Prime coating machine head mechanism and coating equipment

Abstract

The invention discloses a prime coating machine head mechanism and coating equipment, and relates to the technical field of battery manufacturing, and the prime coating machine head mechanism comprises a mechanism main body, a first surface prime coating assembly and a second surface prime coating assembly. The first surface prime coat assembly and the second surface prime coat assembly are respectively mounted on the mechanism main body, and a prime coat roller can be in reverse rotation contact with two surfaces of a base material to form an adjustable wrap angle. And a coating feeding area for a base material to vertically pass through is formed between the two assemblies. The design has the following advantages: 1, double-sided simultaneous prime coat is realized, the production efficiency is improved or the equipment space occupation is reduced, the base material does not need to be transferred, and the production line transformation is facilitated; 2, the prime coating roller is in reverse rotation contact with the base material, prime coating can be completed without a back pressure rubber roller, the thickness of the prime coating can be adjusted by adjusting the wrap angle and the reverse rotation speed, and the coating quality and the process adjustability are improved; 3, the vertical arrangement saves the workshop length and effectively compresses the transverse space;

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing, and particularly to an undercoat head mechanism and a coating device. Background Art

[0002] In the field of modern battery coating machines, coating technology is one of the core links in battery electrode production. During the positive electrode coating process, it is usually necessary to pre-apply a layer of carbon powder on the substrate to ensure the electrical conductivity and structural stability of the electrode.

[0003] Traditional coating methods mainly rely on single-sided horizontal gravure coating technology. However, a single-sided coater can only process one surface at a time, resulting in the need to wait for the first surface to dry and be wound up before the second surface can be coated. This not only reduces production efficiency but also increases the complexity of material transfer and the space occupied by the equipment.

[0004] Furthermore, in the existing single-sided horizontal gravure coating, the slurry needs to be transferred between the substrate and the undercoat roll under the action of a back pressure rubber roll, which makes it easy for the substrate to have defects such as indentations and wrinkles, and the coating quality is affected by the contact joint line of the two rolls; moreover, it is also difficult to adjust the undercoat thickness.

[0005] The above problems are particularly prominent in large-scale production, restricting the production capacity and cost-effectiveness of battery manufacturing.

[0006] Therefore, there is an urgent need for a solution to solve the above problems. Summary of the Invention

[0007] In view of this, the purpose of this application is to provide an undercoat head mechanism and a coating device to solve the problems of efficiency and equipment space occupation existing in the existing single-sided coater, and further to solve the technical problems that restrict the production capacity and cost-effectiveness of battery manufacturing.

[0008] To achieve the above technical purpose, this application provides an undercoat head mechanism, including a mechanism main body, a first-side undercoat component, and a second-side undercoat component;

[0009] The first-side undercoat component is installed on the mechanism main body, and its undercoat roll can rotate in the opposite direction and contact the first surface of the substrate to form an adjustable wrap angle;

[0010] The second-side undercoat component is installed on the mechanism main body, and its undercoat roll can rotate in the opposite direction and contact the second surface of the substrate to form an adjustable wrap angle;

[0011] A coating feeding area for the vertical passage of the substrate is formed between the first undercoat component and the second undercoat component.

[0012] Further, both the first-side undercoat component and the second-side undercoat component include a material box, an undercoat roll, and a squeegee;

[0013] The material box stores coating slurry, and one side of the material box is provided with an opening;

[0014] Part of the primer roller extends into the material box through the opening and contacts the coating slurry in the material box;

[0015] The scraper is installed on the opening and is used to scrape the excess coating slurry on the primer roller back into the material box;

[0016] The scraper is also used to close the gap between the opening and the primer roller;

[0017] The primer roller contacts the substrate and forms an adjustable wrap angle.

[0018] Further, the first-side primer assembly and the second-side primer assembly are staggered in the vertical direction.

[0019] Further, it further includes two primer driving modules;

[0020] The first primer assembly and the second primer assembly are respectively connected to one of the primer driving modules and can move closer to or away from the substrate under the drive of the primer driving module.

