Coating device

Abstract

The utility model belongs to the technical field of coating, and mainly relates to a coating device which comprises a die head and a gasket clamped in the die head, the die head comprises a discharge port used for discharging coating, a first discharge cavity and a second discharge cavity, the first discharge cavity and the second discharge cavity are arranged at intervals, and the gasket is provided with at least one coating runner. The coating runner comprises a first runner communicated with the first discharging cavity and at least one second runner communicated with the second discharging cavity; through the design, the utilization rate of the base material in the coating process is improved, the problem of belt breakage is avoided, and therefore the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating, and in particular relates to a coating device. Background Art

[0002] Batteries, as key energy supply components in modern electronic devices, have a performance directly impacting the stability and lifespan of these devices. It's no secret that one of the core challenges in the development of battery technology lies in coating technology. L-shaped coating technology, a coating process specifically designed for producing electrode materials with specific shapes (e.g., L-shaped), has significant application value in fields such as lithium battery production.

[0003] Given the substrate's unique geometry and the stringent requirements for coating thickness uniformity, traditional blade coating, roller coating, and spray coating methods struggle to meet the required high precision and consistency standards in practice. Especially for L-shaped coating, these traditional methods can result in material waste rates as high as 30%-40%, which not only increases production costs but is also further exacerbated by frequent pinch breakage during L-shaped coating.

[0004] Based on this, it is urgent to improve the existing coating device to solve the defects of the above-mentioned technology. Utility Model Content

[0005] The purpose of the utility model is to provide a coating device with double discharge cavities to improve the coating accuracy of L-shaped coating and reduce material loss in view of the shortcomings of the existing technology.

[0006] In order to achieve the above-mentioned technical objectives, the present application adopts the following technical solution: a coating device, comprising a die head and a gasket clamped in the die head, the die head comprising a discharge port for discharging the coating, and a first discharge cavity and a second discharge cavity arranged at intervals, the gasket is provided with at least one coating flow channel, the coating flow channel comprising a first flow channel connected to the first discharge cavity and at least one second flow channel connected to the second discharge cavity.

[0007] The above technical solution produces the following technical effects:

[0008] By designing a die head with dual discharge cavities, more precise control of the coating can be achieved, thereby improving coating accuracy, ensuring uniformity of coating thickness on the substrate, and meeting the high-precision requirements for electrode materials in battery production.

[0009] As a further improvement to the coating device of the present invention, the gasket is composed of a first gasket and a second gasket stacked together, the first flow channel and the second flow channel are both arranged on the first gasket, the second gasket is provided with a first feed port and a second feed port, the first flow channel is connected to the first discharge cavity through the first feed port, and the second flow channel is connected to the second discharge cavity through the second feed port.

[0010] As a further improvement to the coating device of the present invention, a guide portion is provided in the coating flow channel, and the guide portion extends along the width direction of the gasket.

[0011] As a further improvement to the coating device of the present invention, the flow guide is provided in the first flow channel.

[0012] As a further improvement to the coating device of the present invention, the flow guide portion includes a first flow guide and a second flow guide that are spaced apart along the length direction of the gasket.

[0013] As a further improvement to the coating device of the present invention, the length of the first flow guide body is less than or equal to the length of the first flow channel, and the length of the second flow guide body is less than the length of the first flow guide body.

[0014] As a further improvement to the coating device of the present invention, a blocking plate is provided between two adjacent coating flow channels.

[0015] As a further improvement to the coating device of the present invention, in the same coating flow channel, the first flow channel and the second flow channel are arranged along the length direction of the gasket, and two second flow channels are provided, which are respectively located on both sides of the first flow channel.

[0016] As a further improvement to the coating device of the present invention, the first flow channel and the second flow channel are connected via a supporting protrusion.

