| 摘要 |
PURPOSE:To provide a molding method for a core made of resin, capable of lightening the weight of the resin core, preventing the core from being deformed and broken, reliably fixing the core to molds for a resin product and enabling a melting-out time to be shortened. CONSTITUTION:A pipe 5 made of metal is detachably mounted to a receiving portion 6 in a front side mold 3 of a pair of molds 3, 4, which are divisible from each other, and the rear side mold 4 is closed to position the metal pipe 5 in the paired molds 3, 4. In this state, the interior of the molds 3, 4 is filled with a water-soluble resin, whereby a hollow-shaped core 1 having the metal pipe 5 burried in a cylindrical portion 1a is formed. |
