| 摘要 |
PURPOSE:To insert a heating tool at the state where an adhesive is not yet cured, and to enable the heating tool to be exactly arranged at the branch of a piping by a method in which while sending heated and pressurized fluid into the lining, a specified heating tool is inserted from a branched pipe thereinto, and the advancement of the heating tool is stopped by a temperature detecting means at the branched part of the piping, and then after the curing of the adhesive has been completed, the heating tool is heated, energizing an electric heater, whereby the lining of the branched part is melted and perforated. CONSTITUTION:When a heating tool 4 reaches a branch, the temperature of the lining is quickly detected by a thermocouple 10, and its signal is transmitted to an electric circuit, whereby the sending of the first coil spring 1 is stopped. While continuing the pressurizing and heating of the lining, after its hardening has been completed, a switch 25 is set on. Then, a heating plate 7 is energized and an electric heater 5 generates heat, thereby melting the thermoplastic 6 covering the heater. The electric heater 5 is pushed to the lining by the self weight of the heater 5 and the elastic force of the second coil spring 2, whereby the lining of the branch is melted and perforated. |
