INSULATED CONNECTION METHOD FOR CV CABLE

摘要

PROBLEM TO BE SOLVED: To provide an insulated connecting method for CV cable, which utilizes unique semiconducting layer formed body, for greatly reducing producing process time by unifying the processes, from extruding to cross-linking and causes no residual voids to be produced inside polyethylene containing an extruded cross-linking agent. SOLUTION: Porous conical pipe-shaped semiconducting layer formed bodies 17, through which a gas is able to pass in thickness direction are inserted in advance to both CV cables 1A, 1B respectively, these semiconducting layer formed bodies 17 are adhered tightly and fixed to a external semiconducting layer 2 of the CV cables 1A, 1B at an end side, where the diameter is reduced and both of the end sides of enlarged diameter are separated and set to face each other, dies 20 are set via a breathing layer 18 of mesh construction and an elastic cylindrical diaphragm 19 from the outer side of semiconducting formed body 17, a reinforcing insulating body 10 and the separating portion are formed into a single united body by filling the inside of semiconducting layer formed body 17 and separation setting portion with polyethylene resin containing a cross-linking agent extruded to the dies 20 in a preheating state, and cross-linking is performed for reinforcing insulation body 10 and separating portion by heating and raising the temperature for a dies 20, while uniformly pressuring from the whole outer surface of the elastic cylindrical diaphragm 19, without giving cooling processes in succession.