Screw driving method for injection molding machine

Details Screw driving method for injection molding machine Screw driving method for injection molding machine

1994-05-02

1995-12-12

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

2643288, 26432813, 425145, 425587, B29C 4582, B29C 4550

Patent

active

054747333

ABSTRACT:
A screw driving mechanism E which uses a hydraulic cylinder (main cylinder) 2 arranged on the same axis with respect to a screw 3 so as to allow the screw 3 to perform frontward and rearward driving. A pair of auxiliary cylinders 4 and 5 are arranged in parallel at both sides of the main cylinder 2, and the forward ends of piston portions 4p and 5p of the auxiliary cylinders 4 and 5 are joined to the forward end of a piston portion 2p of the main cylinder 2 via a joint mechanism 6. This makes it possible to select a plurality of different injection pressures.

REFERENCES:
patent: 3080610 (1963-03-01), Baigent
patent: 3259943 (1966-07-01), Kovach et al.
patent: 3806294 (1974-04-01), Hehl
patent: 4579515 (1986-04-01), Kawaguchi et al.
patent: 4712991 (1987-12-01), Hehl
patent: 4879077 (1989-11-01), Shimizu et al.
patent: 5002717 (1991-03-01), Taniguchi
patent: 5221509 (1993-06-01), Fujimoto et al.

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