Slot die coater

Abstract

The technical idea of the present invention provides a slot die coater comprising: a die block including a first block having a manifold in which a coating solution is held, and a second block on the first block; and a coater shim between the first block and the second block, wherein the coater shim comprises: a master shim including a first guide plate and a second guide plate spaced apart from each other in a first direction with the manifold interposed therebetween, each of the first guide plate and the second guide plate not covering the manifold; a first auxiliary shim at one side of the first guide plate, the first auxiliary shim including a first inner region overlapping a first edge portion of the manifold; and a second auxiliary shim at one side of the second guide plate, the second auxiliary shim including a second inner region overlapping a second edge portion of the manifold.

Description

Slot die coater

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

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0127703, filed September 25, 2023, and all contents of the document in that Republic of Korea Patent Application are incorporated herein by reference.

[0003] With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. These secondary batteries essentially include an electrode assembly, which is a power generation element. The electrode assembly has a structure in which a positive electrode, a separator, and an anode are laminated at least once. The positive and negative electrodes are manufactured by coating and drying a positive active material slurry and a negative active material slurry onto a current collector made of aluminum foil and copper foil, respectively. To ensure uniform charge / discharge characteristics of the secondary battery, the positive active material slurry and negative active material slurry must be evenly coated onto the current collector, and a slot die coater is typically used for this process.

[0004] The technical problem to be achieved by the present invention is to provide a slot die coater including a coater core.

[0005] In order to solve the above-described problem, the technical idea of ​​the present invention provides a slot die coater including a die block including a first block having a manifold for receiving 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 not covering the manifold; a first auxiliary shim located on one side of the first guide plate and including a first inner region overlapping a first edge portion of the manifold; and a second auxiliary shim located on one side of the second guide plate and including a second inner region overlapping a second edge portion of the manifold.

[0006] In exemplary embodiments, the master shim further comprises a base plate having one end connected to the first guide plate and the other end connected to the second guide plate, wherein the first auxiliary shim extends from the base plate along one side of the first guide plate toward the discharge port of the die block, and the second auxiliary shim extends from the base plate along one side of the second guide plate toward the discharge port of the die block.

[0007] In exemplary embodiments, the width of the first inner region of the first auxiliary core in the first direction and the width of the second inner region of the second auxiliary core in the first direction are each characterized in that they are between 4 mm and 300 mm.

[0008] In exemplary embodiments, 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 first guide plate, and a width of the first outer region of the first auxiliary shim in the first direction and a width of the second outer region of the second auxiliary shim in the first direction are each characterized in that they are between 5 mm and 50 mm.

[0009] In exemplary embodiments, 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, and the first hole and the second hole are each characterized in that they are slot holes in which a length in the first direction is smaller than a length in a second direction perpendicular to the first direction.

[0010] In exemplary embodiments, the end of the first auxiliary core and the end of the second auxiliary core are each characterized in that they are spaced apart from the end of the first block in the second direction.

[0011] In exemplary embodiments, the device 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 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; and a second bolt that passes through a second bolt hole of the second auxiliary shim and is fastened to a 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 characterized in that they are slot holes in which a length in the first direction is smaller than a length in a second direction perpendicular to the first direction.

[0012] In exemplary embodiments, when viewed in a plan view, the first auxiliary core and the second auxiliary core are each characterized in having a rectangular shape with a uniform width in the first direction.

[0013] In exemplary embodiments, at least one of the first auxiliary core and the second auxiliary core is characterized by including a region whose width decreases as it approaches the discharge port of the die block.

[0014] In exemplary embodiments, at least one of the first auxiliary core and the second auxiliary core is characterized by including a region whose width increases as it approaches the discharge port of the die block.

[0015] In exemplary embodiments, the first auxiliary core and the second auxiliary core are not vertically overlapped with the master core, and a distance between the first auxiliary core and the second auxiliary core in the first direction is smaller than a width of the manifold in the first direction.

