Insulating solution flow path structure of slit die coater

Abstract

Disclosed herein is a slit die coater including a first die block provided with a manifold for containing an electrode slurry; a second mold block coupled to the first mold block; and a coater pad interposed between the first mold block and the second mold block, where the coater pad includes: body pads surrounding both sides and a rear surface of the manifold, and a plurality of spacer pads spaced apart between the body pads so as to traverse toward a front surface of the manifold, wherein a concave insulating solution flow path is formed on a surface of the plurality of spacer pads, and wherein the plurality of spacer pads includes a first spacer pad fixed in position with respect to the body pad, and a second spacer pad movable within the first spacer pad.

Description

Technical Field

[0001] This disclosure relates to a slot die coating machine that simultaneously discharges electrode slurry and insulating solution onto an electrode foil, and more particularly to an insulating solution flow path structure for the slot die coating machine that allows for easy control of the amount of insulating solution discharged by adjusting the position of spacer shims.

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0051318, filed on April 17, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] Lithium-ion rechargeable batteries are widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as battery packs or energy storage devices for hybrid or electric vehicles. In particular, with increasing concern about environmental issues, research has been actively conducted on electric and hybrid vehicles, which can replace fossil fuel-powered vehicles such as those powered by gasoline and diesel, which are major contributors to air pollution.

[0004] Typically, lithium-ion batteries consist of an electrode assembly, which comprises a positive electrode, a negative electrode, and a separator immersed in a lithium electrolyte. Electrodes are formed by coating an electrode slurry containing active materials onto an electrode current collector. For this coating process, coating equipment such as a slot die coater is used.

[0005] The slit mold coating machine includes an upper mold block and a lower mold block forming a chamber for supplying electrode slurry, and shim members positioned between them to set the height and width of a slit through which the active material slurry is discharged. The space between the multiple shim members forms the slit. The height of the slit through which the active material slurry is discharged is determined by the height of the shim members, and the width of the slit is determined by the distance between the spaced-apart shim members.

[0006] When using a slot die coater to apply electrode paste, the edge shape varies depending on the extent of paste spread (slip length). When the paste spread is small, the slip length that reduces edge thickness becomes shorter, resulting in a thicker area than the average thickness. This increases the risk of breakage due to side rings during electrode winding and also increases the risk of N / P ratio reversal.

[0007] Conversely, when the electrode slurry spreads over a large area, the slip length increases, reducing the edge thickness. Therefore, the capacity decreases proportionally with the extension of the slip portion, and there is a risk of lithium deposition due to air trapping. Thus, various aspects of the electrode, including capacity, safety, and lifetime, are significantly affected by the slip length of the electrode slurry. To control this, techniques involving the simultaneous discharge of an insulating solution to the edge of the electrode slurry can be applied. The insulating solution acts as a dam to control the amount of electrode slurry spread, and by adjusting the discharge volume and width of the insulating solution, the electrode slurry spread can be controlled to an appropriate level.

[0008] Electrode slurry and insulating solution are simultaneously discharged onto the moving electrode. For this purpose, the gasket assembly of the slot die coater is equipped with an insulating solution flow path. For example, the gasket assembly can consist of two types: a main gasket and spacer gaskets, wherein multiple spacer gaskets are disposed in the internal hollow region of the main gasket. The space between the spacer gaskets forms a discharge slot for the electrode slurry, while the insulating solution is discharged via a concave insulating solution flow path formed on the surface of the spacer gasket.

[0009] In this type of slot die coating machine, the amount of insulating solution discharged is determined by the flow path of the insulating solution formed on the spacer shims. Therefore, to adjust or change the amount of insulating solution discharged, the slot die coating machine must be disassembled, and new spacer shims of different specifications should be installed. Adjusting the volume of insulating solution discharged by replacing spacer shims is cumbersome because various specifications of spacer shims must be prepared in advance, requiring careful design, manufacturing, and management of the spacer shims. Summary of the Invention

[0010] Technical issues

[0011] This disclosure aims to provide a slit mold coating machine that allows for easy control of the discharge volume of an insulating solution by adjusting the position of the spacer shims without replacing the shim components of the slit mold coating machine.

