Manufacture of electric cables.

摘要

A process for manufacturing electric cable of the type comprising one or more conductors embedded in a sheath of dielectric material, wherein the dielectric material is provided with continuous air spaces or cells extending along the length of the cable, comprises first embedding the conductor or conductors (1) in a sheath of dielectric material (6) comprising a central core (7) with a plurality of radial ribs (8) extending longitudinally of the core along the whole length thereof and then forming a tube (9) of dielectric material (10) over the thus embedded conductor or conductors (1) such that the tube contacts the outer ends of the ribs (8).