Method for making foundry moulds and cores utilizing a gas catalyst
US3938578A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Feb 13, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/162
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Foundry moulds or cores are made by putting a mixture of foundry sand and acid-hardenable binder into a mould or core box, hardening the binder by passing an acidic gas through the mixture, removing the mould or core from the box and applying to its surface a material which will neutralise or adsorb acidic gases. The neutralising or adsorbent material permits avoidance of the health hazard of emission of acidic gas from the mould or core on storage or during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.