Metal founding – Means providing inert or reducing atmosphere – In continuous casting apparatus
Patent
1988-08-31
1991-12-17
Seidel, Richard K.
Metal founding
Means providing inert or reducing atmosphere
In continuous casting apparatus
164437, 222603, B22D 1100
Patent
active
050727796
ABSTRACT:
Casting method for a continuous casting machine of a reduced height with a horizontal or almost horizontal oscillatory crystallizer, whereby an immersed teeming nozzle teems molten metal into the crystallizer below the meniscus, regulation of the flow being obtained with regulation means. Pressure is kept within a tube portion of the teeming nozzle at least transiently which is related to the pressure surrounding the teeming nozzle itself and with the pressure acting on the meniscus of the molten metal in the crystallizer, the pressure within the tube portion of the teeming nozzle being such as will at least hinder the migration of gas from the exterior of the nozzle to the inside of the bore of the tube portion. An immersed teeming nozzle for a continuous casting machine of a reduce height is also disclosed. The teeming nozzle teems the metal below the meniscus of molten metal in an oscillatory crystallizer. A device to regulate the flow of the molten metal is included, the nozzle being suitable to perform the above method and comprising means at least to hinder a migration of gas from the exterior to the inside of the nozzle.
REFERENCES:
patent: 2379401 (1945-06-01), Poulter
patent: 2734241 (1956-02-01), Southern
patent: 4749025 (1988-06-01), Nonini
Patent Abstracts of Japan, vol. 10, No. 234 (M-507) [2290], Aug. 14th, 1986; & JP-A-61 67 548 (Harima Refract. Co. Ltd.) Jul. 4, 1986.
Soviet Inventions Illustrated, Week 8650, Dec. 24th, 1986, No. 86-330452/50, Derwent Publications Ltd., London, Great Britain; & SU-A-1 097 439 (Bardin Ferr. Metallurgy), 15-06-1984.
Bassarutti Alfredo
Tosini Riccardo
Danieli & C. Officine Meccaniche SpA
Seidel Richard K.
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