Apparatus for manufacturing polyolefin-insulated cables

摘要

An apparatus for manufacturing hardened polyolefin-insulated cables comprising a hardenable polyolefin-extruding device, a 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 filed with circulating silicone oil and constituted of 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 super-cooling 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.