[0012] However, the technical problems solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of this disclosure set forth below that there are other problems not mentioned herein.

[0013] Technical solution

[0014] This disclosure relates to a slot die coating machine, and in one example, includes: a first die block having a manifold for receiving electrode paste; a second die block coupled to the first die block; and a coating machine pad inserted between the first die block and the second die block, wherein the coating machine pad includes: a main body pad surrounding two sides and a rear surface of the manifold; and a plurality of spacer pads spaced apart between the main body pads to traverse toward the front surface of the manifold, wherein concave insulating solution flow paths are formed on the surfaces of the plurality of spacer pads, wherein the plurality of spacer pads includes: a first spacer pad fixed in position relative to the main body pads; and a second spacer pad movable within the first spacer pad.

[0015] Therefore, the flow cross-sectional area of ​​the insulating solution flow path changes according to the movement of the second spacer gasket.

[0016] In one embodiment, the second spacer pad is capable of linear movement in the transverse direction (TD).

[0017] The first spacer gasket is equipped with a receiving portion having an open front surface, wherein the second spacer gasket is disposed within the receiving portion and may be equipped with a guide hole in the form of an elongated hole extending in the lateral direction to provide a tightening allowance relative to the retaining pin located within the receiving portion.

[0018] Here, the retaining pin can be set in the first mold block.

[0019] In addition, an insulating solution supply hole for supplying insulating solution to the insulating solution flow path can be formed within the first spacer gasket.

[0020] Additionally, the gap between the first spacer gasket and the second spacer gasket, which is open in the machine direction (MD) while communicating with the insulating solution supply hole, can form part of the end of the insulating solution flow path.

[0021] In another embodiment of this disclosure, the second spacer pad may be capable of performing a rotational motion in which the angle of the centerline relative to the machine direction changes.

[0022] The first spacer gasket is equipped with a receiving portion having an open front surface, wherein a second spacer gasket is disposed within the receiving portion and may be equipped with a rotating hole that is connected so that the second spacer gasket can perform a rotational movement relative to a fixed pin located inside the receiving portion.

[0023] Furthermore, an arc-shaped rotating contact surface with the center of curvature of the fixed pin as the center can be formed between the first spacer gasket and the second spacer gasket.

[0024] The fixing pin can be set on the first mold block.

[0025] In addition, an insulating solution supply hole for supplying insulating solution to the insulating solution flow path can be formed within the first spacer gasket.

[0026] Additionally, the gap between the first spacer gasket and the second spacer gasket, which is open in the machine direction while communicating with the insulating solution supply hole, can form part of the end of the insulating solution flow path.

[0027] Beneficial effects

[0028] In this way, the slit mold coating machine according to this disclosure can adjust the flow cross-sectional area of ​​the insulating solution flow path by moving the position of the second spacer shim without replacing the coating machine shim.

[0029] By adjusting the flow cross-sectional area, the discharge volume of the insulating solution can be easily changed, and the spreading degree of the electrode slurry can be appropriately controlled to improve electrode quality. Furthermore, since no separate gasket component is required to change the discharge volume of the insulating solution, maintenance and repair costs and time are saved.

[0030] However, the technical effects that can be obtained by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description of the invention that is not mentioned. Attached Figure Description

[0031] The following accompanying drawings illustrate preferred embodiments of the present disclosure and are used to further illustrate the technical ideas of the present disclosure in conjunction with the following detailed description of the present disclosure. The present disclosure should not be construed as being limited to the matters shown in these drawings.

[0032] Figure 1 This is a diagram illustrating an example of a conventional slot die coating machine.

[0033] Figure 2 yes Figure 1 An enlarged view of part "A".

[0034] Figure 3 This is a diagram illustrating the sliding control achieved by simultaneously discharging electrode slurry and insulating solution.

[0035] Figure 4 This is a diagram illustrating the structure of a spacer pad according to an embodiment of the present disclosure.

