MANUFACTURING DEVICE AND MANUFACTURE OF SELF-SUPPORTING COMMUNICATION CABLE

PURPOSE:To mass-produce high quality products at a high speed by providing multiple through-holes for making a part of coating material flow on a supporting line, in front of the opening end of a core bar for the supporting line. CONSTITUTION:A core bar 3 for supporting line is provided with multiple through-holes 5, 5 that penetrate the core bar to the inside where the supporting line runs, on the outer periphery in the front of the opening end 3a. A base 4 is provided on the cross head part of an extruding machine, and a core bar 1 on the inside thereof, while the end side of the core bar 1 is forked into a core bar 2 for cable core and into the core bar 3 for supporting line, and a cable core 11 and a supporting line 12 are guided to and positioned on each of them, respectively. Seven strings of galvanized steel lines are twisted together for the supporting line 12, while multiple insulating core lines twisted together and provided with pressure winding tape on the outer periphery, are generally used as the cable core 11. The resin melted and pressurized by a screw into a coating material 13A is partially flown to the inside of the core bar 3 from the through-hole 5, and a thin film made of coating material 13A is formed on the surface of the supporting line, in front of the opening end 3a of the core bar 3. The thin film works as a kind of lubricating material.