Conveyance Support and Development
Industry: Film & Plastics
INTRODUCTIONThe client was developing machine capabilities to convey a new product on an existing coating machine. Due to significantly different properties of this web compared to those of traditional products, a number of conveyance issues arose, which required substantial machine changes to be made. The client was looking to achieve a better understanding of their full machine dynamic tension profile and explore options to reduce / eliminate creasing issues with their new product
SOLUTIONAn initial conveyance consulting visit was made to provide process understanding, initiate immediate actions and develop project plan. Optimation developed dynamic coating machine tension models and conducted product specific designed experiments in Optimation's MCF to help optimize machine configuration and process set-points to enable robust conveyance for client's paper and PET webs, with reduced draw-lines and creasing.
RESULTSThe tension model outputs are designed as a tool to help optimize process machine tensions during steady state, acceleration and deceleration to keep actual web tensions within process limits. It also enables assessment of the web tension implications of future machine process changes (such as machine speed or acceleration changes). When machine process changes are made, the tension model can be used as a tool to help develop new tension set-points to help insure robust conveyance. The assessment of creasing and draw-lines as a function of turn bar design, machine tension set-points, and web spreading options helped to develop product specific machine configurations and process set-point to eliminate / reduce web creasing issues at the exit of turn bars.
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Conceptual Design / Engineering Studies
Media (Web) Conveyance