Plastic article or earthenware shaping or treating: apparatus – With control means responsive to independently operated timer – For timing mold filling means
Patent
1979-04-02
1981-07-21
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
With control means responsive to independently operated timer
For timing mold filling means
2643288, 425160, 425166, 425549, 425566, 425570, B29F 103, B29F 105
Patent
active
042795826
ABSTRACT:
A method and apparatus for multiple cavity injection molding which permits individual variation of gate opening time for mold shut-off bushings. The gate pins for the shut-off bushings are controlled by individual double-acting fluid motor, the bushings being fed by a common manifold. Gate opening is thus not dependent upon attainment of a predetermined injection pressure. Closure of the gate for each cavity will permit material to be fed faster to the other cavities. Novel means is provided for securing each gate pin to its actuating cylinder, which minimizes heat transfer to the motor, accommodates expansion of the material manifold and permits gate opening adjustment. The fluid motors are end-mounted on an actuating fluid manifold, allowing close juxtaposition. A cycle counter may be used to control inventory.
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Incoe Corporation
Pavelko Thomas P.
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