Buhler Ag

Achim-Phillipp Sturm

Andreas Christel

Federico Innerebner

Jürgen Schweikle

The method of degassing is performed in a ring extruder wherein at least one process chamber is provided with at least one degassing opening. The radius R of the conveyor element in the degassing zone is smaller by &#x394;R than the full radius Rv of the conveyor element required for the mutual stripping of adhering product in a closely intermeshing screw operation with adjacent conveyor elements.

Method of degassing a flowable mass in a ring extruder

The invention relates to a multiple-screw extruder that comprises a first process chamber () and a second process chamber (). In the degassing zones of said extruder, at least the first process chamber is provided with at least one degassing opening. The radius R of the conveyor element in the degassing zones, in at least one conveyor element () of at least one screw () configured as a passage screw, in a subsection configured as a passage subsection (), along the peripheral direction of the at least one conveyor element () is by &#x394;R smaller than the full radius Rv of the conveyor element () required for the mutual stripping of adhering product in a closely intermeshing screw operation with die adjacent conveyor elements () of adjacent conventional screws (). The invention also relates to a method for degassing viscous or elasticoviscous flowable masses in such a multi-screw extruder having several process chambers, the respective process chambers communicating by means of a connecting opening.

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Niederuzwil, Switzerland

Achim-Phillipp Sturm