Shim plate, slot-die coater including same, and method for manufacturing shim plate

Abstract

The shim plate according to an embodiment of the present invention comprises: a plate-shaped first side end portion disposed on one side; a plate-shaped second side end portion disposed on the other side; and at least one shim rib disposed between the first side end portion and the second side end portion, disposed parallel to the first side end portion and the second side end portion, and having at least one stepped portion in the longitudinal direction.

Description

Seam plate, slot die coater including the same, and method for manufacturing a seam plate

[0001] The present invention relates to a shim plate, a slot die coater including the same, and a method for manufacturing a shim plate.

[0002] Unlike primary batteries, which cannot be recharged, secondary batteries refer to batteries capable of charging and discharging, and are applied not only to portable devices but also to electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electric power sources.

[0003] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.6V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, a battery pack is formed by connecting multiple battery cells in parallel depending on the charge / discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge / discharge capacity.

[0004] When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery module consisting of at least one battery cell, preferably multiple battery cells, and then use at least one such battery module to configure the battery pack by adding other components. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output.

[0005] Meanwhile, in the process of manufacturing such secondary batteries, in the slot die coating process in which an electrode active material slurry is applied to an electrode current collector, the coating width process capability of the slot die coater is determined by the tolerance control of the core thickness, so there is a need to control the tolerance of the core thickness.

[0006] However, conventional cores do not have a step in the longitudinal direction. For example, referring to FIG. 5, which is a perspective view of a conventional core, the core has a constant length in the longitudinal direction (a direction parallel to the X-axis). That is, the lengths of the central region and the outer region are configured to be the same. According to such a structure, the side region of the center of the core is machined by MCT (Machine Center Tool) machining, but at this time, the machining tolerance of the end portion of the core increases, and consequently, there is a problem that causes a decrease in the coating width process capability.

[0007] Accordingly, the present invention has the objective of minimizing the thickness tolerance of the shim plate.

[0008] In addition, the present invention has another objective of improving the coating width process capability of a slot die coater including a shim plate.

[0009] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below.

[0010] A shim plate according to an embodiment of the present invention for solving the above-described problem comprises: a first side end portion in the form of a plate provided on one side; a second side end portion in the form of a plate provided on the other side; and at least one shim portion provided between the first side end portion and the second side end portion, arranged parallel to the first side end portion and the second side end portion, and configured to have at least one step difference in the longitudinal direction.

[0011] In one aspect of the present invention, an opening may be provided between the first side end and the core, between the core and the second side end, or between the cores, in which at least one region is cut from the end of the core plate.

[0012] In another aspect of the present invention, the core may be configured to have at least one step in the thickness direction.

[0013] In another aspect of the present invention, the core may include a central portion provided in the center; and stepped portions provided at both ends of the central portion and configured to have a thickness smaller than that of the central portion.

[0014] Preferably, the longitudinal end of the central portion may be configured to protrude in the longitudinal direction relative to the longitudinal end of the stepped portion.

[0015] More preferably, the protrusion length of the longitudinal end of the center relative to the longitudinal end of the step portion may be configured to be in the range of 1 to 5% relative to the total length of the center.

[0016] In one aspect of the present invention, the step provided at the longitudinal end of the core may be configured to be processed through wire processing.

[0017] In another aspect of the present invention, the central side portion constituting the side of the central portion may be configured to be processed through MCT processing.

[0018] In one aspect of the present invention, the wire may be configured with a thickness of 0.2 to 0.25 phi.

[0019] For example, the above wire may include at least one of sulfur and copper.

[0020] In addition, the present invention provides a slot die coater comprising: a first die block; a second die block configured to face the first die block; and at least one shim plate according to the above-described embodiment, the shim plate interposed between the first die block and the second die block to form a slot.

[0021] In addition, a method for manufacturing a shim plate according to one embodiment of the present invention for solving the above-mentioned problem comprises: a step of preparing a shim plate; a wire processing step of processing the shim plate through immersion discharge using a wire; and a machine center tool (MCT) processing step of processing the shim plate in three dimensions using an end mill after the wire processing step.

[0022] In one aspect of the present invention, the method for manufacturing the shim plate may include a first high-power processing step; a second low-power processing step processed at a lower power than the first high-power processing step; and a third low-power processing step processed at a lower power than the first high-power processing step.

