Apparatus for the pretreatment and subsequent conveying, plastification or agglomeration of plastics, in particular of thermoplastics waste for recycling purposes, with a container for the material to be processed, where the arrangement has, in the container, at least one mixing and/or comminution implement which rotates around an axis of rotation and which is intended for the mixing, heating and optionally comminution of the plastics material, where the mixing and/or comminution implement comprises implements and/or blades, which with their frontal edges, in the direction of rotation or movement, have a mixing, comminuting, cutting and/or heating effect on the plastics material, where an aperture through which the pretreated plastics material can be removed from the interior of the container is formed in a side wall of the container in the region of the level of the, or of the lowest, mixing and/or comminution implement that is closest to the base, where at least one conveyor, in particular one extruder, is provided to receive the pretreated material, and has at least one screw which rotates in a housing and which in particular has a plastifying or agglomerating action, where the housing has, located at its end or in its jacket wall, an intake aperture for the material to be received by the screw, and there is connection between the intake aperture and the aperture, where the setting angle (γ) of the radially outermost mixing and/or comminution implement, closest to the base, or of the radially outermost implement and/or blade complies with the following relationship: γ = k * d + K, where d is the diameter of the screw in mm, Kis a factor in the range from 15 to 35, k is a factor in the range from 0.08 to 0.2, where the setting angle (γ) is measured at the radially outermost point of the mixing and/or comminution implement, closest to the base, or of the implement and/or blade, that is, between the continuation of the, in particular straight, frontal edge and the radius running through the point, and in that the ratio of the length of the screw, measured from the edge situated downstream in the direction of conveying of the screw, or from the point of the intake aperture, situated furthest downstream, to the end of the screw or to the first discharge aperture in the housing for the melt situated furthest upstream in relation to the direction of conveying of the screw at the distal end of the screw remote from the container, to the nominal diameter (d) of the screw is ≥7, preferably ≥ 10 and the imaginary continuation of the central longitudinal axis of the conveyor or of the screw closest to the intake aperture, in a direction opposite to the direction of conveying of the conveyor, passes, and does not intersect, the axis of rotation, characterized in that, on the outflow side or downstream in the direction of rotation or of movement of the mixing and/or comminution implement, an offset distance between the longitudinal axis of the conveyor or of the screw closest to the intake aperture, and the radius of the container that is parallel to the longitudinal axis and that proceeds outwards from the axis of rotation of the mixing and/or comminution implement in the direction of conveying of the conveyor.