Device for preparing plastic material

A device for the preparation of plastics material, in particular thermoplastic plastics material, has a receiving container ( 1 ) for the material, the interior of the receiving container ( 1 ) having tools ( 21 ) provided therein which are arranged on a carrier disc ( 9 ). The tools are driven by a shaft ( 4 ) for rotation about the, in particular vertical, axis ( 8 ) of the shaft ( 4 ). At least one screw ( 17 ) is provided for the removal of the material out of the receiving container ( 1 ). The screw housing ( 16 ) has a feed opening ( 27 ) which is connected with respect to flow to a discharge opening ( 15 ) in the container ( 1 ), which discharge opening ( 15 ) is situated at a lower level than the carrier disc ( 9 ) and the tools ( 21 ) carried by it. Further moved tools ( 12 ), which convey the material into the discharge opening ( 15 ), are provided in the receiving container ( 1 ) below the carrier disc ( 9 ). The carrier disc ( 9 ) comprises at least one aperture ( 36 ) which connects the space ( 26 ) above the carrier disc to the space ( 10 ) below it, in order to divert water vapor and/or gaseous substances out of the space ( 10 ). The apertures ( 36 ) are situated close to the axis ( 8 ) and close to the trailing edges ( 37 ) of the tools ( 21 ) during the rotation of the carrier disc ( 9 ).