| 摘要 |
PROBLEM TO BE SOLVED: To detect a projection amount and/or a pull-in amount of an ejector pin 5 from an upper edge of an insertion hole 4 of a bottom mold 2 easily with high accuracy.SOLUTION: An ejector plate 3 is positioned at predetermined height, and light is emitted from obliquely upward to a cavity surface 16 of a bottom mold 2 to obtain an image. The image is captured from above of the bottom mold 2, and based on length of a shadow of an ejector pin at the cavity surface in the captured image, or length of a shadow of a part of the insertion hole 4 of the bottom mold 2 on a top face of the ejector pin 5, a projection amount and/or a pull-in amount of the ejector pin 5 are determined. |
