| 摘要 |
PROBLEM TO BE SOLVED: To provide a bottomed cylindrical component of high molding height and a manufacturing method thereof only by near flexure molding by using cold press molding which not only dispenses with paired special works to each of both dies (die and punch) but also is capable of mass production from blank materials.SOLUTION: A manufacturing method for a bottomed cylindrical component includes a premolding process and a permanent molding process for forming a square cylindrical component as a bottomed cylindrical component by setting a blank material 1 with folds 1d, 1e, 1f formed by the premolding process between the die 4 and the punch 3 to perform press molding. When a rib 1g that overhangs outward from between adjacent vertical walls 1b of the square cylindrical component in a planar view upon press molding in the permanent molding process, a corner part 4c of the inner side face of the die 4 is provided with a groove 4f.SELECTED DRAWING: Figure 4 |
