Investment compound for use in precision casting mold

Details Investment compound for use in precision casting mold Investment compound for use in precision casting mold

1989-10-20

1990-08-14

Seidel, Richard K.

Metal founding

Process

Shaping a forming surface

164 35, B22C 100

Patent

active

049479261

ABSTRACT:
An investment compound for use in a precision casting mold comprises MgO powder and Al.sub.2 O.sub.3 powder as main constituents in such a manner that the MgO powder and/or the Al.sub.2 O.sub.3 powder are or is in the range of 100 .mu.m or less in grain size and of 10% or more in weight precent, whereby even when a high-temperature active casting material such as titanium is used, the material provides a casting having a very beautiful surface with no bubbles formed therein and can positively compensate for shrinkage due to the solidification of cast material in a lost-wax process and can advantageously provide the casting at lower prices.

REFERENCES:
patent: 4216815 (1980-08-01), Feagin
patent: 4316498 (1982-02-01), Horton
patent: 4553394 (1985-08-01), Watts
patent: 4557316 (1985-12-01), Takayanagi et al.
patent: 4602667 (1986-07-01), Moore et al.

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