Demag cranes for the world leader PM2 Propapier Efficient throughput in large format Top quality and high-speed handling Since March 2010, the PM2 in Eisenhüttenstadt, Germany, has been producing corrugated base paper that has a width of 10.2 m and is the highest-performing paper machine in the world. Testliner and Wellenstoff weighing between 70 and 130 g/m2 are produced on the basis of fully recycled paper. The prime objective is for the installation to reach maximum performance as quickly as possible. The reels will then be filled with 1,800 m of base paper every minute. High performance at world-class level Only eight months after it was first put into operation, the PM2 achieved a world record for the production of paper with a weight of 90 g/m² in continuous 24-hour operation. In April 2011, the factory set another world record: Wellenstoff paper weighing 80 g/m² continuously ran off the machine at a speed of 1,650 m/min for 30 hours. Cranes for efficient logistics The high production output requires reliable flow of material, which demands smooth logistics and efficient handling up to and including the shipping operation. To satisfy these requirements, Demag Cranes & Components supplied the entire crane equipment for the paper factory and the paper roll store and networked the production and logistics operations with a warehouse management system. Demag cranes play a leading role wherever parts of the installation have to be safely transported, reels have to be picked up in cycles to match the paper machine operating cycle and rolls of paper have to be carefully stored. PM2 Propapier Demag cranes in operation from the start Three Demag process cranes were already used for the safe, reliable and fast transport of loads when the paper machine was assembled. Thanks to the cranes, which are equipped with up to five hoist units, the various parts of the installation were precisely and reliably positioned for assembly of the PM2 machine. Reliable handling above the paper machine Hoist units with load capacities of 130/65/65 t are available for duty at the wet end of the machine. This arrangement allows the rollers and all elements of the machine to be precisely lifted and transported for maintenance and repair purposes. In normal daily operation, quality only pays off at the corresponding speed. In time with the machine operating cycle, the crane installation above the dry end of the PM2 ensures that empty reels are swiftly returned from the rewinder to the reel store. Master/slave mode provides for absolute synchronised operation of the two 130 and 90 t hoist units – and, therefore, for a high level of safety and reliability. Rotating spreader for heavy loads If required, this crane can also temporarily retrieve the full reels. To do this, it employs a rotating spreader which is used to lift the full reels, which weigh up to 160 t, and deposit them parallel to the paper machine. Integrated flexibility Additional flexibility of these three crane installations is provided by two further hoist units, which enable all maintenance and repair work to be carried out. Two DR-Pro rope hoists travel along the crane girders of each crane in the form of cantilever crabs. Thanks to their compact design and fast lifting speeds, they are used for installing and removing machine parts that weigh up to 10 tonnes. Paper-roll shipping store Efficiently stored – retrieved on time The entire annual production of 650,000 t is transported to the paper-roll shipping store by conveying systems. Here, three fully automated process cranes that are equipped with vacuum lifting devices are responsible for gently storing the unpacked rolls of paper, which weigh up to 5,300 kg. The cranes stack the rolls up to a height of 17.5 m in two bays. In each bay, two variable-sized blocks have been created for storing reels with diameters of between 1,400 and 1,600 mm. At a theoretical fill capacity of 80%, the store can accommodate 42,000 t of paper. Optimum utilisation of the available space by storing rolls in a honeycomb grid with vertical load pick-up High safety standards thanks to automated operating sequences Careful handling of the rolls Efficient utilisation of the entire roll Rapid access for just-in-time staging No operating costs for forklifts in the store Reduced personnel costs Fast return on investment Technical data Cranes for paper production and storage Operating location Crane type*) Open winches Rope hoists Span Load capacity [kg] [mm] PM2 paper machine Wet end ZKKW 130 65 65 10 10 Dry end ZKKW 130 90 10 10 Production processes Core handling ZKKE 5 5 13,100 Mechanical workshop EKKE 12.5 19,200 Stock preparation ZKKW 40 40 10 10 34,000 Installation crane ZKKE 16 13,100 Basement crane ZKKE 16 13,100 Vacuum system maintenance ZKKE 16 8,070 Flocking agent maintenance ZKKE 3.2 8,070 Ultrafiltration maintenance ZKKE 10 8,400 Automated paper-roll shipping store 3 automatic cranes ZKKW 5.3 28,500 *) ZKKW: Process crane with winch units ZKKE: Double-girder standard overhead travelling crane EKKE: Single-girder standard overhead travelling crane Downloads Image gallery PM2 Propapier PM2 Propapier PM2 Propapier More PM2 Propapier Image gallery PM2 Propapier Cranes above the dry end for handling full reels with a powered rotating spreader PM2 Propapier Crane 3 above the paper machine for service and maintenance work PM2 Propapier Load handling on two operating levels: Demag process crane in the stock preparation bay PM2 Propapier Three process cranes on one runway: Crane 3 fitted with four hoist units above the stock preparation bay PM2 Propapier Overhead travelling crane with two hoist units for handling bundles of paper cores PM2 Roll-shipping store The rolls are safely stacked up to a height of 17.5 m PM2 Roll-shipping store Gentle transport and storage: Demag crane system fitted with vacuum equipment PM2 Roll-shipping store Gentle transport and storage: Demag crane system fitted with vacuum equipment PM2 Roll-shipping store Three automated process cranes for storing the annual production of 650,000 t Related products Process cranes for the paper industry Crane systems for manufacturing paper and automated storage of rolls KBK overhung and extending cranes Large overhang – constant or variable DR-Pro rope hoists Efficiency thanks to high handling rates
PM2 Propapier Load handling on two operating levels: Demag process crane in the stock preparation bay
PM2 Propapier Three process cranes on one runway: Crane 3 fitted with four hoist units above the stock preparation bay
PM2 Roll-shipping store Gentle transport and storage: Demag crane system fitted with vacuum equipment
PM2 Roll-shipping store Gentle transport and storage: Demag crane system fitted with vacuum equipment
PM2 Roll-shipping store Three automated process cranes for storing the annual production of 650,000 t
Process cranes for the paper industry Crane systems for manufacturing paper and automated storage of rolls