JP6263616B2 - Thin film film winding device and winding method using the same - Google Patents

Description

The present invention relates to a thin film film winding device and a winding method using the same, and more particularly to a thin film film winding device capable of minimizing winding defects 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, and all the contents disclosed in the specification and drawings of the corresponding application are incorporated in this application. The

Thin film is widely used in many industrial products such as liquid crystal displays, mobile phones and printed sheets. Examples of such a thin film include metal foil and polyester foil such as electrolytic copper foil that are thin, continuous, and easy to bend. Most thin film products are produced in the form of a roll, that is, a roll. Is done. The winding process in which such a thin film is wound in the form of a roll can be stored and transported without any wrinkles or damage of the thin film at a certain stage of the production process, even in the case of a thin film product whose final shape is not a roll. It is an important process that is always accompanied for convenience and has a great influence on the quality and productivity of thin film products.

In the case of electrolytic copper foil as a typical example of the thin film, as shown in FIG. 1, the negative electrode drum 2 and the positive electrode 4 that is immersed in the electrolytic cell 6 with a predetermined distance from the negative electrode drum 2. The thin film 1 which is an electrolytic copper foil is produced by the unwinding unit 10 such as a thin film manufacturing apparatus including the following. The produced thin film 1 is guided by the roller 30 and wound around the winding unit 20. Shipped as a roll product.

Thus, in the conventional winding device that winds the thin film 1 unwound from the unwinding unit 10 around the winding unit 20, the tension for winding the thin film 1 is generated by the rotational drive of the winding unit 20. Then, the generated tension is transmitted to the unwinding unit 10 so that the thin film 1 is unwound. Further, for smooth winding operation, at least one guide roller 30 is interposed on the traveling path of the thin film 1 between the unwinding unit 10 and the winding unit 20 so that the thin film 1 is Before being wound around the winding unit 20, the guide roller 30 must be passed. However, as such a thin film 1 becomes ultrathin, wrinkles may occur in the process in which the thin film 1 is unwound at the unwinding unit 10 or in the process of running in contact with the guide roller 30. If such wrinkles occur, there is a problem in that the amount of the thin film 1 wound around the winding portion 20 is reduced, thereby reducing the yield.

In order to prevent the occurrence of such wrinkles, it is necessary to apply a tension higher than the reference value to the thin film 1 unwound from the unwinding portion 10. However, at least one guide roller 30 is interposed between the unwinding unit 10 and the winding unit 20, and the tension is attenuated in the process in which the thin film 1 passes through the guide roller 30. That is, as shown in FIG. 2, the winding tension Tw initially applied to the thin film 1 by the winding section 20 is attenuated by about Δtd as it passes through the guide roller 30, and the unwinding section 10 The unwinding tension Tu reached reaches Tw−Δtd. Thus, since the unwinding tension Tu of the unwinding part 10 is lower than the unwinding tension Tw applied from the winding part 20, conventionally, the unwinding tension Tu applied to the unwinding part 10 is made higher than the reference value. For this reason, there has been a difficulty that the winding tension Tw must be increased more than necessary, but this still remains as a problem that the occurrence of bumping, which is another winding defect, cannot be avoided. Yes.

The present invention has been made in view of the above problems, and by setting the winding tension of the winding unit lower than before, the winding tension in the winding unit is ensured to be equal to or higher than a predetermined reference value. And a thin film film winding device capable of minimizing all of various winding failures such as wrinkles, wobbling, winding traces, etc., and a winding method using the same Objective.

In order to achieve the above object, a thin film film winding device according to the present invention is a winding device for winding a thin film, wherein the thin film film is unwound from the unwinding portion; A winding unit that is driven to rotate and winds the thin film so that a winding tension can be applied to the film; positioned between the unwinding unit and the winding unit, and rotates while being in contact with the thin film. At least one guide roller for guiding the movement of the film; and a tension compensator located between the unwinding unit and the winding unit and for compensating for the tension of the thin film attenuated by the guide roller; Unwinding tension is applied to the section where the thin film is unwound from the unwinding section, and winding is performed to the section where the thin film is wound on the winding section. Tension is applied, the unwinding tension and wherein the same or larger than that of the winding tension.

