CN216880143U

CN216880143U - Coating die head and coating device

Info

Publication number: CN216880143U
Application number: CN202220207598.1U
Authority: CN
Inventors: 彭建林; 陈贵山
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-07-05
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses a coating die head and a coating device, wherein the coating die head comprises a die head body and a cavity adjusting assembly; the die head body is provided with a distribution cavity; the cavity regulating assembly is arranged on the die head body and communicated with an external air source, the cavity regulating assembly comprises an air bag, the air bag is arranged in the distribution cavity, and a pulp storage space is formed by the surrounding of the bag wall of the air bag and the cavity wall of the distribution cavity; the air bag is used for changing the size of the pulp storage space through expansion or contraction. The utility model improves the structure of the coating die head, can meet the requirements of different sizing agents on the size of the distribution cavity, does not need to stop the machine to replace the die heads with the distribution cavities with different sizes, improves the production efficiency and reduces the cost.

Description

Coating die head and coating device

Technical Field

The utility model relates to the technical field of coating die heads, in particular to a coating die head and a coating device.

Background

Slit extrusion coating is a precise wet coating technique, and the working principle of the slit extrusion coating is that slurry is extruded and sprayed along a gap of a coating die head under a certain pressure and a certain flow rate and is transferred to a substrate. Compared with other coating modes, the coating method has the advantages of high coating speed, high precision and uniform wet thickness; the coating system is closed, can prevent pollutants from entering in the coating process, has high slurry utilization rate, can keep the stable slurry property, and can carry out multilayer coating simultaneously. And can adapt to different slurry viscosity and solid content ranges.

The existing coating die head is composed of an upper die head, a lower die head and a gasket clamped in the upper die head, wherein a cavity is formed in the lower die head, a gap for slurry to flow out is formed in the front end of the gasket, the upper die head and the lower die head clamp the gasket to form a coating slit, the slurry enters the cavity from a feed inlet and passes through the coating slit, then is extruded and coated on a base material on a coating roller through a coating lip, and is coated on the base material to form a functional layer, for example, a copper foil is coated with a negative electrode slurry to form a battery negative electrode sheet; and coating the positive electrode slurry on the aluminum foil to form the battery positive electrode plate.

At present, coating dies with cavities of different sizes are needed for different slurries in the production process. In the prior art, cavities with different sizes are cut on the lower die, when different cavities need to be used, the lower die is replaced, and the adaptability of a single die head is poor. This kind of mode has not only increased manufacturing cost, need shut down moreover and change the lower mould of coating die head, has reduced production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a coating die head and a coating device, aiming at meeting the requirements of different sizing agents on the size of a distribution cavity by a single coating die head, avoiding the halt of replacing the die head, improving the production efficiency and reducing the cost.

To achieve the above object, the present invention provides a coating die comprising:

the die head body is provided with a distribution cavity; and

the cavity adjusting assembly is arranged on the die head body and communicated with an external air source, the cavity adjusting assembly comprises an air bag, the air bag is arranged in the distribution cavity, and a pulp storage space is formed by the surrounding of the bag wall of the air bag and the cavity wall of the distribution cavity;

the air bag is used for changing the size of the pulp storage space through expansion or contraction.

Optionally, the die head body is provided with a slot communicated with the distribution cavity, and the air bag is communicated with an external air source through the slot; or the cavity adjusting assembly further comprises an inflating rod, the inflating rod is inserted into the inserting groove and communicated with the air bag, and the inflating rod is communicated with an external air source.

Optionally, the airbag includes an airbag body and a fixing portion connected to the airbag body, the fixing portion is embedded in a communication position between the insertion slot and the distribution chamber, the airbag body is disposed in the distribution chamber, and the fixing portion is connected to the inflation rod.

Optionally, the fixing portion is arranged in a square shape, and the airbag body is arranged in a cylindrical shape.

