Special-shaped gasket capable of rapidly guiding flow of slurry

Abstract

The utility model relates to the technical field of coating devices, in particular to a special-shaped gasket capable of rapidly guiding slurry, which comprises a gasket main body and a guiding structure arranged on the gasket main body, and the guiding structure comprises at least two guiding groups, namely a first guiding group and a second guiding group; the first flow guide group comprises a plurality of first flow guide channels, each first flow guide channel is provided with a first flow guide area, and each first flow guide area is provided with a plurality of first flow guide blocks; the second flow guide set comprises a plurality of second flow guide channels which are provided with second flow guide areas, and the second flow guide areas are provided with a plurality of second flow guide blocks. When the blank areas need to be formed, the slurry is coated on the substrate by the runner group into which the slurry is introduced to form a coating, and the blank areas with certain intervals can be formed on the substrate by the runner group into which the slurry is not introduced. And meanwhile, the flow guide blocks can guide the flowing direction of the slurry and accelerate the flowing rate of the slurry, so that the forming speed and the forming quality of the blank area are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of coating devices, and particularly to a special-shaped gasket for quickly guiding slurry flow. Background Art

[0002] In the manufacturing process of lithium-ion battery electrodes, the key lies in precisely coating the positive and negative electrode slurries onto the current collector foil, and it is necessary to form regular blank areas for setting electrode tabs at specific positions on the foil. The traditional method is to first coat a complete coating on the foil, and then through a laser cleaning process, remove and cut out this part of the blank area to form a slot. However, this method involves multiple complex processes and the accuracy is difficult to control, reducing production efficiency and affecting product quality.

[0003] Currently, although there is a method of directly forming a blank area during coating using a three-mode double-gasket coating die head, with this structure, on the one hand, due to the complexity of its die head design and the difficulty of debugging, the production cost will increase significantly; on the other hand, the flow efficiency of the slurry in the three-mode double-gasket coating die head is low, the size deviation of the formed blank area is large, and there will be defects such as burrs, resulting in a low yield rate. Summary of the Utility Model

[0004] In order to improve the problem that it is difficult to balance the production cost and the yield rate when using a conventional coating die head in related technologies, the present utility model provides a special-shaped gasket for quickly guiding slurry flow.

[0005] A special-shaped gasket for quickly guiding slurry flow includes a gasket main body and a flow guiding structure provided on the gasket main body. The flow guiding structure includes at least two flow guiding groups, namely a first flow guiding group and a second flow guiding group; the first flow guiding group includes a plurality of first flow guiding channels, the first flow guiding channels have a first flow guiding area, and a plurality of first flow guiding blocks are provided in the first flow guiding area; the second flow guiding group includes a plurality of second flow guiding channels, the second flow guiding channels have a second flow guiding area, and a plurality of second flow guiding blocks are provided in the second flow guiding area.

[0006] Further, the first flow guiding block includes a first flow guiding main body, and a plurality of the first flow guiding main bodies extend along the length direction of the first flow guiding area and are arranged parallel to each other; the second flow guiding block includes a second flow guiding main body, and a plurality of the second flow guiding main bodies extend along the length direction of the second flow guiding area and are arranged parallel to each other.

[0007] Further, both ends of the first flow guiding area in the length direction respectively have a first feed port and a second discharge port, both ends of the first flow guiding main body in the length direction respectively have a first input end and a first output end, and the first input end is aligned and located at the junction of the first flow guiding area and the first feed port.

[0008] Furthermore, the width of the first input end gradually decreases from the first diversion main body towards the direction of the first feed port; the width of the first output end gradually decreases from the first diversion main body towards the direction of the first discharge port.

[0009] Furthermore, the spacing distance between several of the first diversion main bodies is 15 - 20 mm; the spacing distance between several of the second diversion main bodies is 15 - 20 mm.

[0010] Furthermore, both ends in the length direction of the second diversion area respectively have a second feed port and a second discharge port, both ends in the length direction of the second diversion main body respectively have a second input end and a second output end, and the second input end is aligned and located at the junction of the second diversion area and the second feed port.

