Compressor unit in an injection-compression molding machine
US4906173A · kind A · utility
6Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1989 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Apr 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A compressor unit of an injection-compression molding machine having a movable platen and a stationary platen. The compressor unit includes a compression pin (32) fixed to the end of a ball screw (29) threadedly engaged with a ball nut (24) which is coupled, by means of a power transmission mechanism (35), to a servomotor (19) attached to the movable platen (3). As the servomotor rotates, the compression pin moves axially together with the ball screw relative to the movable platen to project through the movable platen toward a mold clamped between the platens to cause molten resin filling the mold to be compressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.