A coating device

Abstract

This application provides a coating apparatus, including: a coating blade with a liquid storage chamber, a liquid outlet connected to the liquid outlet end of the liquid storage chamber, and a sliding hole connected to the end of the liquid storage chamber away from the liquid outlet; and a liquid supply assembly, including a liquid outlet rod slidably disposed in the liquid storage chamber and a push rod slidably inserted in the sliding hole. One end of the push rod extends into the liquid storage chamber and is connected to the liquid outlet rod, while the other end of the push rod extends out of the sliding hole. The liquid outlet rod is used to push the solution in the liquid storage chamber out of the liquid outlet, and the push rod is used to push the liquid outlet rod. In the embodiment of this application, the coating apparatus can drive the liquid outlet rod to slide in the liquid storage chamber through the push rod. The liquid storage chamber is simultaneously subjected to the pressure of the liquid outlet rod at various points along its length and flows towards the liquid outlet, making the pressure and flow rate of the solution along the length of the coating blade more uniform. Moreover, the moving speed of the liquid outlet rod directly acts on the solution in the liquid storage chamber, thereby enabling direct and rapid adjustment of the coating liquid output, resulting in more uniform coating.

Description

Technical Field

[0001] This application belongs to the field of coating technology, and more specifically, relates to a coating apparatus. Background Technology

[0002] Coating is a solution-based process for preparing thin films, offering advantages such as diverse materials, adjustable properties, low production costs, and high production efficiency. The key component of coating equipment is the coating die; the uniformity of the solution output from the die directly affects the coating quality and effect.

[0003] Existing coating dies typically have a liquid reservoir designed with one or more outlet chambers to facilitate solution entry through the inlet. During coating, the solution flows from the inlet into the guide tank, reservoir, and slit cutter head under the combined force of the injection pump and gravity. This results in a relatively high flow rate of the solution entering the guide tank. The individual or multiple outlet chambers in the reservoir cause turbulence as the solution enters, leading to uneven solution distribution throughout the reservoir. Furthermore, applying pressure to the reservoir during coating causes some solution to flow out of the slit cutter head along the gasket before reaching the edge of the cutter head, resulting in uneven coating and affecting the coating effect. Utility Model Content

[0004] The purpose of this application is to provide a coating device to solve the technical problem of uneven coating by the coating blade in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a coating apparatus, comprising: A coating blade head, wherein the coating blade head has a liquid storage cavity, a liquid outlet connected to the liquid outlet end of the liquid storage cavity, and a sliding hole connected to the end of the liquid storage cavity away from the liquid outlet; The liquid supply assembly includes a liquid outlet rod slidably disposed in the liquid storage chamber and a push rod slidably inserted in the sliding hole. One end of the push rod extends into the liquid storage chamber and is connected to the liquid outlet rod, and the other end of the push rod extends out of the sliding hole. The liquid outlet rod is used to push the solution in the liquid storage chamber to flow out from the liquid outlet, and the push rod is used to push the liquid outlet rod.

[0006] The push rod can drive the dispensing rod to slide in the liquid storage chamber. When the push rod pushes the dispensing rod to slide towards the liquid outlet, the liquid storage chamber is simultaneously subjected to the pressure of the dispensing rod at all points along its length and flows towards the liquid outlet. This makes the pressure and flow rate of the solution along the length of the coating head more uniform. Moreover, the moving speed of the dispensing rod directly affects the solution in the liquid storage chamber, thereby enabling direct and rapid adjustment of the coating dispensing volume and making the coating more uniform.

[0007] In one embodiment, the dispensing rod is provided with a distribution groove for conveying the coating into the storage chamber, and the push rod has a supply chamber communicating with the distribution groove; the opening of the distribution groove is located on the side of the dispensing rod near the dispensing port.

[0008] By employing the aforementioned technical means, the solution can be transported to the storage chamber.

