Transfer molding method

Details Transfer molding method Transfer molding method

1974-08-21

1978-01-17

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

264313, 264328, B29G 300

Patent

active

040692906

ABSTRACT:
A method for molding elastomeric stock, the method comprising interposing an apertured, heat-resistant, flexible, insulation plate between a heated mold and the discharge portion of an elastomeric stock injection unit such that respective mold cavities provided in the mold are aligned with respective apertures in the insulation plate which intercommunicate the mold cavities with an internal discharge chamber in the injection unit. The mold and injection unit are moved relative to one another such that each presses against the other through the intermediary of the insulation plate, thereby permitting expulsion and transferring of a portion of elastomeric stock from the injection unit into the mold cavities to be cured, an excess portion of elastomeric stock remaining in the injection unit being prevented from undergoing curing by means of the presence of the insulation plate.

REFERENCES:
patent: 1740082 (1929-12-01), Foerstner
patent: 2300759 (1942-11-01), Amigo
patent: 3121918 (1964-02-01), Jurgeleit
patent: 3776998 (1973-12-01), Church

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