Coating machine gasket and coating machine

Abstract

The utility model provides a coating machine gasket and a coating machine, and belongs to the technical field of batteries. The coating machine gasket comprises a body; each flow channel part comprises a first section extending from the body and a second section extending from the first section and is provided with at least one flow channel, the at least one flow channel extends from the body to the tail end of the second section to be used for circulating first slurry, the part, located on the second section, of each flow channel comprises a first opening and a second opening, and the first opening is communicated with the second opening. The first opening is closer to the body than the second opening, and the size of the second opening is smaller than that of the first opening.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a coating machine gasket and a coating machine. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the battery production process, the coating process is to use a coater to evenly apply the slurry on the substrate. The coater gasket is an important component in the coater, which can improve the production efficiency and coating quality of the coater. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a coating machine gasket to alleviate, mitigate or eliminate the problems in the related technology.

[0005] An embodiment of the first aspect of the present application provides a coater gasket, comprising: a main body; and at least one flow channel portion, each flow channel portion comprising a first section extending from the main body and a second section extending from the first section, and having at least one flow channel, at least one flow channel extending from the main body to the end of the second section for circulating a first slurry, wherein the portion of each flow channel located in the second section comprises a first opening and a second opening, the first opening being closer to the main body than the second opening, and the size of the second opening being smaller than the size of the first opening.

[0006] In the technical solution of the embodiment of the present application, the size of the second opening is set to be smaller than the size of the first opening, so that the pressure to which the slurry used for coating is subjected when flowing through the second opening increases, and the slurry is squeezed out under the action of pressure, thereby increasing the extrusion pressure of the edge part of the slurry during coating, making the slurry coating more uniform and improving the coating effect.

[0007] In some embodiments, the size of the flow channel gradually decreases from the first opening to the second opening. The gradually decreasing flow channel size gradually increases the pressure on the slurry when it flows through the flow channel, reduces the possibility of uneven coating due to irregular changes in the flow channel size, and increases the stability of the coating process.

[0008] In some embodiments, the coater gasket includes a plurality of flow channel portions, and the plurality of flow channel portions are spaced apart from each other along the first direction. The coater gasket is provided with a plurality of flow channel portions spaced apart from each other, so that coating can be performed in different areas at the same time, thereby improving coating efficiency.

[0009] In some embodiments, any two adjacent flow channel portions among the plurality of flow channel portions and the body define an area for circulating the second slurry, and the area is located between any two adjacent flow channel portions. By defining an area for circulating the second slurry by two adjacent flow channel portions and the body, different types of slurries can be coated simultaneously during the coating process, thereby improving coating efficiency.

[0010] In some embodiments, the body includes a first end and a second end in a first direction, wherein: a first flow channel portion closest to the first end among the plurality of flow channel portions is provided with a flow channel for circulating the first slurry, and / or a second flow channel portion closest to the second end among the plurality of flow channel portions is provided with a flow channel for circulating the first slurry. The flow channel portions at both ends of the coater gasket are provided with only one flow channel, which can reduce the loss of slurry at the coating edge.

[0011] In some embodiments, the first flow channel portion includes a first edge located at the first end and a second edge opposite to the first edge in the first direction, and the second opening of the flow channel opened by the first flow channel portion is close to the second edge, and / or the second flow channel portion includes a third edge located at the second end and a fourth edge opposite to the third edge in the first direction, and the second opening of the flow channel opened by the second flow channel portion is close to the fourth edge. For the flow channel portions arranged at both ends of the coater gasket, the second opening of the flow channel is arranged on a side away from the gasket edge, so that it is closer to the area for circulating the second slurry, thereby improving the slurry fusion effect of the two slurries in the joint area.

[0012] In some embodiments, any of the remaining flow channel portions except the first flow channel portion and the second flow channel portion in the plurality of flow channel portions is symmetrical about a symmetry axis, and the symmetry axis is perpendicular to the first direction. For the flow channel portions that are not arranged at both ends of the coater gasket, setting them to an axisymmetric structure can make the coating more uniform and improve the coating effect.

