Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 14, 2016 - March 15, 2016
How a wound roll stress distribution will change when a nip roller is used during winding, and how a wrap angle around the nip roller will affect the roll stress distribution, these are investigated by simulating a winding process of two-dimensional models composed of a web, winding core and nip roller using a FEM software. The results show that the roll stress distribution is classified into the following three groups, (G-I) no nip roller, (G-II) nip roller with zero wrap angle and (G-III) nip roller with non-zero wrap angle (90, 180 deg.). The roll stresses increase in this order. The stress distribution of (G-III) is almost the same even though the wrap angle changes. Macroscopic slipping patterns (like J-line) of wound rolls indicate that large friction forces due to a nip load pull the outer layers to the core rotational direction.
