MANUFACTURE OF FOAM INSULATION CONDUCTOR

摘要

PURPOSE:To stably manufacture a highly formed insulation conductor by controlling the external pressure in foaming. CONSTITUTION:Foam resin 12 is extruded and spread on a core wire 14 in a cross head 16. A closed pressure case 20 installed to a die presser 42 by a fixing bolt 44, and foam resin cable 24 starting foaming is sent through the case 20. The pressure inside the case 20 is set at a value exceeding the atmospheric pressure, and it is controlled by a pressure regulation unit 52. Inside the case 20 is provided a movable cooling water tank 18 which moves corresponding to an electrostatic capacity of the foam resin 12, and the foam resin cable 24 is cooled by this movable cooling water tank 18.