Coated gasket structure and coating die assembly

Abstract

The utility model relates to the technical field of coating die head, especially relates to a kind of coating gasket structure and coating die head assembly.The utility model's coating gasket structure includes the gasket with slurry outlet, and corresponding to slurry outlet, flow resistance piece is rotatably arranged on gasket;Flow resistance piece is located in the thickness direction of gasket one side, and extend along the length direction of gasket, flow resistance piece can be inserted in the flow channel of coating die head, and flow resistance piece is pushed by slurry in flow channel, can swing relative to gasket;In the length direction of flow resistance piece, from the middle part of flow resistance piece to both ends, the width of flow resistance piece gradually decreases.The utility model's coating gasket structure, the flow of slurry in different positions can be adjusted, to improve the phenomenon of lateral surface density uneven, to improve coating quality.

Description

Technical Field

[0001] This utility model relates to the field of coating die head technology, and in particular to a coating gasket structure. This utility model also relates to a coating die head assembly employing this coating gasket structure. Background Technology

[0002] With the continuous development of the lithium battery industry and the increasing pursuit of high energy density and safety, the number of battery layers is showing a downward trend, while the areal density is gradually increasing, typically reaching 18-20 mg / cm³. 2 In high-energy-density batteries, this value is between 23-25 ​​mg / cm³. 2 However, as the surface density of the coating increases, the problem of uneven density in the transverse direction begins to appear.

[0003] However, existing technologies address the problem of uneven lateral surface density by simply preparing multiple sets of gaskets with different opening sizes in advance. When uneven lateral surface density occurs, the gaskets are replaced repeatedly in an attempt to improve the situation. This process is cumbersome and costly, and is not conducive to improving coating quality. Utility Model Content

[0004] In view of this, the present invention aims to propose a coating pad structure to improve the phenomenon of uneven density in the transverse plane and improve the coating quality.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A coating pad structure includes a pad having a slurry outlet and a flow-blocking plate rotatably disposed on the pad corresponding to the slurry outlet.

[0007] The flow-blocking plate is located on one side of the thickness direction of the pad and extends along the length direction of the pad. The flow-blocking plate can be inserted into the flow channel of the coating die, and the flow-blocking plate is pushed by the slurry in the flow channel and can swing relative to the pad.

[0008] Along the length of the flow-blocking plate, the width of the flow-blocking plate gradually decreases from the middle to both ends.

[0009] Furthermore, the gasket includes a main body section, side sections at both ends of the main body section, and a mounting rod between the two side sections; a slurry outlet is formed between the two side sections, and the flow-blocking plate is rotatably mounted on the mounting rod.

[0010] Furthermore, one end of the flow-blocking plate is provided with a mounting groove extending along its length; the flow-blocking plate is mounted on the mounting rod through the mounting groove.

[0011] Furthermore, the mounting rod is positioned close to the main body section, and a connecting rod is provided between the mounting rod and the main body section; the connecting rod divides the flow-blocking plate into multiple segments spaced apart along its length.

[0012] Furthermore, the length of the flow-blocking plate is less than the length of the main body section, and a gap is formed between the two ends of the flow-blocking plate and the corresponding side sections.

[0013] Furthermore, the flow-blocking sheet is made of polytetrafluoroethylene.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] (1) The coating pad structure of this utility model includes a pad with a slurry outlet and a flow-blocking plate rotatably disposed on the pad corresponding to the slurry outlet. The flow-blocking plate is located on one side of the pad in the thickness direction and extends along the length direction of the pad. The flow-blocking plate can be inserted into the flow channel of the coating die, and the flow-blocking plate is pushed by the slurry in the flow channel and can swing relative to the pad. In the length direction of the flow-blocking plate, the width of the flow-blocking plate gradually decreases from the middle to both ends. In this way, the relatively large width in the middle of the flow-blocking plate can form a more obvious blocking and throttling effect on the slurry, effectively controlling the flow rate of the slurry and preventing the slurry from overflowing excessively in the middle, resulting in an excessively high transverse surface density in the middle. When extending to both ends, the width of the flow-blocking plate gradually decreases, which is equivalent to gradually increasing the passage space of the slurry at both ends of the flow-blocking plate. In this way, the flow rate of the slurry at different positions can be adjusted according to the distribution of transverse surface density in the actual coating process, which is beneficial to improving the phenomenon of uneven transverse surface density and thus improving the coating quality.