[0036] Figure 5 It shows the use Figure 4 A diagram illustrating an example of how spacer pads adjust the width of the insulating solution flow path.

[0037] Figure 6 This is a diagram illustrating the structure of a spacer pad according to another embodiment of the present disclosure.

[0038] Figure 7 It shows through Figure 6 A diagram illustrating an example of how spacer pads reduce the width of the insulating solution flow path.

[0039] Figure 8 It shows through Figure 6 A diagram illustrating an example of how spacer pads widen the flow path of the insulating solution.

[0040] [Symbol Explanation]

[0041] 10: Slit mold coating machine; 12: Front surface

[0042] 14: Lip edge 20: Slit

[0043] 30: Insulating solution slit; 100: First mold block.

[0044] 110: Manifold 120: Retaining pin

[0045] 200: Second mold block; 300: Coating machine gasket.

[0046] 310: Main body gasket; 320: Spacer gasket

[0047] 330: First spacer gasket; 332: Receiving part

[0048] 334: Insulating solution supply port

[0049] 336: Flow path of insulating solution

[0050] 340: Second spacer gasket; 342: Guide hole

[0051] 344: Rotary hole

[0052] 350: Rotational contact surface

[0053] S: Gap; CL: Centerline

[0054] TD: Lateral direction; MD: Machine direction Detailed Implementation

[0055] This disclosure can be modified in various ways and can have many embodiments, some of which are described in detail below.

[0056] However, this is not intended to limit this disclosure to any particular embodiment and should be understood to include all modifications, equivalents or substitutions that fall within the spirit and technical scope of this disclosure.

[0057] In this disclosure, the terms “comprising” or “having” are intended to specify the presence of the described features, quantities, steps, actions, components, parts or combinations thereof, and are not intended to exclude the possibility of the presence or addition of one or more other features, quantities, steps, actions, components, parts or combinations thereof.

[0058] Furthermore, when this disclosure describes layers, films, regions, plates, etc., as being "on" another part, this includes not only when it is "directly above" the other part, but also when there is another part between them. Conversely, when layers, films, regions, plates, etc., are described as being "below" another, this includes not only when it is "directly below" the other, but also when there is another part between them. Additionally, in this application, when a component is disposed "on" another component, this can include not only being disposed on the upper part, but also being disposed on the lower part.

[0059] This disclosure relates to a slot die coating machine, and in one example, includes: a first die block having a manifold for receiving electrode slurry; a second die block coupled to the first die block; and a coating machine pad inserted between the first die block and the second die block, wherein the coating machine pad includes: a main body pad surrounding two sides and a rear surface of the manifold; and a plurality of spacer pads spaced apart between the main body pads to traverse toward the front surface of the manifold, wherein concave insulating solution flow paths are formed on the surfaces of the plurality of spacer pads, wherein the spacer pads include: a first spacer pad fixed in position relative to the main body pads; and a second spacer pad movable within the first spacer pad.

[0060] Therefore, the slit mold coating machine of this disclosure depends on the positional movement of the second spacer shim to change the flow cross-sectional area of ​​the insulating solution flow path.

[0061] Therefore, the slit mold coating machine according to this disclosure can adjust the flow cross-sectional area of ​​the insulating solution flow path by moving the position of the second spacer shim without replacing the coating machine shim.

[0062] By adjusting the flow cross-sectional area, the discharge volume of the insulating solution can be easily changed, and the spreading degree of the electrode slurry can be appropriately controlled to improve electrode quality. Furthermore, since no separate gasket component is required to change the discharge volume of the insulating solution, maintenance and repair costs and time are saved.

[0063] [Mode for performing the invention]

[0064] Hereinafter, with reference to the accompanying drawings, a specific embodiment of the insulating solution flow structure of the slot die coating machine according to the present disclosure will be described in detail. Note that the relative positions indicated by terms such as "front / back" and "up / down / left / right" in the following description are for the purpose of understanding the present disclosure, and unless otherwise stated, the directions shown in the drawings are used as reference directions.

[0065] [First Embodiment]

[0066] Figure 1 This is a diagram illustrating an example of a conventional slot die coating machine 10. For ease of understanding of this disclosure, reference will first be made to... Figure 1 Describe the typical structure of the slot die coating machine 10.