[0011] Furthermore, the width of the second input end gradually decreases from the second diversion main body towards the direction of the second feed port; the width of the second output end gradually decreases from the second diversion main body towards the direction of the second discharge port.

[0012] Furthermore, the first input end and the first feed port are arranged with an inclined transition; the second input end and the second feed port are arranged with an inclined transition.

[0013] Furthermore, the first feed port and the second feed port are arranged in a staggered manner on the gasket main body.

[0014] Furthermore, it further includes a partition structure, and the partition structure includes several partition blocks arranged between several of the diversion groups. The partition blocks have partition ends for spacing several of the diversion groups, and the partition ends are located in the corresponding diversion areas.

[0015] Furthermore, the partition ends have a first side located in the first diversion area and a second side located in the second diversion area, and the first side and the second side uniformly contract towards the middle of the partition end.

[0016] The present utility model has the following advantages:

[0017] 1. A special-shaped gasket for rapidly guiding slurry of the present utility model, by providing at least two guiding groups. When a blank area needs to be formed, slurry is only introduced into one or more of the guiding groups, while the other guiding groups do not receive slurry. The flow channel groups into which slurry is introduced will coat the slurry on the substrate to form a coating, and the flow channel groups without slurry introduced can form blank areas with a certain interval on the substrate. At the same time, by providing corresponding guiding blocks in the guiding area, when the slurry flows into the guiding area and contacts the guiding blocks, the guiding blocks can guide the flowing direction of the slurry and accelerate the flowing rate of the slurry, thereby ensuring the formation speed and formation quality of the blank area, and effectively improving the coating efficiency and yield.

[0018] 2. The special-shaped gasket of the present utility model, by providing an input end and an output end with variable widths on the guiding main body. When the slurry contacts the guiding block, it first contacts the input end, then quickly flows to the guiding main body and the output end, and finally quickly flows from the output end to the discharge port. While effectively guiding the slurry, it can also ensure the structural strength of the gasket main body, thereby ensuring the flowing effect and forming effect of the slurry.

[0019] 3. The special-shaped gasket of the present utility model, by misplacing the feeding ports of the first guiding channel and the second guiding channel, that is, the feeding ports of the first guiding channel and the second guiding channel are at different heights of the main body. It is possible to supply materials to the first guiding channel and the second guiding channel when only using one die head, which is convenient for controlling each flow channel group and achieving more efficient control and coating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is the coating effect diagram of a special-shaped gasket for rapidly guiding slurry in an embodiment of the present application;

[0022] Figure 2 It is the structural schematic diagram of a special-shaped gasket for rapidly guiding slurry in an embodiment of the present application;

[0023] Figure 3 It is Figure 2 The partial enlarged schematic diagram of part A in

[0024] Figure 4 It is Figure 2 The partial enlarged schematic diagram of part B in

[0025] Figure 5 for Figure 2 A partial enlarged schematic diagram of part C in the middle.

[0026] Description of reference numerals:

[0027] 1. Gasket body; 2. Guide structure; 21. First guide group; 211. First guide channel; 2111. First guide area; 2112. First feed port; 2113. First discharge port; 212. First guide block; 2121. First guide body; 2122. First input end; 2123. First output end; 22. Second guide group; 221. Second guide channel; 2211. Second guide area; 2212. Second feed port; 2213. Second discharge port; 222. Second guide block; 2221. Second guide body; 2222. Second input end; 2223. Second output end; 3. Separation block; 31. Separation end; 311. First side edge; 312. Second side edge. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0032] Referring to Figure 1 and Figure 2 , the present application provides a special-shaped gasket for quickly guiding slurry, including a gasket body 1, and further including a guiding structure 2 disposed on the gasket body 1. A plurality of hole positions for cooperating with a coating die head are provided on both sides of the gasket body 1 in the length direction, and the guiding structure 2 is located in the middle of the gasket body 1 for guiding the slurry.

