When the drive motor is rotated in a reverse direction, (a) the second one-way clutch engages, rotating the driven element, and (b) the first one-way clutch slips.
摘要:
An electro-mechanical drive apparatus uses a single variable speed motor, two one-way clutches, and a hydraulic accumulator to provide both hydraulic power for the linear motion axes and rotation of the plasticizing screw in an injection molding machine. When engaged, the first one-way clutch couples the drive motor to the pump stack, while the second one-way clutch couples the motor to the feed screw. During rotation of the drive motor in a forward direction; (a) the first one-way clutch engages, rotating the shaft of the hydraulic pump stack to power the machines hydraulic systems and charge the accumulator; and (b) the second one-way clutch slips. When the drive motor is rotated in a reverse direction, (a) the second one-way clutch engages, rotating the feed screw, and (b) the first one-way clutch slips. Preferably, the drive apparatus is associated with a double shaft motor mounted adjacent separate drive couplings for the feed screw and hydraulic pump stack.
摘要:
An acceleration distance for acceleration at a set acceleration rate, required for an ejection start position passing speed in an ejection start position, is obtained, and a position behind the ejection start position by the acceleration distance is set as an advance start position of an ejector. Thus, an ejector plate can start to move at an optimal speed.
摘要:
A mold fastening device has a fixed die plate, a rear plate, a movable die plate that can move back and forth, a toggle mechanism, and a drive motor that drives a cross-head. The position where the cross-head should be stopped is associated with the rate at which to accelerate the cross-head from that position or the rate at which to decelerate the cross-head to that position. The cross-head is operated at an acceleration that corresponds to that position. The drive motor is thereby driven at a constant output torque, regardless of the position of the movable die plate. Further, the time for opening and closing metal molds can be shortened.