[0067] Figure 1 This is an exploded perspective view of a slot die coating machine 10, which includes a first die block 100, a second die block 200, and a coating machine gasket 300. Here, the first die block 100, the second die block 200, and the coating machine gasket 300 are the main components of the slot die coating machine 10, and for clarity, auxiliary components such as fastening bolts and pipes are omitted from the figure.

[0068] The first mold block 100 is a block corresponding to half of the main body of the slit mold coating machine 10, and the first mold block 100 includes a manifold 110 for receiving electrode paste. The second mold block 200 is a block corresponding to the remaining half of the main body of the slit mold coating machine 10. The first mold block 100 and the second mold block 200 are fastened together to form a single slit mold coating machine 10.

[0069] Based on the orientation shown in the figure, the first mold block 100 can also be referred to as the lower mold block, and the second mold block 200 can also be referred to as the upper mold block. The first mold block 100 and the second mold block 200 are connected by a plurality of fastening bolts not shown, thereby allowing them to be disassembled and reassembled. In addition, a coating machine gasket 300 is positioned between the first mold block 100 and the second mold block 200.

[0070] The coating machine gasket 300 seals the mating surface between the first mold block 100 and the second mold block 200. The coating machine gasket 300 prevents leakage of the electrode paste pressurized into the manifold 110. Additionally, the coating machine gasket 300 forms a slit 20 on the front surface 12 of the slit die coating machine 10 for discharging the electrode paste. Typically, the front surface 12 of the slit die coating machine 10 includes a protrusion referred to as a lip 14, and the slit 20 is formed along the lip 14.

[0071] In the slit-die coating machine 10 shown, the coating machine gasket 300 includes a main gasket 310 and a plurality of spacer gaskets 320. The main gasket 310 can be formed into a curved shape around the two sides and rear surface of the manifold 110. The main gasket 310 is primarily used to seal the electrode paste over a wide area. The plurality of spacer gaskets 320 are spaced apart between the main gaskets 310 and arranged to extend across the manifold 110 toward the front surface 12 (i.e., the lip of the slit-die coating machine). Two spacer gaskets 320 adjacent to each other at their ends in the lateral direction (TD) are pressed tightly against the main gasket 310 to prevent electrode paste leakage.

[0072] The main gasket 310 and the spacer gaskets 320 are substantially the same thickness, and this thickness defines the height of the electrode slurry through which it is discharged in the slit 20. The width of the slit 20 is defined by the spacing between the spacer gaskets 320. In the illustrated embodiment, the coating machine gasket 300 has a structure including the main gasket 310 and a plurality of spacer gaskets 320, because replacing the spacer gaskets 320 instead of the entire coating machine gasket 300 is more efficient in terms of maintenance effort and cost. The corners of the spacer gaskets 320 are subjected to pressure from the electrode slurry, and therefore their lifespan is limited due to deformation or wear. Therefore, replacing only the spacer gaskets 320 has many advantages. However, in the embodiments of this disclosure described below, it is not excluded that the main gasket 310 and the spacer gaskets 320 are integrally arranged.

[0073] Figure 1 The spacer 320 shown is equipped with an insulating solution flow path 336 for discharging an insulating solution along with the electrode slurry. Figure 2 yes Figure 1 An enlarged view of section “A” shows in detail the spacer gasket 320 equipped with an insulating solution flow path 336.

[0074] like Figure 2 As shown, the spacer 320 has a concave insulating solution flow path 336 formed on its surface. The insulating solution flow path 336 has a narrow groove shape. One end of the insulating solution flow path 336 is connected to an insulating solution supply hole 334 for supplying insulating solution, and the other end of the insulating solution flow path 336 extends toward and opens toward the front surface 12 (i.e., lip 14) of the slot die coater 10. The other end of the open insulating solution flow path 336 forms an insulating solution slot 30.

