Two-platen mold-clamping apparatus
US6179607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1994 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/66
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A two-platen mold-clamping apparatus is provided, which requires neither tie bars nor rear platen, and is thus comprised of a reduced number of components, is easy to maintain, and is low-priced. A plurality of ball nuts are mounted on a movable platen so as to be rotatable but axially immovable relative to the movable platen. The movable platen mounted for reciprocal motion relative to a stationary platen. A respective ball screw is threadedly engaged with each of the ball nuts and each balls screw has an end portion that is fixed to the stationary platen. A motor rotates the ball nuts by means of sprockets and a chain so that the ball nuts and the movable platen are moved toward the stationary platen. The ball screws are moved longitudinally relative to the movable platen so as to generate a mold-clamping force after a mold-touch state has been reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.