Making of high voltage cable with thick envelope

Details Making of high voltage cable with thick envelope Making of high voltage cable with thick envelope

B - Operations, Transporting

29

F

18/753, 18/776

B29F 3/10 (1980.01)

Patent

CA 1047213

ABSTRACT OF THE DISCLOSURE Insulation is extruded onto a conductor and immediately quench-cooled to obtain solidification for retaining concentricity of conductor and envelope. The envelope is reheated under pressure to melt a surface zone, followed by gradual cooling whereby the melted zone advances into the interior. Reheating under pressure and gradual cooling. possibly also under pressure, improves texture, and provides for a more ordered crystal structure and/or fuller crosslinking. Following extrusion, and on reheating, the cable is freely suspended and assumes catenary contour while advancing to avoid sliding contact of the outer surface until adequately stabile solidification has taken place.

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