Method of and apparatus for molding a receptacle

Details Method of and apparatus for molding a receptacle Method of and apparatus for molding a receptacle

1976-11-26

1978-07-11

Husar, Francis S.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249139, 249144, 249150, 264318, 264334, B29C 112, B29C 116, B28B 730, B22C 924

Patent

active

041002490

ABSTRACT:
A pair of like mold parts are juxtaposed to form a mold cavity having a relatively large maximum cross-sectional size and an opening of relatively small cross-sectional size. A core is positioned in this cavity and has a body of cross-sectional size greater than that of the mold-cavity opening and having a neck extending out of the cavity through the opening and blocking this opening. A mass of hardenable material is introduced into the cavity around the core and is hardened. Thereafter the core is elastically deformed and withdrawn from inside the hardened mass whereupon the mold parts are displaced apart to demold the hardened mass.

REFERENCES:
patent: 720718 (1903-02-01), Maddock
patent: 1698836 (1929-01-01), Bartley
patent: 2392561 (1946-01-01), Weber
patent: 3120028 (1964-02-01), Streeter
patent: 3136831 (1964-06-01), Zinn
patent: 3345438 (1967-10-01), Carey
patent: 3345438 (1967-10-01), Carey
patent: 3355772 (1967-12-01), Kolberg
patent: 3622117 (1971-11-01), Lerman
patent: 3815863 (1974-06-01), Andeweg

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