METHOD FOR MANUFACTURING ELECTRIC WIRE

WIPO Patent Application WO/2010/137700

A1

Disclosed is a method for manufacturing an electric wire, which can economically manufacture the wire having an air gap formed stably for an insulator covering a conductor and exhibiting good transmission efficiency. The circumference of a central conductor (12) that is drawn out from an insertion hole (44) formed in the center of a point (41) is covered with an insulator (13) consisting of resin (R) by extruding the resin (R) to annular extrusion channels (51, 52) consisting of the gap between a die (31) having a truncated conical inner circumferential surface (32) and the point (41) having a truncated conical outer circumferential surface (42) thus manufacturing an electric wire (11). Three or more tubular bodies (45) extending through the extrusion channels (51, 52) along the extrusion direction are provided on the outer circumferential surface (42) of the point (41) at equally-spaced intervals in the circumferential direction, and the resin (R) is extruded to the extrusion channels (51, 52) thus forming a plurality of air gaps (14) in the resin (R) continuously in the longitudinal direction, at intervals in the circumferential direction, by the air flowing from the tubular bodies (45).

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JP2018133162	CABLE MANUFACTURING APPARATUS
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HAYASHISHITA TATSUNORI (JP)
TAKAHASHI HIROKAZU (JP)
NIWATA MASAMICHI (JP)

PCT/JP2010/059130

December 02, 2010

May 28, 2010

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SUMITOMO ELECTRIC INDUSTRIES (JP)
HAYASHISHITA TATSUNORI (JP)
TAKAHASHI HIROKAZU (JP)
NIWATA MASAMICHI (JP)

H01B13/14; B29C48/32; H01B13/016; H01B13/24

JPH06150729A	1994-05-31
JPH10116527A	1998-05-06
JP2008243720A	2008-10-09
JP2010086950A	2010-04-15

NAITO TERUO (JP)
Teruo Naito (JP)

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