Optionally, the inflation rod is a hollow metal rod, and the metal rod and the airbag are integrally formed; or

The inflation rod and the air bag are manufactured in a split forming mode, a protrusion is arranged at the communication position of the slot and the distribution cavity, and a clamping groove matched with the protrusion in a clamping mode is arranged at the position, corresponding to the protrusion, of the fixing portion of the air bag.

Optionally, a connecting piece is arranged at the extending end of the inflating rod, an air port used for being communicated with an external air source is formed in the connecting piece, and the connecting piece is fixed on the die head body through a cover plate.

Optionally, the cavity adjusting assembly further comprises:

the gas source control assembly is arranged on the die head body, one end of the gas source control assembly is communicated with the inflation rod, and the other end of the gas source control assembly is used for being communicated with an external gas source;

the gas source control assembly is used for introducing or extracting gas so as to adjust the expansion or contraction amount of the air bag.

Optionally, a plurality of bag cavities are arranged in the airbag, two adjacent bag cavities are separated by a diaphragm, and each bag cavity is communicated with the air source control assembly through one inflation rod.

Optionally, a sealing member is disposed between the inflation rod and the slot wall of the slot to seal a gap between the inflation rod and the slot wall of the slot.

In order to achieve the above object, the present invention also proposes a coating apparatus including the coating die as described above, the coating die including:

the die head body is provided with a distribution cavity; and

According to the technical scheme, the coating die head comprises a die head body and a cavity adjusting assembly, the die head body is provided with a distribution cavity, the cavity adjusting assembly is arranged on the die head body and communicated with an external air source, the cavity adjusting assembly comprises an air bag, the air bag is arranged in the distribution cavity, a bag wall of the air bag and a cavity wall of the distribution cavity are arranged in a surrounding mode to form a slurry storage space, and the air bag is used for changing the size of the slurry storage space through expansion or contraction, so that the adaptability of the die head is improved, the requirements of different slurries on the size of the distribution cavity can be met, the die head with the distribution cavity of different sizes does not need to be stopped for replacement, the production efficiency is improved, and the cost is reduced.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a coating die of the present invention;

FIG. 2 is a top view of one embodiment of the coating die of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic diagram of a cavity adjustment assembly in an embodiment of a coating die of the present invention.

The reference numbers illustrate:

10. a die head body; 20. a cavity adjusting assembly; 10a, a distribution chamber; 110. an upper die head; 120. a lower die head; 130. a gasket; 210. an air bag; 220. an inflation rod; 211. an airbag body; 212. a fixed part; 213. a connecting member; 213a, gas port; 214. a cover plate; 120a, a feed inlet.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a coating die head which is suitable for a coating device, in particular a high-temperature slurry coating machine, and the application is not limited in the above.

Referring to fig. 1 to 3, in an embodiment of the present invention, a coating die includes a die body 10 and a cavity adjustment assembly 20; the die head body 10 is provided with a distribution chamber 10 a; the cavity regulating assembly 20 is arranged on the die head body 10 and is communicated with an external air source, the cavity regulating assembly 20 comprises an air bag 210, the air bag 210 is arranged in the distribution cavity 10a, and the wall of the air bag 210 and the wall of the distribution cavity 10a are surrounded to form a slurry storage space; the bladder 210 is used to change the size of the slurry storage space by expanding or contracting.

In this embodiment, the die body 10 includes an upper die 110 and a lower die 120, the distribution cavity 10a is generally opened in the lower die 120, and the cavity adjustment assembly 20 may be mounted on the upper die 110 and extend into the distribution cavity 10a, mounted on the lower die 120 and extend into the distribution cavity 10a, or mounted inside the upper die 110 or the lower die 120, which is not particularly limited herein.

The gasket 130 is clamped between the upper die head 110 and the lower die head 120, the upper die head 110, the lower die head 120 and the gasket 130 are surrounded to form a coating slit, the upper die head 110 and the lower die head 120 form a die head lip communicated with the coating slit at a discharging position, the distribution cavity 10a is communicated with the coating slit, and the lower die head 120 is provided with a feeding hole 120a and a feeding channel communicated with the feeding hole 120 a. During the coating process, the slurry is introduced from the inlet 120a and flows into the slurry storage space in the distribution chamber 10a through the inlet channel, and then is coated on the surface of the substrate through the coating slit and the die lip.

