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Difficult conditions prevail in the pre-treatment line of a hot-dip galvanising plant: To ensure that the workpieces are as clean as possible, they must first be cleaned in diluted hydrochloric acid, among other things. As a result, the proportion of hydrogen chloride in the air of the pre-treatment line is around 2 per cent. This means an extraordinary acid load, especially for the indoor cranes and the associated components. For several years now, plastic energy chain systems have been proving their worth at Wiegel for supplying energy to the process cranes. These run in plastic troughs made of the chemical-resistant material igumid® EG+, which means that the system can cope with the aggressive conditions without any problems.
So far, the energy chain from igus® has proven to work well and reliably at Wiegel. "The experience gained since 2015 shows that the use of an acid-resistant energy chain in the pre-treatment line for energy and signal transmission was the right decision," concludes Ronny Horn, project manager at Meissner Krane. "The systems have been running smoothly in all plants since commissioning." And Peter Zorn from Wiegel adds: "The plastic trough was very important to us. Neither stainless steel in 304 SS nor 316 stainless steel would have withstood these environmental conditions. It was equally important to us that the wall to the pre-treatment line can now be completely closed and that we also have much less maintenance with the new system." These requirements have been fully met so far. Energy chain systems from igus® will therefore also be used in the next Wiegel plants that Meissner Cranes will retrofit.
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