Appearance defect candidate extraction device, appearance defect determination device, film-like product manufacturing apparatus, appearance defect determination method, and film-like product manufacturing method

摘要

PROBLEM TO BE SOLVED: To provide a poor appearance determination device and a poor appearance determination method which precisely detect a poor appearance causing part causing a poor appearance when a film-like object is rolled up, and an apparatus for producing the film-like object and a method for producing the film-like object capable of preventing occurrence of a poor appearance by the poor appearance failure-causing part.SOLUTION: A deviation at each measuring point is calculated at each clocking time change from a thickness of a film-like object at each measuring point in a scanning direction and an average value of thicknesses of the film-like objects in a scanning direction by calculation means. An average value of deviations at clocking time changes at same measuring points in a width direction of the film-like object is compared with a predetermined deviation threshold value. Measuring points where the average value of deviations exceeds the deviation threshold value are extracted as poor appearance candidates. When the poor appearance candidates continue, in the scanning direction, beyond a predetermined range, the continued measuring points are determined as poor appearance causing parts.SELECTED DRAWING: Figure 6