Method of curing hot box sand cores
US5365995A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/123
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A core box has (i) a thermally conductive cope and drag resiliently sealingly mating at essentially a horizontal parting plane, and (ii) core defining walls enclosing an interior and perforated by sand-filtered ports. A sand, resin and liquid catalyst mixture is blown into the interior to form a sand body. At least the outer skin of the sand body is conductively heated to a first temperature (i.e., 300-400.degree. F.); and essentially simultaneously with the conductive heating, the remainder of the sand body is convectively heated by flowing a heated gas therethrough at a second temperature lower than the first temperature (i.e., 250-290.degree. F.). The heated gas enters the sand body from the drag and exits the sand body by way of the cope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.