Die coater

Abstract

According to exemplary embodiments, a die coater is provided. The die coater comprises: a first die including a manifold; a body shim coupled to the first die; and a spacer shim coupled to the first die, wherein the spacer shim comprises a cover portion that covers the manifold and extends in a first direction which is the direction in which an electrode slurry is discharged from the first die, and a first protrusion connected to the cover portion and protruding in a second direction perpendicular to the first direction, and the body shim comprises a body extending in the second direction, a wing connected to the body at the second-direction end thereof, and a second protrusion protruding in the second direction from the wing.

Description

Die coater

[0001] The present invention relates to a die coater.

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0051305, filed April 17, 2024, and all contents of the document in that Republic of Korea Patent Application are incorporated herein by reference.

[0003] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. Recently, improved energy density and economies of scale have dramatically reduced the per-unit manufacturing cost of secondary batteries. Furthermore, as the range of battery electric vehicles (BEVs) has increased to match that of fuel-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0004] The electrodes of secondary batteries are the most important components in terms of energy density. Secondary battery electrodes can be formed through coating, roll pressing, drying, slitting, and notching processes. Among these, the coating process, which involves applying a coating material containing an active material onto a polarizing plate, can be performed using a die coater.

[0005] The technical problem to be achieved by the present invention is to provide a die coater with improved coating performance.

[0006] According to exemplary embodiments of the present invention for solving the above-described problem, a die coater is provided. The die coater comprises: a first die including a manifold; a body shim coupled to the first die; and a spacer shim coupled to the first die, wherein the spacer shim includes a cover portion extending in a first direction in which electrode slurry is discharged from the first die and covering the manifold, and a first protrusion connected to the cover portion and protruding in a second direction perpendicular to the first direction, and the body shim includes a body extending in the second direction, a wing connected to an end of the body in the second direction, and a second protrusion protruding from the wing in the second direction.

[0007] The above second protrusion protrudes toward the cover portion.

[0008] The above first protrusion protrudes toward the wing.

[0009] The first protrusion and the second protrusion are staggered.

[0010] The wing includes a first portion connected to the body and extending in the first direction and a second portion connected to the first portion and extending in the second direction, and the second protrusion protrudes from the second portion in the second direction.

[0011] The first protrusion overlaps the second portion of the wing in the second direction, and the second protrusion overlaps the cover portion in the second direction.

[0012] The first protrusion and the second protrusion overlap in the first direction.

[0013] The above spacer core has a Γ shape.

[0014] The above first protrusion is connected to the end of the cover part in the first direction.

[0015] The above first protrusion is spaced apart from the end of the cover portion in the first direction.

[0016] The spacer core further includes fixing pins for fixing the spacer core to the first die, the spacer core includes slots corresponding to the fixing pins, and a length of the slots in the first direction is longer than a length of the slots in the second direction.

[0017] The spacer core further includes fixing pins for fixing the spacer core to the first die, the spacer core includes slots corresponding to the fixing pins, and a length of the slots in the first direction is shorter than a length of the slots in the second direction.

[0018] According to exemplary embodiments, a die coater is provided. The die corner includes a first die including a manifold; a body shim coupled to the first die; and a spacer shim coupled to the first die, wherein the spacer shim has a Γ shape.

[0019] According to exemplary embodiments of the present invention, leakage of electrode slurry due to misalignment between the spacer core and the body core can be prevented, and thus, the reliability and yield of the coating process can be improved.

[0020] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0021] Figure 1 illustrates a secondary battery manufacturing facility according to exemplary embodiments.

[0022] Figure 2 is an exploded perspective view illustrating a die coater according to exemplary embodiments.

[0023] Figure 3 is a plan view showing the first die and core.

[0024] Figure 4 illustrates the layout of body cores and spacer cores according to exemplary embodiments.

[0025] Figure 5 illustrates the layout of body cores and spacer cores according to exemplary embodiments.

[0026] Figure 6 illustrates the layout of body cores and spacer cores according to exemplary embodiments.

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0028] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0029] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0030] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0031]

[0032] (Example 1)

[0033] Figure 1 illustrates a secondary battery manufacturing facility (10) according to exemplary embodiments.

