Core blowing machine
US5072775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | May 7, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C15/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A foundry core blowing machine includes an upright frame with a blow head for a sand-resin mix fixed at the top. Sectionalized vertically movable rods extend through bushings at the top and bottom of the frame. Fixed to the rods are a cope support and a secondary table. The secondary table supports the cylinder of a cope-drag clamp piston-cylinder assembly with the rod of such assembly being connected to a primary table thereabove which slidably moves on the rods. The secondary table and the rods secured thereto are elevated independently of the cope-drag clamp so that the clamped cope and drag may be elevated to be clamped against the blow head, lowered for interposition of a gassing head, and reclamped for cure, all while the cope and drag remain firmly clamped together. Only after curing are the cope and drag unclamped for lowering, stripping and removal of the core from the machine. The continuous high pressure clamp of the drag to the cope during blow and subsequent cure, even though the assembly is unclamped from the blow head prevents sand from entering between the abutting surfaces of the cope and drag and the forming of finning. The rods are formed in sections with the cen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.