Slot Die Coater

Abstract

The technical idea of ​​the present invention provides a slot die coater including: a die block including a first block having a manifold for containing a coating liquid and a second block on the first block; and a coater shim between the first block and the second block, wherein the coater shim includes a first guide plate and a second guide plate spaced apart in a first direction with the manifold therebetween; the first guide plate and the second guide plate each including a master shim that does not cover the manifold; a first auxiliary shim on one side of the first guide plate and including a first inner region that overlaps a first edge of the manifold; and a second auxiliary shim on one side of the second guide plate and including a second inner region that overlaps a second edge of the manifold.

Description

[Technical Field]

[0001] The present invention relates to a slot die coater, and more particularly to a slot die coater including a coater shim.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0127703, filed on September 25, 2023, and all contents disclosed in the documents of said Korean patent application are incorporated herein by reference. [Background technology]

[0003] As technological development and demand for mobile devices continues to grow, the demand for secondary batteries as energy sources is rapidly increasing. These secondary batteries essentially include an electrode assembly, which is a power-generating element. An electrode assembly is formed by stacking a positive electrode, a separator, and a negative electrode at least once. The positive electrode and negative electrode are fabricated by coating and drying a positive electrode active material slurry and a negative electrode active material slurry on current collectors made of aluminum foil and copper foil, respectively. To ensure consistent charge / discharge characteristics of secondary batteries, the positive electrode active material slurry and the negative electrode active material slurry must be uniformly coated on the current collectors, which is typically done using a slot die coater. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that the present invention aims to achieve is to provide a slot die coater that includes a coater shim. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, a technical idea according to one embodiment of the present invention provides a slot die coater including: a die block including a first block having a manifold for containing a coating liquid and a second block on the first block; and a coater shim between the first block and the second block, the coater shim including a first guide plate and a second guide plate spaced apart in a first direction with the manifold therebetween, the first guide plate and the second guide plate each including a master shim that does not cover the manifold; a first auxiliary shim on one side of the first guide plate and including a first inner region that overlaps a first edge of the manifold; and a second auxiliary shim on one side of the second guide plate and including a second inner region that overlaps a second edge of the manifold.

[0006] In an exemplary embodiment, the master shim further includes a base plate having one end connected to the first guide plate and the other end connected to the second guide plate, the first auxiliary shim extending from the base plate along one side of the first guide plate toward the outlet of the die block, and the second auxiliary shim extending from the base plate along one side of the second guide plate toward the outlet of the die block.

[0007] In an exemplary embodiment, the width of the first inner region of the first auxiliary shim in the first direction and the width of the second inner region of the second auxiliary shim in the first direction are each between 4 mm and 300 mm.

[0008] In an exemplary embodiment, the first auxiliary shim further includes a first outer region located between the manifold and the first guide plate, and the second auxiliary shim further includes a second outer region located between the manifold and the first guide plate, and the width of the first outer region of the first auxiliary shim in the first direction and the width of the second outer region of the second auxiliary shim in the first direction are each between 5 mm and 50 mm.

[0009] In an exemplary embodiment, the first auxiliary shim includes a first hole into which a first fastening member configured to fasten the first auxiliary shim to the first block is inserted, and the second auxiliary shim includes a second hole into which a second fastening member configured to fasten the second auxiliary shim to the first block is inserted, and the first hole and the second hole are each a slot hole whose length in the first direction is smaller than its length in a second direction perpendicular to the first direction.

[0010] In an exemplary embodiment, an end of the first auxiliary shim and an end of the second auxiliary shim are each spaced apart from an end of the first block in the second direction.

