| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact molding that prevents sink marks and ensures rigidity and secure attachment strength even with a limited amount of material, and reduces cost for a die device with an easy-to-mold shape.SOLUTION: A molding 10 has, along the outer circumference of a protruding section 20, column base ribs 30 that extend in the axial direction of the protruding section, the direction intersecting the back surface of a substrate 11, and that extend in the axial direction of the protruding section from the base end of the protruding section 20. The protruding section 20 is bonded via the column base ribs 30 to the back surface of the substrate 11, while the base end is supported apart from the back surface of the substrate 11. The column base ribs 30 have a shape that can be demolded by cores 44 which is removed outward. The cores are separated at the protruding section 20 from each other along the escape direction which intersects the mold-release direction of the molding 10 as a whole, the mold-release direction being parallel to the axial direction of the boss. |