[0016] In order to solve the above-described problem, the technical idea of ​​the present invention comprises a die block including a first block having a manifold for receiving 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 base plate extending in a first direction, a first guide plate extending in a second direction from the base plate toward a 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, wherein the first guide plate and the second guide plate are 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; And a second auxiliary shim that is fastened to the first block by a second fastening member and includes a second hole into which the second fastening member is inserted; wherein the first auxiliary shim and the second auxiliary shim are between the first guide plate and the second guide plate, and the length of the first hole of the first auxiliary shim in the second direction is 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 is greater than the length of the second hole of the second auxiliary shim in the first direction.

[0017] In exemplary embodiments, the end of the first auxiliary core and the end of the second auxiliary core are each characterized in that they are spaced apart from the end of the first block in the second direction.

[0018] In exemplary embodiments, the first auxiliary core and the second auxiliary core are each characterized in that they extend in the second direction from the base plate toward the discharge port of the die block.

[0019] In exemplary embodiments, the first auxiliary core is connected to one side of the first guide plate, and the second auxiliary core is connected to one side of the second guide plate.

[0020] According to exemplary embodiments of the present invention, the coater shim includes a master shim and first and second auxiliary shims, and both edge portions of a manifold provided in a 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 portions other than the slot of the slot die coater.

[0021] Furthermore, according to exemplary embodiments of the present invention, the holes of the first and second auxiliary shims for fastening the first and second auxiliary shims to the die block are configured as slot holes extending in the discharge direction of the coating liquid, thereby allowing an offset distance to be adjusted in response to polishing or deformation of the die block. This eliminates the hassle of having to re-manufacture the coater shims each time polishing or deformation of the die block occurs, thereby reducing the process cost of using a slot die coater.

[0022] 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.

[0023] FIG. 1 is a cross-sectional view showing a slot die coater according to exemplary embodiments of the present invention.

[0024] FIG. 2 is an exploded perspective view showing a slot die coater according to exemplary embodiments of the present invention.

[0025] FIG. 3 is a plan view showing a coater core of a slot die coater according to exemplary embodiments of the present invention.

[0026] FIG. 4 is a plan view showing a portion of a slot die coater according to exemplary embodiments of the present invention.

[0027] Figure 5 is a cross-sectional view taken along line AA-AA' of Figure 4.

[0028] FIG. 6 is a plan view showing a portion of a slot die coater according to exemplary embodiments of the present invention.

[0029] Fig. 7 is a cross-sectional view taken along line BB-BB' of Fig. 6.

[0030] FIG. 8 is a plan view showing a portion of a slot die coater according to exemplary embodiments of the present invention.

[0031] FIG. 9 is a plan view showing a portion of a slot die coater according to exemplary embodiments of the present invention.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036]

[0037] (Example 1)

[0038] FIG. 1 is a cross-sectional view illustrating a slot die coater (10) according to exemplary embodiments of the present invention. FIG. 2 is an exploded perspective view illustrating a slot die coater (10) according to exemplary embodiments of the present invention. FIG. 3 is a plan view illustrating a coater core (200) of a slot die coater (10) according to exemplary embodiments of the present invention.

[0039] Referring to FIGS. 1 to 3, a slot die coater (10) may be configured to apply a coating solution (420) onto a substrate (410) that is moved by a coating roll (310). In exemplary embodiments, the substrate (410) may be a current collector, and the coating solution (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 solution (420) discharged from the slot die coater (10) may form a coating layer applied on one surface of the substrate (410).

[0040] A 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 form a slot (130) corresponding to a passage through which a coating liquid (420) flows. The slot (130) may be connected to a discharge port (140) of the die block (100) through which the coating liquid (420) is discharged.

