Patent · US Expired

Investment casting slurry composition and method of use

US7278465B1 · kind B1 · utility

4Cited by
12References
15Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 1, 2006
Grant dateOct 9, 2007
Priority date—
Expiry dateApr 1, 2026

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB22C9/04
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

An investment casting method involves producing a casting shell by applying a hardenable moist mixture to a sacrificial pattern. To hasten the hardening of the moist mixture to create the shell, a stucco coat is subsequently applied to the mixture. In some cases, the stucco coat comprises a drier mixture of the elements used in the moist mixture. The drier mixture preferably includes a material that alters the alkalinity of the underlying moist mixture. In some cases, the stucco coat also includes an amorphous mineral silicate. Once the shell is created, a molten metal is introduced into the shell to replace the sacrificial pattern, thereby producing a metal cast item.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.