AACHEN and DUISBURG, Germany, May 8, 2013 (Press Release) -Norske Skog, a global manufacturer of Ultra-Light Weight Coated (ULWC) papers, has successfully improved its production capabilities by adding optical Web Inspection Systems (WIS) from ISRA VISION, the technology leader, resulting in fewer web breaks, reduced customer complaints and higher production throughput.
At its location in Duisburg-Walsum, Norske Skog produces around 430,000 tons of high-quality gloss and matte material using ULWC-paper by way of two paper and coating machines. The products is used primarily for magazines and advertising supplements. As early as 2001 Norske Skog installed its first WIS complete with an unwind control system on the winder at the infeed of the coating machine and at PM4. Because of the exceptional experience with this system and many years of collaboration between Norske Skog and ISRA VISION, the decision was made in 2010 to take steps to introduce additional inspection systems. Step by step, additional WIS were installed at the PM10, the SM10 and, most recently, at the SM4.
With the latest web inspection and automatic unwind control systems, the paper manufacturer in Duisburg, Germany belonging to Norske Skog, a paper group that operates on a worldwide scale, is able to detect even the smallest of defects during early stages of production with the help of ISRA VISION's WIS providing 100% inspection of the produced paper.
The particular challenge for the WIS installed on the paper machines is not the ability to reliably identify typical defect types such as holes and dirt specks, but the ability to differentiate between the different grades of material depletion in the ULWC paper.
Among the major benefits of the WIS are excellent image quality, second to none classification features and user-friendly operation. During the process, defects are not only differentiated based on appearance, but are categorized by cause assisting the operator in the ability to detect defects in due time, evaluate them immediately and make the correct decision quickly. By making fast decisions, the cause of defects can be remedied immediately reducing the amount of scrap produced.
ISRA VISION inspection systems significantly reduce the number of web breaks at the coating machine. Thus, Norske Skog Walsum's decision to employ the WIS was definitely worthwhile. Production throughput increased and the production processes were optimized. The number of customer complaints declined dramatically.
Decades' worth of expertise has given the experts at ISRA VISION an excellent understanding of the processes that take place in paper manufacturing. Customers can maximize overall production by working hand-in-hand with the operators to monitor the production ensuring defect free material.