[0013] In some embodiments, any of the remaining flow channel portions except the first flow channel portion and the second flow channel portion among the plurality of flow channel portions is provided with two flow channels for circulating the first slurry, and the two flow channels are symmetrical to each other about the symmetry axis of the flow channel portion. For the flow channel portions that are not provided at both ends of the coater gasket, since there are areas for circulating the second slurry on both sides thereof, two symmetrical flow channels are provided in these flow channel portions so that the first slurry flows out from two symmetrical outlets, which can simultaneously improve the slurry fusion effect of the slurry bonding areas on both sides.

[0014] In some embodiments, the plurality of flow channel portions are equidistantly spaced apart. By arranging the plurality of flow channel portions equidistantly on the body, the coating is made more uniform and the coating effect is improved.

[0015] In some embodiments, the portion of each flow channel located in the second section extends from the first opening to the second opening in an arc shape. Using an arc-shaped flow channel, the slurry is subjected to a more uniform force in the arc-shaped flow channel, reducing the risk of uneven discharge caused by sudden changes in the flow channel during the flow of the slurry.

[0016] In some embodiments, the ratio of the size of the second opening to the size of the first opening is 1:1.5 to 3. By setting the ratio of the size of the second opening to the size of the first opening, a suitable gasket can be selected according to coating requirements to obtain a better coating effect.

[0017] An embodiment of the second aspect of the present application provides a coating machine, which includes the coating machine gasket in the above embodiment.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0020] Figure 1 This is a schematic diagram of the structure of a coating machine gasket according to some embodiments of the present application;

[0021] Figure 2 This is a schematic diagram of the structure of the flow channel portion located in the middle of the coater gasket in some embodiments of the present application;

[0022] Figure 3 This is a schematic structural diagram of the flow channel portion located at the end of the coater gasket in some embodiments of the present application.

[0023] Description of reference numerals:

[0024] Coating machine gasket 100;

[0025] Body 110, first end 111, second end 112;

[0026] Flow channel portion 120, first section 121, second section 122, flow channel 123, first opening 1231, second opening 1232, first flow channel portion 120a, second flow channel portion 120b, first edge 1201, second edge 1202, third edge 1203, fourth edge 1204;

[0027] A region 130 is provided for circulating the second slurry. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0037] In the battery production process, the coating process is to use a coater to evenly apply the slurry on the substrate. The coater gasket is an important component of the coater, which can improve the production efficiency and coating quality of the coater. There are usually multiple flow channel outlets on the coater gasket, which can coat different types of slurries at the same time. If the slurry coating is not uniform enough, the fusion of the two slurries may not be sufficient at the fusion part of the coating edge of the two slurries, resulting in an incomplete fusion area. When the relevant coating setting parameters of the coater change (for example: the gap between the die head and the back roller increases), this phenomenon of incomplete fusion will become more serious because the slurry outlet size cannot be changed.

[0038] In order to alleviate the problem of incomplete fusion, the inlet size of the slurry flow channel can be made larger than the outlet size. According to Bernoulli's principle, the slurry is subjected to greater pressure at the outlet due to its reduced size, so that the slurry is squeezed out of the flow channel, increasing the extrusion pressure at the edge of the slurry during coating, making the slurry coating more uniform, improving the coating effect, and making the fusion of the combination area of ​​the two slurries more complete.

[0039] Based on the above considerations, in order to solve the problem of incomplete fusion of different slurry areas during the coating process, a coating machine gasket was designed. By setting the outlet size of the flow channel opened on the flow channel part of the gasket to be smaller than the inlet size, the pressure on the slurry at the flow channel outlet is increased, and the extrusion pressure on the edge of the slurry during coating is increased, so that the slurry coating is more uniform.

[0040] The coating machine gasket and coating machine disclosed in the embodiment of the present application can be used, but not limited to, in the production process of power batteries for vehicles, ships or aircraft, etc. Using the coating machine gasket and coating machine disclosed in the present application is conducive to making the slurry coating more uniform and improving the coating effect.

