Controlled fluid flow mold and molten metal casting method for improved surface
US7000676B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jun 29, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/049
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A DC casting mold for casting molten metal alloy comprising a cooled tubular body that has a thermally insulated insert attached to its top surface. The thermally insulated insert has a bottom portion with a beveled sidewall, which forms an angle with the horizontal melt surface layer of the molten metal and creates an eddy. The eddy causes a substantial number of oxides that are formed during the casting process to remain in the bottom sidewall portion of the thermally insulated insert of the mold, thereby substantially reducing the number of ingot surface imperfections that promote ingot cracking. In addition, the eddy promotes break-up of the oxides into smaller pieces as the oxides flow toward the cooled inner walls of the cooled tubular body, thereby having limited surface area for growth of oxide folds. A method of casting molten metal alloys with improved surface quality is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.