Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With accumulator – trap chamber – or serially arranged valves...
Patent
1992-02-14
1995-01-10
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With accumulator, trap chamber, or serially arranged valves...
425559, 425561, 425563, B29C 4502
Patent
active
053801865
ABSTRACT:
A flow regulating assembly for restricting plastic material from flowing directly from a central chamber of an injection piston to an accumulator cavity of a plastic injection machine and instead directing the plastic material towards the wall of the accumulator cavity thereby providing a scouring effect and reducing build-up of the plastic material on the wall of the accumulator cavity. The flow regulating assembly includes a valve member having a central opening located proximate to and in corresponding alignment with the central chamber of the injection piston and four branch passageways extended from the central opening of the valve member to external openings in a circumferential groove in an outer edge of the valve member, the outer edge of the valve member which is concentric with and proximate to the wall of the accumulator cavity. Four channels are located on a conical-shaped head portion of the valve member proximate to the circumferential groove.
REFERENCES:
patent: 4557683 (1985-12-01), Meeker et al.
patent: 4643665 (1987-02-01), Zeiger
A. R. Morse, What Injection Molders Should Know About Reciprocating Screw-Tip Shutoffs, Aug. 1967.
Hettinga Siebolt
Ober James K.
Heitbrink Tim
Herink Kent A.
Laurenzo Brian J.
Trout Brett J.
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