Low temperature process for evaporative pattern casting
AssigneeThe Board of Trustees of Western Michigan University
InventorJay Easwaran
Life of this patent
Estimating the term…
Abstract
A method is disclosed for the casting of metals by the use of a consumable or vaporizable pattern. In this method, a foamed pattern of a desired part is first formed. The pattern is then dipped into a ceramic slurry and the slurry dried in order to form a shell containing the foamed pattern. A bed of a particulate medium heated to a temperature of from 700.degree. to 1000.degree. F. is formed around the ceramic shell to cause the pattern to vaporize without burning and form a mold. A molten metal is then introduced into the mold, solidified and removed from the mold to form a casting. An inert atmosphere can be provided over the bed of heated particulate medium during the vaporization of the pattern to help suppress the burning of the vaporized pattern.
Claims13
A method of producing a cast metal part comprising the steps of forming a pattern of the metal part out of a heat-vaporizable material;
- forming a ceramic shell around said pattern;
- forming a bed of a particulate medium heated to a temperature of from 700.degree. to 1000.degree. F. around said ceramic shell;
- vaporizing the pattern to form a mold;
- introducing molten metal into said mold;
- solidifying said molten metal;
- and removing said solidified molten metal from said mold to form a cast metal part.
A method of producing a cast metal part comprising the steps of forming a pattern of the metal part out of a heat-vaporizable material;
- a ceramic shell around said pattern;
- forming a bed of a particulate medium heated to a temperature of from 700.degree. to 1000.degree. F. around said ceramic shell;
- vaporizing the pattern to form a mold;
- introducing a molten metal into said mold;
- replacing said heated particulate medium around said mold containing said molten metal with a particulate medium at a lower temperature than said heated particulate medium;
- solidifying said molten metal;
- and removing said solidified molten metal from said mold to form a cast metal part.
Dependencies are inferred from the claim text.