KR102603050B1 - Linear electrode fabricating apparatus and method for fabricating linear electrode using the same - Google Patents

Abstract

In the linear electrode manufacturing apparatus and the linear electrode manufacturing method using the same, the linear electrode manufacturing apparatus includes a supply roll, a coating chamber, and a heating chamber. The supply roll supplies the linear substrate in a first direction or retrieves it in a second direction. The coating chamber stores the coating solution and applies the coating solution to the outer surface of the linear substrate provided from the supply roll. The heating chamber is located above the coating chamber, and a heating jacket that dries the coating solution applied to the linear substrate is located. Depending on the supply or recovery of the supply roll, the linear substrate repeatedly passes through the coating chamber and the heating chamber.

Description

Linear electrode manufacturing device and linear electrode manufacturing method using the same {LINEAR ELECTRODE FABRICATING APPARATUS AND METHOD FOR FABRICATING LINEAR ELECTRODE USING THE SAME}

The present invention relates to a linear electrode manufacturing apparatus and a linear electrode manufacturing method using the same. More specifically, in performing coating on a flexible linear type substrate such as a flexible wire or plate, the dipping process and the drying process are performed. It relates to a linear electrode manufacturing apparatus that can perform coating with uniformity and high precision by performing continuously and, if necessary, by repeatedly performing at least one of the dipping process and the drying process, and a linear electrode manufacturing method using the same. .

When manufacturing flexible linear electrodes by coating raw materials on a flexible linear type substrate such as a wire or planar body made of flexible material, the coating process for uniform coating is most important.

Regarding the coating process for such linear substrates, dip coating has been mainly used to date. That is, a method of applying a coating material to a substrate using dip coating and then performing separate drying through a drying unit is being applied.

For example, as in Japanese Patent Publication No. 2019-527641, in the production of a carbon nanotube film structure, a common technique is to transfer the carbon nanotube film in one direction and perform dip coating in the process.

However, in the case of the coating process for a linear substrate using such dip coating, especially in the process of continuously moving the linear substrate in the horizontal direction toward the dryer after coating, the coating material coated on the linear substrate is deflected downward due to gravity. There is a problem that the uniformity of the coating is deteriorated.

In addition, after the coating material is applied to the linear substrate, it is a structure that can only move in a single direction with a drying section only on the side where it is injected. In order to adjust the thickness of the coating material coated on the linear substrate, it must be returned to the initial position after injection. Since linear substrates must be connected, the process is complicated and the efficiency of facility operation is reduced.

Japanese Patent Publication No. 2019-527641

Accordingly, the technical problem of the present invention was conceived from this point, and the purpose of the present invention is to continuously perform the immersion process and the drying process in coating a flexible linear type substrate such as a flexible wire or a plate. The aim is to provide a linear electrode manufacturing device that can perform coating with uniformity and high precision by allowing thickness control in real time by repeatedly performing at least one of the immersion process and the drying process as needed.

In addition, another object of the present invention is to provide a method of manufacturing a linear electrode using the linear electrode manufacturing apparatus.

A linear electrode manufacturing apparatus according to an embodiment for realizing the object of the present invention described above includes a supply roll, a coating chamber, and a heating chamber. The supply roll supplies the linear substrate in a first direction or retrieves it in a second direction. The coating chamber stores the coating solution and applies the coating solution to the outer surface of the linear substrate provided from the supply roll. The heating chamber is located above the coating chamber, and a heating jacket that dries the coating solution applied to the linear substrate is located. Depending on the supply or recovery of the supply roll, the linear substrate repeatedly passes through the coating chamber and the heating chamber.

In one embodiment, the linear substrate may be a flexible wire, yarn, or flexible planar shape.

In one embodiment, the coating chamber is provided with a switching roll that changes the moving direction of the linear substrate, and the linear substrate can be moved upward while passing through the switching roll.

In one embodiment, the changeover roll includes a pair of first and second changeover rolls spaced apart by a predetermined distance, and when the linear substrate is planar, the linear substrate passes through the first and second changeover rolls. The direction in which the coating surface faces can be switched.

In one embodiment, a plurality of switching rolls are spaced apart in the vertical direction and are arranged in series, so that the time for the linear substrate to pass through the coating solution can be increased.

In one embodiment, the heating chamber may have a cylindrical shape with top and bottom openings to allow the linear substrate to pass through.

In one embodiment, the heating jacket may be formed along the inner peripheral surface of the heating chamber to form a heating space therein.

In one embodiment, the heating jacket includes a first jacket forming a first heating space through which a descending linear substrate passes, and a second heating space positioned to be spaced apart from the first jacket and through which an ascending linear substrate passes. It may include a second jacket forming a.