[0011] In an exemplary embodiment, the locking mechanism further includes a first fixing pin that passes through a first pin hole of the first auxiliary shim and is inserted into a corresponding hole of the first block, a first bolt that passes through a first bolt hole of the first auxiliary shim and is fastened to the corresponding hole of the first block, a second fixing pin that passes through a second pin hole of the second auxiliary shim and is inserted into the corresponding hole of the first block, and a second bolt that passes through the second bolt hole of the second auxiliary shim and is fastened to the corresponding hole of the first block, wherein the first pin hole, the second pin hole, the first bolt hole, and the second bolt hole are each a slot hole whose length in the first direction is shorter than its length in a second direction perpendicular to the first direction.

[0012] In an exemplary embodiment, in a plan view, the first auxiliary shim and the second auxiliary shim each have a rectangular shape with a uniform width in the first direction.

[0013] In an exemplary embodiment, at least one of the first auxiliary shim and the second auxiliary shim includes a region whose width decreases adjacent to the outlet of the die block.

[0014] In an exemplary embodiment, at least one of the first auxiliary shim and the second auxiliary shim includes a region that increases in width adjacent the outlet of the die block.

[0015] In an exemplary embodiment, the first auxiliary shim and the second auxiliary shim do not vertically overlap the master shim, and the distance between the first auxiliary shim and the second auxiliary shim in the first direction is smaller than the width of the manifold in the first direction.

[0016] In order to solve the above-mentioned problems, a technical idea according to one embodiment of the present invention includes a die block including a first block having a manifold for accommodating a coating liquid and a second block on the first block, and a coater shim between the first block and the second block, the coater shim including a base plate extending in a first direction, a first guide plate extending from the base plate in a second direction toward an outlet of the die block, and a second guide plate extending from the base plate in the second direction toward the outlet of the die block, the first guide plate and the second guide plate being spaced apart from each other in the first direction and including a master shim and a first fastening member. a first auxiliary shim fastened to the first block by a first fastening member and including a first hole into which the first fastening member is inserted, and a second auxiliary shim fastened to the first block by a second fastening member and including a second hole into which the second fastening member is inserted, the first auxiliary shim and the second auxiliary shim being located between the first guide plate and the second guide plate, the length of the first hole of the first auxiliary shim in the second direction being greater than the length of the first hole of the first auxiliary shim in the first direction, and the length of the second hole of the second auxiliary shim in the second direction being greater than the length of the second hole of the second auxiliary shim in the first direction.

[0017] In an exemplary embodiment, an end of the first auxiliary shim and an end of the second auxiliary shim are each spaced apart from an end of the first block in the second direction.

[0018] In an exemplary embodiment, the first auxiliary shim and the second auxiliary shim each extend in the second direction from the base plate toward the discharge port of the die block.

[0019] In an exemplary embodiment, the first auxiliary shim is connected to one side surface of the first guide plate, and the second auxiliary shim is connected to one side surface of the second guide plate. [Effects of the Invention]

[0020] According to an exemplary embodiment of the present invention, the coater shim includes a master shim, a first auxiliary shim, and a second auxiliary shim, and both edges of the manifold provided to the die block are completely covered by the first auxiliary shim and the second auxiliary shim, thereby preventing the coating liquid provided from the manifold from leaking to other parts other than the slot of the slot die coater.

[0021] Furthermore, according to an exemplary embodiment of the present invention, the holes in the first and second auxiliary shims for fastening the shims to the die block are configured as slot holes extending in the direction of discharging the coating liquid, thereby enabling adjustment of the offset distance in response to grinding or deformation of the die block. This eliminates the need to re-manufacture the coater shims every time grinding or deformation of the die block occurs, thereby reducing the process costs of using a slot die coater.

