APPARATUS FOR MANUFACTURING CURED POLYOLEFIN-INSULATED CABLES

摘要

An apparatus for manufacturing cured polyolefin-insulated cables comprising a curable polyolefin-extruding device, a curing tube partitioned into heating and cooling zones by way of a certain partition area, for example, an area composed of a seal packing, the two zones being filled with circulating silicone oil and connected to different circulating systems, through which the polyolefin-covered cable core is drawn, and a die provided at the other end of the curing tube and connected to a supercooling device, where the pressurized oil is super-cooled to increase its density to such extent that the clearance between the outer surface of the cable core and the inner wall surface of the passage in the die is sealed.