[0016] (2) The gasket includes a main body section, side sections at both ends of the main body section, and a mounting rod between the two side sections. The space between the two side sections forms a slurry outlet. A flow-restricting plate is rotatably mounted on the mounting rod. This arrangement enhances the overall rigidity of the gasket, thereby ensuring the structural strength of the mounting rod and improving the stability and reliability during the coating process. Simultaneously, the two side sections and the main body section together form the slurry outlet. This design allows control over the shape and size of the slurry outlet, effectively ensuring that the slurry flows out of the outlet at a more uniform and stable flow rate and velocity, thus improving coating quality. Furthermore, the mounting rod facilitates the rotation of the flow-restricting plate onto the gasket.

[0017] (3) One end of the baffle plate is provided with a mounting groove extending along its length. The baffle plate is mounted on the mounting rod through the mounting groove. This design can further improve the ease of installation of the baffle plate, effectively save installation time, and improve equipment assembly efficiency. At the same time, this installation method also facilitates the adjustment of the baffle plate, or allows for quick replacement when the baffle plate is worn and needs to be replaced, reducing equipment downtime and thus improving production efficiency.

[0018] (4) The mounting rod is positioned close to the main body section, and a connecting rod is provided between the mounting rod and the main body section. The connecting rod divides the flow-blocking plate into multiple segments spaced apart along its length. This arrangement enhances the connection strength between the mounting rod and the main body section, thereby improving the reliability of the mounting rod. The segmented flow-blocking plate design allows for localized control of the slurry flow during coating by adjusting each segment, better regulating the slurry flow rate and velocity distribution. This helps reduce uneven lateral surface density caused by uneven slurry flow, thus improving coating quality. Furthermore, the segmented design allows for selective replacement of certain segments in the gasket structure based on actual conditions, without needing to replace the entire flow-blocking plate or gasket, thus giving the coating gasket structure better versatility and adaptability.

[0019] (5) The length of the flow-blocking plate is shorter than the length of the main body section, and a gap is formed between the two ends of the flow-blocking plate and the corresponding side sections. This arrangement reduces the friction between the flow-blocking plate and the side sections during the oscillation process, thereby avoiding wear between the flow-blocking plate and the side sections, and reducing the maintenance cost and replacement frequency of the equipment. At the same time, since there is a gap between the two ends of the flow-blocking plate and the side sections, flow-blocking plates of different sizes can be replaced, thereby realizing the control of local slurry flow rate. This allows the coating pad structure to better adapt to the diverse requirements of different coating processes and products for transverse surface density distribution, effectively improving the flexibility and adaptability of the equipment.

[0020] (6) The flow-blocking plate is made of polytetrafluoroethylene (PTFE), which allows it to operate stably for a long time in slurries containing various chemical components, thus ensuring the stability of the coating process and the reliability of the coating quality. At the same time, PTFE has a low coefficient of friction, resulting in very low friction between the flow-blocking plate and the coating die channel and other components during the oscillation process, thereby reducing wear and extending its service life. Furthermore, PTFE is inexpensive, which helps control equipment costs and facilitates large-scale promotion.

[0021] Another objective of this utility model is to provide a coating die assembly, including an upper die and a lower die with flow channels forming the surrounding structure, and the coating die assembly further includes a coating gasket structure as described above, sandwiched between the upper die and the lower die.

[0022] Furthermore, the flow channel is elongated, and the gasket is arranged along the length of the flow channel; the slurry inlet of the flow channel is located at the middle of the length of the flow-blocking plate.

[0023] Furthermore, the gasket has protrusions at both ends, which protrude outward relative to the upper die head and the lower die head.

[0024] Furthermore, the slurry inlet is located on the lower die head; the flow channel includes a main flow channel and a branch flow channel extending along the width direction of the main flow channel, and the slurry inlet is located at the end of the branch flow channel away from the main flow channel.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] (1) The coating die assembly of this utility model includes an upper die and a lower die with a flow channel forming the structure, and also includes a coating pad structure sandwiched between the upper die and the lower die. With this arrangement, the upper die and the lower die clamp and fix the coating pad, preventing the coating pad from being displaced or deformed under the action of external forces such as slurry flow and equipment vibration. This helps to enable components such as flow-blocking plates to accurately control the slurry flow according to design requirements, thereby improving the accuracy and quality stability of coating.

