Pressless injection molding

Details Pressless injection molding Pressless injection molding

1975-12-31

1977-03-29

Kucia, Richard R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264329, B29F 106

Patent

active

040149749

ABSTRACT:
A method of injection molding wherein a pair of separable mold plates are initially urged together and fluid plastic is injected into a mold cavity formed between the mold plates to form an article. The injection pressure of the fluid plastic is utilized to generate forces sufficient to overcome the internal forces urging the mold plates apart and thus hold the mold plates together until the material being molded solidifies either by cooling, chemical reaction or phase change.

REFERENCES:
patent: 2698460 (1955-01-01), Amo
patent: 3346924 (1967-10-01), Lombard
patent: 3417433 (1968-12-01), Teraoka
patent: 3520026 (1970-07-01), Stidham
patent: 3685937 (1972-08-01), Engel
patent: 3776998 (1973-12-01), Church

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