disclosed in an apparatus for the processing of plastics , with a container with a rotatable mixing implement , wherein a conveyor being provided , with a screw rotating in a housing , wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation , there being , on the outflow side , an offset distance between the longitudinal axis and the radius that is parallel to the longitudinal axis , and wherein the smallest possible distance between the implement and screw is described by the following relationship : ms ≦ k * d + k , where d is the diameter of the screw in mm , k is a factor in the range from 20 to 100 , more particularly 20 to 80 , k is a factor in the range from 0 . 03 to 0 . 4 , more particularly 0 . 04 to 0 . 25 .