Two-stage heat treating decoring and sand reclamation system
US5901775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Jun 23, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C5/085
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In order to effectively heat treat and decore a metal casting, and thereafter fully reclaim the core sand for reuse, a two-stage system processes metal castings and core sand formed of sand and binder. The two-stage system includes a first stage for removing the core sand from the metal casting while at the same time heat treating the metal casting, and it also includes a separate, second stage for reclaiming the core sand. For this purpose, fluidized and heated sand is utilized as the castings and sand are conveyed together in the first stage and the sand alone is conveyed in the second stage for recirculation of at least a portion of the sand to the first stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.