In one embodiment, it further includes a recovery roll located at the other end of the supply roll to recover the linear substrate in a first direction or supply the linear substrate in a second direction, wherein the linear substrate is between the supply roll and the recovery roll. , the direction can be changed and moved.

In one embodiment, a sensor unit located adjacent to the linear substrate to measure the coating state of the linear substrate or a dry state of the coating solution, and based on the sensing result of the sensor unit, the supply roll and the recovery roll. It may further include a control unit that controls the driving direction.

In one embodiment, the control unit may repeatedly change the driving directions of the supply roll and the recovery roll until the coating of the linear substrate reaches the target coating thickness and the drying condition is good.

In one embodiment, the sensor unit includes an upper sensor located between the supply roll, the recovery roll, and the heating chamber to measure the coating state or the dry state, and an upper sensor located between the heating chamber and the coating chamber. It may include a lower sensor that measures the coating state or the dry state.

In a linear electrode manufacturing method according to an embodiment for realizing another object of the present invention described above, a linear substrate is supplied in a first direction and coating is performed on the outer surface of the linear substrate. The linear substrate is recovered in the first direction, and the coating solution coated on the linear substrate is dried. It includes determining whether the target coating thickness has been reached and whether the drying condition is good. If the target coating thickness is not reached or the drying condition is not good, the linear substrate is supplied in the second direction and additional coating is performed, or the linear substrate is recovered in the second direction and the linear substrate is applied to the linear substrate. Dry the coated coating solution.

In one embodiment, the linear electrode manufacturing method includes supplying the linear substrate in a first direction and coating the outer surface of the linear substrate, followed by measuring the thickness of the coating solution coated on the linear substrate. Further comprising, after recovering the linear substrate in the first direction and drying the coating solution coated on the linear substrate, measuring the dry state and the thickness of the coating solution coated on the linear substrate. It can be included.

In one embodiment, when the linear substrate is supplied in the second direction and additional coating is performed, the thickness of the coating solution coated on the linear substrate is measured, the linear substrate is recovered in the second direction, and the linear substrate is When drying the coating solution coated on , the dry state and the thickness of the coating solution coated on the linear substrate can be measured.

According to embodiments of the present invention, in coating a linear substrate, it is difficult to control the coating thickness or dry the coating solution due to the conventional coating being carried out in only one direction, and the supply or recovery of the supply roll is improved. Accordingly, by repeatedly passing the linear substrate through the coating chamber and the heating chamber, coating is performed to the required thickness and the drying effect is improved, enabling more uniform and precise coating control.

Additionally, when the linear substrate has a planar shape, more uniform coating and uniform drying on both sides can be performed by switching the coating surface through a switching roll. Furthermore, the coating effect can be further improved by arranging a plurality of switching rolls in succession to increase the passage length of the linear substrate passing through the coating solution.

Meanwhile, the heating chamber includes a heating jacket with a heat source, and performs drying while the linear substrate passes through the heating jacket, so effective drying can be performed without interfering with the transport of the linear substrate. You can.

In particular, since a pair of heating jackets are provided to cover each of the pair of linear substrates, more uniform drying of the pair of linear substrates that rise and fall can be performed.

In addition, the sensor unit that measures the coating and drying status is placed adjacent to both the linear substrate that has passed through the coating chamber and the linear substrate that has passed through the heating chamber, allowing immediate measurement of the coating and drying status regardless of the driving direction of the linear substrate. Based on this, the control unit controls the driving directions of the supply roll and recovery roll, so that coating and drying of the linear substrate can be repeatedly performed. Through this, more uniform coating and more effective drying of the linear substrate can be performed.

1 is a schematic diagram showing a linear electrode manufacturing apparatus according to an embodiment of the present invention.
FIG. 2A is a cross-sectional view showing an example of a cross-section taken along line II′ of FIG. 1, and FIG. 2b is a cross-sectional view showing another example of a cross-section taken along line II′ of FIG. 1.
Figure 3 is a schematic diagram showing a linear electrode manufacturing apparatus according to another embodiment of the present invention.
Figure 4 is a schematic diagram showing the interior of a coating chamber in a linear electrode manufacturing apparatus according to another embodiment of the present invention.
Figure 5 is a schematic diagram showing a linear electrode manufacturing apparatus according to another embodiment of the present invention.
FIG. 6 is a flowchart showing a method of manufacturing a linear electrode using the linear electrode manufacturing apparatus of FIG. 5.
FIG. 7 is a flowchart specifically showing the linear electrode manufacturing method of FIG. 6.

Since the present invention can be subject to various changes and can have various forms, embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “consist of” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings.

1 is a schematic diagram showing a linear electrode manufacturing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the linear electrode manufacturing apparatus 10 according to this embodiment includes a supply roll 100, a recovery roll 200, a conversion roll 300, a heating chamber 400, a coating chamber 500, and a control unit. Includes (600).

