CN114733714A - Double-layer adhesive dispensing gasket and coating die head - Google Patents
Double-layer adhesive dispensing gasket and coating die head Download PDFInfo
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- CN114733714A CN114733714A CN202210413725.8A CN202210413725A CN114733714A CN 114733714 A CN114733714 A CN 114733714A CN 202210413725 A CN202210413725 A CN 202210413725A CN 114733714 A CN114733714 A CN 114733714A
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- 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
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- 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
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
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- 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
Abstract
The invention discloses a double-layer dispensing gasket and a coating die head, wherein the double-layer dispensing gasket comprises a gasket body and a dispensing flow channel; the glue dispensing flow channel comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel are respectively arranged on the gasket body, the discharge end of the first flow channel is a first glue outlet, the discharge end of the second flow channel is a second glue outlet, and the first glue outlet and the second glue outlet are oppositely arranged in the thickness direction of the gasket body. The invention improves the glue dispensing flow channel structure of the gasket, realizes double-layer glue dispensing while coating slurry, can coat two layers of different insulating glue simultaneously, and greatly improves the production efficiency.
Description
Technical Field
The invention relates to the technical field of coating die heads, in particular to a double-layer dispensing gasket and a coating die head.
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, so that pollutants can be prevented from entering the coating process, the utilization rate of the slurry is high, the stable property of the slurry can be kept, and the coating system can adapt to different slurry viscosity and solid content ranges.
The coating die head is composed of an upper die head, a lower die head and a gasket clamped in the upper die head, a cavity is formed in the lower die head, slurry enters the cavity from a feed port, a notch for the slurry to flow out is formed in the front end of the gasket, the upper die head, the lower die head and the gasket are arranged in a surrounding mode to form a coating slit, the slurry extrudes the coating slurry from a lip to a base material on a coating roller through the coating slit, a functional layer is formed on the base material, and if negative electrode slurry is coated on a copper foil, a battery negative electrode sheet is formed; and coating the positive electrode slurry on the aluminum foil to form the battery positive electrode plate.
In the prior art, the gasket is composed of a base body and flow baffle plates on two sides, a glue dispensing flow channel is formed in each flow baffle plate, insulating glue flows into a glue inlet on the gasket from a glue dispensing hole of the coating die head, and then flows out of a glue outlet at one end of the glue dispensing flow channel to be coated on a base material, so that the insulating glue is coated on the base material at the edge of the slurry while the slurry is coated.
Under some conditions, two different insulating glues need to be coated on the edge of the base material slurry, however, the existing coating gasket cannot meet the requirement of simultaneously coating two layers of different insulating glues, double-layer synchronous glue dispensing cannot be realized, glue dispensing needs to be carried out step by step, and the production efficiency is greatly reduced.
Disclosure of Invention
The invention mainly aims to provide a double-layer dispensing gasket and a coating die head, aiming at realizing double-layer dispensing while coating slurry so as to improve the production efficiency.
In order to achieve the above object, the present invention provides a double-layer dispensing gasket, including:
a gasket body; and
the glue dispensing flow channel comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel are respectively arranged on the gasket body, the discharge end of the first flow channel is a first glue outlet, the discharge end of the second flow channel is a second glue outlet, and the first glue outlet and the second glue outlet are oppositely arranged in the thickness direction of the gasket body.
Optionally, the first glue outlet is formed in the back surface of the gasket body, and the second glue outlet is formed in the front surface of the gasket body.
Optionally, the first flow channel comprises a first section, a second section, a third section and a fourth section which are sequentially communicated from the feeding end to the discharging end, the first section of the first flow channel is arranged on the front surface of the gasket body, the second section of the first flow channel is arranged on the back surface of the gasket body, the third section of the first flow channel is arranged on the front surface of the gasket body, and the fourth section of the first flow channel is arranged on the back surface of the gasket body;
the second section and the first section of the first flow channel, the second section and the third section of the first flow channel, and the fourth section and the third section of the first flow channel are respectively communicated through holes.
Optionally, a receiving groove for receiving the adjusting block is formed in the front surface of the gasket body corresponding to the second section of the first flow channel.