[0009] In one embodiment, the flow channel is arranged along the length of the liquid outlet rod, and there are multiple push rods arranged at intervals along the length of the liquid outlet rod; there are multiple sliding holes, and each sliding hole corresponds to one of the multiple push rods.

[0010] By employing the above-mentioned technical means, it is beneficial to uniformly and quickly deliver the solution to the storage chamber.

[0011] In one embodiment, the dispensing rod slides against the sidewalls of the liquid storage cavity on both sides along the width direction of the liquid storage cavity; and / or, Each end face of the liquid outlet rod along its length direction slides into contact with the corresponding side wall of the liquid storage cavity.

[0012] By employing the above-mentioned technical means, it is beneficial to ensure coating uniformity.

[0013] In one embodiment, the two side walls of the liquid storage cavity along the thickness direction are mutually parallel planes; the sides of the liquid outlet rod along the width direction of the liquid storage cavity are arc-shaped surfaces or planes. The inner walls of the liquid storage chamber at both ends along the length direction are parallel planes; the two end faces of the liquid outlet rod along the length direction are planes.

[0014] By employing the above-mentioned technical means, it is easy to control the liquid supply component to slide in a straight line.

[0015] In one embodiment, the liquid storage cavity has a first arc-shaped surface at one end near the liquid outlet, and the side of the liquid outlet rod near the liquid outlet is adapted to the first arc-shaped surface; and / or, The liquid storage cavity has a second arc-shaped surface on the side near the sliding hole, and the side of the liquid outlet rod near the sliding hole is adapted to the second arc-shaped surface.

[0016] By adopting the above-mentioned technical means, it is beneficial to reduce dead zones and prevent sedimentation.

[0017] In one embodiment, the coating apparatus further includes a feed pump, a control valve, and a connecting pipe. The connecting pipe connects the feed pump to the liquid supply chamber of the push rod, and the control valve is installed on the connecting pipe to control the opening and closing of the connecting pipe.

[0018] By employing the above-mentioned technical means, it is possible to deliver solution into the liquid supply component.

[0019] In one embodiment, the coating head includes an upper die and a lower die connected to the upper die. The upper die has a first liquid storage tank, a first liquid outlet tank, and a first sliding groove. The lower die has a second liquid storage tank, a second liquid outlet tank, and a second sliding groove. The first liquid outlet tank and the second liquid outlet tank form the liquid outlet. The first liquid storage tank and the second liquid storage tank form the liquid storage cavity. The first sliding groove and the second sliding groove form the sliding hole.

[0020] By adopting the above-mentioned technical means, the processing and assembly of coating blades and liquid supply components are facilitated.

[0021] In one embodiment, the upper die of the cutter head has a first lip on the side near the liquid outlet, and the first lip forms the first liquid outlet groove on the side near the lower die of the cutter head; the thickness of the first lip gradually decreases from the side near the liquid storage cavity to the side away from the liquid storage cavity; and / or, The lower die of the cutter head is provided with a second lip on the side near the liquid outlet, and the second lip forms a second liquid outlet groove on the side near the upper die of the cutter head; the second lip on the side near the liquid outlet of the lower die of the cutter head gradually decreases in size from the side near the liquid storage cavity to the side away from the liquid storage cavity.

[0022] By adopting the above-mentioned technical means, it is beneficial to reduce the thickness at the outlet position and facilitate the coating of the substrate.

[0023] In one embodiment, the thickness of the outlet gradually decreases in the direction away from the storage cavity.

[0024] By adopting the above-mentioned technical means, it is beneficial to increase the liquid output speed during coating and improve the coating uniformity. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the coating apparatus provided in the embodiments of this application; Figure 2 An exploded view of the coating apparatus provided in the embodiments of this application; Figure 3 A cross-sectional view of the coating apparatus provided in an embodiment of this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 2 A three-dimensional structural diagram of the upper die of the middle cutter; Figure 6 for Figure 2 A three-dimensional structural diagram of the lower die of the middle cutter head; Figure 7 for Figure 2 A three-dimensional structural diagram of the central feeding assembly; Figure 8 This is a schematic diagram of a coating apparatus provided in an embodiment of this application.