As shown, the linear electrode manufacturing apparatus 10 in this embodiment manufactures a linear electrode by coating a wire 20 or yarn as a linear substrate, and the wire 20 Alternatively, the yarn may be flexible and may be composed of one strand or multiple strands bundled together.

Accordingly, the linear electrode manufactured through the linear electrode manufacturing apparatus 10 may be, for example, a conductive wire or a battery electrode.

However, hereinafter, for convenience of explanation, a single wire 20 will be used as an example.

The supply roll 100 is a roller that supplies the wound wire 20, and its driving is controlled according to a control signal from the control unit 600. In this case, the supply roll 100 may rotate counterclockwise to supply the wire 20 in the first direction (①). As will be described later, the supply roll 100 may rotate clockwise to supply the wire 20 in the first direction (①). (20) can be recovered in the second direction (②).

That is, for convenience of explanation, the supply roll 100 is called a 'supply' roller, but in the case of recovering the wire 20 in the second direction, it can function as a 'recovery' roller.

In addition, the recovery roll 200 is a roller that recovers and winds the wire 20, and its operation is controlled according to a control signal from the control unit 600. In this case, the recovery roll 200 rotates counterclockwise to recover the wire 20 in the first direction (①). As will be described later, the recovery roll 200 rotates clockwise to collect the wire 20 in the first direction (①). The wire 20 can be supplied in the second direction (②).

That is, for convenience of explanation, the recovery roll 200 is called a 'recovery' roller, but in the case of supplying the wire 20 in the second direction, it can function as a 'supply' roller.

The direction of the wire 20 supplied (or recovered) from the supply roll 100 is changed or tension is maintained by the first idle roll 110 disposed adjacent to the supply roll 100.

Likewise, the direction of the wire 20 that is recovered (or supplied) to the recovery roll 200 is changed or the tension is maintained by the second idle roll 210 disposed adjacent to the recovery roll 200.

Thus, the wire 20 is provided to the heating chamber 400 located below the first idle roll 110 and the second idle roll 210 or is recovered from the heating chamber 400.

That is, in this embodiment, the wire 20 moves in the vertical direction and penetrates the heating chamber 400. Accordingly, the heating chamber 400 may have a cylindrical structure with the upper and lower surfaces open, and the wire 20 moves the heating chamber 400 upward or downward under control by the control unit 600. penetrates in this direction.

In this case, the heating chamber 400 is provided with a heating jacket 410 inside, and the heating jacket 410 includes a heat source and heats the wire 20 penetrating the inside. to provide. Accordingly, drying is performed on the coating material coated on the outer surface of the wire 20.

The detailed structure of the heating jacket 410 will be described with reference to the drawings described later.

The coating chamber 500 is located below the heating jacket 410 and performs coating on the wire 20.

In this case, the coating solution 501 (see FIG. 3) is stored in a storage space formed inside the coating chamber 500, and the wire 20 passes through the coating solution of the coating chamber 500 while passing through the outer surface. A coating material is applied to the

At this time, the switching roll 300 is located inside the coating chamber 500, and the wire 20, which is transported in the downward direction by the switching roll 300, changes direction and is transported in the upward direction. . That is, the wire 20 transported in the downward direction passes through the conversion roll 300 and the coating solution is applied, and then is transported upward toward the heating chamber 400.

The transfer process of the wire 20 will be described in detail as follows.

That is, the supply roll 100 and the recovery roll 200 begin to rotate counterclockwise simultaneously by the driving control of the controller 600, and accordingly, the wire 20 moves in the first direction (①). is transferred to

Accordingly, the direction of the wire 20 is changed by the first idle roll 110 and is transported downward and passes through the heating chamber 400. In this case, since the wire 20 is not coated with a separate coating material, the heating chamber 400 does not operate, separate drying is not performed, and the wire 20 continues to descend.

Afterwards, the wire 20 is transferred into the coating chamber 500, and the coating material is applied to the outer surface of the wire 20, and at the same time, the transfer direction is changed and transferred upward.

Thus, the wire 20 passes through the heating chamber 400 with a coating material applied to its outer surface, and the coating material is dried by the heat provided by the heating jacket 410.

Furthermore, the wire 20 dried through the heating jacket 410 is recovered to the recovery roll 200 through the second idle roll 210.

Meanwhile, if the coating on the wire 20 is not sufficiently performed while passing through the coating chamber 500, the control unit 600 switches the transfer direction of the wire 20 to move the wire 20 in the second direction (②). ), and through this, the wire 20 passes through the coating chamber 500 again in the opposite direction, and coating on the outer surface can be repeatedly performed.

Furthermore, if the coating material is not sufficiently dried while passing through the heating jacket 410, the control unit 600 similarly switches the transfer direction of the wire 20 and controls the wire 20 to be transferred in the second direction (②). Through this, the wire 20 passes through the heating jacket 410 again in the opposite direction, and drying can be repeatedly performed.

