New UG 750W underwater pelletizer offers increased wear protection in medium capacity segment
bearing , pelletizer hood and drive train ( UG750 ). Due to the wider cutting circle and an optimized arrangement of the die holes , it has been possible to increase the number of holes in comparison with the UG750 by just about 27 % to over 5700 and so achieve the desired increased throughput .
At K 2016 , Coperion introduced the die plate of the new UG 750W underwater pelletizer . Designed for producing polyolefins and capable of achieving throughputs of 60 to 70 t / h , the new pelletizer covers the medium capacity range . The pelletizer ’ s large die plate will be manufactured from a newly developed material which is highly resistant to both abrasion and corrosion and can double service life .
The new UG 750W pelletizer is an economically attractive solution which bridges the existing gap in capacity between the UG750 with its maximum throughput of 55 t / h , which is very widely used in PE applications , and the much larger UG1000 for throughputs of up to 82 t / h . Based on the UG750 , the new pelletizer is equipped with the extended cutting surface from the UG1000 .
Thus , the system makes use of components which have proven themselves over many years both for the die plate / blade system ( UG1000 ) and for the mechanical components blade shaft
Because it makes use of products from Coperion ’ s existing range , the UG 750W offers those users who already have a UG750 pelletizer the option of achieving a distinct increase in pelletizer throughput . All that needs to be done is to replace a small number of components , so making such an upgrade very manageable both technically and financially .
The UG 750W ’ s large die plate will be produced from NikroDur , a wear protection material which Coperion has jointly developed with DEW Deutsche Edelstahlwerke GmbH . In comparison with conventional ferro-titanite , this metal matrix composite produced by powder metallurgy has at least 50 % higher wear resistance combined with more than one third higher corrosion resistance .
The material ’ s one fifth lower thermal conductivity optimizes plate temperature management and the cuttability of even low viscosity melts . In addition , NikroDur ’ s thermal expansion properties , which match those of the base material , permit an optimized arrangement of the individual wear protection segments . In pilot applications , using this new material has doubled service life in comparison with the previous state of the art .
WN DECEMBER 2016 6