Preferably, at least two guide rollers are provided, and the tension compensator is located between the two guide rollers.

The tension compensation unit may include at least one of the guide rollers and a driving motor that applies a rotational driving force to the guide rollers.

According to an embodiment of the present invention, the tension compensator is composed of two rollers that press against the thin film. In this case, a driving motor that applies a rotational driving force to at least one of the two rollers may be further included.

According to an embodiment of the present invention, the tension compensation unit includes a driving roller and a driving motor that applies a rotational driving force to the driving roller. In this case, the driving roller of the tension compensation unit may be rotationally driven in the opposite direction to the guide roller.

Preferably, the thin film film winding device further includes a nip (Nip) roller that is provided at a position where the thin film film can come into contact with the winding unit and compresses the thin film wound on the winding unit.

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

Preferably, the thin film is a copper foil that has been electrolytically processed or rolled.

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

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

The method for winding a thin film according to the present invention for achieving the above technical problem is as follows: (a) at least one thin film unwound from the unwinding portion in the winding method for winding the thin film. (B) a step of starting the winding of the thin film by rotating the winding unit so as to apply a winding tension to the thin film; ) Driving a tension compensation unit positioned between the unwinding unit and the winding unit and compensating for the tension of the thin film that is attenuated by the guide roller; and (d) the thin film from the unwinding unit. Unwinding tension is applied to the section where the film is unwound, winding tension is applied to the section where the thin film is wound at the winding section, and the unwinding tension is compared with the winding tension. Characterized in that it comprises a; Te is applied so that the same or greater stage of winding the thin film.

Preferably, in the step (d), in the process of winding the thin film on the winding unit, the thin film is pressed by a nip roller provided at a position where the thin film can come into contact with the winding unit; Is further included.

Said technical subject can be achieved by the thin film wound up with the winding method of the thin film by this invention.

According to the present invention, the process of winding the thin film by securing the unwinding tension of the unwinding portion to a predetermined reference value or more while setting the unwinding tension of the unwinding portion 50% or more lower than the conventional one. It is possible to minimize all the various winding defects such as wrinkles, swells, etc. In addition, the nip roller provided at a position where it can come into contact with the winding unit blocks the air from flowing into the inside of the thin film in the process of winding the thin film on the winding unit. It is possible to minimize defects such as winding traces that may occur due to deformation of the thin film caused by. As a result, the winding defect is minimized, and the winding of the thin film is stably performed, so that the winding amount of the thin film to be wound can be increased, thereby improving the winding distance and the yield. Can do.

The following drawings attached to the specification illustrate preferred embodiments of the present invention, and together with the detailed description, serve to further understand the technical idea of the present invention. It should not be construed as being limited to the matters described in the drawings.

It is the schematic which showed the winding method of the electrolytic copper foil as an example of a prior art. It is drawing shown in order to demonstrate the change of the tension | tensile_strength applied to the thin film of FIG. It is the schematic which showed the structure of the winding apparatus of the thin film by this invention. It is the figure which showed an example of the structure of the tension compensation part by this invention. It is the figure which showed the other example of the structure of the tension compensation part by this invention. 1 is a view illustrating a method for winding a thin film according to the present invention in order. 1 is a view illustrating a method for winding a thin film according to the present invention in order. 1 is a view illustrating a method for winding a thin film according to the present invention in order. 1 is a view illustrating a method for winding a thin film according to the present invention in order. It is the schematic which showed the electrolytic copper foil installation with which the structure of the winding apparatus of the thin film film by this invention was applied.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and claims should not be construed to be limited to ordinary or lexicographic meanings, and the inventor himself should explain the invention in the best possible manner. It must be interpreted with the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that the term concept can be appropriately defined. Therefore, the configuration described in the embodiments and drawings described in this specification is only the most preferable embodiment of the present invention, and does not represent all of the technical idea of the present invention. It should be understood that there are various equivalents and variations that can be substituted at the time of filing.

FIG. 3 is a schematic view showing a configuration of a thin film film winding device according to the present invention, FIG. 4 is a diagram showing an example of a configuration of a tension compensating unit according to the present invention, and FIG. 5 is a tension compensation according to the present invention. It is drawing which showed the other example of the structure of a part.

