Metal band slitter device and slitting method

Patent metadata

Field	Value
Publication number	US-2018272402-A1
Application number	US-201615764156-A
Country	US
Kind code	A1
Filing date	Sep 29, 2016
Priority date	Sep 29, 2015
Publication date	Sep 27, 2018
Grant date	—

Abstract

Provided is a slitter device capable of quickly supplying metal bands to a cutter stand and cutting same into strips with high speed and accuracy. The metal band slitter device comprises an unwinder that unwinds a metal band wound into a coil, a cutter stand that cuts the unwound metal band into narrow width strips, and a winder that winds the cut metal band into coils. The metal band slitter device is configured to comprise a tension adjustment unit on the winder side between the unwinder and the cutter stand that provides a constant tension to the metal band and a tension separating unit on the cutter stand side that separates the constant tension on the input side and tension on the output side.

First claim

1 - 11 . (canceled)

12 . A metal band slitter device, comprising:
an unwinder which unwinds a metal band wound in a coil form, a cutter stand which cuts the unwound metal band into narrow width strips, and a winder which winds the cut metal bands into a coil form, the slitter device comprising a tension adjusting unit which gives a constant tension to the metal band between the unwinder and the cutter stand and on the unwinder side of these two members, and comprising, on the cutter stand side of these two members, a tension separating unit which separates the constant tension on the entering side of the metal band, and a tension of the metal band on the leaving side of the metal band from each other.

13 . The metal band slitter device according to claim 12 , wherein the surface of the roll configured in the tension adjusting unit is smoother than that of a roll configured in the tension separating unit.

14 . The metal band slitter device according to claim 12 , wherein a plurality of guide rolls are located in a path extending to a position where the metal band discharged from the tension separating unit is transported into the cutter stand.

15 . The metal band slitter device according to claim 14 , comprising, between the guide rolls and the cutter stand, a guide mechanism which guides the metal band from upper and lower directions of the metal band, and from a width direction thereof.

16 . The metal band slitter device according to claim 12 , wherein the tension separating unit is a bridle roll unit.

17 . The metal band slitter device according to claim 12 , wherein the metal band is an amorphous metal band.

18 . A metal band slitting method, using a slitter device comprising an unwinder which unwinds a metal band wound in a coil form,
a cutter stand which cuts the unwound metal band into narrow width strips, and a winder which winds the cut metal bands into a coil form, the method comprising: the step of using a tension adjusting unit located between the unwinder and the cutter stand and on the unwinder side of these two members to give a constant tension to the metal band, the step of using a tension separating unit located between the unwinder and the cutter stand and on the cutter stand side of these two members to separate the constant tension on the entering side of the metal band, and a tension of the metal band on the leaving side of the metal band from each other, and the step of attenuating the tension given to the metal band through the tension separating step, and supplying the metal band to the cutter stand.

19 . The metal band slitting method according to claim 18 , wherein a tension (Fi−Fb) of the metal band that is attenuated through the attenuation is set into a range from 0.3 to 5 MPa both inclusive.

20 . The metal band slitting method according to claim 19 , wherein in the tension adjusting step, a tension (unwinding tension Fi) given to the metal band in a longitudinal direction thereof when the metal band is discharged from the unwinder is set to 1.5 times or more the attenuated tension (Fi−Fb).

21 . The metal band slitting method according to claim 18 , wherein the metal band is an amorphous metal band having a thickness of 7 to 50 μm both inclusive, and a width of 100 to 1000 mm both inclusive.

22 . The metal band slitting method according to claim 18 , wherein the metal bands yielded by slitting the metal band through the cutter stand each have a width of 30 mm or less.

Assignees

• Hitachi Metals Ltd

Inventors

• Nishimura Ryo
• Kobayashi Katsuya
• Maeta Akihiro

Classifications

• B26D1/245

  for thin material, e.g. for sheets, strips or the like · CPC title

• B21C47/26 Primary

  Special arrangements with regard to simultaneous or subsequent treatment of the material · CPC title

• B23D19/06 Primary

  with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips · CPC title

• B65H23/1806

  in reel-to-reel type web winding and unwinding mechanism, e.g. mechanism acting on web-roll spindle · CPC title

• B21C47/003

  Regulation of tension or speed; Braking · CPC title