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Slit ng


itting&Rewinding


Aclassic am ong slitt er rewin ders : The s ngle shaft centre-drivenwinding concept


The single shaft centri High flexibility, reliability,


y,


variouswinding conceptsmake it dificult. Onemachine concept to comes to convertingmater


F


ials such as paper, consider when it


board, film, aseptic packagingmaterials and aluminiumfoil is the single shaft centre-driven winding concept. Thismachine category is relatively simple, yet it offersmany advantages when designed andmanufactured proper y.ly. For web widths between one and 2.5metres, a singl e shaft can be the best solution. In practice, winding delicatematerials on driven cores has proven effective. The transmitted force into the cores, generated fromthe drive, creates the necessary web tension. Depending on the requiredmaterial tension and the actual diameter of the finished rolls, a specified torque needs to be set in order to ensure the right web tension at the winding point.With the centre-driven winding concept, the pressing force is applied from separate contact rollers fromthe outside. The single shaft centre- driven windin g


fo


concept and slitting and winding quality allows slitter rewinders to handle the web with such delicacy that even pressure sensitivematerials with a very delicate surface can be wound without any risk of damage. Thismachine concept is therefore the ideal solution for these applications. A waste-free, smooth production process is guaranteed when the slitter rewinder is equipped with a proper reel unloading system.


The TOPSLIT converting solution


inding the right slitter rewinder for specific requirements is not always simple.Differentmachineswith


y, operator friendliness, sustainability,


driven winding concept y,


productivity aswell as cost effectiveness... This iswhat producers and converters in various industries are looking for in their slitting a ndwinding solutions, saysGOEBEL IMS


THE SINGLE SHAF CENTRE


THE SINGLE SHAFT CENTRE-DR VE N WINDING CONCEP AND EFFICIENCY


RIVENI WINDING CONCEPT AND EFFICIENCY


The loading and unloading of cores and finished rolls is a determining factor for the eficiency of the whole converting process.With the single shaft centre-driven winding concept, the cores for the finished rolls can be placed onto the winding shafts in just a few seconds. The cores do not need precisemeasuring to be correctly positioned; it is suficient to fit themonto the shaft one beside the other.


r. A final adjustment


can easily bemade based on the actual positions of the webs.


The process of unloading the finished rolls is simple and fast with the single shaft centre- driven winding concept. One option is to unload the rolls to the floor and extract the shaft with an extractor. Another solution is to keep the shaft overhanging at one end and pulling out the pack of rolls after depositing them onto a side-moving trolley


y.. With single shaft centre-driven slitter


rewinders, even the changing of slit sizes is easy. The reason being that only the position of th e knives needs changing while there is no need to adapt the winding section. Once the shaft is dressed with the cores of the new size to be slit, the job is done. Fo


For those requiring an even


higher productivity, themachines can be equipped with an automatic knives positionin system, as the cost of this type of equipment decreased in the last few years, while their eficiency and reliability increased significantly.


has g


y. GOEBEL IMS’s’s RAPIDD1 is ideal fo RA for thin and delicate


THE SINGLE SHAF CENTRE-DR VEN WINDING CONCEPT AND COS


WINDING CONCEP AND COSTS


Machines with the single shaft centre-driven winding concept are very compact,making them more economical than other slitting and winding solutions. Since they do not need thatmuch precious floor space in the factory, ootprint of these slitter rewi as the single shaft centre-dri are comparatively simple, th muchmaintenance. Overall, offers good value for themoney.y.


ffo fo


CHOOSING THE RIGHT SOL TION AND THE RIGHTMANUFACTURER


CHOOSING THE RIGHT SOLUTION AND THE RIGHT MANUF CTURER


The single shaft centre-driven slitter rewinders are notmachines that everybody canmanufacture; their seemingly simple structure hides the necessity of a specific designing experience and a very accurate construction. Especially with this machine type, the eficiency and ability to produce high quality rolls depends completely upon the perfectmanufacturing. This includes the outlining of the proper web path and web tension, the right position of the slitting unit in well as the right ng rollers. Even a


layout of knives and spreadi front of the winding unit, as


smallmistake in the design, or a slightly poor construction, can turn an eficient and productive single shaft centre-driven slitter rewinder into a nightmare for the end user. The results include overlapping webs, inconsistent web tension, increasing waste and a poor slitting quality. y, it is not suficient anymore to only


y. Today, To


have reliable, sturdy and operator-friendly machines; theymust also be totally safe. This is whymore andmore attenti fulfilment of the EU safety s


among the strictest safety rules in the world. However, they are still not well known bymany users and even, unfortunately, by quite a fe w machinemanufacturers.


y,


Besides the essential safety issue, the single shaft centre-driven slitter rewinder should also be environment-friendly. Solutions to realise energy savings and the reuse of energy in the working process of themachine can be decisive with regards to operating eficiency. Among these solutions are highly eficient AC drive


y. y. 24 December/January 2017 www.convertermag.co.u k


tandards. These are on is given to the


nders is smaller. Also, y, themonetary


this type ofmachine ey do not require as ven slitter rewinders


papers and the handling of veryry narrowslits THE SINGLE SHAFT CENTRE


RIVENI


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