A remote controller can be provided on any apparatus that employs feedback control from a native controller to add functionality to the apparatus where the native controller is not capable of providing such functionality independently.

An injection molding machine having vent mechanism includes a plastication device, an injection device, a junction, a vent-up sensor, and a controller. The vent-up sensor detects vent-up. When the vent-up is detected, the controller switches from normal conditions to vent-up suppression conditions. The vent-up suppression conditions have at least one of the followings: increasing a rotational speed of the plastication screw to be higher than that in the normal conditions; using retreat-metering when the retreat-metering is not performed in the normal conditions, wherein in the retreat-metering, in addition to a pressure of the resin material, a force in a retreat direction is applied to the injection plunger to move the injection plunger at a predetermined retreat speed in the metering; and increasing the retreat speed of the injection plunger to be higher than that in the normal conditions when the retreat-metering is performed in the normal conditions.

A control device for an injection molding machine including a cylinder into which a resin is supplied, a nozzle disposed at a distal end of the cylinder, and a screw that moves forward and rearward inside the cylinder, the injection molding machine performing metering of the resin while the resin is being melted inside the cylinder, by causing the screw to be moved rearward to a metering position, so as to keep the resin pressure at a metering pressure, includes a calculation unit configured to calculate a suck back distance or a suck back time period that achieves drawing in of a target volume of the resin inside the nozzle toward the cylinder, and a suck back control unit configured to cause the screw to be sucked back, based on the suck back distance or the suck back time period, after the screw has reached the metering position.

A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder. Metering of plastic granulate fed to the plasticizing unit is carried out in dependence on the desired backpressure length in the plasticizing unit, and the plasticizing unit is operated in underfed mode.

A remote controller can be provided on any apparatus that employs feedback control from a native controller to add functionality to the apparatus where the native controller is not capable of providing such functionality independently.

A method for controlling an injection cycle of an injection molding machine incudes advancing an injection screw axially forward toward an injection nozzle from a shot-size position to an injection position to inject melt from a shot chamber into a hot runner of a mold and from the hot runner to fill cavities of the mold. Then the injection screw is retracted away from the nozzle, from the injection position to a decompression position axially rearward of the shot-size position, to relieve melt pressure in the hot runner. Then the screw is advanced toward the nozzle from the decompression position to an intermediate position axially intermediate the injection position and the shot-size position. The method then includes rotating the screw to re-fill the shot chamber with melt and urge the screw to retract from the intermediate position to the shot-size position.

A control device for an injection molding machine includes a pressure acquisition unit that acquires a resin pressure, a measurement unit that measures an elapsed time period or a rotation amount of the screw from when the screw has reached a predetermined metering position, a reverse rotation control unit that causes the screw to be rotated in reverse from when the screw has reached the predetermined metering position, and a condition determination unit that determines the reverse rotation time period based on a required time period from when the screw has reached the predetermined metering position until when the resin pressure falls to a target pressure, or determines the reverse rotation amount based on a required reverse rotation amount from when the screw has reached the predetermined metering position until when the resin pressure falls to the target pressure.

A reverse rotation condition estimating apparatus includes: a learning model storage unit for storing a learning model for estimating reverse rotation conditions; an acquisition unit for acquiring a predetermined time series data set supplied from an injection molding machine at least during a pressure reducing step; and an estimation unit for estimating the reverse rotation conditions using the predetermined time series data set acquired by the acquisition unit and the learning model stored in the learning model storage unit.

Provided is an injection molding method for resin that contains reinforcing fiber, the method being capable of easily eliminating uneven distribution of added components. The injection molding method is provided with: a plasticizing step for supplying resin pellets P and added components to a cylinder equipped with a screw 10, which has a rotating axis as the center is capable of rotating normally and in reverse, and generating molten resin by rotating the screw 10 in the normal direction; and an injecting step for injecting the molten resin M comprising the added components into a cavity. In the plasticizing step, a reverse rotation operation for reversing the rotation of the screw 10 is performed or a screw-stopping operation of stopping the normal rotation of the screw 10 is performed with a prescribed timing and for a prescribed period.

When an injection molding machine performs molding, the mold clamping force on the mold is adjusted on the basis of a mold displacement of the mold or the injection peak pressure and injection foremost position so that the molding is performed without causing flash and by an appropriate mold clamping force with which energy can be reduced. The amount of mold displacement and also the injection peak pressure and the injection foremost position are monitored during automatic operation. If there occurs no mold displacement change exceeding a threshold or if there occurs no injection peak pressure anomaly or injection foremost position anomaly exceeding thresholds, the automatic operation is continued. If the mold displacement change occurs or if the injection peak pressure anomaly and the injection foremost position anomaly occur, the operation of the injection molding machine is stopped.