MACHINERY | RECYCLING AND GRANULATORS
Right: At Greenplast, Maag showed its Ettlinger ERF 350, a melt filter for contaminated polymer feedstock
– according to factors such as quantity of material, shape, weight, thickness and type of plastic – and optimise the quality of the regrind material. It also minimises the use of electricity: CMG says that one of its units can consume as little as 20-25 Wh/kg – compared to more than 50 Wh/kg for a conven- tional unit. The return on invest- ment (ROI) for the AMP is typically less than 12 months, says CMG. In addition, it has added the EV916 and EV616 models to its Evoluzione series. The series allows a high degree of operational consistency and wear resistance, thanks to the use of harmonic steel, Hardox and modular structures. High precision in the construction of the cutting chamber extends blade duration compared to conventional models. Operating temperature, blade wear, productiv-
ity, operational efficiency and other functional parameters are managed on the machine or remotely – with connectivity based on the OPC-UA protocol.
Recycling innovation Maag of Switzerland showed a number of polymer recycling solutions at Greenplast. Its Ettlinger ERF 350 is a melt filter for filtration
of heavily contaminated polymer feedstock. It is self-cleaning with a rotating, perforated drum,
through which there is a continuous flow of melt from the outside to the inside. A scraper removes contami- nants from the surface and feeds them to the discharge system. This allows the filter to be used automatically over
long periods, without having to replace the screen. Advantages include reliable melt filtration, low melt losses and good mixing and homogenising of the melts. “Our Ettlinger melt filter can
IMAGE: ETTLINGER
extract up to 16% weight volume from plastic, depending on the application – with minimal material loss,” said Alaaddin Aydin, managing director of Maag Germany. In addition, Maag says it
has re-engineered its Extrex gear pumps – which have x6 class design – by redesigning components including shafts, bearings and seals, and optimised interaction of the components. Specially devel- oped gear teeth with low compression allow high pressures to be achieved with low shear rates. “Our sixth-generation pumps – which are also available specifically for recycling applications – can tolerate particle sizes of up to 4mm,” he said. “This means that, even in post-consumer recycling applications, service life has been doubled.” In addition, he said that Maag has completely
redesigned its granulators, so that the same sized machine now has a 40% higher output. Availability
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