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公开(公告)号：JP2002086537A
公开(公告)日：2002-03-26
申请号：JP2000276072
申请日：2000-09-12
Applicant: TORAY INDUSTRIES
Inventor： NAKAI YASUHIRO , UEHARA MASATSUGU , HIRATA HAJIME
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a sheet to be taken up in the good shape of a product roll. SOLUTION: This sheet manufacturing method comprises the steps to measure the thickness distribution, in the width direction, of the sheet, then control the thickness of the sheet based on the measurements and take up the measured sheet as a product roll. The integral value of differences between the measurements of the described thickness distribution and a first target value previously set based on the outer shape profile of the product roll, at each of the measuring positions based on the described measurements, is sought. Further, a second target value at each of the measuring positions is revised on the basis of the described integral value, and the thickness of the sheet at each of the measuring positions is controlled based on the difference between the second target value and the measurements of the thickness of the sheet at the present point of time.
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公开(公告)号：JP2000177263A
公开(公告)日：2000-06-27
申请号：JP35440498
申请日：1998-12-14
Applicant: TORAY INDUSTRIES
Inventor： ISHIKAWA KOJI , UEHARA MASATSUGU , HIRATA HAJIME
Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for manufacturing a printing base sheet for a thermal stencil having a plastic film of a uniform thickness in the base sheet for the stencil manufactured by adhering a porous support made of synthetic fiber to one side of the film without adhesive and co-orienting it. SOLUTION: In the method for manufacturing a printing base sheet for a thermal stencil for obtaining a composite film by sequentially conducting a casting step of discharging a synthetic resin from a mouthpiece and casting a plastic film, an adhering step of adhering a porous support made of synthetic fibers to one surface of the film without adhesive, and a co-orienting step of co-orienting the film and the support, a plastic film thickness measuring step of measuring a thickness of only the plastic film of the composite film is provided after the co-orienting step, and the thickness of the plastic film is controlled by feeding back thickness information in its width direction to the casting step. The apparatus for manufacturing the base sheet for a thermal stencil by the method is provided.
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公开(公告)号：JP2002086538A
公开(公告)日：2002-03-26
申请号：JP2000277701
申请日：2000-09-13
Applicant: TORAY INDUSTRIES
Inventor： NAKAI YASUHIRO , UEHARA MASATSUGU , HIRATA HAJIME
Abstract: PROBLEM TO BE SOLVED: To provide a sheet manufacturing method by which the low control precision attributed to the asymmetry of response by a thermal sheet thickness adjusting means is upgraded in a simple way as well as a sheet thickness control device. SOLUTION: This sheet thickness control device used in the sheet manufacturing process is of such a function that a polymer is extruded in the shape of a sheet with the help of a die equipped with a plurality of thermal thickness adjusting means and the extrusions are molded into the sheet of a desired thickness and further, the thickness distribution in the width direction, of the sheet is measured and an amount of heat to be applied to the thermal thickness adjusting means is controlled based on the measurements. In this control device the amount of heat is applied to the thermal thickness adjusting means in such a manner that the variation of the amount of heat to be applied to the thermal thickness adjusting means shows that it is greater when the amount of heat is decreased compared to the case when the amount of heat is increased.
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