[0027] (2) The flow channel is long and narrow, and the gasket is set along the length of the flow channel. The slurry inlet of the flow channel is set at the middle of the length of the baffle. With this setting, when the slurry enters from the middle, it can diffuse to both ends under the guidance of the baffle, which helps the slurry to be evenly distributed in the flow channel and avoids the slurry from being overly concentrated in a certain area or insufficiently distributed in other areas, thereby improving the uniformity of coating and effectively ensuring the coating quality.

[0028] (3) The two ends of the gasket are respectively provided with protrusions. The protrusions are set outward relative to the upper and lower mold heads. This setting makes it easier to disassemble the gasket, thereby reducing the difficulty of replacing the gasket and improving the convenience and efficiency of equipment maintenance.

[0029] (4) The slurry inlet is located on the lower die head. The flow channel includes a main channel and branch channels extending along the width of the main channel. The slurry inlet is located at the end of the branch channel away from the main channel. This arrangement allows the slurry to enter the branch channel first and then gradually flow into the main channel under the guidance of the branch channel, reducing eddies and uneven flow. The branch channel, as a buffer zone for the slurry entering the main channel, can effectively prevent the slurry from directly impacting the wall of the main channel. At the same time, the branch channel can perform preliminary diversion and rectification of the slurry, so that the slurry can flow more evenly along the length of the main channel after entering it, providing a uniform slurry distribution for the subsequent coating process, thereby ensuring the consistency of the coating thickness. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of the gasket described in an embodiment of the present utility model;

[0032] Figure 2 for Figure 1 A magnified view of part A in the image;

[0033] Figure 3 This is a schematic diagram of the segmented structure described in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the overall structure of the coating die assembly described in this embodiment of the utility model;

[0035] Figure 5 This is an exploded view of the coating die assembly described in an embodiment of the present invention;

[0036] Figure 6 This is a cross-sectional view of the coating die assembly described in an embodiment of the present invention;

[0037] Figure 7 This is a verification diagram of the coating surface density of the prior art described in the embodiments of this utility model;

[0038] Figure 8 This is a verification diagram of the coating surface density of the coating die head described in this embodiment of the utility model;

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Gasket; 11. Main body section; 12. Side section; 13. Mounting rod; 14. Connecting rod; 16. Lug;

[0041] 2. Baffle plate; 21. Mounting slot; 22. Segment;

[0042] 3. Upper die head; 4. Lower die head; 41. Flow channel; 411. Main flow channel; 412. Branch flow channel; 42. Slurry inlet;

[0043] a. Upper limit; b. Lower limit; c. Median; d. Blade spacing 230mm; e. Blade spacing 250mm; f. Blade spacing 270mm; g. Surface density; h. Surface density selection point in the coating width direction. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0045] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] In the existing technology, the problem of uneven density in the transverse surface is addressed by simply preparing multiple sets of gaskets with different opening sizes in advance. When uneven density occurs, the gaskets are replaced repeatedly in an attempt to improve the situation.

[0050] In view of this, the present invention aims to propose a coating pad 1 structure to improve the phenomenon of uneven density in the transverse direction and enhance the coating quality. In terms of the overall structure, according to... Figures 1 to 6As shown, the coating pad 1 structure includes a pad 1 with a slurry outlet and a flow-blocking plate 2 rotatably disposed on the pad 1 corresponding to the slurry outlet. The flow-blocking plate 2 is located on one side of the pad 1 in the thickness direction and extends along the length direction of the pad 1. The flow-blocking plate 2 can be inserted into the flow channel of the coating die, and is pushed by the slurry in the flow channel, allowing it to swing relative to the pad 1. In the length direction of the flow-blocking plate 2, the width of the flow-blocking plate 2 gradually decreases from the middle to both ends.

