Coating die head beneficial to material fusion

Abstract

The utility model relates to the technical field of coating devices, in particular to a coating die head beneficial to material fusion, which comprises a die head body and a die head gasket arranged on the die head body, the die head gasket comprises a gasket body communicated with a die head body, the gasket body is provided with a flow channel structure, and the flow channel structure comprises at least two flow channel groups, namely a first flow channel group and a second flow channel group; the first flow channel group comprises a plurality of first flow guide channels for forming a first coating area, and the second flow channel group comprises a second flow guide channel for forming a second coating area; a fusion protruding block used for forming a fusion line is arranged between the first flow guide channel and the second flow guide channel. When a blank area needs to be formed on the foil, slurry is continuously introduced into one or more runner groups, and the slurry is not introduced into the other runner groups or is introduced into the other runner groups at intervals, so that a coating with the blank area can be formed through one-time coating, and the production efficiency and the yield are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of coating devices, and particularly to a coating die head that facilitates material fusion. Background Art

[0002] During the production process of the electrode sheets of lithium-ion batteries, it is necessary to uniformly coat the slurries of the positive and negative electrodes onto the current collector foils, and blank areas need to be left on the foils as conductive electrode tabs. The blank areas are usually regular rectangular slots. The conventional treatment method is to first coat a complete coating on the foil, and then use a laser cleaning process to clean and cut the blank areas to form rectangular slots. However, using the laser cleaning process requires setting multiple processes, which not only affects the production efficiency, but also has problems such as cleaning residues and cleaning dimensions in the laser cleaning process, and directly affects the qualified rate and quality of the products; there is also a method of using three-mode double gasket coating to form the blank areas in one step, but its die head structure is complex and difficult to debug, resulting in high production costs. Summary of the Utility Model

[0003] In order to improve the problems of low production efficiency and high production costs existing in forming a coating with blank areas in the related art, the present utility model provides a coating die head that facilitates material fusion.

[0004] A coating die head that facilitates material fusion includes a die head body and a die head gasket provided on the die head body; the die head gasket includes a gasket body communicated with the die head body, the gasket body is provided with a flow channel structure, and the flow channel structure includes at least two types of flow channel groups, namely a first flow channel group and a second flow channel group; the first flow channel group includes a plurality of first diversion channels for forming a first coating area, and the second flow channel group includes a second diversion channel for forming a second coating area; there is a fusion bump for forming a fusion line between the first diversion channel and the second diversion channel.

[0005] Further, a plurality of the first diversion channels and a plurality of the second diversion channels are arranged at intervals; the first diversion channel has a first diversion area, the second diversion channel has a second diversion area, and the fusion bump is located between the first diversion area and the second diversion area.

[0006] Further, the first diversion channel has a first feed port and a first discharge port, and the second diversion channel has a second feed port and a second discharge port; the first feed port and the second feed port are located at different heights of the gasket body.

[0007] Further, a plurality of first diversion ribs are arranged in the first diversion area, and the plurality of first diversion ribs are arranged along the width direction of the first diversion area; a plurality of second diversion ribs are arranged in the second diversion area, and the plurality of second diversion ribs are arranged along the width direction of the second diversion area.

[0008] Further, the fusion bump has fusion ends located in the first diversion area and the second diversion area, and the width of the fusion ends gradually decreases in the direction of the first discharge port and the second discharge port.

[0009] Further, the fusion end has 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 fusion end.

[0010] Further, the fusion end has a terminal, and there is a gap for forming a fusion line between the terminal and one side of the gasket body.

[0011] Further, the die head body includes an upper die head and a lower die head disposed on the upper die head, and the die head gasket is disposed between the upper die head and the lower die head.

[0012] Further, the lower die head is provided with at least two material cavities, namely a first material cavity and a second material cavity. The first material cavity communicates with the first diversion channel, and the second material cavity communicates with the second diversion channel.

[0013] Further, the first material cavity is connected with a first feed pipe for feeding, and the second material cavity is connected with a second feed pipe for feeding.

[0014] The utility model has the following advantages:

[0015] 1. For the coating die head of the utility model that is beneficial to material fusion, when a blank area needs to be formed on the foil, slurry is continuously introduced into one or more groups of flow channel groups, while slurry is not introduced or intermittently introduced into other flow channel groups. The fusion bumps will space the flow channel groups. The flow channel groups into which slurry is introduced will coat the slurry on the foil to form a coating, while the flow channel groups into which slurry is not introduced or intermittently introduced will form several blank areas with a certain interval on the foil, so as to form a coating with blank areas in one coating. At the same time, the fusion bumps form a fusion line between the first diversion channel and the second diversion channel, which helps material fusion and thus ensures the dimensional accuracy of the blank areas, thereby effectively improving production efficiency and yield.

