CN219745339U - Coating die head and coating device - Google Patents
Coating die head and coating device Download PDFInfo
- Publication number
- CN219745339U CN219745339U CN202320370452.3U CN202320370452U CN219745339U CN 219745339 U CN219745339 U CN 219745339U CN 202320370452 U CN202320370452 U CN 202320370452U CN 219745339 U CN219745339 U CN 219745339U
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- Prior art keywords
- coating
- die
- cavity
- die head
- concave cavity
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- 238000000576 coating method Methods 0.000 title claims abstract description 107
- 239000011248 coating agent Substances 0.000 title claims abstract description 103
- 239000002002 slurry Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims description 29
- 230000014759 maintenance of location Effects 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000011267 electrode slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Coating Apparatus (AREA)
Abstract
The utility model discloses a coating die head and a coating device, wherein the coating die head comprises a first die head and a second die head; the first die head is concavely provided with a first concave cavity; the first die head is fixedly connected with the second die head and surrounds the first die head to form a coating slit, the second die head is provided with a feed inlet and a second concave cavity, the second concave cavity is arranged opposite to the first concave cavity and surrounds the first concave cavity to form a distribution cavity, the feed inlet is communicated with the middle part of the distribution cavity, and the coating slit is communicated with the distribution cavity; the depth of two sides of the first concave cavity and/or the second concave cavity is greater than the depth of the middle part. The utility model improves the structure of the coating die head, improves the fluidity of the slurry, avoids the deposition or retention of the slurry in a distribution cavity, can adjust the transverse surface density, and improves the coating uniformity.
Description
The present utility model claims priority from the chinese patent office, application number 202210168981.5, chinese patent application entitled "coating die and coating apparatus," filed on day 23 of 2022, 02, the entire contents of which are incorporated herein by reference.
Technical Field
The utility model relates to the technical field of coating dies, in particular to a coating die and a coating device.
Background
Slit extrusion coating is a precise wet coating technique, and its working principle is that a slurry is extruded and ejected along a slit of a coating die under a certain pressure and a certain flow rate to be transferred onto 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, so that pollutants can be prevented from entering in the coating process, the slurry utilization rate is high, the slurry property can be kept stable, and the multilayer coating can be simultaneously carried out. And can adapt to different slurry viscosity and solid content ranges.
The existing coating die head consists of an upper die head, a lower die head and a gasket clamped in the upper die head, wherein the lower die head is provided with a cavity, the front end of the gasket is provided with a notch for the slurry to flow out, 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, and then the coating lip is used for extruding and coating the slurry onto a substrate on a coating roller, so that a functional layer is formed on the substrate, such as coating a negative electrode slurry on a copper foil to form a battery negative electrode plate; and coating positive electrode slurry on the aluminum foil to form a battery positive electrode plate.
At present, as the requirements of battery pole pieces are gradually increased, the coating is required to be carried out by slurry with higher solid content. However, the cavity of the existing coating die head is arranged at the lower die head, and edges and corners exist when the cavity is in contact with the upper die head, so that the flow of slurry is hindered, and in the coating process, the slurry with higher solid content is easy to stay in the cavity of the coating die head due to poor fluidity, so that the coating quality is reduced and the slurry is wasted.
Disclosure of Invention
The utility model mainly aims to provide a coating die head and a coating device, which aim to improve the fluidity of solid-containing slurry so as to improve the coating quality and reduce the waste of the slurry.
To achieve the above object, the present utility model provides a coating die comprising:
the first die head is concavely provided with a first concave cavity; and
the second die head is fixedly connected with the first die head and surrounds the first die head to form a coating slit, the second die head is provided with a feed inlet and a second concave cavity, the second concave cavity is arranged opposite to the first concave cavity and surrounds the first concave cavity to form a distribution cavity, the feed inlet is communicated with the middle part of the distribution cavity, and the coating slit is communicated with the distribution cavity;
the depth of two sides of the first concave cavity and/or the second concave cavity is greater than the depth of the middle part of the first concave cavity and/or the second concave cavity.
Optionally, the bottoms of the cavities at two sides of the second concave cavity are both concavely provided with sub-runners, and the depths of the two sub-runners are greater than the depth of the middle part of the second concave cavity.
Optionally, the coating die has a first side and a second side opposite along a length direction thereof, the coating die further comprises a first side plate and a second side plate, the first side plate is fixed on the first side, and the second side plate is fixed on the second side.
