The invention relates to a system for monitoring the position of the closing unit of an injection-molding machine, by bypassing a light curtain that serves to secure the closing unit and the tool area of the injection-molding machine, wherein the injection-molding machine has at least one molding tool that consists of at least two parts, which tool encloses at least one mold cavity, wherein the injection-molding machine has a programmable logic controller (PLC) for controlling the movement monitoring module (MOC) for indirect position monitoring of the closing unit and of the position of the molding tool parts relative to one another, wherein distance measuring sticks are provided as sensors, the signals of which are processed in the PLC via the MOC, wherein the tool parts must maintain a spacing gap, relative to one another, after the closing pressure has been built up and the mold has been filled, during the subsequent bumping step, which gap has a specific maximal value assigned to it, with the injection-molding machine shutting off if this value is exceeded.

A system for coinjection molding a multi-layer container includes an injection molding apparatus, a camera, and a controller. The injection molding apparatus is configured to coinject a plurality of polymeric materials into a mold cavity to form a multi-layer container including an inner layer, an outer layer, and a barrier layer located between the inner layer and the outer layer. The camera is configured to capture an image indicating a location of the barrier layer within the multi-layer container. The controller is configured to monitor the location of the barrier layer using the image captured by the camera, compare the location of the barrier layer to a threshold location, and provide a control signal to the injection molding apparatus based on the location of the barrier layer relative to the threshold location.

An injection molding apparatus (10) comprising a signal converter (1500) interconnected to a machine controller (MC) of an injection molding machine (IMM) that generates standardized signals (VPS), the signal converter (1500) receiving and converting the standardized signals (VS) to a command signal (MOPCS, PDCVS) that is compatible with a signal receptor or interface of an electrically powered actuator (940e, 941e, 942e) or a signal receptor, interface or driver of a proportional directional control valve (V, V1, V2) that drives a fluid driven actuator (940p, 941p, 942p) to respectively operate the electrically powered actuator (940e, 941e, 942e) or the proportional directional control valve (V, V1, V2) to move in a direction that operates to either begin an injection cycle and to end an injection cycle.

A positioning control device mounted on an industrial machine including a driver including a motor, a movable body movable by the driver, a first detector that detects a position of the movable body based on the amount of driving of the driver, a servo amplifier that performs first feedback control of feedback-controlling driving of the motor based on a first detection value by the first detector, and a second detector that detects a position of the movable body when the movable body comes closer to a target position within a distance or shorter. The positioning control device is configured to position the movable body at the target position and includes a controller that controls the servo amplifier. The controller includes a switching unit that switches control modes between a first control mode performing the first feedback control and a second control mode disabling the first feedback control of the servo amplifier and performing second feedback control of feedback-controlling driving of the motor based on a second detection value by the second detector.

Injection molding system having a flow control apparatus and method that controls the movement and/or rate of movement of a valve pin over the course of an injection cycle to cause the pin to move to one or select positions and/or to control the rate of movement of the pin over the course of the injection cycle. In one embodiment the method includes steps of: a) first controllably operating the actuator to drive the valve pin upstream beginning from the first closed position (50) to be moved to and held in a first selected position (51) for a first selected period of time during the course of an injection cycle, the first selected position (51) being the full open position; b) second controllably operating the actuator to drive the valve pin, during the injection cycle, downstream beginning from the first selected position (51) to be moved to and held in a second closed position (52) for a second selected period of time; c) third controllably operating the actuator to drive the valve pin, during the injection cycle, upstream beginning from the second closed position (52) to be moved to and held in a second selected position (53) for a third selected period of time, the second selected position being an intermediate position or the full open position; and d) fourth controllably operating the actuator to drive the valve pin, during the injection cycle, downstream beginning from the second selected position (53) to be moved to a third closed position (54).

The present invention discloses an injection molding control method. The injection molding 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 method for controlling and/or monitoring a production plant for producing a multiplicity of articles, wherein the production plant has a machine tool; a machine tool part which interacts with the machine tool in order to produce an article; an RFID transponder connected to the machine tool part; two RFID reading devices which are arranged at a distance from one another and from the machine tool; and a control device which is connected to the RFID reading devices via data lines. The method includes determining a first location of the machine tool part at a first time with the first RFID reading device and/or with the second RFID reading device; and determining a second location of the machine tool part at a second time, which temporally follows the first time, with the first RFID reading device and/or with the second RFID reading device; and outputting at least one control signal with the control device on the basis of the first location and the second location.

An injection molding machine includes: a first driving device rotating a screw provided inside a heating cylinder; a second driving device moving the screw forward and backward; a metering control section configured to, by controlling the first driving device and the second driving device, to meter resin while melting the resin, and thereafter rotate the screw in reverse to thereby reduce the pressure of the resin; a first sensor unit for detecting the pressure; a second sensor unit for detecting one or more kinds of physical quantities that affect the change of the pressure; and a prediction section predicting decompressing rotation information based on the pressure detected by the first sensor unit and the one or more kinds of physical quantities detected by the second sensor unit. The metering control section controls the first driving device based on the decompressing rotation information predicted by the prediction section.

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.

Provided is an injection molding apparatus including a first mold and a second mold, an ejector plate provided on the first mold to reciprocate and configured to eject an injection molded object between the first mold and the second mold, and a sensor device having a moving sensor detachably attached to the ejector plate, and configured to detect a position of the ejector plate, wherein the sensor device is detachably attached to the first mold and the ejector plate by a magnetic force.