Metal band slitter device and slitting method

Patent metadata

Field	Value
Publication number	US-11014134-B2
Application number	US-201615764156-A
Country	US
Kind code	B2
Filing date	Sep 29, 2016
Priority date	Sep 29, 2015
Publication date	May 25, 2021
Grant date	May 25, 2021

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

The invention claimed is:

1. A metal band slitter device, comprising:
an unwinder which unwinds a metal band wound in a coil form,
a tension adjusting unit,
a tension separating unit,
a cutter stand which cuts the unwound metal band into a plurality of narrow width strips, and
a winder which winds each strip into a coil form,
wherein the tension adjusting unit and the tension separating unit are located between the unwinder and the cutter stand,
wherein the tension adjusting unit is located between the unwinder and the tension separating unit,
wherein the tension separating unit is located between the tension adjusting unit and the cutter stand,
wherein the tension adjusting unit controlled together with the unwinder gives a constant tension to the metal band between the unwinder and the tension adjusting unit, and
wherein the tension separating unit changes the constant tension of the metal band entering the tension separating unit to a tension of the metal band leaving the tension separating unit, wherein the tension of the metal band leaving the tension separating unit is a tension smaller than the constant tension of the metal band entering the tension separating unit.

2. The metal band slitter device according to claim 1 , wherein a surface of a roll configured in the tension adjusting unit is smoother than that of a roll configured in the tension separating unit.

3. The metal band slitter device according to claim 1 , wherein the metal band slitter device further comprises a plurality of guide rolls, and the 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.

4. The metal band slitter device according to claim 3 , further compromising, between the guide rolls and the cutter stand, a guide mechanism which guides the metal band by guiding from upper and lower directions of the metal band, and from a width direction of the metal band.

5. The metal band slitter device according to claim 1 , wherein the tension separating unit is a bridle roll unit.

6. The metal band slitter device according to claim 1 , wherein the metal band is an amorphous metal band.

7. The metal band slitter device according to claim 1 , wherein the cutter stand comprises rotating blades at predetermined intervals, wherein the predetermined intervals are 30 mm or less.

8. The metal band slitter device according to claim 1 , wherein the tension adjusting unit is directly downstream from the unwinder.

9. A metal band slitting method, using a slitter device comprising
an unwinder,
a tension adjusting unit,
a tension separating unit,
a cutter stand, and
a winder,
wherein the tension adjusting unit and the tension separating unit are located between the unwinder and the cutter stand,
wherein the tension adjusting unit is located between the unwinder and the tension separating unit,
wherein the tension separating unit is located between the tension adjusting unit and the cutter stand,
the method comprising:
a step of unwinding a metal band wound on the winder,
a step of applying a constant tension to the metal band by controlling the tension adjusting unit together with the unwinder,
a step of adjusting the constant tension of the metal band with the tension separating unit to change the constant tension of the metal band entering the tension separating unit to a tension of the metal band leaving the tension separating unit, wherein the tension of the metal band leaving the tension separating unit is a separate tension from the constant tension of the metal band entering the tension separating unit,
a step of attenuating the tension given to the metal band through the tension separating step, and supplying the metal band to the cutter stand,
a step of cutting the unwound band into a plurality of narrow width strips, and
a step of winding each strip into a coil form.

10. The metal band slitting method according to claim 9 , wherein a tension (Fi−Fb) of the metal band that is attenuated through the attenuation is set into a range which is greater than or equal to 0.3 and less than or equal to 5 MPa.

11. The metal band slitting method according to claim 10 , wherein in the tension adjusting step, a tension which is unwinding tension Fi applied to the metal band in a longitudinal direction of the metal band when the metal band is discharged from the unwinder is set to 1.5 times or more the attenuated tension (Fi−Fb).

12. The metal band slitting method according to claim 9 , wherein the metal band is an amorphous metal band having a thickness of greater than or equal to 7 and less than or equal to 50 μm, and a width of greater than or equal to 100 and less than or equal to 1000 mm.

13. The metal band slitting method according to claim 9 , wherein strips yielded by cutting 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

• B23D19/06 Primary

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

• B65H2301/3112

  S-shaped · CPC title

• B65H35/00

  Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers (cutting or perforating machines or devices in general B26D, B26F) · CPC title

• B26D7/32

  for conveying or stacking cut product (means for removing cut-out material or waste B26D7/18) · CPC title

• B65H23/1806

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