[0023] In another aspect of the present invention, the MCT processing portion of the shim plate may be pre-processed in the wire processing step.

[0024] According to the present invention, the thickness tolerance of the shim plate can be minimized.

[0025] In addition, according to the present invention, the coating width process capability of a slot die coater including a shim plate can be improved.

[0026] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by a person skilled in the art from the description of the invention below.

[0027] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0028] FIG. 1 is a drawing for illustrating a slot die coater according to one embodiment of the present invention.

[0029] Figure 2 is a cross-sectional view taken along the AA' line of Figure 1.

[0030] Figure 3 is an exploded perspective view of Figure 1.

[0031] FIG. 4 is a drawing illustrating the process of applying a slurry onto a substrate using a shim plate according to one embodiment of the present invention.

[0032] Figure 5 is a drawing illustrating the core structure of a conventional core plate.

[0033] Figure 6 is a top view of the core of Figure 5.

[0034] Figure 7 is an enlarged view of a portion of Figure 6.

[0035] FIG. 8 is a drawing for explaining the core structure of a core plate according to one embodiment of the present invention.

[0036] Figure 9 is a top view of the core of Figure 8.

[0037] Figure 10 is an enlarged view of a part of Figure 9.

[0038] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components.

[0039] In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it may mean that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately below" another part, it may mean that there is no other part in between.

[0040]

[0041] FIG. 1 is a drawing for explaining a slot die coater (1) according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1. More specifically, FIG. 2 is a cross-sectional view cut along the line AA' of FIG. 1. FIG. 3 is an exploded perspective view of FIG. 1.

[0042] Referring to FIGS. 1 to 3, in a method for manufacturing an electrode using a slot die coater (1), an electrode active material slurry (S) discharged from the slot die coater (1) is applied onto a substrate (20) that is transported by a coating roll (10). Specifically, the coating roll (10) rotates in the MD direction of FIG. 1, and accordingly, the substrate (20) is also transported in the MD direction of FIG. 1 and the slurry (S) is coated on its surface. The electrode active material slurry (S) discharged from the slot die coater (1) is widely applied to one side of the substrate (20) to form an electrode active material layer.

[0043] Referring to FIGS. 1 to 3, the slot die coater (1) comprises a die block (200); and a shim plate (100) interposed between the die blocks (200). Specifically, the die block (200) may include a first die block (210); and a second die block (230) configured to face the first die block (210). The shim plate (100) may be configured to form a slot by being interposed between the first die block (210) and the second die block (230).

[0044] The above slot die coater (1) comprises a first die block (210) and a second die block (230), and a slot (201) is formed between the first die block (210) and the second die block (230). An electrode active material slurry (S) supplied from a feed section (not shown) is received in the manifold (212), and the electrode active material slurry (S) is discharged through a discharge port (40) connected to the slot (201) to form an electrode active material layer. The first die block (210) includes a first die lip (211) which is the leading end of the first die block (210). The second die block (230) includes a second die lip (231) which is the leading end of the second die block (230).

[0045] The coating width of the electrode active material layer coated on the substrate (20) is determined by the width of the slot (201). If a change in the coating width is required, various coating widths can be achieved by changing the shim plate (100) that determines the internal space of the manifold (212) and the width of the slot (201). That is, the coating width can be adjusted by changing the size and shape of the shim plate (100) inserted between the first die block (210) and the second die block (230).

[0046]

[0047] FIG. 4 is a drawing for explaining a shim plate (100) according to one embodiment of the present invention.

[0048] Referring to FIG. 4, the shim plate (100) is mounted inside a slot die coater (1) for discharging an active material. Specifically, the shim plate (100) may be positioned in a mounted form within a die block (200). Specifically, the shim plate (100) may be positioned interposed between a first die block (210) and a second die block (230).

[0049] The height of the above shim plate (100) may correspond to the gap between the first die coater and the second die coater. That is, the height of the above shim plate (100) may correspond to the vertical width (Y direction, slot gap) of the slot (201) of the slot die coater (1).

[0050]

[0051] Referring again to FIGS. 3 and 4, the shim plate (100) may include a base portion (110), a first side portion (120), a second side portion (130), and a shim (140). The shim plate (100) may further include an opening (150).

[0052] The above shim plate (100) comprises a stainless steel material. Preferably, the above shim plate (100) may comprise SUS304 or SUS430 material. However, the material of the above shim plate (100) is not limited thereto.

