S1602-1-1 ロール端部からの空気流出を考慮した巻取りロールの内部応力解析(柔軟媒体ハンドリングと画像形成システム(1),社会変革を技術で廻す機械工学)

抄録

A winding model for prediction of in-roll stress distribution, considering air leaking effect is presented. Air layer is formed between webs within wound roll due to air entrainment, and then the air layer thickness varies with air leakage of the widthwise edges of wound roll while winding. It alters the stress distribution with reducing apparent roll stiffness. In this study, on estimating the air layer thickness, the air flow between webs is assumed as an incompressible squeeze flow between parallel plates in web-width direction. Additionally, it is extended to take into account that the stress at the already-wound part of the roll is sequentially varied from continuous web winding. Experimental validation result states that predicted value corresponds well to the experimental value. Furthermore, influence of air leaking effect on n-roll stress is verified by a parametric study.