| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a sheet which can control the thickness of the sheet quickly and precisely to a desired thickness profile and a device for controlling the thickness of the sheet. SOLUTION: In the method for producing the sheet, a raw material is extruded by using a die having N (natural number of 2 or more) thickness adjusting means and molded into the sheet, an operation quantity to be output to the thickness adjusting means is calculated, the means are controlled based on the calculated operation quantity, and the thickness of the sheet is controlled. When the difference between the calculated operation quantity of the i-th (i=1-N) thickness adjusting means and an operation quantity to be output to the adjacent means is a prescribed value T or above, an operation quantity to be output to the i-th means is corrected to reduce the difference, an operation quantity to be output to the adjacent means is corrected based on a process model expressing the relationship between an operation quantity to be output and the thickness of the sheet to be obtained, and each corrected operation quantity is output to each thickness adjusting means.</p> |
