Lost foam casting apparatus for reducing porosity and inclusions in metal castings
US6619373B1 · kind B1 · utility
11Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/082
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Apparatus for the gravity-cast, bottom-fill, “lost foam” casting of metal castings, including a fugitive, pyrolizable pattern (for forming a casting cavity), and a hollow sprue (for conducting melt to the casting cavity) embedded in a bed of loose sand. The sprue is free from pyrolyzable foam and conducts melt from above the pattern to a gating system supplying melt to the pattern. The sprue is constructed so as to cause the melt to approach the gating system from beneath and keep any pyrolysis products from entering the sprue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.