[0027] The following are the labeling elements in the figure: 10. Coating blade; 101. Liquid outlet; 102. Liquid storage chamber; 1021. First arc-shaped surface; 1022. Second arc-shaped surface; 103. Sliding hole; 11. Upper die of the blade; 111. First liquid outlet groove; 112. First liquid storage groove; 113. First sliding groove; 114. First lip; 12. Lower die of the blade; 121. Second liquid outlet groove; 122. Second liquid storage groove; 123. Second sliding groove; 124. Second lip; 20. Liquid supply assembly; 21. Liquid outlet rod; 211. Flow distribution channel; 22. Push rod; 221. Liquid supply chamber; 30. Feed pump; 31. Control valve; 32. Connecting pipe; 34. Feed tank. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] Slot coating is a coating method in which the coating solution is forced out through the slits of a coating die under pressure and transferred onto the substrate. Existing coating dies typically have a reservoir with one or more outlet chambers. One end of the die has an inlet port, and the other end has an outlet port, allowing the coating solution to enter the outlet chambers through the inlet port and flow out through the slots for coating. The outlet chambers often have a T-shaped or coat hanger-shaped flow channel, which is relatively long. Inconsistent pressure loss during the flow of the coating solution results in a high flow velocity in the middle of the slot outlet and a slow flow velocity at both ends, creating a velocity difference. Because the flow velocity of the coating solution is slower at both ends of the outlet chambers and the slot outlet, dead zones exist in the outlet chambers, which can easily cause coating solution accumulation, affecting the uniformity of composition (such as the sedimentation of conductive agents).

[0033] To address the aforementioned issue of uneven coating, existing solutions typically involve setting adjusting bolts or shims to compensate for the flow rate. However, this approach is slow to respond and cannot adapt to viscosity fluctuations or changes in substrate velocity.

[0034] For the reasons mentioned above, this application provides a coating apparatus, including a coating blade 10 and a liquid supply assembly 20. The liquid supply rod 21 pushes the solution in the liquid storage chamber 102 toward the liquid outlet 101, which helps to control the pressure head of the coating blade 10 at various points along the length direction, so as to control the flow rate of the liquid outlet 101 and the liquid storage chamber 102 at various points along the length direction to be uniform, improve the coating uniformity, and prevent the solution from settling in the liquid storage chamber 102.

[0035] Please refer to the following: Figures 1 to 3The coating apparatus provided in the embodiments of this application will now be described. The coating apparatus includes a coating blade 10 and a liquid supply assembly 20. The coating blade 10 has a liquid storage chamber 102, a liquid outlet 101, and a sliding hole 103. The liquid outlet 101 is connected to the liquid outlet end of the liquid storage chamber 102, and the sliding hole 103 is connected to the end of the liquid storage chamber 102 away from the liquid outlet 101. The liquid supply assembly 20 includes a liquid outlet rod 21 and a push rod 22. The liquid outlet rod 21 is slidably disposed in the liquid storage chamber 102, and the push rod 22 is slidably inserted into the sliding hole 103. One end of the push rod 22 extends into the liquid storage chamber 102 and is connected to the liquid outlet rod 21, and the other end of the push rod 22 extends out of the sliding hole 103. The liquid outlet rod 21 is used to push the solution in the liquid storage chamber 102 to flow out from the liquid outlet 101, and the push rod 22 is used to push the liquid outlet rod 21.

