| 摘要 |
<p>PURPOSE:To provide possibility of close contact of a thermoplastic sheet with a core die consisting of a magnet in such a way as alongside it and fusion welding a saddle with a mother pipe evenly by attracting the sheet fitted with a spiral ferromagnetic metal wire and fixing it to the surface of the core die. CONSTITUTION:On a core die 1 in the form of a semi-cylinder consisting of an electric magnet to form a saddle, a hole with the same dia. as the bore of a cylinder is bored in the center, and a spiral groove is formed at its oversurface, and in this groove a thermoplastic sheet 2 fitted with a ferromagnetic metal wire 5 is attracted and fixed through utilization of the magnetic force Then a core form 3 to form cylinder is fitted in the core die 1 and a terminal pin fixed to the ends of the metal wire 5 is fixed to a core form 4 for molding a connect ion port. Then these core dies are set in an injection molding machine, followed by shutting of the dies, and thermoplastic resin is injected to make a saddle joint.</p> |