[0021] Further, it further includes a primer driving module, a guiding roller, and a guiding driving module;

[0022] The guiding roller, the first-side primer assembly, and the second-side primer assembly are arranged in sequence from bottom to top;

[0023] The first-side primer assembly or the second-side primer assembly is connected to the primer driving module and can move closer to or away from the substrate under the drive of the primer driving module;

[0024] The guiding roller is connected to the guiding driving module and can move closer to or away from the substrate under the drive of the guiding driving module.

[0025] Further, it further includes a traction assembly, which is installed on the mechanism main body and is used to traction the substrate.

[0026] This application also discloses a coating device, which includes an unwinding mechanism, a corona mechanism, the primer head mechanism described above, a primer oven, and a coating mechanism;

[0027] The unwinding mechanism, the corona mechanism, the primer head mechanism, the primer oven, and the coating mechanism are arranged in sequence.

[0028] Further, the primer oven is arranged directly above the primer head mechanism and is used to dry the substrate conveyed vertically.

[0029] As can be seen from the above technical solutions, the designed primer head mechanism of the present application has the following beneficial effects:

[0030] 1. The first primer coating assembly and the second primer coating assembly achieve double-sided simultaneous primer coating. The production efficiency of the equipment can be doubled or the occupied space of the equipment can be reduced by half. At the same time, the substrate does not need to be transferred, which is convenient for transformation on the basis of the original coating production line and does not affect the operation and use of the original equipment on the production line.

[0031] 2. The primer coating rollers of the first primer coating assembly and the second primer coating assembly are in reverse rotational contact with the substrate and form an adjustable wrap angle. Primer coating can be completed without a back pressure rubber roller. Moreover, by adjusting the wrap angle and the reverse rotation speed, the primer coating thickness can be adjusted. Not only is the coating quality high, but it is also easy to adjust the primer coating thickness, and the process has better adjustability.

[0032] 3. The first primer coating assembly and the second primer coating assembly are arranged vertically to realize the vertical movement of the substrate and perform double-sided coating, effectively compressing the space used horizontally and saving the occupied workshop length. Description of the Drawings

[0033] 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 drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the single-sided horizontal gravure coating mechanism provided in the present application;

[0035] Figure 2 It is a schematic structural diagram of a primer head mechanism in a primer coating state provided in the present application;

[0036] Figure 3 It is a schematic structural diagram of a primer head mechanism in a non-primer coating state provided in the present application;

[0037] Figure 4 It is a schematic structural diagram of a coating equipment provided in the present application;

[0038] Figure 2-4 In the figure: 1. Substrate; 2. Unwinding mechanism; 3. Corona mechanism; 4. Primer head mechanism; 5. Primer coating oven; 6. Coating mechanism; 7. First-layer platform; 8. Second-layer platform; 10. Mechanism main body; 11. First-side primer coating assembly; 12. Second-side primer coating assembly; 13. Guide roller; 14. Traction assembly; 15. Primer coating roller; 16. Material box. Detailed Embodiments

[0039] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the embodiments of the present application.

[0040] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0041] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a replaceable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside 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 specific situations.

[0042] The applicant has found through research that the existing single-sided horizontal gravure coating mechanism 6 is as Figure 1 shown. The open trough 400 is horizontally arranged. The excess slurry on the gravure roll 300 is scraped off by the doctor blade 500, and the slurry is transferred to the substrate 1100 under the pressing action of the back pressure rubber roll 200. The excess slurry falls back into the trough 400 under the action of its own gravity.

[0043] The above design has the following deficiencies:

[0044] 1. Since it is an open trough, the slurry will inevitably splash out.

[0045] 2. Since the substrate 1 is pressed between the back pressure rubber roll and the gravure roll, the substrate 1 is prone to defects such as indentations and wrinkles, and the coating quality is affected by the contact joint line of the two rolls. At the same time, it is difficult to adjust the coating thickness.