Optionally, the second runner includes at least a feeding section and a discharging section that are sequentially communicated from a feeding end to a discharging end of the second runner, the feeding section and the discharging section of the second runner are both arranged on the front face of the gasket body, the discharging section of the second runner is arranged back to back with the fourth section of the first runner, and at least part of the projection of the second runner in the thickness direction of the gasket body is overlapped.
Optionally, the gasket body comprises:
a substrate; and
the two flow baffles are respectively arranged on two sides of the base body and surround the base body to form a slurry outlet, the dispensing flow channel is arranged at the end part of the flow baffle, and the first glue outlet and the second glue outlet are both arranged close to the slurry outlet.
Optionally, a holding portion is disposed on the substrate for holding the double-layer dispensing gasket.
Optionally, a protrusion is disposed on the substrate for pushing or pulling the double-layer dispensing gasket.
Optionally, the base body and/or the flow baffle are provided with mounting holes for bolts to pass through.
In order to achieve the above object, the present invention also provides a coating die comprising:
the upper die head is provided with a first dispensing hole for introducing first insulating glue and a second dispensing hole for introducing second insulating glue;
the lower die head is fixedly connected with the upper die head; and
the double-layer dispensing gasket is clamped between the upper die head and the lower die head and is surrounded to form a coating slit; wherein, the first runner with first point is glued the hole intercommunication, the second runner with second point is glued the hole intercommunication, double-deck some glue gaskets include:
a gasket body; and
the glue dispensing flow channel comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel are respectively arranged on the gasket body, the discharge end of the first flow channel is a first glue outlet, the discharge end of the second flow channel is a second glue outlet, and the first glue outlet and the second glue outlet are oppositely arranged in the thickness direction of the gasket body.
In the technical scheme of the invention, the double-layer glue dispensing gasket comprises a gasket body and a glue dispensing flow channel, the glue dispensing flow channel comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel are respectively arranged on the gasket body, the discharge end of the first flow channel is a first glue outlet, the discharge end of the second flow channel is a second glue outlet, and the first glue outlet and the second glue outlet are oppositely arranged in the thickness direction of the gasket body, so that double-layer glue dispensing is realized while slurry is coated, two layers of different insulating glue can be coated simultaneously, and the production efficiency is greatly improved.
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 front view of a dual layer dispensing gasket in accordance with one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a dual-layer dispensing gasket according to an embodiment of the present invention;
fig. 3 is an enlarged view of a portion a of fig. 2.
The reference numbers illustrate:
10. a gasket body; 20. dispensing flow channels; 21. a first flow passage; 22. a second flow passage; 21c, a first glue outlet; 22c and a second glue outlet; 21a, a first glue inlet; 22a and a second glue inlet; 211. a first stage; 213. a third stage; 212a, hole flanging; 101a, a containing groove; 221. a feeding section; 222. a discharging section; 11. a substrate; 12. a flow baffle plate; 10a, a slurry outlet; 111. a holding part; 112. a convex portion; 10b, mounting holes.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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 invention provides a double-layer dispensing gasket, which is suitable for a coating die head, in particular a high-temperature slurry coating head, and is not limited in the specification.
Referring to fig. 1 to 3, in an embodiment of the present invention, the dual-layer dispensing gasket includes a gasket body 10 and a dispensing flow channel 20; the dispensing flow channel 20 includes a first flow channel 21 and a second flow channel 22, the first flow channel 21 and the second flow channel 22 are respectively disposed on the gasket body 10, a discharge end of the first flow channel 21 is a first glue outlet 21c, a discharge end of the second flow channel 22 is a second glue outlet 22c, and the first glue outlet 21c and the second glue outlet 22c are oppositely disposed in a thickness direction of the gasket body 10.