[0022] The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood from the following description by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong. In other words, unintended effects accompanying the implementation of the exemplary embodiments of the present disclosure can also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a cross-sectional view illustrating a slot die coater according to an exemplary embodiment of the present invention. [Figure 2] FIG. 1 is an exploded perspective view illustrating a slot die coater according to an exemplary embodiment of the present invention. [Figure 3] FIG. 2 is a plan view showing a coater shim of a slot die coater according to an exemplary embodiment of the present invention. [Figure 4] FIG. 1 is a plan view illustrating a portion of a slot die coater according to an exemplary embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view taken along the line AA-AA′ in FIG. 4. [Figure 6] FIG. 1 is a plan view illustrating a portion of a slot die coater according to an exemplary embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional view taken along the line BB-BB' in FIG. [Figure 8] FIG. 1 is a plan view illustrating a portion of a slot die coater according to an exemplary embodiment of the present invention. [Figure 9] FIG. 1 is a plan view illustrating a portion of a slot die coater according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Before that, it should be noted that the terms and words used in the specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to best describe his / her own invention.

[0025] Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0026] Furthermore, in the description of the present invention, if it is determined that a detailed description of related publicly known structures or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0027] The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and therefore the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown in a schematic manner for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0028] (First embodiment) Fig. 1 is a cross-sectional view showing a slot die coater 10 according to an exemplary embodiment of the present invention. Fig. 2 is an exploded perspective view showing the slot die coater 10 according to an exemplary embodiment of the present invention. Fig. 3 is a plan view showing a coater shim 200 of the slot die coater 10 according to an exemplary embodiment of the present invention.

[0029] 1 to 3, the slot die coater 10 may be configured to apply a coating liquid 420 onto a substrate 410 moving by a coating roll 310. In an exemplary embodiment, the substrate 410 is a current collector, and the coating liquid 420 may include an electrode slurry. The electrode slurry may include a positive electrode active material slurry and a negative electrode active material slurry. While the coating roll 310 transports the substrate 410 along a predetermined path, the coating liquid 420 discharged from the slot die coater 10 may form a coating layer applied to one side of the substrate 410.

[0030] The slot die coater 10 may include a die block 100 including a first block 110 and a second block 120, and a coater shim 200 interposed between the first block 110 and the second block 120. The coater shim 200 may be interposed between the first block 110 and the second block 120 and may have a slot 130 formed therein, the slot 130 corresponding to a passage through which the coating liquid 420 flows. The slot 130 may be in communication with an outlet 140 of the die block 100 through which the coating liquid 420 is discharged.

[0031] The first block 110 may include a manifold 111 that accommodates the coating liquid 420. The manifold 111 may be a space recessed from the top surface of the first block 110 and may communicate with a slot 130 between the first block 110 and the second block 120. When a direction parallel to the ejection direction of the coating liquid 420 is defined as a second direction (e.g., X direction) and a direction perpendicular to the ejection direction of the coating liquid 420 is defined as a first direction (e.g., Y direction), the length of the manifold 111 along the first direction (e.g., Y direction) may be greater than the length of the manifold 111 along the second direction (e.g., X direction). A liquid supply unit external to the die block 100 may supply the coating liquid 420 to the manifold 111 of the first block 110. When the manifold 111 is filled with the coating liquid 420, the coating liquid 420 flows along the slot 130 to the discharge port 140 of the die block 100 and is discharged through the discharge port 140 of the die block 100 in the discharge direction (for example, the X direction).

[0032] The coater shim 200 may include a master shim 201 , a first auxiliary shim 240 , and a second auxiliary shim 250 .

[0033] The master shim 201 may be disposed between the first block 110 and the second block 120 and may be fastened and fixed to the die block 100. The master shim 201 may have a generally uniform thickness. The master shim 201 may be fastened and fixed to the upper surface of the first block 110. The master shim 201 may be fastened and fixed to the first block 110 so as not to cover the manifold 111 or to not overlap the manifold 111 in a vertical direction (e.g., in the Z direction).

