Driving apparatus for electrically-operated injection molding machine
US5804224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/4036
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A driving apparatus for an electrically-operated injection molding machine not requiring any bearing nor any connector. An electric motor having a rotor shaft on which a ball screw is integrally formed is mounted on one of a cross-head and a rear platen of a clamping mechanism, while a ball nut threadedly engaged with the rotor shaft is fixed to the other of the cross-head and the rear platen to constitute the driving apparatus for linearly moving the cross-head. As the ball screw is integrally formed on rotor shaft, any connector for connecting these two members is unnecessary. As the ball screw is directly rotated by the motor positioned coaxially with the ball screw, any bearing for bearing a redial force acting on the ball screw and rotor shaft. The apparatus may also be applied to an ejection mechanism, an injection mechanism and a nozzle touch mechanism of the electrically-operated injection molding machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.