CN215784502U

CN215784502U - Coating die head capable of adjusting coating uniformity

Info

Publication number: CN215784502U
Application number: CN202121154805.3U
Authority: CN
Inventors: 许玉山; 彭建林
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-02-11
Anticipated expiration: 2031-05-26

Abstract

The utility model relates to the technical field of coating, in particular to a coating die head for adjusting coating uniformity, which comprises a body, wherein the body is provided with a coating slit and a feeding channel, a shunting cavity and a pressure equalizing cavity are arranged in the body, the shunting cavity is communicated with the feeding channel, the pressure equalizing cavity is communicated with the coating slit, a gasket assembly is arranged in the body, and a grid for communicating the shunting cavity and the pressure equalizing cavity is arranged on the gasket assembly. The spacer component is provided with grids for communicating the shunt cavity and the pressure equalizing cavity, and the feeding amount from the shunt cavity to different positions of the pressure equalizing cavity can be adjusted by adjusting the width, the number and the distribution of the grids, so that the distribution uniformity of the wet film can be transversely adjusted. Under the condition of not changing the structure of the die head body, the adaptability and the range of the die head to the coating liquid are expanded through the arranged gasket assembly. Meanwhile, by adopting the coating die head structure, the redistribution of the slurry in the die head cavity is realized, and the coating die head structure has obvious advantages compared with a multi-inlet die head.

Description

Coating die head capable of adjusting coating uniformity

Technical Field

The utility model relates to the technical field of coating, in particular to a coating die head for adjusting coating uniformity.

Background

In the industrial production of lithium batteries, die extrusion coating is widely applied due to the advantages of high precision, wide coating window, high reliability and the like. However, in actual production, the coating liquid is more in kind and the coating liquid is different in configuration, so that the coating liquid is likely to be mismatched with the cavity of the extrusion die.

In order to increase the adaptability and the adjusting capability of the coating die head to different coating liquids, the utility model adjusts the distribution of the coating liquid in the die head cavity by matching the gasket and the double cavities from the perspective of combining the gasket, thereby playing the role of expanding the adaptability of the coating liquid.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coating die head for adjusting coating uniformity so as to solve the technical problem of poor adaptability of a coating liquid in the prior art.

In order to achieve the purpose, the technical scheme adopted by the utility model is to provide a coating die head for adjusting coating uniformity, which comprises a body, wherein the body is provided with a coating slit and a feeding channel, a shunting cavity and a pressure equalizing cavity are arranged in the body, the shunting cavity is communicated with the feeding channel, the pressure equalizing cavity is communicated with the coating slit, a gasket component is arranged in the body, and a grid for communicating the shunting cavity and the pressure equalizing cavity is arranged on the gasket component.

Further, the body includes mould and lower mould, the gasket subassembly includes female gasket and sub-gasket, go up the mould with pass through between the lower mould female gasket is formed with the coating slit, sub-gasket sets up female gasket one side, be equipped with on the sub-gasket the grid.

Further, the female gasket comprises a fixed plate, a first side plate and a second side plate, the first side plate and the second side plate are respectively arranged at two ends of the fixed plate, the lower die is close to the lip edge, the upper die is close to the lip edge, the first side plate and a gap between the second side plates form the coating slit, and the sub-gasket is detachably arranged between the first side plate and the second side plate.

Further, the reposition of redundant personnel cavity is followed the length direction setting of body, the sub-gasket is located the discharge end of reposition of redundant personnel cavity, the quantity of grid is a plurality of and follows the length direction setting of sub-gasket, the width of grid is followed the centre of sub-gasket to both ends grow gradually.

Furthermore, the shunting cavity and the pressure equalizing cavity are both arranged at the top end of the lower die, and the shunting cavity and the pressure equalizing cavity are arranged in parallel.

Furthermore, the feeding channel is arranged at the central part of one side of the lower die and communicated with the lowest end of the flow dividing cavity.

Furthermore, the gasket assembly is provided with a connecting piece extending out of the body.

Further, the coating slit is disposed opposite to the feed passage.

The utility model has the beneficial effects that:

1. the spacer component is provided with grids for communicating the shunt cavity and the pressure equalizing cavity, and the feeding amount from the shunt cavity to different positions of the pressure equalizing cavity can be adjusted by adjusting the width, the number and the distribution of the grids, so that the distribution uniformity of the wet film can be transversely adjusted. Under the condition of not changing the structure of the die head body, the adaptability and the range of the die head to the coating liquid are expanded through the arranged gasket assembly. Meanwhile, by adopting the coating die head structure, the redistribution of the slurry in the die head cavity is realized, and the coating die head structure has obvious advantages compared with a multi-inlet die head.

