Injector for molding hardenable liquid precursors

Details Injector for molding hardenable liquid precursors Injector for molding hardenable liquid precursors

1981-12-10

1984-08-07

Rolla, Joseph J.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

417490, B67D 540

Patent

active

044638817

ABSTRACT:
An injector is provided for injecting hardenable liquid polymer precursors from an accumulator into a mold in a reaction injection molding process. A specially adapted plunger is employed to eject the liquid precursor from an accumulator barrel. The plunger provides a constant fluid-flow relationship between the liquid precursor inlet and the accumulator barrel during its full stroke. The plunger structure prevents the introduction of air and substantially empties the accumulator on each molding cycle.

REFERENCES:
patent: 3153385 (1964-10-01), Bowen, Jr.
patent: 3213903 (1965-10-01), Armstrong
patent: 4013391 (1977-03-01), Boden et al.
patent: 4187060 (1980-02-01), Ellis et al.

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