Abstract: Disclosed are metallic wire with high surface quality and low-cost suitable for use as material for grip rings and a producing method and apparatus thereof. Metallic wire 34 deformed in a coil shape is passed through a shape correction unit 14 so as to straighten it. Furthermore, while upper and lower pressing rollers 19, 20, 26, 27 prevent the metallic wire 34 from warping upwardly and downwardly, wedge-shaped grooves are continuously formed on the metallic wire 34 by means of a first cutting roller 21 and a second cutting roller 23.
Abstract: A reel 10 for metallic wire comprises a cylindrical winding drum 1, and a pair of flanges 2 provided integrally on right and left sides of the winding drum 1. A winding face 1a of the cylindrical winding drum 1 is wrapped by a cylindrical drum cover plate 5 provided with a gap a between the drum cover plate 5 and the winding face 1a and configured to cover substantially entire periphery of the winding face 1a, and the drum cover plate 5 has a discontinuous portion 6 to absorb a winding pressure applied to the drum cover plate 5.
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