[0041] The present application embodiment provides a coating machine gasket 100, please refer to Figure 1 , the coater gasket 100 comprises:

[0042] Ontology 110;

[0043] At least one flow channel portion 120, each flow channel portion 120 includes a first section 121 extending from the body 110 and a second section 122 extending from the first section 121, and is provided with at least one flow channel 123, at least one flow channel 123 extending from the body 110 to the end of the second section 122 for circulating the first slurry,

[0044] The portion of each flow channel 123 located in the second section 122 includes a first opening 1231 and a second opening 1232 . The first opening 1231 is closer to the body 110 than the second opening 1232 . The size of the second opening 1232 is smaller than that of the first opening 1231 .

[0045] In this context, the term "size" includes the cross-sectional area of ​​the opening and may also refer to the width of the opening when the depth of the flow channel remains constant.

[0046] like Figure 1 As shown, the coater gasket 100 includes a body 110 and at least one flow channel portion 120. The flow channel portion 120 includes a first section 121 and a second section 122. The first section 121 extends from the body 110 and extends from the second section 122. The flow channel portion 120 is also provided with at least one flow channel 123 for circulating the first slurry, and the flow channel 123 extends from the body 110 to the end of the second section 122.

[0047] exist Figure 1 In the example shown, the coater gasket 100 includes four flow channel portions 120. The two flow channel portions 120 located at the two ends are respectively provided with one flow channel 123, and the two flow channel portions 120 located in the middle are respectively provided with two flow channels 123.

[0048] In some embodiments, the first slurry may include insulating materials on the electrode sheet, such as AT11, etc., but the present disclosure is not limited thereto.

[0049] The size of the second opening is set to be smaller than that of the first opening, so that the pressure on the slurry used for coating increases when flowing through the second opening. The slurry is squeezed out under the action of pressure, thereby increasing the extrusion pressure on the edge of the slurry during coating, making the slurry coating more uniform and improving the coating effect.

[0050] According to some embodiments of the present application, the size of the flow channel 123 gradually decreases along the direction from the first opening 1231 to the second opening 1232 .

[0051] like Figure 2 As shown, in the direction from the first opening 1231 to the second opening 1232 , the size of the flow channel 123 gradually decreases rather than changing irregularly.

[0052] If the flow channel size changes irregularly, the pressure on the slurry in the flow channel is also irregular, which cannot effectively increase the extrusion pressure at the edge of the slurry during coating, which may lead to uneven coating. Using a gradually decreasing flow channel size will gradually increase the pressure on the slurry when it flows through the flow channel, reducing the possibility of uneven coating due to irregular changes in the flow channel size and increasing the stability of the coating process.

[0053] According to some embodiments of the present application, the coater gasket 100 includes a plurality of flow channel portions 120 , and the plurality of flow channel portions 120 are spaced apart from each other along a first direction.

[0054] like Figure 1 As shown, a plurality of flow channel portions 120 are arranged at intervals on the body 110, and there is a distance between two adjacent flow channel portions 120. The distance between each two adjacent flow channel portions 120 can be set according to coating requirements.

[0055] The coating machine gasket is provided with multiple flow channel parts at intervals, so that coating can be performed in different areas at the same time, thus improving the coating efficiency.

[0056] According to some embodiments of the present application, any two adjacent flow channel portions 120 among the plurality of flow channel portions 120 and the body 110 define a region 130 for circulating the second slurry, and the region 130 is located between any two adjacent flow channel portions 120 .

[0057] like Figure 1 As shown, since the plurality of flow channel portions 120 are disposed at intervals on the body 110 , two adjacent flow channel portions 120 and the body 110 may define a region 130 for circulating the second slurry.

[0058] In some embodiments, the second slurry is another slurry different from the first slurry and may include an electrode material, such as a lithium iron phosphate material, etc., but the present disclosure is not limited thereto.

[0059] By defining an area for circulating the second slurry through two adjacent flow channel portions and the main body, different types of slurries can be coated simultaneously during the coating process, thereby improving the coating efficiency.

