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US 5,460,854 AGranted
Impregnated ceramic core and method of making same
AssigneeCertech Incorporated
InventorEugene Krug
Life of this patent
Estimating the term…
Abstract
A method of strengthening a fired porous ceramic core for use in investment casting includes the steps of providing a fired porous ceramic core, impregnating the core with an aqueous solution of a water-soluble gum, resin, or sugar, such as polyvinyl alcohol, and drying the impregnated core to remove the water.
Claims12
A method of strengthening a fired porous ceramic core for use in investment casting, comprising the steps of:
- (A) providing a fired porous ceramic core consisting essentially of sintered ceramic particles;
- (B) impregnating the core with an aqueous solution of a water-soluble starch, gum, resin, sugar or combination thereof;
- and
- (C) drying the impregnated core to remove the water.
1 more element
A method of strengthening a fired porous ceramic core for use in investment casting, comprising the steps of:
- (A) providing a fired porous ceramic core consisting essentially of sintered ceramic particles;
- (B) impregnating the core with an aqueous solution of a water-soluble starch, gum, resin, sugar or combination thereof selected from the group consisting of alginates, alkyl and hydroxyalkycellulose, carboxymethylcellulose, carrageenan, guar gum, gum agar, gum arabic, gum ghatti, gum karaya, gum tragacanth, locust bean gum, pectins, polyacrylamide, poly(acrylic acid) and its homologs, polyethylene glycol, starch and starch modified to alter its molecular weight, tamarind gum, xanthan gum, and combinations thereof by soaking the core therein;
- and
- (C) drying the impregnated core to remove the water.
1 more element
Dependencies are inferred from the claim text.