Browsing Proceedings of the International Conference on Web Handling by Author "ebf0dbe3-7bfc-4b8d-9a97-112268ab6471"

Now showing items 1-6 of 6

    • Contact mechanical approach to the winding nip 

      Jorkama, M.; von Hertzen, R. (Oklahoma State University, 1999-06)
      A contact mechanical model for the winding nip, consisting of the wound roll, winding drum and the intervening sheet, is presented. The roll and drum are modeled as linear, orthotropic, homogeneous cylinders with a rigid ...

    • Development of web tension in a winding nip 

      Jorkama, M.; von Hertzen, R. (Oklahoma State University, 2001-06)
      Today practically all winding devices apply a nip to the wound roll. In this winding method, radial pressure is applied by a winding drum to the wound roll at the point where the web enters the roll. This reduces the air ...

    • Strain-inducing mechanism of a rolling nip on a paper stack 

      Arola, K.; von Hertzen, R. (Oklahoma State University, 2003-06)
      The rolling of a cylindrical drum on a stack of separate paper sheets is studied using the finite element method. A two dimensional model under plane strain conditions is considered. The material of the sheets is modeled ...

    • Study of stress-strain relation for paper roll 

      Arola, K.; von Hertzen, R.; Jorkama, M. (Oklahoma State University, 2001-06)
      In the present method a wound roll of paper is loaded against a nip roller and the measured values of the nip width and the roll indentation are compared with the corresponding calculated values of the non-linear problem. ...

    • Wound roll generated unstable vibration 

      Jorkama, M.; von Hertzen, R. (Oklahoma State University, 2003-06)
      Nip contact between the wound roll and the winding drum, rider roll or some other nip roller may cause that the wound roll is deformed into a convex polygon. This deformation process is accompanied with a very strong ...

    • Wound roll generated unstable vibration on a two-drum winder 

      Jorkama, M.; von Hertzen, R. (Oklahoma State University, 2005-06)
      Nip contact between the paper roll, winding drum and rider roll or some other nip roller may cause that the wound roll is deformed into a convex polygon. This deformation process is accompanied with a strong vibration. The ...