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Along the pretreatment line of a hot dip galvanizing plant, conditions are difficult: workpieces have to first be cleaned in diluted hydrochloric acid to ensure that they are as clean as possible. As a result, the hydrogen chloride content of the air along the pretreatment line is around 2 percent. This means that the indoor crane and the components on to it are subjected to exceptional acid exposure. Plastic energy chain systems have been proving their worth in the energy supply to the process cranes at Wiegel for several years. They move in plastic troughs made of the chemically resistant material igumid® EG+, which enables the system to easily cope with the aggressive conditions.
So far it has become clear that the energy chains from igus are working well and reliably at Wiegel. "The experience gained since 2015 shows that the use of an acid-resistant energy chain in the area of the pretreatment line for energy and signal transmission was the right decision", concludes Ronny Horn, Project Manager at Meissner Krane. "In all factories, the systems have been running trouble-free since their commissioning." And Peter Zorn from Wiegel adds: "The plastic trough was very important to us. Neither 304 nor 316 stainless steel would have withstood these environmental conditions. Equally important to us was the fact that the wall around the pretreatment line can now be completely closed and we also have much less maintenance with the new system." These requirements have so far been fully met. Energy chain systems from igus will also be installed at the next Wiegel plants that will be retrofitting Meissner cranes.
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