| 摘要 |
Drip irrigation device is made by continuously extruding a tube (4) and simultaneously feeding a plurality of dripper units (8) in succession within the tube (4) as it is extruded. Each dripper unit (8) is arrested as it arrives at a first location which is a short distance downstream of the extrusion head (2) where the extruded tube (4) is still tacky, and is then moved transversely to bring into light contact with the tacky surface of the extruded tube (4) to cause the dripper unit (8) to lightly adhere to the tube (4) and to begin to move axially with it. A short distance downstream of the first location where the dripper unit (8) has attained the same axial velocity as the extruded tube (4), the dripper unit (8) is pressed into firm bonding contact with the tacky inner surface of the extruded tube (4). <IMAGE> |