[0016] 2. For the coating die head of the utility model, by misplacing the first feed port and the second feed port, that is, the first feed port and the second feed port are at different heights of the main body, the first diversion channel and the second diversion channel can be fed when only one die head is used, which is convenient for controlling each flow channel group, realizes more efficient control and thus ensures the coating efficiency. Description of the Drawings

[0017] 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description 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.

[0018] Figure 1 Structural schematic diagram of a coating die head beneficial to material fusion in an embodiment of the present application;

[0019] Figure 2 Structural schematic diagram of the die head gasket in an embodiment of the present application;

[0020] Figure 3 For Figure 2 Partial enlarged schematic diagram of part A in

[0021] Figure 4 For Figure 2 Partial enlarged schematic diagram of part B in

[0022] Figure 5 For Figure 2 Partial enlarged schematic diagram of part C in

[0023] Figure 6 Coating effect diagram of a coating die head beneficial to material fusion in an embodiment of the present application.

[0024] Explanation of reference numerals:

[0025] 1. Die head body; 11. Upper die head; 12. Lower die head; 121. First material cavity; 122. Second material cavity; 2. Die head gasket; 21. Gasket body; 22. Flow channel structure; 221. First flow channel group; 2211. First diversion channel; 22111. First diversion area; 22112. First feed port; 22113. First discharge port; 2212. First diversion rib; 222. Second flow channel group; 2221. Second diversion channel; 22211. Second diversion area; 22212. Second feed port; 22213. Second discharge port; 2222. Second diversion rib; 23. Fusion bump; 231. Fusion end; 2311. First side; 2312. Second side; 2313. End. Detailed implementation manners

[0026] To make the above objects, features, and advantages of the present application more apparent and understandable, the following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description 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 departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] 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 for illustrative purposes only and do not represent the only implementation.

[0029] Referring to Figure 1 and Figure 2 , a coating die head that facilitates material fusion includes a die head body 1 and a die head gasket 2 disposed on the die head body 1. The die head body 1 is used to supply materials to the die head gasket 2. The die head body 1 includes an upper die head 11 and a lower die head 12 disposed on the upper die head 11. The die head gasket 2 is disposed between the upper die head 11 and the lower die head 12. When the coating die head is coating, the die head body 1 supplies materials to the gasket, and the gasket guides the slurry and then coats it on the foil to form a coating.

[0030] Specifically, the die head gasket 2 includes a gasket body 21 communicating with the die head body 1. A number of hole positions for cooperating with the coating die head are provided on both sides in the length direction of the gasket body 21. A flow channel structure 22 is provided in the middle of the gasket body 21. The flow channel structure 22 is located in the middle of the gasket body 21 to guide the slurry.

[0031] The flow channel structure 22 includes at least two types of flow channel groups. A number of flow channel groups are arranged along the length direction of the gasket body 21, and a number of diversion channels are arranged at intervals. In this embodiment, there are two types of flow channel groups. For the convenience of description, the two types of flow channel groups are divided into a first flow channel group 221 and a second flow channel group 222. The first flow channel group 221 includes a number of first diversion channels 2211 for forming a first coating area, and the second flow channel group 222 includes second diversion channels 2221 for forming a second coating area; a number of first diversion channels 2211 and a number of second diversion channels 2221 are arranged at intervals.

[0032] In this embodiment, in order to adapt to the size of the substrate material, the widths of the first diversion channels 2211 are not all the same, that is, the widths of the first diversion channels 2211 at the outermost two sides will be reduced, while the widths of the first diversion channels 2211 in the middle part are normal widths, that is, the specific widths of each first diversion channel 2211 and the second diversion channel 2221 can be adjusted according to the actual situation and are not fixed values.

[0033] Refer to Figure 3 and Figure 4 As shown in FIGS. and, one end of the flow channel group in the length direction has a feed port, and the other end of the flow channel group in the length direction has a discharge port flush with one side of the gasket body 21. More specifically, one end of the first diversion channel 2211 in the length direction is a first feed port 22112, the first diversion channel 2211 extends along the width direction of the gasket body 21, and the other end of the first diversion channel 2211 in the length direction is a first discharge port 22113, and the first discharge port 22113 is flush with one side of the gasket body 21 in the width direction. When the slurry enters from the first feed port 22112, the slurry will continuously move along the length direction of the first diversion channel 2211 towards the first discharge port 22113 and finally flow out from the first discharge port 22113 and be coated on the substrate material. Similarly, one end of the second diversion channel 2221 in the length direction is a second feed port 22212, the second diversion channel 2221 extends along the width direction of the gasket body 21, and the other end of the second diversion channel 2221 in the length direction is a second discharge port 22213, and the second discharge port 22213 is flush with one side of the gasket body 21 in the width direction.

