Multi-cavity extrusion coating head

Abstract

A multi-cavity extrusion coating head comprises a lower die head, the lower die head is provided with at least two slurry cavities for independent feeding, and the at least two slurry cavities are sequentially arranged in the length direction of the lower die head and isolated from each other; the upper die head is arranged on the lower die head and is connected with the lower die head; the gasket is arranged between the upper die head and the lower die head, and a coating outlet suitable for coating is formed at an opening of the upper die head and an opening of the lower die head; the upper die head comprises upper die branch heads of which the number is equal to that of the slurry cavities; the gasket comprises gasket sub-sheets with the same number as the slurry cavities; and each upper die sub-head corresponds to one gasket sub-sheet and is independently arranged on the lower die head where one slurry cavity is located, so that an independent coating sub-outlet is formed. The utility model has the advantage of convenience in maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling equipment in the lithium battery industry, in particular to a multi-cavity extrusion coating head. Background Art

[0002] In the production process of lithium-ion power batteries, the coating process is an important link in process design and production. The quality of the coating process plays a decisive role in the performance of the entire battery. Therefore, improving the coating efficiency and production yield is the most important part of the entire battery manufacturing. At present, high-speed coating and wide-width coating in the industry are the most significant process routes to improve coating production efficiency and reduce unit production costs.

[0003] Among them, it is crucial to ensure the consistency and stability of the slurry pressure in the die head cavity to achieve consistent and stable surface density. However, with the increase of the coating width, a longer cavity is required, and the consistency of the lateral pressure of the slurry in the cavity will become worse, and it is difficult to ensure the accuracy of the lateral surface density of the coating.

[0004] To solve the above problems, Chinese patent document CN 218486423 U discloses a coating die head, including a lower die head, the lower die head is provided with a main cavity having a first opening; an upper die head; a plurality of spacer blocks, the spacer blocks are connected in the main cavity and are adapted to divide the main cavity into a plurality of sequentially arranged chambers; a connecting rod; a gasket; a plurality of feed pipes, the number of the feed pipes corresponds to the number of multi-section chambers of the main cavity. The corresponding number of feed pipes and the number of multi-section chambers can slow down the slurry flow rate, reasonably improve the slurry medium flow rate distribution, and better improve the die head coating efficiency and coating surface density accuracy. By dividing the main cavity into multiple chambers through spacer blocks and flowing the slurry into the multiple chambers through multiple slurry inlet pipes, it is also possible to ensure the consistency and stability of the slurry pressure at each point in each section of the main cavity, and further improve the consistency and stability of the coating density.

[0005] Although this coating die head can improve the consistency and stability of the coating density, there is still a problem of difficult maintenance. Especially when one of the cavities has a problem, the whole machine must be disassembled for maintenance. Content of the Utility Model

[0006] The utility model provides a multi-cavity extrusion coating head that is convenient for maintenance.

[0007] The solution of the utility model is: to provide a multi-cavity extrusion coating head,

[0008] including a lower die head, at least two slurry cavities with independent feeding are provided on the lower die head, and at least two of the slurry cavities are arranged in sequence along the length direction of the lower die head and are isolated from each other;

[0009] an upper die head, which is arranged on the lower die head and is connected to the lower die head;

[0010] A gasket is disposed between the upper die head and the lower die head, and a coating outlet suitable for coating is formed at the openings of the upper die head and the lower die head;

[0011] The upper die head includes upper die sub-heads equal in number to the number of slurry chambers;

[0012] The gasket includes gasket sub-pieces equal in number to the number of slurry chambers;

[0013] Each upper die sub-head corresponds to a gasket sub-piece and is independently disposed on the lower die head where one of the slurry chambers is located to form an independent coating sub-outlet.

[0014] As an improvement to the present utility model, at least two of the slurry chambers are 2 - 10 in number.

[0015] As an improvement to the present utility model, each upper die sub-head is hingedly connected to the side of the lower die head away from the coating sub-outlet.

