Printing technology web offset printing

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In the web offset printing, difference is made between newspaper printing machines and commercial web offset machines.

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Printing technology web offset printing

  1. 1. Printing technology Web offset printing Technical Support Sappi Fine paper Europe
  2. 2. Printing Technology Web offset printing <ul><ul><li>In the web offset printing, difference is made between newspaper printing machines and commercial web offset machines. </li></ul></ul><ul><ul><li>Characteristics of the web offset printing: </li></ul></ul><ul><ul><ul><ul><ul><li>High printing speed up to 900 m/min </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Grammages of 45 - 200 g/m² usual </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>High runs </li></ul></ul></ul></ul></ul>
  3. 3. Printing technology Web offset printing <ul><ul><li>MAN LITHOMAN </li></ul></ul><ul><ul><li>4/4 – Farben HSWO machine </li></ul></ul>Operator console
  4. 4. Printing technology Web offset printing Printing units
  5. 5. Printing technology Web offset printing Drying oven Hot air Inlet temperature > 200°C Web temperature approx. 120°C The length of the oven is very important
  6. 6. Printing technology Web offset printing 1 Automatic storage web changer 2 Drawing-in apparatus 3 Floating indent apparatus 4 Rubber against rubber printing apparatus 5 Continuous main shaft 6 Paper catching device 7 Dryer 8 Cooling unit 9 Numbering apparatus 10 Silicon-coating 11 Perforating apparatus 12 Wet coating unit 13 Plough fold 14 Turning bars 15 Former MAN-Roland Octoman
  7. 7. Printing technology Web offset printing Reel with join
  8. 8. Printing technology Web offset printing Reel in the autopaster
  9. 9. Printing technology Web offset printing Rotary Press: 1 Unit
  10. 10. Printing technology Web offset printing Paper web in one unit Plate cylinder Blanket cylinder Plate cylinder Blanket cylinder Paper web Colour absorption Water absorption Moisture resistance pH5 No deformation Resistant against cracking of the colour
  11. 11. Printing technology Web offset printing Ink drum
  12. 12. Printing technology Web offset printing Hot-air dryer
  13. 13. Printing technology Web offset printing Re-moistening
  14. 14. Printing technology Web offset printing Re-moistening Chill roll assembly
  15. 15. Printing technology Web offset printing Paper web on the chill roll
  16. 16. Printing technology Web offset printing Silicone applicator
  17. 17. Printing technology Web offset printing Center cut
  18. 18. Printing technology Web offset printing Paper on the turner bars
  19. 19. Printing technology Web offset printing Paper on the turner bars
  20. 20. Printing technology Web offset printing Fold softening
  21. 21. Printing technology Web offset printing Paper on the former fold
  22. 22. Printing technology Web offset printing Cylinder folder
  23. 23. Printing technology Web offset printing Cylinder folder
  24. 24. Printing technology Web offset printing Chopper folder
  25. 25. Printing technology Web offset printing Stacker

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