Molding process of disk with shaft shaped portion
US6997019B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 9, 2002 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/80
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A press die and a molding process can form a disk member having a shaft shaped portion at a center with satisfactory circularity and flatness in a disk portion, dimensional precision in the shaft shaped portion, and concentricity between the disk portion and the shaft shaped portion at the center. The press die is designed for press molding of a glass substrate of a disk member with a shaft shaped portion at a center thereof. The press die includes an upper die forming an upper surface of the disk member, an intermediate die having a shaft forming hole portion for forming a shaft shaped portion projecting from a disk portion of the disk member, a lower die for forming a lower surface of the shaft shaped portion and a guide member for guiding the upper die, the intermediate die and the lower die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.