| 摘要 |
PURPOSE:To obtain sound film layer with no pinhole by a method wherein air tight tube is brought into contact under pressure with the inner surface of lining material inserted in pipe line by expanding the tube with pressure fluid and, after that, the bonding agent layer of the lining material is hardened by introducing warming fluid in the tube. CONSTITUTION:Firstly, the tip of the lining material 1, to which air tight tube 3 is connected, is fixed to the delivery port 5 of a pressure vessel 4 so as to turn the lining 1 inside out at the turning part 7 by the action of pressure fluid fed in the tube through a feeding-in port 6 in order to insert the lining together with the tube 3 in a pipe line 2. Secondly, fitments 9 and 9' are fitted to both the end of the lining 1 together with the tube 3. Thirdly, pressure fluid is introduced through the feeding-in ports 14 of the fitments 9 and 9' in order to bring the lining 1 into contact bonding with the inner surface of the pipe line 2. Fourthly, after discharging the pressure fluid, the tube 3 is brought into contact bonding with the inner surface of the lining 1 by means of pressure fluid introduced through a feeding-in port 16. Under the state just mentioned above, warming fluid in a tank 17 is fed through a feeding-in port 16' into the tube 3 in order to heat and harden the bonding agent lying between the lining 1 and the pipe line 2. Thus, the lining of the pipe line is obtained without the generation of pinhole. |