[0017] As a further improvement to the coating device of the present invention, the second discharge cavity is designed to be parallel to the first discharge cavity, and the second discharge cavity is close to the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of implementation mode 1 of the present invention;

[0020] Figure 2 This is an exploded view of the coating device in embodiment 1 of the present invention;

[0021] Figure 3 This is an exploded view of the gasket in Embodiment 2 of the present invention;

[0022] Figure 4 This is a schematic diagram of coating of the coating device in Embodiment 3 of the present invention;

[0023] in:

[0024] 1-die head;

[0025] 11-first discharging cavity;

[0026] 12- second discharging cavity;

[0027] 13-discharging port;

[0028] 2-gasket;

[0029] 210- coating flow channel;

[0030] 220-first gasket;

[0031] 230- second gasket;

[0032] 21-first feed port;

[0033] 22- second feed port;

[0034] 23-first flow channel;

[0035] 231- diversion part;

[0036] 2311-first diversion body;

[0037] 2312-second conducting body;

[0038] 24- second flow channel;

[0039] 25-blocking plate;

[0040] 26-support protrusion;

[0041] 3- substrate;

[0042] 4- Paint. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0044] In the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0045] Although the present application is disclosed as above in terms of a preferred embodiment, it is not intended to limit the claims. Any person skilled in the art may make several possible changes and modifications without departing from the concept of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

[0046] The present invention will be described in further detail below in conjunction with specific implementation methods, but the implementation methods of the present invention are not limited thereto.

[0047] Implementation Method 1

[0048] like Figure 1-2 As shown, in order to improve the coating accuracy of the L-type coating of the coating device and reduce material loss, the present application designs a coating device, which includes a die head 1 and a gasket 2 clamped in the die head 1, the die head 1 includes a discharge port 13 for discharging the coating 4, and a first discharge cavity 11 and a second discharge cavity 12 arranged at intervals, the gasket 2 is provided with at least one coating flow channel 210, the coating flow channel 210 includes a first flow channel 23 connected to the first discharge cavity 11 and at least one second flow channel 24 connected to the second discharge cavity 12.

[0049] Specifically, the die head 1 of the existing coating device generally adopts a separate structure. By adjusting the coordination of the upper and lower coating dies 1, gaskets 2 in different spraying positions can be achieved, and by controlling the discharge amount of the two die heads 1 discharge cavities, the L-type coating effect can be achieved. The coating device mentioned in this embodiment achieves precise control of the coating 4 by improving the design of the die head 1 and the gasket 2, thereby improving the coating accuracy and reducing the loss of material. In this embodiment, the design of the die head 1 in the traditional spraying device is abandoned, and the design of an integrated discharge port 13, a first discharge cavity 11 and a second discharge cavity 12 is adopted to ensure that the coating 4 in the coating flow channel 210 is evenly distributed. At the same time, the connection method between the coating flow channel 210 and the discharge cavity on the gasket 2 is also optimized, so that the coating 4 can flow out more stably during the coating process, thereby ensuring the uniformity of the coating.

[0050] Specifically, the coating device operates as follows: After entering the feed port, the coating material 4 flows into two parallel flow channels. By adjusting the openings of the first and second discharge chambers 11, 12, uniform flow of the coating material 4 within the two chambers is achieved, ensuring coating consistency. Experimental results demonstrate that the dual-chamber design allows for independent control of the coating film size, enabling seamless fusion of two substrates 3 of varying sizes.

[0051] Furthermore, in terms of the design of the die head 1, the second discharge chamber 12 is designed to be parallel to the first discharge chamber 11, and the second discharge chamber 12 is close to the discharge port 13. In this case, the first discharge chamber 11 is set to be parallel to the second discharge chamber 12, and no interference will occur. The second discharge chamber 12 is closer to the discharge port 13, and is intended to control the coating of the coating 4 on both sides during the L-shaped coating process. This type of design is conducive to a more uniform distribution of the coating 4 during the coating process, thereby improving the uniformity and accuracy of the coating. At the same time, in view of the improvements made to the die head 1 of the existing coating device in this application, in the process of achieving L-shaped coating through a single coating die head 1, the coating amount of the two coating flow channels 210 must be controlled. Through the improvements implemented on the coating die head 1, the complex structure of multiple coating die heads 1 required in the prior art is avoided, and the phenomenon of belt breakage that may occur during the rolling process is further avoided, thereby improving production efficiency.

