Air floatation device and coating die head

Abstract

The utility model provides an air flotation device and a coating die head, and belongs to the technical field of coating machines and coating machine accessories, the air flotation device comprises a mounting plate, an air outlet plate and a pressure equalizing plate, and the mounting plate is provided with a mounting cavity and an air inlet channel; the air outlet plate is arranged in the mounting cavity, and a plurality of uniformly distributed air outlet holes are formed in the air outlet plate; the pressure equalizing plate is arranged between the air outlet plate and the mounting cavity, a first pressure equalizing cavity is formed between the pressure equalizing plate and the mounting cavity, a second pressure equalizing cavity is formed between the pressure equalizing plate and the air outlet plate, a plurality of uniformly distributed via holes are formed in the pressure equalizing plate, and the density of the via holes is smaller than that of the air outlet holes; the air inlet channel communicates with the first pressure equalizing cavity, and airflow entering from the air inlet channel sequentially passes through the first pressure equalizing cavity, the via hole and the second pressure equalizing cavity and then is sent out from the air outlet hole. According to the air floatation device provided by the utility model, air flow is subjected to two times of pressure equalizing processes to generate upward stable and uniformly distributed force, so that the foil to be coated can stably float under the action of the air floatation device.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines and coating machine accessories, in particular to an air flotation device and a coating die head. Background Art

[0002] Slot extrusion coating is a precise wet coating technology. Its working principle is that the slurry is extruded and sprayed along the slit of the coating die under a certain pressure and flow rate and transferred to the substrate. Compared with other coating methods, it has many advantages, such as fast coating speed, high precision and uniform wet thickness.

[0003] Kiss coating is a method of coating the foil with the lip of the coating die facing upwards. No back roller support is set behind the foil. In order to prevent the lip of the coating die from scratching or wearing the foil and the lip of the die, a non-contact air flotation plate is currently used to support the foil.

[0004] An existing air flotation plate is provided with an air inlet channel and multiple air holes, and the air flow is sent out after passing through the air inlet channel and the air holes to lift the foil without contact. However, the air flow is directly sent out through the final air hole after passing through the air inlet channel, which easily causes uneven air pressure distribution and affects the stability of the foil. Utility Model Content

[0005] Therefore, the utility model aims to solve the defect in the prior art that the air pressure delivered by the air flotation plate is unevenly distributed, which affects the stability of the foil, thereby providing an air flotation device and a coating die head.

[0006] In order to solve the above technical problems, the utility model provides an air flotation device, comprising:

[0007] A mounting plate having a mounting cavity and an air intake passage;

[0008] An air outlet plate is arranged in the installation cavity, and the air outlet plate has a plurality of air outlet holes evenly arranged;

[0009] A pressure equalizing plate is arranged between the outlet plate and the installation cavity, a first pressure equalizing cavity is formed between the pressure equalizing plate and the installation cavity, a second pressure equalizing cavity is formed between the pressure equalizing plate and the outlet plate, the pressure equalizing plate has a plurality of evenly distributed through holes, and the density of the through holes is less than the density of the outlet holes;

[0010] The air inlet channel is communicated with the first pressure equalizing chamber, and the airflow entering from the air inlet channel passes through the first pressure equalizing chamber, the via hole, and the second pressure equalizing chamber in sequence before being sent out from the air outlet.

[0011] Optionally, a diameter of the via hole is larger than a diameter of the air outlet hole.

[0012] Optionally, there are multiple air inlet channels, which are evenly distributed on the mounting plate.

[0013] Optionally, it also includes:

[0014] A mounting block is arranged on the mounting plate, wherein the mounting block has an air inlet, the air inlet corresponds to the air inlet passage one by one, and the diameter of the air inlet is greater than the diameter of the air inlet passage.

[0015] Optionally, sealing members are provided between the air outlet plate and the mounting cavity, between the pressure equalizing plate and the mounting cavity, and between the mounting block and the mounting plate.

[0016] Optionally, the thickness of the air outlet plate is greater than the thickness of the pressure equalizing plate.

[0017] The utility model also provides a coating die head, comprising a die head body and any one of the above-mentioned air flotation devices, wherein the air flotation device is arranged on the die head body, and the air outlet of the air flotation device faces the foil material to be coated.

[0018] Optionally, the die body comprises an upper die and a lower die, the upper die or the lower die is provided with a mounting groove, and the air flotation device is arranged in the mounting groove.

[0019] Optionally, it also includes:

[0020] A moving component is arranged on the die body, and the moving component is connected to the air flotation device to adjust the distance between the air outlet of the air flotation device and the foil to be coated.

[0021] Optionally, there are two moving components, and the two moving components are respectively connected to two ends of the air flotation device.