[0034] The master shim 201 may include a base plate 210, a first guide plate 220, and a second guide plate 230. The master shim 201 may be a single piece, and the base plate 210, the first guide plate 220, and the second guide plate 230 may be integral with one another. The base plate 210 may extend in a first direction (e.g., the Y direction) on the first block 110. The first guide plate 220 may be connected to one end of the base plate 210 along the first direction (e.g., the Y direction) and extend in a second direction (e.g., the X direction) from the one end of the base plate 210 along the first direction (e.g., the Y direction) toward the end of the die block 100 where the discharge port 140 is provided. The second guide plate 230 may be connected to the other end of the base plate 210 in a first direction (e.g., Y direction) and may extend in a second direction (e.g., X direction) from the other end of the base plate 210 in the first direction (e.g., Y direction) toward an end of the die block 100 where the discharge port 140 is provided. The first guide plate 220 and the second guide plate 230 may be spaced apart in the first direction (e.g., Y direction) with the manifold 111 therebetween. The first guide plate 220 and the second guide plate 230 may be disposed so as not to cover the manifold 111. The first guide plate 220 and the second guide plate 230 may each have a rectangular shape with a uniform width in the first direction (e.g., Y direction).

[0035] The first auxiliary shim 240 and the second auxiliary shim 250 can each be fastened and fixed to the die block 100. The first auxiliary shim 240 and the second auxiliary shim 250 can each have a generally uniform thickness. The first auxiliary shim 240 and the second auxiliary shim 250 can each be fastened and fixed to the upper surface of the first block 110. The first auxiliary shim 240 and the second auxiliary shim 250 can be located on the same plane as the master shim 201. The first auxiliary shim 240 and the second auxiliary shim 250 are provided in a lateral direction (e.g., X direction and / or Y direction) of the master shim 201 and do not overlap in a vertical direction (e.g., Z direction).

[0036] The first auxiliary shim 240 may be disposed on one side of the first guide plate 220, and the second auxiliary shim 250 may be disposed on one side of the second guide plate 230. One side of the first auxiliary shim 240 may contact one side of the first guide plate 220, and the first auxiliary shim 240 may extend continuously along one side of the first guide plate 220. The first auxiliary shim 240 may extend in a second direction (e.g., the X direction) from the base plate 210 toward an end of the die block 100. One side of the second auxiliary shim 250 may contact one side of the second guide plate 230, and the second auxiliary shim 250 may extend continuously along one side of the second guide plate 230. The second auxiliary shim 250 may extend in a second direction (e.g., the X direction) from the base plate 210 toward an end of the die block 100. The first auxiliary shim 240 and the second auxiliary shim 250 may each have a rectangular shape with a uniform width along a first direction (eg, the Y direction).

[0037] The first auxiliary shim 240 and the second auxiliary shim 250 may be spaced apart in a first direction (e.g., the Y direction). The slot 130 may be understood as the space between the first auxiliary shim 240 and the second auxiliary shim 250. The width of the slot 130 along the first direction (e.g., the Y direction) may correspond to the distance along the first direction (e.g., the Y direction) between the first auxiliary shim 240 and the second auxiliary shim 250. The width of the slot 130 along the first direction (e.g., the Y direction) may be smaller than the width of the manifold 111 along the first direction (e.g., the Y direction).

[0038] The first auxiliary shim 240 and the second auxiliary shim 250 can each cover a portion of the manifold 111. The first auxiliary shim 240 can include a first inner region 241 that covers or overlaps a first edge of the manifold 111, and a first outer region 242 that is between the manifold 111 and the first guide plate 220 in a first direction (e.g., the Y direction). The second auxiliary shim 250 can include a second inner region 251 that covers or overlaps a second edge of the manifold 111, and a second outer region 252 that is between the manifold 111 and the second guide plate 230 in the first direction (e.g., the Y direction). The first inner region 241 of the first auxiliary shim 240 can be referred to as a first overlapping region, and the second inner region 251 of the second auxiliary shim 250 can be referred to as a second overlapping region. The first edge and second edge of the manifold 111 are opposite ends of the manifold 111 along a first direction (e.g., the Y direction), and the coating liquid 420 is supplied to the slot 130 through the center of the manifold 111 between the first edge and the second edge of the manifold 111.