[0051] With this configuration, the relatively large width of the middle part of the flow-blocking plate 2 can effectively block and throttle the slurry, thereby controlling the slurry flow rate and preventing excessive slurry outflow in the middle, which would result in an excessively high transverse surface density in the middle. As it extends towards both ends, the width of the flow-blocking plate 2 gradually decreases, which is equivalent to gradually increasing the passage space of the slurry at both ends of the flow-blocking plate 2. This allows the flow rate of the slurry at different positions to be adjusted according to the distribution of transverse surface density during the actual coating process, which helps to improve the phenomenon of uneven transverse surface density and thus improve the coating quality.

[0052] In addition, rotating the baffle plate 2 on the gasket 1 can also disperse the impact force, reduce the deformation and wear caused by the impact of the slurry, and help improve the structural stability and reliability of the baffle plate 2.

[0053] In this embodiment, as a preferred implementation, according to Figures 1 to 3 As shown, the gasket 1 includes a main body section 11, side sections 12 located at both ends of the main body section 11, and a mounting rod 13 located between the two side sections 12. A slurry outlet is formed between the two side sections 12, and a flow-blocking plate 2 is rotatably mounted on the mounting rod 13. This arrangement enhances the overall rigidity of the gasket 1, thereby ensuring the structural strength of the mounting rod 13 and improving the stability and reliability during the coating process. Simultaneously, the two side sections 12 and the main body section 11 together form the slurry outlet. This design allows control over the shape and size of the slurry outlet, effectively ensuring that the slurry flows out of the outlet at a uniform and stable flow rate and speed, thus improving coating quality. Furthermore, the mounting rod also facilitates the rotatable mounting of the flow-blocking plate 2 onto the gasket 1. In this embodiment, as a preferred implementation, according to... Figure 2 and Figure 3 As shown, one end of the baffle plate 2 has a mounting groove 21 extending along its length, and the baffle plate 2 is mounted on the mounting rod 13 through the mounting groove 21. The advantage of this design is that it improves the ease of installation of the baffle plate 2, effectively saving installation time and increasing equipment assembly efficiency. At the same time, this installation method also facilitates the adjustment of the baffle plate 2, or allows for quick replacement when the baffle plate 2 needs to be replaced due to wear, reducing equipment downtime and thus improving production efficiency.

[0054] In this embodiment, as a preferred implementation, such as Figure 2 As shown, the mounting rod 13 is positioned close to the main body section 11, and a connecting rod 14 is provided between the mounting rod 13 and the main body section 11. The connecting rod 14 divides the flow-blocking plate 2 into multiple segments 22 spaced apart along its length. This arrangement enhances the connection strength between the mounting rod 13 and the main body section 11, thereby improving the reliability of the mounting rod 13. Furthermore, the segmented flow-blocking plate 2 design allows for localized control of the slurry flow during coating by adjusting each segment 22, better regulating the slurry flow rate and velocity distribution. This helps reduce lateral surface density unevenness caused by uneven slurry flow, thus improving coating quality.

[0055] Furthermore, the segmented 22 design allows for selective replacement of certain segments 22 in the gasket 1 structure based on actual conditions, without requiring replacement of the entire flow-blocking plate 2 or gasket 1. This results in better versatility and adaptability for the coated gasket 1 structure.

[0056] In this embodiment, as a preferred implementation, such as Figure 1 As shown, the length of the baffle plate 2 is less than the length of the main body section 11, and a gap is formed between each end of the baffle plate 2 and the corresponding side section 12. This arrangement reduces the friction between the baffle plate 2 and the side section 12 during the oscillation process, thereby avoiding wear between the baffle plate 2 and the side section 12, and reducing the maintenance cost and replacement frequency of the equipment.

[0057] Meanwhile, since there is a gap between the two ends of the flow-blocking plate 2 and the side section 12, flow-blocking plates 2 of different sizes can be replaced, thereby achieving local control of slurry flow rate. This allows the coating pad 1 structure to better adapt to the diverse requirements of different coating processes and products regarding transverse surface density distribution, effectively improving the flexibility and adaptability of the equipment.