[0053] The base portion (110) may be configured to have a plate shape extending in one direction. For example, the extension direction of the base portion (110) may be perpendicular to the slurry (S) discharge direction.

[0054] The first side end (120) and the second side end (130) may extend from the base portion (110). Preferably, the first side end (120) and the second side end (130) may extend from the base portion (110) in the discharge direction. The first side end (120) and the second side end (130) may be configured in a roughly plate shape. The first side end (120) may be provided on one side of the shim plate (100). For example, the first side end (120) may be provided on the left side with respect to the discharge direction. The second side end (130) may be provided on the other side of the shim plate (100). That is, the second side end (130) may be provided on the opposite side of the first side end (120). For example, the first side end (120) may be provided on the right side with respect to the discharge direction. That is, the first side end (120) and the second side end (130) may have a roughly plate-shaped structure provided at both ends of the base part (110).

[0055] The above-described core plate (100) may include at least one core (140). For example, the above-described core plate (100) may include a plurality of cores (140). The core (140) may be provided between the first side end (120) and the second side end (130). The core (140) may be arranged parallel to the first side end (120) and the second side end (130). When one core (140) is provided, the gap between the first side end (120) and the core (140) may be configured to be the same as the gap between the second side end (130) and the core (140). Meanwhile, if multiple cores (140) are provided, the spacing between the first side end (120) and the core (140), the spacing between the second side end (130) and the core (140), and the spacing between the cores (140) can be configured to be equal to each other.

[0056] An opening (150) may be provided in the space between the first side end (120) and the core (140), between the second side end (130) and the core (140), or between the core (140). That is, the core plate (100) may have an opening (150) in which one area is cut. The width of the opening (150) of the core plate (100) is designed so that a slurry (S) application area having a predetermined width is formed on the substrate (20) by the opening (150), and uncoated areas are formed on both sides of the slurry (S) application area.

[0057] For example, there are cases where a striped pattern-shaped slurry (S) application area is formed on a substrate (20). In such cases, a shim plate (100) as shown in FIG. 4 is used. Referring to FIG. 4, the shim plate (100) has a number of openings (150) formed by intermittently cutting one area. When using such a shim plate (100), a number of striped pattern-shaped slurry (S) application areas are formed on the substrate (20) as many times as the number of openings (150), and uncoated areas are formed on both sides of the slurry (S) application areas. More specifically, the slurry (S) is discharged in the X direction, and the discharged slurry (S) is applied onto the substrate (20). The substrate (20) moves in the X direction, and accordingly, the slurry (S) can be continuously applied onto the substrate (20).

[0058]

[0059] In one aspect of the present invention, the shim plate (100) may include at least one coating layer. The coating layer may preferably be uniformly coated over the entire area of ​​the shim plate (100). The coating layer may have adhesive properties. According to such a configuration, the coating layer can be stably coated on the shim plate (100). That is, according to such a configuration, the durability of the shim plate (100) can be improved. In another aspect of the present invention, the coating layer may be configured to have elasticity. For example, the coating layer may include the fluorocarbon resin coating material. For example, the coating layer may be a Teflon coating layer. However, the material of the coating layer is not limited to fluorocarbon resin. Any material that can control the thickness of the coating layer to be thin and has adhesive properties is considered to be included within the scope of the coating layer of the present invention.

[0060] The slot die coater (1) of the present invention is a device equipped with a slot and coating a slurry (S) onto a substrate (20) through the slot. The substrate (20) described below is an electrode current collector, and the slurry (S) refers to an electrode active material slurry (S). However, the scope of the rights of the present invention is not necessarily limited thereto. For example, the substrate (20) may be a porous support constituting a separator, and the slurry (S) may be an organic material with a composition or physical properties different from the active material. That is, if thin film coating is required, the substrate (20) and the slurry (S) may be any type.

[0061]

[0062] FIG. 5 is a drawing for explaining the structure of the core (140) of a conventional core plate (100), and FIG. 6 is a top view of the core (140) of FIG. 5. FIG. 7 is an enlarged view of a part of FIG. 6.

