WO2014204201A1

WO2014204201A1 - Winding device for thin film and winding method using same

Info

Publication number: WO2014204201A1
Application number: PCT/KR2014/005353
Authority: WO
Inventors: 전검배; 김광선; 박래근; 이현우; 안계운; 김영태
Original assignee: Chon Gom-Bai; Kim Kwang-Sun; Park Rae-Keun; Lee Hyun-Woo; An Kye-Un; Kim Young-Tae
Priority date: 2013-06-18
Filing date: 2014-06-18
Publication date: 2014-12-24
Also published as: TWI519463B; CN105408238B; TW201507959A; KR101501423B1; JP6263616B2; CN105408238A; KR20140146929A; JP2016526514A

Abstract

Disclosed is a winding device for a thin film and a winding method using the same. The winding device for the thin film according to the present invention includes: an un-winding part from which a thin film is un-wound; a winding part rotating to apply a winding tensile force to the thin film un-wound from the un-winding part so as to wind the thin film therearound; at least one guide roller disposed between the un-winding part and the winding part to guide the movement of the thin film while rotating in contact with the thin film; and a tensile force compensation part disposed between the un-winding part and the winding part to compensate for a tensile force of the thin film attenuated by the guide roller, wherein un-winding tensile force is applied to a section in which the thin film is un-wound from the un-winding part, a winding tensile force is applied to a section in which the thin film is wound around the winding part, and the un-winding tension force is the same as or greater than the winding tensile force.

Description

Winding device for thin film and winding method using same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin film winding apparatus and a winding method using the thin film film winding apparatus, and more particularly, to a thin film film winding apparatus and a winding method using the same.

This application claims priority based on Korean Patent Application No. 10-2013-0069916, filed on June 18, 2013, the disclosure of which is incorporated herein by reference in its entirety.

Thin films are widely used in many industrial products such as liquid crystal displays, cellular phones, and printed sheets. Such thin film films include metal foils such as electrolytic copper foils which are thin, long, continuous, easily bendable, polyester foil, and the like. Most of the thin film products are produced in the form of rolls or rolls. The winding process in which the thin film is wound in the form of a roll is necessarily accompanied by the convenience of the storage and transportation without wrinkling or damage of the thin film somewhere in the intermediate stage of the production process even in the case of the thin film product, , Which is an important process that greatly affects the quality and productivity of thin film products.

In the case of an electrolytic copper foil as a typical example of the thin film, a cathode 4 including a cathode 4 and a cathode 6, which is disposed in the electrolytic bath 6 at a predetermined interval with respect to the cathode drum 2 and the cathode drum 2, The thin film 1 which is an electrolytic copper foil is produced through a winding unit 10 such as a weaving machine and the produced thin film 1 is guided by the roller 30 and wound on the winding unit 20, Products.

The conventional winding device for winding the thin film 1 wound on the winding section 10 on the winding section 20 has the advantage that the tension for winding the thin film 1 is applied to the winding section 20 And the generated tensile force is transmitted to the winding unit 10, whereby the thin film 1 is pulled out. At least one guide roller 30 is interposed on the traveling path of the thin film 1 between the take-up unit 10 and the take-up unit 20 for smooth winding work so that the thin film 1 is wound on the take- , The guide roller 30 is essentially passed through. However, as the thin film 1 becomes thin, wrinkles may occur in the process of winding the thin film 1 on the take-up unit 10 or in contact with the guide roller 30. When such wrinkles are generated, the amount of winding of the thin film 1 wound on the winding portion 20 is reduced, which leads to a problem that the yield is deteriorated.

In order to prevent such wrinkles from occurring, it is necessary to apply a tension greater than a reference value to the thin film 1 wound on the winding portion 10. At least one guide roller 30 is interposed between the take-up unit 10 and the take-up unit 20 so that the thin film 1 passes through the guide roller 30 and tensile strength is reduced. 2, the winding tension T _w applied to the thin film 1 in the initial winding section 20 is attenuated by DELTA t _d while passing through the guide roller 30, 10) unwinding tension _(U T) to reach is that T _w _d -Δt. Unwinding tension of this volume chulbu 10 (T _U), the winding due to drop than the take-up tension (T _U) is applied at 20, the unwinding tension (T _U) is applied to the prior art, volume chulbu 10, the reference value (T _w ) higher than necessary in order to increase the winding tension (T _w ) more than necessary, and this still leaves a problem inevitably causing the occurrence of another unfavorable winding (cry).

