Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1973-08-20
1976-04-06
Lake, Roy
Metal founding
Process
Shaping liquid metal against a forming surface
295276, 164 9, 164 48, 164111, 204 9, 204 26, B22D 1908
Patent
active
039483096
ABSTRACT:
A method is disclosed for fabricating a rotor housing for a rotary internal combustion engine. A conductive mandrel is prepared having an outer surface complimentary to the resultant rotor housing inner wall, the mandrel is provided with an exterior surface smoothness in the range of 4-12 r.m.s. A functional coating of a composite particle wear-resistant material is electrolytically deposited onto the mandrel (acting as a cathode) to form an assembly, the exposed surface of the assembly is controlled to have a roughness characterized by projections no less than 0.030 inches and concentrated in a number no less than 5/cm.sup.2. The assembly is placed in a die-casting machine where a molten metallic medium is cast thereabout forming a casting which is substantially mechanically locked to the assembly. The mandrel is then stripped from the coating to leave the resultant rotor housing. The resultant rotor housing is characterized by wear-resistant inner surface which is almost totally non-porous, its as-deposited surface roughness is at least 24 r.m.s., has a high heat transfer coefficient, is non-brittle and experiences no micro-cracking due to heat checking in service. The composite is economically fabricated and is strongly adherent.
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"Bonding Cast Iron to Aluminum Castings," Light Metal Age, Oct., 1959, p. 17.
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Cordone Leonard G.
Telang Yeshwant P.
Bell Paul A.
Ford Motor Company
Lake Roy
Malleck Joseph W.
Zerschling Keith L.
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