Injection unit
US7811080B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2006 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/824
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is directed to an injection unit, in particular for an injection molding machine, comprising a screw which is guided in a plastication cylinder in a rotatable and axially movable manner and via which plastic material undergoes plastication and can be injected into a tool cavity. The screw is driven via an electric drive including an electric motor and is operatively connected to a support cylinder having a pressure chamber to which dynamic and/or support pressure can be applied during plastication and injection. The electric motor is coupled to a hydrostatic machine which during plastication is driven by the pressure medium displaced from the pressure chamber and which during injection conveys pressure medium into the pressure chamber so as to build up support pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.