Method and apparatus for pouring molten metal

Details Method and apparatus for pouring molten metal Method and apparatus for pouring molten metal

1980-03-28

1981-09-29

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164415, B22D 1110, B22D 2300

Patent

active

042917433

ABSTRACT:
A metal stream is protected from atmospheric contamination during casting by shrouding it with an inert gas from a gas source at the pour nozzle. The gas is supplied to a low turbulence zone at the nozzle which has a width at least one third of the length of the poured metal stream. The gas source may be an annulas surrounding the nozzle and having its inwardly and downwardly facing surfaces of perforated metal sheet and the outermost surfaces may be disposable in order to tolerate metal splashing. The need for a tube to enclose the protective gas is avoided.

REFERENCES:
patent: 1324458 (1919-12-01), McIntosh
patent: 3174200 (1965-03-01), Keel et al.
patent: 3451594 (1969-06-01), Stewart
patent: 3908734 (1975-09-01), Pollard
patent: 3921704 (1975-11-01), Tozaki
patent: 4102386 (1978-07-01), Hildebrant et al.
"Vergiessen Von Stahl unter Stickstoff als Schutzgas" by Holzhausen, et al., Neue Hutte, vol. 2, No. 11, Nov. 1957, pp. 685-691.
"A New System for the Control and Protection of Casting Stream" by Maddever, et al., AME-ISS Open Hearth Proc., vol. 59, 1976, pp. 177-211.

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