Investment casting with improved filling
US5592984A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Feb 23, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/13
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making a directionally solidified casting by casting a melt in a mold cavity of an investment mold having a core therein to form an internal casting surface feature involves evacuting the mold cavity while the investment mold is disposed on a chill member with the mold cavity communicating to the chill member, and introducing the melt into the evacuted mold cavity about the core so that the melt contacts the chill member for unidirectional heat removal and directional solidification. Then, gaseous pressure is applied to the melt cast in the mold cavity rapidly enough after introduction in the mold cavity to reduce localized void regions present in the cast melt as a result of surface tension effects between the melt and the core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.