[0041] The first block (110) may include a manifold (111) that receives a coating liquid (420). The manifold (111) may be a recessed space from the upper surface of the first block (110) and may be connected to a slot (130) between the first block (110) and the second block (120). When a direction parallel to the discharge direction of the coating liquid (420) is referred to as a second direction (e.g., X direction) and a direction perpendicular to the discharge direction of the coating liquid (420) is referred to as a first direction (e.g., Y direction), a length of the manifold (111) along the first direction (e.g., Y direction) may be greater than a length of the manifold (111) along the second direction (e.g., X direction). A liquid supply unit located outside the die block (100) can supply a 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 in the discharge direction (e.g., X direction) through the discharge port (140) of the die block (100).

[0042] The cotter core (200) may include a master core (201), a first auxiliary core (240), and a second auxiliary core (250).

[0043] The master shim (201) is placed between the first block (110) and the second block (120), and can be fastened and fixed to the die block (100). The master shim (201) can have a generally uniform thickness. The master shim (201) can be fastened and fixed to the upper surface of the first block (110). The master shim (201) can be fastened and fixed to the first block (110) so as not to cover the manifold (111) or overlap the manifold (111) in a vertical direction (e.g., Z direction).

[0044] 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 form one body. The base plate (210) may extend in a first direction (e.g., in 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., in the Y direction) and may extend in a second direction (e.g., in the X direction) from the one end of the base plate (210) along the first direction (e.g., in the Y direction) toward an end of a die block (100) provided with a discharge port (140). The first guide plate (220) is connected to the other end of the base plate (210) along the first direction (e.g., Y direction) and can extend in a second direction (e.g., X direction) from the other end of the base plate (210) along the first direction (e.g., Y direction) toward the end of the die block (100) provided with the discharge port (140). The first guide plate (220) and the second guide plate (230) can be spaced apart in the first direction (e.g., Y direction) with the manifold (111) interposed therebetween. The first guide plate (220) and the second guide plate (230) can be arranged so as not to cover the manifold (111), respectively. The first guide plate (220) and the second guide plate (230) can each have a rectangular shape with a uniform width along the first direction (e.g., Y direction).

[0045] The first auxiliary shim (240) and the second auxiliary shim (250) may be fastened and fixed to the die block (100), respectively. The first auxiliary shim (240) and the second auxiliary shim (250) may each have a generally uniform thickness. The first auxiliary shim (240) and the second auxiliary shim (250) may be fastened and fixed to the upper surface of the first block (110), respectively. The first auxiliary shim (240) and the second auxiliary shim (250) may be positioned on the same plane as the master shim (201). The first auxiliary shim (240) and the second auxiliary shim (250) are provided in the lateral direction (e.g., the X direction and / or the Y direction) of the master shim (201) and do not overlap in the vertical direction (e.g., the Z direction).

[0046] The first auxiliary shim (240) may be arranged on one side of the first guide plate (220), and the second auxiliary shim (250) may be arranged 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., in 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 core (250) may extend in a second direction (e.g., in the X direction) from the base plate (210) toward the end of the die block (100). The first auxiliary core (240) and the second auxiliary core (250) may each have a rectangular shape with a uniform width along the first direction (e.g., in the Y direction).

[0047] The first auxiliary core (240) and the second auxiliary core (250) may be spaced apart in a first direction (e.g., Y direction). The slot (130) may be understood as a space between the first auxiliary core (240) and the second auxiliary core (250). The width of the slot (130) along the first direction (e.g., Y direction) may correspond to the distance between the first auxiliary core (240) and the second auxiliary core (250) along the first direction (e.g., Y direction). The width of the slot (130) along the first direction (e.g., Y direction) may be smaller than the width of the manifold (111) along the first direction (e.g., Y direction).

