Method of and device for producing mold core
US4781236A · kind A · utility
2Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Jun 25, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C13/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a mold core from green sand, wherein green sand is blown into a mold cavity which is sized to be greater than the size of the mold core to be obtained, so that a preformed mold body is prepared. The preformed mold body is then compacted by a compacting die having a cavity recess which is sized in conformity with the size of the mold core to be obtained, until the preformed mold body size is reduced to the final stage. In consequence, the green sand is compacted to develop uniform distributions of strength and hardness over the entire portion of the mold core as the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.