Multi-wall core and process
US6626230B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2000 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/103
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method making a multi-wall ceramic core for use in casting airfoils, such as turbine blades and vanes, wherein a fugitive pattern is formed having multiple thin wall pattern elements providing internal wall-forming spaces of a final core, the pattern is placed in a core molding die cavity having a desired core configuration, a fluid ceramic material is introduced into the die cavity about the pattern and between the pattern elements to form a ceramic core, and the core is removed from the die cavity. The fugitive pattern is selectively removed from the core to provide a multi-wall green core. The green core then is fired to develop core strength for casting and used to form an investment casting mold for casting an airfoil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.