| 摘要 |
The present invention relates to a process for manufacturing an extruded tube (22) provided with at least one optical fibre (21), which consists in extruding the tube around the fibre(s), in drawing the tube and the fibre(s) by means of a tracked haul-off device (7) and then a capstan haul-off (10), in producing an elastic elongation of the single extruded tube (22) by establishing a difference in speed between the tracked device (7) and the capstan haul-off (10), the release of this tube on exiting the capstan haul-off resulting in an additional length for the fibres, characterised in that the speed of movement of the fibre(s) upstream from the extrusion operation and the speed of movement of the tube downstream from the capstan haul-off are measured and then the ratio of these two speeds is compared to a predetermined ratio, the result of this comparison being used to control the ratio between the speed of the tracked device (7) and that of the capstan haul-off (10) so as to obtain a constant additional length for the fibres. The invention also relates to an assembly permitting the operation of the process. Application to the manufacture of optical fibre cables. <IMAGE> |
