JOINING METHOD OF PLASTIC

PURPOSE:To reduce the deformation of a work at the time of joining, and to enable precise joining by executing conductive coating to at least either one of the joint surfaces of each plastic when plastics are joined mutually and induction-heating or resistance-heating the joint surfaces. CONSTITUTION:Cu plated layers 3 in approximately 100mum thickness are executed on both vinyl chloride resins 1, 2 as a conductive substance, the surfaces of the Cu plated layers 3 are superposed, a high-frequency power supply 4 is wound around the surfaces of the Cu plated layers, and the Cu plated surfaces are induction-heated by a high-frequency power supply 5 and 150KW is used as the capacity of the high-frequency power supply 5. Accordingly, only the Cu plated 3 sections of joint surfaces are heated and melted, and the vinyl chloride resins 1, 2, which are hardly subject to a thermal effect and are not deformed, are joined.