[0036] It should be noted that during the sliding process of the push rod 22 along the sliding hole 103, it can drive the liquid outlet rod 21 to move closer to or away from the liquid outlet 101. When the sliding hole 103 is filled with solution, the push rod 22 pushes the liquid outlet rod 21 from the end of the liquid storage chamber 102 near the sliding hole 103 toward the end of the liquid storage chamber 102 near the liquid outlet 101, so that the solution in the liquid storage chamber 102 is pushed to the liquid outlet 101 and output through the liquid outlet 101 to achieve the coating effect on the substrate. The solution can flow into the storage chamber 102 through the channels opened on the coating head 10 or the liquid supply assembly 20; the outlet 101 is a slit outlet, the storage chamber 102 is set along the length direction Y of the coating head 10, and the outlet 101 is set along the length direction Y of the coating head 10, that is, the length of the outlet 101 is much greater than the thickness of the outlet 101, and the length direction of the outlet 101, the length direction of the storage chamber 102 and the length direction Y of the coating head 10 are the same.

[0037] In this embodiment, the push rod 22 drives the dispensing rod 21 to slide within the liquid storage chamber 102. When the push rod 22 pushes the dispensing rod 21 towards the dispensing port 101, the liquid storage chamber 102 is simultaneously subjected to pressure from the dispensing rod 21 along its length, causing the solution to flow towards the dispensing port 101. This makes the pressure and flow rate of the solution along the length of the coating head 10 more uniform, and the moving speed of the dispensing rod 21 directly affects the solution in the liquid storage chamber 102, thereby enabling direct and rapid adjustment of the coating dispensing volume. The dispensing rod 21 forms a piston-like structure within the liquid storage chamber 102, which helps prevent solution sedimentation and accumulation. Moreover, this eliminates the need for other structures within the liquid storage chamber 102 and the dispensing port 101, which helps maintain good sealing of the solution during the coating process, thus ensuring the stability of the coating process.

[0038] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7The dispensing rod 21 is provided with a distribution groove 211 for conveying the coating to the storage chamber 102. The push rod 22 has a supply chamber 221 that communicates with the distribution groove 211. The opening of the distribution groove 211 is located on the side of the dispensing rod 21 near the dispensing port 101. In this way, the solution can be conveyed through the supply chamber 221 to the distribution groove 211 and then flow into the storage chamber 102, so as to facilitate the delivery of the solution into the storage chamber 102 through the supply assembly 20. This facilitates the processing and sealing of the coating head 10. It can be understood that the sliding hole 103 is located at the inlet end of the storage chamber 102. The inlet end and the outlet end of the storage chamber 102 are respectively located at the two ends of the storage chamber 102 along the depth direction. The depth direction of the storage chamber 102 is the same as the width direction X of the coating head 10. The distribution groove 211 can be directly or indirectly connected to the supply chamber 221 to facilitate the delivery of the solution into the distribution groove 211.

[0039] In one embodiment, the liquid storage chamber 102 is provided with a through hole at one end near the sliding hole 103. The through hole is used to supply air, which facilitates the air to balance the pressure on the side of the liquid outlet rod 21 away from the liquid outlet 101 during the sliding process of the liquid outlet rod 21.

[0040] In another embodiment, the outlet end of the supply chamber 221 is connected to the side of the storage chamber 102 near the sliding hole 103. The outlet end of the supply chamber 221 is equipped with a first one-way valve, which controls the solution to flow unidirectionally from the supply chamber 221 into the storage chamber 102 near the sliding hole 103. The inlet end of the distribution channel 211 is connected to the side of the storage chamber 102 near the sliding hole 103. The inlet end of the distribution channel 211 is equipped with a second one-way valve, which controls the solution to flow unidirectionally from the side of the storage chamber 102 near the sliding hole 103 into the distribution channel 211. This allows for unidirectional flow of the solution into the storage chamber 102 near the outlet 101 as the outlet rod 21 slides back and forth along the storage chamber 102.

