Method and apparatus for casting a metal article
US5072771A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Feb 9, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/045
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A long thin metal article having a thick portion is cast with a stress free interconnection between the thick and thin portions of the article. A heat transfer wall is provided around at least a portion of a mold in which the article is cast. To preheat the mold, heat is radiated from an inner side surface of a furnace wall to an outer side surface of the heat transfer wall. Heat is radiated from an inner side surface of the wall to the mold. Molten metal is conducted into the long thin portion of the article mold at a location other than along the length of the long thin portion of the article mold. During solidification of the molten metal, heat is radiated from the thick portion of the article mold to the inner side surface of the heat transfer wall. As the mold structure is withdrawn from the furnace chamber during solidification of the molten metal in the article mold cavity, heat is radiated from the outer side surface of the heat transfer wall to locations outside of the furnace. The presence of the heat transfer wall promotes a stress free solidification of the molten metal in the portion of the article where the thick and thin portions are interconnected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.