Optionally, the coating die further comprises a heating element provided at the first die and/or the second die for heating the slurry in the distribution chamber.
Optionally, the coating die further comprises a temperature sensor, and the temperature sensor is arranged at the first die and/or the second die and is used for detecting the temperature of the first die and/or the second die.
Optionally, the coating die head further comprises a controller, and the controller is in signal connection with the temperature sensor and the heating piece respectively, so as to control the heating piece to work according to a temperature signal fed back by the temperature sensor.
In order to achieve the above object, the present utility model also proposes a coating apparatus including the coating die as described above, the coating die comprising:
the first die head is concavely provided with a first concave cavity;
the second die head is fixedly connected with the first die head and surrounds the first die head to form a coating slit, the second die head is provided with a feed inlet and a second concave cavity, the second concave cavity is arranged opposite to the first concave cavity and surrounds the first concave cavity to form a distribution cavity, the feed inlet is communicated with the middle part of the distribution cavity, and the coating slit is communicated with the distribution cavity; the depth of two sides of the first concave cavity and/or the second concave cavity is greater than the depth of the middle part of the first concave cavity and/or the second concave cavity.
In the technical scheme of the utility model, the coating die head comprises a first die head and a second die head; the first die head is concavely provided with a first concave cavity; the first die head is fixedly connected with the second die head and surrounds the first die head to form a coating slit, the second die head is provided with a feed inlet and a second concave cavity, the second concave cavity is arranged opposite to the first concave cavity and surrounds the first concave cavity to form a distribution cavity, the feed inlet is communicated with the middle part of the distribution cavity, and the coating slit is communicated with the distribution cavity; the depth of the two sides of the first concave cavity and/or the second concave cavity is greater than the depth of the middle part of the first concave cavity and/or the second concave cavity. It can be understood that the cavities with the depths of two sides being greater than the depth of the middle part have no edges, so that the slurry can flow conveniently, and the problem of slurry retention caused by the edges is avoided; and, because the depth at both ends of the cavity is greater than the depth of the middle part, when slurry flows into the cavity from the middle part, the slurry can flow to both sides of the distribution cavity at a faster speed, thereby improving the uniformity of the coating thickness.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a coating die according to an embodiment of the present utility model;
FIG. 2 is an exploded view of a portion of one embodiment of a coating die of the present utility model;
FIG. 3 is a front view of an embodiment of a coating die of the present utility model;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 5 is a schematic diagram of a second die in an embodiment of a coating die according to the utility model.
Reference numerals illustrate:
10. a first die; 20. a second die; 10a, a first cavity; 20a, a second cavity; 20b, a feed inlet; 100a, a dispensing chamber; 100b, coating a slit; 11. a first lip; 21. a second lip; 101. coating a lip; 50. a first side plate; 60. a second side plate; 51. a first bump; 61. a second bump; 70. and a heating member.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a coating die head, which is suitable for a coating device, in particular to a high-solid-content slurry coating machine, and is not limited in the process.
Referring to fig. 1 to 5, in an embodiment of the present utility model, the coating die includes a first die 10 and a second die 20; the first die head 10 is concavely provided with a first concave cavity 10a; the first die head 10 is fixedly connected with the second die head 20 and encloses to form a coating slit 100b, the second die head 20 is provided with a second concave cavity 20a and a feeding hole 20b, the second concave cavity 20a is opposite to the first concave cavity 10a and encloses to form a distribution cavity 100a, the feeding hole 20b is communicated with the middle part of the distribution cavity 100a, and the coating slit 100b is communicated with the distribution cavity 100 a. Wherein, as shown in fig. 5, the depth of both sides of the first cavity 10a and/or the second cavity 20a is greater than the depth of the middle thereof.
In this embodiment, the first die 10 may be an upper die, and the second die 20 may be a lower die; of course, the first die 10 may be a lower die, and the second die 20 may be an upper die, but the present utility model is not limited thereto.
Referring to fig. 5, in the present embodiment, the first cavity 10a and the second cavity 20a are both disposed in an arc shape. The bottoms of the two side cavities of the second concave cavity 20a are concavely provided with sub-runners, and the depth of the two sub-runners is larger than that of the middle part of the second concave cavity 20 a. Of course, in other embodiments, the depth of both sides of the first cavity 10a and/or the second cavity 20a may be greater than the depth of the middle thereof in other ways, which are not limited herein.
