Lost-foam casting apparatus for improved recycling of sprue-metal
US6845810B2 · kind B2 · utility
4Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2002 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Oct 11, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/082
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Apparatus for the gravity-cast, “lost-foam” casting of metal castings, including a fugitive, pyrolizable foam pattern forming a casting cavity in a bed of loose sand, and a hollow sprue for supplying melt to the casting cavity, wherein the sprue consists essentially of the same metal as is being cast. A high-temperature, porous vent is provided adjacent the discharge end of the metal sprue to expel air from the sprue that would otherwise be trapped therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.