[0033] The guiding structure 2 includes at least two guiding groups, and a plurality of guiding groups are arranged along the length direction of the gasket body 1. In this embodiment, there are two guiding groups. For the convenience of description, the two guiding groups are divided into a first guiding group 21 and a second guiding group 22. The first guiding group 21 and the second guiding group 22 include their respective corresponding a plurality of first guiding channels 211 and a plurality of second guiding channels 221, and the plurality of first guiding channels 211 and the plurality of second guiding channels 221 are arranged at intervals.

[0034] In this embodiment, in order to adapt to the size of the material, the widths of the first guiding channels 211 are not all the same, that is, the widths of the first guiding channels 211 on the outermost two sides will be reduced, while the widths of the first guiding channels 211 in the middle are normal widths, that is, the specific widths of each of the first guiding channels 211 and the second guiding channels 221 can be adjusted according to the actual situation and are not fixed values.

[0035] One end of the guiding group in the length direction has a feed port, and the other end of the guiding group in the length direction has a discharge port flush with one side of the gasket body 1. More specifically, the first guiding channel 211 has a first guiding area 2111. One end of the first guiding area 2111 in the length direction is the first feed port 2112. The first guiding area 2111 extends along the width direction of the gasket body 1. The other end of the first guiding area 2111 in the length direction is the first discharge port 2113, and the first discharge port 2113 is flush with one side of the gasket body 1 in the width direction. When the slurry enters from the first feed port 2112, the slurry will continuously move towards the first discharge port 2113 along the length direction of the first guiding channel 211 and finally flow out from the first discharge port 2113 to be coated on the substrate material. Similarly, the second guiding channel 221 has a second guiding area 2211. One end of the second guiding area 2211 in the length direction is the second feed port 2212. The second guiding area 2211 extends along the width direction of the gasket body 1. The other end of the second guiding channel 221 in the length direction is the second discharge port 2213, and the second discharge port 2213 is flush with one side of the gasket body 1 in the width direction.

[0036] Referring to Figure 2 and Figure 3 , in order to ensure the flow rate of the slurry to better form the coating, a number of first guiding blocks 212 are provided in the first guiding area 2111, and a number of second guiding blocks 222 are provided in the second guiding area 2211. Specifically, the first guiding block 212 includes a first guiding main body 2121. A number of first guiding main bodies 2121 extend along the length direction of the first guiding area 2111 and are arranged parallel to each other. The spacing distance between a number of first guiding main bodies 2121 is 15 - 20 mm. Both ends of the first guiding main body 2121 in the length direction respectively have a first input end 2122 and a first output end 2123. In order to ensure the input speed of the slurry, all the first input ends 2122 are aligned and located at the junction of the first guiding area 2111 and the first feed port 2112, and the first input end 2122 is inclined and transitioned with the first feed port 2112. At the same time, the width of the first input end 2122 gradually decreases from the first guiding main body 2121 towards the direction of the first feed port 2112; the width of the first output end 2123 gradually decreases from the first guiding main body 2121 towards the direction of the first discharge port 2113.

[0037] By setting the first input end 2122 and the first output end 2123 in this way, when the slurry is input from the first feed port 2112, the slurry will contact the first input end 2122. After the slurry contacts the first input end 2122, it is quickly guided to the first guiding main body 2121 and the first output end 2123. Finally, the slurry quickly flows from the first output end 2123 to the first discharge port 2113 to be coated on the foil substrate.

[0038] Referring to Figure 2 andFigure 4 Similarly, the second flow guiding block 222 includes a second flow guiding main body 2221. A plurality of second flow guiding main bodies 2221 extend along the length direction of the second flow guiding area 2211 and are arranged parallel to each other. The spacing distance between the plurality of second flow guiding main bodies 2221 is 15-20 mm. At both ends of the second flow guiding area 2211 in the length direction, there are respectively a second feed inlet 2212 and a second discharge outlet 2213. At both ends of the second flow guiding main body 2221 in the length direction, there are respectively a second input end 2222 and a second output end 2223. The second input end 2222 is aligned and located at the junction of the second flow guiding area 2211 and the second feed inlet 2212, and the second input end 2222 and the second feed inlet 2212 are arranged with an inclined transition. The width of the second input end 2222 gradually decreases from the second flow guiding main body 2221 towards the second feed inlet 2212; the width of the second output end 2223 gradually decreases from the second flow guiding main body 2221 towards the second discharge outlet 2213.

