New Systems for Continuous Melt Filtration
At the booth of Ettlinger Kunststoffmaschinen GmbH, Königsbrunn, Germany, the issue of melt filtration is at the center of the presentation. The ERF 500 is part of the ERF melt filter series and is now available as a standard equipment. It is designed for highly contaminated melts, most of all in plastics recycling. The new type also has a very compact size. With melts contaminated by up to 18 wt.-% of soiling and foreign substances, and at output rates up to 5 t/h, its filter service life is long. Initially presented at the trade show, too, the ECO melt filter is designed for film and sheet extrusion applications (Fig.). It is due to remove effectively the material shares that are cross-linked or highly molecular, as well as gels and partial contamination, while achieving long service life. The melt filter is available at two sizes, i. e. as ECO 200 designed for up to 1,000 kg/h and as ECO 250, for 2,500 kg/h output rates. It is designed to process contaminations up to 1.5 wt.-%. A rotating cylindrical filter screen with millions of conical bores is the central element of both the ERF as well as ECO melt filter system. The foreign particles sitting on the outside of the slowly turning filter drum are continuously moved towards a stripper by the filter drum. In the ERF filter, a discharge screw takes over the foreign particles to convey them out of the filter system. A novel type of discharge shaft performs this task in the ECO filter. As a result of the contaminant enrichment reaching up to 70 % in continuous discharge operation, melt loss is very low. Both filter systems’ filtering area is constantly open throughout production, thus enabling constant melt pressure after the filter screen.
Fakuma Hall A6, booth 6212
Ettlinger Kunststoffmaschinen GmbH
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