[0063] Referring to FIGS. 5 to 7, the conventional core (140) does not have a step in the longitudinal direction. For example, referring to FIG. 5, which is a perspective view of the conventional core (140), the core (140) has a constant length in the longitudinal direction (a direction parallel to the X-axis). That is, the lengths of the central region and the outer region are configured to be the same. According to such a structure, the side region of the central part (141) of the core (140) is processed by MCT (Machine Center Tool) processing. At this time, the processing tolerance of the end portion of the core (140) increases, and consequently, it may cause a decrease in the coating width processing capability.

[0064]

[0065] FIG. 8 is a drawing for explaining the structure of the core (140) of a core plate (100) according to one embodiment of the present invention, and FIG. 9 is a top view of the core (140) of FIG. 8. FIG. 10 is an enlarged view of a part of FIG. 9.

[0066] Referring to FIGS. 8 to 10, the core (140) may be configured to have at least one step in the thickness direction of the core (140). For example, the core (140) may include a central part (141) and a stepped part (143).

[0067] The above-mentioned center (141) may be provided in the center of the above-mentioned core (140). At this time, the height of the thickness of the above-mentioned core (140) may correspond to the gap between the first die coater and the second die coater. That is, the thickness of the above-mentioned core (140) may correspond to the vertical width (Y direction, slot gap) of the slot (201). Accordingly, the slurry (S) is prevented from passing through the center (141).

[0068] The stepped portion (143) may be provided at both ends of the central portion (141). The stepped portion (143) may be configured to have a thickness smaller than that of the central portion (141). In this case, the thickness refers to the height of the core (140). That is, the height of the stepped portion (143) may be configured to be smaller than the height of the central portion (141). For example, the thickness of the stepped portion (143) may be configured to be approximately 50 to 70% of the thickness of the core (140). Meanwhile, the width-direction length (D2) of the stepped portion (143) may be configured to be approximately 10 to 20% of the total width of the core (140). In this case, the side area of ​​the central portion (141) that protrudes in the height direction relative to the stepped portion (143) is defined as the central side portion (141a).

[0069] According to this configuration, the amount of slurry (S) discharged from the area where the step portion (143) is located is less than the amount of slurry (S) discharged through the central area of ​​the opening portion (150). Accordingly, when applying an active material to the substrate (20), a sliding portion between the retaining portion and the unretaining portion can be easily formed.

[0070]

[0071] Referring again to FIGS. 8 to 10, the core (140) may be configured to have at least one step in the longitudinal direction (a direction parallel to the X-axis).

[0072] For example, the longitudinal end of the central part (141) may be configured to protrude longitudinally relative to the longitudinal end of the stepped part (143). In this case, among the protruding areas of the central part (141), the side area is defined as the stepped side part (141b).

[0073] Preferably, the protruding length of the longitudinal end of the central part (141) relative to the longitudinal end of the stepped part (143) may be configured to be in the range of about 1 to 5% relative to the total length of the central part (141). More preferably, the protruding length of the longitudinal end of the central part (141) relative to the longitudinal end of the stepped part (143) may be configured to be in the range of about 2 to 4% relative to the total length of the central part (141).

[0074] At this time, the step provided at the longitudinal end of the core (140) can be configured to be processed through wire processing. Specifically, the stepped side portion (141b) provided at the longitudinal end of the core (140) can be configured to be processed through wire processing. Meanwhile, the central side portion (141a) constituting the side of the central part (141) can be configured to be processed through MCT processing.

[0075] Wire processing is also known as wire cut electrical discharge processing and refers to a immersion discharge method using a wire. Here, the wire may be composed of a thickness of approximately 0.2 to 0.25 phi. Meanwhile, the wire may include at least one of sulfur and copper. That is, the wire may be composed of a conductor containing sulfur and / or copper. The processing quality and processing time are determined according to the thickness of the wire, the cutting speed, and the applied current output value. In the case of the core (140), the tolerance level can be satisfied by performing a total of three wire processing steps: first with high output, second with low output, and third with high output.

[0076] MCT machining is a process capable of three-dimensional (X, Y, Z axes) processing that performs precision machining by applying rotational force to a fixed material using an end mill (drill) tool. Since end mill tools are consumable, managing usage is crucial for controlling manufacturing tolerances. End mills can be used sequentially in parallel, primarily for roughing (approximately 90% machining) and cutting (approximately 10% machining). In this process, consistent fixing methods are essential, as variations in machining quality differ depending on the material's fixing position.

