Fluid distributor and operational drive of a molding system, comprising: block forming manifold for distributing fluid, block including: first interface disposed on side of the block providing connection to stationary device; second interface disposed on block configured to provide connection to electric motor: cylinder bore formed in block, bore interconnected to fluid distribution circuit, cylinder bore open includes the first interface: shaft member being a translatable member, intermediate o...

A pressure measuring device for an injection molding machine having a plasticizing screw operated by a rotary drive and an injection drive includes a load detector having a deformation zone which forms part of a transmission member of the injection drive and is of reduced cross section, and a sensor. The deformation zone elastically deforms in response to a driving force acting on the transmission member, with the sensor measuring a change in shape of the deformation zone.

An injection unit in which an offset load is not applied to a ball screw for moving an injection screw. A pusher plate is provided that is moved while being guided by guide rods extending between front and rear plates, and is mounted with the injection screw and the ball screw so as to be rotatable but axially immovable. The ball screw is threadedly engaged with a nut mounted to the rear plate so as to be unrotatable and axially immovable. A support plate is coupled through coupling rods to the ...

Disclosed is a drive unit operable to translate and rotate a shaft, the drive unit including: (i) a hollow electric motor having a rotor, (ii) a fluid cylinder, (iii) means for connecting the shaft to the rotor of the hollow electric motor, (iv) means permitting the shaft to move lengthwise coupled with the fluid cylinder, and (iv) means connecting the fluid cylinder to the shaft, whereby the shaft may be rotated by the hollow electric motor and moved lengthwise by the fluid cylinder, and wherei...

A controller of an injection molding machine which compensates a delay in an injection velocity changeover and a delay at the time of changeover to the pressure-holding process, and is capable of more accurate and stable injection velocity control and changing control from the injection velocity control to pressure control. In the injection process, a motion command is outputted in every sampling period .tau. according to the command injection velocity. When a screw position overshoots the set v...

An injection molding machine that distinctively displays operation parameters attributed to molds, which are set by designating a mold to be used, and the other operation parameters, to thereby prevent setting errors. The machine has storage means for storing and saving the operation parameters attributed to molds, which are determined by molds, with respect to each mold, and storage means for operation parameters to be applied for operating the injection molding machine. In the storage means fo...

A drive assembly for rotating and translating a shaft comprising a hollow shaft motor and a fluid cylinder. The hollow shaft motor rotates the shaft and the fluid cylinder moves the shaft lengthwise. The drive is particularly useful in the injection unit of an injection-molding machine. In one preferred embodiment the injection unit includes a hollow electric motor and a hydraulic cylinder. A first cylinder wall of the hydraulic cylinder is joined to a rotor of the hollow motor. A second cylinde...

A digital-to-analog converter using capacitors and an operational amplifier, which can be highly integrated due to its small area and which can rapidly perform a stable converting operation. The digital-to-analog converter includes a data input unit, a first conversion unit, a second conversion unit, and a signal output unit. When digital data is input to the data input unit, the data input unit is connected to the first conversion unit or the second conversion unit. The first conversion unit ch...

An electromotive adjustment drive includes an electric drive having a single motor with a rotor having a magnetic pole assembly, and a stator interacting with the rotor and having a magnetic pole assembly. The rotor is operatively connected to a member, such as a plasticizing screw of an injection unit, and is constructed for movement along a travel path, whereby one of the magnetic pole assemblies of the rotor and the stator is extended in relation to the other one of the magnetic pole assembli...

A servo motor control apparatus comprises a motion control unit for generating a position command; a first drive amplifier connecting with the motion control unit, for receiving the command to drive a first servo motor, and forming a first position control loop together with the motion control unit and the first servo motor; and at least one second drive amplifier connecting with the motion control unit, for receiving the command to drive at least one second servo motor, and forming a second pos...