Referring to FIG. 3, a thin film film winding apparatus 100 according to the present invention is thin, continuous, and easily bent, wound in a roll form or continuously produced on an unwinding unit 110. For winding a thin film such as a metal foil or a polyester foil having characteristics on the winding portion 120, the width is 300 mm or more, particularly in the electrolytically processed or rolled copper foil. In order to wind up the thin film 1 having a thickness of 30 μm or less, an unwinding unit 110, a winding unit 120, at least one guide roller 130, a tension compensating unit 140, and a nip roller 150 are included.

The guide roller 130 is for guiding the thin film 1 so that the thin film 1 is wound while maintaining a predetermined tension by rotating while contacting the thin film 1 unwound from the unwinding section 110. In addition, at least one or more is provided between the unwinding unit 110 and the winding unit 120 at a constant interval.

The winding unit 120 has a roll structure for finally winding the thin film 1 unwound from the unwinding unit 110 after passing through the guide roller 130, and is wound on the thin film 1. It is rotationally driven so that tension can be applied. The winding unit 120 includes a winding roller 121 on which the thin film 1 is wound, and a driving motor 125 that applies a rotational driving force to the winding roller 121.

The winding roller 121 of the winding unit 120 has a structure similar to that of a normal bobbin, and includes a cylindrical body on which the thin film 1 is wound and a rotating shaft supported by rotation. The diameter of the cylindrical body is formed larger than the diameter of the rotating shaft, and the length of the cylindrical body is preferably the same as or slightly longer than the width of the thin film 1 to be wound. However, the present invention is not limited by the form of the winding roller 121.

The tension compensation unit 140 is positioned between the unwinding unit 110 and the winding unit 120, and the tension of the thin film 1 that attenuates as the thin film 1 passes through the at least one guide roller 130. In the configuration, the tension of the thin film 1 before passing through the tension compensation unit 140 from the tension compensation unit 140 as a base point is after the tension compensation unit 140 has passed through the tension compensation unit 140. It is applied so as to be equal to or higher than the tension of the thin film 1. In addition, the tension compensation unit 140 is positioned between the unwinding unit 110 and the guide roller 130 closest to the unwinding unit 110 or is most adjacent to the winding unit 120 and the unwinding unit 120. If at least two or more guide rollers 130 are provided, the guide rollers 130 may be positioned between them, and at least one guide roller 130 may be provided.

For example, the tension compensator 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, as shown in FIG. 4, the tension compensator 140 may include two rollers 141 and 142 that compress the thin film 1. In this case, the tension compensator 140 may include two rollers 141 and 142. One or two of the rollers may be configured as a driving roller, and may be configured by a driving motor 145 that applies a rotational driving force to the driving roller. According to such a configuration, not only the winding tension applied from the winding unit 120 to the thin film 1 but also the two rollers 141 and 142 are rotated while pressing the thin film 1, The tension of the thin film 1 can be compensated by applying a further winding tension.

As another example, the tension compensator 140 may include a driving roller 143 and a driving motor 145 that applies a rotational driving force to the driving roller 143, as shown in FIG. According to such a configuration, the driving roller 143 is disposed at a position lower than the guide roller 130 as in the case of FIG. 5 or, although not shown, at a position higher than the guide roller 130. Since the driving roller 143 is rotationally driven in a direction opposite to the guide roller 130 by being arranged, not only the winding tension applied to the thin film 1 from the winding unit 120 but also the driving roller 143 Further winding tension is applied to the thin film 1 to compensate for attenuation of the tension of the thin film 1 by the guide roller 130.

In the above-described embodiment, the tension compensator 140 includes rollers 141, 142, and 143 and a drive motor 145. However, the tension compensator 140 of the present invention is not limited to these, and the thin film A stopper structure that can control the tension by surface contact with the film 1 may be configured, and the tension of the thin film 1 before passing through the tension compensator 140 with the tension compensator 140 as a base point. However, any means that can be applied so as to be equal to or higher than the tension of the thin film 1 after passing through the tension compensator 140 may be used.

