b'TAIL THREADING INNOVATIONSReducing the draw provides the potential to increase machine speed and optimise furnish. The RunPro EasyOne web stabiliser optimises the web release with a special high-vacuum system during the critical sheet release between the upper cylinder and the vacuum roll. It prevents the web from following the upper cylinder, resulting in fewer breaks and defects.When designing RunPro EasyOne, traditional air nozzles and mechanical seals across the machine have been replaced by pivoting high-release,Figure 4. Runtechs tail threading concepts are safe, reliable and maintenance free.non-contact nozzles. In critical opening nips, the nozzles bend andwould not be possible with manualCASE STUDY: SMURFIT KAPPA CALI PM4, do not break the fabric if a papertail threading without risking operatorCOLOMBIAjam occurs. Air is blown with highsafety. Also, thanks to the automatedSuccessful ropeless tail threadingspeed through the high-releaseprocess, operators can focus on otherRopeless tail threading optimisation in nozzles against the fabrics runningtasks. All these benefits are reflectedSmurfit Kappa Cali PM4 led to excellent direction. Thanks to the combinationin a short payback time. results. The average threading time of the geometry, the construction ofafter a sheet break has dropped by the stabiliser and the dynamic forcesAccording to Lahtinen, conversion50-60%.created by the air flows, a negativefrom a conventional rope carrier pressure is created in the openingsystem to a ropeless one is fast, takingSmurfit Kappa Cali PM4 makes both sack paper and linerboard, so there nip towards the release point. Thisfrom only a few days to no more thanhad to be a possibility of bypassing the negative pressure ensures that theone week. It can be carried out inClupak unit. Earlier, a long downtime web sticks to the felt and not toseveral stagesfor example, overwas needed to re-route the tail the cylinder surface. The specialthree years during planned machinethreading ropes. The mill was losing and patented design is very robust.shutdowns. To speed the project upClupak ropes 34 times per month, Possible paper jams and wearand consider all the details, we createwhich led to additional downtime and part consumption are significantlya 3D scan of each paper machine.caused production losses. reduced. These scans are used in engineering and to write assembly instructions forRuntech Systems delivered TailBladeconversion UP TO 80% SHORTER TAIL THREADING TIMEthe mill. Thanks to accurate scanning,M units for the pre- and after-dryers,from a The benefits of ropeless tail threadingmeasurement errors can be avoided,ropeless Clupak and reel area. Reelconventional with Runtech Systems technologyhe adds. modification also included a full- rope carrier are numerous. As stated earlier, itwidth pull-down foil to make turn-upsystem to a improves operator safety significantlyIf a machine has a challengingautomatic and operator-free. Start-upropeless one while also shortening tail threadinggeometry, it is possible to test thewent extremely well. The averageis fast, taking time during web breaks by up totail threading equipment with thethreading time after a sheet breakfrom only a dropped by 5060%. Now the operator 80% to increase production. In manycustomers own paper or boardcan select the tail threading path usingfew days to cases, the technology enables millson Runtech Systems demo pilota switch to speed up the transfer fromno more than to increase machine speed, whichmachine.sack paper to linerboard. one week62 WORLD PULP&PAPER'