Method of casting a metal article
US4809764A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Mar 28, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/045
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A long, thin article or portion of an article of an equiaxed metal is cast without providing gates along the length of a portion of a mold cavity in which the long thin portion of the article is cast. Prior to casting the article, the lower half of the long thin portion of the article mold is heated into a temperature range in which the highest temperature is close to but less than the solidus temperature of the metal of the article. Molten metal is conducted into the long thin portion of the article mold cavity at a location other than along the length of the long thin portion of the article mold cavity. During solidification of the molten metal, molten metal is simultaneously solidified along surface areas in the lower half of the long thin portion of the mold cavity and along surface areas in the upper half of the long thin portion of the mold cavity. The solidificaton of the molten metal in the lower half of the long thin portion of the mold cavity is completed prior to completion of solidification of the molten metal in the upper half of the long thin portion of the mold cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.