Mold surface treatment process and mold
US4934440A · kind A · utility
4Cited by
2References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 1, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Sep 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C19/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A mold surface treatment process comprises: providing a fluidized bed of a treating powder; holding the mold in the fluidized bed to fill up the depressions of the mold surfaces with the treating powder by employing a surface treating member for pushing the treating powder into the depressions; and taking the mold out of the fluidized bed. The mold surface treatment allows to make molten metal less likely penetrate into the walls of mold, and to manufacture a mold which generates less amount of gum causing defects during casting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.