| 摘要 |
A four layer multi-strand unilay cable of nominally 61 strands is formed without the aid of roll forming drives but rather by reliance on the tension in the strands provided by a pair of drive capstans carried in a single twist cage. The area reduction of the cable in the various roll forming stages is less than about 15 or 16 %, and may be in the range of about 12 - 14 %. The area reduction is greater than 10 %. The process is fed by stationary reels, and the feedstock may be replenished by splicing subsequent stock into the tail end of the stock of the preceding reel without having to cease production. The output reel may be greater than 76 inches in diameter, and may be 84 or 96 inches in some cases . The line does not employ the large number of roll forming drives and drive metering device s that would be used if all stations were actively driven. The cables so produced are twisted together under tension, and the elements of those cables may tend to bind against eac h other when formed and twisted. The copper or aluminum cables so formed may then be coat ed in a plastic dielectric coating.
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