[0034] According to exemplary embodiments, a secondary battery manufacturing facility (10) may include a die coater (100) and rolls (200). The die coater (100) may be configured to discharge a coating material. A portion of the die coater (100) from which the coating material is discharged may be referred to as a lip (100L). According to exemplary embodiments, the die coater (100) may be configured to apply a coating material onto a current collector (SB). The coating material may include an electrode slurry.

[0035] An electrode slurry can be used in the manufacture of an electrode of a secondary battery. The electrode slurry can include an electrode active material, a conductive material, a binder, and a solvent. The electrode slurry can be manufactured by dissolving the electrode active material, the conductive material, the binder, etc. in a solvent. The solvent can disperse the electrode active material, etc. The solvent can be an aqueous solvent or a non-aqueous solvent. The solvent can include any one of dimethyl sulfoxide (DMSO), isopropyl alcohol, N-methylpyrrolidone (NMP), acetone, water, and mixtures thereof. The amount of the solvent used can be determined based on the target viscosity of the electrode slurry. Parameters determining the amount of the solvent used include the coating thickness of the electrode slurry, the manufacturing yield, and the workability.

[0036] A cathode active material is a material capable of causing an electrochemical reaction. The cathode active material may be a lithium transition metal oxide. Examples of the cathode active material include layered compounds such as lithium cobalt oxide (LiCoO2) and lithium nickel oxide (LiNiO2) substituted with one or more transition metals; lithium manganese oxide substituted with one or more transition metals; chemical formula LiNi 1-y M y Lithium nickel oxide expressed as O2 (wherein, M is any one of Co, Mn, Al, Cu, Fe, Mg, B, Cr, Zn, and Ga, and 0.01≤y≤0.7); Li 1+z Ni 1 / 3 Co 1 / 3 Mn 1 / 3 O2, Li 1+zN i 0.4 Mn 0.4 Co 0.2 Li like O2 1+z Ni b Mn c Co 1-(b+c+d) M d O (2-e) A e (wherein, -0.5≤z≤0.5, 0.1≤b≤0.8, 0.1≤c≤0.8, 0≤d≤0.2, 0≤e≤0.2, b+c+d<1, M is any one of Al, Mg, Cr, Ti, Si, and Y, and A is any one of F, P, and Cl) lithium nickel cobalt manganese composite oxide; and chemical formula Li 1+x M 1-y M' y PO 4-z X z (wherein, M is a transition metal, more specifically, one of Fe, Mn, Co, and Ni, M' is one of Al, Mg, and Ti, X is one of F, S, and N, -0.5≤x≤+0.5, 0≤y≤0.5, and 0≤z≤0.1) and may include one of the olivine-based lithium metal phosphates.

[0037] The negative active material may include carbon, such as non-graphitizable carbon, graphitic carbon, etc. The negative active material may include, for example, Li x Fe2O3(0≤x≤1), LixWO2(0≤x≤1), Sn x Me 1-x Me' y O z (wherein Me is any one of Mn, Fe, Pb and Ge, and Me' is any one of Al, B, P, Si, elements of group 1, 2 and 3 of the periodic table and halogens; 0 <x≤1 이고; 1≤y≤3 이며; 1≤z≤8) 등의 금속 복합 산화물을 포함할 수 있다. 음극 활물질은, 예컨대, 리튬 금속; 리튬 합금; 규소계 합금; 및 주석계 합금 중 어느 하나를 포함할 수 있다. 음극 활물질은, 예컨대, SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4및 Bi2O5등의 금속 산화물을 포함할 수 있다. 음극 활물질은, 예컨대, 폴리아세틸렌 등의 도전성 고분자; Li-Co-Ni 계 재료 등을 포함할 수도 있다.

[0038] The conductive material can have conductivity without causing a chemical change in the secondary battery ultimately manufactured. The conductive material may include, for example, graphite such as natural graphite or artificial graphite; carbon black such as acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fiber or metal fiber; metal powders such as fluorocarbon, aluminum, and nickel powder; conductive whiskey such as zinc oxide or potassium titanate; conductive metal oxides such as titanium oxide; and polyphenylene derivatives.

