Feasibility of a machine concept for fast and accurate placement of sub-mm balls on a contiuous foil

C.P.M. Bunink, H. Nijmeijer (Supervisor)

Research output: Book/ReportReportAcademic


An experimental setup has been designed and realized, and an experiment has beenproposed for studying a concept for a foil coating machine as part of a roll-to-roll productionline. The machine serves to coat a continuous moving adhesive-coated PET foil with a layerof acrylate resin, and then place sub-mm balls, which are arranged in a tight pattern on arotating drum, accurately onto the foil. After that, the resin is hardened in a UV-light cure, andthe foil undergoes one more processing step before being rolled on a winder roll. It isunknown how the foil, the resin and the balls will behave during and after the placement ofballs on the foil, or how their behavior will affect the ball placement. Also, In the currentconcept, the drum drives the foil via the balls on its surface. It is uncertain whether the foilvelocity can be controlled this way, and whether the balls can still be placed with sufficientaccuracy if this is not the case. In the experimental setup, a pattern of balls is transferred froma rotating drum onto a moving foil coated with adhesive and resin. The drum and foilvelocities are controlled independently. The primary purpose of the experimental setup is toinvestigate whether it is possible to accurately transfer the pattern of balls from the drum ontothe moving foil, and what velocity differences between drum and foil can be tolerated. Thesecondary purpose is to study the behavior of foil, resin, and balls during and after the transfer.
Original languageEnglish
Place of PublicationEindhoven
PublisherEindhoven University of Technology
Number of pages47
Publication statusPublished - 2012

Publication series


Bibliographical note

DC 2012.036


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