Air floating roller, drying oven and coating equipment

Abstract

The utility model discloses an air floating roller drying oven and coating equipment, an air floating roller comprises an air floating roller bottom plate, an outer roller surface and an inner roller surface, the inner roller surface is provided with an inner roller surface via hole, and the outer roller surface is provided with a straight groove air outlet and an inclined groove air outlet; the drying oven comprises an oven body and a hot air circulation conveying device, and an air floating roller is arranged in the oven body; the coating equipment comprises an air floating roller. According to the air floating roller drying oven and the coating equipment, the pressure difference between the two side positions and the middle position of the air floating roller can be improved through the skewed slot air outlets, the stability of a base material is improved, the base material is prevented from being scraped and broken, the drying uniformity and the coating consistency of a pole piece can be improved, and it is guaranteed that the base material has high surface density consistency.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production and processing, and in particular to an air flotation roller, an oven and a coating equipment. Background Technology

[0002] In lithium battery manufacturing, coating is a crucial step. Current lithium battery coating processes mostly utilize solid rollers to support and transfer the electrodes. This results in significant friction between the electrodes and the rollers, making the coating prone to breakage and impacting production efficiency. Furthermore, during the electrode drying process, the rollers inside the drying oven are heated to a higher temperature than the electrodes due to the ambient oven temperature. The direct contact between the electrodes and the rollers creates a thermal conductivity coefficient on the contact surface that is much higher than on the non-contact surfaces, easily leading to dark marks on the electrodes. If these dark marks are present during subsequent rolling, cracks or even breakage may occur, severely affecting the quality of both the electrodes and the lithium battery.

[0003] To address these issues, air-bearing rollers are used instead of solid rollers in some equipment. However, this also presents other challenges: First, the pressure uniformity of the air-bearing roller surface is inconsistent, tending to be higher in the middle and lower on both sides. This can easily lead to scraping and even electrode breakage when the electrode tension is high. Second, the high air velocity at the air-bearing roller surface causes the electrode to vibrate during transfer, affecting coating uniformity and resulting in defects such as uneven surface density.

[0004] Therefore, the purpose of this utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides an air flotation roller, an oven and a coating equipment, which solves the technical defects of the existing air flotation roller, such as inconsistent roller surface pressure, high roller surface air velocity, easy to cause scraping, electrode breakage, easy to shake, uneven drying, poor coating consistency and uneven surface density.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An air flotation roller includes an air flotation roller base plate and an outer roller surface and an inner roller surface fixed on the air flotation roller base plate. The outer roller surface is disposed outside the inner roller surface. The two ends of the air flotation roller base plate, the inner roller surface and the outer roller surface are respectively provided with a first end sealing plate and a second end sealing plate. The inner roller surface has an inner roller surface through hole that runs through the inside and outside. The outer roller surface has a straight groove air outlet and an inclined groove air outlet along the length direction of the air flotation roller. The inclined groove air outlet is inclined and is inclined towards the direction of the supporting substrate on both sides of the outer roller surface.

[0008] As a further improvement to the above technical solution, a straight groove and an inclined groove are provided on the outer roller surface along the length direction of the air flotation roller. The inclined groove is located on the outer roller surface near both sides. A straight groove bar is provided on the straight groove, and the straight groove bar forms the straight groove air outlet at the straight groove. An inclined groove bar is provided at the inclined groove, and the inclined groove bar forms the inclined groove air outlet at the inclined groove.

[0009] As a further improvement to the above technical solution, a first inclined groove mating strip and a second inclined groove mating strip are respectively provided on both sides of the inclined groove strip. The inclined groove strip is installed in combination with the first inclined groove mating strip and the second inclined groove mating strip at the inclined groove opening. An inclined groove air outlet is provided between one side of the inclined groove strip and the first inclined groove mating strip and between the other side of the inclined groove strip and the second inclined groove mating strip.