[0039] The binder can enhance the bonding between the active material and the conductive material and the bonding strength to the electrode plate. The binder can include, for example, polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinyl pyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluoroelastomer, various copolymers, etc.

[0040] The thickness of the positive electrode current collector may be in the range of about 3 μm to about 500 μm. The positive electrode current collector may not cause chemical changes in the secondary battery to be ultimately manufactured and may have high conductivity. The positive electrode current collector may include, for example, any one of stainless steel, aluminum, nickel, titanium, calcined carbon, and aluminum. The positive electrode current collector may also include stainless steel surface-treated with carbon, nickel, titanium, silver, or the like. The surface of the positive electrode current collector may include a micro-roughened structure to increase the adhesion of the active material. The shape of the positive electrode current collector may include any one of a film, a sheet, a foil, a net, a porous material, a foam, and a non-woven fabric.

[0041] The thickness of the negative electrode current collector may be in the range of about 3 μm to about 500 μm. The negative electrode current collector may not cause chemical changes in the secondary battery to be ultimately manufactured and may have high conductivity. The negative electrode current collector may include any one of copper, stainless steel, aluminum, nickel, titanium, sintered carbon, and an aluminum-cadmium alloy. The negative electrode current collector may also include stainless steel surface-treated with carbon, nickel, titanium, silver, etc. The surface of the negative electrode current collector may include a micro-roughened structure to increase the adhesion of the active material. The shape of the negative electrode current collector may include any one of a film, a sheet, a foil, a net, a porous material, a foam, and a non-woven fabric.

[0042]

[0043] (Example 2)

[0044] Fig. 2 is an exploded perspective view illustrating a die coater (100) according to exemplary embodiments. In Fig. 2, the second die (120, see Fig. 1) is omitted.

[0045] Figure 3 is a plan view showing the first die (110) and core (130).

[0046] FIG. 4 shows the layout of a body core (131) and a spacer core (133) according to exemplary embodiments.

[0047] Referring to FIGS. 1 to 4, the die coater (100) may include a first die (110), a second die (120), a shim (130), shim holders (141), shim holder pins (143), shim holder pins (145), and shim holders (147).

[0048] The first die (110) may include a manifold (111) and an electrode slurry supply path connected to the manifold (111). The electrode slurry may flow into the manifold (111) through the electrode slurry supply path. The manifold (111) may be a hollow space configured to receive the electrode slurry. After the electrode slurry fills the manifold (111), the electrode slurry may be discharged to the outside of the die coater (100). The electrode slurry may be discharged to the outside through slits defined by the shim (130) and the land portion (113) from the manifold (111).

[0049] The manifold (111) may have a well shape having a predetermined depth from the land portion (113). The manifold (111) may include an inclined surface, and thus, the electrode slurry may be stably discharged from the die coater (100).

[0050] The core (130) may be interposed between the first die (110) and the second die (120). The first die (110) may be in contact with the lower surface of the core (130). The second die (120) may be in contact with the upper surface of the core (130). The core (130) may include a body core (131) and spacer cores (133, 135, 137).

[0051] The body core (131) can be substantially parallel to each of the X and Y directions, and can be substantially perpendicular to the Z direction. The body core (131) can include a body (131B) and wings (131W).

[0052] The body (131B) may extend in the Y direction. The body (131B) may be a plate having a width in the X direction that is smaller than the length in the Y direction. Here, the X direction is a direction in which the electrode slurry is discharged, and the Y direction may be substantially perpendicular to the X direction.

[0053] The body (131B) may include a plurality of grooves (131G). Each of the plurality of grooves (131G) may be located on a side of the body (131B) parallel to the Y direction, adjacent to the manifold (111) (e.g., overlapping the manifold (111)). Each of the plurality of grooves (131G) may be recessed inward from the sides of the body (131B) parallel to the Y direction.

[0054] The plurality of grooves (131G) may correspond to the plurality of spacer shims (133, 135, 137). The plurality of grooves (131G) may expose a portion of the first die (110). The plurality of spacer shims (133, 135, 137) may be partially inserted into a corresponding one of the plurality of grooves (131G). The plurality of spacer shims (133, 135, 137) may be fixed to the portion of the first die (110) exposed by the plurality of grooves (131G) by fixing members (147). The fixing members (147) may be, for example, bolts.

