TECHNICAL DATA Central drum diameter: 1849,4 mm - chromed No. of decks: 8 Printing structure thickness: 100 mm Useful printing width: mm 800, 1000, 1200, 1400 Web width: mm 920, 1120, 1320, 1520 Print repeat: min. 300 mm (12”) max 800 mm (31 1/2”) Longitudinal register: 360° automatic, continuous Horizontal register range: ± 7 mm Mechanical speed: 300 m/min (984 f/min) Gear pitch: infinite (gearless) Winding reel diameter: 800 mm (31 1/2”) Unwinding reel diameter: 800 mm (31 1/2”) Film tension: 0.15- 0.55 PLI (0,25 – 1 N/cm) Central drum TIR: 0,010 mm (0,0004”) Micrometric adjustments: by cordless radio control Joy Stick Side register: motorized Pre-setting register: automatically controlled through work station Pressure release: horizontal and sequential Type of motorization: digital AC vector motors – drives and vector motors are Bosh-Indramat system

Magiflex Gearless system is indicated to be used by all customers who, having lots of work changes and short or very short printing runs during the day, need a simple system easy to use.
Important feature of this machine is the possibility to position the locks/stoppers into a pre-print position by means of a workstation.
The printing groups are driven by a motoreducer to shift together the printing unit and the inking groups with automatic stop in printing position according to the selected repeat.

During the changeover phase the operator can select one single color, and decide whether to change the printing sleeve, the anilox sleeve or both of them. Another important feature of our sleeve hangeover system is that the doctor blade group and its relevant support are mounted on ball bearing thrusts with rack-in/out driven by couple of pneumatic cylinders. This solution allows to change the anilox sleeve without dismounting the doctor blade and relevant pipes.

Printing section

The printing groups have been designed to reduce to the minimum the down times needed for the movement of the anilox and printing cylinders supports when a sleeve change must be effected. This construction feature ensures:
• Exact alignment of the entire framework and the printing decks.
• Possibility of changing printing elements in the event of severe damages.
• Easy replacement of the central drum while always keeping the printing elements aligned.
The thickness of the brackets and frames is 100 mm.

In-machine Automatic Sleeves Change For Plate And Anilox Cylinders

On this gearless series an extremely fast and reliable sleeves change system has been achieved, to allow very fast changes and operator friendly operations, thus dramatically reducing the possibility of mistakes. Description of the changeover operations:
• With reference to the video screen the operator selects the colour stations where the sleeves change is required.
• The selectioned decks are unlocked and move backwards in around 2 seconds by means of mechanic actuators mounted in the ideal position for the change of the sleeves.
• To leave mandrels free and allow the change of the sleeves, the operator manually unlocks the cylindrical supports of the bearings which hold the mandrels, by laterally moving the supporting blocks and leaving free the space necessary for the sleeves change.
• The sleeves (or the single plate sleeve) are therefore unlocked and extracted and the new sleeves are mounted.
• At this point the sleeve holding mandrels and anilox mandrels go back to pre-printing position according to the repeat of the sleeve assembled.

Work station

Based on a computer with display and a PLC for central drum positioning. The operator mounts all the plates according to an engraved reference key on the printing cylinder or on the sleeves. The operator chooses the printing repeat on the display and then starts the automatic presetting of all printing groups (or just the ones chosen) which shift till the proper position. When all the colours result automatically almost positioned in register the operator can make small corrections through the remote control. The printing pressure adjustments result minimised being all the stations already positioned close to the web to be printed according to the parameters chosen by the operator. For each new working cycle the computer will require the following information:
• Selection of printing groups to be changed
• Printing repetition.
The computer will also display machine alarms by the centralised diagnostic according to the indications received
from the PLC. The computerised pre-setting system allows safe and quick job changeover being each station exactly positioned. It is also possible to memorize and repeat from the computer all tension controls of a single job and recall it in a future, making very easy the preparation and regulation of the tension when repeating the same job.
Furthermore, from the workstation it is possible to program any repeat with an increase of decimals of milimeter, and is also possible to “dis-phase” the speed of the drum with respect to the colours of up to 2% so as to
allow the use of a same sleeve with a variation of the printing repeat of up to +/- 1 / 2%.