As described above, the thin film film winding device 100 according to the present invention attenuates as the thin film 1 passes through at least one guide roller 130 between the unwinding section 110 and the winding section 120. The tension compensator 140 that compensates the tension of 1 is configured, and the tension of the thin film 1 before passing through the tension compensator 140 with the tension compensator 140 as a base point is after passing through the tension compensator 140. A feature of the present invention is that the thin film 1 is wound up by being applied so as to be equal to or higher than the tension of the thin film 1.

Specifically, in the thin film film winding device 100, unwinding tension is applied to a section where the thin film 1 is unwound from the unwinding unit 110, and the thin film 1 is wound on the winding unit 120. A winding tension is applied to the section so that the unwinding tension has the same or larger tension than the winding tension. This can be achieved by providing the tension compensation unit 140 between the unwinding unit 110 and the winding unit 120, and at least one between the unwinding unit 110 and the winding unit 120. The guide roller 130 is interposed, and the tension compensator 140 can compensate for the tension attenuation by the guide roller 130, thereby controlling the winding tension in the range of 2% to 100% of the unwinding tension. can do.

Through such a configuration, the thin film film winding device 100 according to the present invention has a conventional process in which the thin film 1 is unwound from the unwinding unit 110 and the tension transmitted from the winding unit 120 is insufficient. The wrinkles that can be caused by poor winding can be minimized, and excessive tension that may cause deformation of the thin film 1 is applied in the process of winding the thin film 1 on the winding part 120. Can be minimized. This is because an appropriate unwinding tension that does not generate wrinkles in the unrolled thin film 1 is applied to the section in which the thin film 1 is unwound from the unwinding unit 110, and the thin film 1 is applied to the winding unit 120. By applying an appropriate winding tension that does not cause wobbling to the section to be wound, the winding and wobbling caused by high tension and low tension opposite to each other can be prevented. The problem can be improved at the same time.

The nip roller 150 is provided at a position where the nip roller 150 can come into contact with the winding unit 120, and presses the thin film 1 wound on the winding unit 120. The film 1 is movably provided so that the film 1 can be pressed or released. The nip roller 150 serves to improve a winding trace that may occur in the process of winding the thin film 1 around the winding unit 120. This minimizes the occurrence of winding traces by blocking the air from flowing into the thin film film 1 in the process of winding the thin film film 1 around the winding unit 120 through the configuration of the nip roller 150. Can do.

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

Referring to FIGS. 6 to 9, the method for winding a thin film according to the present invention includes a winding unit 120 through at least one guide roller 130 for the thin film 1 unwound from the unwinding unit 110. The winding unit 120 is rotationally driven so as to apply a winding tension to the thin film 1 to start winding the thin film 1; the unwinding unit 110 and the winding unit 120. And driving a tension compensator 140 that compensates for the tension of the thin film 1 that is attenuated by the guide roller 130; and before passing through the tension compensator 140 with the tension compensator 140 as a base point. The thin film film 1 is applied so that the tension of the thin film 1 is equal to or higher than the tension of the thin film 1 after passing through the tension compensation unit 140. Including; step of winding one.

First, as shown in FIG. 6, the thin film 1 unwound from the unwinding unit 110 is coupled to the winding unit 120 through at least one guide roller 130 and a tension compensating unit 140. Then, the winding unit 120 is driven to rotate so that a winding tension can be applied to the thin film 1, and winding of the thin film 1 is started. At this time, the winding unit 120 is applied with an initial winding tension Tw1 so that the thin film 1 is stably unwound from the unwinding unit 110 and does not generate wrinkles. It is rotationally driven so that the tension Tu1 is transmitted. That is, the initial unwinding tension Tu1 is Tu1 <Tw1 due to the tension attenuation by the guide roller 130.

Thereafter, as shown in FIG. 7, the tension compensator 140 is driven to apply a further winding tension to the thin film 1. At this time, the tension compensator 140 is configured such that the thin film 1 is unwound more stably from the unwinder 110 and the thin film 1 before passing through the tension compensator 140 does not generate wrinkles. The tension is applied so as to be equal to or higher than the tension of the thin film 1 after passing through the tension compensation unit 140 to compensate for the tension, and the tension on the unwinding unit 110 side is increased. It is driven so that an appropriate unwinding tension Tu2 is applied.

