Methods and apparatus for injection molding and injection blow m

Details Methods and apparatus for injection molding and injection blow m Methods and apparatus for injection molding and injection blow m

1989-08-16

1990-05-15

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Combining of separately supplied fluids

And valving means controlling flow for combining

239415, 2394173, 2394175, 239583, 1376254, 137897, B05B 712

Patent

active

049251007

ABSTRACT:
Valve means for use in a co-injection nozzle of a multi-polymer injection molding or blow-molding machine wherein the nozzle has an axial or cylindrical central channel, comprised of an elongated sleeve having an axial central passageway and a port in its side wall and axially-reciprocable within the nozzle central channel, and, either a solid pin within and fixed relative to the sleeve, or, more preferably, an elongated pin axially-reciprocable within the sleeve central passageway, the sleeves and pins each mounted in close tolerance slip fits to prevent any significant accumulation or passage of polymer melt material.

REFERENCES:
patent: 368266 (1887-08-01), Wright
patent: 2910248 (1959-10-01), Keuter
patent: 3661679 (1972-05-01), Law
patent: 3947175 (1976-03-01), Melcher
patent: 3976226 (1976-08-01), Monnet
patent: 4093121 (1978-06-01), Strom
patent: 4117955 (1978-10-01), Sokolow
patent: 4635852 (1987-01-01), Muhlnickel

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