Process for regulating hardening speed of self-hardening mold
US3960798A · kind A · utility
4Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1974 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Aug 26, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for regulating the hardening speed of a self-hardening mold which comprises adding an alcohol as a hardening speed regulating agent when a mold is formed with molding sand prepared by adding a polyvinyl alcohol solution and a boron compound to refractory particles and then kneading the mixture. As the hardening speed regulating agent, polyhydric alcohol such as ethylene glycol, mannitol, sorbitol, glycerol, etc., and monohydric alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, etc., may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.