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an apparatus and a method for securing a winding tension of a winding unit, And to provide a winding device for winding a thin film and a winding method using the winding device, which can minimize various winding failures such as warp, winding, and the like.

According to an aspect of the present invention, there is provided a winding apparatus for winding a thin film, comprising: a winding unit to which a thin film is wound; A winding section that is rotationally driven so as to apply a winding tension to the thin film wound from the winding section to wind the thin film; At least one guide roller positioned between the winding portion and the winding portion, the guide roller being rotated in contact with the thin film to guide movement of the thin film; And a tension compensating unit located between the winding unit and the winding unit and compensating for a tension of the thin film to be attenuated by the guide roller, wherein a winding tension is applied to the section where the thin film is wound from the winding unit And a winding tension is applied to a section where the thin film is wound on the winding section, and the winding tension is equal to or larger than the winding tension.

Preferably, at least two guide rollers are provided, and the tension compensating portion is positioned between the two guide rollers.

According to an aspect of the present invention, the tension compensating unit comprises at least one of the guide rollers and a drive motor for applying a rotational driving force to the guide roller.

According to another aspect of the present invention, the tension compensating unit comprises two rollers for pressing the thin film therebetween. In this case, a driving motor for applying a rotational driving force to at least one of the two rollers may be further included.

According to another aspect of the present invention, the tension compensating section is constituted by a driving roller and a driving motor for applying a rotational driving force to the driving roller. In this case, the driving roller of the tension compensating unit can be driven to rotate in the direction opposite to the guide roller.

And a nip roller provided at a position in contact with the winding part to press the thin film wound on the winding part.

Preferably, the nip roller is movable to press or release the thin film.

Preferably, the thin film is a copper foil electrolytically or rolled.

Preferably, the thin film has a width of 300 mm or more.

Preferably, the thin film has a thickness of 30 mu m or less.

According to an aspect of the present invention, there is provided a method of winding a thin film, the method comprising: (a) a step of winding a thin film wound on a winding part through at least one guide roller ; (b) the winding part is rotationally driven so as to apply a winding tension to the thin film to start winding of the thin film; (c) driving a tension compensating unit located between the winding unit and the winding unit, for compensating a tension of the thin film to be attenuated by the guide roller; And (d) a winding tension is applied to a section where the thin film is wound from the winding section, a winding tension is applied to a section where the thin film is wound at the winding section, and the winding tension is equal to or larger than the winding tension And winding the thin film so that a tensile force is applied thereto.

Preferably, in the step (d), in the course of winding the thin film on the winding part, the thin film is pressed by a nip roller provided at a position in contact with the winding part do.

The technical problem can be achieved by the thin film wound by the winding method of the thin film according to the present invention.

According to the present invention, by setting the winding tension of the winding section to be lower than the conventional one by 50% or more and securing the winding tension of the winding section to a predetermined reference value or more, a variety of variations It is possible to minimize all of the winding failure. In addition, since the nip roller provided at a position in contact with the winding section blocks the inflow of air into the thin film during the winding of the thin film on the winding section, It is possible to minimize the defects such as wind-up marks. As a result, the winding of the thin film can be increased and the yield and the yield can be improved as the winding failure is minimized and stably performed.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.

1 is a view schematically showing a method for winding an electrolytic copper foil as an example of the prior art.

Fig. 2 is a view for explaining the change in tensile force applied to the thin film of Fig. 1. Fig.

3 is a view schematically showing a configuration of a winding device for a thin film according to the present invention.

4 is a diagram showing an example of a configuration of a tension compensator according to the present invention.

5 is a view showing another example of the configuration of the tension compensator according to the present invention.

6 to 9 are views for sequentially illustrating a winding method of a thin film according to the present invention.

10 is a view schematically showing an electrolytic copper foil device to which the configuration of the thin film film winding device according to the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

4 is a view showing an example of the configuration of a tension compensating unit according to the present invention, and Fig. 5 is a view showing an example of a tension compensating unit according to the present invention, Fig. 8 is a diagram showing another example of the configuration of the compensation section.

Referring to Fig. 3, the winding device 100 for winding a thin film according to the present invention has a thin, long, continuous, and easily bendable characteristic that is rolled up in a roll form in the winding portion 110, A thin film such as a metal foil or a polyester foil is wound around the take-up part 120. In particular, a copper foil which has been electrolytically or rolled is preferably a thin film having a width of 300 mm or more and a thickness of 30 占 퐉 or less 1, a winding unit 110, a winding unit 120, at least one guide roller 130, a tension compensating unit 140, and a nip roller 150 for winding the winding unit 1.

