| 摘要 |
The invention concerns a method and device for joining thermoplastics pipes manufactured by spiral winding of a hollow profile. The method according to the invention is characterized in that a welding mirror (5) adaptable to the prepared end surfaces of the pipes and provided with heating means, is inserted in the slot between the pipes (1), the pipe ends are pressed against the heated welding mirror to heat the thermoplastics material at the end of the pipe ends to a welding temperature to render the plastics material on the joint surface plastic, the welding mirror (5) is removed from between the pipes, the heated pipe ends are pressed against each other so that the thermoplastics materials melt together to form a welded joint, and the welded joint is allowed to cool. The welding mirror (5, 5') according to the invention is characterized in that the welding mirror is adaptable to the shape of the end surface of the pipe cut along a radial side wall (6) of the hollow profile. |
