| 摘要 |
Hot attachment of drippers (1) takes place downstream of the calibrator (13) by pinching dripper (1) and pipe wall (3) together, between opposed surfaces (20, 22b), of which one (22b) is driven at the speed of tube advance. The other (20) is fixed on a dripper guidance rest (16). An Independent claim is included for the production line described, and the irrigation pipe so produced. Preferred features: Drippers are presented for pinching in succession, their extremities initially adjacent. A fixed rest (21) presses against the back of the first supportive surface (22b). Dripper feed velocity (V7) on the guide, is given by V7=V2L/d, where L is the dripper length, d is the separation between drippers and V2 is the feed rate of the pipe. The rest surface (22b), being soft, conforms with the surface of the dripper turning towards the internal pipe wall. Pinching takes place just downstream of the calibrator, preferably in the tube coolant liquid. Drippers are preheated electrically (PL) on the fixing face, to 90-160 degrees C, preferably 140 degrees C. |
