Die clamping unit and die clamping method
US7566214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2005 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Apr 15, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/561
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Used in a method of this invention is a die clamping unit, which comprises a tie bar movably attached to a stationary platen, a halfnut positioning servomotor which advances and retreats the tie bar, a halfnut which is provided on a movable platen and fixes the movable platen and the tie bar together by engaging the tie bar, an engaging mechanism which engages the halfnut with the tie bar, a hydraulic die clamping cylinder which presses the stationary platen and the movable platen, and a control device which controls the halfnut positioning servomotor and the hydraulic cylinder. The control device drives the halfnut positioning servomotor to remove a clearance between the halfnut and an engaging groove of the tie bar before a die clamping process carried out by the hydraulic cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.