TECHNOLOGY | SHREDDERS
Above: Lindner’s Jupiter BW series can consistently shred input film material to an exact particle size
which usually must be disposed of, says Stefan Scheiflinger-Ehrenwerth, Head of Product Manage- ment at Lindner. The unit reduces the generation of waste fines through application of a gently slow running but powerful shredding operation with special control parameters. The precise cut greatly reduces the bad fraction to be disposed of, with more material retained in the recycling system. The single-shaft shredder features double
Right: Lindner’s new Micromat HP single-shaft shredder series has an adjust- able knife system
cutting counter knives and pointed knives that allows for continuously high output rates even with tough materials. The robust, square cutting system and cutter holders deliver long service life even while handling foreign objects. A countershaft drive stores and releases rota- tional energy depending on the load, for more power with less energy consumption, while additional flywheel mass helps to process tough materials. A torque-limiting safety clutch protects against damage to the cutting unit immediately when blockages are caused by foreign objects, while sensors facilitate controlled powering down of the machine to preserve all other drive compo- nents. The unit also incorporates Lindner’s internal pusher design for secure machine feedings and a swivel-mounted, hydraulically operated screen unit that allows for one-person changeout of screens with various mesh widths, or access to the unit for maintenance.
Lindner also introduced its new Micromat HP single-shaft shredder series featuring a gearless direct belt drive for high throughput processing of post-consumer and post-commercial plastics. The new series, offered in Micromat HP 1500 and 2000 models optionally features an automatic belt tensioning system which guarantees an optimal operating point for energy efficiency, as well as an adjustable safety clutch that protects the unit against
42 PLASTICS RECYCLING WORLD | May/June 2023
www.plasticsrecyclingworld.com
non-shreddables. A fully screwable knife system combined with the robust belt drive can deliver over 1,500 cuts per minute, increasing throughput up to 6 tonnes/hr of 30-50 mm grain size. The Micromat HP was part of Lindner’s product showcase at the VDMA Circular Economy Forum at K2022, where it was used in combination with Lindner Washtech’s Twister-type friction washer and mechanical Loop Dryer to demonstrate the integrated process of shredding, washing, and drying, with integrated water treatment, as it processed post-consumer rigid plastics. Addition- ally Lindner showcased the processing of post- consumer pallets made of a polyolefins-mix shredded in a single step to a uniform particle size of 8 mm and residual moisture of less than 1% for direct processing in a two-stage injection moulding press. According to Lindner, until now, injection moulders have mainly purchased granulate for their operations but now have the option to purchase and process clean plastic flakes with a specific particle size and low residual moisture content, if the parameters fit. Lindner moved its headquarters to a new 6,000 office and 14,000 m2
m2 production site in Spittal/
Drau, Austria last July. The production area at the new plant is double in size to the previous location to handle increased capabilities, with automation and robotics facilitating heavy physical work, such as mounting machines. The move allows for enhanced quality assurance and process optimisation in assembly and extends the company’s manufacturing capabilities. The complex is designed with environ- mentally friendly building materials and a photovol- taic system that supplies the company with electric- ity from renewable resources. Laminated timber from the region, a renewable raw material, is used in the construction of the hall, while special recycled plastic turf bricks are used for the paving in the
IMAGE: LINDNER
IMAGE: LINDNER
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