[0052] Furthermore, as a preferred embodiment of the present application, a dual-gap valve is installed on the basis of the above-mentioned coating device. By precisely controlling the valve, the two coating channels can be independently controlled, thereby achieving fine adjustment of the flow rate of the coating 4 in the independent channels. Specifically, its working principle is as follows: the dual-gap valve controls the flow rate of the coating 4 by adjusting two independent gaps. Each gap corresponds to a coating flow channel 210. By precisely controlling the size of the gap, the flow rate of the coating 4 in the coating flow channel 210 can be finely adjusted. This design enables the coating device to flexibly adjust the coating amount according to different coating requirements, thereby achieving higher coating accuracy and uniformity.

[0053] Specifically, the coating channel 210 includes a first channel 23 communicating with the first discharge chamber 11 and at least one second channel 24 communicating with the second discharge chamber 12. This design takes into account the fact that the existing L-shaped coating process requires subsequent cutting. If the coating channel 210 only includes the first channel 23 and the second channel 24, L-shaped coating can be directly performed, thus eliminating the need for subsequent cutting.

[0054] Implementation Method 2

[0055] like Figure 1-3As shown, the difference from embodiment 1 is that: in order to further improve the coating accuracy of the coating device of the present application for L-type coating, the gasket 2 is further composed of a first gasket 220 and a second gasket 230 stacked together, wherein the first flow channel 23 and the second flow channel 24 are both provided on the first gasket 220. The second gasket 230 is provided with a first feed port 21 and a second feed port 22, which are respectively connected to the first discharge chamber 11 and the second discharge chamber 12. This design not only ensures the smooth flow of the coating 4, but also facilitates the independent control of the coating 4 in different discharge chambers, thereby further improving the coating accuracy.

[0056] Specifically, the design of the separate gasket 2 enables independent control of the coating channel 210. The coating channel 210 on the first gasket 220 corresponds to the feed port on the second gasket 230, allowing the coating slurry 4 to enter both coating channels 210 separately. By precisely controlling the gap between the first gasket 220 and the second gasket 230, the flow rate of the coating 4 in the coating channel 210 can be finely adjusted. In addition, the feed port on the second gasket 230 is connected to the discharge chamber of the die head 1, ensuring a continuous supply of coating 4.

[0057] Furthermore, in the design of the coating channel 210, this embodiment also introduces a guide portion 231, which extends along the width direction of the gasket 2, helping to evenly distribute the coating 4 in the coating channel 210. In a specific embodiment, the outermost extension of the guide portion 231 is designed to have a specific curvature. Its design intention is to guide the coating 4 inside the channel to converge to a single position to prevent the coating 4 applied on the substrate 3 from being discontinuously distributed during the diversion process, thereby avoiding damage to the integrity of the L-shaped coating template. At the same time, the guide portion 231 includes a first guide body 2311 and a second guide body 2312 arranged at intervals along the length direction of the gasket 2, wherein the length of the first guide body 2311 is less than or equal to the length of the first channel 23, and the length of the second guide body 2312 is less than the length of the first guide body 2311. This design allows the coating 4 to be more evenly distributed in the coating channel 210, thereby improving the uniformity and accuracy of the coating.

[0058] Furthermore, to prevent interference between the coating 4 flowing between the coating channels 210, a barrier plate 25 is provided between adjacent coating channels 210. Furthermore, within the same coating channel 210, the first channel 23 and the second channel 24 are arranged along the length of the gasket 2. Two second channels 24 are provided, one on either side of the first channel 23. This design not only ensures the independence of the coating channels 210 but also makes the coating process more flexible, adapting to different coating requirements.

[0059] In summary, the new coating device in this embodiment can effectively improve the coating accuracy of L-type coating, reduce material loss, and meet the coating requirements for electrode materials in battery production.

[0060] Other details that are the same as those in Implementation 1 will not be described in detail in this implementation.

