Two-stage electric injection unit with rotating plunger

Details Two-stage electric injection unit with rotating plunger Two-stage electric injection unit with rotating plunger

1998-02-17

2000-07-11

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

425557, 425558, 425560, B29C 4570

Patent

active

060863536

ABSTRACT:
The invention is directed to a two-stage, all-electric injection unit. More specifically, an injection unit in which the feed screw is preferably used only for plastication and the injection of the plasticized material is accomplished by a separate accumulator having an electrically driven linear actuator, such as a ball screw mechanism. The plunger of the accumulator is configured with a helical flight and is rotatable by way of a one-way clutch interposed between the plunger and the ball screw.

REFERENCES:
patent: 3861841 (1975-01-01), Hanning
patent: 4290701 (1981-09-01), Schad
patent: 4722679 (1988-02-01), Farrell
patent: 4734243 (1988-03-01), Kohama et al.
patent: 4758391 (1988-07-01), Shimizu et al.
patent: 5281384 (1994-01-01), Banks
patent: 5454995 (1995-10-01), Rusconi et al.
patent: 5606707 (1997-02-01), Ibar
patent: 5863567 (1999-01-01), Klaus

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