[0058] In this embodiment, as a preferred implementation, the flow-restricting plate 2 is made of polytetrafluoroethylene (PTFE). The advantage of this design is that its excellent chemical resistance allows it to operate stably for extended periods in slurries containing various chemical components, thus ensuring the stability of the coating process and the reliability of the coating quality. Simultaneously, PTFE has a low coefficient of friction, resulting in very low friction between the flow-restricting plate 2 and the coating die channel and other components during oscillation. Low friction reduces wear on the flow-restricting plate 2, extending its service life. Furthermore, PTFE is inexpensive, which helps control equipment costs and facilitates large-scale adoption. The coating pad 1 structure of this embodiment includes a pad 1 with a slurry outlet and a flow-restricting plate 2 rotatably mounted on the pad 1 corresponding to the slurry outlet. The flow-restricting plate 2 is located on one side of the pad 1 in the thickness direction and extends along the length direction of the pad 1. The flow-restricting plate 2 can be inserted into the channel of the coating die, and is pushed by the slurry in the channel, allowing it to oscillate relative to the pad 1. Along the length of the flow-blocking plate 2, its width gradually decreases from the middle to both ends. This improves the uneven density in the transverse direction and enhances the coating quality.

[0059] Example 2

[0060] This embodiment relates to a coating die assembly, such as Figure 4 and Figure 5 As shown, the device includes an upper die head 3 and a lower die head 4 with flow channels forming the structure, and also includes a coating pad 1 structure from any of Embodiment 1 sandwiched between the upper die head 3 and the lower die head 4. With this configuration, the upper die head 3 and the lower die head 4 clamp and fix the coating pad 1, preventing displacement or deformation of the coating pad 1 under external forces such as slurry flow and equipment vibration. This facilitates the accurate control of slurry flow by components such as the flow-blocking plate 2 according to design requirements, thereby improving the accuracy and quality stability of the coating process.

[0061] It should be noted that related structures not mentioned in this embodiment, such as the upper mold head 3, can refer to the related structures in the prior art, and will not be described in detail here.

[0062] In this embodiment, as a preferred implementation, such as Figure 5 As shown, the flow channel is elongated, with the gasket 1 positioned along its length. The slurry inlet 42 of the flow channel corresponds to the middle of the flow-blocking plate 2 along its length. This arrangement allows the slurry to diffuse towards both ends after entering from the middle, guided by the flow-blocking plate 2. This helps the slurry to distribute evenly within the flow channel, preventing excessive concentration in one area or insufficient distribution in others, thereby improving the uniformity of the coating and effectively ensuring coating quality.

[0063] In this embodiment, as a preferred implementation, such as Figure 4 and Figure 5 As shown, the gasket 1 has protrusions 16 at both ends, which protrude outward relative to the upper die head 3 and the lower die head 4. This design facilitates the disassembly and reassembly of the gasket 1, thereby reducing the difficulty of replacing the gasket 1 and improving the convenience and efficiency of equipment maintenance.

[0064] In this embodiment, as a preferred implementation, such as Figure 5 and Figure 6 As shown, the slurry inlet 42 is located on the lower die head 4. The flow channel 4 includes a main channel 411 and a branch channel 412 extending along the width direction of the main channel 411. The slurry inlet 42 is located at the end of the branch channel 412 away from the main channel 411. This arrangement allows the slurry to first enter the branch channel 412 and then gradually flow into the main channel 411 under the guidance of the branch channel 412, reducing eddies and uneven flow. The branch channel 412, as a buffer area for the slurry to enter the main channel 411, can effectively prevent the slurry from directly impacting the wall of the main channel 411.

[0065] Meanwhile, the branch channel 412 can perform preliminary diversion and rectification of the slurry, so that the slurry can flow more evenly along the length of the main channel 411 after entering the main channel 411, providing a uniform slurry distribution for the subsequent coating process, thereby ensuring the consistency of the coating thickness.

[0066] To ensure the effectiveness of this coating die assembly, a setting of 25 mg / cm² is selected. 2 The verification was conducted under high areal density. At this time, the highest point of the baffle was 12mm, each piece was 49mm long, the height of the lowest point was 0mm, the thickness was 1mm, and the blade spacing was selected as 230mm, 250mm, and 270mm. Figure 7 as well as Figure 8 In the diagram, the vertical axis points to the areal density g, and the horizontal axis points to the areal density selection point h along the coating width direction. The upper limit a is selected as 25.5 mg / cm³. 2 The lower limit b is chosen as 24.5 mg / cm³. 2 The median c is 25 mg / cm³. 2 .

