| 摘要 |
<p>PURPOSE:To perform thermal fusion simply and easily by double coiling a wire material along the inner surface of a heater generating body which wire material is made by coating a conductor material with a ferromagnetic material layer. CONSTITUTION:Pipes 10, 10 to be joined are inserted into a pipe joint 12. A heat generating wire material 14 is embedded in the shape of a double coil on the inner surface of the pipe joint 12. The heat generating body 14 is a wire material made by coating a conductor material with a ferromagnetic material layer. The pipe joint 12 is formed by winding a heat generating wire material 32 embedded in a plastic layer of a thermoplastic resin tape 30 together with the tape 30 around a mandrel 34, and thermoplastic resin is made to flow into the gap between the mandrel 34 and an outer frame arranged with a gap between the mandrel 34. As a result, heating temperature may be automatically controlled with the Curie point of the ferromagnetic material as a reference. Deformation of the pipe joint is prevented by the surface effect.</p> |