[0010] As a further improvement to the above technical solution, the inclined groove strip is provided with a first inclined surface recess and a second inclined surface recess on its two sides respectively. The bottom of the recess of the first inclined surface recess is the first inclined surface, and the bottom of the recess of the second inclined surface recess is the second inclined surface. The first inclined groove mating strip is provided with a first mating inclined surface on its side close to the inclined groove strip. The space between the first mating inclined surface and the first inclined surface forms an inclined groove air outlet. The second inclined groove mating strip is provided with a second mating inclined surface that mates with the second inclined surface on its side close to the inclined groove strip. The space between the second mating inclined surface and the second inclined surface forms another inclined groove air outlet.

[0011] As a further improvement to the above technical solution, a first straight groove recess and a second straight groove recess are respectively provided on both sides of the straight groove strip, and the space between the bottom surface of the first straight groove recess and the second straight groove recess and the inner edge of the straight groove opening forms the straight groove air outlet.

[0012] As a further improvement to the above technical solution, the outer surface of the straight groove bar is lower than the outer surface of the outer roller surface.

[0013] As a further improvement to the above technical solution, both the outer roller surface and the inner roller surface are semi-cylindrical roller surfaces. The space inside the inner roller surface is the air-float roller cavity, and the space between the outer wall of the inner roller surface and the inner wall of the outer roller surface is the air-float roller outer cavity. The inner roller surface has multiple through holes that are evenly distributed on the inner roller surface. The air-float roller cavity is connected to the air-float roller outer cavity through the through holes in the inner roller surface. The first end sealing plate is provided with a first end connection hole, and the second end sealing plate is provided with a second end connection hole. Both the first end connection hole and the second end connection hole are connected to the air-float roller cavity.

[0014] As a further improvement to the above technical solution, the first inclined groove mating strip and the second inclined groove mating strip are fixedly connected to the inclined groove strip by connecting bolts, and the two ends of the inclined groove strip are fixedly connected to the outer roller surface by inclined groove strip fixing bolts;

[0015] And / or, the two ends of the straight groove bar are fixedly connected to the outer roller surface by straight groove bar fixing bolts;

[0016] And / or, the outer roller surface, inner roller surface, air flotation roller bottom plate, first end sealing plate and second end sealing plate are fixedly connected by roller body connecting bolts, and the outer roller surface, first end sealing plate and second end sealing plate are provided with bottom sealing strips at their connection with the air flotation roller bottom plate, and end sealing strips are provided at the connection between the two ends of the outer roller surface and the first end sealing plate and the second end sealing plate.

[0017] This utility model also provides:

[0018] An oven is provided, the oven including a box body and a hot air circulation conveying device, wherein a plurality of air flotation rollers are arranged inside the box body, and the air flotation rollers convey hot air through the hot air circulation conveying device.

[0019] This utility model also provides:

[0020] A coating apparatus, the coating apparatus comprising the aforementioned air flotation roller.

[0021] The beneficial effects of this utility model are as follows: This utility model provides an air flotation roller, an oven, and a coating equipment. The air flotation roller, oven, and coating equipment have straight and inclined grooves on the outer roller surface. Inclined air outlets are provided on the inclined grooves, which are inclined towards both sides of the air flotation roller surface and towards the direction supporting the substrate on both sides of the air flotation roller. Through the inclined air outlets, the edge air flotation support force on both sides of the air flotation roller can be supplemented, reducing the difference between the support force on both sides of the air flotation roller and the air flotation support force in the middle of the air flotation roller. This avoids scraping or breaking of the substrate when it passes through the air flotation roller, improving the stability of the substrate when passing through the air flotation roller. It also helps to improve the uniformity of drying of the electrode sheets in the oven and the consistency of coating in the coating equipment, ensuring high surface density consistency of the substrate, improving coating quality and drying quality, and further improving product quality.