[0041] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7 The flow channel 211 is along the length of the liquid outlet rod 21 (refer to...) Figure 7 The system is configured with multiple push rods 22 (located along the Y-axis), arranged at intervals along the length of the liquid outlet rod 21. Multiple sliding holes 103 are also present, each corresponding to one of the push rods 22. Using multiple push rods 22 increases the solution replenishment speed and facilitates rapid and uniform dispersion of the solution into the distribution channel 211. Furthermore, the multiple push rods 22 facilitate pushing the liquid outlet rod 21 along the X-axis, allowing adjustment of the coating amount based on the pushing force of the push rods 22 when coating variations exist at different locations, thus improving coating uniformity.

[0042] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7 The dispensing rod 21 slides against the corresponding sidewall of the storage cavity 102 on each side along the width direction (i.e., the Z-axis direction). This helps prevent the solution on the side of the dispensing rod 21 closest to the outlet 101 from leaking to the side of the dispensing rod 21 furthest from the outlet 101 when it slides toward the outlet 101, ensuring the stability of the solution pressure and flow rate along the width direction Y of the coating head 10 and controlling the output amount of the coating solution per application.

[0043] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7 The two ends of the dispensing rod 21 along its length (i.e., the Y-axis direction) are respectively slidably engaged with the corresponding sidewalls of the liquid storage chamber 102. This helps to prevent the solution on the side of the dispensing rod 21 closest to the liquid outlet 101 from leaking from both ends of the dispensing rod 21 to the side of the dispensing rod 21 furthest from the liquid outlet 101 when the dispensing rod 21 slides toward the liquid outlet 101, thus ensuring the stability of the solution pressure and flow rate along the length X of the coating head 10 and controlling the output amount of the coating solution in a single application.

[0044] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7 The two side walls of the liquid storage cavity 102 along the thickness direction (i.e., the Z-axis direction) Figure 3 The left and right sidewalls of the liquid storage cavity 102 are parallel planes; the two sides of the dispensing rod 21 along the width direction of the liquid storage cavity 102 are arc-shaped surfaces or planes. Here, the arc-shaped surface refers to a cylindrical arc surface. This ensures that the width of the liquid storage cavity 102 is consistent throughout its length, facilitates the sliding fit between the two sides of the dispensing rod 21 and the corresponding sidewalls of the liquid storage cavity 102, prevents leakage, maintains a consistent flow rate, and facilitates the machining of the sliding surfaces.

[0045] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 7 The inner walls at both ends of the liquid storage chamber 102 along its length ( Figure 3 The inner and outer walls of the liquid storage chamber 102 described herein are parallel planes; the two ends of the dispensing rod 21 along its length are planes. This facilitates the sealing and sliding fit between the two ends of the dispensing rod 21 and the inner wall of the liquid storage chamber 102, maintaining consistent flow velocities at both ends.

[0046] In one embodiment of this application, please refer to Figure 3 , Figure 5 and Figure 6The liquid storage chamber 102 has a first arc-shaped surface 1021 at one end near the liquid outlet 101, and the side of the liquid outlet rod 21 near the liquid outlet 101 is adapted to the first arc-shaped surface 1021. This helps to prevent the formation of dead corners that could cause solution sedimentation, and also helps the liquid outlet rod 21 to push out all the solution in the liquid storage chamber 102.

[0047] In one embodiment of this application, please refer to Figure 3 , Figure 5 and Figure 6 The liquid storage cavity 102 has a second arc-shaped surface 1022 on the side near the sliding hole 103, and the side of the dispensing rod 21 near the sliding hole 103 is adapted to the second arc-shaped surface 1022. This helps to prevent the formation of dead corners that could cause solution sedimentation, and also helps the dispensing rod 21 to reset when the solution is injected into the liquid storage cavity 102, so that the solution can fill the liquid storage cavity 102.

