Bulletin 1/2011 - Siempelkamp

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Cutter head SieMpelkaMp | MACHInERy AnD PLAntS the two-phase process, drum chipper and knife-ring flaker, is also used in current projects by Hombak to accommodate increasingly changing wood types and bent wood. “With little design effort, however, we would also be able to reduce bent wood with a cutterhead,” says Werner Schweinsberg. the advantages of the Hombak cutterhead are evident: Due to the fact that the knives are pulled through the wood there is a much better flake quality being generated in comparison to the regular chipping. With such a knife it is possible to cut perpendicular as well as parallel to the fibers’ direction.this technology pays off due to its low energy demand which, next to quality and production speed, is an argument that may convince plant operators most.
SieMpelkaMp | MACHInERy AnD PLAntS Just the mere centrifugal force will hold the knife in place, i.e., the knife is clamped and not – as usual – screwed onto the knife holder. this represents two more advantages: less wear on parts and quicker knife replacements. With so many benefits it is not amazing that the cutterhead has always received the recognition of the market that is necessary for such long-term success. the application fields of the cutterhead are not limited to the wood-based materials industry, as Hombak has known for a long time. the traditional concept is well on its way to set new benchmarks as an innovative product. In the 21st century the Bad Kreuznach company will put a large part of its development work into finding ways to use the special advantages of the innovative cutterhead in other application fields, for example, in paper and plastic reduction. Basic tests with the perpendicular cut show that this effective chipping technology represents a clear advantage especially when cutting young materials, such as carbon fiber reinforced polymers. Among others, the aircraft industry benefits here (source: a Master thesis on the WWW). “Our research and development currently concentrates on developing modified cutterhead concepts. In this respect, one cutterhead will always follow behind the next one!” says Werner Schweinsberg. In order to achieve the objectives, Hombak not only focuses on research and development but also on the expansion of its equipment and process efficiency. A new boring machine allows the machining of larger parts with a component weight of up to three tons. Furthermore, the material flow is being optimized; production processes are becoming increasingly more efficient. For the representation of business processes and for the continuous integration into the <strong>Siempelkamp</strong> Group, Hombak is investing in a connection to the ERP system used by the Group. this also opens up the advantage of communicating with the other <strong>Siempelkamp</strong> team players in a more intensive and effective manner! Cutter head in extended position Drum screen Drum chipper during assembly 74 75
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