[0075] According to the structure of the coating machine gasket 300, the electrode paste, pressurized and filled into the manifold 110, is discharged to the outside of the lip 14 through the slits 20 between the spacer gaskets 320 spaced apart across the manifold 110. Additionally, through the insulating solution flow path 336 formed in the spacer gaskets 320, the insulating solution is simultaneously discharged toward both corners of the electrode paste discharged from the slits 20. This simultaneous discharge of the insulating solution controls the degree of electrode paste spreading, i.e., the sliding length of the electrode paste.

[0076] Figure 3 This diagram illustrates slip control achieved through the simultaneous discharge of electrode slurry and insulating solution. The discharged electrode slurry spreads in the lateral direction (TD) due to its own fluidity, and the degree of spreading is suppressed by the insulating solution discharged at adjacent corners. In other words, the insulating solution acts as a dam to suppress the spreading of the electrode slurry, and the degree of spreading of the electrode slurry can be controlled by adjusting the discharge volume and width of the insulating solution to control the height and width of the dam. Therefore, the discharge volume and width of the insulating solution are important factors in electrode slurry and slip control.

[0077] In conventional methods, when simultaneously discharging electrode slurry and insulating solution, adjusting the discharge volume and width of the insulating solution requires replacing the entire coating machine gasket 300, which forms the insulating solution flow path 336, or at least the spacer gasket 320 that forms the insulating solution flow path 336. However, adjusting the insulating solution discharge volume by replacing the spacer gasket 320 requires pre-fabricating spacer gaskets 320 of various specifications, making the design, manufacture, and management of the spacer gasket 320 cumbersome.

[0078] This disclosure provides a spacer gasket 320 to solve these problems, and Figure 4 The structure of a spacer pad 320 according to an embodiment of the present disclosure is shown. Figure 4 The spacer 320 is designed to adjust the discharge volume and width of the insulating solution by changing the flow cross-sectional area of ​​the insulating solution flow path 336.

[0079] refer to Figure 4 The spacer 320 shown includes a first spacer 330 fixedly mounted relative to the main spacer 310 and a second spacer 340 movable within the first spacer 330. An insulating solution flow path 336 is formed along the boundary between the first spacer 330 and the second spacer 340. Therefore, as the distance between the second spacer 340 and the fixed first spacer 330 changes, that is, as the position of the second spacer 340 relative to the first spacer 330 moves, the flow cross-sectional area of ​​the insulating solution flow path 336 changes.

[0080] exist Figure 4 In the illustrated embodiment, the second spacer 340 is configured to move linearly in the transverse direction (TD). Here, the transverse direction (TD) refers to the direction corresponding to the transverse direction of travel of the electrode relative to the slit 20 discharging the electrode slurry and the slit mold coating machine 10. As the second spacer 340 moves linearly along the transverse direction (TD), the flow cross-sectional area of ​​the insulating solution flow path 336 increases or decreases.

[0081] For example, the first spacer 330 has a receiving portion 332 with an open front surface, and the second spacer 340 can be placed inside the receiving portion 332. The receiving portion 332 includes a retaining pin 120, and the second spacer 340 may have a guide hole 342 that is elongated in the transverse direction (TD) to provide a tightening allowance relative to the retaining pin 120. The guide hole 342 of the second spacer 340 is inserted into the retaining pin 120, and because the guide hole 342 is elongated in the transverse direction (TD), the second spacer 340 can move linearly in the transverse direction (TD).

[0082] Assembly of the slit mold coating machine 10 is typically performed by mounting the coating machine shim 300 onto the first mold block 100, placing the second mold block 200 on top of it, and securing them together with fastening bolts to apply sufficient pressure to the coating machine shim 300. In the coating machine shim 300, the main body shim 310 and the first spacer shim 330, which maintain a fixed position, are aligned at predetermined positions on the first mold block 100 by retaining pins 120 and / or retaining bolts (not shown). The mounting position of the second spacer shim 340 is determined relative to the first spacer shim 330 to ensure precise positioning; retaining pins 120 inserted into guide holes 342 of the second spacer shim 340 may also be provided on the first mold block 100.