In order to enable two different insulating glues to be stacked in the thickness direction of the gasket body 10 to achieve synchronous double-layer dispensing, in the present invention, the first glue outlet 21c and the second glue outlet 22c are disposed opposite to each other in the thickness direction of the gasket body 10, the first glue outlet 21c and the second glue outlet 22c may be disposed at intervals in the thickness direction of the gasket body 10, and may be formed by grooves recessed in the front and back surfaces of the gasket body 10, or by through holes disposed in the gasket body 10 at intervals in the thickness direction, so that projections of the discharge ends of the first flow channel 21 and the second flow channel 22 in the thickness direction of the gasket body 10 have partially or completely overlapped regions, and no specific limitation is made here.
In this embodiment, the gasket body 10 may include a base 11 and two flow baffles 12, where the two flow baffles 12 are respectively disposed at two ends of the base 11 and surround the base 11 to form a slurry outlet 10 a; or the gasket body 10 may include a base 11, two flow baffles 12 and at least one middle outlet plate, the two flow baffles 12 are respectively disposed at two ends of the base 11, the at least one middle outlet plate is disposed in the middle of the base 11, and the base 11, the flow baffles 12 and the middle outlet plate surround to form at least two slurry outlets 10 a. Of course, in some other embodiments, the gasket body 10 may also adopt other structures, and is not limited herein.
In this embodiment, different dispensing parameters, such as the width and depth of the dispensing flow channel 20, the width and depth of the dispensing outlet, and the like, may be set to match different dispensing processes.
In the technical scheme of the invention, the double-layer dispensing gasket comprises a gasket body 10 and a dispensing flow passage 20, the dispensing flow passage 20 comprises a first flow passage 21 and a second flow passage 22, the first flow passage 21 and the second flow passage 22 are respectively arranged on the gasket body 10, the discharge end of the first flow passage 21 is a first glue outlet 21c, the discharge end of the second flow passage 22 is a second glue outlet 22c, and the first glue outlet 21c and the second glue outlet 22c are oppositely arranged in the thickness direction of the gasket body 10, so that double-layer dispensing is realized while slurry is coated, two layers of different insulating glue can be coated simultaneously, and the production efficiency is greatly improved.
Referring to fig. 1 to 3, in an embodiment, the gasket body 10 has a front surface and a back surface opposite to each other, the first glue outlet 21c may be opened on the back surface of the gasket body 10, and the second glue outlet 22c may be opened on the front surface of the gasket body 10.
Referring to fig. 1, in the present embodiment, the first flow channel 21 may extend along the width direction of the gasket body 10; the center line of the second flow passage 22 is disposed at an acute angle to the center line of the first flow passage 21. Therefore, the glue inlets of the two flow passages can be separated by a certain distance so as to facilitate glue feeding, and the upper die head can be provided with corresponding glue dispensing holes conveniently, so that the phenomenon that the insulating glue in the upper die head permeates into the other glue dispensing hole to mix materials due to the fact that two glue dispensing holes of the upper die head are too close to each other is avoided.
Further, referring to fig. 2 and 3, the first flow channel 21 may include a first section 211, a second section, a third section 213, and a fourth section that are sequentially communicated from the feeding end to the discharging end, the first section 211 of the first flow channel 21 is disposed on the front surface of the gasket body 10, the second section of the first flow channel 21 is disposed on the back surface of the gasket body 10, the third section 213 of the first flow channel 21 is disposed on the front surface of the gasket body 10, and the fourth section of the first flow channel 21 is disposed on the back surface of the gasket body 10; the second section and the first section 211 of the first flow channel 21, the second section and the third section 213 of the first flow channel 21, and the fourth section and the third section 213 of the first flow channel 21 are respectively communicated through the flanged hole 212 a.
The end of the first section 211 of the first flow channel 21 is provided with a first glue inlet 21a for communicating with a glue dispensing hole of the coating die head.
It can be understood that, the first glue outlet 21c is arranged on the back of the gasket body 10, the second glue outlet 22c can be arranged on the front of the gasket body 10, the first section 211 of the first runner 21 is arranged on the front of the gasket body 10, the second section of the first runner 21 is arranged on the back of the gasket body 10, the third section 213 of the first runner 21 is arranged on the front of the gasket body 10, and the fourth section of the first runner 21 is arranged on the back of the gasket body 10, so that the first runner 21 and the second runner 22 can be filled with different insulating glues at the same die head, and only glue dispensing holes communicated with the upper die head or the lower die head are formed on the upper die head or the lower die head.
