Mold clamping apparatus for injection molding machines and mold-opening control method therefor
US6468449B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/6714
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molding machine mold clamping device (1) comprising an electromechanical mold opening and closing mechanism, a hydraulic mold clamping. mechanism, and a mold thickness adjustment device, said mold thickness adjustment device comprising a first detection device (70) for detecting the position of a mold clamping ram (51), a second detection device (90) for optically detecting the position of a half nut device (20), and a mold clamping ram position control device (90) for hydraulically holding and controlling the position of the mold clamping ram (51). The position of the half nut device (20) is held by hydraulic control at the mold thickness adjustment position during mold opening and closing. In the initial mold opening and closing operation, the large mold opening force exerted by the mold clamping ram (51) may be used to open the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.