| 摘要 |
<p>A coil for erecting cable comprises a coil body (1) formed of a metal wire (2) and of a coated layer (3) of synthetic resin mixed with inorganic powder disposed on the outer circumference of said metal wire (2), wherein said coil body (1) is provided at the outer circumference with spiral torsion portion (6) formed by applying torsion along the longitudinal direction to the cable body (1). A method for manufacturing the coil for erecting cable comprises steps of supplying the metal wire (2) to a mold die (11), extruding synthetic resin mixed with inorganic powder by a first extrusion molding machine (10) on the outer circumference of the metal wire (2) in said mold die (11) to form the coated layer (3) on the metal wire (2), supplying the coil body (1) having the coated layer (3) from the mold die (11) to a sizing die (12), and forming the spiral torsion portion (6) formed by applying torsion along the longitudinal direction to the coil body (1) on the outer circumference of the coil body (1) in the sizing die (12).</p> |