The guide roller 130 guides the thin film 1 so that it can be wound while maintaining a predetermined tension of the thin film 1 by being rotated in contact with the thin film 1 wound on the winding part 110, At least one or more of the

windings

110 and 120 are installed at regular intervals.

The winding unit 120 has a roll structure for finally winding the thin film 1 wound up from the winding unit 110 via the guide rollers 130 so that the thin film 1 is wound with a winding tension And is rotatably driven. The winding unit 120 includes a winding roller 121 on which the thin film 1 is wound and a driving motor 125 for applying a rotational driving force to the winding roller 121. [

The winding roller 121 of the winding unit 120 has the same structure as a normal bobbin and is composed of a cylindrical body from which the thin film 1 is wound and a rotating shaft which can be supported by rotation. It is preferable that the diameter of the cylindrical body is larger than the diameter of the rotary shaft and the length of the cylindrical body is equal to or slightly longer than the width of the thin film to be wound. However, the present invention is not limited by the shape of the winding roller 121. [

The tension compensating unit 140 is disposed between the winding unit 110 and the winding unit 120 so that the at least one guide roller 130 is wound around the thin film 1 The tension of the thin film 1 before passing through the tension compensating unit 140 from the tension compensating unit 140 is applied to the tension compensating unit 140. In this case, 140 and the tension of the thin film (1) after the thin film (1). The tension compensating unit 140 may be disposed between the winding unit 110 and the guide roller 130 nearest to the winding unit 110 or between the winding unit 120 and the winding unit 120, The guide roller 130 may be located between the guide rollers 130 or when the guide roller 130 is provided with at least two guide rollers 130,

For example, the tension compensating unit 140 may include a driving motor that replaces at least one of the guide rollers 130 with a driving roller, and applies a rotational driving force to the driving roller.

As another example, the tension compensating unit 140 may include two rollers 141 and 142 for pressing the thin film 1, as shown in FIG. 4. In this case, the two rollers 141 and 142 may be constituted by a driving roller and a driving motor 145 for applying a rotational driving force to the driving roller. According to this configuration, as the two rollers 141 and 142 are rotationally driven while pressing the thin film 1, a separate winding tension is applied separately from the winding tension applied to the thin film 1 in the winding portion 120 The tension of the thin film 1 can be compensated.

5, the tension compensating unit 140 may include a driving roller 143 and a driving motor 145 for applying a rotational driving force to the driving roller 143. [ 5, the driving roller 143 may be disposed at a lower position than the guide roller 130, or may be disposed at a higher position than the guide roller 130 (not shown in the drawing) The driving roller 143 can be rotated in a direction opposite to the guide roller 130 so that the driving roller 143 can be rotated in the opposite direction to the driving roller 143 An additional winding tension is applied to the thin film 1 to compensate for the tension reduction of the thin film 1 by the guide roller 130. [

Although the tension compensating unit 140 includes the

rollers

141, 142 and 143 and the drive motor 145 in the above-described embodiment, the tension compensating unit 140 of the present invention is not limited thereto. The tension compensating unit 140 may be formed of a stopper structure that can be in contact with the thin film film 1 to control the tension thereof. The tensile force of the thin film 1 may be equal to or greater than the tensile force of the thin film 1 after the tension of the thin film 1 has passed through the tension compensating part 140.

The thin film film winding apparatus 100 according to the present invention is configured such that at least one guide roller 130 between the winding unit 110 and the winding unit 120 is wound around the thin film 1, The tension compensating unit 140 is configured to compensate the tension of the film 1 and the tension of the thin film 1 before passing through the tension compensating unit 140 from the tension compensating unit 140 The tension applied to the thin film 1 is equal to or greater than the tension of the thin film 1 after passing through the tension compensating part 140 so that the thin film 1 is wound.

Specifically, in the winding device 100 of the thin film, a winding tension is applied to a section where the thin film 1 is unwound from the winding section 110, and the thin film 1 is wound around the winding section 120 The winding tension is applied so that the winding tension is equal to or larger than the winding tension. This is possible by providing the tension compensating part 140 between the winding part 110 and the winding part 120. At least one guide roller 130 is provided between the winding part 110 and the winding part 120 And the tension reduction by the guide roller 130 can be compensated by the tension compensating section 140 so that the winding tension is controlled to be in the range of 2% to 100% of the winding tension .

