| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape wire drawing die by which a drawing resistance is reduced at the time of the shape wire drawing process in the manufacture of a contact wire. SOLUTION: In the shape wire drawing die 2 for forming a groove 11 along the longitudinal direction as well as reducing a diameter of a roughed-down wire 1 to manufacture the contact wire, the shape wire drawing die 2 has a structure to start a diameter-reducing work before a work for forming the groove 11 is started, and preferably, the shape wire drawing die 2 is provided with a groove forming commencement portion for starting the work for forming the groove 11 in the downstream of a diameter reducing work commencement portion for starting the diameter reducing work. COPYRIGHT: (C)2004,JPO
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