[0034] Refer to Figure 2 and Figure 5 As shown in FIGS. and, at the same time, there is a fusion bump 23 between the first diversion channel 2211 and the second diversion channel 2221 for forming a fusion line, that is, the fusion bump 23 is located between the first diversion area 22111 and the second diversion area 22211. It should be noted that the fusion bump 23 can specifically be a part of the gasket body 21, and the fusion bump 23 can also specifically be an independent block arranged on the gasket body 21; if there are multiple diversion channels, the fusion bump 23 is located between every two diversion channels.

[0035] The fusion bumps 23 space the runner groups. When a substrate with slots needs to be formed, only the first runner 2211 needs to be fed with slurry, while the second runner 2221 is not fed with slurry or intermittently fed with slurry, so that a coating with slots can be formed in one coating. It can be understood that different or the same slurries can also be fed into the first runner 2211 and the second runner 2221 respectively to form a coating with different or the same slurries integrated. In addition, when more runner groups are provided, the slurry types and slurry conduction of the runner groups can also be adjusted according to needs.

[0036] In order to guide the material flow, the first runner 2211 has a first diversion area 22111 on the side close to the discharge port. The first diversion area 22111 connects the first feed port 22112 and the first discharge port 22113; the second runner 2221 has a second diversion area 22211 on the side close to the discharge port. The second diversion area 22211 connects the second feed port 22212 and the second discharge port 22213. At the same time, the fusion bump 23 has a fusion end 231 located in the first diversion area 22111 and the second diversion area 22211. In order to achieve a better diversion effect, the width of the fusion end 231 gradually decreases from the side far from the discharge port to the side close to the discharge port, that is, the width of the fusion end 231 gradually decreases in the direction of the first discharge port 22113 and the second discharge port 22213. In this embodiment, the fusion end 231 has a first side 2311 located in the first diversion area 22111 and a second side 2312 located in the second diversion area 22211; the first side 2311 and the second side 2312 contract toward the middle of the fusion end 231 to the same extent and evenly, so as to gradually reduce the width. The side of the fusion end 231 close to the discharge port has a terminal 2313, and the width of the terminal 2313 is the minimum width of the fusion end 231. There is a gap for forming a fusion line between the terminal 2313 and one side of the gasket body 21.

[0037] By setting the fusion end 231 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 fusion end 231. Since the side gradually contracts, 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. When the slurry flows to the terminal 2313, the slurry will fill the gap of the terminal 2313 to form a fusion line. On the one hand, the fusion line can ensure the dimensional accuracy of the blank area boundary and avoid burrs. On the other hand, the fusion line can fuse the slurries in the first runner 2211 and the second runner 2221, thereby ensuring the coating quality.

[0038] Meanwhile, a number of first flow guiding ribs 2212 are provided in the first flow guiding area 22111, and the number of first flow guiding ribs 2212 are arranged along the width direction of the first flow guiding area 22111; a number of second flow guiding ribs 2222 are provided in the second flow guiding area 22211, and the number of second flow guiding ribs 2222 are arranged along the width direction of the second flow guiding area 22211. One end in the length direction of the first flow guiding rib 2212 and the second flow guiding rib 2222 is aligned with the feed port, and the other end in the length direction of the first flow guiding rib 2212 and the second flow guiding rib 2222 extends along the length direction of the corresponding flow channel group and faces the discharge port. The first flow guiding rib 2212 and the second flow guiding rib 2222 are used for guiding the slurry on the one hand and for supporting the flow channel structure 22 on the other hand to ensure the structural strength.

[0039] Meanwhile, the widths of both ends in the length direction of the first flow guiding rib 2212 and the second flow guiding rib 2222 gradually decrease in the direction approaching the discharge port or the feed port, and the slurry can also be quickly guided after contacting the first flow guiding rib 2212 and the second flow guiding rib 2222, thereby ensuring the flow efficiency.

[0040] In addition, in order to facilitate the feeding and control of the first flow channel group 221 and the second flow channel group 222, the feed ports of the first flow guiding channel 2211 and the second flow guiding channel 2221 are located at different heights of the gasket body 21. It should be understood that the "height" in this paragraph refers to the positions of the first feed port 22112 and the second feed port 22212 on the gasket body 21 along the width direction. 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 22112 is greater than that of the second feed port 22212, so as to achieve the dislocation of the first feed port 22112 and the second feed port 22212 to cooperate with the feeding.

