Plastic injection molding machine with rotary and linear drives

Details Plastic injection molding machine with rotary and linear drives Plastic injection molding machine with rotary and linear drives

1996-05-03

1998-02-03

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Feed control of material en route to shaping area

425149, B29C 4582

Patent

active

057141762

ABSTRACT:
A plastics injection molding machine having a screw which is arranged in an injection cylinder and is moved by a linear drive and a rotary drive such that it is driven by only one motor. The driving motor is a servo motor and the linear drive is a piston-cylinder unit which is moved by a hydraulic pump which is connected with the driving motor and is in a closed hydraulic circuit. The screw has a drive shaft which is acted upon by the rotary drive connected to the driving motor. The rotary drive has a hydraulic drive with a motor which has a driven motor shaft corresponding to a piston rod. The motor is connected with the forward-flow line via a feed line and an outlet line. A releasable check valve, which is controllable by a two-way directional control valve, is provided in the forward-flow line.

REFERENCES:
patent: 4592712 (1986-06-01), Gutjahr
patent: 4753588 (1988-06-01), Kiya
patent: 4855095 (1989-08-01), Sato

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