Press forming apparatus for sintered parts
US5156854A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1992 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jan 30, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F5/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a press forming apparatus for forming spiral parts, a plurality of first connecting rods are mounted on a lower end of a divided core divided from a die in shifting relation to each other in a winding direction of vortex. The plurality of first connecting rods are supported by a vertically movable core plate, while a plurality of second connecting rods are mounted on a lower end of a lower punch in shifting in position relation to each other. The second connecting rods extend respectively through bores in the core plate, and are supported by a lower punch plate movable vertically and arranged below the core plate. Further, the first and second connecting rods extend through a stationary block. The stationary block is arranged between the die and the core plate, for restricting downward movement of the lower punch and the divided core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.