| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin-made core which is superior in size precision and strength even when it is large-sized, and in which a manufacturing cost is suppressed without increasing scale of facilities.SOLUTION: A resin-made core 1 is manufactured by joining and integrating a plurality of core forming members 2 having the same cross-sectional shape as the core to be formed and formed by injection-molding a thermoplastic resin, by welding end faces thereof together. |