[0022] In summary, this type of air flotation roller, drying oven, and coating equipment solves the technical defects of existing air flotation rollers, such as inconsistent roller surface pressure, high roller surface air velocity, easy scraping, electrode breakage, easy shaking, uneven drying, poor coating consistency, and uneven surface density. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is an assembly diagram of the present invention;

[0025] Figure 2 This is another assembly diagram of this utility model;

[0026] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0027] Figure 4 This is a magnified view of part B in color 3;

[0028] Figure 5 This is an assembly diagram of the present invention after disassembling the straight groove bar, the inclined groove bar, the first inclined groove mating bar, the second inclined groove mating bar, and the first end sealing plate;

[0029] Figure 6 This is a schematic diagram of the inclined groove bar in this utility model;

[0030] Figure 7 yes Figure 6 A magnified view of part C;

[0031] Figure 8 This is a structural schematic diagram of the straight groove bar in this utility model;

[0032] Figure 9 yes Figure 8 A magnified view of part of D. Detailed Implementation

[0033] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other, as described above. Figure 1-9 .

[0034] Specific reference Figure 1 , Figure 3 , Figure 4 and Figure 5 This utility model provides:

[0035] An air-float roller includes an air-float roller base plate 33 and an outer roller surface 1 and an inner roller surface 2 fixed on the air-float roller base plate 33. The outer roller surface 1 is disposed outside the inner roller surface 2. The air-float roller base plate 33, the inner roller surface 2 and the outer roller surface 1 are respectively provided with a first end sealing plate 31 and a second end sealing plate 32 at both ends. The space inside the inner roller surface 2 is the air-float roller inner cavity 20. The space between the outer wall of the inner roller surface 2 and the inner wall of the outer roller surface 1 is the air-float roller outer cavity 10. The inner roller surface has multiple through holes 21 that are evenly distributed on the inner roller surface 2. The air-float roller inner cavity 20 is connected to the air-float roller outer cavity 10 through the inner roller surface through holes 21. The first end sealing plate 31 is provided with a first end connecting hole 311 and the second end sealing plate 32 is provided with a second end connecting hole 321. Both the first end connecting hole 311 and the second end connecting hole 321 are connected to the air-float roller inner cavity 20.

[0036] In practical applications, the first end connection hole 311 and / or the second end connection hole 321 are connected to the hot air circulation conveying device, and hot air is sent into the inner cavity 20 of the air flotation roller from one or both ends of the air flotation roller. The hot air enters the outer cavity 10 of the air flotation roller through the inner roller surface through the through hole 21. Furthermore, the hot air entering the outer cavity 10 of the air flotation roller will flow out to the external space of the air flotation roller through the air outlet of the outer roller surface, thereby achieving the function of air flotation support for the substrate.

[0037] Reference body 4 Figure 5 In this embodiment, both the outer roller surface 1 and the inner roller surface 2 are semi-cylindrical roller surfaces. The outer roller surface 1 can be formed by cutting a metal tube, and the inner roller surface 2 can be formed by bending sheet metal or drilling a metal tube. In other embodiments, other existing processing methods can also be selected as needed to process the outer roller surface 1 and the inner roller surface 2.

[0038] Additionally, refer to Figure 1 , Figure 3 The outer roller surface 1, inner roller surface 2, air flotation roller base plate 33, first end sealing plate 31, and second end sealing plate 32 are fixedly connected by roller body connecting bolts. Bottom sealing strips 61 are provided at the connection points of the outer roller surface 1, first end sealing plate 31, and second end sealing plate 32 with the air flotation roller base plate 33. End sealing strips 62 are also provided at the connection points between both ends of the outer roller surface 1 and the first end sealing plate 31 and second end sealing plate 32. The bottom sealing strips 61 and end sealing strips 62 ensure the sealing performance of the air flotation roller, guaranteeing its stable performance and quality of use.

