| 摘要 |
PROBLEM TO BE SOLVED: To suppress the degradation of the dimensional accuracy in a plane shape of a foamed resin molding caused by the inward retreat of a molding of a molding shape profile forming end movable mold accompanying the core back operation. SOLUTION: A packing cavity 33 is formed by a fixed mold 31, a movable mold 32, and a spacer 70, and the upper and lower surfaces 72 and 73 of the spacer 70 are held by the fixed mold 31 and the movable mold 32. In a core back process, while a foaming cell grows inside, a surface layer part 50a is formed on the surface of a molding 50. Although retreating force to make the edge of the molding 50 retreat toward the inside of the molding 50 is generated, since the edge of the molding 50 is expanded to turn to the back of the undercut part 75 of the spacer 70, the shape of the molding cavity 33 is maintained to prevent the occurrence of the retreat. COPYRIGHT: (C)2010,JPO&INPIT |