In addition, as shown in fig. 3, in the present embodiment, a containing groove 101a for containing the adjusting block may be disposed at a position of the front surface of the gasket body 10 corresponding to the second section of the first flow channel 21. So, greatly promoted space utilization, when realizing double-deck point and gluing, also do not influence the regulation of coating die head thick liquids coating surface density, guaranteed the homogeneity of coating.
Referring to fig. 3, in an embodiment, the second flow channel 22 at least includes a feeding section 221 and a discharging section 222 sequentially communicated from a feeding end to a discharging end thereof, the feeding section 221 and the discharging section 222 of the second flow channel 22 are both opened on the front surface of the gasket body 10, the discharging section 222 of the second flow channel 22 and the fourth section of the first flow channel 21 are oppositely arranged, and projections in the thickness direction of the gasket body 10 are at least partially overlapped, so that two different insulating glues can be stacked in the height direction to meet the quality requirement of double-layer gluing.
Wherein, the end part of the feeding end of the second runner 22 is provided with a second glue inlet 22a for communicating with the glue dispensing hole of the coating die head.
Referring to fig. 1, in an embodiment, the gasket body 10 may include a base 11 and two baffle plates 12, the two baffle plates 12 are respectively disposed on two sides of the base 11 and surround the base 11 to form a slurry outlet 10a, the dispensing flow channel 20 is disposed at an end of the baffle plate 12, and the first glue outlet 21c and the second glue outlet 22c are disposed near the slurry outlet 10 a. Therefore, the insulating glue can be tightly close to the edge of the slurry coating, so that the quality of the pole piece is improved.
Referring to fig. 1, in the embodiment, a holding portion 111 is disposed on the substrate 11 for holding the double-layer dispensing gasket; and/or the substrate 11 is provided with a protrusion 112 for pushing or pulling the double dispensing pad.
Referring to fig. 1, in one embodiment, the base 11 and/or the baffle 12 are provided with mounting holes 10b for bolts to pass through for facilitating the mounting and dismounting of the double-layer dispensing gasket.
The invention also provides a coating die head, which comprises the double-layer dispensing gasket, the specific structure of the double-layer dispensing gasket refers to the embodiments, and the coating die head provided by the invention comprises all the schemes of all the embodiments of the double-layer dispensing gasket, so that the coating die head at least has the same technical effects as the double-layer dispensing gasket, and the technical effects are not explained in the specification.
As shown in fig. 1, in one embodiment of the present invention, the coating die comprises an upper die, a lower die and a double-layer dispensing shim; the upper die head is provided with a first dispensing hole for introducing first insulating glue and a second dispensing hole for introducing second insulating glue; the lower die head is fixedly connected with the upper die head; the double-layer dispensing gasket is clamped between the upper die head and the lower die head and is surrounded to form a coating slit; the first flow channel 21 is communicated with the first dispensing hole, and the second flow channel 22 is communicated with the second dispensing hole.
It can be understood that, because the double-layer dispensing gasket of the coating die head of the present invention includes the gasket body 10 and the dispensing flow passage 20, the dispensing flow passage 20 includes the first flow passage 21 and the second flow passage 22, the first flow passage 21 and the second flow passage 22 are respectively disposed on the gasket body 10, the discharge end of the first flow passage 21 is the first glue outlet 21c, the discharge end of the second flow passage 22 is the second glue outlet 22c, and the first glue outlet 21c and the second glue outlet 22c are oppositely disposed in the thickness direction of the gasket body 10, thereby realizing double-layer dispensing while coating slurry, being capable of coating two layers of different insulating glue at the same time, and greatly improving the production efficiency.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.
