Method of supplying a moldable mixture of materials to an articl

Details Method of supplying a moldable mixture of materials to an articl Method of supplying a moldable mixture of materials to an articl

1985-10-25

1988-03-01

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 406, 2643289, 425144, 425586, B29C 4574, B29C 4578

Patent

active

047284765

ABSTRACT:
A method of supplying material to an article forming mold of an injection molding machine. The method comprises initially mixing a granular thermoplastic resin with a granular filler in a dry state and then heating the dry mixture in the chamber in which the feed screw of an injection molding machine rotates. The heating is controlled to initially convert the dry resin to a molten mass while simultaneously heating the filler with the filler remaining as a heated solid. After such initial heating the molten resin/heated filler is retained at a lower temperature prior to molding and then is further heated for ejection from the chamber.

REFERENCES:
patent: 2309729 (1943-02-01), Gordon
patent: 3728053 (1973-04-01), Stillhard et al.
patent: 3732345 (1973-05-01), Amos et al.
patent: 3959433 (1976-05-01), Sauers
patent: 4165302 (1979-08-01), Armenti et al.
patent: 4311446 (1982-01-01), Hold et al.

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