[0039] In the slot die coater according to the comparative example, the boundary between the auxiliary shim and the master shim is located on the manifold, and in this case, the coating liquid flowing out from the manifold may leak into the gap between the auxiliary shim and the master shim. Such leakage of the coating liquid may cause internal contamination of the slot die coater and reduce the uniformity of the coating process.

[0040] However, according to an exemplary embodiment of the present invention, both edges of manifold 111 are completely covered by first auxiliary shim 240 and second auxiliary shim 250, and the boundaries between first auxiliary shim 240, second auxiliary shim 250 and master shim 201 are located outside manifold 111. This prevents coating liquid 420 provided from manifold 111 from leaking to areas other than slots 130.

[0041] In an exemplary embodiment, the width W1 of the first inner region 241 of the first auxiliary shim 240 along the first direction (e.g., the Y direction) and the width W3 of the second inner region 251 of the second auxiliary shim 250 along the first direction (e.g., the Y direction) may be between 4 mm and 300 mm. If the width of the overlapping region between the auxiliary shim and the manifold 111 is too small, there is a risk of a large deviation in the thickness of the coating liquid 420 applied to the substrate 410. For example, the width W1 of the first inner region 241 of the first auxiliary shim 240 along the first direction (e.g., the Y direction) and the width W3 of the second inner region 251 of the second auxiliary shim 250 along the first direction (e.g., the Y direction) may be 6 mm or more, 8 mm or more, 10 mm or more, 12 mm or more, 14 mm or more, or 16 mm or less, respectively. For example, the width W1 of the first inner region 241 of the first auxiliary shim 240 along the first direction (e.g., the Y direction) and the width W3 of the second inner region 251 of the second auxiliary shim 250 along the first direction (e.g., the Y direction) may be 30% or less, 25% or less, or 20% or less of the width of the manifold 111 along the first direction (e.g., the Y direction), respectively.

[0042] In an exemplary embodiment, the width W2 of the first outer region 242 of the first auxiliary shim 240 along the first direction (e.g., the Y direction) and the width W4 of the second outer region 252 of the second auxiliary shim 250 along the first direction (e.g., the Y direction) may be between 5 mm and 50 mm. When the width W2 of the first outer region 242 of the first auxiliary shim 240 and the width W4 of the second outer region 252 of the second auxiliary shim 250 are configured to be 5 mm or more, it is possible to effectively prevent the coating liquid 420 provided from the manifold 111 from leaking to portions other than the slots 130.

[0043] (Second embodiment) Fig. 4 is a plan view showing a portion of a slot die coater 10 according to an exemplary embodiment of the present invention. Fig. 5 is a cross-sectional view taken along line AA-AA' in Fig. 4. Fig. 6 is a plan view showing a portion of a slot die coater 10 according to an exemplary embodiment of the present invention. Fig. 7 is a cross-sectional view taken along line BB-BB' in Fig. 6.

[0044] Referring to Figures 4 to 7 together with Figures 1 to 3, the first auxiliary shim 240 can be fastened and fixed to the first block 110 by at least one first fastening member (e.g., a first fixing pin 151 and a first bolt 153).

[0045] In the exemplary embodiment, the first auxiliary shim 240 may be fastened and fixed to the first block 110 by a first fixing pin 151 and a first bolt 153. The first auxiliary shim 240 may include a first pin hole 243 into which the first fixing pin 151 is inserted and a first bolt hole 245 into which the first bolt 153 is inserted. The first pin hole 243 may vertically overlap with a corresponding hole in the first block 110, and the first bolt hole 245 may vertically overlap with a corresponding hole in the first block 110. The first fixing pin 151 may pass through the first pin hole 243 of the first auxiliary shim 240 and be inserted into and fixed to the corresponding hole in the first block 110. The first bolt 153 may pass through the first bolt hole 245 of the first auxiliary shim 240 and be inserted into and fastened to the corresponding hole in the first block 110. When the first auxiliary shim 240 is mounted on the first bolt 153, the first fixing pin 151 can be used to align and fix the first auxiliary shim 240 to the target position, and then the second bolt can be used to fasten the first auxiliary shim 240 to the first block 110.