[0048] In one embodiment of this application, please refer to Figure 1 , Figure 3 and Figure 8 The coating apparatus also includes a feed pump 30, a control valve 31, and a connecting pipe 32. The connecting pipe 32 connects the feed pump 30 to the liquid supply chamber 221 of the push rod 22. The control valve 31 is mounted on the connecting pipe 32 and is used to control the opening and closing of the connecting pipe 32. Thus, when the feed pump 30 and the control valve 31 are open, solution can be injected into the liquid storage chamber 102. Optionally, the coating apparatus also includes a loading tank 34 for storing solution. This allows for the supply of solution to the coating blade 10.

[0049] In one embodiment of this application, please refer to Figure 2 , Figure 3 and Figure 5 The coating head 10 includes an upper die 11 and a lower die 12, which are connected to the upper die 11. The upper die 11 has a first liquid storage tank 112, a first liquid outlet tank 111, and a first sliding groove 113. The lower die 12 has a second liquid storage tank 122, a second liquid outlet tank 121, and a second sliding groove 123. The first and second liquid outlet tanks 111 and 121 form an outlet 101, the first and second liquid storage tanks 112 and 122 form a liquid storage cavity 102, and the first and second sliding grooves 113 and 123 form a sliding hole 103. This facilitates the processing and assembly of the coating head 10 and the liquid supply assembly 20. The upper die 11 and the lower die 12 are detachably connected, which can be achieved through screws or latches, etc., to facilitate the disassembly of the coating head 10. Alternatively, the upper die 11 and the lower die 12 can adopt the same structure, which helps to reduce processing costs.

[0050] In one embodiment of this application, please refer to Figures 3 to 5The upper die 11 of the cutter head is provided with a first lip 114 on the side near the liquid outlet 101. The side of the first lip 114 near the lower die 12 of the cutter head forms a first liquid outlet groove 111. The thickness of the first lip 114 gradually decreases from the side near the liquid storage cavity 102 to the side away from the liquid storage cavity 102. This helps to reduce the thickness of the upper die 11 at the liquid outlet 101, so as to facilitate the coating operation.

[0051] In one embodiment of this application, please refer to Figure 3 , Figure 4 and Figure 6 The lower die 12 of the cutter head is provided with a second lip 124 on the side near the liquid outlet 101, and the second lip 124 forms a second liquid outlet groove 121 on the side near the upper die 11 of the cutter head. The second lip 124 on the side of the lower die 12 near the liquid outlet 101 gradually decreases in size from the side near the liquid storage cavity 102 to the side away from the liquid storage cavity 102. This helps to reduce the thickness of the lower die 12 at the outlet of the liquid outlet 101, so as to facilitate the coating operation.

[0052] In one embodiment of this application, please refer to Figures 2 to 4 The thickness of the outlet 101 gradually decreases in the direction away from the storage chamber 102. This helps to increase the flow rate of the solution during coating and improve the uniformity of the coating. Optionally, the outlet 101 includes a flow channel section and an outlet section. The two ends of the flow channel section are connected to the storage chamber 102 and the outlet section, respectively. Along the direction of solution outflow: the thickness of the flow channel section is the same, and the thickness of the outlet section gradually decreases.

[0053] The working steps of the coating device in this embodiment are as follows: Step 1: The coating solution is injected into the push rod 21 through the connecting pipe 32, and slowly fills the storage chamber 102 through the liquid supply chamber 221 and the distribution groove 211; Step 2: Close the control valve 31 to stop injecting liquid into the liquid supply chamber 221 of the push rod 22. The push rod 22 pushes the liquid outlet rod 22, causing the coating solution in the liquid storage chamber 102 to flow evenly to the liquid outlet 101. Step 3: Continue to push the push rod 22 to continuously push the liquid outlet rod 21, so that the coating solution flows out of the liquid outlet 101 for coating; Step 4: After coating is completed, push rod 22 moves upward, pulls liquid outlet rod 21 to the initial position, opens control valve 31, and connects pipe 32 to perform liquid replenishment operation for the next coating.