[0039] Furthermore, refer to Figure 1 , Figure 3 , Figure 4 and Figure 5The inner roller surface 2 has an inner roller surface through hole 21 that runs through both the inner and outer sides. The outer roller surface 1 has a straight groove 11 and an inclined groove 12 along the length of the air float roller. The inclined groove 12 is located on the outer roller surface 1 near both sides. The straight groove 11 is provided with a straight groove bar 4. The straight groove bar 4 forms a straight groove air outlet 111 at the straight groove 11. The inclined groove 12 is provided with an inclined groove bar 51. The inclined groove bar 51 forms an inclined groove air outlet 121 at the inclined groove 12. The inclined groove air outlet 121 is inclined and is inclined towards the direction of the supporting substrate on both sides of the outer roller surface 1.

[0040] Reference Figure 1 , Figure 3 , Figure 4 In this embodiment, the outer surface of the straight groove bar 4 is lower than the outer surface of the outer roller surface 1. Setting the outer surface of the straight groove bar 4 to be lower than the outer surface of the outer roller surface 1 can form a return air cavity in the space below the outer roller surface 1, which helps to convert the dynamic pressure of the air coming out of the roller surface into static pressure, reduce the wind speed, and help improve the uneven pressure on the substrate.

[0041] In this invention, the straight groove air outlet 111 is roughly distributed along the radial direction of the air flotation roller, and mainly serves as an air flotation support in the middle position of the air flotation roller. The inclined groove air outlet 121 is set on both sides to compensate for the air flotation support force on both sides of the air flotation roller, so that the difference between the support force on both sides of the air flotation roller and the air flotation support force in the middle position of the air flotation roller is reduced, avoiding the substrate from being scraped or broken when passing through the air flotation roller, improving the stability of the substrate when passing through the air flotation roller, which is conducive to improving the drying uniformity of the electrode sheets in the drying oven and the coating consistency of the coating equipment, ensuring that the substrate has a high surface density consistency, improving the coating quality and drying quality, and further improving the product quality.

[0042] Furthermore, refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 The inclined groove strip 51 is provided with a first inclined groove mating strip 52 and a second inclined groove mating strip 53 on both sides. The inclined groove strip 51 is installed in combination with the first inclined groove mating strip 52 and the second inclined groove mating strip 53 at the inclined groove opening 12. The inclined groove air outlet 121 is provided between one side of the inclined groove strip 51 and the first inclined groove mating strip 52 and between the other side of the inclined groove strip 51 and the second inclined groove mating strip 53.

[0043] In this embodiment, a slanted groove 12 is formed on each side of the outer roller surface 1. Each slanted groove 12 is equipped with a slanted groove strip 51, a first slanted groove mating strip 52, and a second slanted groove mating strip 53. Each slanted groove 12 has two slanted groove air outlets 121. In other embodiments, if necessary, more than one slanted groove 12 can be formed on both sides of the outer roller surface 1. Each slanted groove 12 can also be equipped with multiple slanted groove strips 51, multiple first slanted groove mating strips 52, and multiple second slanted groove mating strips 53, forming more than three slanted groove air outlets. The specific configuration can be determined according to implementation requirements.

[0044] Reference Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 Because directly machining the inclined surface on the outer roller surface 1 is difficult and costly, in this embodiment, by setting an inclined groove strip 51, a first inclined groove mating strip 52, and a second inclined groove mating strip 53 at the inclined groove opening 12, and forming the inclined groove outlet 121 by the cooperation of the inclined groove strip 51, the first inclined groove mating strip 52, and the second inclined groove mating strip 53, not only is the machining difficulty reduced and the machining efficiency improved, but also, in practical applications, mating strips with different inclined groove angles can be replaced according to different working conditions, thereby improving the versatility and flexibility of the air bearing roller.

[0045] In this embodiment, the inclined groove strip 51 is provided with a first inclined surface recess 511 and a second inclined surface recess 512 on its two sides respectively. The bottom of the recess of the first inclined surface recess 511 is the first inclined surface 513, and the bottom of the recess of the second inclined surface recess 512 is the second inclined surface 514. The first inclined groove mating strip 52 is provided with a first mating inclined surface 521 on its side near the inclined groove strip 51. The space between the first mating inclined surface 521 and the first inclined surface 513 forms an inclined groove air outlet 121. The second inclined groove mating strip 53 is provided with a second mating inclined surface 531 that mates with the second inclined surface 514 on its side near the inclined groove strip 51. The space between the second mating inclined surface 531 and the second inclined surface 514 forms another inclined groove air outlet 121.