With this configuration, the thin film film winding apparatus 100 according to the present invention can be applied to a case where the tension transmitted from the winding unit 120 is not sufficient in the conventional process of winding the thin film 1 at the winding unit 110 It is possible to minimize the occurrence of wrinkles which may occur in the case where the winding film 120 is wound in a winding direction and also to cause an excessive tension that may cause deformation of the thin film 1 during winding of the thin film 1 on the winding portion 120 It is possible to minimize the occurrence of a wrap (i.e., crying) which may be caused by being wound. This is because when the thin film 1 is unwound from the winding unit 110, an appropriate unwinding tension is applied so that wrinkles are not generated in the thin film 1 wound on the winding unit 120, 1) is applied, it is possible to simultaneously improve the problems of wrinkles and wounds (crying), which are caused by high tensile force and storage force, which are opposite to each other, do.

The nip roller 150 is provided at a position where the nip roller 150 is in contact with the winding unit 120 and is for pressing the thin film 1 wound on the winding unit 120. The nip roller 150 is a thin film 1 so as to be able to be pressed or released. The nip roller 150 serves to improve the winding track that may be generated during the winding of the thin film 1 on the winding unit 120. This can prevent the inflow of air into the inside of the thin film 1 during the winding of the thin film 1 on the winding part 120 through the structure of the nip roller 150, do.

6 to 9, a method for winding a thin film according to the present invention is a method for winding a thin film 1 wound on a winding part 110 through at least one guide roller 130 to a winding part 120 (110) and the thin film (1); and a step of rotating the thin film (1) so as to apply a winding tension to the thin film (1) A step of driving a tension compensating unit 140 positioned between the winding units 120 to compensate the tension of the thin film 1 attenuated by the guide roller 130; The tension of the thin film 1 before passing through the tension compensating unit 140 is equal to or greater than the tension of the thin film 1 after passing through the tension compensating unit 140 And winding the thin film (1).

6, the thin film 1 wound up by the winding unit 110 is coupled to the winding unit 120 via at least one guide roller 130 and the tension compensating unit 140, And the winding section 120 is rotationally driven to start winding of the thin film 1 so as to apply a winding tension to the thin film 1. At this time, the winding section 120 is rotated by an initial winding tension (T _W1 ) so that the thin film 1 can be stably wound into the winding section 110, T _U1 ) is transmitted. That is, the initial unwinding tension T _U1 is T _U1 < T _W1 due to the tension reduction by the guide roller 130.

Then, as shown in FIG. 7, the tension compensating unit 140 is driven to apply additional winding tension to the thin film 1. At this time, the tension compensating unit 140 may be configured such that the thin film 1 can be more stably wound from the winding unit 110, and the thin film 1 can be wound on the thin film 1 before passing through the tension compensating unit 140, The tensile force of the film 1 is compensated for so as to be equal to or more than the tensile force of the thin film 1 after passing through the tension compensating section 140 to increase the tension on the side of the take- And the appropriate unwinding tension T _U2 is applied.

8, in a state in which the appropriate winding tension T _U2 is applied to the winding unit 110 by driving the tension compensating unit 140, the winding unit 120 An appropriate winding tension T _W2 is applied so as not to cause a wrinkle on the thin film 1 at an initial winding tension T _W1 within a range in which the winding process of the thin film 1 can be stably performed The rotational driving force is gradually reduced so as to be rotationally driven.

9, an appropriate unwinding tension T _U2 is applied to a section where the thin film 1 is unwound from the winding section 110, and the thin film 1 is wound on the winding section 120, The appropriate winding tension T _W2 is applied to the winding section and the appropriate winding tension T _U2 is applied equal to or more than the appropriate winding tension T _W2 so that winding of the thin film 1 . That is, the appropriate winding tension T _U2 is T _U2 ? T _W2 by the tension compensation by the tension compensating unit 140. At this time, it is preferable that the proper winding tension (T _W2 ) is controlled within a range of 2% to 100% of the optimum winding tension (T _U2 ). The thin film 1 may be pressed by the nip roller 150 provided at a position where the thin film 1 can contact the winding unit 120, .

