| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that a cheap hollow resin molding is impossible to provide due to an increased production cost for manufacturing a split mold when an inner rib is applied to the hollow resin molding. <P>SOLUTION: The problem is solved by applying a load to an outer surface of a first wall of a hollow body where a vertical wall 4 and a vertical wall 4' are brought into contact with each other. The hollow body is formed by blow molding of a thermoplastic resin and has the first wall and an other side wall, which confront each other, and the vertical walls 4 and 4' perpendicular to the first wall are formed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