[0046] Reference Figure 3 , Figure 8 , Figure 9 In this embodiment, a first straight groove recess 41 and a second straight groove recess 42 are respectively provided on both sides of the straight groove strip 4. The space between the bottom surface of the first straight groove recess 41 and the second straight groove recess 42 and the inner edge of the straight groove opening 11 forms the straight groove air outlet 111.

[0047] Reference Figure 1 , Figure 3 , Figure 4When implementing this technical solution, since the straight groove air outlet 111 is relatively small in size, directly machining the straight groove air outlet 111 on the outer roller surface 1 requires high machining accuracy, is difficult to machine, and has high machining costs. Therefore, in this embodiment, a straight groove 11 is opened on the outer roller surface and a straight groove strip 4 is set at the straight groove 11 to finally form the straight groove air outlet 111, which can significantly reduce the machining difficulty and improve the machining efficiency.

[0048] The first inclined groove mating strip 52 and the second inclined groove mating strip 53 are fixedly connected to the inclined groove strip 51 by connecting bolts 54. The two ends of the inclined groove strip 51 are fixedly connected to the outer roller surface 1 by inclined groove strip fixing bolts 55. The two ends of the straight groove strip 4 are fixedly connected to the outer roller surface 1 by straight groove strip fixing bolts 43. The ends of the inclined groove strip 5 and the straight groove strip 4 are provided with screw holes. By connecting bolts through the screw holes to the preset fixing screw holes on the outer roller surface 1, the inclined groove strip 5 and the straight groove strip 4 can be fixed at the corresponding positions on the outer roller surface 1.

[0049] Based on the aforementioned air flotation roller, this utility model also provides:

[0050] An oven includes a chamber and a hot air circulation conveying device. A plurality of air-floating rollers are arranged inside the chamber, and hot air is conveyed to the air-floating rollers via the hot air circulation conveying device. The chamber has an inlet and an outlet. The substrate container enters the chamber through the inlet, is dried inside the chamber, and then flows out through the outlet. This type of air-floating roller improves the stability of the substrate during drying, ensures consistent drying, and enhances the drying quality.

[0051] Based on the aforementioned air flotation roller, this utility model also provides:

[0052] A coating apparatus includes the aforementioned air-floating roller. This air-floating roller improves the stability of the substrate during coating, prevents substrate movement during coating, enhances coating consistency and surface density uniformity, and significantly improves coating quality.

[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An air flotation roller, characterized in that: The device includes an air-float roller base plate (33) and an outer roller surface (1) and an inner roller surface (2) fixed on the air-float roller base plate (33). The outer roller surface (1) is located outside the inner roller surface (2). The air-float roller base plate (33), the inner roller surface (2) and the outer roller surface (1) are respectively provided with a first end sealing plate (31) and a second end sealing plate (32). The inner roller surface (2) is provided with an inner roller surface through hole (21) that runs through the inner and outer sides. The outer roller surface (1) is provided with a straight groove air outlet (111) and an inclined groove air outlet (121) along the length direction of the air-float roller. The inclined groove air outlet (121) is inclined and is inclined towards the direction of the supporting substrate on both sides of the outer roller surface (1).

2. The air flotation roller according to claim 1, characterized in that: The outer roller surface (1) is provided with a straight groove (11) and an inclined groove (12) along the length of the air-bearing roller. The inclined groove (12) is located on the outer roller surface (1) near both sides. A straight groove bar (4) is provided on the straight groove (11). The straight groove bar (4) forms the straight groove outlet (111) at the straight groove (11). An inclined groove bar (51) is provided at the inclined groove (12). The inclined groove bar (51) forms the inclined groove outlet (121) at the inclined groove (12).

