Chemically bondable foundry sand
US4440864A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Mar 19, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A chemically bondable foundry sand comprising a mixture of sand, binder and a plurality of fibres intimately mixed and dispersed throughout the mixture. Cores and moulds made from such sand have improved fracture resistance. The mixture may comprise from 0.01 to 1.0 wt. % of fibres, the length/diameter ratio of each fibre may be at least 10 and the fibres may have a length of from 1 to 20 mm. The fibres may be glass fibres, organic fibres or natural fibres. The binder may comprise a silicate binder or an organic binder such as a phenolic binder or a furane binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.