DIENES develops 4-fold simultaneous core cutter for three different core diameters
DIENES is the worldwide leading manufacturer and turnkey provider of industrial slitting tools as well as solution-oriented slitting systems, which live up to nationally and internationally expectations. One of the most recent innovations from DIENES in the area of slitting systems is a 4-fold simultaneous core cutter, which was developed for the processing of cores in the hygiene industry. Based on its outstanding flexibility and capacity the system can also be used for the manufacturing of cores in other industries, e. g. paper, film or foil.
Individual targets require individual developments
The development of the 4-fold simultaneous core cutter was carried out on customer specific order to cut cardboard cores with three different diameters - in this case 75, 150 and 170 mm - as well as a minimum core width of 5 mm (at an initial state of the core unit of 3.800 mm width). The core cutting unit was to be integrated in an existing slitter-rewinder and replaced the previous core cutter - which only had one slitting unit - because this unit slowed down the whole process. A retrofit of this unit therefore was economical sensible to achieve a higher slitting speed as well as an improved cutting quality.
The DIENES in-house development team met the high customer demands and developed a 4-fold simultaneous core cutter with four efficient cutting units, each consisting of a core cutting knife holder and a corresponding linear adapter. The four slitting units contribute significantly to the increased speed for the core cutting process. Especially in comparison to the slitting unit (1) used previously. In addition the slitting units - each equipped with a motor - are simultaneously and independently adjustable. The complete control of the system is done via a user friendly and safe touch panel outside the slitting area. The required information for the cutting, such as number and width of the cores, receives the system directly from the control panel of the slitting system, which is cutting the material to be rewound. It transfers the slid width to the core cutter, which calculates the "slitting recipe" subsequently, meaning the corresponding core width and if necessary the spacers between the actual cores. These spacers grant a fault-free winding of the material in the following process. Additionally, the system provides a positioning accuracy of +/- 0,15 mm.
Furthermore the slitting pressure applied to the knife holder can be adjusted with the control panel. It is possible to work with two different pressures during the slitting process. The lower pressure is used to generate a groove in the material. The higher pressure completes the cut. Thus the cutting of a spiral is avoided - especially with thick material. If requested it is possible to block and park individual slitting units within the system. The chosen slitting recipe will then be carried out only by the active units.
Thought out down to the smallest detail
The integrated linear adapter has two basic functions: first, the mounting of the knife holder and second, its movement to the desired position in the system. In addition this adapter impresses with its electrically movable vertical stroke (approx. 120 mm), which allows the quick vertical adjustment to different core diameters. In this case these diameters were 75, 150 and 170 mm. But the system is also realizable with other individual requirements concerning the core diameters.
The used knife holder type DS 8 in core cutting design belongs to the most recent knife holder generation developed by DIENES and is also well thought out and innovative. Beside its stability and corrosion resistance the DS 8 impresses with a wide range of safety features, such as our 360° hand guard as well as a locking pin and bayonet knife fixing. This makes the knife exchange safer and easier for the machine operator without increasing the setup time. After the basic adjustment the exact electrical setting of the immersion depth results in a lower knife wear. If regrinding is required the immersion depth can easily be readjusted via the control panel. Furthermore the knife holder has two separate vertical stroke compressed air connections. The first connection is responsible for the downward movement of the knife holder into the material, the second one for actively releasing the knife holder from the material.
Benefits of our 4-fold simultaneous core cutter at a glance
Speed of the core cutting
Four times higher speed as the previous solutions and therefore a more economical production
Flexibility with three different core diameters and small / varying slit widths
Improved cutting quality
User friendly operation with secure touch-panel
Higher service-life due to less knife wear
Dienes Werke für Maschinenteile GmbH & Co.KG
In 1913 the company was established by Karl Rudolf Dienes in Remscheid, Germany, and can now look back on more than 100 successful years, several international locations as well as numerous pioneering innovations and patents. Today, the owner-managed traditional company has its company headquarters in Overath near Cologne in Germany and provides more than ever integrated and innovative solutions in the fields of knives, knife holders, slitting systems and valves.