Process of forming multi piece vaporizable pattern for foundry castings
US4240492A · kind A · utility
17Cited by
17References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1978 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Oct 23, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C7/023
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A casting process is disclosed including the steps of fabricating a multi-piece pattern from cellular plastic material, assembling the pieces to form a pattern, coating the pattern with a magnesium silicate ceramic coating and imbedding the pattern in dry, loose sand within a box or flask. The box includes a plurality of perforated side walls and a sprue is connected to the pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.