In this embodiment, the air bag 210 may be made of a material with good elastic performance, and is not limited herein.

In the technical scheme of the utility model, the coating die head comprises a die head body 10 and a cavity adjusting assembly 20, the die head body 10 is provided with a distribution cavity 10a, the cavity adjusting assembly 20 is arranged on the die head body 10 and is communicated with an external air source, the cavity adjusting assembly 20 comprises an air bag 210, the air bag 210 is arranged in the distribution cavity 10a, the wall of the air bag 210 and the wall of the distribution cavity 10a are surrounded to form a slurry storage space, and the air bag 210 is used for changing the size of the slurry storage space through expansion or contraction, so that the adaptability of the die head is improved, the requirements of different slurries on the size of the distribution cavity 10a can be met, the die heads of different sizes of the distribution cavities 10a do not need to be stopped for replacement, the production efficiency is improved, and the cost is reduced.

In order to facilitate assembly and improve the tightness of the cavity adjusting assembly 20, and avoid air leakage, so as to improve control accuracy, referring to fig. 3 and 4, in an embodiment, the cavity adjusting assembly 20 may further include an inflation rod 220, the die body 10 is provided with a slot communicated with the distribution cavity 10a, and the inflation rod 220 is inserted into the slot and communicated with the air bag 210.

Of course, in some embodiments, the inflation rod 220 may not be provided, and the air bag 210 may be communicated with an external air source through the slot. Therefore, parts can be reduced, and the cost is saved.

In this embodiment, the slot may be opened in the upper die 110 or in the lower die 120, which is not limited herein.

In this embodiment, the inflation rod 220 may be a hollow metal rod integrally formed with the airbag 210 to improve the assembly convenience. Of course, the inflation rod 220 can also be manufactured separately from the airbag 210 for processing; the connection between the insertion slot and the distribution chamber 10a may be provided with a protrusion, and the fixing portion 212 of the airbag 210 is provided with a clamping slot corresponding to the protrusion, so as to improve the mounting stability of the chamber adjustment assembly 20.

In order to improve the assembling stability of the bladder 210 and thus the accuracy of adjusting the size of the slurry storage space, referring to fig. 3 and 4, in an embodiment, the bladder 210 may include a bladder body 211 and a fixing portion 212 connected to the bladder body 211, the fixing portion 212 is inserted into a communication portion between the insertion groove and the distribution chamber 10a, the bladder body 211 is disposed in the distribution chamber 10a, and the fixing portion 212 is connected to the inflating rod 220.

Referring mainly to fig. 4, preferably, the fixing portion 212 may be provided in a square shape, and the airbag body 211 may be provided in a cylindrical shape. Thus, the installation of the airbag 210 is facilitated, and the airbag 210 is prevented from being deviated or separated from the installation position during the expansion or contraction process.

Referring to fig. 4, in an embodiment, the extended end of the gas filling rod 220 may be provided with a connecting member 213, the connecting member 213 may be provided with a gas port 213a for communicating with an external gas source, and the connecting member 213 may be fixed to the die body 10 through a cover plate 214. Therefore, the air pipe can be conveniently connected, and the operation convenience is improved.

In order to improve the accuracy of controlling the size of the air bag 210, in an embodiment, the cavity adjusting assembly 20 further includes an air supply control assembly (not shown), the air supply control assembly is disposed on the die head body 10, one end of the air supply control assembly is communicated with the inflating rod 220, and the other end of the air supply control assembly is used for being communicated with an external air supply; and the air source control assembly is used for introducing or extracting air to adjust the expansion or contraction amount of the air bag 210.

In this embodiment, the gas source control assembly may include components such as a gas pressure valve, a gas flow valve, and the like, which are not limited herein.

