Planetary roller extruder with fragmented planetary roller spindles

摘要

Planetary roller extruder for the treatment of a crop with a driven central spindle, planetary roller spindles and a surrounding fixed housing, wherein the central spindle is externally toothed, the planetary gear spindles are externally toothed and the housing has an internal toothing, wherein the teeth of the planetary roller spindles and the toothing of the central spindle mesh with each other and wherein the toothing of the planetary roller spindles and the internal toothing of the housing mesh with one another, such that the planetary roller spindles in the housing revolve around the rotating central spindle and the feed material is machined between the teeth and conveyed longitudinally through the extruder, wherein the planetary roller spindles slide against a thrust ring on the rear end in the conveying direction of the feed material through the extruder, wherein the planetary roller extruder consists of a plurality of planetary roller extruder sections, characterized by fragmented planetary roller spindles, wherein the planetary roller pieces (110, 111) of a planetary roller spindle are aligned and in contact with each other, wherein the planetary roller pieces loosely abut each other at least in the longitudinal direction, wherein a piezured planetary roller spindle extends over two and more planetary roller extruder sections connected in series, wherein the length of the planetary roller pieces (110,111) is at least 4D, preferably at least 5D, where D is the pitch circle diameter of the teeth of the planetary roller pieces (110,111).