As shown in FIG. 8, the winding unit 120 is maintained in a state in which an appropriate unwinding tension Tu <b> 2 is applied to the unwinding unit 110 by driving the tension compensating unit 140. In the range where the winding process of the thin film 1 is stably performed, the initial winding tension is applied so that an appropriate winding tension Tw2 that does not cause the thin film 1 to swell is applied. It is rotationally driven while gradually reducing the rotational driving force from Tw1.

Then, as shown in FIG. 9, an appropriate unwinding tension Tu <b> 2 is applied to a section where the thin film 1 is unwound from the unwinding part 110, and the thin film 1 is unwound from the winding part 120. An appropriate winding tension Tw2 is applied to the section to be taken, and the appropriate unwinding tension Tu2 is applied so as to be equal to or higher than the appropriate winding tension Tw2. Winding is performed. That is, the appropriate unwinding tension Tu2 is Tu2 ≧ Tw2 due to the tension compensation by the tension compensator 140. At this time, preferably, the appropriate winding tension Tw2 is controlled in the range of 2% to 100% of the appropriate unwinding tension Tu2. In addition, as described above, in the process of winding the thin film 1 on the winding unit 120, the thin film 1 is pressed by the nip roller 150 provided at a position where the thin film 1 can come into contact with the winding unit 120. It is wound up.

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

As shown in FIG. 10, the thin film film winding device 100 according to the present invention peels off the copper foil 1 electrodeposited on the unwinding portion 110, that is, the negative electrode drum of the thin film manufacturing device, and is drawn out. It can be applied to equipment for winding 1. In this case, in a state where the thin film is wound around the unwinding part 110 in a roll form, the thin film is not unwound from the unwinding part 110, but the copper foil electrodeposited on the negative electrode drum is peeled off and wound. Except for the point which comes out, it is substantially the same as the winding apparatus of the thin film mentioned above.

Thus, the thin film film winding device 100 according to the present invention is an electrolytic copper foil having a width of 300 mm or more and a thickness of 30 μm or less among the electrolytic copper foils continuously produced from the thin film manufacturing apparatus. Since it is applied to the winding process, it is possible to stably peel the copper foil 1 in the section where the electrolytic copper foil 1 is drawn from the thin film manufacturing apparatus 110, and it is appropriate that the wrinkled copper foil 1 is not wrinkled. By applying an unwinding tension and applying an appropriate winding tension that does not cause undulation so that the copper foil 1 is not deformed in the section where the copper foil 1 is wound around the winding portion 120. Further, it is possible to simultaneously improve the problem of wrinkles and wobbling (swells) which are poor winding due to high tension and low tension opposite to each other. In addition, through the configuration of the nip roller 150, air can be prevented from flowing into the copper foil 1 in the process of winding the copper foil 1 around the winding portion 120, thereby minimizing the winding trace. Furthermore, since the winding apparatus 100 of the thin film film by this invention can increase the winding amount of the copper foil 1 wound by the winding part 120 as winding of the copper foil 1 is performed stably. It has an advantage that a long winding distance can be realized.

Although the present invention has been described with reference to the embodiments and the drawings, the present invention is not limited thereto, and the technical idea of the present invention and the equivalent scope of the claims are defined by those who have ordinary knowledge in the technical field to which the present invention belongs. Of course, various modifications and variations are possible.

According to the present invention, the process of winding the thin film by securing the unwinding tension of the unwinding portion to a predetermined reference value or more while setting the unwinding tension of the unwinding portion 50% or more lower than the conventional one. It is possible to minimize all the various winding defects such as wrinkles, swells, etc. In addition, the nip roller provided at a position where it can come into contact with the winding unit blocks the air from flowing into the inside of the thin film in the process of winding the thin film on the winding unit. It is possible to minimize defects such as winding traces due to deformation of the thin film caused by. As a result, the winding amount of the thin film to be wound can be increased as the winding failure of the thin film is minimized and the winding is stably performed, so that the winding distance and the yield can be improved. it can.

