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.

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.

A control device for an injection molding machine including a cylinder into which a resin is supplied and a screw that moves forward and rearward and rotates inside the cylinder, includes a metering control unit that performs metering of the resin inside the cylinder by controlling forward rotation and rearward movement of the screw until the screw has been moved rearward to a predetermined metering position, based on predetermined metering conditions, a rearward movement speed acquisition unit acquiring a rearward movement speed of the screw, a speed determination unit that determines a suck back speed for causing a resin pressure to reach a target pressure, based on the rearward movement speed acquired during metering by the rearward movement speed acquisition unit, and a suck back control unit causing the screw to move further rearward based on the suck back speed, after the screw has reached the predetermined metering position.

A control device for an injection molding machine including a cylinder into which a resin is supplied and a screw that moves forward and rearward and rotates inside the cylinder, includes a metering control unit that performs metering of the resin inside the cylinder by controlling forward rotation and rearward movement of the screw until the screw has been moved rearward to a predetermined metering position, based on predetermined metering conditions, a rearward movement speed acquisition unit acquiring a rearward movement speed of the screw, a speed determination unit that determines a suck back speed for causing a resin pressure to reach a target pressure, based on the rearward movement speed acquired during metering by the rearward movement speed acquisition unit, and a suck back control unit causing the screw to move further rearward based on the suck back speed, after the screw has reached the predetermined metering position.

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.

An injection molding apparatus (10) comprising: an actuator (940, 941, 942) comprised of a rotor (940r, 941r, 942r) having a drive axis (Y) and a driver (940dr, 941dr, 942dr) receiving electrical energy or power from an electrical drive (940d, 941d, 942d), the electrical drive (940d, 941d, 942d) comprising an interface that receives and controllably distributes electrical energy or power in controllably varied amounts to the driver (940dr, 941dr, 942dr), the actuator including a housing (940h, 941h, 942h) within, on or to which the electrical drive (940d, 941d, 942d) is mounted, the housing (940h, 941h, 942h) being mounted in proximity or disposition relative to the heated manifold (40) such that one or the other or both of the housing (940h, 941h, 942h) and the electrical drive (940d, 941d, 942d) are in substantial heat communication or contact with the heated manifold (40).

An injection molding apparatus (10) comprising: an actuator (940, 941, 942) comprised of a rotor (940r, 941r, 942r) having a drive axis (Y) and a driver (940dr, 941dr, 942dr) receiving electrical energy or power from an electrical drive (940d, 941d, 942d), the electrical drive (940d, 941d, 942d) comprising an interface that receives and controllably distributes electrical energy or power in controllably varied amounts to the driver (940dr, 941dr, 942dr), the actuator including a housing (940h, 941h, 942h) within, on or to which the electrical drive (940d, 941d, 942d) is mounted, the housing (940h, 941h, 942h) being mounted in proximity or disposition relative to the heated manifold (40) such that one or the other or both of the housing (940h, 941h, 942h) and the electrical drive (940d, 941d, 942d) are in substantial heat communication or contact with the heated manifold (40).

An automated in-mold label handling and product unloading device for use with a plastic material injection molding machine includes a label handling arm provided with a label holder at an outer end thereof, and a product unloading arm provided with a product gripper at an outer end thereof. The device has a stationary frame and a first linear guide device that supports the label handling arm so as to reciprocate along a y-axis direction. The device has a second linear guide device that supports the product unloading arm so as to reciprocate along a y-axis direction. The first and second linear guide devices are guided relative to the frame to be movable parallel to the x-axis. A label handling arm x-axis drive mechanism has a first drive motor mounted on the frame and a first transmission coupled to said first drive motor and to the first linear guide device.

An automated in-mold label handling and product unloading device for use with a plastic material injection molding machine includes a label handling arm provided with a label holder at an outer end thereof, and a product unloading arm provided with a product gripper at an outer end thereof. The device has a stationary frame and a first linear guide device that supports the label handling arm so as to reciprocate along a y-axis direction. The device has a second linear guide device that supports the product unloading arm so as to reciprocate along a y-axis direction. The first and second linear guide devices are guided relative to the frame to be movable parallel to the x-axis. A label handling arm x-axis drive mechanism has a first drive motor mounted on the frame and a first transmission coupled to said first drive motor and to the first linear guide device.

An injection unit includes an injection cylinder and a plasticizing screw in the injection cylinder. The plasticizing screw is rotatable about a longitudinal axis for plasticizing plastic raw material and is movable linearly along the longitudinal axis for injecting molten plastic raw material. The injection cylinder has an infeed and plasticizing zone for the plastic raw material with a circular-cylindrical inner wall with a constant diameter along the longitudinal axis, a metering zone in front of the infeed and plasticizing zone along the longitudinal axis in the injection direction with a circular-cylindrical inner wall with a constant diameter along the longitudinal axis, and a nozzle head in front of the metering zone in the injection direction with a nozzle-shaped inner wall. The diameter of the circular-cylindrical inner wall of the metering zone is smaller than the diameter of the circular-cylindrical inner wall of the infeed and plasticizing zone.