Adjustable injection molding backflow preventer

Details Adjustable injection molding backflow preventer Adjustable injection molding backflow preventer

1983-01-19

1985-04-23

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

425562, 425563, 26432812, B29F 302

Patent

active

045127336

ABSTRACT:
A backflow preventer on the end of a plastifying screw for an injection molding apparatus has a housing provided with radial bores which are axially and angularly offset. A pin accessible from the exterior of the housing passes through a radial hole but traversing in a valve member with clearance to permit the stroke of the valve member to be adjusted by selective insertion of the pin in the bores.

REFERENCES:
patent: Re30335 (1980-07-01), Johansson
patent: 3438393 (1969-04-01), Godley
patent: 3926219 (1975-12-01), Ersfeld et al.
patent: 4349044 (1982-09-01), Schirmer
patent: 4358033 (1982-11-01), Dykehouse
patent: 4377180 (1983-03-01), Biljes

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