Additionally, the coating and drying can be performed repeatedly as needed, and this can be easily implemented by the control unit 600 switching the driving directions of the supply roll 100 and the recovery roll 200.

Hereinafter, the structure of the heating jacket will be described with reference to the drawings.

FIG. 2A is a cross-sectional view showing an example of a cross-section taken along line II′ of FIG. 1, and FIG. 2b is a cross-sectional view showing another example of a cross-section taken along line II′ of FIG. 1.

First, referring to FIG. 2A, the heating jacket 410 may be attached along the inner peripheral surface of the heating chamber 400. That is, since the heating chamber 400 has a cylindrical shape with open upper and lower surfaces, the heating jacket 410 also has a cylindrical shape with open upper and lower surfaces and is fixed along the inner peripheral surface of the heating chamber 400. can be located.

Accordingly, a heating space 405 is formed along the center of the heating jacket 410, and the wire 20 passes through the heating space 405.

In this case, the wire 20 is supplied through the supply roll 100 and passes through the heating space 405 in the downward direction, and the wire 20 passes through the coating chamber 500 and flows upward into the heating space ( It includes a wire passing through 405, and the pair of wires simultaneously pass through the heating space 405 formed by the heating jacket 410.

However, in the case of the wire passing through the coating chamber 500 and passing through the heating space 405 in the upward direction, drying is required, so it needs to be dried while passing through the heating jacket 410, but the supply roll 100 In the case of a wire supplied through ) and penetrating the heating space 405 in the downward direction, separate drying is not necessary.

Nevertheless, in the case of drying through the heating jacket 410 shown in FIG. 2A, heat is maintained even through the wire supplied through the supply roll 100 and penetrating the heating space 405 in the downward direction. do. Therefore, unnecessary waste of heat sources may occur.

Accordingly, referring to FIG. 2b, a pair of heating jackets 420 may be provided and located inside the heating chamber 400, and the pair of heating jackets 420 may each be connected to a pair of wires. Can be formed to cover independently.

That is, as shown, the wire supplied through the supply roll 100 and penetrating the heating space 405 in the downward direction penetrates the first heating space 406 formed by the first jacket 421. The wire passing through the coating chamber 500 and penetrating the heating space 405 in the upward direction may be formed to penetrate the second heating space 407 formed by the second jacket 422. there is.

In this case, the first jacket 421 and the second jacket 422 may have a cylindrical shape with both upper and lower surfaces open, and the diameter is smaller than the diameter of the heating chamber 400. The drying effect on wires can be further improved.

In particular, when the first and second jackets 421 and 422 are distinguished from each other as described above and drying is performed on each pair of wires, drying can be performed by operating the jacket only for the wire that requires drying. Therefore, unnecessary waste of heat sources can be minimized.

For example, in the initial state, the wire supplied through the supply roll 100 and penetrating the heating space 405 in the downward direction does not require separate drying, so the first jacket 421 may not be operated. . On the other hand, since the wire passing through the coating chamber 500 and penetrating the heating space 405 in the upward direction requires drying, only the second jacket 422 is operated.

As described above, the jackets 421 and 422 can be selectively operated only when a wire requiring drying passes through, thereby minimizing unnecessary waste of heat sources.

Figure 3 is a schematic diagram showing a linear electrode manufacturing apparatus according to another embodiment of the present invention.

Since the linear electrode manufacturing apparatus 11 according to this embodiment is substantially the same as the linear electrode manufacturing apparatus 10 described with reference to FIG. 1 except for the switching roll 301, the same reference numerals are used for the same configuration. and overlapping explanations are omitted.

As described above, the linear substrate may be, for example, a wire 20 or a yarn, but may also be a flexible planar body having a planar shape. Additionally, in the case of a linear electrode manufactured using such a planar body, it may also be a conductive wire or a battery electrode.

In the case of such a linear substrate of the planar body 30, when it passes through the heating jacket 410 having the shape described in FIG. 2A, there is a limitation in that uniform drying on both surfaces cannot be performed.

That is, as shown in FIG. 3, in the case of the planar body 30 supplied through the supply roll 100 and penetrating the heating jacket 410 in the downward direction, the first coating of the planar object 30 The surface 31 is close to the first surface 401 of the heating jacket 410, but the second coated surface 32 is transported far away from the second surface 402 of the heating jacket 410. .

Accordingly, when the planar body 30 passes in the downward direction, the first coated surface 31 is close to the first surface 401, and thus is relative to the first surface 401 as indicated by a solid arrow. However, since the second coating surface 32 faces the opposite direction from the first surface 401, it is relatively far away from the second surface 402, as indicated by a dotted arrow. Low heat is provided.

