TECHNOLOGY | SHREDDERS
Above: The Vecoplan Heavy Duty machine stand is fitted with additional gusset plates and reinforced side walls
company says. In the machine stand, the base plate and the side walls have been reinforced. The machine base has been raised and the base plate angled in order to minimise the impact force of the input material. In the rotor area and screen chamber, the distance between the rotor face and side wall has been increased. This prevents strips and wires wrapping themselves around the rotor shaft. The free passage of material downwards also
reduces the wear between rotor and side wall. A reworked matching of drive shaft and rotor bearing as well as low-wearing, replaceable sealing elements on the rotor and side wall, prevent materials penetrating and setting in the area of the bearing. These features increase service life and improve maintenance. Depending on the requirement, Vecoplan fits a
111, 134 or 155 kW HiTorc drive for the rotors. The drive comes without mechanical elements such as gearbox, belts, couplings or hydraulic power packs. In contrast to machines with gearbox drive, the extreme shaking and vibration which occur with difficult shredding operations does not present a major challenge for the HiTorc direct drive, says Vecoplan. UK-based plastics recycler Indigo Environmen-
Right: The robust screen of Vecoplan’s VHD 1600 T can be easily changed for different output particle sizes
tal has invested in a new Untha RS40 shredder to boost its processing capabilities. Handling 4 t of material per day, the four-shaft machine with ram-assisted hopper is transforming bulky and oversize plastics – including 240 litre wheelie bins, 205 litre HDPE drums and LDPE buckets – into a particle size of less than 50 mm. The fraction is then granulated down to less than 12 mm and washed before being resold into the international market. Indigo recycles plastics from the automotive, process, manufacturing, waste management, food and beverage industries, as well as various local authorities.
40 PLASTICS RECYCLING WORLD | May/June 2018
www.plasticsrecyclingworld.com
Above: Start-up lumps require heavy-duty granulators that can handle a variety of weights and sizes
Untha has also recently invested in a new
shredder test centre in the UK, which includes a number of the company’s 16-strong shredder range. Ceiling-mounted and on-machine cameras have been installed so that visitors can see the shredding process in detail. Hellweg Maschinenbau has developed the high performance granulator MDSG 1000/600 BR, which works on the peeling-cutting principle and has been constructed for single-stage shredding and granulation of solid start-up blocks, and pipes and sheets. The company says that the machine has been designed as a robust welded construc- tion and is fitted with a solid peeling cutting action rotor. It is able to process, in a single stage, heavy start-up lumps as well as pipes and sheets in wall thicknesses of, for example, 500 mm into granulate characterised by its homogeneity and lack of dust. The geometry of the blades used enables the peeling-cut method combined with limitation of cutting depth. This prevents the rotor blades from cutting too deep into the plastic material to be granulated. Material is “peeled off” from lumps, as this prevents rotor blockage and guarantees fast, quiet and energy-saving shredding and granulation. With a 1,000 mm working width, the 12-blade U-Cut rotor has 600 mm diameter and it can be
PHOTO: VECOPLAN
PHOTO: VECOPLAN
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