[0016] As an improvement to the present utility model, a rear positioning block is provided on the side of each upper die sub-head and the lower die head away from the coating sub-outlet.

[0017] As an improvement to the present utility model, side positioning blocks are provided between the first upper die sub-head and the last upper die sub-head and the sides of the lower die head.

[0018] As an improvement to the present utility model, an adjusting mechanism for adjusting the gap of the coating sub-outlet is provided on each upper die sub-head.

[0019] As an improvement to the present utility model, glue dispensing channels are provided on both sides of each slurry chamber.

[0020] As an improvement to the present utility model, glue passing ports are provided on both sides of each gasket sub-piece corresponding to the glue dispensing channels, and edge glue feeding ports are provided on the upper die sub-head relative to the glue passing ports.

[0021] As an improvement to the present utility model, exhaust holes are provided on each upper die sub-head.

[0022] Since the present utility model adopts the structure that the upper die head includes upper die sub-heads equal in number to the number of slurry chambers; the gasket includes gasket sub-pieces equal in number to the number of slurry chambers; each upper die sub-head corresponds to a gasket sub-piece and is independently disposed on the lower die head where one of the slurry chambers is located to form an independent coating sub-outlet, when a problem occurs in a certain flow channel, only the corresponding upper die sub-head and gasket sub-piece need to be removed for repair, instead of removing the entire upper die head like a traditional coating head for repair. Therefore, the present utility model has the advantage of convenient repair. Brief Description of the Drawings

[0023] Figure 1 is a schematic perspective view of an embodiment of the present utility model.

[0024] Figure 2 is Figure 1 a schematic rear view of the shown embodiment.

[0025] Figure 3 is Figure 2 a schematic cross-sectional view taken along the line A-A in

[0026] Figure 4 is Figure 1 a schematic top plan view of the lower die head in

[0027] Figure 5 is Figure 1 a schematic plan view of the gasket in Detailed Description of the Embodiments

[0028] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0029] As Figures 1 to 5 shown, Figures 1 to 5 discloses a multi-cavity extrusion coating head,

[0030] including a lower die head 1, on which there are provided at least two slurry cavities 11 for independent feeding (in this embodiment, the number of the slurry cavities 11 is 5. Of course, the number of the slurry cavities 11 can be selected between 2 and 10 according to needs), and at least two of the slurry cavities 11 are arranged in sequence along the length direction of the lower die head 1 and are isolated from each other;

[0031] an upper die head 2, which is arranged on the lower die head 1 and is connected to the lower die head 1 through fasteners;

[0032] a gasket 3, which is arranged between the upper die head 2 and the lower die head 1 and forms a coating outlet 4 suitable for coating at the openings of the upper die head 2 and the lower die head 1;

[0033] The upper die head 2 includes upper die sub-heads 21 equal in number to the slurry cavities 11 (in this embodiment, the number of the upper die sub-heads 21 is 5. Of course, the number of the upper die sub-heads 21 can be selected between 2 and 10 according to needs). Each of the slurry cavities 11 corresponds to a feed pipe 13 to achieve separate feeding, which can ensure the discharge pressure of each of the slurry cavities 11 and make the coating more uniform and accurate;

[0034] The gasket 3 includes gasket segments 31 equal in number to the number of the slurry chambers 11 (in this embodiment, the number of the gasket segments 31 is 5. Of course, the number of the gasket segments 31 can be selected between 2 and 10 as required);

[0035] Each upper die head 21 corresponds to a gasket segment 31 and is independently arranged on the lower die head 1 where one of the slurry chambers 11 is located to form an independent coating outlet.

[0036] Since the utility model adopts the structure that each upper die head 21 corresponds to a gasket segment 31 and is independently arranged on the lower die head 2 where one of the slurry chambers 11 is located to form an independent coating outlet, when coating problems occur in a certain flow channel, only the corresponding upper die head 21 and gasket segment 31 need to be removed for repair, instead of removing the entire upper die head as required by the traditional coating head. Therefore, the utility model has the advantage of convenient repair.

