Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1983-11-02
1986-03-04
Godici, Nicholas P.
Metal founding
Process
Shaping liquid metal against a forming surface
164 661, 164 80, 1641221, 1641222, 164125, 1643381, B22D 2306, B22D 2704
Patent
active
045735166
ABSTRACT:
A ceramic mould is supported on a stainless steel platform carried at the upper end of a water-cooled tube surrounded by a copper cylinder containing alumina powder of approximately 100 .mu.m particle size which is fluidized by an inert gas. Metal in the mould is melted by a furnace which surrounds the mould and the mould is progressively withdrawn into the fluidized bed by which heat is extracted and transferred to water cooled coils surrounding the copper cylinder. In a modification, the inert gas is drawn from the fluidized bed by way of a filter and vacuum pump whereby the outlet pressure is reduced to about 1 torr. This reduces the risk of contamination of the alloy and permits re-use of expensive cooling gases.
REFERENCES:
patent: 3324932 (1967-06-01), Ayers
patent: 3770047 (1973-12-01), Kirkpatrick et al.
patent: 3810504 (1974-05-01), Piwonka
patent: 3844724 (1974-10-01), Sloan
patent: 3847203 (1974-11-01), Northwood
patent: 3942581 (1976-03-01), Sawyer
patent: 4190094 (1980-02-01), Giamei
patent: 4222429 (1980-09-01), Kemp
Northwood James E.
Quested Peter N.
Batten, Jr. J. Reed
Godici Nicholas P.
The Secretary of State for Defence in Her Britannic Majesty's Go
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