In the technical scheme of the utility model, the coating die comprises a first die 10 and a second die 20; the first die head 10 is concavely provided with a first concave cavity 10a; the first die head 10 is fixedly connected with the second die head 20 and surrounds the second die head 20 to form a coating slit 100b, the second die head 20 is provided with a feed inlet 20b and a second concave cavity 20a, the second concave cavity 20a is opposite to the first concave cavity 10a and surrounds the first concave cavity to form a distribution cavity 100a, the feed inlet 20b is communicated with the middle part of the distribution cavity 100a, and the coating slit 100b is communicated with the distribution cavity 100 a; wherein the depth of both sides of the first cavity 10a and/or the second cavity 20a is greater than the depth of the middle thereof. It can be understood that the cavity of the structure has no edges and corners, so that the slurry can flow conveniently, and the problem of slurry retention caused by the edges and corners is avoided. And, since the depth of both ends of the cavity is greater than that of the middle portion, when slurry flows into the cavity from the middle portion, it can flow to both sides of the distribution chamber 100a at a faster speed, thereby improving uniformity of coating thickness.
To enhance the overall robustness of the coating die, referring primarily to fig. 1, in one embodiment the coating die has first and second opposite sides along its length, the coating die further comprises a first side plate 50 and a second side plate 60, the first side plate 50 being secured to the first side and the second side plate 60 being secured to the second side.
In this embodiment, referring to fig. 1, 2 and 4, the first die head 10 is provided with a first lip 11, the second die head 20 is provided with a second lip 21 opposite to the first lip 11, and the first lip 11 and the second lip 21 are surrounded to form a coating lip 101.
Further, the first side plate 50 is provided with a first bump 51, the second side plate 60 is provided with a second bump 61, and the first bump 51 and the second bump 61 are respectively embedded between the first die head 10 and the second die head 20 and clamped with the first lip 11 and the second lip 21 to form a coating slit 100b. Thus, the uniformity of the height of the coating slit 100b can be ensured, so that the discharge thickness is more uniform, and the uniformity of the coating thickness is further improved.
In this embodiment, the first bump 51 may be embedded in the first side plate 50 and locked by a screw, or fastened by a clamping manner; the second protrusion 61 may be embedded in the second side plate 60 and locked by a screw, or fastened by a clamping method, which is not limited herein.
Referring to fig. 4, in one embodiment, the coating die further includes a heating element 70, wherein the heating element 70 is disposed on the first die 10 and/or the second die 20 for heating the slurry in the distribution chamber 100 a.
In this embodiment, the heating element 70 may be a heating rod, and the heating rod may indirectly heat the slurry in the distribution chamber 100a by heating the coating die head, so as to increase the fluidity of the slurry, avoid deposition or retention of the slurry, reduce the waste of the slurry, and improve the quality of coating.
In addition, the heating element 70 may be a heating tube, and the first die head 10 and the second die head 20 may be provided with channels for installing the heating tube, and a heating medium may be introduced into the heating tube, so as to heat the slurry by adjusting the temperature of the heating medium.
To further enhance the quality of the coating, in one embodiment, the coating die may further include a temperature sensor provided to the first die 10 and/or the second die 20 for detecting the temperature of the first die 10 and/or the second die 20.
In the present embodiment, the temperature sensor may be a thermistor or the like, which is not limited herein.
Further, the coating die head can further comprise a controller which is respectively connected with the temperature sensor and the heating element 70 in a signal manner and is used for controlling the heating element 70 to work according to the temperature signal fed back by the temperature sensor.
In this embodiment, the heating element 70 and the temperature sensor cooperate to maintain the temperature of the coating die within a certain range, so as to achieve better fluidity of the slurry. During the coating process, when the temperature of the coating die reaches the maximum value of the desired temperature range, the controller controls the heating member 70 to stop heating; when the temperature of the coating die is lower than the required temperature range, the controller controls the coating die to start heating so as to adjust the temperature of the slurry within the required range.
The present utility model also proposes a coating apparatus including a coating die having a specific structure referring to the above-described embodiment, and since the coating apparatus proposed by the present utility model includes all aspects of all embodiments of the above-described coating die, it has at least the same technical effects as the coating die, which are not described herein.
