Method and apparatus for filling molds

Details Method and apparatus for filling molds Method and apparatus for filling molds

1976-05-21

1978-08-01

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Projecting particles in a moving gas stream

B29C 506

Patent

active

041043480

ABSTRACT:
The nonflowing molding materials are blown into the mold cavity which has a screen defining one surface of the article to be molded. The materials first fill up the remote areas of the cavity as the carrying air vents through the screen. As the cavity fills up to the feeding nozzle, a vent flap in the nozzle body opens up, allowing the carrying air to vent through the screened opening exposed by the flap until the mold is completely filled and the air is cut off.

REFERENCES:
patent: 2592521 (1952-04-01), Thompson
patent: 3099045 (1963-07-01), Honkanen
patent: 3140327 (1964-07-01), Dettmer
patent: 3164649 (1965-01-01), Poole et al.
patent: 3192561 (1965-07-01), Archer et al.
patent: 3283049 (1966-11-01), O'Donnell et al.
patent: 3341890 (1967-09-01), Oja
patent: 3431331 (1969-03-01), Pincus et al.

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