| 摘要 |
PURPOSE:To prevent a quadrilateral hollow section from being deformed when a shaped section is bent, by inserting a solid core of raw rubber and a leaf spring into the quadrilateral hollow section along the length of the hollow section with the leaf spring positioned on the outer wall side of the quadrilateral hollow section, heating the shaped section to be softened, and molding arcuately the shaped section. CONSTITUTION:A thermoplastic synthetic resin shaped section 1 having a quadrilateral hollow section 2 into which a leaf spring 4 and a solid core 3 of raw rubber are inserted along the length thereof with the leaf spring 4 positioned on the outer wall side is heated to be softened, is fitted in a molding groove 6 in a mold and is bent. In the case of bending of the shaped section 1, although the solid core 3 of raw rubber has a crosssectional area a little smaller than the inner configuration of the hollow section of the shaped section 1 before it is bent, the inner wall side is compressed by the bending, an the size of the inner wall side is increased to a width approximately equal to the size of the inner wall of the quadrilateral hollow section 2. Although the size of the outer wall side of the core 3 is decreased, since the leaf spring 4 located on the outer wall side is not deformed in the direction of the with, the size of the outer wall side of the hollow section is set to a prescribed size, and when the shaped section is bent, the quadrilateral hollow section is prevented from being deformed. |