[0039] By providing the first flow guiding block 212 and the second flow guiding main body 2221, the flow rate of the slurry in the first flow guiding group 21 and the second flow guiding group 22 can be ensured, effectively reducing the movement time of the slurry from the feed inlet to the discharge outlet. Especially when interval feeding is required in the flow guiding group to form a blank area, the high flow efficiency can facilitate the debugging of interval feeding and the forming difficulty, thus ensuring the forming quality.

[0040] Referring to Figure 2 and Figure 5 The special-shaped gasket for quickly guiding the slurry also includes a separating structure. The separating structure includes a plurality of separating blocks 3 arranged between the plurality of flow guiding groups. The separating block 3 has a separating end 31 for spacing the plurality of flow guiding groups, and the separating end is located in the corresponding flow guiding area. In this embodiment, separating blocks 3 are arranged between the discharge outlets of the first flow guiding channel 211 and the second flow guiding channel 221. It should be noted that the separating block 3 can specifically be a part of the gasket main body 1, or the separating block 3 can specifically be an independent block body arranged on the gasket main body 1. By using the separating block 3 to space the flow guiding groups, when forming a coating with a blank area, only the slurry is introduced into the first flow guiding channel 211, and no slurry is introduced into the second flow guiding channel 221, then a coating with a blank area can be formed in one coating. It can be understood that different or the same slurries can also be introduced into the first flow guiding channel 211 and the second flow guiding channel 221 respectively to form a coating with different slurries or the same slurry integrated. In addition, when setting more flow guiding groups, the slurry types and slurry conduction of the flow guiding groups can also be adjusted according to needs.

[0041] The partition block 3 has a partition end 31 located at the partition of the first diversion area 2111 and the second diversion area 2211. In order to achieve a better diversion effect, the width of the partition end 31 gradually decreases from the side far away from the discharge port to the side close to the discharge port. In this embodiment, the partition end 31 has a first side 311 located in the first diversion area 2111 and a second side 312 located in the second diversion area 2211; the first side 311 and the second side 312 uniformly and to the same extent contract towards the middle of the partition end 31, so as to gradually reduce the width. The side of the partition end 31 close to the discharge port has a small end facing the discharge port, and the width of the small end is the minimum width of the partition end 31.

[0042] By setting the partition end 31 in this way, when the slurry flows in from the feed port, the slurry gradually fills the diversion area and contacts the side of the partition end 31. Due to the gradual contraction of the side, the slurry will accelerate the diversion to the discharge port after contacting the side, so as to ensure the flow rate of the slurry and avoid the coating unevenness caused by the slurry vacancy during the coating process.

[0043] In addition, in order to facilitate the feeding and control of the first diversion group 21 and the second diversion group 22, the feed ports of the first diversion channel 211 and the second diversion channel 221 are located at different heights of the gasket body 1, that is, the first feed port 2112 and the second feed port 2212 are arranged in a staggered manner on the gasket body 1. It should be understood that the "height" in this paragraph refers to the positions of the first feed port 2112 and the second feed port 2212 along the width direction on the gasket body 1. Since the gasket is usually vertically arranged, the "height" is used to refer to this positional relationship. In this embodiment, the height of the first feed port 2112 is greater than that of the second feed port 2212, so as to achieve the staggering of the first feed port 2112 and the second feed port 2212. When cooperating with feeding, different feed cavities can be set on a die head, and the different feed cavities are respectively communicated with the first feed port 2112 and the second feed port 2212.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0045] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A special-shaped gasket for rapid slurry diversion, characterized in that: The invention comprises a gasket body (1) and a flow guide structure (2) arranged on the gasket body (1), wherein the flow guide structure (2) comprises at least two flow guide groups, namely a first flow guide group (21) and a second flow guide group (22); the first flow guide group (21) comprises a plurality of first flow guide channels (211), the first flow guide channels (211) have a first flow guide area (2111), and the first flow guide area (2111) is provided with a plurality of first flow guide blocks (212); the second flow guide group (22) comprises a plurality of second flow guide channels (221), the second flow guide channels (221) have a second flow guide area (2211), and the second flow guide area (2211) is provided with a plurality of second flow guide blocks (222).