[0048] The first auxiliary shim (240) and the second auxiliary shim (250) may each cover a portion of the manifold (111). The first auxiliary shim (240) may include a first inner region (241) covering a first edge portion of the manifold (111) or overlapping a first edge portion of the manifold (111), and a first outer region (242) located between the manifold (111) and the first guide plate (220) in a first direction (e.g., Y direction). The second auxiliary shim (250) may include a second inner region (251) covering a second edge portion of the manifold (111) or overlapping a second edge portion of the manifold (111), and a second outer region (252) located between the manifold (111) and the second guide plate (230) in a first direction (e.g., Y direction). The first inner region (241) of the first auxiliary core (240) may be referred to as a first overlapping region, and the second inner region (251) of the second auxiliary core (250) may be referred to as a second overlapping region. The first edge portion and the second edge portion of the manifold (111) are opposite ends of the manifold (111) along the first direction (e.g., Y direction), and the coating liquid (420) is supplied to the slot (130) through the center portion of the manifold (111) between the first edge portion and the second edge portion of the manifold (111).

[0049] In the slot die coater according to the comparative example, the boundary between the auxiliary shim and the master shim is above the manifold, and in this case, there is a concern that 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 causes internal contamination of the slot die coater and reduces the uniformity of the coating process.

[0050] However, according to exemplary embodiments of the present invention, both edges of the manifold (111) are completely covered by the first auxiliary shim (240) and the second auxiliary shim (250), and the boundaries between each of the first auxiliary shim (240) and the second auxiliary shim (250) and the master shim (201) are located on the outside of the manifold (111). Accordingly, it is possible to prevent the coating solution (420) provided from the manifold (111) from leaking to other parts other than the slot (130).

[0051] In exemplary embodiments, the width (W1) of the first inner region (241) of the first auxiliary shim (240) along the first direction (e.g., Y direction) and the width (W3) of the second inner region (251) of the second auxiliary shim (250) along the first direction (e.g., 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 concern that the thickness deviation of the coating solution (420) applied on the substrate (410) may increase. For example, the width (W1) of the first inner region (241) of the first auxiliary core (240) along the first direction (e.g., Y direction) and the width (W3) of the second inner region (251) of the second auxiliary core (250) along the first direction (e.g., 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 core (240) along the first direction (e.g., Y direction) and the width (W3) of the second inner region (251) of the second auxiliary core (250) along the first direction (e.g., 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., Y direction), respectively.

[0052] In exemplary embodiments, 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, the coating solution (420) provided from the manifold (111) can be effectively prevented from leaking to a part other than the slot (130).

[0053]

[0054] (Example 2)

[0055] Fig. 4 is a plan view showing a portion of a slot die coater (10) according to exemplary embodiments of the present invention. Fig. 5 is a cross-sectional view taken along line AA-AA' of Fig. 4. Fig. 6 is a plan view showing a portion of a slot die coater (10) according to exemplary embodiments of the present invention. Fig. 7 is a cross-sectional view taken along line BB-BB' of Fig. 6.

[0056] Referring to FIGS. 4 to 7 together with FIGS. 1 to 3, the first auxiliary core (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)).

[0057] In exemplary embodiments, 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 be vertically overlapped with a corresponding hole of the first block (110), and the first bolt hole (245) may be vertically overlapped with a corresponding hole of 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 and fixed into a corresponding hole of the first block (110). The first bolt (153) can be inserted and fastened into the corresponding hole of the first block (110) by passing through the first bolt hole (245) of the first auxiliary shim (240). When the first auxiliary shim (240) is mounted on the first bolt (153), the first auxiliary shim (240) can be aligned and fastened to the target position using the first fixing pin (151), and then the first auxiliary shim (240) can be fastened to the first block (110) using the second bolt.