[0046] In the exemplary embodiment, first pin hole 243 and first bolt hole 245 of first auxiliary shim 240 may each be a slot hole having a minor axis parallel to a first direction (e.g., the Y direction) and a major axis parallel to a second direction (e.g., the X direction). That is, the length of first pin hole 243 along the second direction (e.g., the X direction) may be greater than the length of first pin hole 243 along the first direction (e.g., the Y direction), and the length of first bolt hole 245 along the second direction (e.g., the X direction) may be greater than the length of first bolt hole 245 along the first direction (e.g., the Y direction). When the first pin hole 243 and the first bolt hole 245 of the first auxiliary shim 240 are configured as slot holes having a major axis parallel to the second direction (e.g., the X direction), the offset distance OD, which is the distance between the end 249 of the first auxiliary shim 240 and the end 119 of the first block 110, can be adjusted by adjusting the relative positions between the first fixing pin 151 and the first pin hole 243 and between the first bolt 153 and the first bolt hole 245. The offset distance OD is a parameter that affects the thickness profile of the edge region of the coating layer applied to the substrate 410. The offset distance OD can be changed by grinding or deformation of the die block 100. According to the present application, by configuring the first pin hole 243 and the first bolt hole 245 of the first auxiliary shim 240 as slot holes, the offset distance OD can be controlled in response to grinding or deformation of the die block 100. Therefore, it is possible to eliminate the trouble of having to remanufacture the coater shim 200 every time the die block 100 is ground or deformed, and the process cost of using the slot die coater 10 can be reduced.

[0047] The second auxiliary shim 250 may have substantially the same configuration as the first auxiliary shim 240. The first auxiliary shim 240 has been described with reference to FIGS. 4 to 7 , and those skilled in the art can understand the configuration of the second auxiliary shim 250 from the description of the first auxiliary shim 240. Briefly, the second auxiliary shim 250 may be fastened to the first block 110 by a second fastening member (i.e., a second fixing pin and a second bolt). The second fixing pin may pass through a second pin hole in the second auxiliary shim 250 and be inserted into and fixed to a corresponding hole in the first block 110, and the second bolt may pass through a second bolt hole in the second auxiliary shim 250 and be inserted into and fastened to a corresponding hole in the first block 110. The second pin hole and the second bolt hole of the second fixing pin may be slot holes each having a minor axis parallel to a first direction (e.g., the Y direction) and a major axis parallel to a second direction (e.g., the X direction). The offset distance, which is the distance between the end of the second auxiliary shim 250 and the end of the first block 110, can be adjusted by adjusting the relative position between the second fixing pin and the second pin hole, and the relative position between the second bolt and the second bolt hole.

[0048] (Third embodiment) Fig. 8 is a plan view showing a portion of a slot die coater according to an exemplary embodiment of the present invention. The slot die coater in Fig. 8 will be described below, focusing on differences from the slot die coater 10 described with reference to Figs. 1 to 3.

[0049] 8 together with FIG. 1, in the coater shim 200A, the first auxiliary shim 240A and the second auxiliary shim 250A may each include a region whose width in a first direction (e.g., Y direction) increases as the region approaches the discharge port 140 of the die block 100. When the first auxiliary shim 240A has a first portion, a second portion, and a third portion arranged along the discharge direction of the coating liquid 420, the width in the first direction (e.g., Y direction) of the third portion of the first auxiliary shim 240A may be greater than the width in the first direction (e.g., Y direction) of the first portion of the first auxiliary shim 240A, and the width in the first direction (e.g., Y direction) of the second portion of the first auxiliary shim 240A may increase as the region approaches the discharge port 140 of the die block 100. Similarly, when the second auxiliary shim 250A has a first portion, a second portion, and a third portion arranged along the discharge direction of the coating liquid 420, the width of the third portion of the second auxiliary shim 250A in the first direction (e.g., the Y direction) is greater than the width of the first portion of the second auxiliary shim 250A in the first direction (e.g., the Y direction), and the width of the second portion of the second auxiliary shim 250A in the first direction (e.g., the Y direction) can increase as it approaches the discharge port 140 of the die block 100.

