![]() ![]() JTI was looking for a new partner for this key function in the course of general modernisation and expansion of the plant, which is located in three central stations at the Trier plant. “And we need vacuum in large quantities,” emphasises Arnhelm Köster. The short insight into the principle of modern cigarette production makes the importance of vacuum generation clear. They act as a seal between zones of different pressure. In the interior of the cylinders are certain vacuum levels. The negative pressure acts through small holes in the bulges in which the cigarettes are located. These processes can be compared to a fast-rotating carousel system of cylindrical product carriers that synchronously transfer the cigarettes from one station to the next. Vacuum is also necessary to connect the cigarette sections to their filters in a continuous process. The paper is glued at the longitudinal seam and the finished cigarette rod is cut to length a little later. With a pressure corresponding to about one third of the atmospheric pressure usually prevailing, the cigarette paper is sucked from the roll outside to a contour so that it can lie around the round-shaped endless tobacco rolls. Mechanical solutions would inevitably result in deformations, marks and damage to the sensitive cigarettes,” explains Arnhelm Köster. “At about 20,000 units per minute, centrifugal forces occur, which we have to counteract by holding them. The high speed makes it impossible to implement hold and transfer functions. In order to appreciate the importance of the highly available and precisely set vacuum of around 340 millibars, it is worth taking a look at the processes of a cigarette machine. ![]()
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