[0055] According to exemplary embodiments, the Y-direction width of each of the plurality of grooves (131G) may be different from the Y-direction width of a corresponding one of the spacer shims (133, 135, 137). According to exemplary embodiments, the Y-direction width of each of the plurality of grooves (131G) may be larger than the Y-direction width of a corresponding one of the spacer shims (133, 135, 137). Accordingly, the plurality of grooves (131G) guide the coupling of the spacer shims (133, 135, 137) while providing the spacer shims (133, 135, 137) with a degree of freedom in the Y-direction, so that the positions of the spacer shims (133, 135, 137) can be precisely adjusted in the Y-direction.

[0056] The wings (131W) may be connected to the Y-direction end of the body (131B). Each of the wings (131W) may include a first portion (131W1) extending in the X-direction and a second portion (131W2) extending in the Y-direction. The first portion (131W1) may be connected to the body (131B). The second portion (131W2) may be connected to the first portion (131W1). The body seam (131) may further include protrusions (131P) protruding in the Y-direction from the second portion (131W2) of the wings (131W). Accordingly, each of the wings (131W) may include a step structure facing the spacer seams (133). The distance between the protrusion (131P) and the lip (110B) may be different from the distance between the protrusion (131P) and the manifold (111). The distance between the protrusion (131P) and the lip (110B) may be greater than the distance between the protrusion (131P) and the manifold (111).

[0057] The spacer cores (133, 135, 137) can be interposed between the wings (131W) in the Y direction. Each of the spacer cores (133, 135, 137) can overlap each of the wings (131W) in the Y direction.

[0058] According to exemplary embodiments, the spacer seams (133) may be adjacent to the Y-direction edges of the seam (130). According to exemplary embodiments, the spacer seams (133) may be adjacent to the wings (131W). According to exemplary embodiments, the spacer seams (133) may be in contact with the wings (131W), but are not limited thereto. Each of the spacer seams (133) may be referred to as an edge spacer seam or a first spacer seam.

[0059] According to exemplary embodiments, the spacer core (135) may be positioned at the center of the core (130) in the Y direction. According to exemplary embodiments, the spacer core (135) may be interposed between the spacer cores (133). The spacer core (135) may be referred to as a center spacer core or a second spacer core.

[0060] According to exemplary embodiments, spacer cores (137) may be interposed between spacer cores (133) and spacer cores (135). Each of the spacer cores (137) may be referred to as an intermediate spacer core or a third spacer core.

[0061] The spacer cores (133, 135, 137) may further include insulating channels to provide a flow path for the insulating slurry. In this case, the spacer core (133) may include one insulating channel, and each of the spacer cores (135, 137) may include two insulating channels.

[0062] The spacer shims (133, 135, 137) can partially cover the manifold (111). The spacer shims (133, 135, 137) can overlap the manifold (111) in the Z direction. In FIG. 3, the spacer shims (133, 135, 137) can divide the manifold (111) into four regions, and accordingly, the die coater (100) can be configured to form four maintenance lanes simultaneously through one coating process.

[0063] One skilled in the art will readily arrive at die coaters configured to form various numbers of retention lanes, such as, for example, 1, 2, 8, 16, and 32, based on the description herein. For example, a die coater configured to form 8 retention lanes may include a shim comprising 2 edge spacer shims, 1 center spacer shim, and 6 middle spacer shims.

[0064] Referring to FIGS. 2 to 5, the core fixing members (141) and the core fixing pins (143) can be partially inserted into the land portion (113) of the first die (110). The core fixing members (141) and the core fixing pins (143) can be configured to fix the spacer cores (133) to the land portion (113) of the first die (110).

[0065] The core fixing pins (141) may be, for example, bolts, but are not limited thereto. The core fixing pins (143) may be, for example, bidirectional pins. Accordingly, the core fixing pins (143) may be configured to fix the second die (120) to the core (130) in addition to the first die (110).

