| 摘要 |
PROBLEM TO BE SOLVED: To provide a foaming mold capable of taking out a resin molded product excellent in appearance. SOLUTION: The foaming mold 30 is mainly constituted of an upper mold (fixed mold) 31 and a lower mold (movable mold) 51. The mold 30 is subjected to core-back operation in foam molding to increase the thickness of a resin material but, at this time, the foaming of a molten layer is suppressed in a corner part, which is near to the molding surface (opening forming part 55) along a core-back direction in the molding surface (surface side molding surface 53) crossing the core-back direction, by a solidified skin layer 81 to prevent the expansion of the resin material along a cavity 45. However, a cavity expansion part 70 expecting the thickness increase quantity of the resin material is formed to this part and, since the skin layer 82 formed along the cavity expanded part and the skin layer 83 formed on the surface side molding surface 53 becomes almost flush with each other after the completion of core-back, the surface of the resin material becomes a flat shape free from unevenness. COPYRIGHT: (C)2006,JPO&NCIPI |
