SHREDDERS | TECHNOLOGY
IMAGE: WEIMA
of 40 mm, 60 mm, or 80 mm. The W5.18 model, part of a three-model series that includes the smaller W5.14 and larger W5.22 unit, uses an electromechanical drive and Weima WAP gearbox technology as the drive system. Users can select a different drive system from a
employee car park, in a move designed to seal as little ground as possible. Weima exhibited two new shredder solutions for post-consumer plastics recycling at last year’s K show as a further development in its size reduction technologies. The company announced it had revised the WLK 1000 model single-shaft shredder with a new rotor option for secondary shredding. The company introduced the WLK 1000 model as a specially developed high throughput and flexible universal shredder, capable of shredding large start-up lumps, production waste, fibres or films, and large-volume parts made from PE, PP, PVC, PU or PE, such as bottles, buckets, pallets, and containers. The standard machine configuration incorporates Weima’s improved V-rotor in a 370 mm diameter 1,000 mm length design, equipped with 78 cutting blades in three rows. The rotor operates at speeds ranging from 80 to 125 rpm. At K2022, Weima’s WLK 1000 model incorpo-
rated the rotor design from the company’s FineCut line, which is designed as a high-end secondary shredder for multi-stage size reduction systems. Depending on variants selected, the WLK 1000 with the FineCut rotor can achieve particle sizes from 80 to 15 mm, using up to 119 cutting knives arranged into up to seven rows and operating at rotor speeds of 160 to 380 rpm for high through- put. Weima says the FineCut rotor operates according to the shear cut principle, which com- bines in a robust form the properties of a classic shredder with those of a cutting mill. Weima also presented the latest model in its W5
series of universal shredder technology at the K show with the W5.18 unit. The single-shaft unit is typically designed with the company’s V rotor cutting geometry, which features 188 knives installed into the 500 mm diameter, 1,800 mm long rotor that operates at speeds from 50 to 200 rpm. Users have a choice of knife sizes in edge lengths
www.plasticsrecyclingworld.com May/June 2023 | PLASTICS RECYCLING WORLD 43
range of choices to match material type and throughput rates more precisely to a desired operation. This includes an electromechanical drive with belt, high-torque drive with electromechanical drive, belt and multi-pole synchronous torque motor, or direct drive with hydraulic motor. Weima also offers seven different knife designs for its rotors, including flat, concave, extra concave, crosscut, carbide, trapezoid and finecut, while its counter knives, which are firmly screwed into the cutting chamber floor of the shredder, coming in variations that are reversible and adjustable to extend service use. Weima, in cooperation with Precious Plastic (a Netherlands-based organisation comprised of engineers, machine builders and product design- ers to develop machines and tools to recycle plastics) developed an entry-level shredder unit for those who want to start a small recycling business but still want to achieve certain throughput targets. The new Shredder Pro unit, developed for the worldwide community, primarily consists of standard parts, and is designed to be easily reproducible. The shredder’s low connection load between 2.2-4 kW and particularly simple operation makes it ideal for projects in emerging countries and educational institutions. The double shaft shredder design features 6 mm blade widths and can process up to 50 kg/hr depending on the desired flake size. At the K show, an injection press designed by Precious Plastic used plastic flakes shredded by the Shredder Pro unit to produce carabiners. Vecoplan has launched a new double-shaft
rotor shredder for pre-shredding operations in recycling plants or as a sorting or pre-sorting step
Left: Image of Weima’s revised WLK 1000 single- shaft shredder for start-up lumps and other large input
Below: Weima showed the latest model in its W5 series of universal shredders at K2022
IMAGE: WEIMA
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