[0066] The core fixing pins (145) may be bidirectional pins. Accordingly, the core fixing pins (145) may be configured to fix the second die (120) to the core (130) in addition to the first die (110). Each of the spacer cores (133, 135, 137) may include a fastening hole corresponding to the core fixators (141), the core fixing pins (143), and the core fixators (147) (i.e., the core fixators (141), the core fixing pins (143), and the core fixators (147) are inserted into, and are penetrated by the core fixators (141), the core fixing pins (143), and the core fixators (147)).

[0067] Each of the spacer shims (133, 135, 137) may include slots (SL) corresponding to the shim fixing pins (145) (i.e., the shim fixing pins (145) are inserted into and penetrated by the shim fixing pins (145)). In this example, the length of each of the slots (SL) in the Y direction may be greater than the length of each of the slots (SL) in the X direction, thereby providing a degree of freedom in the Y direction for the spacer shims (133, 135, 137) when aligning the spacer shims (133, 135, 137).

[0068] The cover portion (133C) can overlap with the manifold (111) in the Z direction. The cover portion (133C) can cover the manifold (111). The cover portion (133C) can divide the manifold (111) into two or more parts.

[0069] Each of the spacer cores (133) may have an approximately Γ shape or a bent shape. Each of the spacer cores (133) may include a cover portion (133C) and a protrusion portion (133P). The cover portion (133C) may extend in the Y direction from the body (131B), and the protrusion portion (133P) may be connected to an end of the cover portion (133C) in the Y direction and extend in the X direction.

[0070] The protrusion (133P) may protrude from an edge (e.g., an edge parallel to the X direction) of the cover portion (133C). The protrusion (133P) may protrude toward the wing (131W). The protrusion (133P) may be connected to an end of the cover portion (133C) in the Y direction. Accordingly, each of the spacer cores (133) may include a step structure facing the second portion (131W2) of the wings (131W).

[0071] The distance between the protrusion (133P) and the lip (110B) may be different from the distance between the protrusion (133P) and the manifold (111). The distance between the protrusion (133P) and the lip (110B) may be smaller than the distance between the protrusion (133P) and the manifold (111).

[0072] The protrusion (131P) may be staggered with the protrusion (133P). The protrusion (131P) may not overlap with the protrusion (133P) in the Y direction. The protrusion (131P) may overlap with the cover portion (133C) in the Y direction, and the protrusion (133P) may overlap with the second part (131W2) of the wing (131W) in the Y direction. The protrusion (131P) may overlap with the protrusion (133P) in the X direction.

[0073] When assembling the die coater (100), the spacer shims (133) are aligned based on the X-direction end of the land portion (113). More specifically, when assembling the die coater (100), the spacer shims (133) are aligned so that the X-direction end of the spacer shims (133) matches the X-direction end of the land portion (113), and this alignment condition may be referred to as a zero offset condition.

[0074] If there is a manufacturing error between the body core and the spacer core, the electrode slurry leaks through the space between the body core and the spacer core, which reduces the yield and reliability of the coating process.

[0075] Under zero offset conditions, by adjusting the positions of the spacer cores (133) so that the protrusion (131P) contacts the cover portion (133C) and / or the protrusion (133P) contacts the second portion (131W2) of the wing (131W), the protrusion (131P) and the protrusion (133P) overlapping each other in the X direction can block leakage of the electrode slurry, and thus the yield and reliability of the coating process can be improved.

[0076]

[0077] (Example 3)

[0078] FIG. 5 illustrates the layout of a body core (131) and a spacer core (133') according to other exemplary embodiments.

[0079] Referring to FIG. 5, the body core (131) is substantially the same as that described with reference to FIGS. 2 to 4. In addition, the spacer core (133') is the same as the spacer core (133) of FIG. 4, except that it includes slots (SL') instead of the slots (SL) of FIG. 4. The spacer core (133') can replace the spacer core (133) of FIGS. 2 to 4.

[0080] In this example, the cover portion (133C') of the spacer core (133') may be provided with slots (SL'), and the length of each of the slots (SL') in the X direction may be greater than the length of each of the slots (SL') in the Y direction, so that when aligning the spacer cores (133', 135, 137), a degree of freedom in the X direction may be provided for the spacer cores (133', 135, 137).

