RECYCLING & GRANULATORS | MACHINERY


Size reduction Neue Herbold, which offers size reduction and recycling machinery, showcased its recently re-engineered ZM 800 Pulverizer at K2025. One major update is the optimisation of its


housing. In the past, machines of this type were made with a round housing on a platform – but now the new housing has a curved design. The reason for this is that the material’s angular mo- mentum is used for the discharge, as it is pre-accel- erated for the subsequent air conveyance. This results in higher throughput rates, while the energy consumption is unchanged. Standard machine extensions like the vibro- feeder or mounting bracket for the vacuum feeder blend into one compact machine concept. Mean- while, all parts offer good accessibility. The machine also has an optimised door lock, which operates efficiently and with less space require- ments. Cables, connections and sensors are now housed in one central processing unit, while the control unit for the water injection is now placed in a dust-proof, splash-proof housing. The clear design and the compact construction


offer simple operation as well as easy maintenance for customers, says the company.


Shredder update Weima presented the latest version of its W5 single-shaft shredder series at K2025. One highlight of the W5.22 is a wider inspection


flap, offering more space for maintenance work. In addition, access from the rear is now automatic and the swing arm can be locked more conveniently, which speeds up maintenance. The new diagonally mounted signal tower, which can also display the hopper fill level if required, ensures greater transparency during operation. The measuring machine has a high-torque drive including servo controller – a new development from Baumüller in collaboration with Nidec Desch. This direct drive solution is designed for demand- ing applications with difficult-to-shred plastic fractions. This arrangement achieves high torque even at low speeds. Thanks to a connection between the drive and rotor shaft, the power transmission is optimised to allow higher drive power. The drive system enables cost-saving operation and sustainable production. The W5.22 processes hard plastics, films and


fibres, plus a variety of other materials. A rotor with a length of 2,200mm and a diameter of 500mm ensures effective shredding. The redesigned swing arm pusher ensures better material guidance during


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shredding, while the redesigned table surface ensures more aggressive material feed and raises power transmission by up to 20%, according to the company.


Customers can choose from several drive concepts to adapt the machine to their own process- es. A hydraulic drive is particularly suited to applica- tions with frequently changing loads. The robust drive ensures high torques with a low kW output. Patrick Hensler, sales director at Weima, says that confidence in post-industrial recycling is high. “A pipe manufacturer, for example, has their own


production waste,” he said. “This is clean and does not incur the same high costs as post-consumer waste. There is pressure to recycle post-production waste, to avoid disposal costs. Companies would rather invest in a recycling solution than cope with high logistics cost every month.”


Shredding waste Wursi of Spain shreds around 1,500 tonnes of PE and PP into regranulate every month, using two Weima W5.14 single-shaft shredders on its recy- cling line. It first processes sorted plastic waste manually and feeds it into the two shredders – which shreds the material to 30-100mm pieces. The shredder is designed for demanding plastic


applications. A V-rotor with a diameter of 500mm and a length of 1,400mm ensures uniform shred- ding even with tough materials. A Siemens PLC control system with touch panel allows precise adjustment of operating parameters. A hydrauli- cally opening screen basket and inspection flap help to reduce downtime during maintenance or screen changes. Wursi uses interchangeable screen segments


that can react flexibly to material differences – an advantage with changing polyolefin streams, says the company.


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Below: Wursi uses two Weima shredders to make PE and PP granulate


IMAGE: WEIMA


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