| 摘要 |
PURPOSE:To improve the manufacturing efficiency, by a method wherein after injection molding of resin by making use of a core made of the resin in which flexible main insert exposed from an end face of the core having a hollow part and a plurality of flexible auxiliary inserts which are caused to branch from the same are buried, an exposed end part of the main insert is pulled and the core is collapsed. CONSTITUTION:A core 1 made of resin, which is molded under a state where at least one flexible insert member 4 which is extended in a fixed direction in parallel with the surface of the core 1 and has at least one end part exposing outside from an end face of the core 1 and a plurality of flexible auxiliary insert members 5 which is caused to branch from the flexible main insert member 4 are buried is used. When exposing both end parts of the flexible main insert member 4 are pulled in the direction indicated by arrow A, though the core 1 is destroyed at a V-shaped groove 8, since a U--shaped groove 7 is formed along the member 4 on the inside of the core 1, the core 1 is not destroyed at a part in which the member 4 is buried and every part including the insert members 4, 5 is removed from a resin molded product 12. Therefore, manufacturing efficiency of the molded product 12 can be improved. |