[0054] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coating apparatus, characterized in that, include: A coating blade head, wherein the coating blade head has a liquid storage cavity, a liquid outlet connected to the liquid outlet end of the liquid storage cavity, and a sliding hole connected to the end of the liquid storage cavity away from the liquid outlet; The liquid supply assembly includes a liquid outlet rod slidably disposed in the liquid storage chamber and a push rod slidably inserted in the sliding hole. One end of the push rod extends into the liquid storage chamber and is connected to the liquid outlet rod, and the other end of the push rod extends out of the sliding hole. The liquid outlet rod is used to push the solution in the liquid storage chamber to flow out from the liquid outlet, and the push rod is used to push the liquid outlet rod.

2. The coating apparatus as described in claim 1, characterized in that: The dispensing rod is provided with a distribution groove for conveying the coating into the storage chamber, and the push rod has a supply chamber communicating with the distribution groove; the opening of the distribution groove is located on the side of the dispensing rod near the dispensing port.

3. The coating apparatus as described in claim 2, characterized in that: The flow channel is arranged along the length of the liquid outlet rod, and there are multiple push rods, which are arranged at intervals along the length of the liquid outlet rod; there are multiple sliding holes, which correspond one-to-one with each of the multiple push rods.

4. The coating apparatus as described in claim 2, characterized in that: The dispensing rod slides against the sidewalls of the liquid storage cavity on both sides along the width direction of the liquid storage cavity; and / or, Each end face of the liquid outlet rod along its length direction slides into contact with the corresponding side wall of the liquid storage cavity.

5. The coating apparatus as described in claim 1, characterized in that: The two side walls of the liquid storage cavity along the thickness direction are parallel planes; the sides of the liquid outlet rod along the width direction of the liquid storage cavity are arc-shaped surfaces or planes. The inner walls of the liquid storage chamber at both ends along the length direction are parallel planes; the two end faces of the liquid outlet rod along the length direction are planes.

6. The coating apparatus as described in claim 1, characterized in that: The liquid storage chamber has a first arc-shaped surface at one end near the liquid outlet, and the side of the liquid outlet rod near the liquid outlet is adapted to the first arc-shaped surface; and / or, The liquid storage cavity has a second arc-shaped surface on the side near the sliding hole, and the side of the liquid outlet rod near the sliding hole is adapted to the second arc-shaped surface.

7. The coating apparatus as claimed in claim 1, characterized in that: The coating device also includes a feed pump, a control valve, and a connecting pipe. The connecting pipe connects the feed pump to the liquid supply chamber of the push rod. The control valve is installed on the connecting pipe and is used to control the opening and closing of the connecting pipe.

8. The coating apparatus according to any one of claims 1 to 7, characterized in that: The coating head includes an upper die and a lower die connected to the upper die. The upper die has a first liquid storage tank, a first liquid outlet tank and a first sliding groove. The lower die has a second liquid storage tank, a second liquid outlet tank and a second sliding groove. The first liquid outlet tank and the second liquid outlet tank form the liquid outlet. The first liquid storage tank and the second liquid storage tank form the liquid storage cavity. The first sliding groove and the second sliding groove form the sliding hole.

9. The coating apparatus as described in claim 8, characterized in that: The upper die of the cutter head has a first lip on the side near the liquid outlet, and the first lip forms the first liquid outlet groove on the side near the lower die of the cutter head; the thickness of the first lip gradually decreases from the side near the liquid storage cavity to the side away from the liquid storage cavity; and / or, The lower die of the cutter head is provided with a second lip on the side near the liquid outlet, and the second lip forms a second liquid outlet groove on the side near the upper die of the cutter head; the second lip on the side near the liquid outlet of the lower die of the cutter head gradually decreases in size from the side near the liquid storage cavity to the side away from the liquid storage cavity.

10. The coating apparatus according to any one of claims 1 to 7, characterized in that: The thickness of the liquid outlet gradually decreases in the direction away from the liquid storage cavity.

Images