Claims (10)
1. A double-layer dispensing gasket, comprising:
a gasket body (10); and
glue dispensing flow channel (20) comprises a first flow channel (21) and a second flow channel (22), wherein the first flow channel (21) and the second flow channel (22) are respectively arranged on the gasket body (10), a discharge end of the first flow channel (21) is a first glue outlet (21c), a discharge end of the second flow channel (22) is a second glue outlet (22c), and the first glue outlet (21c) and the second glue outlet (22c) are oppositely arranged in the thickness direction of the gasket body (10).
2. The double-layer dispensing gasket of claim 1, wherein the first glue outlet (21c) is opened on the back surface of the gasket body (10), and the second glue outlet (22c) is opened on the front surface of the gasket body (10).
3. The double-layer dispensing gasket of claim 2, wherein the first runner (21) comprises a first section (211), a second section, a third section (213) and a fourth section which are sequentially communicated from the feeding end to the discharging end, the first section (211) of the first runner (21) is arranged on the front surface of the gasket body (10), the second section of the first runner (21) is arranged on the back surface of the gasket body (10), the third section (213) of the first runner (21) is arranged on the front surface of the gasket body (10), and the fourth section of the first runner (21) is arranged on the back surface of the gasket body (10);
the second section and the first section (211) of the first flow channel (21), the second section and the third section (213) of the first flow channel (21), and the fourth section and the third section (213) of the first flow channel (21) are respectively communicated through holes (212 a).
4. The double-layer dispensing gasket of claim 3, wherein a receiving groove (101a) for receiving an adjusting block is formed in a position of the front surface of the gasket body (10) corresponding to the second section of the first flow channel (21).
5. The double-layer dispensing gasket of claim 3, wherein the second runner (22) at least comprises a feeding section (221) and a discharging section (222) which are sequentially communicated from a feeding end to a discharging end of the second runner, the feeding section (221) and the discharging section (222) of the second runner (22) are both arranged on the front surface of the gasket body (10), the discharging section (222) of the second runner (22) is arranged opposite to the fourth section of the first runner (21), and the projection of the discharging section and the fourth section in the thickness direction of the gasket body (10) at least partially coincide.
6. The double-layered dispensing gasket as set forth in any one of claims 1-5, wherein said gasket body (10) comprises:
a base (11); and
the two flow baffles (12) are respectively arranged on two sides of the base body (11) and surround the base body (11) to form a slurry outlet (10a), the dispensing flow channel (20) is arranged at the end part of the flow baffles (12), and the first glue outlet (21c) and the second glue outlet (22c) are arranged close to the slurry outlet (10 a).
7. The double-layered dispensing gasket of claim 6, wherein said substrate (11) is provided with a holding portion (111) for holding said double-layered dispensing gasket.
8. The double-layer dispensing pad of claim 6, wherein the substrate (11) is provided with a protrusion (112) for pushing or pulling the double-layer dispensing pad.
9. The double-layer dispensing gasket of claim 6, wherein the base (11) and/or the baffle (12) are provided with mounting holes (10b) for bolts to pass through.
10. A coating die, comprising:
the upper die head is provided with a first dispensing hole for introducing first insulating glue and a second dispensing hole for introducing second insulating glue;
the lower die head is fixedly connected with the upper die head; and
the double-layer dispensing gasket of any one of claims 1 to 9, sandwiched between the upper die and the lower die and enclosing to form a coating slot; the first runner (21) is communicated with the first dispensing hole, and the second runner (22) is communicated with the second dispensing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413725.8A CN114733714B (en) | 2022-04-19 | 2022-04-19 | Double-layer dispensing gasket and coating die head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413725.8A CN114733714B (en) | 2022-04-19 | 2022-04-19 | Double-layer dispensing gasket and coating die head |
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| Publication Number | Publication Date |
|---|---|
| CN114733714A true CN114733714A (en) | 2022-07-12 |
| CN114733714B CN114733714B (en) | 2023-04-28 |
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| CN202210413725.8A Active CN114733714B (en) | 2022-04-19 | 2022-04-19 | Double-layer dispensing gasket and coating die head |
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| WO2024025200A1 (en) * | 2022-07-28 | 2024-02-01 | 주식회사 엘지에너지솔루션 | Slot die coater |
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| CN114733714B (en) | 2023-04-28 |
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