Apparatus for cold runner transfer molding

Details Apparatus for cold runner transfer molding Apparatus for cold runner transfer molding

1986-10-15

1987-12-15

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Molding of thermosetting or cross-linking stock

26427211, 425548, 425564, 425572, B29C 4572

Patent

active

047129948

ABSTRACT:
A method and apparatus for cold runner transfer molding. Insulating and/or cooling means are provided so that the mold runnerblock is kept sufficiently cool to prevent curing of the plastic molding compound therein. By the addition of a plunger near the gate of the mold, a quasi-continuous molding operation may be effected. Local preheating of the molding material at the gate locale may be used to liquefy a feedstock which has travelled through the cold-runners in powdered form.

REFERENCES:
patent: 2300759 (1942-11-01), Amigo
patent: 2770011 (1956-11-01), Kelly
patent: 3819312 (1974-06-01), Arpajian
patent: 3836307 (1974-09-01), Taylor
patent: 3859024 (1975-01-01), Pasch et al.
patent: 4017242 (1977-04-01), Mercer
patent: 4260359 (1981-04-01), Dannels et al.
patent: 4340353 (1982-07-01), Mayer
patent: 4436496 (1984-03-01), Laghi

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