2. The gasket subassembly includes female gasket and sub-gasket, and the female gasket adopts traditional gasket structure for go up and be formed with the coating slit between mould and the lower mould, and the sub-gasket sets up in female gasket one side for set up the grid.

3. The sub-gasket is detachably arranged between the first side plate and the second side plate. The sub-gaskets are nested inside the mother gasket, the adaptability of the die head cavity can be adjusted by replacing and adjusting different sub-gaskets according to different slurry or coating processes, the whole gasket assembly does not need to be replaced, and the production cost is saved.

4. During coating, due to the distribution of cavity pressure, the coating is distributed in a manner that the middle is thick and the two sides are thin. The quantity of grid is a plurality of and sets up along the length direction of sub-gasket, and the width of grid is from the middle of sub-gasket to both ends grow gradually, and the problem that thick both sides are thin in the middle of the coating has been solved to foretell structure setting.

5. The feed channel is communicated with the lowest end of the shunting cavity, and gradually feeds from the bottom end of the shunting cavity, so that air in the flow distribution cavity is discharged, and the coating quality is prevented from being influenced by bubbles generated in the coating process.

6. When different types of slurries are used, the subgaskets need to be replaced in order to ensure uniformity of the areal density of the coating. The connecting piece extending out of the body is arranged on one side of the gasket assembly, and the gasket assembly can be conveniently taken down to be replaced by clamping or grabbing the connecting piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of a coating die for adjusting coating uniformity according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a coating die for adjusting coating uniformity provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the position of a shim assembly used in a coating die for adjusting coating uniformity according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an overall structure of a gasket assembly used in a coating die for adjusting coating uniformity according to an embodiment of the present invention.

Description of reference numerals:

1. an upper die; 2. a lower die; 21. a feed channel; 22. a flow dividing cavity; 23. a pressure equalizing cavity; 3. a gasket assembly; 31. a female gasket; 311. a fixing plate; 312. a first side plate; 313. a second side plate; 32. a sub-gasket; 321. a grid; 33. a connecting member; 4. coating the slit.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 4, a connecting member 33 shown in fig. 1 to 4 is a coating die head for adjusting coating uniformity provided in an embodiment of the present invention, and includes a body, the body includes a coating slit 4 and a feeding channel 21, a flow dividing cavity 22 and a pressure equalizing cavity 23 are provided in the body, the flow dividing cavity 22 is communicated with the feeding channel 21, the pressure equalizing cavity 23 is communicated with the coating slit 4, a gasket assembly 3 is provided in the body, and a grid 321 for communicating the flow dividing cavity 22 with the pressure equalizing cavity 23 is provided on the gasket assembly 3. The spacer component 3 is provided with grids 321 which are communicated with the shunt cavity 22 and the pressure equalizing cavity 23, and the feeding amount from the shunt cavity 22 to different positions of the pressure equalizing cavity 23 can be adjusted by adjusting the width, the number and the distribution of the grids 321, so that the distribution uniformity of the wet film can be transversely adjusted. Under the condition of not changing the structure of the die head body, the adaptability and the range of the die head to the coating liquid are expanded through the arranged gasket assembly 3. Meanwhile, by adopting the coating die head structure, the redistribution of the slurry in the die head cavity is realized, and the coating die head structure has obvious advantages compared with a multi-inlet die head.

Specifically, the body includes mould 1 and lower mould 2, and gasket subassembly 3 includes female gasket 31 and sub-gasket 32, goes up and is formed with coating slit 4 through female gasket 31 between mould 1 and the lower mould 2, and sub-gasket 32 sets up in female gasket 31 one side, is equipped with grid 321 on the sub-gasket 32. The female gasket 31 comprises a fixing plate 311 and a first side plate 312 and a second side plate 313 which are respectively arranged at two ends of the fixing plate 311, a coating slit 4 is formed by the lower die 2 close to the lip edge and the upper die 1 close to the lip edge and the gap between the first side plate 312 and the second side plate 313, and the sub-gasket 32 is detachably arranged between the first side plate 312 and the second side plate 313. The mother pad 31 has a conventional pad structure for forming the coating slit 4 between the upper and lower dies 1 and 2, and the sub-pad 32 is disposed at one side of the mother pad 31 for disposing the grid 321. The sub-gaskets 32 are nested in the female gasket 31, the adaptability of the die cavity can be adjusted by changing and adjusting different sub-gaskets 32 according to different slurry or coating processes, the whole gasket assembly 3 does not need to be changed, and the production cost is saved.

