| 摘要 |
PURPOSE:To facilitate cutting and rewinding of a sheet in case the one is of large wall thickness or operation is made at a high speed by heating a cutting tool particularly in the case of thermoplastic sheet, allowing the cutting tool to make a circular motion at a circumferential speed equal to the sheet traveling, and thus permitting the two to travel in contact with each other. CONSTITUTION:When a swing arm 8 sinks and a touch roll 9 contacts an empty takeup shaft 3, a shaft 5 rotates being driven by said touch roll 9 or a sheet sendout pinch roll 10, and a heat cutter with its temperature elevated above the melting point of the sheet rotates in the direction of arrow at a circumferential direction approx. equal to the sheet speed and is put in contact with the sheet traveling between said empty takeup shaft 3 and a turn roll 4. While in contact with the same point of the sheet, the heat cutter 7 pushes it down and moves in a locus consisting of an arc of a circle, the sheet meantime being heated sufficiently to be fusion cut surely. Then the sheet cut end given adhesiveness previously on its surface is wound on the protrusive takeup shaft 3 to allow the sheet to be rewound from the takeup shaft 2 onto 3, which is followed by changeover to regular winding, wherein no power is supplied to the heat cutter. |