[0046] 3. It can only be coated on one side. The second side can only repeat the coating process after the first side is coated and dried. The substrate 1 needs to be wound up and transported. This causes problems such as low production efficiency, inconvenient material transportation, and large equipment occupation space.

[0047] To solve at least some of the above technical problems, an embodiment of the present application discloses a primer head mechanism and a coating device.

[0048] Please refer to Figure 2 , an embodiment of a primer head mechanism and a coating device provided in an embodiment of the present application includes:

[0049] A mechanism main body 10, a first side primer assembly 11, and a second side primer assembly 12.

[0050] The first side primer assembly 11 is installed on the mechanism main body 10, and its primer roller 15 can reversely rotate and contact the first side of the substrate 1 to form an adjustable wrap angle; specifically, the first side primer assembly 11 is installed on the mechanism main body 10. The primer roller 15 of this assembly can reversely rotate and contact the first side of the substrate 1, that is, the rotation direction of the primer roller 15 is opposite to the moving direction of the substrate 1, so that the material can be evenly coated on the first side of the substrate 1. At the same time, the wrap angle formed by this contact is adjustable. The wrap angle refers to the angle between the line connecting a certain point on the primer roller 15 and the contact point of the substrate 1 to the axis of the primer roller 15 when the primer roller 15 contacts the substrate 1. Adjusting the wrap angle can change the coating amount and uniformity of the coating.

[0051] The second side primer assembly 12 is installed on the mechanism main body 10, and its primer roller 15 can reversely rotate and contact the second side of the substrate 1 to form an adjustable wrap angle. Specifically, the second side primer assembly 12 can reversely rotate and contact the second side of the substrate 1, and can also form an adjustable wrap angle. The function of this assembly is similar to that of the first side primer assembly 11, except that it operates on the other side of the substrate 1, and will not be elaborated here.

[0052] A coating feeding area for the vertical passage of the substrate 1 is formed between the first primer assembly and the second primer assembly.

[0053] The primer head mechanism designed in the present application has the following remarkable beneficial effects:

[0054] 1. Through the collaborative work of the first primer assembly and the second primer assembly, double-sided simultaneous priming of the substrate 1 is achieved. This design not only doubles the production efficiency of the equipment, but also significantly reduces the space occupied by the equipment. At the same time, since the substrate 1 does not need to be transferred, it can be conveniently modified on the original coating production line without affecting the normal operation and use of the original equipment on the production line.

[0055] 2. In this design, the primer rollers 15 of the first primer coating assembly and the second primer coating assembly are in reverse rotational contact with the substrate 1, and can form an adjustable wrap angle. This design enables the primer coating work to be completed without an additional back pressure rubber roller. In addition, by adjusting the size of the wrap angle and the reverse rotation speed, the thickness of the primer coating can be easily controlled. This design not only ensures a high standard of coating quality, but also makes it easier to adjust the thickness of the primer coating, thereby providing better process adjustability.

[0056] 3. The design of this primer coating head mechanism also adopts a vertical arrangement of the first primer coating assembly and the second primer coating assembly, which enables the substrate 1 to move vertically and enables coating on both sides of the substrate 1. This design effectively compresses the space required horizontally, thereby saving the workshop length and making the space occupied by the equipment more compact.

[0057] The above is the first embodiment of a primer coating head mechanism provided by this application. The following is the second embodiment of a primer coating head mechanism provided by this application. For details, please refer to Figures 2 to 3 。

[0058] Based on the solution of the above first embodiment:

[0059] Furthermore, both the first surface primer coating assembly 11 and the second surface primer coating assembly 12 include a material box 16, a primer roller 15, and a doctor blade (not shown in the figure); among them, the primer roller 15 is a micro-concave coating roller.

[0060] The material box 16 stores coating slurry, and one side of the material box 16 is provided with an opening; a part of the primer roller 15 extends into the material box 16 through the opening and contacts the coating slurry in the material box 16; the doctor blade is installed on the opening and is used to scrape off the excess coating slurry on the primer roller 15 back into the material box 16 (which helps to ensure the uniform distribution of the coating slurry on the primer roller 15 and further improves the coating quality); the doctor blade is also used to close the gap between the opening and the primer roller 15 to achieve a closed design, effectively solving the problem of slurry splashing existing in the traditional open trough design.

