Method of producing a core for a fuel injector
US4932251A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 22, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Dec 22, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K21/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A bar-like workpiece is axially compressed to form a flange at the intermediate portion thereof. Then, the workpiece with the flange is held by dies and its one axial end surface is received by a receiver die. The receiver die has a recess formed at the central portion of its end surface for accommodating a slug flowing from the workpiece. The end surface of the receiver die around the recess forms a surface to receive the workpiece. From the side opposite to the receiver die a punch is continuously pressed into the workpiece beyond the flange position to form a sleeve insertion hole. Next, a residual material left at the bottom of the sleeve insertion hole is punched out by another punch, completing the fuel injector core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.