Method and apparatus for the production of flaskless foundry molds
US4724888A · kind A · utility
2Cited by
3References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jan 29, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Jan 29, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C15/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method and apparatus for producing flaskless foundry molds made up of copes and drags of wet casting foundry sand, which is blasted into a cavity to form the mold with the use of vacuum. The sand is pressed mechanically while aspirating air therefrom. The gap coming into existence between the pressing plate and the back side of a mold during pneumatic impact compaction is filled with sand before pressing so that a flat back side is produced on the mold so that when casting takes place later there is not danger of the bottom of the mold fracturing or of deformation taking place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.