Curing system for high voltage cross linked cables

Details Curing system for high voltage cross linked cables Curing system for high voltage cross linked cables

B - Operations, Transporting

29

C

18/1172, 18/1174

B29C 35/06 (2006.01) B29C 47/00 (2006.01)

Patent

CA 1112016

ABSTRACT OF THE DISCLOSURE This invention makes extruded, vulcanized, high voltage cables insulated with thermosetting compounds at much higher rates of production and with superior insulation of reduced thickness and with reduced cavities or voids in the insulation. As the cable comes from an extruder, it passes into a curing chamber with a heat booster that quickly raises the insulation to a temperature at which it is cured much more quickly than with steam heating of the prior art. A high temperature liquid in contact with the insulation maintains the high temperature; and because of the greater curing heat, the cable can travel through the curing chamber at a faster rate and into a cooling tube where it contacts with a cooling liquid under high pressure. The insulation compound is treated to reduce the size of cavities; and the high pressure maintained by the curing and cooling mediums prevent expansion of cavities before the insu- lation is set.

295515

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