| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner mold for molding a FRP tube joint for molding suitably a circular groove for mounting a packing on an inner face of the FRP tube joint. SOLUTION: In the inner mold for molding the FRP tube joint for setting a rubber ring mold on a periphery of the inner mold for molding an inner face of the FRP tube joint and for molding the circular groove for inserting the packing into an inner peripheral face of the joint, the inner mold for molding the FRP tube joint is provided with a tiny hole for pouring a pressurized liquid which penetrates to the periphery from an inner periphery of the rubber ring mold, and the tiny hole of the peripheral side of the inner mold is covered with a tape. |