[0058] In exemplary embodiments, the first pin hole (243) and the first bolt hole (245) of the first auxiliary core (240) may each be a slot hole having a short axis parallel to the first direction (e.g., the Y direction) and a long axis parallel to the second direction (e.g., the X direction). That is, the length of the first pin hole (243) along the second direction (e.g., the X direction) may be greater than the length of the first pin hole (243) along the first direction (e.g., the Y direction), and the length of the first bolt hole (245) along the second direction (e.g., the X direction) may be greater than the length of the 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., 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 position between the first fixing pin (151) and the first pin hole (243) and the relative position 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 on the substrate (410). The offset distance (OD) can be modified by polishing or deformation of the die block (100). According to the present invention, 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 the polishing or deformation of the die block (100). Therefore, the hassle of having to re-manufacture the coater shim (200) every time the die block (100) is polished or deformed can be eliminated, thereby reducing the process cost using the slot die coater (10).

[0059] The second auxiliary shim (250) may also have substantially the same configuration as the first auxiliary shim (240). Although the first auxiliary shim (240) has been described in FIGS. 4 to 7, a person skilled in the art will be able to 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 of the second auxiliary shim (250) and be inserted and fastened into a corresponding hole of the first block (110), and the second bolt may pass through a second bolt hole of the second auxiliary shim (250) and be inserted and fastened into a corresponding hole of the first block (110). The second pin hole and the second bolt hole of the second fixed pin may be slot holes having a short axis parallel to the first direction (e.g., Y direction) and a long axis parallel to the second direction (e.g., X direction), respectively. By adjusting the relative position between the second fixed pin and the second pin hole and the relative position between the second bolt and the second bolt hole, 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.

[0060]

[0061] (Example 3)

[0062] Fig. 8 is a plan view illustrating a portion of a slot die coater according to exemplary embodiments of the present invention. Hereinafter, the slot die coater of Fig. 8 will be described, focusing on differences from the slot die coater (10) described with reference to Figs. 1 to 3.

[0063] Referring to FIG. 8 together with FIG. 1, in the coater core (200A), the first auxiliary core (240A) and the second auxiliary core (250A) may each include a region whose width in the first direction (e.g., Y direction) increases as they get closer to the discharge port (140) of the die block (100). When the first auxiliary core (240A) 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 first auxiliary core (240A) in the first direction (e.g., Y direction) may be larger than the width of the first portion of the first auxiliary core (240A) in the first direction (e.g., Y direction), and the width of the second portion of the first auxiliary core (240A) in the first direction (e.g., Y direction) may increase as they get closer to 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) may be larger 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) may increase as it approaches the discharge port (140) of the die block (100).

[0064]

[0065] (Example 4)

[0066] Fig. 9 is a plan view illustrating a portion of a slot die coater according to exemplary embodiments of the present invention. Hereinafter, the slot die coater of Fig. 9 will be described, focusing on differences from the slot die coater (10) described with reference to Figs. 1 to 3.

[0067] Referring to FIG. 9 together with FIG. 1, in the coater core (200B), the first auxiliary core (240B) and the second auxiliary core (250B) may each include a region whose width in the first direction (e.g., Y direction) decreases as they get closer to the discharge port (140) of the die block (100). When the first auxiliary core (240B) 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 first auxiliary core (240B) in the first direction (e.g., Y direction) may be smaller than the width of the first portion of the first auxiliary core (240B) in the first direction (e.g., Y direction), and the width of the second portion of the first auxiliary core (240B) in the first direction (e.g., Y direction) may decrease as they get closer to 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) may be 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) may decrease as it gets closer to the discharge port (140) of the die block (100).

[0068] 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 die block including a first block having a manifold for receiving a coating liquid and a second block on the first block; and including a cotter core between the first block and the second block; The above cotter plant, A master shim comprising a first guide plate and a second guide plate spaced apart in a first direction with the manifold interposed therebetween, wherein the first guide plate and the second guide plate do not cover the manifold, respectively; A first auxiliary core including a first inner region on one side of the first guide plate and overlapping the first edge portion of the manifold; and A second auxiliary core including a second inner region on one side of the second guide plate and overlapping the second edge portion of the manifold; Slot die coater including.