[0050] (Fourth embodiment) Fig. 9 is a plan view showing a portion of a slot die coater according to an exemplary embodiment of the present invention. The slot die coater in Fig. 9 will be described below, focusing on differences from the slot die coater 10 described with reference to Figs. 1 to 3.

[0051] 9 together with FIG. 1, in the coater shim 200B, the first auxiliary shim 240B and the second auxiliary shim 250B may each include a region whose width in a first direction (e.g., Y direction) decreases as the region approaches the discharge port 140 of the die block 100. When the first auxiliary shim 240B has a first portion, a second portion, and a third portion arranged along the discharge direction of the coating liquid 420, the width in the first direction (e.g., Y direction) of the third portion of the first auxiliary shim 240B may be smaller than the width in the first direction (e.g., Y direction) of the first portion of the first auxiliary shim 240B, and the width in the first direction (e.g., Y direction) of the second portion of the first auxiliary shim 240B may decrease as the region approaches the discharge port 140 of the die block 100. Similarly, when the second auxiliary shim 250B has a first portion, a second portion, and a third portion arranged along the discharge direction of the coating liquid 420, the width of the third portion of the second auxiliary shim 250B in the first direction (e.g., the Y direction) is smaller than the width of the first portion of the second auxiliary shim 250B in the first direction (e.g., the Y direction), and the width of the second portion of the second auxiliary shim 250B in the first direction (e.g., the Y direction) can decrease as it approaches the discharge port 140 of the die block 100.

[0052] The present invention has been described in more detail above with reference to the drawings and embodiments, etc. However, the configurations shown in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not represent all of the technical ideas of the present invention, and therefore, at the time of filing this application, there may be various equivalents and modifications that can replace them. [Explanation of symbols]

[0053] 10 Slot die coater 100 Die Block 110 Block 1 111 Manifold 120 Block 2 130 slots 140 Discharge port 151 First fixing pin 153 First Bolt 200 Kotasim 201 Master Sim 210 Base Plate 220 First guide plate 230 Second guide plate 240 1st auxiliary shim 241 1st inner region 242 First outer area 243 First Pinhole 245 First Bolt Hole 250 Second auxiliary shim 251 Second inner area 252 Second outer area 310 Coating Roll 410 Base material 420 Coating Liquid

Claims

1. a die block including a first block having a manifold for containing a coating liquid and a second block on the first block; a coater shim between the first block and the second block; The said coatashim is a master shim including a first guide plate and a second guide plate spaced apart in a first direction with the manifold interposed therebetween, the first guide plate and the second guide plate not covering the manifold; a first auxiliary shim on one side of the first guide plate, the first auxiliary shim including a first inner region that overlaps a first edge of the manifold; a second auxiliary shim on one side of the second guide plate and including a second inner region that overlaps a second edge of the manifold; A slot die coater comprising:

2. the master shim further includes a base plate having one end connected to the first guide plate and another end connected to the second guide plate, the first auxiliary shim extends from the base plate along one side surface of the first guide plate toward the discharge port of the die block, The slot die coater according to claim 1 , wherein the second auxiliary shim extends from the base plate along one side surface of the second guide plate toward the discharge port of the die block.

3. 3. The slot die coater according to claim 1, wherein the width of the first inner region of the first auxiliary shim in the first direction and the width of the second inner region of the second auxiliary shim in the first direction are each between 4 mm and 300 mm.