On the other hand, in the case where only the vertical transport direction of the planar body 30 is switched and supplied through one changeover roll 300 shown in FIG. 1, the planar object rising through the changeover roll 300 In the case of (30), when passing through the heating jacket 410, the first coated surface 31 still faces the second surface 402 located adjacent to the second coated surface 32. is directed toward the first surface 401 that is relatively far apart.

Accordingly, even when the planar body 30 passes upward, the first coated surface 31 is close to the second surface 402, and thus, as indicated by a solid arrow from the second surface 402. Although it is provided with relatively high heat, the second coating surface 31 faces the opposite direction from the second surface 402 and is therefore relatively far away from the first surface 401, as indicated by the dotted arrow. Relatively low heat is provided.

Accordingly, the state of providing heat to the front and back sides of the planar body 300 becomes non-uniform, and accordingly, the uniformity of the coating on the overall planar object 300 deteriorates.

Therefore, in this embodiment, as shown in FIG. 3, the conversion roll 301 includes a pair of first and second conversion rolls 310 and 320, so that the first and second conversion rolls The surface of the cube 300 is switched between the rolls 310 and 320.

Thus, in the process of transporting the planar body 30 in the downward direction, the first coating surface 31 facing the outside, that is, the first surface 401, changes position, and in the process of transporting the planar body 30 in the upward direction, the position is changed to the inside, That is, it faces the first side 401.

Accordingly, the first coated surface 31 and the second coated surface 32 of the planar body 30 include a section located close to the heat source of the heating jacket 410 while descending or rising, respectively, Accordingly, drying of the coating solution 501 coated on the planar body 30 can be performed more uniformly.

Figure 4 is a schematic diagram showing the interior of a coating chamber in a linear electrode manufacturing apparatus according to another embodiment of the present invention.

Since the linear electrode manufacturing apparatus 12 according to this embodiment is substantially the same as the linear electrode manufacturing apparatus 10 described with reference to FIG. 1 except for the switching roll 302, the same reference numerals are used for the same configuration. and overlapping explanations are omitted.

Referring to FIG. 4, in the linear electrode manufacturing apparatus 12 according to this embodiment, the switching roll 302 includes a plurality of rollers, and the rollers 331, 332, ..., 333 move up and down. They are arranged alternately in directions to transport the wire 20.

That is, in the case of the rollers, the first roller 331, the third roller, ..., the n-th roller 333 (hereinafter referred to as lower rollers) are arranged spaced apart from each other along one direction, and the second roller ( 332), the fourth roller, ..., the n-1th roller (hereinafter, upper rollers) are arranged to be spaced apart from each other along one direction, and the upper rollers may be disposed above the lower rollers.

However, all rollers 331, 332, ..., 333 are positioned in a state immersed in the coating solution 501 stored in the coating chamber 500.

Accordingly, the coating solution 501 is continuously applied to the wire 20 while passing through the switching roll 302 including the plurality of rollers.

That is, as in the present embodiment, the wire 20 passes through the plurality of conversion rolls 302, so the time for the wire 20 to be positioned on the coating solution 501 increases. Accordingly, sufficient coating time can be secured by transporting the wire 20 in only one direction without increasing the coating time by changing the direction of the wire 20.

Accordingly, effective coating can be performed even on wires that require relatively thick coating or have materials that do not allow coating to be easily performed.

In this case, it is obvious that the number and arrangement of rollers included in the conversion roll 302 can be varied in various ways considering the required coating thickness or coating time.

Figure 5 is a schematic diagram showing a linear electrode manufacturing apparatus according to another embodiment of the present invention.

Since the linear electrode manufacturing apparatus 13 according to this embodiment is substantially the same as the linear electrode manufacturing apparatus 10 described with reference to FIG. 1 except that it further includes a sensor unit 700, the same configuration Reference numbers are used and duplicate descriptions are omitted.

Referring to FIG. 5, the linear electrode manufacturing apparatus 13 according to this embodiment further includes the sensor unit 700.

Specifically, the sensor unit 700 includes an upper sensor 710 and a lower sensor 720, and the upper sensor 710 includes a pair of first and second upper sensors 711 and 712. And the lower sensor 720 includes a pair of first and second lower sensors 721 and 722.

In this case, the first upper sensor 711 is disposed adjacent to the wire 20 between the first idle roll 110 and the heating chamber 400, and the second upper sensor 712 is It is disposed adjacent to the wire 20 between the second idle roll 210 and the heating chamber 400.

In addition, the first lower sensor 721 is disposed adjacent to the wire 20 descending (or rising) between the heating chamber 400 and the coating chamber 500, and the second lower sensor 722 is disposed adjacent to the wire 20 rising (or falling) between the heating chamber 400 and the coating chamber 500.

