Extruder

Details Extruder Extruder

2005-06-10

2008-09-02

Cooley, Charles E (Department: 1797)

Agitating

Rubber or heavy plastic working

With specified vent means

C366S085000, C366S088000

Reexamination Certificate

active

07419295

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.

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patent: WO 03/020483 (2003-03-01), None

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