Metal founding – Process – Shaping a forming surface
Patent
1989-11-17
1991-02-05
Lin, Kuang Y.
Metal founding
Process
Shaping a forming surface
164361, B22C 102
Patent
active
049896679
ABSTRACT:
A shell mould comprising an inner layer of ceramic material which has a predetermined co-efficient of thermal expansion at a predetermined temperature and an outer ceramic layer of lower thermal co-efficient than the inner layer. The outer layer subjects the inner layer to compression on firing and during casting.
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"Introduction to Ceramics", by W. D. Kingery, pp. 472-473. John Wiley and Sons, Inc. 1960.
European Search Report No. EP 89 31 2042, dated 10/7/90.
Lin Kuang Y.
Rolls-Royce plc
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