| 摘要 |
PURPOSE:To improve the workability in masking and masking precision by wrapping a part not to be coated with the outer peripheral surface of the masking member inserted into an opening, and parting the part to be coated and the part not to be coated with the peripheral edge part of the member. CONSTITUTION:The part 4 on this side surface of the peripheral wall of an opening 2 having the peripheral wall extending to direction of the depth is to be coated, the part 5 on the back side is not to be coated, and only the part 4 is coated. In case of the state fitting the masking member 21 in the inside of the part 5, the part 5 not to be coated is wrapped by the outer periphery surface of the masking member 21 having the shape so that the part 4 to be coated and the part 5 not to be coated can also be parted by the peripheral edge of the masking member 21, and then the part 4 is coated. As a result, the workability in masking and masking precision can be improved.
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