Method and apparatus for countergravity casting molten metal

Details Method and apparatus for countergravity casting molten metal Method and apparatus for countergravity casting molten metal

1992-06-11

1993-04-27

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

164 661, 164 681, 164133, 164134, 1641471, 164259, 164337, B22D 2104, B22D 3504, B22D 1804

Patent

active

052053466

ABSTRACT:
A countergravity casting apparatus (10) includes a mold (12) supported above a furnace (14) containing a supply of molten metal to be cast into the mold (12). An electromagnetic pump (66) is accommodated in a casting chamber (46) of the furnace (14) and pumps the metal against gravity from the furnace (14) into the mold (12). The casting chamber (46) is enclosed by an insulating cover (40) and defines an air space over the metal in the chamber (46). A lance (64) extends through the cover (40) and delivers inert gas into the air space and purges it of outside atmospheric gases that would otherwise contaminate the metal in the chamber (46).

REFERENCES:
patent: 3430685 (1969-03-01), Drugowitsch
patent: 3654150 (1972-04-01), Eccles
patent: 4585050 (1986-04-01), Merrien et al.
patent: 4714102 (1987-12-01), Koya
patent: 4741381 (1988-05-01), Nishida et al.
patent: 4860820 (1989-08-01), Pereira
patent: 4967827 (1990-11-01), Campbell
patent: 5022458 (1991-06-01), Smith

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