10, the winding device 100 for winding a thin film according to the present invention comprises a winding unit 110, that is, a copper foil 1 which is electrodeposited on a negative electrode drum of a former machine, It can be applied to the equipment to be taken. In this case, the thin film is not pulled out from the winding unit 110 in a state where the thin film is wound in the roll-up state in the winding unit 110, but the thin film is not peeled off from the winding unit 110, And is substantially the same as the winding device of the thin film.

As described above, the winding device 100 for a thin film according to the present invention can be applied to a process for winding an electrolytic copper foil having a width of 300 mm or more and a thickness of 30 占 퐉 or less, among the electrolytic copper foils continuously produced from the deposition stage The copper foil 1 can be stably peeled in the section where the electrodeposited copper foil 1 is pulled out from the forming machine 110 and is applied with a proper pulling tension so as not to cause wrinkles on the peeled copper foil 1 The copper foil 1 is applied with the appropriate winding tension so as not to cause a deformation in the section where the copper foil 1 is wound on the winding section 120 so as to prevent the occurrence of deformation, It is possible to simultaneously improve the problems of wrinkles and wounds (crying) caused by the storage force. In addition, the nip roller 150 can prevent the air from flowing into the inside of the copper foil 1 during the winding of the copper foil 1 on the winding portion 120, . Further, since the winding device 100 of the thin film film according to the present invention can stably wind the copper foil 1, the winding amount of the copper foil 1 that can be wound on the winding part 120 can be increased It has the advantage of being able to realize a long-term facility.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

Claims

In a winding device for winding a thin film,

A winding part from which the thin film is wound;

A winding section that is rotationally driven so as to apply a winding tension to the thin film wound from the winding section to wind the thin film;

At least one guide roller positioned between the winding portion and the winding portion, the guide roller being rotated in contact with the thin film to guide movement of the thin film; And

And a tension compensating part located between the winding part and the winding part and compensating a tension of the thin film to be attenuated by the guide roller,

A winding tension is applied to a section where the thin film is wound from the winding section,

A winding tension is applied to a section where the thin film is wound on the winding section,

Wherein the winding tension is equal to or larger than the winding tension.
The method according to claim 1,

The guide roller is provided at least two or more,

Wherein the tension compensating section is located between the two guide rollers.
3. The method according to claim 1 or 2,

Wherein the tension compensating unit comprises at least one of the guide rollers and a drive motor for applying a rotational driving force to the guide rollers.
3. The method according to claim 1 or 2,

And the tension compensating section comprises two rollers for pressing the thin film therebetween.
5. The method of claim 4,

Wherein the tension compensating unit further comprises a driving motor for applying a rotational driving force to at least one of the two rollers.
3. The method according to claim 1 or 2,

Wherein the tension compensating unit comprises a driving roller and a driving motor for applying a rotational driving force to the driving roller.
The method according to claim 6,

Wherein the driving roller of the tension compensating unit is rotationally driven in a direction opposite to the guide roller.
The method according to claim 1,

And a nip roller provided at a position in contact with the winding part and pressing the thin film wound on the winding part.
9. The method of claim 8,

Wherein the nip roller is movable so as to press or release the thin film.
The method according to claim 1,

Wherein the thin film is a copper foil electrolytically or rolled.
11. The method of claim 10,

Wherein the thin film has a width of 300 mm or more.
11. The method of claim 10,

Wherein the thin film has a thickness of 30 mu m or less.
In a winding method for winding a thin film,

(a) coupling the thin film wound on the winding part to the winding part via at least one guide roller;

(b) the winding part is rotationally driven so as to apply a winding tension to the thin film to start winding of the thin film;

(c) driving a tension compensating unit located between the winding unit and the winding unit, for compensating a tension of the thin film to be attenuated by the guide roller; And

(d) a winding tension is applied to a section where the thin film is wound from the winding section, a winding tension is applied to a section where the thin film is wound at the winding section, and the winding tension is equal to or greater than the winding tension And winding the thin film so as to apply the thin film.
14. The method of claim 13,

In the step (d)

Wherein the thin film is pressed by a nip roller provided at a position where the thin film is in contact with the winding part in the course of winding the thin film on the winding part .
14. The method of claim 13,

Wherein the thin film is a copper foil which is electrolytically or rolled.
16. The method of claim 15,

Wherein the thin film has a width of 300 mm or more.
16. The method of claim 15,

Wherein the thin film has a thickness of 30 mu m or less.
17. A thin film wound by a method according to any one of claims 13 to 17.