An injection molding machine and an additional injection device are provided such that a power interruption signal is output to a controller of the injection molding machine or the additional injection device on the destination when it is detected that a movable door is opened and a state of position confirmation means for the movable door is transmitted to the injection molding machine or the additional injection device on the destination through a communication line. Thus, the state of the position confirmation means can be transmitted and notified without decreasing maintainability.

A temperature control method includes: a step of obtaining, by means of PID control, a first energization rate based on a first temperature difference between an actually measured temperature and a target temperature; a step of obtaining a second energization rate based on a second temperature difference between the ambient temperature of the environment in which a heating barrel is disposed and the target temperature; a step of obtaining a corrected energization rate on the basis of the result of comparison of the first energization rate and the second energization rate; and a step of controlling the electrical power to be supplied to a heater on the basis of the corrected energization rate. The corrected energization rate is set to any of predetermined first, second, and third conditions on the basis of the comparison result.

A system is described comprising an actuator with a piston linearly movable and a needle shutter connected to the piston for regulating the injection flow of molten material from a nozzle into a mold. By a supply circuit pressurized fluid is brought to the piston to move it back and forth. A solenoid valve is connected to the supply circuit and configured so that in resting condition it leaves open a fluid drainage path for bringing the shutter to a closing position.

An injection molding machine includes a control device configured to output at least one set of operator support information. The operator support information includes a set of support target setting data and control target predicted amount of power. The support target setting data includes at least one piece of setting data configuring a molding condition. The control target predicted amount of power is a predicted amount of power consumption of a control target controlled in association with the support target setting data with respect to a change in the support target setting data.

A motor driving apparatus includes a first motor group including a number N of individual servo motors, a second motor group including a number N of individual second servo motors driven synchronously with the servo motors, and an inverter control unit. The inverter control unit controls a first switching total value and a second switching total value to be reversed in positive/negative sign. The first switching total value is obtained by subtracting the number of semiconductor switching devices opened in circuit on low potential side from the number of semiconductor switching devices opened in circuit on first high potential side, corresponding to the first motor group. The second switching total value is obtained by subtracting the number of semiconductor switching devices opened in circuit on high potential side from the number of second switching elements opened in circuit on low potential side, corresponding to the second motor group.

A motor driving apparatus includes a first motor group including a number N of individual servo motors, a second motor group including a number N of individual second servo motors driven synchronously with the servo motors, and an inverter control unit. The inverter control unit controls a first switching total value and a second switching total value to be reversed in positive/negative sign. The first switching total value is obtained by subtracting the number of semiconductor switching devices opened in circuit on low potential side from the number of semiconductor switching devices opened in circuit on first high potential side, corresponding to the first motor group. The second switching total value is obtained by subtracting the number of semiconductor switching devices opened in circuit on high potential side from the number of second switching elements opened in circuit on low potential side, corresponding to the second motor group.

When acquiring a DR request for adjusting a use electric power amount from an electric power source, a control device executes an electric power control depending on the DR request.

A temperature control method includes: a step of obtaining, by means of PID control, a first energization rate based on a first temperature difference between an actually measured temperature and a target temperature; a step of obtaining a second energization rate based on a second temperature difference between the ambient temperature of the environment in which a heating barrel is disposed and the target temperature; a step of obtaining a corrected energization rate on the basis of the result of comparison of the first energization rate and the second energization rate; and a step of controlling the electrical power to be supplied to a heater on the basis of the corrected energization rate. The corrected energization rate is set to any of predetermined first, second, and third conditions on the basis of the comparison result.

A method is described for operating an injection moulding machine, which has one or more movable machine parts which can be moved by suitable drives along specifiable travelling distances. Movement of a movable machine part is repeated cyclically. In order to reduce the movement times of the movable machine parts to a minimum, provision is made for one or more of the movable machine parts to successively reduce the power reserves of one or more of the drives associated with a movable machine part, until a specifiable minimum of power reserve is reached, wherein the minimum can be zero. In each cycle, the power reserve of the drive or drives is determined and is successively reduced, in particular from cycle to cycle. A movable platen, an ejector, a core puller, a plasticizing screw and/or an injection piston can be provided as movable machine part.

A plastics processing plant and method for avoiding parallel occurrence of load peaks of a plastics processing machine, in particular an injection-molding machine and at least one production resource. The injection-molding machine, which includes a temperature control unit, hot runner system, cooling unit, flow controller, granule dryer, mold dryer, metering device, robot, and automation system, is connected via an electrical line or data line to the at least one production resource directly or indirectly via an external work cell controller. The injection-molding machine or the external work cell controller transmits one or several control signals or internal operating states with increased load requirement, to the production resource so that the production resource performs a load shift, load reduction or load shedding at the times of the increased load requirement of the injection-molding machine.