Extruder
US7419295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Sep 20, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/402
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extruder includes a barrel and a kneading screw extending through the barrel in a rotatable fashion. The kneading screw is provided with a devolatilization portion. The devolatilization portion includes a kneading flight that is twisted in a direction for transferring a material downstream. The kneading flight kneads the material while transferring the material downstream and separates a volatile component from the material. Impregnation sections, which allow the kneading chamber to be impregnated with the material, are respectively disposed adjacent to an upstream side and a downstream side of the devolatilization portion so that the air-tightness of the devolatilization portion of the extruder is maintained. Accordingly, an efficient devolatilization operation of the material is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.