| 摘要 |
PURPOSE:To contrive to rapidly repair the inner face lining of an existing pipe by a method wherein molten resin material is fed from an extruder to a die and, at the same time, pressurizing air is fed through the die into the inner space of a resin lining and, in addition, the outer space of the resin lining is evacuated. CONSTITUTION:In an existing pipe 1 having vertical or horizontal bent portion, a die 2 is installed at the end of a pipe in a vacuum pump side pit 9. A collected hose 5 (a resin carrying hose 51, an air feed hose 52, a controlling cable and a towing wire 61), which is connected to the die, is laid in the existing pipe. From a melt resin extruder, which is installed outside the pipe, molten resin material is carried through the resin carrying hose 51 to a tip nozzle 21. After that, a trumpet-shaped molten resin, which is delivered from the die 2, is enclosed so as to form a balloon in order to apply internal pressure to it by charging pressurizing air from nozzles 22 in the die 2. After the state applied by the internal pressure is confirmed, a threaded cap is fixed to the end of the pipe at the vacuum pump side so as to connect a vacuum pump to the interior of the pipe in order to vacuumize the interior of the pipe. The molten resin is expanded to the inner face of the pipe by means of the internal pressure so as to be lined to the inner face of the pipe. |
