Plastic article or earthenware shaping or treating: apparatus – Means making particulate material directly from liquid or... – By means applying fluid jet or blast to unconfined liquid...
Patent
1994-02-14
1995-11-21
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Means making particulate material directly from liquid or...
By means applying fluid jet or blast to unconfined liquid...
75338, 264 12, B22F 908
Patent
active
054681332
ABSTRACT:
Apparatus for close coupled atomization of melts of metals having high melting points with low superheats is taught. The atomization apparatus includes means for supplying melt to be atomized at the relatively low superheat, melt guide means for guiding the melt as a stream to an atomization zone and a gas supply and means for delivering the gas as a stream to the atomization zone where both the melt supply and gas supply to the atomization zone are in very close proximity. The melt supply has an inwardly tapered lower end disposed immediately above the atomization zone. The gas supply surrounds the melt guide tube and the gas is delivered as a jet against the melt emerging from the melt guide tube. The temperature of the gas impacting the end of the melt guide tube is very low because of the gas expansion. The tendency for this gas to withdraw heat from the melt guide tube and cause a freeze-up is reduced by providing a shield for guiding the gas from the gas supply to the orifice where most of the gas expansion and cooling takes place. The gas shield contacts the melt supply tube at its lower end and conducts heat from the melt supply tube toward its upper end. The gas shield is kept very thin, and at least one groove is formed laterally in the gas shield to inhibit and reduce the flow of heat from the lower portion to the upper portion of the gas shield.
REFERENCES:
patent: 1859992 (1932-05-01), Seil
patent: 3387783 (1968-06-01), Schellenberg et al.
patent: 3817503 (1974-06-01), Lafferty et al.
patent: 3988084 (1976-10-01), Esposito et al.
patent: 4575325 (1986-03-01), Duerig et al.
patent: 4578022 (1986-03-01), Kenney
patent: 4619597 (1986-10-01), Miller
patent: 4619845 (1986-10-01), Ayers et al.
patent: 4631013 (1986-12-01), Miller
patent: 4778516 (1988-10-01), Raman
patent: 4801412 (1989-01-01), Miller
"Atomization of Specialty Alloy Powders," Alan Lawley, Journal of Metals, 1981, pp. 13-18.
Brun Milivoj K.
Miller Steven A.
Mourer David P.
General Electric Company
Leyson Joseph
Magee Jr. James
Payne R. Thomas
Woo Jay H.
LandOfFree
Gas shield for atomization with reduced heat flux does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas shield for atomization with reduced heat flux, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas shield for atomization with reduced heat flux will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1133030