| 摘要 |
PURPOSE:To provide a titled device which improves the cooling efficiency of a cooling tank behind an extruder and improves productivity by providing two sets of capstan pulleys which wind back and forth the strands plural times or above in the cooling tank and driving the pulleys with an electromagnetic clutch. CONSTITUTION:A device for producing an insulated strand is cascade-disposed with a let-off machine 1 for a core wire, a wire drawing machine 2, a softener 3 provided with the 1st and 2nd dancer rollers 24, 25, and the 1st capstan device 4, an extruder 5 for extrusion of a plastic provided with a cross head 6 for insulation covering, a cooling water tank 7, the 2nd capstan device 8, the 3rd dancer roller 26, a coiler 9, etc. The 3rd capstan device 28 consisting of two sets of capstan pulleys is disposed in said tank 7 of such device and the strand is wound back and forth plural times or above across the pulleys to improve cooling power. At least one of the above-mentioned capstan pulleys is driven to rotate at about 1.0-1.25 times the line speed of the strand via an electromagnetic clutch 35 by an independent power source 36, by which the increase in the tension on the inlet side of the device 8 is prevented and high productivity is maintained. |