[0060] According to some embodiments of the present application, the body 110 includes a first end 111 and a second end 112 in a first direction, wherein:

[0061] A first flow channel 120a closest to the first end 111 of the plurality of flow channels 120 is provided with a flow channel 123 for circulating the first slurry, and / or

[0062] A second flow channel portion 120 b closest to the second end 112 among the plurality of flow channel portions 120 defines a flow channel 123 for circulating the first slurry.

[0063] like Figure 1 As shown, the body 110 includes a Figure 1 The first end 111 on the left side and the Figure 1 The second end 112 on the middle right side.

[0064] Figure 1 The leftmost flow channel portion 120 is closest to the first end 111, namely, the first flow channel portion 120a. Since the first flow channel portion 120a is only connected to the area 130 on the right side thereof for circulating the second slurry, a flow channel 123 is opened. Figure 1 The rightmost flow channel portion 120 is closest to the second end 112, namely, the second flow channel portion 120b. Figure 3 As shown, since the second flow channel portion 120b is only connected to the area 130 on the left side thereof for circulating the second slurry, one flow channel 123 is opened.

[0065] Only one flow channel is provided at the flow channel parts at both ends of the coating machine gasket, which can reduce the loss of slurry at the coating edge.

[0066] According to some embodiments of the present application, the first flow channel portion 120a includes a first edge 1201 located at the first end 111 and a second edge 1202 opposite to the first edge 1201 in the first direction, the second opening 1232 of the flow channel 123 opened by the first flow channel portion 120a is close to the second edge 1202, and / or

[0067] The second flow channel portion 120 b includes a third edge 1203 located at the second end 112 and a fourth edge 1204 opposite to the third edge 1203 in the first direction. The second opening 1232 of the flow channel 123 defined in the second flow channel portion 120 b is close to the fourth edge 1204 .

[0068] like Figure 1 As shown, the first flow channel portion 120a is connected to the area 130 on the right side thereof for circulating the second slurry. In order to improve the coating effect and make the two slurries coated in the combined area more fully integrated, the second opening 1232 of the flow channel 123 is set at a position closer to the second edge 1202, so that the second opening 1232 is closer to the area 130 on the right side thereof for circulating the second slurry.

[0069] The second flow channel 120b is connected to the area 130 on the left side thereof for circulating the second slurry. In order to improve the coating effect, the two slurries are coated in the combined area and fused more fully, such as Figure 3 As shown, the second opening 1232 of the flow channel 123 is arranged at a position closer to the fourth edge 1204, so that the second opening 1232 is closer to the area 130 on the left side thereof for circulating the second slurry.

[0070] For the flow channel parts arranged at both ends of the coater gasket, the second opening of the flow channel is arranged on the side away from the edge of the gasket, so that it is closer to the area for circulating the second slurry, thereby improving the slurry fusion effect in the joint area of ​​the two slurries.

[0071] According to some embodiments of the present application, any one of the plurality of flow channel portions 120 except the first flow channel portion 120 a and the second flow channel portion 120 b is symmetrical about a symmetry axis, and the symmetry axis is perpendicular to the first direction.

[0072] like Figure 1 As shown, for the flow channel portion 120 disposed in the middle of the body 110, since both sides thereof are connected to the area 130 for circulating the second slurry, these flow channel portions 120 can be set as an axisymmetric structure so that the first slurry can be symmetrically coated.

[0073] For the flow channel parts that are not arranged at both ends of the coater gasket, setting them as an axisymmetric structure can make the coating more uniform and improve the coating effect.

[0074] According to some embodiments of the present application, any one of the plurality of flow channel portions 120 except the first flow channel portion 120a and the second flow channel portion 120b is provided with two flow channels 123 for circulating the first slurry, and the two flow channels 123 are symmetrical to each other about the symmetry axis of the flow channel portion.

