Method of making an insulated manifold with double cast walls

Details Method of making an insulated manifold with double cast walls Method of making an insulated manifold with double cast walls

1977-11-17

1981-01-06

Spruill, Robert Louis

Metal founding

Process

Shaping liquid metal against a forming surface

164 9, 164 34, 164 45, 164 94, 164 95, 164 98, 164112, 164135, B22D 1916, B22D 1900

Patent

active

042430933

ABSTRACT:
A composite article and method of forming the same wherein an inner casting is separated from an outer casting by an insulative portion defining the pattern for the outer surface of the inner casting and the pattern for the inner surface of the outer casting. The insulative portion is captured between the castings to define a thermal barrier therebetween. The castings are formed by gasifying an expendable gasifiable pattern corresponding to the inner and outer castings, respectively. The patterns are assembled with the insulative portion of the article disposed therebetween and a mold is formed about the assembled patterns and insulative portion. Upon pouring of molten casting metal into the mold, the expendable patterns are gasified into the mold, permitting the inner and outer portions of the article to be cast about the insulative portion to form the desired final composite article.

REFERENCES:
patent: Re28988 (1976-10-01), Schleitlin et al.
patent: 1423654 (1922-07-01), Engel, Sr.
patent: 2842820 (1958-07-01), Brennan
patent: 3157924 (1964-11-01), Smith
patent: 3426834 (1969-02-01), Jacobs et al.
patent: 3949552 (1976-04-01), Kaneko et al.
patent: 4077458 (1978-03-01), Hayashi et al.

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