| 摘要 |
PURPOSE:To produce a synthetic resin spacer for optical fiber cable with high efficiency, by turning within a horizontal plane a nozzle piercing through a tension member and having pleat type projections on the inner circumferential surface and then extruding the molten resin while pulling the center of an approximated guide cylinder toward the tension member. CONSTITUTION:A head shaft 28 is held rotatably within a die head 20, and a circumferential hole 30 is provided at the center of the shaft 28. The hole 30 is communicated to a resin inflow path 26 in the direction rectangular to the hole 30. The resin is extruded to a nozzle holding part 46 through a path 34. A tension member 40 is communicated to an outlet through a guide hole 38. A nozzle 48 and a guide cylinder 58 are inserted to the part 46 and then tightened with a nozzle nut 42. Then a pulley 47 is rotated by a belt (not shown in the figure). Then heated and molten resin is fed forcibly while the member 40 is pulled, and the shaft 28 and the nozzle 48 are rotated. The resin is drawn out and cooled to be taken up to a reel 82. In such a way, a spacer having high precision is produced easily. |