[0061] Implementation 3

[0062] like Figure 1-4 As shown, the difference from embodiment 1 is that: in order to further explain the specific details of the coating device in this application performing the L-type coating method, further, in the same coating flow channel 210, the first flow channel 23 and the second flow channel 24 are arranged along the length direction of the gasket 2, and two second flow channels 24 are provided, and are respectively located on both sides of the first flow channel 23. During the coating process, the discharge time and discharge amount of the first discharge cavity 11 and the second discharge cavity 12 designed corresponding to the first flow channel 23 and the second flow channel 24 are further controlled as shown in FIG. Figure 4 The L model shown has 4 coats of paint.

[0063] Specifically, the operating principle of the coating device is as follows: by shortening the discharge volume and discharge time of the second discharge chamber 12, the second flow channel 24 can intermittently coat the substrate 3, while the first discharge chamber 11 continuously coats, thereby forming an L-shaped coating 4 on the substrate 3. Furthermore, by precisely controlling the opening and timing of the two discharge chambers, the coating 4 can be evenly distributed within the coating flow channel 210, ensuring that the size and shape of the coating 4 applied to the substrate 3 meet the design requirements.

[0064] Furthermore, the first flow channel 23 and the second flow channel 24 are connected by a support protrusion 26. In a specific embodiment, the outermost extension of the support protrusion 26 is also designed with a certain curvature. Its purpose is to guide the coating material 4 to be evenly distributed within the coating flow channel 210, while preventing overflow and uneven coating of the coating material 4 during the coating process. The design of the support protrusion 26 not only improves the structural stability of the coating flow channel 210, but also ensures the smoothness and consistency of the coating material 4 on the coating substrate 3.

[0065] Other details that are the same as those in Implementation 1 will not be described in detail in this implementation.

[0066] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A coating device comprising a die head (1) and a gasket (2) clamped in the die head (1), characterized in that: The die head (1) comprises a discharge port (13) for discharging the coating (4), and a first discharge cavity (11) and a second discharge cavity (12) arranged at intervals. The gasket (2) is provided with at least one coating flow channel (210), the coating flow channel comprising a first flow channel (23) communicating with the first discharge cavity (11) and at least one second flow channel (24) communicating with the second discharge cavity (12); The gasket is formed by stacking a first gasket (220) and a second gasket (230); the first flow channel (23) and the second flow channel (24) are both provided on the first gasket (220); the second gasket (230) is provided with a first feed port (21) and a second feed port (22); the first flow channel (23) is communicated with the first discharge cavity (11) through the first feed port (21); and the second flow channel (24) is communicated with the second discharge cavity (12) through the second feed port (22).

2. The coating device according to claim 1, characterized in that: A flow guide portion (231) is provided in the coating flow channel (210), and the flow guide portion (231) extends along the width direction of the gasket.

3. The coating device according to claim 2, characterized in that: The flow guide portion (231) is provided in the first flow channel (23).

4. The coating device according to claim 3, characterized in that: The flow guide portion (231) comprises a first flow guide (2311) and a second flow guide (2312) arranged at intervals along the length direction of the gasket (2).

5. The coating device according to claim 4, characterized in that: The length of the first flow guide (2311) is less than or equal to the length of the first flow channel (23), and the length of the second flow guide (2312) is less than the length of the first flow guide (2311).

6. The coating device according to claim 1, characterized in that: A blocking plate (25) is provided between two adjacent coating flow channels (210).

7. The coating device according to claim 6, characterized in that: In the same coating flow channel (210), the first flow channel (23) and the second flow channel (24) are arranged along the length direction of the gasket (2), and two second flow channels (24) are provided, and are respectively located on both sides of the first flow channel (23).

8. The coating device according to claim 1, characterized in that: The first flow channel (23) and the second flow channel (24) are connected via a supporting protrusion (26).

9. The coating device according to claim 1, characterized in that: The second discharge cavity (12) is designed in parallel with the first discharge cavity (11), and the second discharge cavity (12) is close to the discharge port (13).

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