[0022] The technical solution of the utility model has the following advantages:

[0023] 1. The air flotation device provided by the utility model comprises a mounting plate, an air outlet plate and a pressure equalizing plate, the mounting plate has a mounting cavity and an air inlet channel, the air outlet plate and the pressure equalizing plate are arranged in the mounting cavity, the air outlet plate has an air outlet hole, the pressure equalizing plate has a through hole, a first pressure equalizing cavity is formed between the pressure equalizing plate and the mounting cavity, a second pressure equalizing cavity is formed between the pressure equalizing plate and the air outlet plate, the air flow passes through the air inlet channel, the first pressure equalizing cavity, the through hole, the second pressure equalizing cavity and the air outlet hole in sequence, and the density of the through hole is less than the density of the air outlet hole;

[0024] Through the setting of the first pressure equalizing chamber and the second pressure equalizing chamber, and the setting of the through hole and the air outlet, the air flow undergoes two pressure equalizing processes. The air pressure is evenly distributed for the first time during the process of the air flow passing through the through hole from the first pressure equalizing chamber, and the air pressure is evenly distributed again during the process of the air flow passing through the air outlet from the second pressure equalizing chamber. The density of the through hole is smaller than that of the air outlet, and the density of the air outlet is large, which ensures the pressure equalizing effect and generates a stable and evenly distributed upward force, so that the foil to be coated can float stably under the action of the air flotation device, providing a stable suspension force, flattening the foil, and reducing the shaking of the foil.

[0025] 2. In the air flotation device provided by the utility model, the diameter of the through hole is larger than the diameter of the air outlet hole. When the air flow passes through the air outlet hole, the air flow speed is increased, and sufficient supporting force is guaranteed while the air flow is stable.

[0026] 3. The air flotation device provided by the utility model has multiple air inlet channels, which are evenly distributed on the mounting plate, so that the air pressure enters the first pressure equalizing cavity more evenly, can fill the cavity more quickly, and improves the subsequent pressure equalizing effect.

[0027] 4. The air flotation device provided by the utility model also includes a mounting block, which has an air inlet. The diameter of the air inlet is larger than the diameter of the air inlet channel, so that the airflow from the air inlet passes through the air inlet channel more smoothly.

[0028] 5. In the air flotation device provided by the utility model, the thickness of the air outlet plate is smaller than the thickness of the pressure equalizing plate, and the airflow flows over a longer distance in the air outlet plate, further improving the stability of the airflow.

[0029] 6. The coating die provided by the utility model includes a die body and an air flotation device arranged on the die body. Through the arrangement of the air flotation device, the lip of the die body will not directly contact the foil to be coated, thereby avoiding scratches or wear of the die lip by the foil during the coating process, improving the quality of the electrode and the service life of the die, and adopting the above-mentioned air flotation device, so any one of the advantages described above can be realized.

[0030] 7. The coating die head provided by the utility model has a mounting groove on the upper die head or the lower die head, which facilitates the installation of the air flotation device and saves space.

[0031] 8. The coating die head provided by the utility model also includes a moving component, which is used to adjust the distance between the air outlet of the air flotation device and the foil to be coated. It can be adjusted accordingly according to the actual coating situation and has high adaptability.

[0032] 9. The coating die head provided by the utility model has two moving components, and the two moving components are respectively connected to the two ends of the air flotation device, thereby ensuring the overall synchronous movement of the air flotation device and further ensuring the coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of an implementation of an air flotation device provided in an embodiment of the utility model;

[0035] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of;

[0036] Figure 3 A schematic structural diagram of an implementation mode of a coating die head provided in an embodiment of the utility model;

[0037] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure.

[0038] Description of reference numerals:

[0039] 1. Mounting plate; 2. Air inlet channel; 3. Air outlet plate; 4. Air outlet hole; 5. Pressure equalizing plate; 6. First pressure equalizing chamber; 7. Second pressure equalizing chamber; 8. Through hole; 9. Mounting block; 10. Air inlet; 11. Die body; 12. Foil to be coated; 13. Moving assembly; 14. Upper die; 15. Lower die; 16. Mounting groove; 17. Boss. DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] The air flotation device provided in this embodiment is used in a coating die head to achieve contactless support for the foil to be coated during kiss coating, and the air flow is used to lift the foil to a height of 0.005-0.5 mm from the lip. The foil does not directly contact the lip, thereby preventing the foil and the die head lip from being scratched or worn.

[0045] like Figure 1 and Figure 2 As shown, a specific implementation of the flotation device provided in this embodiment includes a mounting plate 1, an air outlet plate 3 and a pressure equalizing plate 5, the mounting plate 1 having a mounting cavity and an air inlet channel 2; the air outlet plate 3 is arranged in the mounting cavity, and the air outlet plate 3 has a plurality of evenly distributed air outlet holes 4; the pressure equalizing plate 5 is arranged between the air outlet plate 3 and the mounting cavity, a first pressure equalizing cavity 6 is formed between the pressure equalizing plate 5 and the mounting cavity, a second pressure equalizing cavity 7 is formed between the pressure equalizing plate 5 and the air outlet plate 3, the pressure equalizing plate 5 has a plurality of evenly distributed through holes 8, and the density of the through holes 8 is less than the density of the air outlet holes 4; the air inlet channel 2 is connected to the first pressure equalizing cavity 6, and the airflow entering from the air inlet channel 2 passes through the first pressure equalizing cavity 6, the through holes 8, and the second pressure equalizing cavity 7 in sequence and is then delivered from the air outlet hole 4.

