| 摘要 |
The individual emitters are introduced inside the tube during its manufacture phase, sligtly welded to its internal surface and are transferred by the tube itself. Soon after, and while the emitter is located in the region of the fixed shaping mechanism (corrugator), a worm screw belt continuously moving inside the tube with the same speed as the tube being produced, is radially displaced at programmed time intervals towards the wall of tube passing, reduces the void space between the belt and the emitter, compresses it in a prolonged way in one or in two stages so that it is rigidly welded, and returns to its initial position. |
