"Large quantities of fine dust and chips are produced during the processing of components, e.g. made of wood or fibre-reinforced plastics. These represent a high health hazard for employees (respirable, carcinogenic) and can also cause the machines to fail.
Up to now, high-performance extraction systems have been used to dispose of production waste. These systems collect dust and chips, filter them out and collect them for disposal. However, these systems have a very low degree of collection for certain processing machines. The extraction system must often be installed at too great a distance from the actual point of origin in order to avoid a collision with, for example, the milling unit. This leads to considerable deposits on the components, which have to be cleaned manually with great effort after machining. The risk of inhaling fine dust is very high. In addition, with certain materials the filtered, warm air cannot be led back into the hall. This results in high heating costs. Another disadvantage of these systems is the fine dust still contained in the filtered air. This is several grams per day per processing machine, even with Hepa fine dust filters with a separation efficiency of 99.95 %. "
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(Source: VDI Fachmedien & Co. KG, 16.08.2019, https://www.gefahrstoffe.de)