In this case, the first and second upper sensors 711 and 712, and the first and second lower sensors 721 and 722 all determine the coating state of the wire 20 and the wire 20. The dry state of the coating solution 501 coated can be measured, and the information measured in this way can be provided to the control unit 600.

The coating state of the wire 20 may ultimately be the coating thickness of the coating solution 501 applied to the wire 20.

In contrast, the first and second upper sensors 711 and 712 can only measure the dry state of the coating solution 501 coated on the wire 20, and the first and second lower sensors ( 721 and 722 can measure the coating state of the wire 20 and the dry state of the coating solution 501 coated on the wire 20.

Measurement of the coating state or dry state of the sensors may be selectively performed and may be selected depending on the transfer direction of the wire 20.

For example, when the wire 20 begins to be transferred in the first direction (①), the first upper sensor 711 and the first lower sensor 721 do not operate, and the coating chamber 500 After the coating solution 501 is applied, the second lower sensor 722 operates to measure the thickness of the applied coating solution 501.

In this case, when the thickness of the coating solution 501 does not reach the target thickness, the wire 20 is transferred in the second direction (②) and applied again through the coating solution 501. The first lower sensor 721 operates to measure the thickness of the applied coating solution 501.

Thus, if the target thickness is satisfied, the wire 20 rises in the second direction and passes through the heating chamber 400, and then the first upper sensor 711 operates to check the dry state of the coating solution. It will be measured. Accordingly, if the dry state is sufficient, the supply roll 100 plays the role of a recovery roll and rewinds the wire 20, thereby ending the coating process.

However, if the dry state is not sufficient, the wire 20 is switched back to the first direction and descends to pass through the heating chamber 400, and the first lower sensor 721 operates to cool the coating solution. The dry state can be measured.

As described above, the transfer of the wire 20 in the first direction (①) and the second direction (②) can be repeated and switched in various ways depending on the needs of the drying process or coating process, and further, each process At the end position, the upper sensor 710 and the lower sensor 720 selectively measure the thickness of the applied coating solution or the dry state of the coating solution to determine whether the process needs to be repeated or whether it is finished. You can.

In this case, the control unit 600 receives feedback from the sensing results of the upper sensor 710 and the lower sensor 720, and controls the supply roll 100 and the recovery based on information on the target coating thickness and target drying state. The driving direction of the roll 200 is controlled, and through this, the drying process and coating process described above can be repeatedly performed in various combinations.

The linear electrode manufacturing method using the linear electrode manufacturing apparatus 13 according to this embodiment will be described as follows.

FIG. 6 is a flowchart showing a method of manufacturing a linear electrode using the linear electrode manufacturing apparatus of FIG. 5.

That is, referring to FIG. 6, in the linear electrode manufacturing method, first, the supply roll 100 supplies the linear substrate (wire, 10, hereinafter referred to as linear substrate) in the first direction (①), and The recovery roll 200 recovers the linear substrate in the first direction (①) and performs coating and drying processes (step S10).

Specifically, the linear substrate 20 is supplied in the first direction (①), so that the linear substrate 20 passes through the coating chamber 500, and through this, the linear substrate 20 is formed on the outer surface of the linear substrate 20. The coating solution 501 is coated (step S11).

Afterwards, the thickness of the coating solution is measured at the second lower sensor 722 for the linear substrate 20 passing through the coating chamber 500 and rising along the first direction ① (step S12).

Afterwards, the linear substrate 20 is continuously transferred in the first direction (①) so that it passes through the heating jacket 410, and the coating is applied to the linear substrate 20 through the heating jacket 410. The solution is dried (step S13).

Afterwards, the second upper sensor 712 measures the dry state of the coating solution coated on the linear substrate 20 and, if necessary, the final coating thickness (step S14), and the control unit 600 measures the dry state of the coating solution coated on the linear substrate 20. Based on the results, it is determined whether the target coating thickness has been reached and whether the drying condition is good (step S20).

Accordingly, if the target coating thickness is reached and the drying condition is good, the linear substrate 20 is continuously transferred in the first direction ① and wound on the recovery roll 200, and the coating and drying process is completed. Thus, the linear substrate can be manufactured as a linear electrode.

On the other hand, if additional coating or drying is required, the recovery roll 200 is operated as a supply roll and the supply roll 100 is operated as a recovery roll to transport the linear substrate 20 in the second direction ②. Coating and drying of the linear substrate 20 are additionally performed (step S30).

That is, the linear substrate 20 is transferred in the second direction ② to pass through the coating chamber 500 again, and additional coating of the linear substrate 20 is performed (step S31).

Afterwards, the first lower sensor 721 measures the coating thickness of the coating solution for the linear substrate 20 that has passed through the coating chamber 500 (step S32).