[0083] Furthermore, an insulating solution supply flow path for supplying insulating solution from the outside can be provided on the first mold block 100, and correspondingly, an insulating solution supply hole 334 forming one end of the insulating solution flow path 336 can be formed inside the first spacer gasket 330. Considering the sealing of the pressurized insulating solution, it is preferable that the insulating solution supply hole 334 is formed within the fixed first spacer gasket 330.

[0084] Furthermore, the insulating solution flow path 336 extends from the insulating solution supply hole 334 toward the front surface of the slot die coating machine 10, and the gap S between the first spacer pad and the second spacer pad, which is open toward the machine direction MD while communicating with the insulating solution supply hole 334, can form part of the end of the insulating solution flow path 336. Here, the machine direction (MD) is the direction perpendicular to the aforementioned transverse direction (TD) and corresponds to the direction of travel of the electrode on which the electrode paste is applied.

[0085] Figure 5 It shows through Figure 4 The diagram illustrates an example of how the spacer 320 adjusts the width of the insulating solution flow path 336. A gap S, open in the machine direction (MD) between the first spacer 330 and the second spacer 340, forms part of the end of the insulating solution flow path 336. In this structure of the insulating solution flow path 336, the gap S between the first spacer 330 and the second spacer 340, open in the machine direction (MD), changes as the second spacer 340 moves linearly in the lateral direction (TD). Finally, as the second spacer 340 moves in the lateral direction (TD), the flow cross-sectional area of ​​the insulating solution flow path 336 changes, thereby adjusting the discharge volume and width of the insulating solution and controlling the degree of electrode slurry spreading.

[0086] [Second Embodiment]

[0087] Figure 6 This is a diagram illustrating the structure of a spacer pad 320 according to a second embodiment of the present disclosure. The coating machine pad 300 comprises a main pad 310 and a spacer pad 320. The spacer pad 320 includes a first spacer pad 330 fixedly mounted relative to the main pad 310 and a second spacer pad 340 capable of positional movement within the fixedly mounted first spacer pad 330, which is equivalent to the first embodiment. However, in the second embodiment, the movement structure or method of the second spacer pad 340 is different. In the following description, content overlapping with that in the first embodiment is omitted, and the focus is on describing the movement structure of the second spacer pad 340.

[0088] refer to Figure 6 The second spacer shim 340 can perform a rotational movement in which the angle of its centerline CL changes relative to the machine direction (MD). Here, the centerline CL is a virtual line representing the length of the second spacer shim 340 along the machine direction (MD). In a second embodiment, the second spacer shim 340 can perform a rotational movement that keeps its centerline CL parallel to or tilted relative to the machine direction (MD).

[0089] Specifically, the first spacer 330 has a receiving portion 332 with an open front surface, and a second spacer 340 is disposed inside the receiving portion 332. Furthermore, the second spacer 340 is provided with a rotation hole 344, which allows rotational movement relative to the retaining pin 120 located within the receiving portion 332. Unlike the first embodiment, the rotation hole 344 is formed in a circular shape corresponding to the cross-sectional shape of the retaining pin 120, and has only a minimum tightening margin sufficient to allow rotational movement relative to the retaining pin 120.

[0090] In this configuration, the second spacer shim 340 can rotate within a certain angle centered on the fixing pin 120. As a result, the angle of the centerline CL of the second spacer shim 340 relative to the machine direction (MD) changes. Figure 7 This is a diagram illustrating an example of reducing the width of the insulating solution flow path 336 by rotating the second spacer 340, and Figure 8 This figure illustrates an example of widening the insulating solution flow path 336 in the opposite manner. As clearly understood from the figure, when the second spacer 340 rotates in a direction that reduces the gap S between the first spacer 330 and the second spacer 340, the width of the insulating solution flow path 336 decreases. Conversely, when the second spacer 340 rotates in a direction that widens the gap S between the first spacer 330 and the second spacer 340, the width of the insulating solution flow path 336 increases. In this way, the flow cross-sectional area of ​​the insulating solution flow path 336 can also be changed by the rotational movement of the second spacer 340.