3. The air flotation roller according to claim 2, characterized in that: The inclined groove strip (51) is provided with a first inclined groove mating strip (52) and a second inclined groove mating strip (53) on both sides respectively. The inclined groove strip (51) is installed in combination with the first inclined groove mating strip (52) and the second inclined groove mating strip (53) at the inclined groove opening (12). The inclined groove outlet (121) is provided between one side of the inclined groove strip (51) and the first inclined groove mating strip (52) and between the other side of the inclined groove strip (51) and the second inclined groove mating strip (53).

4. The air flotation roller according to claim 3, characterized in that: The inclined groove strip (51) has a first inclined surface recess (511) and a second inclined surface recess (512) on its two sides respectively. The bottom of the recess of the first inclined surface recess (511) is the first inclined surface (513), and the bottom of the recess of the second inclined surface recess (512) is the second inclined surface (514). The first inclined groove mating strip (52) has a first mating inclined surface (521) on its side close to the inclined groove strip (51). The space between the first mating inclined surface (521) and the first inclined surface (513) forms an inclined groove air outlet (121). The second inclined groove mating strip (53) has a second mating inclined surface (531) on its side close to the inclined groove strip (51) that mates with the second inclined surface (514). The space between the second mating inclined surface (531) and the second inclined surface (514) forms another inclined groove air outlet (121).

5. An air-floating roller according to claim 3, characterized in that: The straight groove strip (4) has a first straight groove recess (41) and a second straight groove recess (42) on both sides respectively. The space between the bottom surface of the first straight groove recess (41) and the second straight groove recess (42) and the inner edge of the straight groove opening (11) forms the straight groove air outlet (111).

6. The air flotation roller according to claim 3, characterized in that: The outer surface of the straight groove bar (4) is lower than the outer surface of the outer roller surface (1).

7. An air flotation roller according to any one of claims 3-6, characterized in that: Both the outer roller surface (1) and the inner roller surface (2) are semi-cylindrical roller surfaces. The space inside the inner roller surface (2) is the air-floating roller cavity (20). The space between the outer wall of the inner roller surface (2) and the inner wall of the outer roller surface (1) is the air-floating roller cavity (10). The inner roller surface has multiple through holes (21) that are evenly distributed on the inner roller surface (2). The air-floating roller cavity (20) is connected to the air-floating roller cavity (10) through the inner roller surface through holes (21). The first end sealing plate (31) is provided with a first end connection hole (311), and the second end sealing plate (32) is provided with a second end connection hole (321). Both the first end connection hole (311) and the second end connection hole (321) are connected to the air-floating roller cavity (20).

8. The air flotation roller according to claim 7, characterized in that: The first inclined groove mating strip (52) and the second inclined groove mating strip (53) are fixedly connected to the inclined groove strip (51) by connecting bolts (54), and the two ends of the inclined groove strip (51) are fixedly connected to the outer roller surface (1) by inclined groove strip fixing bolts (55); And / or, the two ends of the straight groove bar (4) are fixedly connected to the outer roller surface (1) by straight groove bar fixing bolts (43); And / or, the outer roller surface (1), inner roller surface (2), air flotation roller base plate (33), first end sealing plate (31) and second end sealing plate (32) are fixedly connected by roller body connecting bolts. The outer roller surface (1), first end sealing plate (31) and second end sealing plate (32) are provided with bottom sealing strips (61) at their connection with the air flotation roller base plate (33). End sealing strips (62) are provided at the connection between the two ends of the outer roller surface (1) and the first end sealing plate (31) and the second end sealing plate (32).

9. An oven, characterized in that: The oven includes a box body and a hot air circulation conveying device. The box body is provided with a plurality of air flotation rollers as described in any one of claims 1-8. The air flotation rollers convey hot air through the hot air circulation conveying device.

10. A coating apparatus, characterized in that: The coating equipment includes the air flotation roller as described in any one of claims 1-8.

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