[0067] Due to the unreasonable design of traditional gaskets, such as Figure 7 As shown, at a tool spacing of 230mm, that is Figure 7 As shown by curve d, the slurry flow rate is fast. Because the middle position is close to the feed inlet, more material flows out from the middle, and less material flows out from the edges, which are farther away. Therefore, the areal density is higher in the middle and lower at both sides. When the cutter distance is 270mm, that is... Figure 7As shown by curve f, some slurry will be obstructed during discharge. Since the edge travels a longer distance than the middle, the middle is affected more quickly than the edge, resulting in a surface density that is lower in the middle and higher at the edges. When the cutter distance is 250mm, as shown by curve e in the figure, the curve fluctuates significantly, and the surface density uniformity is poor.

[0068] The coating die assembly in this embodiment, such as Figure 8 As shown, by setting the coating pad structure of Embodiment 1, it can be clearly seen that when the blade distance is 230mm, that is... Figure 8 As shown by curve d, when the tool distance is 250mm, that is... Figure 8 As shown by curve e, and when the tool distance is 270mm, that is... Figure 8 As shown by curve f, the fluctuations of each curve are relatively gentle, indicating that the surface density is relatively stable and there is no lateral unevenness.

[0069] The coating die assembly of this embodiment comprises an upper die 3 and a lower die 4 with a flow channel 4 enclosed by an upper die 3 and a coating gasket structure of any one of the embodiments in Example 1 sandwiched between the upper die 3 and the lower die 4. This allows components such as the flow-blocking plate 2 to accurately control the flow of the slurry according to design requirements, thereby improving the accuracy and quality stability of the coating.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coated gasket structure, characterized in that: It includes a gasket with a slurry outlet, and a flow-blocking plate rotatably disposed on the gasket corresponding to the slurry outlet; The flow-blocking plate is located on one side of the thickness direction of the pad and extends along the length direction of the pad. The flow-blocking plate can be inserted into the flow channel of the coating die, and the flow-blocking plate is pushed by the slurry in the flow channel and can swing relative to the pad. Along the length of the flow-blocking plate, the width of the flow-blocking plate gradually decreases from the middle to both ends.

2. The coated gasket structure according to claim 1, characterized in that: The gasket includes a main body section, side sections at both ends of the main body section, and a mounting rod between the two side sections; A slurry outlet is formed between the two side sections, and the flow-blocking plate is rotatably mounted on the mounting rod.

3. The coated gasket structure according to claim 2, characterized in that: One end of the flow-blocking plate is provided with a mounting groove extending along its length. The flow-blocking plate is mounted on the mounting rod via the mounting slot.

4. The coated gasket structure according to claim 3, characterized in that: The mounting rod is positioned close to the main body section, and a connecting rod is provided between the mounting rod and the main body section; The connecting rod divides the flow-blocking plate into multiple segments spaced apart along its length.

5. The coated gasket structure according to claim 2, characterized in that: The length of the flow-blocking plate is less than the length of the main body section, and a gap is formed between the two ends of the flow-blocking plate and the corresponding side sections.

6. The coated gasket structure according to any one of claims 1 to 5, characterized in that: The flow-blocking sheet is made of polytetrafluoroethylene.

7. A coating die assembly, comprising an upper die and a lower die with flow channels forming the surrounding structure, characterized in that: It also includes a coating pad structure according to any one of claims 1 to 6 sandwiched between the upper die head and the lower die head.

8. The coating die assembly according to claim 7, characterized in that: The flow channel is elongated, and the gasket is arranged along the length of the flow channel; The slurry inlet of the flow channel is located at the middle of the length direction of the flow-blocking plate.

9. The coating die assembly according to claim 7, characterized in that: The gasket has protrusions at both ends, which protrude outward relative to the upper and lower mold heads.

10. The coating die assembly according to claim 8, characterized in that: The slurry inlet is located on the lower die head; The flow channel includes a main channel and a branch channel extending along the width direction of the main channel, and the slurry inlet is located at the end of the branch channel away from the main channel.

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