Buhler Ag

Achim-Philipp Sturm

Federico Innerebner

Andreas Christel

Jürgen Schweikle

Roland Halter

Bernhard Stalder

Erhard Krumpholz

Christoph Näf

A method is disclosed for producing elastomer compounds for use in the production of rubbers. At least one elastomer to be processed for the production of an elastomer mixture can be slowly added to a mixer/extruder and is mixed and plasticized and/or masticated (melted) while it passes through the mixer/extruder. The elastomer, when slowly added to the mixer/extruder, can be present in a fluid medium in an evenly distributed form.

Elastomer mixtures for rubber manufacture

The invention relates to a multi-shaft extruder for the continuous treatment and/or processing of bulk material, especially a powdery, granular or flocculent product, comprising a plurality of shafts () which are arranged in a crown-like manner in a cavity () of an extruder housing (), said shafts extending parallel to the axial direction (A) of the extruder and forming an inner processing chamber () inside the crown, and an outer processing chamber () outside the crown. Each shaft carries a number of axially successive processing elements (), at least part of the same being elements () having a transporting effect, and with which adjacent shafts engage in a sealed manner at least in partial regions. At least one transporting endless screw element () comprising at least one transporting screw thread () is placed in the region of the supply opening () in the extruder housing (), and does not engage in a sealing manner in at least one partial region along the axial direction (A).

Multi-screw extruder

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Niederuzwil, Switzerland

Achim-Philipp Sturm