| 摘要 |
PURPOSE:To make it possible to form pierced holes having a prescribed shape without requiring the working on burr around the pieced holes, by closing forces with projections on one force forcibly engaged with a soft material on the other force. CONSTITUTION:The mold 1 consists of a female force 11 and a male force 12. By closing the female force 11 and the male force 12, a cavity 2 having a configuration corresponding to the desired configuration of the intended item is defined. The female force 11 has projections 3 for forming pierced holes in the intended item, and on the other hand the male force 12 is provided with a soft material 4 at a position opposed to the projections 3 of the female force 12. A reactively foamable resin material in a prescribed amount is injected into the cavity 2 of the mold 1. The reactively foamable resin material would not enter between the projections 3 of the female force 11 and the soft material 4 of the male force 12. When the female force 11 and the male force 12 are separated, a foamed resin molded item that has a configuration in conformity with the cavity 2 and is provided with pierced holes formed by the projections 3 of the female force 11 is obtained. |
