Method of processing solid polymer particles of a polycondensate by means of a multi-rotation system

A method for processing solid plastics particles from a polycondensate via a multi-rotation system, the method comprising:

• drawing in of the plastics particles and at least partial melting of the plastics particles in a first extruder section with at least one extruder screw rotating in a housing recess of a housing;
• transferring the at least partially melted plastics composition into a second extruder section, which is designed as a multi-screw extruder section with a poly-rotation unit and a plurality of satellite screws rotating therein, a diameter of the poly-rotation unit being increased compared with the screw diameter of the first extruder section and a transition cone being formed between the extruder sections and a conical gap being formed in relation to the housing, the partially melted plastics composition as supercooled plastics melt contains between 5% by volume and 50% by volume of non-melted and non-dehumidified plastics particles;
• forwarding the plastics composition which has been completely melted in the drive zone through a degassing zone in which a vacuum is applied;
• removing volatile constituents from the plastics melt in the degassing zone;
• transferring the plastics melt into a discharge extruder section;
• subjecting the remaining plastics particles to pressureless plasticization by at least parts of the plastics composition being passed through a drive zone that is located downstream of the transition cone in a flow direction and which has exposed drive pinions of the satellite screws;
• and
• reheating, very shortly before entering the vacuum zone, the supercooled plastics melt to such an extent that the remaining plastics particles melt and thereby release the stored residual moisture.