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Pulp Paper & Logistics

Quality systems upgraded on Stora Enso’s food packaging board line

BM4 board machine, Stora Enso Imatra Mills has installed an upgraded web inspection and web monitoring system supplied by Procemex. Increasingly strict quality


requirements on consumer packaging board used in contact with food and liquids mean that no flavours leach into products, and the board must be first-rate in terms of visual cleanliness. Procemex systems have been used for many years on Stora Enso’s BM4 machine at Imatra to indicate defects in board quality and to reduce web breaks Riku Suurnäkki, production manager of the BM4 line (pictured below), says: “We compared three different suppliers and ended up with Procemex, first of all, because we have had positive experiences with the previous system and, secondly, because we were able to upgrade the previous system – without needing to acquire a completely new one. We also investigated what benefits we

o improve the quality of its food packaging board and increase the efficiency of its

can gain from the upgrade. In the end, the decision was an easy one; after all, we obtained a wholly new system by simply upgrading the old one.” “Both web break and web inspection/defect detection systems are critical elements in order to be able to operate these machines: web inspection in terms of the final cleanliness and the web break system in terms of production efficiency. If we encounter any problems with efficiency, the web break system allows us to identify the root cause of breaks, enabling us to resolve, or even eliminate, the problems.” “Stora Enso Imatra Mills

defined new locations for cameras, together with machine operators, and, now, cameras indicate the locations where

November/December 2016

pulp starts to pile up. “The new system became a necessity after we identified that we need to improve the classification of defects and the usability of the system. The previous system was unable to reliably classify a certain common defect, and there were situations in which defects in board ended up in our plastic coating.” The new upgraded Procemex

cameras have a significantly higher resolution, defects are now classified more closely, the detection of defects is now more visual and the system is easier to configure for each user. “We can better detect any dirt and impurities,” says Vesa Koskinen, system specialist at Efora, who is responsible for the maintenance of the BM4 system.

“The new system improved

overall reliability. We acquired new PCs and upgraded our cameras. Shifting to the new system was a simple process. These Procemex Pinhole cameras are excellent, and they practically require no cleaning. The Pinhole cameras are in challenging locations, where pulp keeps flying every which way, but they are easy to keep clean. The new Procemex cameras offer an HD quality, the images they produce are on a whole different level, and lighting has been improved by using new Procemex LEDs. These new lights are much easier to control than the old ones.” “It is easy to call Procemex whenever we need help, and it quickly responds to our questions,” says Koskinen.

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