[0075] like Figure 1 As shown, for the flow channel portion 120 disposed in the middle of the body 110, since both sides thereof are connected to the area 130 for circulating the second slurry, two symmetrical flow channels 123 are provided. The first slurry flows out of the two symmetrical flow channels 123 and can be well integrated with the second slurry coating areas on both sides at the same time.

[0076] For the flow channel portions that are not arranged at both ends of the coater gasket, since there are areas on both sides for circulating the second slurry, two symmetrical flow channels are opened in these flow channel portions so that the first slurry flows out from two symmetrical outlets, which can simultaneously improve the slurry fusion effect of the slurry combining areas on both sides.

[0077] According to some embodiments of the present application, the plurality of flow channel portions 120 are equally spaced apart.

[0078] like Figure 1 As shown, the distance between any two adjacent flow channel portions 120 is equal, and the size of the area 130 defined by the main body 110 for circulating the second slurry is also the same, which can make the first slurry flowing through each flow channel portion 120 and the second slurry flowing through each area 130 more uniform.

[0079] By arranging a plurality of flow channel portions at equal distances on the main body, coating is made more uniform and coating effect is improved.

[0080] According to some embodiments of the present application, the portion of each flow channel 123 located in the second section 122 extends in an arc shape from the first opening 1231 to the second opening 1232 .

[0081] like Figure 2 and Figure 3 As shown, the flow channel 123 is arc-shaped in the direction from the first opening 1231 to the second opening 1232 .

[0082] The arc-shaped flow channel is used so that the slurry is subjected to a more uniform force in the arc-shaped flow channel, reducing the risk of uneven discharge caused by sudden changes in the flow channel during the flow of the slurry.

[0083] According to some embodiments of the present application, the ratio of the size of the second opening 1232 to the size of the first opening 1231 is 1:1.5-3.

[0084] When the coating setting parameters of the coating machine are changed (for example, the gap between the die head and the backing roller is increased), a better coating effect can be obtained by adaptively changing the ratio of the size of the second opening 1232 to the size of the first opening 1231. In one example, the ratio of the size of the second opening 1232 to the size of the first opening 1231 is 1:2.

[0085] By setting the ratio of the size of the second opening to the size of the first opening, a suitable gasket can be selected according to coating requirements to obtain a better coating effect.

[0086] An embodiment of the present application provides a coating machine, including the coating machine gasket 100 in the above embodiment.

[0087] The coater can increase the extrusion pressure of the edge of the slurry during coating through the coater gasket, so that the slurry coating is more uniform, the coating effect is improved, and the fusion of the bonding area of ​​the two slurries is fuller.

[0088] A specific embodiment of the present application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be interpreted as limiting the present application.

[0089] like Figure 1-Figure 3 As shown, the coater gasket 100 includes a body 110 and four equally spaced flow channel portions 120. The adjacent flow channel portions 120 and the body 110 define three areas 130 for circulating the second slurry.

[0090] Each flow channel portion 120 includes a first section 121 extending from the body 110 and a second section 122 extending from the first section 121. At least one flow channel 123 for circulating the first slurry is provided on each flow channel portion 120. The flow channel 123 extends from the body 110 to the end of the second section 122. The portion of the flow channel 123 located in the second section 122 includes a first opening 1231 and a second opening 1232, and the first slurry flows in from the first opening 1231 and flows out from the second opening 1232 for coating. The flow channel 123 extends in an arc shape from the first opening 1231 to the second opening 1232, and the size gradually decreases. The size of the second opening 1232 is 1:2 to the size of the first opening 1231.

[0091] The body 110 includes a first end 111 on the left side and a second end 112 on the right side in the X direction. Among the four flow channel portions 120, the flow channel portion on the far left is closest to the first end 111, namely the first flow channel portion 120a; the flow channel portion on the far right is closest to the second end 112, namely the second flow channel portion 120b. Only one flow channel 123 is provided on each of the first flow channel portion 120a and the second flow channel portion 120b. The second opening 1232 of the flow channel 123 provided in the first flow channel portion 120a is close to the area 130 on the right side for circulating the second slurry, and is far away from the first end 111; the second opening 1232 of the flow channel 123 provided in the second flow channel portion 120b is close to the area 130 on the left side for circulating the second slurry, and is far away from the second end 112.