[0077] Meanwhile, generally, in the processing sequence of the shim plate (100), MCT processing is performed after wire processing. At this time, since the wire processing tolerance management level is higher than the MCT processing tolerance management level, if the MCT processing area is pre-processed during wire processing, it is less affected by the tolerance generated during MCT processing. Therefore, according to the configuration of the present invention as described above, the processing tolerance level of the shim plate (100) can be satisfied. That is, according to the above configuration, the coating width processing capability of the slot die coater (1) including the shim plate (100) can be improved. In addition, according to the above configuration, precision processing of the shim plate (100) becomes possible. For example, according to the above configuration, the tolerance level can be managed within the range of approximately ± 0.025mm to 0.010mm. In addition, according to the above configuration, there is no difference in sliding and fat edge levels compared to the conventional shim plate (100), and the same effect can be obtained.

[0078]

[0079] Referring again to FIGS. 1 to 3, the die block (200) includes a first die block (210) and a second die block (230). A shim plate (100) for forming a slot (201) may be interposed between the first die block (210) and the second die block (230).

[0080] A slot (201) is formed between the first die block (210) and the second die block (230) where they face each other. A shim plate (100) is interposed therein to create a gap between them, thereby forming a slot (201) that serves as a passage through which the slurry (S) can flow. The thickness of the shim plate (100) determines the vertical width (Y direction, slot gap) of the slot (201).

[0081] As shown in FIG. 4, the shim plate (100) may have a plurality of openings (150) formed by intermittently cutting a portion of one area. Accordingly, an outlet through which the slurry (S) can be discharged to the outside is formed between the first die lip (211) and the second die lip (231), which are the respective leading ends of the first die block (210) and the second die block (230). The outlet can be said to be formed by the first die lip (211) and the second die lip (231) being spaced apart.

[0082] Referring again to FIGS. 2 and FIGS. 3, either the first die block (210) or the second die block (230) may be provided with a manifold (212) having a predetermined depth and communicating with a slot (201). Although not shown in the drawings, this manifold (212) is connected to a slurry (S) supply chamber (not shown) installed externally via a supply pipe to receive slurry (S). When the manifold (212) is filled with slurry (S), the slurry (S) is guided to flow along the slot (201) and discharged to the outside through a discharge port.

[0083] According to the die block (200) having such a configuration, a coating roll (10) that is rotatably arranged is positioned in front of the die block (200), and while driving the substrate (20) to be coated by rotating the coating roll (10), a slurry (S) can be discharged and continuously applied to the surface of the substrate (20) by contacting it. Alternatively, a pattern coating can be formed intermittently on the substrate (20) by alternately supplying and stopping the slurry (S).

[0084]

[0085] Meanwhile, the method for manufacturing the shim plate (100) of the present invention includes the following steps.

[0086] (Step 1) Step 1 of preparing the shim plate (100)

[0087] The above step is to prepare a roughly plate-shaped core plate (100) comprising the aforementioned base portion (110), first side portion (120), second side portion (130), and at least one core (140).

[0088] (Step 2) A second step of processing the shim plate (100) through a immersion discharge using a wire.

[0089] In the above step, the shim plate (100) can be processed using a wire immersion discharge method. Here, the wire may be composed of a thickness of about 0.2 to 0.25 phi. Meanwhile, the wire may include at least one of sulfur and copper. That is, the wire may be composed of a conductor containing sulfur and / or copper. The processing quality and processing time may be determined according to the thickness of the wire, the cutting speed, and the applied current output value. In the case of the shim (140), the tolerance level can be satisfied by performing a total of three wire processing steps: first with high output, second with low output, and third with high output.

[0090] For example, the wire processing step may include a high-power processing step; a second low-power processing step processed at a lower power than the first high-power processing step; and a third low-power processing step processed at a lower power than the first high-power processing step. In this case, the output of the second low-power processing step and the output of the third low-power processing step may be the same or different. By processing in such a manner, the tolerance level can be satisfied.

[0091] Referring to FIG. 8, in the above step, processing of the area indicated by the thick dotted line may be performed. That is, the process of cutting the longitudinal end area and the width side area of ​​the core (140) may be performed. In particular, in the second step, the stepped side portion (141b) of the core (140) may be wire processed.

