In cooperation with the Institute for Polymer Extrusion and Compounding at the Johannes Kepler University in Linz (IPEC), KraussMaffei Berstorff has carried out scientific tests on mixing systems in several simulation series.

The company is now using the consistently positive results of the investigation to optimise its single-screw extruders given the changing market requirements, with the primary aim being to improve final product quality further.

The basis for innovative and balanced mixer-element geometries

“The use of balanced mixing elements in single-screw technology has for many years been our main principle because it guarantees the customer’s manufacture of premium-quality products,” said Dr Ing. Otto Skrabala, a development engineer at KraussMaffei Berstorff at the Munich location.

The influence of two elementary geometries on the feed and mixing process was examined using numerical flow simulations. Scientifically sound design strategies can then be formulated on the basis of this analysis.

For example, factors such as the speed distribution in the flow channel, the pressure consumption or even the temperature have a decisive effect on the quality of the extrudate, and therefore also the end product. Perfect homogeneity can thus be achieved only through the use of balanced mixing elements.

“We will continually use the consistently positive results of the study in our development activities, with the primary aim of ensuring even higher product quality for the customer with the use of our single-screw extruder,” concluded Dr Skrabla.

Further information is available at

As a scientific institute, IPEC focuses on themes of relevance to industry, such as the further development of machine and process technology. Further focal areas of research are the fields of compounding and recycling, as well as the improvement of production and resource efficiency.

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