Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1983-08-25
1986-02-11
Godici, Nicholas P.
Metal founding
Process
Shaping liquid metal against a forming surface
164132, B22D 2900
Patent
active
045693846
ABSTRACT:
Ceramic core materials are selectively dissolved from light metal, e.g. Aluminium or light alloy, e.g. Aluminium alloy castings which are themselves susceptible to attack by caustic alkali solutions, by providing the core material with a substance containing Hydrogen donor group which is capable of producing nascent hydrogen and contacting the core with fused anhydrous caustic alkalis. By this means Silica cores can be removed from Aluminium alloy castings, or a ceramic containing a hydrogen donor group can be selectively dissolved from one that does not, e.g. a Silica disposable pattern from within an Alumina mould containing an integral Alumina core.
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Godici Nicholas P.
Reid G. M.
Rolls-Royce Limited
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