Cincinnati Milacron Inc.

Ferromatik Milacron Maschinenbau Gmbh

Karl-Heinz Bourdon

Christoph Jaroschek

Herbert Thoma

A two-platen injection molding machine without tie bars has a platen fixed relative to the machine frame and a platen that moves relative to it, a traverse mechanism that operates the movable platen, a device for generating clamping force and a device to compensate for the deformation forces occurring during generation of the clamping force. The traverse mechanism and the device for generating clamping force are decoupled. Preferably, the device for generating clamping force has at least one connecting rod that passes through both the fixed and movable platens beneath the mold space. The connecting rod is detachably fastened to one of the platens and can be locked to the other platen by means of a clamping device that produces the clamping force. The device to compensate for the deformation forces includes at least one rigid spacer detachably fastened at one end to one platen, while the other end of the spacer is forced against the other platen.

Two-platen injection molding machine without tie bars

An electric drive with hydraulic assist is disclosed for use in an injection molding machine, especially for screw advance during the injection process and/or in the dwell pressure phase. An electric motor is primarily used to produce the axial advance of the injection screw via an appropriate gear train. A piston that is moveable in a cylinder through pressure provided by a hydraulic fluid reservoir, can be used to supplement the axial movement produced by the electric motor. It is proposed according to the invention that pressurization occurs via the hydraulic fluid reservoir upon reaching a defined control quantity which corresponds to a defined load condition on the electric motor, such that the pressure rise in the cylinder is proportional to the load on the electric motor.

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Reute, Germany

Karl-Heinz Bourdon