Preparation of foundry moulds and cores
US4129165A · kind A · utility
6Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1977 |
| Grant date | Dec 12, 1978 |
| Priority date | — |
| Expiry date | Nov 2, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C15/23
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
To compact a sand-binder mixture in a mould or core box and subsequently apply a hardening gas to the mixture, I apply to the open top of the box a fluid-pervious diaphragm backed by an impervious diaphragm, apply suction to the bottom of the box to draw the diaphragm against the top of the mixture and compact the mixture, and subsequently introduce the hardening gas between the diaphragms so that it passes through the first diaphragm and permeates the mixture within the box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.