Process of producing molded body from green molding sand

Details Process of producing molded body from green molding sand Process of producing molded body from green molding sand

1990-06-18

1992-08-11

Batten, Jr., J. Reed

Metal founding

Process

Shaping a forming surface

164 37, 164 38, 1641601, 164186, 164195, B22C 1528

Patent

active

051370913

ABSTRACT:
Green sand is packed as molding sand into a compression mold and the green sand is precompacted in the mold using a hydraulic press and thereafter is finally compacted after the precompaction wherein prior to precompaction recesses formed in the molding tools are subjected to a vacuum for drawing the molding sand into the recesses. In this way, even complicated mold cores can be produced satisfactorily and efficiently from green sand.

REFERENCES:
patent: 3293703 (1966-12-01), Taccone
patent: 4063586 (1977-12-01), Keller
patent: 4415015 (1983-11-01), Zadera
patent: 4620584 (1986-11-01), Witt
patent: 4781236 (1988-11-01), Uzaki et al.
patent: 4791974 (1988-12-01), Larsen

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