[0081] According to exemplary embodiments, even if there is a manufacturing error between the body core and the spacer core, by adjusting the positions of the body core (131) and / or the spacer core (133') so that the protrusions (131P) and the protrusions (133P) are in contact with each other in the X direction, the protrusions (131P) and the protrusions (133P) can block leakage of the electrode slurry, thereby improving the yield and reliability of the coating process.

[0082]

[0083] (Example 4)

[0084] Figure 6 illustrates the layout of body cores and spacer cores according to exemplary embodiments.

[0085] FIG. 6 illustrates the layout of a body core (131') and a spacer core (133") according to other exemplary embodiments.

[0086] Referring to FIG. 6, the body shim (131') is substantially the same as the body shim (131) described with reference to FIGS. 2 to 4, except for the position of the protrusion (131P'). In addition, the spacer shim (133") is the same as the spacer shim (133) of FIG. 4, except for the position of the protrusion (133P'). The body shim (131') and the spacer shim (133") can replace the body shim (131) and the spacer shim (133) of FIGS. 2 to 4.

[0087] The protrusion (131P') may be interlaced with the protrusion (133P'). The protrusion (131P') may not overlap with the protrusion (133P') in the Y direction. The protrusion (131P') may overlap with the cover portion (133C) in the Y direction, and the protrusion (133P') may overlap with the second portion (131W2) in the Y direction. The protrusion (131P') may overlap with the protrusion (133P') in the X direction.

[0088] The protrusion (131P') and the protrusion (133P') may have a reversed positional relationship with the protrusion (131P of FIG. 4) and the protrusion (133P of FIG. 4). The distance between the protrusion (131P') and the lip (110B) may be different from the distance between the protrusion (131P') and the manifold (111). The distance between the protrusion (131P') and the lip (110B) may be smaller than the distance between the protrusion (131P') and the manifold (111). The protrusion (133P') may be spaced apart from the center of the cover (133C) in the X direction. The distance between the protrusion (133P') and the lip (110B) may be different from the distance between the protrusion (133P') and the manifold (111). The distance between the protrusion (133P') and the lip (110B) may be greater than the distance between the protrusion (133P') and the manifold (111).

[0089] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A first die including a manifold; a body core coupled to the first die; and Including a spacer core coupled to the above first die, The spacer core includes a cover portion that extends in a first direction in which the electrode slurry is discharged from the first die and covers the manifold, and a first protrusion that is connected to the cover portion and protrudes in a second direction perpendicular to the first direction, and A die coater characterized in that the body core includes a body extending in the second direction, a wing connected to an end of the body in the second direction, and a second protrusion protruding from the wing in the second direction.

2. In paragraph 1, A die coater characterized in that the second protrusion protrudes toward the cover portion.

3. In paragraph 1, A die coater, characterized in that the first protrusion protrudes toward the wing.

4. In paragraph 1, A die coater characterized in that the first protrusion and the second protrusion are staggered.

5. In paragraph 1, The wing includes a first portion connected to the body and extending in the first direction and a second portion connected to the first portion and extending in the second direction, and A die coater characterized in that the second protrusion protrudes in the second direction from the second part.

6. In paragraph 5, The first protrusion overlaps the second portion of the wing in the second direction, and A die coater characterized in that the second protrusion overlaps the cover portion in the second direction.

7. In paragraph 1, A die coater characterized in that the first protrusion and the second protrusion overlap in the first direction.

8. In paragraph 1, A die coater characterized in that the above spacer core has a Γ shape.

9. In paragraph 1, A die coater characterized in that the first protrusion is connected to the end of the cover part in the first direction.

10. In paragraph 1, A die coater characterized in that the first protrusion is spaced apart from the end of the cover part in the first direction.

11. In paragraph 1, Further comprising fixing pins for fixing the spacer core to the first die, The above spacer core includes slots corresponding to the above fixed pins, and A die coater, characterized in that the length of the slots in the first direction is longer than the length of the slots in the second direction.

12. In paragraph 1, Further comprising fixing pins for fixing the spacer core to the first die, The above spacer core includes slots corresponding to the above fixed pins, and A die coater, characterized in that the length of the slots in the first direction is shorter than the length of the slots in the second direction.

13. A first die including a manifold; a body core coupled to the first die; and Including a spacer core coupled to the above first die, A die coater characterized in that the above spacer core has a Γ shape.

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