RECYCLING | TECHNOLOGY
granulator. This ability greatly reduces downtime when replacing knives and helps to ensure a more consistent cutting circle. For processing highly abrasive materials, SMS Series granulators can be equipped with an optional wear protection pack- age. Common wear areas can be fitted with ex- changeable wear parts. The two-piece split design allows for optimum access to all components simplifying cleaning and routine maintenance. 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, 500mm into granulate characterised by its homogeneity and lack of dust. The geometry of the blades used enables a
cutting principle known as the ‘peeling cut’, 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 1,000mm working width, the 12-blade U-Cut rotor has 600mm diameter and it can be sharpened a number of times by regrinding. The rotor is produced from a single solid piece of steel and weighs approximately 4,000 kg. The overall weight of the machine amounts to around 11,000 kg. Depending on the material to be granulated, achievable throughput ranges amount to between 800 and 3,000 kg/h, allowing for 5-20mm diameter sieve perforation and 75-90 kW installed power rating. Complete noise protection cabins as well as feeding equipment for sheets and pipes are available as options. Rapid Granulator has devel- oped the Raptor Series of shredders for plastics. The modularly designed units feature an ‘open-hearted’ design, with other notable design features including the cutting system, tilt-back hopper, and design for integrated granulation. “The Raptor Series is a shredder and granulator
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hybrid with the shredder’s heavy-duty cutting technology combined with granulator features such as Rapid’s ‘open hearted’ design that makes it super-easy to operate, service and clean,” says Rapid Global Sales and Marketing Director, Bengt Rimark. “The Raptor Series has been developed with 100% focus on every single detail that is of importance for plastic proces- sors, in order to create simplicity and a minimum cost of owner- ship. As we develop and manufacture both granulators and shredders, we make sure that the machines are tailored for each other and that we can provide complete recycling systems, direct from Rapid.” The ‘open hearted’ design of the Raptor enables quick and direct access to the shredder rotor and cutter chamber, simplifying the cleaning and service process. The front door, hinged on the side, provides unrestricted access to the rotor and to the screen, which is mounted in the door. Once the front door is open, the shredder hopper mounted on a rear hinge can be tilted back. Rapid offers 36 base configurations of the Raptor in order to handle various applications. The modular systems feature two diameters and two widths (31.5 and 53 inches/800mm and 1,350mm). There are two system designs for pushing material into the rotor called FlexiPush and PowerPush. The Power- Push is available with an extended pusher length (PowerPush-XT); there are also three different cutting systems: Quad Cut, Claw, and Power Wedge. The company says that the low cost
of ownership of the new Raptor Series is possible through the ease and speed with which it can be cleaned and maintained. The machine can be in a completely open position in less than one minute after it has stopped running. Once the machine is open, all fasteners are accessi- ble from the outside using air driven tools. The access makes any contamination immediately visible. The FlexiPush is a pneu-
matically driven pusher and is intended for handling basic applica- tions, including lumpy materials. It can handle large products such as a 1,200 l IBCs, for example.
Above: Herbold’s SMS 100/160-9-2 SB3 features a rotor that is 20% larger than current offerings
Left: The MDSG 1000/600 BR lump granulator from Hellweg Maschinenbau
� July/August 2018 | INJECTION WORLD 57
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