Process and materials for making refractory cores
US4284121A · kind A · utility
16Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/167
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Ceramic cores suitable for use in investment casting operations are molded from a mixture containing comminuted refractory which includes partially dehydrated gypsum and a sublimable binder. When the sublimable binder has been sublimated from the molded core, it is soaked in water in order to hydrate the gypsum and cause it to set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.