METHOD FOR MEASURING DISTORTION RATE GENERATED BY THERMOFORMING

摘要

PROBLEM TO BE SOLVED: To provide a method for easily measuring the distortion rate in the thermoforming. SOLUTION: A method is provided with a step for observing an image and measuring the time (t) before a given point on the acrylic synthetic resin plate 3 is brought into contact with a mold 10, a step for measuring the thickness h(t) on the given point of the acrylic synthetic resin plate 3 brought into contact with the mold 10 and a step for substituting the time (t) before the thickness h0 of the given point of the acrylic synthetic resin plate 3 is formed into the h(t) and the thickness h0 and h(t) of the acrylic synthetic resin plate 3 before and after the deformation into the following formula (1) and computing the distortion rate 9 of the acrylic synthetic resin plate 3.