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PELLETISERS | MACHINERY


Getting the cut right


Selection of the most appropriate pelletising system is important in running an effective compounding operation. Mark Holmes learns more about the latest developments


Compounding operations are far from standard and manufacturers of pelletising systems are working hard to meet an increasingly wide variety of demands. Some applications require a pelletis- ing system built simply to manage high production throughputs; others demand flexibility and rapid changeover features for short run production. All, however, must offer reliability and easy mainte- nance, while seamless interaction with other compounding line equipment is becoming an essential requirement. In addition, more demand- ing polymer compounds call for new pelleting solutions. Underwater and strand pelletising technologies continue to be the systems of choice for specific applications, but variations on conven- tional approaches are emerging.


www.compoundingworld.com Head of Engineering at Coperion Pelletizing


Technology Stefan Wygas highlights a number of developments in compounding that are driving changes in pelletising systems, including higher throughputs, automation and flexibility. “Higher throughputs usually require bigger machines,” he says. “However, there are disadvantages in the handling and processing of strands with conven- tional water bath systems. As a result, Coperion has developed the SCP semi-automatic and ASC fully-automatic strand pelletising systems. In particular, these have been designed for highly filled or reinforced materials, which cannot be processed on underwater pelletisers.” Wygas explains that the working principle is the same as for conventional systems — cooling by


Main image: Pelletising systems must be selected to meet the needs of the specific compounding application with through- put, flexibility and rapid changeover top priorities


January 2019 | COMPOUNDING WORLD 45


PHOTO: INTELLIGENT PELLETIZING SOLUTIONS


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