2. In paragraph 1, The above master core 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 core extends from the base plate along one side of the first guide plate toward the discharge port of the die block, A slot die coater characterized in that the second auxiliary core extends from the base plate along one side of the second guide plate toward the discharge port of the die block.

3. In paragraph 1, A slot die coater, characterized in that the width of the first inner region of the first auxiliary core in the first direction and the width of the second inner region of the second auxiliary core in the first direction are each between 4 mm and 300 mm.

4. In paragraph 1, The first auxiliary core further includes a first outer region between the manifold and the first guide plate, The second auxiliary core further includes a second outer region between the manifold and the first guide plate, A slot die coater, characterized in that the width of the first outer region of the first auxiliary core in the first direction and the width of the second outer region of the second auxiliary core in the first direction are each between 5 mm and 50 mm.

5. In paragraph 1, The first auxiliary core includes a first hole into which a first fastening member configured to fasten the first auxiliary core to the first block is inserted, The second auxiliary core includes a second hole into which a second fastening member configured to fasten the second auxiliary core to the first block is inserted, A slot die coater, characterized in that the first hole and the second hole are each slot holes whose length in the first direction is smaller than their length in the second direction perpendicular to the first direction.

6. In paragraph 5, A slot die coater, characterized in that the ends of the first auxiliary core and the second auxiliary core are each spaced apart from the ends of the first block in the second direction.

7. In paragraph 1, A first fixed pin that passes through the first pinhole of the first auxiliary detent and is inserted into the corresponding hole of the first block; A first bolt passing through the first bolt hole of the first auxiliary deliberation and fastened to the corresponding hole of the first block; A second fixed pin that passes through the second pinhole of the second auxiliary detent and is inserted into the corresponding hole of the first block; and A second bolt passing through the second bolt hole of the second auxiliary deliberation and fastened to the corresponding hole of the first block; Including more, A slot die coater, characterized in that 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 smaller than their length in the second direction perpendicular to the first direction.

8. In paragraph 1, A slot die coater, characterized in that when viewed from a plane, the first auxiliary core and the second auxiliary core each have a rectangular shape with a uniform width in the first direction.

9. In paragraph 1, A slot die coater, characterized in that at least one of the first auxiliary core and the second auxiliary core includes a region whose width becomes smaller as it approaches the discharge port of the die block.

10. In paragraph 1, A slot die coater, characterized in that at least one of the first auxiliary core and the second auxiliary core includes a region whose width increases as it approaches the discharge port of the die block.

11. In paragraph 1, The first auxiliary core and the second auxiliary core do not overlap vertically with the master core, respectively. A slot die coater, characterized in that the distance in the first direction between the first auxiliary core and the second auxiliary core is smaller than the width of the manifold in the first direction.

12. A die block including a first block having a manifold for receiving a coating liquid and a second block on the first block; and including a cotter core between the first block and the second block; The above cotter plant, A master shim comprising 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, wherein the first guide plate and the second guide plate are 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; and A second auxiliary core is fastened to the first block by a second fastening member and includes a second hole into which the second fastening member is inserted; The first auxiliary core and the second auxiliary core are located between the first guide plate and the second guide plate, The length of the first hole of the first auxiliary core in the second direction is greater than the length of the first hole of the first auxiliary core in the first direction, A slot die coater, wherein the length of the second hole of the second auxiliary core in the second direction is greater than the length of the second hole of the second auxiliary core in the first direction.

13. In paragraph 12, A slot die coater, characterized in that the ends of the first auxiliary core and the second auxiliary core are each spaced apart from the ends of the first block in the second direction.

14. In paragraph 12, A slot die coater, characterized in that the first auxiliary core and the second auxiliary core each extend in the second direction from the base plate toward the discharge port of the die block.

15. In paragraph 14, The above first auxiliary core is connected to one side of the above first guide plate, A slot die coater, characterized in that the second auxiliary core is connected to one side of the second guide plate.

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