Apparatus for molding at low pressure
US3980125A · kind A · utility
4Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | May 7, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D18/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process and an apparatus for molding metals, alloys and plastics material under low pressure. A gas which is inert with respect to the material to be molded is injected at a controlled rate and in a controlled volume into the compression/expansion chamber of the apparatus during certain phases of the molding operation, while compressed air is used for establishing pressure in the chamber or furnace accommodating the crucible which contains the liquid material to be molded. By virtue of the invention, it is possible to avoid oxidation phenomena and to improve the quality of the moldings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.