Title:
METAL STRIP COIL AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/062375
Kind Code:
A1
Abstract:
Provided is a metal strip coil in which coil end shape defects can be suppressed. Provided is a metal strip coil obtained by winding a metal strip around a winding core, said metal strip coil characterized in that: the metal strip is wound by repeating multiple times a process of winding the strip from a first end of the winding core toward a second end thereof, folding the strip back at the second end, winding the strip from the second end of the winding core toward the first end thereof, and folding the strip back at the first end; the metal strip comprises folded-back parts that are wound in a direction orthogonal to the axial direction of the winding core where the strip is folded back; the folded-back parts, as seen when the metal strip coil is viewed from the side, have the shape of arcs and are formed in multiple stages from the inner circumference toward the outer circumference, and are formed so that lines connecting the center points and centers of the arcs rotate stepwise in one direction in the order of the arc-shaped folding parts formed in multiple stages from the inner circumference toward the outer circumference.
Inventors:
NGUEN THANH-NGHIA (JP)
OKAMOTO TAKUYA (JP)
FUKADA SHINICHIRO (JP)
OKAMOTO TAKUYA (JP)
FUKADA SHINICHIRO (JP)
Application Number:
PCT/JP2017/035185
Publication Date:
April 05, 2018
Filing Date:
September 28, 2017
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B21C47/02; B65H54/02; B65H54/28; C22C38/00; C22C38/18; C22C38/22
Domestic Patent References:
| WO1995013237A1 | 1995-05-18 |
Foreign References:
| JPH09300018A | 1997-11-25 | |||
| JP2009166991A | 2009-07-30 | |||
| JP2008100770A | 2008-05-01 | |||
| JPH06312878A | 1994-11-08 | |||
| JP2009018911A | 2009-01-29 | |||
| US4093146A | 1978-06-06 | |||
| JPH03133878A | 1991-06-07 |
Other References:
See also references of EP 3521223A4
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