Melt Filters ECO and ERF
Melt Filtration for a Wide Field of Use
The central element in a melt filter variant from Ettlinger Kunststoffmaschinen GmbH, Königsbrunn, Germany, is a rotating cylindrical filter screen with conical holes that is available for graduated levels of filter fineness. As the melt flows through, the impurities remain on the outside of the filter screen, while the cleaned melt inside the filter drum is conveyed by a channel system to the downstream pelletizer or die. The filter screen is cleaned by a scraper with every revolution. During cleaning, the particles that are scraped off are fed continuously to a discharge system powered by its own servomotor and the impurities are removed from the filter.
The melt filters ECO and ERF shown in the Figure, each of which has been designed for different fields of application, are being presented. The recently developed ECO melt filter is designed for use in film and sheet extrusion in particular. Designed for impurity levels of up to 1.5 wt.-%, It removes cross-linked and high-molecular-weight material components such as gels or partial contaminants contained in the melt when processing virgin material. In contrast, ERF melt filters are used when processing melts having impurity levels of up to 18 wt.-%, making them well-suited for processing recycled plastic. The latest addition to the ERF filter line is the size ERF 500 for throughputs of up to 6 t/h. Both filter types present a constant open filter area during production, ensuring a consistent process, volume and pressure. With their compact and space-saving construction, they can also be integrated into existing extrusion lines.
Fakuma Hall A6, booth 6209
Ettlinger Kunststoffmaschinen GmbH
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