[0092] The two flow channel portions 120 disposed in the middle of the body 110 are both configured as axisymmetric structures, with the axis of symmetry being along the Y axis and perpendicular to the first direction X. Two symmetrical flow channels 123 are respectively provided on the two flow channel portions 120 .

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating machine gasket (100), characterized in that: include: A body (110); and at least one flow channel portion (120), each flow channel portion (120) comprising a first section (121) extending from the body (110) and a second section (122) extending from the first section (121), and having at least one flow channel (123), the at least one flow channel (123) extending from the body (110) to the end of the second section (122) for circulating the first slurry, The portion of each flow channel (123) located in the second section (122) includes a first opening (1231) and a second opening (1232), wherein the first opening (1231) is closer to the body (110) than the second opening (1232), and the size of the second opening (1232) is smaller than the size of the first opening (1231).

2. The coating machine gasket (100) according to claim 1, characterized in that: Along the direction from the first opening (1231) to the second opening (1232), the size of the flow channel (123) gradually decreases.

3. The coater gasket (100) according to any one of claims 1 to 2, characterized in that: The coater gasket (100) comprises a plurality of flow channel portions (120), and the plurality of flow channel portions (120) are spaced apart from each other along a first direction.

4. The coating machine gasket (100) according to claim 3, characterized in that: Any two adjacent flow channel portions (120) among the plurality of flow channel portions (120) and the body (110) define a region (130) for circulating the second slurry, and the region (130) is located between the any two adjacent flow channel portions (120).

5. The coating machine gasket (100) according to claim 4, characterized in that: The body (110) comprises a first end (111) and a second end (112) in the first direction, wherein: A first flow channel portion (120a) closest to the first end (111) among the plurality of flow channel portions (120) is provided with a flow channel (123) for circulating the first slurry, and / or A second flow channel portion (120b) closest to the second end (112) among the plurality of flow channel portions (120) is provided with a flow channel (123) for circulating the first slurry.

6. The coating machine gasket (100) according to claim 5, characterized in that: The first flow channel portion (120a) comprises a first edge (1201) located at the first end (111) and a second edge (1202) opposite to the first edge (1201) in the first direction, the second opening (1232) of the flow channel (123) provided in the first flow channel portion (120a) is close to the second edge (1202), and / or The second flow channel portion (120b) includes a third edge (1203) located at the second end (112) and a fourth edge (1204) opposite to the third edge (1203) in the first direction, and the second opening (1232) of the flow channel (123) opened in the second flow channel portion (120b) is close to the fourth edge (1204).

7. The coating machine gasket (100) according to claim 5 or 6, characterized in that: Any one of the remaining flow channel portions (120) except the first flow channel portion (120a) and the second flow channel portion (120b) among the plurality of flow channel portions (120) is symmetrical about a symmetry axis, and the symmetry axis is perpendicular to the first direction.

8. The coater gasket (100) according to claim 7, characterized in that: Any one of the remaining flow channel portions (120) among the plurality of flow channel portions (120) except the first flow channel portion (120a) and the second flow channel portion (120b) is provided with two flow channels (123) for circulating the first slurry, and the two flow channels (123) are symmetrical to each other about the symmetry axis of the flow channel portion (120).

9. The coater gasket (100) according to any one of claims 3 to 8, characterized in that: The plurality of flow channel portions (120) are equally spaced apart.

10. The coater gasket (100) according to any one of claims 1 to 9, characterized in that: The portion of each flow channel (123) located in the second section (122) extends in an arc shape from the first opening (1231) to the second opening (1232).

11. The coater gasket (100) according to any one of claims 1 to 10, characterized in that: The ratio of the size of the second opening (1232) to the size of the first opening (1231) is 1:1.5-3.

12. A coating machine, characterized in that: A coater gasket (100) comprising any one of claims 1-11.

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