| 摘要 |
PURPOSE:To enable free selection of sizes of grooves and groove pitch and elimination of inclined ribs and narrowed grooves by forming a spacer by extrusion molding to a tension member and forming at the same time shallow grooves thereto and cooling the member then cutting deeply the grooves by a slotting device. CONSTITUTION:A tension member 1 is formed with shallow grooves in the extrusion die 10 of an extruder 8 and is formed with a spacer 7 by extrusion molding and thereafter the spacer 7 is cooled while the member passes through a water tank 14. The spacer 7 is fed via a feeder 24 into a slotting device 15 attached to a cage 22 and is cut to have prescribed grooves 4 by a cutter 25. The cut spacer enters an aggregating die 20. On the other hand, optical fibers 2 from a bobbin 23 enter the die 20 via an aggregating plate 21. The fibers 2 in said die are inserted into the grooves 4 of the spacer 7 and after a tape for retentive winding is wound thereon by a taping head 19, the optical fiber cable is wound on a coiler 17. The groove pitch is determined by the revolution of the cage 22 and the take-off speed of a take-off sapstan 18. |
