Compact die closing unit for injection molding machines
US4105385A · kind A · utility
Inventor
Key dates
| Filing date | Jul 14, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Jul 14, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/6771
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A compact die closing unit for injection molding machines with four pull-type hydraulic linear actuators and an oversize multi-plate injection molding whose stationary die plates engage the piston rods with centering bores, thereby extending the piston rod support in the die separation plane, and whose movable die plates similarly engage the piston rods with centering bores, so as to be carried by the piston rods directly, without the need for a movable die carrier plate and a stationary cantilever frame supporting the latter. The hydraulic supply lines for the power piston bypass control valve are arranged in the auxiliary cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.