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process for the adjustment of the thickness of the film on the film plans products plants extrusion for films plans
process for the adjustment of the thickness of the film on the film plans products plants extrusion for films plans
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机译:调整胶片平面上胶片厚度的过程制品厂胶片平面挤出
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摘要
To achieve a substantially uniform thickness of film extruded from or coated by a sheet die, the thicknesses of the film are measured over its width and the film is sub-divided widthwise into imaginary sections of equal length. Each film section is associated with a correcting section of the sheet die. If the thickness measurement reveals a thick or thin portion in a film section, the associated correcting section is cooled or heated, respectively. The mean thickness distributions are determined from the measurements and employed as a correcting signal for setting elements of the individual correcting sections.
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