Injection molding machine

Details Injection molding machine Injection molding machine

1998-09-25

2000-05-30

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

92 2, 366 78, 425587, B29C 4550

Patent

active

060688106

ABSTRACT:
A plasticizing unit having a plasticizing screw, an injection piston connected to the screw, a quill connected to the piston, and hydraulic cavity formed by the piston and a quill end face. Hydraulic fluid is transferred to the hydraulic cavity to move the piston and screw away from the quill. The screw and piston are subsequently moved towards the quill to displace hydraulic fluid out of the hydraulic cavity and cause back pressure. The back pressure is counteracted by acting on the back of the quill.

REFERENCES:
patent: 3510915 (1970-05-01), Johansson
patent: 3810728 (1974-05-01), Jacobs
patent: 4005641 (1977-02-01), Nussbaumer
patent: 4824255 (1989-04-01), Wohlrab
patent: 5099749 (1992-03-01), Darish
patent: 5173312 (1992-12-01), Julinot
patent: 5540495 (1996-07-01), Pickel
patent: 5731005 (1998-03-01), Hehl

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