| 摘要 |
PROBLEM TO BE SOLVED: To make opening of an air bag door constant and smooth in inflation of an air bag by forming an opening estimated part by laser processing passing through a base material and a soft layer to within surface material or to a surface of the surface material. SOLUTION: An opening estimated part 13 is formed by applying laser beam machining to a laminated formed article 11 in which a base material 21, a soft layer 41 and a front surface material 31 are laminated from the base material 21 side. Many through holes 14 extending from the base material 21 to the front surface material 31 through the soft layer 41 are linearly arranged. The opening estimated part 13 from the base material 21 to the front suffice material 31 is formed by laser beam machining. This opening estimated part 13 is a strength reduced part to be quickly broken by pressing of the back side of the air bag door part 12 in inflation of the air bag and for smoothly opening the air bag door part 12, and it is formed into an approximately H shape, an approximately U shape or a cross shape. |
