Supplier: Voith Paper
Description: Last June the BM 7 was successfully commissioned at the BillerudKorsnäs production facility in Gruvön, Sweden. The Voith XcelLine board machine has been equipped with a pioneering technological setup that sets new performance benchmarks for production lines for four different board grades. At a design speed of 1,200 m/min and web width of 8,800 mm, the capacity of the BM 7 is 550,000 metric tons per year.
Details: Some of the standout features of the former section include a three-ply wire section with a DuoFormer D II hybrid former, two state-of-the-art DuoShake shakers and a fiber orientation control system. The scope of supply also includes various MasterJet Pro F systems with additional IntraDamp modules for the headbox. In the press section, a Tandem NipcoFlex shoe press with SolarPress roll covers ensures optimum dewatering.
In the dryer section, EvoDry steel cylinders are being used in a board machine for the first time. The special cylinders allow highly efficient and safe paper drying thanks to higher heat transfer and greater working width. Another first at a European paper mill is the high performance winder VariFlex XL.
In the finishing section, the BM 7 is also the first board machine worldwide to be fitted with Curl Control. For maximum flexibility and optimum product quality, the machine also has four different coating units: two SpeedSizer systems, one JetFlow F and one DynaCoat AT. Both the SpeedSizer units and the DynaCoat AT have carbon fiber supporting structures to ensure stable CD profiles with consistent coating performance.
Start-up: Start-up took just seven days from stock on wire to paper on reel.