In addition, the linear substrate 20 is transferred in the second direction (②) and passes through the heating jacket 410, thereby drying the additionally coated coating solution in the heating jacket 410. is performed (step S33).

Furthermore, the first upper sensor 711 measures the dry state and final coating thickness of the linear substrate 20 (step S34), and if the target coating thickness is reached and the dry state is good, the linear substrate 20 (20) is continuously transferred in the second direction (②) and wound around the supply roll (100), and the coating and drying process is completed, so that the linear substrate can be manufactured into a linear electrode.

The manufacturing method of the linear electrode will be described again with reference to a more specific flow chart as follows.

FIG. 7 is a flowchart specifically showing the linear electrode manufacturing method of FIG. 6.

First, referring to FIG. 7, in the linear electrode manufacturing method, the linear substrate 20 is supplied in the first direction ① (step S100).

Accordingly, the linear substrate 20 supplied in the first direction passes through the coating chamber 500 and the coating solution 501 is applied to the outer surface (step S200).

Afterwards, the thickness of the coating solution 501 coated on the linear substrate 20 is sensed using the second lower sensor 722 to determine whether the initial coating thickness has been reached (step S300). .

Generally, after a coating solution is coated on a substrate, the coating thickness changes due to evaporation of the solvent during the drying process. Therefore, the coating thickness coated before drying may be different from the final target coating thickness, and accordingly, the target coating thickness before drying can be defined as the initial coating thickness. Accordingly, the initial coating thickness can be defined as the coating thickness immediately after coating, when the solvent is evaporated through drying to reach the final target coating thickness.

Therefore, if the thickness of the coating solution 501 does not reach the initial coating thickness, the supply direction of the linear substrate 20 is switched to the second direction ②, and coating is performed again in the coating chamber 500. Perform (step S200).

Thus, this coating process can be repeated until the initial coating thickness is reached.

Afterwards, when the initial coating thickness is reached, the coating solution 501 coated on the linear substrate 20 passes through the heating jacket 410 and is dried (step S500).

Afterwards, it is determined whether the drying state of the coating solution 501 coated on the linear substrate 20 is good (step S600), which is determined by using the first upper sensor 711 or the second upper sensor 712. It is carried out through.

That is, the linear substrate 20 may be transferred in the second direction ② toward the supply roll 100 and in the first direction ① toward the recovery roll 200 as the coating process is repeated. Since it can be transported, the dry state of the coating solution of the linear substrate 20 is sensed by the first upper sensor 711 or the second upper sensor 712 in consideration of this transport state.

In this case, when it is determined that the dry state is not good as a result of sensing, that is, when it is determined that additional drying is necessary, the control unit 600 switches the supply direction of the linear substrate 20 (step S700), The linear substrate 20 is passed through the heating jacket 410 again and the coating solution 501 is repeatedly dried (step S500).

Furthermore, this drying process can also be performed repeatedly until necessary.

Afterwards, when it is determined that the drying condition is good, the coating thickness of the linear substrate 20 is sensed by the first upper sensor 711 or the second upper sensor 712, and the sensed coating thickness is the target coating. It is determined whether the thickness, that is, the final coating thickness, has been reached (step S800).

Of course, in this case, if the sensed coating thickness does not reach the target coating thickness, the control unit 600 switches the supply direction of the linear substrate 20 again (step S400), so that the linear substrate 20 is It passes through the coating chamber 500 again so that the coating solution 501 is additionally applied.

Thus, if the sensed coating thickness reaches the target coating thickness (step S800), the linear substrate 20 is additionally transferred in the currently transferred supply direction to the supply roll 100 or the recovery roll 200. The linear substrate 20 is recovered (step S900).

According to the above-described embodiments of the present invention, in coating a linear substrate, the limitation of controlling the coating thickness or drying of the coating solution is difficult due to conventional coating in only one direction, and supply of supply rolls is overcome. Alternatively, depending on the number of times, the linear substrate passes through the coating chamber and the heating chamber repeatedly, thereby performing coating to the required thickness and improving the drying effect, enabling more uniform and precise coating control.

Additionally, when the linear substrate has a planar shape, more uniform coating and uniform drying on both sides can be performed by switching the coating surface through a switching roll. Furthermore, the coating effect can be further improved by arranging a plurality of switching rolls in succession to increase the passage length of the linear substrate passing through the coating solution.

Meanwhile, the heating chamber includes a heating jacket with a heat source, and performs drying while the linear substrate passes through the heating jacket, so effective drying can be performed without interfering with the transport of the linear substrate. You can.

In particular, since a pair of heating jackets are provided to cover each of the pair of linear substrates, more uniform drying of the pair of linear substrates that rise and fall can be performed.

