GRANULATORS | SIZE REDUCTION


other granulator product lines at Fakuma. The JS granulators use screenless technology, and are an upgrade from the established SMGL range of screenless granulators. On show at Fakuma was the JS 2811 model. The JS Series is designed for inline granulation


of runners from injection moulding. The machines can handle engineering plastics, including rein- forced materials, to produce uniform regrind. Tria says granulation of plastics filled with glass fibre is possible due to the anti-wear treatment of the rotor and cutting chamber. At Fakuma, Tria also showed models from its JM Series for injection moulders, specifically the JM 2115 and JM 4215 models. The company devel- oped the JM Series with particular attention paid to noise level reduction. The JM rotor has a new design which Tria says “guarantees an adequate noise level in [the] injection moulding unit, in terms of absolute value and, above all, in correspond- ence of those frequencies that most disturb the human ear”. This was achieved from the company’s collaboration with an acoustic university laboratory, where a series of tests were performed in a semi-anechoic chamber. An optional kit for additional soundproofing is also available, dedi- cated to production areas in which electric injec- tion moulding machines are running, as these operate with less noise than hydraulic machines. Hellweg Maschinenbau has a variety of


granulator sizes, from beside-the-machine units to big units for large scrap and post-industrial waste pieces. The company recently extended its large-scale 600 series granulator at the upper end, by adding a model with a 1,500 mm working width. The new MDS 1500/600 version offers high torque due to the high stability of the entire machine housing and the heavy-duty rotor, which is made from a single block of metal and weighs 3,000 kg. “Aside from the high perfor-


mance, the machine has other strengths – such as in flexibility on account of its modular design,” said Mark Hellweg, managing director. “For example, straight or slanted housing versions are available, as well as different rotor and stator designs, in order to address the different tasks required in the market.” The double-slanted scissor


www.plasticsrecyclingworld.com


type of cutting ensures that the large granulator can shred articles including thick-walled mould- ings, sheets, pipes and profiles. In continuous operation, maximum heating of material during grinding is no more than 33°C – and a maximum of 38°C when shredding glass fibre reinforced plastics. This removes the possibility of thermal degradation. Granulators in the 600 series offer the possibility


of full scalability. Despite difficult material tasks, the regrind produced can be easily processed further. The latest granulator can be adapted according to predetermined conditions. Depending on the material to be granulated – and the size of the screen block used – throughput reaches 800-2,500 kg/h. Drives with nominal installed power ratings between 75 and 110 kW help to ensure this. The high performance is accompanied by high energy efficiency and gentle material treatment, says Hellweg. Peak loads are mechanically compensated very effectively – thanks to the high rotor weight, and the arrangement of the blades according to a high-shear cutting principle. The 600 mm rotor works at a


speed of around 400 rpm, and has a working width of 1,500 mm. A choice of rotors is offered, with three to seven continuous rotor cutting strips. The usual process of setting rotor blades has been eliminated. US granulator manufactur- ers showcased new technology


at NPE 2018 in Orlando, Florida in May. Cumberland exhibited the T50 Series granulators which, it says, offer strong,


November/December 2018 | PLASTICS RECYCLING WORLD 31


Above: Tria’s JM 15 series of granulators were tested in an acoustic laboratory during


development


Left: Hellweg’s MDS 1500/600 has a working width of 1,500 mm


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36