TECHNOLOGY | MELT FILTRATION
of sizes, versions and capacity options. The latest development in the company’s filter technol-
ogy is the new DischargePro control system which significantly increases the level of automation. It reacts to fluctuations in contamination in the input material by constantly refining and adjusting the rotational speed of the filter scraper disc and discharge screw as and when
required. This ensures consistent thickening during melt filtration, which is an important parameter for a constant and economical process and ensures an optimum thicken- ing ratio for a high proportion of
Above: Break Machinery has taken on ADG Solutions as a new distributor for its melt filters in the US
filtered contaminates while minimising the propor- tion of melt in the filter discharge.
Discharge control Depending on the application, material, degree, type and contamination, the new control system has the capability to reduce melt loss during filtration significantly. The company said one of the first customers to compare the DischargePro to the previous Erema laser filter control system could save around 50%. With DischargePro, operators benefit from easier operation due to higher automation and are required to carry out less adjustment work. This saves costs, as less time and labour is required. Robert Obermayr, Head of Business Unit Powerful, said: “Efficient filtration is essential for a stable
recycling process. At Erema, we can draw on 30 years of experience in melt filtration. The new DischargePro control system for our laser filter is a major step forward. It significantly increases the level of automation and makes it much easier for recyclers to master challenging filtration tasks. This applies even when highly trained personnel is missing.” ADG Solutions, a recycling equipment distributor and supplier based in Tucker, Georgia, US, has recently expanded its product line to include Break Machinery. The Italian company offers a range of automatic and efficient filtration equipment and recently introduced the Duo self-cleaning double filter system. This new design is considered extreme- ly suitable for fine or course filtration, and can filter heavy levels of contaminants with the help of a double screen design which achieves maximum productivity while guaranteeing high product quality. The Duo offers a constant pressure operation to maximise line productivity with minimal waste for even the highest contaminated materials. The new geometry of the scraper disc and the innovative discharge system allows contamination to be removed in a rapid and controlled manner, while the shape of the six-blade rotating scraper disc is said to offer excellent cleaning, even at low rotational speeds, while also preventing filtered contaminants from returning into the melt. The company said the unit is simple to operate and the general design reduces cleaning and replacement times for both the filter and blades. “We are continually looking to find the best equipment solutions to enhance our portfolio we provide to our customers,” said Sandy Guthrie, ADG
Coperion’s new single-stage system
Coperion has introduced the ZSK FilCo filtration compounder, which allows filtration and compounding in a single step. In conventional recycling plants, PCR and contaminated polymers must first be melted using a single or twin screw extruder, then filtered and pelletised before being upcycled. In this production set-up, the recyclate is subject- ed to high thermal stress which results in a reduction in product quality. The ZSK FilCo makes it possible to melt, filter, com- pound, and pelletise recyclate in a single production system.
38 Waste plastic is fed into the
extruder in the form of regrind, fibre pellets, film flakes, or agglomerate, and is then melted, homogenised, and devolatilised before being fed
through an integrated filter that removes contaminants and then is reintroduced into the ZSK extruder process section where additives are introduced. Marina Matta, Team Leader Process
Technology Recycling at Coperion, said: “The ZSK FilCo’s excellent energy economy and the high end product quality that it achieves are important benefits that will make PCR and polymer recycling more attractive for many companies.”
IMAGE: COPERION
Coperion’s new ZSK FilCo filtration compounder
PLASTICS RECYCLING WORLD | March/April 2024
www.plasticsrecyclingworld.com
IMAGE: BREAK MACHINERY
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