Further, the shunt cavity 22 is arranged along the length direction of the body, the sub-gasket 32 is located at the discharge end of the shunt cavity 22, the number of the grids 321 is several, and the grids 321 are arranged along the length direction of the sub-gasket 32, and the width of the grids 321 is gradually increased from the middle to the two ends of the sub-gasket 32. During coating, due to the distribution of cavity pressure, the coating is distributed in a manner that the middle is thick and the two sides are thin. The number of the grids 321 is several, and the grids 321 are arranged along the length direction of the sub-gasket 32, the width of the grids 321 is gradually increased from the middle to two ends of the sub-gasket 32, and the structural arrangement solves the problem that the coating is thick in the middle and thin on two sides. Of course, the distribution of the grids 321 of the sub-gasket 32 needs to be adjusted to match the actual coating conditions.

Further, the shunting cavity 22 and the pressure equalizing cavity 23 are both arranged at the top end of the lower die 2, and the shunting cavity 22 and the pressure equalizing cavity 23 are arranged in parallel.

Specifically, feedstock channel 21 sets up the central part in lower mould 2 one side, and reposition of redundant personnel cavity 22 sets up on the top of lower mould 2 and along length direction, can flow respectively to reposition of redundant personnel cavity 22's both ends after feedstock channel 21 feeds, and then is favorable to the even ejection of compact of coating slit 4. The feed channel 21 communicates with the lowermost end of the flow dividing chamber 22. The materials are gradually fed from the bottom end of the flow distribution cavity 22, the air in the flow distribution cavity is discharged, and the coating quality is prevented from being influenced by bubbles generated in the coating process. The coating slot 4 is disposed opposite to the feed channel 21, facilitating rapid coating.

As a variant, the diversion cavity 22 and the pressure equalizing cavity 23 may be both disposed at the bottom end of the upper mold 1, or one may be disposed at the bottom end of the upper mold 1 and one may be disposed at the top end of the lower mold 2, and the positions of the corresponding feed channels 21 may also be adjusted.

Further, the gasket assembly 3 is provided with a connecting member 33 extending out of the body. When different types of slurries are used, the subgasket 32 may need to be replaced in order to ensure uniformity of the areal density of the coating. A connecting piece 33 extending out of the body is arranged on one side of the gasket assembly 3, and the gasket assembly 3 can be conveniently taken down for replacement by clamping or grabbing the connecting piece 33.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims

1. The coating die head capable of adjusting coating uniformity comprises a body, wherein the body is provided with a coating slit (4) and a feeding channel (21), and is characterized in that a shunting cavity (22) and a pressure equalizing cavity (23) are arranged in the body, the shunting cavity (22) is communicated with the feeding channel (21), the pressure equalizing cavity (23) is communicated with the coating slit (4), a gasket component (3) is arranged in the body, and a grid (321) communicated with the shunting cavity (22) and the pressure equalizing cavity (23) is arranged on the gasket component (3).

2. The coating die for adjusting coating uniformity as claimed in claim 1, wherein said body comprises an upper die (1) and a lower die (2), said spacer assembly (3) comprises a female spacer (31) and a sub-spacer (32), said coating slit (4) is formed between said upper die (1) and said lower die (2) through said female spacer (31), said sub-spacer (32) is disposed on one side of said female spacer (31), and said grid (321) is disposed on said sub-spacer (32).

3. The coating die head for adjusting coating uniformity of claim 2, wherein the female gasket (31) comprises a fixed plate (311) and a first side plate (312) and a second side plate (313) respectively arranged at two ends of the fixed plate (311), the coating slit (4) is formed by the gap between the lower die (2) close to the lip edge and the upper die (1) close to the lip edge and between the first side plate (312) and the second side plate (313), and the sub-gasket (32) is detachably arranged between the first side plate (312) and the second side plate (313).

4. The coating die for adjusting coating uniformity as recited in claim 2, wherein the flow dividing cavity (22) is arranged along the length direction of the body, the sub-gasket (32) is located at the discharge end of the flow dividing cavity (22), the number of the grids (321) is several, the grids (321) are arranged along the length direction of the sub-gasket (32), and the width of the grids (321) is gradually increased from the middle to two ends of the sub-gasket (32).

5. The coating die for adjusting coating uniformity as recited in claim 2, wherein said flow dividing cavity (22) and said pressure equalizing cavity (23) are both disposed at the top end of said lower die (2), and said flow dividing cavity (22) and said pressure equalizing cavity (23) are disposed in parallel.

6. The coating die for adjusting coating uniformity as set forth in claim 5, wherein said feed passage (21) is provided at a central portion of one side of said lower die (2), said feed passage (21) communicating with a lowermost end of said flow-dividing chamber (22).

7. The coating die for adjusting coating uniformity according to any one of claims 1 to 6, characterized in that the shim assembly (3) is provided with a connecting member (33) protruding from the body.

8. The coating die for adjusting coating uniformity as set forth in any one of claims 1 to 6, wherein said coating slot (4) is disposed opposite to said feeding passage (21).