抄録
It is expected that a considerably strong pipe is produced from the film-band package prepared as a cylinder, especially when the drawn film is used. In this paper, a new type of machine, which is capable to cross-wind up the film-band into a cylindrical form, is proposed and the operating condition of the machine is discussed.
The machine proposed here consists of a long taking-up rod and a couple of disks. The taking-up rod moves in a direction at a constant speed, and disks equipped with letting-off film-band supports and film-band guides, rotate around the rod with a constant rate clockwise and anti-clockwise respectively. In order to stretch the film uniformly over its width and give a good form to the cross-wound film-band package, it is necessary that the film-band guides hold a suitable angle against the axis of taking-up rod. However, the inclination of film-band guide results in that the axis of film-band guide and the axis of taking-up rod do not lie in a plane, and therefore the film-band passing over the guide is twisted between the guide and the rod. The twisting of film-band gives undesirable effects on the state of wound-up package. Then the operating condition to minimize the effect of twisting is studied mainly by experiments.
