| abstract |
An extrusion process for processing raw material consisting of plastic material and cellulosic material in an extruder (2) in the form of a planetary roller extruder with auger (7), discharge screw (9) and center spindle (8) into an extrudate, the following steps being performed during the circulating operation of the extruder (2), under constant, controlled addition or removal of thermal energy over the entire length of the extruder, in particular by the combustion and introduction of gas and / or the addition of compressed air, are passed through: a) filling the plastic material and the cellulosic raw material, in a filling zone of the auger (7), b) homogenizing by mixing and compressing the raw material through the auger (7), c) transporting the raw material into a homogenization zone of the extruder (2) by means of the intake screw (7), d) mixing and comminuting the raw material through the central spindle (8) and around these planetary planetary gear rollers, e) transporting the raw material from the planetary roller extruder into an ejection zone of the extruder (2) through the discharge screw (9), f) discharging the ... |