Manufacture of covered electric cables

Details Manufacture of covered electric cables Manufacture of covered electric cables

B - Operations, Transporting

21

C

205/41, 205/7

B21C 23/26 (2006.01) B29C 47/28 (2006.01) H01B 13/14 (2006.01)

Patent

CA 1077889

Abstract of the Disclosure The invention concerns extrusion die sets for use in the manufacture of covered electric cables by direct extrusion of the covering material onto the cable core as it traverses orifices formed in the dies of the die sets. Pairs of dies have conventionally been employed which exhibit features conforming to traditional die design criteria such as for ensuring laminar flow of extrudate to the core to be covered, for ensuring correct sizing of die orifices and relative die orientations, etc. The invention abandons the traditionally accepted design criteria and provides die arrangements which have been found to be much simpler and less costly to manufacture, much simpler in use requiring less demanding setting-up routines, and to provide improved operational characteristics.

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