Foundry sand with oxidation promoter
US6920911B2 · kind B2 · utility
1Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Nov 7, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/123
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Sand mold for shaping molten metal cast into the mold. The mold includes sand, a thermally oxidizable polymer amongst the grains of the sand, and a catalyst coating on the gains for promoting the thermal oxidation and breakdown of the polymer in the course of removing the sand from the casting and/or reclaiming the sand for reuse. The catalyst coating adheres so tenaciously to the grains of sand that the sand can withstand repeated casting and sand reclamation cycles without the need to replenish the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.