Basis for a high product quality of elastomers is a thermal and substantial homogeneous rubber mixture. In addition to distributive mixing, dispersive mixing is important for the quality of the rubber compound. There are two reasons for the significance of high filler dispersion: Firstly, an inadequate dispersion of the fillers can be responsible for mechanical damages in the elastomer products. Secondly, a higher grade of dispersion increases the reinforcement effect of active fillers like carbon black because of the high specific surface of sufficiently dispersed filler particles. In order to reach a high grade of dispersion it is desirable to stimulate the dispersion mechanisms break and erosion not only in the mixing process but also in the extrusion process. The geometry and the arrangement of pins, which loom radially into the screw channel and have been cylindrical until now, constitute a possibility to influence the shear stress and the grade of dispersion in the extrusion process. Simulative and experimental techniques are used to optimise the mixing behaviour in this cooperative project between the Kunststofftechnik Paderborn (KTP) and the Institute of Plastics Processing (IKV). On the one hand, the KTP prepared a CFD simulation for the pin-type extruder. The simulation and analysis of different boundary conditions, like pin design, rotational speed and material parameters, is possible. On the other hand, experimental investigations were performed at the IKV (19 mm pin-type extruder) and the KTP (60 mm pin-type extruder). Parameters like pin design and arrangement, number of pins and temperature profile were diversified. Samples were taken before and after the extrusion process at every testing point. The grade of dispersion of these samples was investigated using different methods at the IKV. Simulative and experimental results were tested for correlation, in order to optimise pin design and arrangement regarding the dispersion efficiency.