Manufacture of foundry moulds and cores
US4069858A · kind A · utility
1Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Jan 24, 1978 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/03
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus for preparing sand-based foundry moulds and cores, particularly of the cold-setting type made from a sand/binder/catalyst mixture. After the introduction of the sand mixture into a mould or core box, sealing means is located over an open end of the box to enclose the mixture within the box, and suction is applied to the box. The sealing means may comprise a flexible diaphragm, which is drawn by the suction against the adjacent upper surface of the mixture to compact the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.