Shell-mold casting

Shell-mold casting

Shell-mold casting yields better surface quality and tolerances. The process is described as follows:

โ€“ The 2-piece pattern is made of metal (e.g. aluminum or steel), it is heated to between 175ยฐC-370ยฐC, and coated with a lubricant, e.g. silicone spray.

โ€“ Each heated half-pattern is covered with a mixture of sand and a thermoset resin/epoxy binder. The binder glues a layer of sand to the pattern, forming a shell. The process may be repeated to get a thicker shell.

โ€“ The assembly is baked to cure it.

โ€“ The patterns are removed, and the two half-shells joined together to form the mold; metal is poured into the mold.

โ€“ When the metal solidifies, the shell is broken to get the part.

Making the shell-mold
Making the shell-mold



Shell mold casting
Shell mold casting


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