Method of making a mold for metal casting
US5996682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Mar 9, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C7/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A mold for a prototype metal casting or the like may advantageously be made by forming a casting pattern of adhesively bonded aggregate particles using a binder containing a principle constituent that is soluble in supercritical carbon dioxide; forming a rigid shell mold about the pattern of materials that are unaffected by supercritical carbon dioxide; thereafter exposing the pattern and mold combination to supercritical carbon dioxide to remove the pattern binder adhesive and leave unbonded aggregate particles in the mold and removing the aggregate particles from the mold to leave a mold cavity that faithfully defines the pattern shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.