Investment Casting Refractory Material
AssigneeWiSys Technology Foundation, Inc.
InventorsDaniel Scott McGuire, Eric Ernst Hellstrom
Life of this patent
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Abstract
An investment casting method involves producing a casting shell by applying a hardenable refractory material to a sacrificial pattern. The casting shell having a plurality of phosphate bonds in the hardenable refractory material, which provide increased structural integrity during casting and improved frangibility during shell removal. The casting shell may also have a plurality of gaseous pockets suspended in the refractory material, which do not degrade the structural integrity during casting and provide improved frangibility during shell removal.
Claims24
An investment casting method for creating an article from a sacrificial pattern, the method comprising:
- applying a liquid refractory material to an outer surface of an investment casting pattern;
- curing the liquid refractory material onto the outer surface of the pattern to from a shell, the curing process generating a plurality of phosphate bonds;
- replacing the pattern with a molten material;
- and
- allowing the molten material to solidify in the shell to produce the article.
An investment casting shell for the casting of high-temperature molten materials comprising:
- a hardened refractory material formed around an outer surface of an investment casting wax pattern to from a shell, the hardened refractory material deriving strength from a plurality of phosphate bonds.
An investment casting refractory material for the casting of high-temperature molten materials comprising:
- a liquid refractory material containing dibasic ammonium phosphate and monobasic magnesium phosphate, and configured to be received on an outer surface of an investment casting wax pattern.
Dependencies are inferred from the claim text.