In a method for operating an injection moulding machine in the absence of a backflow barrier, plastic melt is injected by a plasticising device into a cavity in a screw antechamber of a plasticising screw adapted to rotate about a longitudinal axis and to move translationally by a drive unit during an injection phase and a holding- pressure phase. A rotational drive of the drive unit is controlled such that a speed of the plasticising screw causes overlay of a backflow of the plastic melt from the screw antechamber back into screw threads of the plasticising screw by an opposing delivery flow as a result of a rotation of the plasticising screw due to a translational injection movement of the plasticising screw. A differential flow is established from the backflow and the opposing delivery flow and influenced at least during the injection phase by influencing the speed of the plasticising screw.

An injection molding machine includes a cylinder; a screw; a rotary driving unit; a reciprocation driving unit; a pressure detector that detects a pressure of a molding material in front of the screw; a control unit that performs a first type of plasticizing process where the screw is moved backward to a predetermined position and rotated at the predetermined position to transfer the molding material forward to reserve the molding material in front of the screw, performs a first type of filling process where the screw is moved forward to inject the molding material reserved in front of the screw in the first type of plasticizing process from the cylinder to be filled in a mold unit, monitors the pressure in the first type of filling process by the pressure detector, and corrects the setting of the first type of filling process based on a monitored result.

An injection molding machine uses a controller to effectively control its operation. The controller may determine and/or receive information regarding the machine's maximum load capacity, and may also determine a current operational load value of the machine. The controller also may determine a number of set points used to operate the machine. The controller may cause the machine to operate at these set points, thereby resulting in the machine operating at or below the maximum load value by adjusting any number of machine parameters associated with the injection molding machine.

An injection molding machine uses a controller to effectively control its operation. The controller may determine and/or receive information regarding the machine's maximum load capacity, and may also determine a current operational load value of the machine. The controller may cause the machine to operate at any number of combinations of settings of operational parameters which result in the machine operating at or below the maximum load value by adjusting any number of machine parameters associated with the injection molding machine based on feedback sensors measuring real-time operating conditions of the machine.

A production management device includes circuitry configured to display, on a display unit, detection results detected by a detection unit in a process of producing a product upon a plurality of products being produced by a production device; and display, upon receiving selection of a detection result or information for identifying the product, a detection result of a first product together with a detection result of a second product and a detection result of a third product on the display unit, the first product being identified by the detection result or the information for identifying the product, the second product being produced by the production device immediately before the first product, and the third product being produced by the production device immediately after the first product.

The present invention discloses a control system and method for injection molding machine. The control method comprises the following steps: establishing a work command according to a plurality of production process parameters; receiving a position information directly from an injection molding machine; and controlling a servo pump to drive the injection molding machine according to the position information and the work command.

A monitoring device for an injection molding machine includes circuitry configured to acquire first data from a sensor provided in an injection molding machine, the first data indicating detection results in a time series; input the first data into a trained model and acquire a first value from the trained model, the first value representing an evaluation of a product, the trained model being trained by machine learning with training data, the training data combining second data and a second value, the second data indicating detection results from the sensor in a time series, and the second value representing an evaluation of the product produced by the injection molding machine; and determine whether an abnormality has occurred in the detection results of the sensor, based on the acquired first value by the inferring unit.

An injection molding machine according to the present embodiment includes an injecting device and a controlling unit, the injection device being configured to inject a material into molds, the controlling unit being configured to control the injecting device and control, based on a past speed setting of an injection speed set in past and a past speed detection result in a molding cycle performed in advance, an injection speed in an injecting process through which the injecting device injects the material into the molds, the past speed detection result being detected in past by a speed sensor configured to detect the injection speed.

An injection molding machine according to the present embodiment includes an injecting device and a controlling unit, the injection device being configured to inject a material into molds, the controlling unit being configured to control the injecting device and control, based on a past speed setting of an injection speed set in past and a past speed detection result in a molding cycle performed in advance, an injection speed in an injecting process through which the injecting device injects the material into the molds, the past speed detection result being detected in past by a speed sensor configured to detect the injection speed.

At least a target torque value Ts for screw rotational torque T and an upper limit value Ru for screw rotational speed R are set beforehand as molding conditions, and the rotation of a screw 3 is controlled during a plasticization process on the basis of the target torque value Ts. A graphic display screen 51 is pop-up displayed when a changeover switch 50 is operated, in addition to a normal waveform display screen 11nn. The graphic display screen 51 is used for displaying data representing changes in at least one of screw position X, the screw rotational torque T, and the screw rotational speed R during the plastination process. The normal waveform display screen 11nn is used for displaying data representing changes in at least one of injection speed V, injection pressure Pp, and mold assembly parting opening amount Lm during molding.