4. the first auxiliary shim further includes a first outer region between the manifold and the first guide plate; the second auxiliary shim further includes a second outer region between the manifold and the second guide plate; 3. The slot die coater according to claim 1, wherein the width of the first outer region of the first auxiliary shim in the first direction and the width of the second outer region of the second auxiliary shim in the first direction are each between 5 mm and 50 mm.

5. the first auxiliary shim includes a first hole into which a first fastening member configured to fasten the first auxiliary shim to the first block is inserted; the second auxiliary shim includes a second hole into which a second fastening member configured to fasten the second auxiliary shim to the first block is inserted; The slot die coater according to claim 1 or 2, wherein the first hole and the second hole are each a slot hole whose length in the first direction is smaller than its length in a second direction perpendicular to the first direction.

6. The slot die coater according to claim 5 , wherein an end of the first auxiliary shim and an end of the second auxiliary shim are each spaced apart from an end of the first block in the second direction.

7. a first fixing pin that passes through a first pin hole of the first auxiliary shim and is inserted into a corresponding hole of the first block; a first bolt passing through a first bolt hole of the first auxiliary shim and fastened to a corresponding hole of the first block; a second fixing pin that passes through a second pin hole of the second auxiliary shim and is inserted into a corresponding hole of the first block; a second bolt passing through a second bolt hole of the second auxiliary shim and fastened to a corresponding hole of the first block; further comprising 3. The slot die coater according to claim 1, wherein the first pinhole, the second pinhole, the first bolt hole, and the second bolt hole are each slot holes whose length in the first direction is shorter than their length in a second direction perpendicular to the first direction.

8. The slot die coater according to claim 1 or 2, wherein, in a plan view, the first auxiliary shim and the second auxiliary shim each have a rectangular shape with a uniform width in the first direction.

9. The slot die coater according to claim 1 or 2, wherein at least one of the first auxiliary shim and the second auxiliary shim includes a region whose width decreases toward an outlet of the die block.

10. The slot die coater according to claim 1 or 2, wherein at least one of the first auxiliary shim and the second auxiliary shim includes a region whose width increases toward an outlet of the die block.

11. the first auxiliary shim and the second auxiliary shim do not vertically overlap the master shim, The slot die coater according to claim 1 or 2, wherein a distance in the first direction between the first auxiliary shim and the second auxiliary shim is smaller than a width in the first direction of the manifold.

12. a die block including a first block having a manifold for containing a coating liquid and a second block on the first block; a coater shim between the first block and the second block; The said coatashim is a master shim including a base plate extending in a first direction, a first guide plate extending in a second direction from the base plate toward the discharge port of the die block, and a second guide plate extending in the second direction from the base plate toward the discharge port of the die block, the first guide plate and the second guide plate being spaced apart in the first direction; a first auxiliary shim fastened to the first block by a first fastening member and including a first hole into which the first fastening member is inserted; a second auxiliary shim fastened to the first block by a second fastening member and including a second hole into which the second fastening member is inserted; the first auxiliary shim and the second auxiliary shim are located between the first guide plate and the second guide plate, a length of the first hole of the first auxiliary shim in the second direction is greater than a length of the first hole of the first auxiliary shim in the first direction; A slot die coater, wherein the length of the second hole of the second auxiliary shim in the second direction is greater than the length of the second hole of the second auxiliary shim in the first direction.

13. The slot die coater according to claim 12 , wherein an end of the first auxiliary shim and an end of the second auxiliary shim are each spaced apart from an end of the first block in the second direction.

14. The slot die coater according to claim 12 or 13, wherein the first auxiliary shim and the second auxiliary shim each extend in the second direction from the base plate toward the discharge port of the die block.

15. the first auxiliary shim is connected to one side of the first guide plate, The slot die coater according to claim 14 , wherein the second auxiliary shim is connected to one side of the second guide plate.

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