Non-veining urethane resins for foundry sand casting
US8623959B2 · kind B2 · utility
2Cited by
57References
32Claims
0Family size
Inventors
Key dates
| Filing date | May 23, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Oct 27, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L97/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Described herein a method of manufacturing a metal shape that includes contacting a liquid metal and a surface of a foundry core under conditions wherein vein defects occur, the surface of the foundry core comprising a foundry aggregate, a combustible-organic material and a polyurethane resin, and the surface of the foundry core being free of or essentially free of an anti-veining agent; cooling the liquid metal to a temperature below its melting point thereby forming a metal shape; and then removing the foundry core from the metal shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.