Injection molding machine

Details Injection molding machine Injection molding machine

1986-06-19

1987-12-29

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

264240, 264241, 264245, 264255, 2643288, 26432813, 264DIG57, 425462, 425573, 425DIG229, B29C 4516

Patent

active

047158026

ABSTRACT:
In a molding machine wherein in molding a molded article, the molded article is molded into a so-called sandwich shape in which the central portion of the molded article is molded with core layer resin and the outer surface of the core layer is wrapped with skin layer resin, a valve for changing over and injecting the resins from a first injection cylinder for injecting the core layer resin and a second injection cylinder for injecting the skin layer resin is substantially cylindrical, a cut-away portion for changing over and distributing the resins is formed in the central portion of the valve, and sandwich molding is accomplished with the opening-closing of the cut-away portion and each passageway being effected by rotation of the valve.

REFERENCES:
patent: 3339240 (1967-09-01), Corbett
patent: 3599290 (1971-08-01), Garner
patent: 3690797 (1972-09-01), Garner
patent: 3733156 (1973-05-01), Garner
patent: 3801684 (1974-04-01), Schrewe et al.
patent: 3809519 (1974-05-01), Garner
patent: 3873656 (1975-03-01), Garner
patent: 3979170 (1976-09-01), Monnet

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