[0037] Preferably, each upper die head 21 and the side of the lower die head 1 away from the coating outlet are connected by a hinge 5. When the corresponding upper die head 21 or / and gasket segment 31 need to be repaired, the fastener connecting the two can be removed, and then the upper die head 21 can be turned over for repair without removing the upper die head 21. In this way, the repair is more convenient.

[0038] Preferably, a rear positioning block 6 is provided on each upper die head 21 and the side of the lower die head 1 away from the coating outlet to ensure that the rear sides of the upper die head 21 and the lower die head 1 are in the same plane.

[0039] Preferably, side positioning blocks 7 are provided between the first upper die head and the last upper die head and the side of the lower die head 1 to ensure that the sides of the upper die head 21 and the lower die head 1 are in the same plane.

[0040] Preferably, an adjusting mechanism 8 for adjusting the gap of the coating outlet is provided on each upper die head 21. The adjusting mechanism 8 is a prior art and will not be elaborated here.

[0041] Preferably, dispensing channels 12 are provided on both sides of each slurry chamber 11.

[0042] Preferably, glue passing openings 32 are provided on both sides of each gasket segment 31 corresponding to the dispensing channels 12. An edge dispensing feed port 211 is provided on the upper die head 21 relative to the glue passing openings 32. The glue entering from the edge dispensing feed port 211 flows into the dispensing channels 12 through the glue passing openings 32 and is then coated on the substrate through the dispensing channels 12.

[0043] Preferably, each of the upper die heads 21 is provided with an exhaust hole 212 for exhausting the gas in the slurry.

[0044] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Obviously, those skilled in the art can make various changes and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-cavity extrusion coating head, The invention comprises a lower die head (1), wherein the lower die head (1) is provided with at least two slurry chambers (11) for independent feeding, and the at least two slurry chambers (11) are arranged in sequence along the length direction of the lower die head (1) and are isolated from each other; An upper die head (2) is disposed on the lower die head (1) and connected to the lower die head (1); A gasket (3) is arranged between the upper die head (2) and the lower die head (1), and forms a coating outlet (4) suitable for coating at the opening of the upper die head (2) and the lower die head (1); characterized in that: The upper die head (2) comprises upper die sub-heads (21) whose number is equal to the slurry cavities (11); The gasket (3) comprises gasket segments (31) whose number is equal to the slurry chambers (11); Each of the upper die sub-heads (21) corresponds to a gasket sub-head (31) and is independently arranged on a lower die head (1) where the slurry cavity (11) is located to form an independent coating outlet.

2. The multi-cavity extrusion coating head according to claim 1, characterized in that : The number of at least two slurry chambers (11) is 2-10.

3. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that Each of the upper die heads (21) is connected to the side of the lower die head (1) away from the coating outlet via a hinge (5).

4. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that : A rear positioning block (6) is provided on a side of each of the upper die head (21) and the lower die head (1) away from the coating outlet.

5. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that A side positioning block (7) is provided between the first upper die branch and the last upper die branch and the side surface of the lower die head (1).

6. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that : An adjustment mechanism (8) for adjusting the gap of the coating outlet is provided on each of the upper mold sub-heads (21).

7. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that : Glue dispensing channels (12) are provided on both sides of each slurry cavity (11).

8. The multi-cavity extrusion coating head according to claim 7, characterized in that : On both sides of each gasket segment (31), a glue outlet (32) is provided corresponding to the glue dispensing flow channel (12), and an edge glue dispensing feed port (211) is provided on the upper mold segment (21) relative to the glue outlet (32).

9. The multi-cavity extrusion coating head according to claim 1 or 2, characterized in that : An exhaust hole (212) is provided on each of the upper mold heads (21).

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