| 摘要 |
PURPOSE:To form a coated film in the desired thickness by setting a color tone computer on the outlet side of a surface treating line to obtain a treated film thickness signal, and regulating a control actuator with the output of the computer to accurately measure the film thickness without being affected by the kind of a material to be surface-treated. CONSTITUTION:The material 11 to be surface-treated is treated in a surface treating part 12, and a film thickness signal is obtained by using the color tone computer 14 provided on the outlet side 13 of the line and utilizing the correlation between the surface color tone and the surface-treated film thickness resulting from experimentation. The output of the computer 14 is sent to a control means 15, operation is carried out in the means 15 to eliminate the deviation between the desired value and the output of the computer 14, and either of the amt. of a processing soln. to be discharged and the line velocity is imparted by the control actuator 16 to a final control element by using the output signal. As a result, the thickness of the treated film of the material 11 is on-line and accurately measured even if the element contained in the material 11 is the same as the element of the film and is a light element, and the desired thickness can be obtained.
|