[0061] The primer roller 15 contacts the substrate 1 and forms an adjustable wrap angle. The means for adjusting the wrap angle include but are not limited to the following:

[0062] I. Adjust the position of the primer roller 15

[0063] By adjusting the relative position between the primer roller 15 and the substrate 1, the contact point between the primer roller 15 and the substrate 1 can be changed, thereby achieving the adjustment of the wrap angle. This can usually be done through mechanical devices or manual operations.

[0064] II. Adopt an adjustable support structure

[0065] To more precisely control the size of the wrap angle, adjustable support structures can be provided on one or both sides of the primer roller 15. These support structures can be lifted or tilted as needed, thereby changing the contact angle between the primer roller 15 and the substrate 1 and the size of the wrap angle.

[0066] In practical applications, it is necessary to select appropriate adjustment means according to specific requirements and equipment conditions to achieve the best wrap angle adjustment effect.

[0067] Furthermore, the first-side primer assembly 11 and the second-side primer assembly 12 are staggered in the vertical direction.

[0068] This staggered distribution design makes the structure of the primer head mechanism more compact, further saving space. At the same time, since the first-side primer assembly 11 and the second-side primer assembly 12 are respectively used for coating the two sides of the substrate 1, this staggered distribution method will not affect the coating effect. In practical applications, the positions and angles of the first-side primer assembly 11 and the second-side primer assembly 12 can be flexibly adjusted according to the specific layout of the production line and equipment conditions to achieve the best coating effect and production efficiency.

[0069] Furthermore, it also includes two primer driving modules; the first primer assembly and the second primer assembly are respectively connected to a primer driving module, and can move closer to or away from the substrate 1 under the drive of the primer driving module. Specifically, the primer driving module can be a displacement driving module such as a cylinder, which is specifically connected to the primer roller 15 to drive the primer roller 15 to extend (close to the substrate 1) / retract (away from the substrate 1) for movement.

[0070] This design can enable the first primer assembly and the second primer assembly to move closer to the substrate 1 to respectively contact the first side and the second side of the substrate 1, realizing the primer coating state as Figure 2 shown; it can also enable the first primer assembly and the second primer assembly to move away from the substrate 1, realizing the non-primer coating state (not contacting the substrate 1 and not affecting the operation and use of other equipment on the overall production line) as Figure 3 shown.

[0071] Furthermore, it can also include a primer driving module, a guide roller 13, and a guide driving module (not shown in the figure); the guide roller 13, the first-side primer assembly 11, and the second-side primer assembly 12 are arranged in sequence from bottom to top; the first-side primer assembly 11 or the second-side primer assembly 12 is connected to the primer driving module and can move closer to or away from the substrate 1 under the drive of the primer driving module; the guide roller 13 is connected to the guide driving module and can move closer to or away from the substrate 1 under the drive of the guide driving module.

[0072] Under this design, the guiding roller 13 and the guiding drive module are used to replace the other primer coating drive module, and the free switching between the primer coating state and the non-primer coating state can also be realized. Those skilled in the art can make changes according to actual needs without limitation.

[0073] Further, it further includes a traction assembly 14, which is installed on the mechanism main body 10 and is used to traction the substrate 1.

[0074] The design of the traction assembly 14 ensures the stable operation of the substrate 1 during the coating process. The substrate 1 is tractioned from one end to the other end, so that it passes through the primer coating head mechanism for coating. The speed and tension of the traction assembly 14 can be adjusted according to the requirements of the coating process to ensure that the substrate 1 remains flat and stable during the coating process, thereby improving the coating quality.

[0075] As Figure 4 shown, the present application also discloses a coating device, which includes an unwinding mechanism 2, a corona mechanism 3, a primer coating head mechanism 4, a primer coating oven 5 and a coating mechanism 6; the unwinding mechanism 2, the corona mechanism 3, the primer coating head mechanism, the primer coating oven 5 and the coating mechanism 6 are arranged in sequence.

