| 摘要 |
A method of manufacturing a pipe ( 1, 26, 26' ) from thermoplastic material consisting in helical winding of a pre-manufactured strip ( 2, 21, 21' ) from thermoplastic material onto a drum with the use of rotary rollers and bonding together the adjacent coils. Prior to winding said strip ( 2, 21, 21 ' ) onto the drum ( 5 ), the strip ( 2, 21,21 ' ) is formed into a U profile ( 3 ) or an L profile ( 8 ) in cross section, and after that the so formed profile ( 3, 8 ) is wound onto the drum ( 5 ) at the same time bonding together the adjacent coils in such a way that a wall or walls of the L or U profile (3, 8 ) create an external, helical reinforcement rib ( 6, 25, 25' ) of the pipe ( 1, 26, 26' ). The application subject is also the thermoplastic strip for manufacturing the pipe. |