In addition, the sensor unit that measures the coating and drying status is placed adjacent to both the linear substrate that has passed through the coating chamber and the linear substrate that has passed through the heating chamber, allowing immediate measurement of the coating and drying status regardless of the driving direction of the linear substrate. Based on this, the control unit controls the driving directions of the supply roll and recovery roll, so that coating and drying of the linear substrate can be repeatedly performed. Through this, more uniform coating and more effective drying of the linear substrate can be performed.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the following patent claims. You will understand that it is possible.

10, 11, 12, 13: Linear electrode manufacturing device
20: Wire 30: Cube
100: supply roll 200: recovery roll
300, 301, 302: Conversion roll 400: Heating chamber
401: first side 402: second side
410, 420: Heating jacket 500: Coating chamber
501: Coating solution 600: Control unit
700: Sensor unit

Claims (15)

a supply roll that supplies the linear substrate in a first direction or retrieves it in a second direction;
a coating chamber that stores the coating solution and applies the coating solution to the outer surface of the linear substrate provided from the supply roll;
a heating chamber located at an upper part of the coating chamber, where a heating jacket that dries the coating solution applied to the linear substrate is located;
a sensor unit located adjacent to the linear substrate to measure a coating state of the linear substrate or a dry state of the coating solution; and
A control unit that controls the driving direction of the linear substrate based on the sensing result of the sensor unit,
A linear electrode manufacturing apparatus, characterized in that the linear substrate repeatedly passes through the coating chamber and the heating chamber according to the supply or recovery of the supply roll. The method of claim 1, wherein the linear substrate is:
A linear electrode manufacturing device characterized in that it is made of flexible wire, yarn, or flexible planar material. According to paragraph 2,
The coating chamber is provided with a switching roll to change the direction of movement of the linear substrate,
A linear electrode manufacturing device, wherein the linear substrate passes through the switching roll and moves upward. According to paragraph 3,
The changeover roll includes a pair of first and second changeover rolls spaced apart by a predetermined distance,
When the linear substrate is planar, the linear substrate passes through the first and second switching rolls and the direction of the coating surface is switched. According to paragraph 3,
A linear electrode manufacturing device, characterized in that the plurality of switching rolls are spaced apart in the vertical direction and are arranged in series to increase the time for the linear substrate to pass through the coating solution. The method of claim 1, wherein the heating chamber is:
A linear electrode manufacturing device characterized in that it has a cylindrical shape with upper and lower openings to allow the linear substrate to pass through. The method of claim 6, wherein the heating jacket:
A linear electrode manufacturing device, characterized in that it is formed along the inner peripheral surface of the heating chamber to form a heating space therein. The method of claim 6, wherein the heating jacket:
a first jacket forming a first heating space through which the descending linear substrate passes; and
A linear electrode manufacturing apparatus comprising a second jacket positioned to be spaced apart from the first jacket and forming a second heating space through which an ascending linear substrate passes. According to paragraph 1,
It further includes a recovery roll located at the other end of the supply roll to recover the linear substrate in a first direction or supply the linear substrate in a second direction,
A linear electrode manufacturing device, characterized in that the linear substrate changes direction and moves between the supply roll and the recovery roll. delete The method of claim 9, wherein the control unit,
A linear electrode manufacturing device, characterized in that the driving directions of the supply roll and the recovery roll are repeatedly switched until the coating of the linear substrate reaches the target coating thickness and the drying condition is good. The method of claim 9, wherein the sensor unit,
An upper sensor located between the supply roll, the recovery roll, and the heating chamber to measure the coating state or the dry state; and
A linear electrode manufacturing device comprising a lower sensor located between the heating chamber and the coating chamber to measure the coating state or the dry state. supplying a linear substrate in a first direction and coating an outer surface of the linear substrate;
recovering the linear substrate in a first direction and drying the coating solution coated on the linear substrate; and
It includes determining whether the target coating thickness has been reached and whether the drying condition is good,
If the target coating thickness is not reached or the drying condition is not good, the linear substrate is supplied in the second direction and additional coating is performed, or the linear substrate is recovered in the second direction and the linear substrate is applied to the linear substrate. A linear electrode manufacturing method characterized by drying the coated coating solution. According to clause 13,
After supplying the linear substrate in a first direction and coating the outer surface of the linear substrate, it further includes measuring the thickness of the coating solution coated on the linear substrate,
After recovering the linear substrate in the first direction and drying the coating solution coated on the linear substrate, the method further includes measuring the dry state and the thickness of the coating solution coated on the linear substrate. Linear electrode manufacturing method. According to clause 14,
When additional coating is performed while supplying the linear substrate in the second direction, measure the thickness of the coating solution coated on the linear substrate,
When recovering the linear substrate in a second direction and drying the coating solution coated on the linear substrate, a linear electrode manufacturing method characterized in that the dry state and the thickness of the coating solution coated on the linear substrate are measured.

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