[0041] In order to cooperate with the die head gasket 2, the lower die head 12 is provided with at least two material cavities, namely a first material cavity 121 and a second material cavity 122. The number of material cavities is the same as and corresponds one-to-one with the number of flow channel groups. The first material cavity 121 communicates with the first flow guiding channel 2211, and the second material cavity 122 communicates with the second flow guiding channel 2221. The first material cavity 121 and the second material cavity 122 are not in communication. Therefore, only by attaching and covering the die head gasket 2 on the lower die head 12, the first material cavity 121 can be independently communicated with the feed port of the first flow guiding channel 2211, and the second material cavity 122 can be independently communicated with the feed port of the second flow guiding channel 2221. The first material cavity 121 is connected with a first feed pipe for feeding, and the second material cavity 122 is connected with a second feed pipe for feeding. The first feed pipe independently feeds the first material cavity 121, and the second feed pipe independently feeds the second material cavity 122.

[0042] Refer to Figure 6, by setting the coating die in this way, when using the coating die for coating, by controlling the on / off and feed rate of the materials in the first flow channel group 221 and the second flow channel group 222, a coating with spaced blank areas can be coated in one forming process.

[0043] 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.

[0044] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on 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 modifications and improvements can still 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 coating die head that facilitates material fusion, characterized in that: The invention comprises a die body (1) and a die gasket (2) arranged on the die body (1); the die gasket (2) comprises a gasket body (21) connected to the die body (1); the gasket body (21) is provided with a flow channel structure (22); the flow channel structure (22) comprises at least two flow channel groups, namely a first flow channel group (221) and a second flow channel group (222); the first flow channel group (221) comprises a plurality of first flow guides (2211) for forming a first coating area, and the second flow channel group (222) comprises a second flow guide (2221) for forming a second coating area; and a fusion protrusion (23) for forming a fusion line is provided between the first flow guide (2211) and the second flow guide (2221).

2. A coating die head that facilitates material fusion according to claim 1, characterized in that: A plurality of the first flow guide channels (2211) and a plurality of the second flow guide channels (2221) are arranged at intervals; the first flow guide channel (2211) has a first flow guide area (22111), the second flow guide channel (2221) has a second flow guide area (22211), and the fusion protrusion (23) is located between the first flow guide area (22111) and the second flow guide area (22211).

3. A coating die head that facilitates material fusion according to claim 2, characterized in that: The first flow guide channel (2211) has a first feed port (22112) and a first discharge port (22113), and the second flow guide channel (2221) has a second feed port (22212) and a second discharge port (22213); the first feed port (22112) and the second feed port (22212) are located at different heights of the gasket body (21).

4. A coating die head that facilitates material fusion according to claim 2, characterized in that: The first flow guide area (22111) is provided with a plurality of first flow guide ribs (2212), and the plurality of first flow guide ribs (2212) are arranged along the width direction of the first flow guide area (22111); the second flow guide area (22211) is provided with a plurality of second flow guide ribs (2222), and the plurality of second flow guide ribs (2222) are arranged along the width direction of the second flow guide area (22211).

5. A coating die head that facilitates material fusion according to claim 3, characterized in that: The fusion protrusion (23) has a fusion end (231) located at the first guide area (22111) and the second guide area (22211), and the width of the fusion end (231) gradually decreases toward the first discharge port (22113) and the second discharge port (22213).

6. A coating die head that facilitates material fusion according to claim 5, characterized in that: The fusion end (231) has a first side edge (2311) located in the first flow guide area (22111) and a second side edge (2312) located in the second flow guide area (22211), and the first side edge (2311) and the second side edge (2312) are uniformly contracted toward the middle of the fusion end (231).

7. A coating die head that facilitates material fusion according to claim 5, characterized in that: The fusion end (231) has an end (2313), and a gap is provided between the end (2313) and one side of the gasket body (21) for forming a fusion line.

8. A coating die head that facilitates material fusion according to any one of claims 1 to 7, characterized in that: The die body (1) comprises an upper die (11) and a lower die (12) arranged on the upper die (11), and the die gasket (2) is arranged between the upper die (11) and the lower die (12).

9. A coating die head that facilitates material fusion according to claim 8, characterized in that: The lower die head (12) is provided with at least two material cavities, namely a first material cavity (121) and a second material cavity (122); the first material cavity (121) is connected to the first flow guide channel (2211), and the second material cavity (122) is connected to the second flow guide channel (2221).

10. A coating die head that facilitates material fusion according to claim 9, characterized in that: The first material chamber (121) is connected to a first material supply pipe for supplying materials, and the second material chamber (122) is connected to a second material supply pipe for supplying materials.

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