[0092] In the above step, a step can be formed at the longitudinal end of the core (140) through wire processing. More specifically, in the above step, a step of D1 as indicated in FIGS. 8 to 10 can be formed at the end region of the core (140) through wire processing. By forming a step of D1 in advance in this step, the MCT processing tolerance of the central side portion (141a) to be performed later can be minimized.

[0093] (Step 3) After the wire processing step above, a third step of MCT (Machine Center Tool) processing to process the shim plate (100) in three dimensions using an end mill.

[0094] The above step involves machining the shim plate (100) in three dimensions (X, Y, Z axes) through MCT machining. In this step, precision machining is performed by applying rotational force to the fixed shim plate (100) using an end mill (drill) tool. Since end mill tools are consumable, managing usage is important for managing manufacturing tolerances. End mills can be used sequentially in parallel in two types: mainly for roughing (approx. 90% machining) and for cutting (approx. 10% machining). At this time, since the machining quality varies depending on the fixed position of the material, a consistent fixing method is important.

[0095] Meanwhile, after the process of cutting the longitudinal end region and the widthward side region of the core (140), which is the area indicated by the thick dotted line, through wire processing in the second step is performed, the central side portion (141a) can be processed in the third step. That is, the MCT processing portion of the core plate (100) can be pre-processed in the wire processing step. Specifically, the step difference of the end region of the core (140) can be pre-processed in the wire processing step. More specifically, the stepped side portion (141b) of the core (140) can be pre-processed in the wire processing step. By pre-forming a step difference of D1 in this step, the MCT processing tolerance of the central side portion (141a) can be minimized in the third step.

[0096] According to the method for manufacturing a shim plate (100) of the present invention, which includes the steps described above, the level of thickness tolerance control can be improved. Accordingly, according to the above configuration, the coating width process capability of the slot die coater (1) can be improved.

[0097]

[0098] Meanwhile, although terms indicating direction such as up and down have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to a person skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0099] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

Claims

1. A plate-shaped first side end provided on one side; A second side end portion in the form of a plate provided on the other side; and At least one core provided between the first side end and the second side end, arranged parallel to the first side end and the second side end, and configured to have at least one step in the longitudinal direction. A shim plate characterized by including 2. In Paragraph 1, A shim plate characterized by having an opening formed by cutting at least one region from the end of the shim plate between the first side end and the shim, between the shim and the second side end, or between the shim and the shim.

3. In Paragraph 1, The above heart meat is, A shim plate characterized by being configured to have at least one step in the thickness direction.

4. In Paragraph 1, The above heart meat is, A central part provided in the center; and Step portions provided at both ends of the central part and configured to have a thickness smaller than that of the central part. A shim plate characterized by including 5. In Paragraph 4, A shim plate characterized in that the longitudinal end of the central portion is configured to protrude in the longitudinal direction relative to the longitudinal end of the stepped portion.

6. In Paragraph 5, A shim plate characterized in that the protrusion length of the longitudinal end of the central portion relative to the longitudinal end of the stepped portion is configured in the range of 1 to 5% relative to the total length of the central portion.

7. In Paragraph 5, A shim plate characterized in that the step provided at the longitudinal end of the above-mentioned shim is configured to be processed through wire processing.

8. In Paragraph 4, A shim plate characterized in that the central side portion constituting the side of the central portion is configured to be processed through MCT processing.

9. In Paragraph 7, A shim plate characterized by the above wire having a thickness of 0.2 to 0.25 phi.

10. In Paragraph 7, A shim plate characterized by comprising at least one of the above wires, sulfur and copper.

11. First die block; A second die block configured to face the first die block; and A shim plate described in any one of claims 1 to 10, wherein the shim plate is interposed between the first die block and the second die block to form a slot. A slot die coater including 12. As a method for manufacturing a shim plate, Step of preparing the shim plate; A wire processing step for processing a shim plate through sedimentation discharge using a wire; and After the above wire processing step, an MCT (Machine Center Tool) processing step is performed to machine the shim plate in three dimensions using an end mill. A method for manufacturing a shim plate including 13. In Paragraph 12, 1st high-power processing stage; A second low-power processing step processed at a lower output than the first high-power processing step; and A third low-power processing step processed at a lower output than the above first high-power processing step A method for manufacturing a shim plate characterized by including 14. In Paragraph 12, A method for manufacturing a shim plate characterized in that the MCT processing portion of the shim plate is pre-processed in the wire processing step.

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