[0091] Depending on the embodiment, an arcuate rotary contact surface 350 may be formed between the first spacer gasket 330 and the second spacer gasket 340, with the center of the retaining pin 120 as the center of curvature. The rotary contact surface 350 accurately guides the rotational movement of the second spacer gasket 340. Furthermore, the rotary contact surface 350 ensures that the seal between the first spacer gasket 330 and the second spacer gasket 340 remains in good condition, regardless of the rotation angle of the second spacer gasket 340.

[0092] Furthermore, a fixing pin 120 forming the rotation center can be provided on the first mold block 100, and an insulating solution supply hole 334 for supplying insulating solution to the insulating solution flow path 336 can be formed inside the first spacer 330. The gap S between the first spacer 330 and the second spacer 340, which is open in the machine direction (MD) and communicates with the insulating solution supply hole 334, can form part of the end of the insulating solution flow path 336, as described in the first embodiment.

[0093] The present disclosure has been described in more detail above with reference to the accompanying drawings and embodiments. However, it should be understood that the configurations shown in the drawings or embodiments described herein are merely one embodiment of the present disclosure and do not represent all the technical concepts of the present disclosure, and various equivalents and modifications may exist that can replace them at the time of submission of this disclosure.

Claims

1. A slot die coating machine, comprising: A first mold block is provided with a manifold for containing electrode paste; A second mold block is incorporated into the first mold block; as well as A coating machine gasket inserted between the first mold block and the second mold block, wherein... The coating machine pad includes: A main gasket surrounding the two sides and rear surface of the manifold, and a plurality of spacer gaskets spaced apart between the main gaskets to traverse towards the front surface of the manifold, wherein concave insulating solution flow paths are formed on the surfaces of the plurality of spacer gaskets, wherein The plurality of spacer pads include: A first spacer pad fixed in position relative to the main spacer pad, and a second spacer pad movable within the first spacer pad.

2. The slit mold coating machine according to claim 1, wherein... The flow cross-sectional area of ​​the insulating solution flow path changes according to the movement of the position of the second spacer gasket.

3. The slit mold coating machine according to claim 2, wherein... The second spacer pad is capable of linear movement in the transverse direction (TD).

4. The slit mold coating machine according to claim 3, wherein... The first spacer pad is equipped with a receiving portion having an open front surface, wherein The second spacer gasket is disposed within the receiving portion and is equipped with an elongated guide hole extending in the lateral direction to provide a tightening allowance relative to the retaining pin located within the receiving portion.

5. The slit mold coating machine according to claim 4, wherein... The fixing pin is disposed in the first mold block.

6. The slit mold coating machine according to claim 3, wherein... An insulating solution supply hole for supplying insulating solution to the flow path of the insulating solution is formed in the first spacer gasket.

7. The slit mold coating machine according to claim 6, wherein... The gap between the first spacer pad and the second spacer pad, which is open in the machine direction (MD) while communicating with the insulating solution supply hole, forms part of the end of the insulating solution flow path.

8. The slit mold coating machine according to claim 2, wherein... The second spacer pad is capable of performing a rotational motion in which the angle of its centerline relative to the machine direction changes.

9. The slit mold coating machine according to claim 8, wherein... The first spacer pad is equipped with a receiving portion having an open front surface, wherein The second spacer shim is disposed within the receiving portion and is equipped with a rotating hole, which is connected such that the second spacer shim can rotate relative to a fixing pin located inside the receiving portion.

10. The slit mold coating machine according to claim 9, wherein... An arc-shaped rotating contact surface with the center of the fixing pin as the center of curvature is formed between the first spacer pad and the second spacer pad.

11. The slit mold coating machine according to claim 9, wherein... The fixing pin is disposed on the first mold block.

12. The slit mold coating machine according to claim 9, wherein... An insulating solution supply hole for supplying the insulating solution to the flow path of the insulating solution is formed in the first spacer gasket.

13. The slit mold coating machine according to claim 12, wherein... The gap between the first spacer pad and the second spacer pad, which is open in the machine direction while communicating with the insulating solution supply hole, forms part of the end of the insulating solution flow path.

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