In order to further improve the accuracy of adjusting the slurry storage space, in one embodiment, a plurality of chambers may be disposed in the air bag 210, two adjacent chambers are separated by a diaphragm, and each chamber is communicated with the air supply control assembly through an air filling rod 220.

In this embodiment, by controlling the independent bladder cavities one-to-one, the air bag 210 can be ensured to be expanded or contracted to a preset size, so that each part of the air bag can be stably deformed, and further, the slurry storage space can be ensured to be in a target size to match different slurries.

Further, in some embodiments, a seal (not shown) is disposed between the inflation rod 220 and the slot wall of the slot to seal a gap between the inflation rod 220 and the slot wall of the slot. Therefore, gas leakage can be avoided, and the accuracy of adjusting the size of the slurry storage space can be further improved.

The present invention also provides a coating apparatus including a coating die, the specific structure of which is described with reference to the above embodiments, and since the coating apparatus provided by the present invention includes all the aspects of all the embodiments of the coating die, it has at least the same technical effects as the coating die, and therefore, it is not set forth herein.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A coating die, comprising:

a die head body (10) provided with a distribution chamber (10 a); and

the cavity regulating assembly (20) is arranged on the die head body (10) and is communicated with an external air source, the cavity regulating assembly (20) comprises an air bag (210), the air bag (210) is arranged in the distribution cavity (10a), and a slurry storage space is formed by the bag wall of the air bag (210) and the cavity wall of the distribution cavity (10a) in an enclosing manner;

the air bag (210) is used for changing the size of the pulp storage space through expansion or contraction.

2. The coating die of claim 1, wherein the die body (10) is provided with a slot communicating with the distribution chamber (10a), and the air bag (210) is communicated with an external air source through the slot; or the cavity adjusting assembly (20) further comprises an inflating rod (220), the inflating rod (220) is inserted into the inserting groove and communicated with the air bag (210), and the inflating rod (220) is communicated with an external air source.

3. The coating die of claim 2, wherein the balloon (210) comprises a balloon body (211) and a fixing portion (212) connected to the balloon body (211), the fixing portion (212) is embedded at a communication of the insertion slot and the distribution chamber (10a), the balloon body (211) is disposed in the distribution chamber (10a), and the fixing portion (212) is connected to the inflating rod (220).

4. The coating die according to claim 3, characterized in that said fixing portion (212) is square-shaped and said balloon body (211) is cylindrical-shaped.

5. The coating die of claim 3, wherein the gas-filled rod (220) is a hollow metal rod that is made integral with the balloon (210); or

The inflation rod (220) and the air bag (210) are manufactured in a split forming mode, a protrusion is arranged at the communication position of the slot and the distribution cavity (10a), and a clamping groove matched with the protrusion in a clamping mode is arranged at the position, corresponding to the protrusion, of the fixing portion (212) of the air bag (210).

6. The coating die of claim 2, wherein the extended end of the air-filling rod (220) is provided with a connecting piece (213), the connecting piece (213) is provided with an air port (213a) for communicating with an external air source, and the connecting piece (213) is fixed on the die body (10) through a cover plate (214).

7. The coating die of claim 6, wherein said cavity conditioning assembly (20) further comprises:

the gas source control assembly is arranged on the die head body (10), one end of the gas source control assembly is communicated with the inflation rod (220), and the other end of the gas source control assembly is used for being communicated with an external gas source;

the gas source control assembly is used for introducing or extracting gas so as to adjust the expansion or contraction amount of the air bag (210).

8. The coating die of claim 7, wherein a plurality of pockets are formed in said bladder (210), adjacent pockets being separated by a diaphragm, each pocket being in communication with said air supply control assembly via an air inflation rod (220).

9. The coating die of claim 2, wherein a seal is provided between the gas-filled rod (220) and the slot wall of the slot to seal a gap between the gas-filled rod (220) and the slot wall of the slot.

10. A coating apparatus comprising a coating die according to any one of claims 1 to 9.