Claims (15)

A negative electrode unwinding roller which is provided separately from the positive electrode in the electrolytic cell and from which the electrodeposited electrolytic metal foil is peeled off and unwound;
A winding roller that is rotationally driven to apply a winding tension to the electrolytic metal foil that has been unwound from the negative electrode winding roller and winds the electrolytic metal foil;
At least one guide roller located between the negative electrode unwinding roller and the take-up roller and rotating in contact with the electrolytic metal foil to guide the movement of the electrolytic metal foil; and the negative electrode unwinding A tension compensator for compensating for the tension of the electrolytic metal foil located between a roller and the take-up roller and attenuated by the guide roller;
Unwinding tension Tu2 is applied to the section where the electrolytic metal foil is unwound from the negative electrode unrolling roller,
A winding tension Tw2 is applied to a section where the electrolytic metal foil is wound on the winding roller,
The winding device for an electrolytic metal foil, wherein the tension compensating unit compensates for the tension of the electrolytic metal foil so as to satisfy the following mathematical formula.
Tw2 ≦ Tu2 At least two guide rollers are provided,
2. The electrolytic metal foil winding apparatus according to claim 1, wherein the tension compensating unit is located between the two guide rollers.   3. The electrolytic metal foil according to claim 1, wherein the tension compensation unit includes at least one of the guide rollers and a drive motor that applies a rotational driving force to the guide rollers. Winding device.   3. The electrolytic metal foil winding device according to claim 1, wherein the tension compensation unit includes two rollers that press the electrolytic metal foil therebetween.   5. The electrolytic metal foil winding apparatus according to claim 4, wherein the tension compensation unit further includes a drive motor that applies a rotational driving force to at least one of the two rollers.   3. The electrolytic metal foil winding device according to claim 1, wherein the tension compensation unit includes a driving roller and a driving motor that applies a rotational driving force to the driving roller.   The winding device for an electrolytic metal foil according to claim 6, wherein a driving roller of the tension compensating unit is rotationally driven in a direction opposite to the guide roller.   2. The electrolytic metal foil according to claim 1, further comprising: a nip roller that is provided at a position where it can come into contact with the winding roller and presses the electrolytic metal foil wound around the winding roller. Winding device.   The winding device for an electrolytic metal foil according to claim 8, wherein the nip roller is movable so as to press or release the electrolytic metal foil.   2. The electrolytic metal foil winding device according to claim 1, wherein the electrolytic metal foil has a width of 300 mm or more.   2. The electrolytic metal foil winding apparatus according to claim 1, wherein the electrolytic metal foil has a thickness of 30 [mu] m or less. A winding method for winding the electrolytic metal foil from a negative electrode unwinding roller, which is provided separately from the positive electrode in the electrolytic cell, and is peeled off and unwound from the electrodeposited electrolytic metal foil,
(A) a step of binding the electrolytic metal foil unwound from the negative electrode unwinding roller to the winding roller through at least one guide roller;
(B) the winding roller is rotationally driven so as to apply a winding tension to the electrolytic metal foil and starts winding the electrolytic metal foil; and (c) the negative electrode winding roller and the winding roller. Driving a tension compensator for compensating for the tension of the electrolytic metal foil that is positioned between and attenuated by the guide roller,
Unwinding tension Tu2 is applied to the section where the electrolytic metal foil is unwound from the negative electrode unwinding roller, and winding tension Tw2 is applied to the section where the electrolytic metal foil is wound onto the winding roller, The tension compensating unit compensates for the tension of the electrolytic metal foil so as to satisfy the following mathematical formula.
Tw2 ≦ Tu2   The electrolytic metal foil is further squeezed by a nip roller provided at a position where the electrolytic metal foil can come into contact with the winding roller in a process in which the electrolytic metal foil is wound around the winding roller. The method for winding an electrolytic metal foil according to claim 12.   The method of winding an electrolytic metal foil according to claim 13, wherein the electrolytic metal foil has a width of 300 mm or more. The method of winding an electrolytic metal foil according to claim 13, wherein the electrolytic metal foil has a thickness of 30 μm or less.

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