MACHINERY | MELT FILTRATION
Right: W. Müller says the compact screen changer for EBM extruders is safe to operate manually. To simplify the process, for example, a cordless screwdriver can be used
ing a surface area of 5.552 cm² or and 7.592 cm². MP3 is an Italian extruder of premium rigid plastic for thermoforming parts in furniture, automotive, building, sanitaryware, and elsewhere. At its factory in Bologna, it produces high-quality heavy gauge multi-layer sheet using PMMA, ABS, and HIPS, as well as thin gauge PET, PP, and HIPS. In addition to the closed loop recycling of all internal PET scrap, it is now focusing on increasing the amount of recycled internal scrap from styrenics in its final products. Five years ago, MP3 replaced three of its existing
screen changers with Gneuss SFXmagnus units on one of its sheet co-extrusion lines, because it wanted to use high percentages of recycled material without compromising product quality. Gneuss says that the upgrade allowed MP3 to add up to 50% regrind without either process disturbances or quality issues, even with a high contamination load. The SFXmagnus has an extremely large active
Below: One of several sheet coextrusion lines at sheet extruder MP3 that now use Gneuss
SFXmagnus screen changers
filtration area for its overall external dimensions, which means that it is especially well suited for retrofitting to existing lines. As with all the Gneuss Rotary Filtration Systems, the screen packs can be changed during normal production, without pressure spikes or other disturbances. In 2020, MP3 retrofitted another line with three SFXmagnus systems and a further line was retrofit- ted with another three units early this year. German blow moulding equipment company
W. Müller has developed a new compact screen changer for its extruders, to facilitate the use of PCR in bottle production. The screen changer can be retrofitted and does not require any special safety precautions, as it does not have its own drive. It can be operated manually or, for example, by using a cordless screwdriver without effort. For PCR processing, Müller offers the ReCo3 system for its extrusion units, consisting of three
independent extruders. The PCR layer is enclosed in the middle by two layers of virgin material. The extruders are mounted vertically for this process. Managing Director Christian Müller says: “Tradition- ally, there are no screen changers for such extruders, we are one of the very few suppliers on the market. Normally, the changers are too long to install vertically without risking the stability of the extruder.” He says: “A retrofit of a ReCo3 system with the
matching screen changers in most cases is possible without any problems. In this way, we are able to offer every interested company to get started with PCR processing.” The compact design is possible because the
screen changer is integrated into the connection piece between extruder and extrusion head. By retrofitting a screen changer, the extruder is not significantly extended.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.britas.de �
www.maag.com �
www.ettlinger.com �
www.bbeng.de �
www.nordson.com �
www.fimic.it �
www.ilpa-mp3.com �
www.gneuss.com �
https://mueller-ebm.com �
http://processfiltrationproducts.com
26 PLASTICS RECYCLING WORLD | March/April 2022
www.plasticsrecyclingworld.com
IMAGE: MP3
IMAGE: W MÜLLER
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