Injection press for use in a transfer molding system

Details Injection press for use in a transfer molding system Injection press for use in a transfer molding system

1984-10-01

1986-09-16

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

2643284, 2643285, 425557, 425559, 425562, 425586, 425256, 425DIG228, B29C 4502

Patent

active

046119833

ABSTRACT:
Disclosed is an injection press for use in a transfer molding system for fiber reinforced thermo-setting resins, comprising an injection piston, an injection cylinder in which the injection piston moves, a feed bore which traverses the injection cylinder, a sprue orifice which leads into the mold, a telescoping sleeve which serves to seal off the feed bore when the piston travels toward the sprue orifice, wherein the injection piston seals the transfer bore at the end of the stroke near the sprue orifice, and wherein said feed bore is open when the piston is in a position a stroke length away from the sprue orifice.

REFERENCES:
patent: 3392217 (1968-07-01), Zitzloff
patent: 4372741 (1983-02-01), Cane et al.

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