Injection molding machine

Details Injection molding machine Injection molding machine

1986-06-13

1988-02-02

Hart, Charles

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, 425547, 425560, 425559, 425561, B29C 4577

Patent

active

047226790

ABSTRACT:
The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.

REFERENCES:
patent: Re28721 (1976-02-01), Farrell
patent: 3940223 (1976-02-01), Farrell
patent: 4070142 (1978-01-01), Farrell
patent: 4389358 (1983-06-01), Hendry

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