A mold clamping device includes a base, a stationary platen, a movable platen, a mold clamping mechanism, a tie bar, and a half nut. This mold clamping device further includes a shaft supporting plate supporting a tip of the tie bar. This shaft supporting plate is fixed to the tip of the tie bar, and is mounted on the base so as to be freely movable.

This injection molding method uses an injection molding machine for two-material molding, which comprises a first mold part that is provided with a cavity and a second mold part that is provided with a cavity and is arranged in tandem with the first mold part. This injection molding method comprises: a first molding step wherein a material is injected into the cavity of the first mold part and the material in the cavity is compressed; and a second molding step wherein a material is injected into the cavity of the second mold part. A pressure, which is generated in the second mold part by injecting the material into the cavity in the second molding step, acts on the first mold part, and a compressive force is applied to the material in the cavity in the first molding step.

This injection molding method uses an injection molding machine for two-material molding, which comprises a first mold part that is provided with a cavity and a second mold part that is provided with a cavity and is arranged in tandem with the first mold part. This injection molding method comprises: a first molding step wherein a material is injected into the cavity of the first mold part and the material in the cavity is compressed; and a second molding step wherein a material is injected into the cavity of the second mold part. A pressure, which is generated in the second mold part by injecting the material into the cavity in the second molding step, acts on the first mold part, and a compressive force is applied to the material in the cavity in the first molding step.

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.

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.

Provided is a magnetic clamp device that is capable of more finely measuring an induced voltage generated in a coil and selecting countermeasures against reductions in magnetization force. Multiple magnet blocks 11, 21 each comprising an invertible magnet 18, the polarity of which can be inverted, and non-invertible magnet 15, are positioned on a surface of a plate PL composed of magnetic body magnetically clamping a mold M1, M2 when in a magnetized state. The magnetic flux traversing the invertible magnet 18; and a control device 33 that determines whether or not there has been a polarity inversion in the induced voltage detected from the coil 31, and if there has been a polarity inversion, warns that the adhesion of the molds M1, M2 has decreased.

Provided is a magnetic clamp device that is capable of more finely measuring an induced voltage generated in a coil and selecting countermeasures against reductions in magnetization force. Multiple magnet blocks 11, 21 each comprising an invertible magnet 18, the polarity of which can be inverted, and non-invertible magnet 15, are positioned on a surface of a plate PL composed of magnetic body magnetically clamping a mold M1, M2 when in a magnetized state. The magnetic flux traversing the invertible magnet 18; and a control device 33 that determines whether or not there has been a polarity inversion in the induced voltage detected from the coil 31, and if there has been a polarity inversion, warns that the adhesion of the molds M1, M2 has decreased.

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.

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.

A clamp assembly for an injection molding machine includes a clamp piston slidable within a housing among a clamping position, a mold break position, and a meshing position disposed axially intermediate the clamping and the mold break positions. A clamp chamber urges the clamp piston towards the clamping position when pressurized, and a return device urges the clamp piston from the clamping position to the meshing position when pressure in the clamp chamber is relieved. At least one mold break actuator is coupled to a mold break engagement surface disposed within the housing. The mold break actuator is adjustable to accommodate retraction of mold break surface when the clamp piston moves to the clamping position, and to forcefully push the mold break surface forward against the clamp piston when moving the clamp piston to the mold break position.