Method of manufacturing hollow billet and apparatus therefor
US4875519A · kind A · utility
6Cited by
0References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/006
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus utilizing a core is located at a central portion of a molten metal storing portion in a vertical semi-continuous mold. The molten metal is poured into the molten metal storing portion, and casting takes place with the inner diameter of a solidified distal portion of the molten metal being controlled by a distal portion of the core. This approach provides a reliable method for the manufacture of high-quality hollow billets which are free from internal defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.