2. A special-shaped gasket for rapid flow-conducting slurry according to claim 1, characterized in that: The first guide block (212) comprises a first guide body (2121), and a plurality of the first guide bodies (2121) extend along the length direction of the first guide area (2111) and are arranged in parallel with each other; the second guide block (222) comprises a second guide body (2221), and a plurality of the second guide bodies (2221) extend along the length direction of the second guide area (2211) and are arranged in parallel with each other.

3. A special-shaped gasket for rapid flow-conducting slurry according to claim 2, characterized in that: The first flow guide area (2111) has a first feed port (2112) and a second discharge port (2213) at two ends in the length direction, and the first flow guide body (2121) has a first input end (2122) and a first output end (2123) at two ends in the length direction, and the first input end (2122) is aligned and located at the junction of the first flow guide area (2111) and the first feed port (2112).

4. A special-shaped gasket for rapid flow-conducting slurry according to claim 3, characterized in that: The width of the first input end (2122) gradually decreases in a direction from the first flow guide body (2121) to the first feed port (2112); and the width of the first output end (2123) gradually decreases in a direction from the first flow guide body (2121) to the first discharge port (2113).

5. The special-shaped gasket for rapid flow-conducting slurry according to claim 3, characterized in that: The spacing distance between a plurality of the first flow-guiding bodies (2121) is 15-20 mm; the spacing distance between a plurality of the second flow-guiding bodies (2221) is 15-20 mm.

6. A special-shaped gasket for rapid flow-conducting slurry according to any one of claims 3 to 5, characterized in that: The second flow guide area (2211) has a second feed port (2212) and a second discharge port (2213) at two ends in the length direction, and the second flow guide body (2221) has a second input end (2222) and a second output end (2223) at two ends in the length direction, and the second input end (2222) is aligned and located at the junction of the second flow guide area (2211) and the second feed port (2212).

7. A special-shaped gasket for rapid flow-conducting slurry according to claim 6, characterized in that: The width of the second input end (2222) gradually decreases from the second flow guide body (2221) toward the second feed port (2212); the width of the second output end (2223) gradually decreases from the second flow guide body (2221) toward the second discharge port (2213).

8. The special-shaped gasket for rapid flow-conducting slurry according to claim 6, characterized in that: The first input end (2122) and the first feed port (2112) are arranged in an inclined transition; the second input end (2222) and the second feed port (2212) are arranged in an inclined transition.

9. The special-shaped gasket for rapid flow-conducting slurry according to claim 7, characterized in that: The first feed port (2112) and the second feed port (2212) are arranged in a staggered manner on the gasket body (1).

10. The special-shaped gasket for rapid flow-conducting slurry according to claim 1, characterized in that: It also comprises a separation structure, which comprises a plurality of separation blocks (3) arranged between the plurality of the guide groups, the separation blocks (3) having separation ends (31) for separating the plurality of the guide groups, the separation ends being located in corresponding guide areas.

11. A special-shaped gasket for rapid flow-conducting slurry according to claim 10, characterized in that: The partition end portion (31) has a first side edge (311) located in the first flow guide area (2111) and a second side edge (312) located in the second flow guide area (2211), and the first side edge (311) and the second side edge (312) shrink uniformly toward the middle of the partition end portion (31).

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