Investment casting with exothermic material
US6446698B1 · kind B1 · utility
3Cited by
26References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2001 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Mar 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method and investment shell mold for casting comprising introducing molten metallic material into an investment shell mold to fill a mold cavity and provide an upper surface of the molten metallic material above the mold cavity. An initially closed, destructible region of the mold then is broken to provide an entry opening through which exothermic material is placed on the upper surface of the molten metallic material to provide a source of molten metallic material to accommodate shrinkage of a casting as it solidifies in the mold cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.