Method for the manufacture of a power cable

Details Method for the manufacture of a power cable Method for the manufacture of a power cable

1978-12-06

1980-09-02

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

174106SC, 174120SC, 264236, 264347, 425113, B29F 310

Patent

active

042206154

ABSTRACT:
A method for manufacturing a power cable wherein an inner polymeric electrically-conducting layer is extruded into surrounding relationship with respect to a conductor core element, an initially thermoplastic, heat cross-linkable polymeric layer of insulation is then extruded into surrounding relationship with respect to the conducting layer, and thereafter cross-linking is caused to occur in the layer of insulation by heating the same under pressure. The conductor element with the applied inner conducting layer is heated prior to the extrusion thereon of the insulation layer to increase the rate of production of the cable. To facilitate this heating operation, the material used for the inner polymeric conducting layer is characterized by sufficient resistance to indentation at the extrusion temperature of the insulation layer to prevent the inner electrically-conducting layer from being deformed or damaged during the extrusion thereon of the insulation layer. An outer electrically-conducting layer is applied on the insulation layer and a protective and insulating sheet of polymeric material is applied to the outer conducting layer.

REFERENCES:
patent: 3749817 (1973-07-01), Shiga et al.
patent: 3901633 (1975-08-01), Chrisman et al.
patent: 3909177 (1975-09-01), Takaoka et al.
patent: 4107245 (1978-08-01), Jansson

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