Lost-foam casting of aluminum under pressure
US5014764A · kind A · utility
9Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Nov 16, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/046
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An organic foam pattern of the article to be cast is immersed in a dry sand mold containing no binder, the mold is filled with molten aluminum or aluminum alloy which replaces the foam and gradually solidifies, and an increasing isostatic gas pressure is simultaneously applied to the mold and to the aluminum or aluminum alloy after filling of the mold is complete. The isostatic gas pressure rises to a maximum value higher than 1.5 MPa and up to 10 MPa, and results in cast articles having improved mechanical characteristics and, in particular, better resistance to fatigue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.