Nozzle shut-off valve for an injection molding machine

Details Nozzle shut-off valve for an injection molding machine Nozzle shut-off valve for an injection molding machine

1990-02-16

1991-07-30

Heitbrink, Timothy

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

251344, 251345, B29C 4523

Patent

active

050356054

ABSTRACT:
A nozzle shut-off valve for the plastication system of an injection molding machine. The valve includes a cylindrical body member that has axially spaced inlet and outlet passageways. Inclined passageways that extend from the inlet and outlet passageways to the outer surface of the body member to terminate in spaced openings on the periphery of the inner body member. A tubular outer member is provided with at least one recess or depression on its inner surface, the recess having a length sufficient to provide communication between a pair of the spaced peripheral openings in the inner body member when the recess is positioned in overlying relationship with the respective openings. Rotation or translation of the tubular outer member relative to the inner body member shifts the recess out of registration with the respective peripheral openings, to thereby prevent flow of material through the valve. Shifting of the outer member is accomplished by means of a pneumatic cylinder that is carried by the inner body member to shift the tubular outer member relative to the cylindrical body member.

REFERENCES:
patent: 1944739 (1934-01-01), Hunt
patent: 3106379 (1963-10-01), Sciuto et al.
patent: 3135293 (1964-06-01), Hulsey
patent: 3431600 (1969-03-01), Bullard et al.
patent: 3500501 (1970-03-01), Johansson
patent: 3809519 (1974-05-01), Garner
patent: 4037623 (1977-07-01), Beswick
patent: 4272236 (1981-06-01), Rees et al.
patent: 4850851 (1989-07-01), Dinerman

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