Molding die machining electrode, fabricating method of molding die, and molding die
US8178815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2008 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Sep 23, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H2200/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a molding die machining electrode, slit grooves of a molding die are machined with a slit groove forming part having a substantially circular outer circumference by arranging hexagonal erected wall parts in a row; while the inner circumference of a slit groove forming part overlaps with the erected wall parts in the outer circumference of the slit groove forming part, the outside slit grooves are machined with the slit groove forming part having a substantially circular outer circumference. The further outside slit grooves are machined with the slit groove forming part of the third electrode. A plurality of the slit groove forming parts are radially divided and overlapping portions between the plurality of the slit groove forming parts are formed substantially coaxially with a molded body. The areas of the slit groove forming parts are designed to nearly similar values, suppressing the difference in wear of the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.