Investment casting slurry composition and method of use
US7128129B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 2003 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Aug 4, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5436
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition and method for forming investment casting shells includes using colloidal silica, zircon flour, and fused silica in a slurry which is applied to a pattern. After the slurry is applied to the pattern, it is allowed to partially or completely solidify. After the shell has solidified, the pattern may be melted or otherwise removed. A molten material is introduced into the shell and allowed to cool to form an article. Finally, the shell is broken away or otherwise removed from the article. The improved shell slurry composition and corresponding method minimizes pattern-to-pour cycle times and is environmentally friendly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.