The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (7)
1. A coating die, comprising:
a first die head (10) provided with a first concave cavity (10 a) in a concave manner; and
the second die head (20) is fixedly connected with the first die head (10) and surrounds the first die head to form a coating slit (100 b), the second die head (20) is provided with a second concave cavity (20 a) and a feeding hole (20 b), the second concave cavity (20 a) and the first concave cavity (10 a) are oppositely arranged and surround the first concave cavity to form a distribution cavity (100 a), the feeding hole (20 b) is communicated with the middle part of the distribution cavity (100 a), and the coating slit (100 b) is communicated with the distribution cavity (100 a);
wherein the depth of the two sides of the first concave cavity (10 a) and/or the second concave cavity (20 a) is greater than the depth of the middle part of the first concave cavity.
2. The coating die according to claim 1, wherein the bottoms of the cavities on both sides of the second cavity (20 a) are concavely provided with sub-runners, and the depth of the sub-runners is greater than the depth of the middle part of the second cavity (20 a).
3. The coating die of claim 1, wherein the coating die has first and second opposite sides along its length, the coating die further comprising first and second side plates (50, 60), the first side plate (50) being secured to the first side and the second side plate (60) being secured to the second side.
4. The coating die according to claim 1, further comprising a heating element (70), said heating element (70) being provided to said first die (10) and/or said second die (20) for heating the slurry in said distribution chamber (100 a).
5. The coating die according to claim 4, further comprising a temperature sensor provided to the first die (10) and/or the second die (20) for detecting the temperature of the first die (10) and/or the second die (20).
6. The coating die of claim 5, further comprising a controller in signal communication with each of the temperature sensor and the heating element (70) for controlling operation of the heating element (70) based on temperature signals fed back by the temperature sensor.
7. A coating apparatus comprising the coating die according to any one of claims 1 to 6.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210168981.5A CN114433422A (en) | 2022-02-23 | 2022-02-23 | Coating die head and coating device |
| CN2022101689815 | 2022-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219745339U true CN219745339U (en) | 2023-09-26 |
Family
ID=81373701
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210168981.5A Pending CN114433422A (en) | 2022-02-23 | 2022-02-23 | Coating die head and coating device |
| CN202320328488.5U Active CN219442273U (en) | 2022-02-23 | 2023-02-20 | Coating die head and coating device |
| CN202320370452.3U Active CN219745339U (en) | 2022-02-23 | 2023-02-20 | Coating die head and coating device |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210168981.5A Pending CN114433422A (en) | 2022-02-23 | 2022-02-23 | Coating die head and coating device |
| CN202320328488.5U Active CN219442273U (en) | 2022-02-23 | 2023-02-20 | Coating die head and coating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN114433422A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231000A1 (en) * | 2022-06-02 | 2023-12-07 | 宁德时代新能源科技股份有限公司 | Extrusion coating apparatus and battery production system |
| CN115106254B (en) * | 2022-07-01 | 2023-08-15 | 福建恒安集团有限公司 | Adjustable clearance scraping gun |
| WO2024082217A1 (en) * | 2022-10-20 | 2024-04-25 | 宁德时代新能源科技股份有限公司 | Coating device for coating electrode sheet, and battery production system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197659C (en) * | 2000-06-01 | 2005-04-20 | 平野有限公司 | Lip coating type coating device |
| EP2444165B1 (en) * | 2009-06-18 | 2016-10-19 | Konica Minolta Holdings, Inc. | Coating method |
| CN202497970U (en) * | 2012-01-11 | 2012-10-24 | 深圳市信宇人科技有限公司 | Novel slit type spray head and spray coating machine head |
| EP3331683A1 (en) * | 2015-08-04 | 2018-06-13 | Covestro Deutschland AG | Casting device for applying a foaming reaction mixture |
| CN108544731A (en) * | 2018-05-19 | 2018-09-18 | 马润秋 | Surface glue double-sided double-clothes hanger runner coating die for wide whole-core flame-retardant conveying belt |
| CN209318048U (en) * | 2018-09-30 | 2019-08-30 | 中兴高能技术有限责任公司 | A kind of miniature extrusion coated head |
| CN214320739U (en) * | 2020-12-17 | 2021-10-01 | 宁德中能电子设备有限公司 | Coating structure of lip inlaid copper strip used in battery pole piece coating device |
-
2022
- 2022-02-23 CN CN202210168981.5A patent/CN114433422A/en active Pending
-
2023
- 2023-02-20 CN CN202320328488.5U patent/CN219442273U/en active Active
- 2023-02-20 CN CN202320370452.3U patent/CN219745339U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114433422A (en) | 2022-05-06 |
| CN219442273U (en) | 2023-08-01 |
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