[0076] Specifically, the substrate 1 is unwound from the unwinding mechanism 2, then enters the corona mechanism 3 for corona treatment, then enters the primer coating head mechanism 4 and turns to move vertically upward for two-sided primer coating, then enters the primer coating oven 5 for drying, and after drying, enters the subsequent coating mechanism 6 for coating.

[0077] Further, the primer coating oven 5 is arranged directly above the primer coating head mechanism 4 and is used to dry the vertically conveyed substrate 1. Both the primer coating head mechanism 4 and the primer coating oven 5 adopt a vertical tape-running design, which greatly saves the workshop length occupied by the equipment.

[0078] During specific layout, the unwinding mechanism 2, the corona mechanism 3 and the primer coating head mechanism 4 can be arranged on a first-layer platform 7, while the primer coating oven 5 and the coating mechanism 6 can be arranged on a second-layer platform 8.

[0079] The above has introduced in detail a primer coating head mechanism and a coating device provided by the present application. For those of ordinary skill in the art, according to the idea of the embodiments of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A primer head mechanism, characterized in that: It comprises a mechanism body (10), a first-side primer component (11) and a second-side primer component (12); The first-side primer assembly (11) is mounted on the mechanism body (10), and its primer roller (15) is capable of rotating in the opposite direction to contact the first side of the substrate (1) and forming an adjustable wrap angle; The second surface primer assembly (12) is mounted on the mechanism body (10), and its primer roller (15) is capable of rotating in the opposite direction to contact the second surface of the substrate (1) and forming an adjustable wrap angle; A coating feeding area is formed between the first primer component and the second primer component for the substrate (1) to pass vertically.

2. The primer head mechanism according to claim 1, characterized in that: The first surface primer assembly (11) and the second surface primer assembly (12) both comprise a material box (16), a primer roller (15) and a scraper; The material box (16) stores coating slurry, and one side of the material box (16) is provided with an opening; A portion of the primer roller (15) extends into the material box (16) through the opening and contacts the coating slurry in the material box (16); The scraper is mounted on the opening and is used to scrape excess coating slurry on the primer roller (15) back to the material box (16); The scraper is also used to close the gap between the opening and the primer roller (15); The primer roller (15) contacts the substrate (1) and forms an adjustable wrap angle.

3. The primer head mechanism according to claim 1, characterized in that: The first surface primer assembly (11) and the second surface primer assembly (12) are staggered in the vertical direction.

4. The primer head mechanism according to claim 3, characterized in that: Also included are two primer drive modules; The first primer component and the second primer component are respectively connected to a primer drive module and can move closer to or away from the substrate (1) under the drive of the primer drive module.

5. The primer head mechanism according to claim 3, characterized in that: It also includes a primer drive module, a guide roller (13) and a guide drive module; The guide roller (13), the first surface primer assembly (11), and the second surface primer assembly (12) are arranged in sequence from bottom to top; The first-side primer component (11) or the second-side primer component (12) is connected to the primer drive module and can move closer to or farther from the substrate (1) under the drive of the primer drive module; The guide roller (13) is connected to the guide drive module and can move closer to or away from the substrate (1) under the drive of the guide drive module.

6. The primer head mechanism according to claim 1, characterized in that: It also includes a traction component (14), which is installed on the mechanism body (10) and is used to traction the substrate (1).

7. Coating equipment, characterized in that It comprises an unwinding mechanism (2), a corona mechanism (3), a primer head mechanism (4) according to any one of claims 1 to 6, a primer oven (5) and a coating mechanism (6); The unwinding mechanism (2), the corona mechanism (3), the primer head mechanism (4), the primer oven (5), and the coating mechanism (6) are arranged in sequence.

8. The coating device according to claim 7, characterized in that: The primer oven (5) is arranged directly above the primer head mechanism (4) and is used to dry the vertically transported substrate (1).

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