Method and apparatus for processing of plastic material

A method for treatment of plastic material, comprising:

• providing a device, the device comprising:
• a receptacle into which the material can be brought for processing, comprising a removal opening in a lower part thereof, through which the processed material can be removed from the receptacle, wherein the receptacle is subdivided into at least two chambers that are separated from each other by an intermediate base;
• at least one mixing or comminution tool situated in each chamber, wherein the material can be brought into a softened but permanently lumpy or particle-shaped and non-molten state by the mixing or comminution tool;
• and
• means that cause or allow an exchange or a transfer of the softened, lumpy, non-molten material between adjacent ones of the chambers;
• wherein a topmost one of the chambers has a greater diameter than other ones of the chambers that lie below in the direction of material flow;
• guiding the material consecutively through the chambers;
• processing the material with the mixing or comminution tools to thereby bring the material into a softened, non-molten state in which the material permanently remains lumpy or particle-shaped, and keeping the material wholly in this condition;
• and
• subjecting the material after a last one of the chambers to a densification step and bringing the material out into an extruder.