| 摘要 |
PURPOSE:To arrange a conductive wire in an inner circumferential part of a joint body at a uniform depth and fixed space, by a method wherein a coated conductive wired is heated, wound spirally round an inner circumferential molding surface of a core while melting a thermoplastic resin layer, and thermoplastic resin is injection-molded within a mold. CONSTITUTION:A coated conductive wire 2 is supplied to a heater 3 from a bobbin 4, the coated conductive wire 2 is heated and wound spirally round an inner circumferential molding surface 12a of a core 12 at fixed tension while melting its thermoplastic resin layer 22. Since the thermoplastic resin layers 22 are welded to each other at parts of a coated conductive wire 2 adjoining to each other following to winding-up, the one coated conductive wire 2 is formed cylindrically after completion of the winding-up. The core 12 is arranged at a fixed position of a mold 1, a gap 13 between an outer tool 11 and the core 12 is filled with thermoplastic resin of the same material as the thermoplastic resin layer 22 of the coated conductive wire 2 and injection molding is performed. The filled out thermoplastic resin is unified with the resin of the thermoplastic resin layer 22 of the coated conductive wire 2 by becoming soluble in each other. |