[0046] Through the setting of the first pressure equalizing chamber 6 and the second pressure equalizing chamber 7, and the setting of the through hole 8 and the air outlet 4, the air flow undergoes two pressure equalizing processes. The air flow passes through the through hole 8 from the first pressure equalizing chamber 6 to perform the first uniform distribution of air pressure, and then passes through the air outlet 4 from the second pressure equalizing chamber 7 to perform the air pressure uniform distribution again. The density of the through hole 8 is less than the density of the air outlet 4, and the density of the air outlet 4 is large, which ensures the pressure equalizing effect and generates a stable and evenly distributed upward force, so that the foil to be coated can float stably under the action of the air flotation device, providing a stable suspension force, which can flatten the foil and reduce the shaking of the foil.

[0047] Specifically, the mounting plate 1 is a rectangular structure, the mounting cavity is a top-opening structure, and a boss 17 is arranged at the bottom edge of the mounting cavity, and the boss 17 is used to install the pressure equalizing plate 5, and the pressure equalizing plate 5 is placed on the boss 17 and fixedly connected to the boss 17 by screws or the like. At this time, a first pressure equalizing cavity 6 is formed between the pressure equalizing plate 5 and the bottom of the mounting cavity, and the first pressure equalizing cavity 6 is a rectangular structure, and the air outlet plate 3 is arranged in the mounting cavity and on the outside of the pressure equalizing plate 5, and a second pressure equalizing cavity 7 is formed between the air outlet plate 3 and the pressure equalizing plate 5, and the cross-sectional size of the second pressure equalizing cavity 7 is larger than the cross-sectional size of the first pressure equalizing cavity 6; the through hole 8 is vertically arranged on the pressure equalizing plate 5, and the air outlet hole 4 is vertically arranged on the air outlet plate 3. In addition, the direction of the air outlet hole 4 can also be set at an angle according to the actual need to support the foil.

[0048] In a specific implementation of the air outlet plate 3, the air outlet plate 3 is a microporous plate, and the material of the air outlet plate 3 is foam silicone material, which is convenient for setting the air outlet holes 4 with a relatively large density.

[0049] A specific implementation of the air intake channel 2, the axial direction of the air intake channel 2 is perpendicular to the side wall of the first pressure equalizing chamber 6, which is convenient for the air flow to enter and fill, and can quickly reach a stable state; the cross-section of the air intake channel 2 can be a circular structure or a waist-shaped structure.

[0050] Specifically, the via holes 8 and the air outlet holes 4 are evenly distributed in a rectangular array.

[0051] like Figure 1 and Figure 2 As shown, in the air flotation device provided in this embodiment, the diameter of the through hole 8 is larger than the diameter of the air outlet 4. When the airflow passes through the air outlet 4, the airflow speed is increased, and sufficient supporting force is ensured while the airflow is stable.

[0052] like Figure 1 As shown, the air flotation device provided in this embodiment has multiple air inlet channels 2, which are evenly distributed on the mounting plate 1, so that the air pressure enters the first pressure equalizing chamber more evenly, can fill the chamber more quickly, and improves the subsequent pressure equalizing effect.

[0053] In a specific implementation of the air intake channel 2 , there are five air intake channels 2 , which are arranged on one side wall of the mounting plate 1 . In addition, as an alternative implementation, the air intake channels 2 can also be arranged on both opposite side walls of the mounting plate 1 .

[0054] like Figure 1 and Figure 2 As shown, the flotation device provided in this embodiment also includes a mounting block 9, which is arranged on the mounting plate 1, and the mounting block 9 has an air inlet 10, and the air inlet 10 corresponds one-to-one with the air inlet channel 2. The diameter of the air inlet 10 is larger than the diameter of the air inlet channel 2, so that the airflow from the air inlet 10 passes through the air inlet channel 2 more smoothly.

[0055] In addition, as an alternative implementation, the mounting block 9 may not be provided, and the air intake passage 2 may be directly connected to the air source, so that air is directly taken in from the outer end of the air intake passage 2 .

[0056] In the air flotation device provided in this embodiment, seals are provided between the air outlet plate 3 and the mounting cavity, between the pressure equalizing plate 5 and the mounting cavity, and between the mounting block 9 and the mounting plate 1. The seals are provided to prevent the airflow from leaking out from the edge and affecting the pressure of the airflow. Specifically, the seals are sealing pads or sealing strips.

[0057] like Figure 2 As shown, in the air flotation device provided in this embodiment, the thickness of the air outlet plate 3 is greater than the thickness of the pressure equalizing plate 5, and the airflow flows over a longer distance in the air outlet plate 3, further improving the stability of the airflow.

[0058] like Figure 3 and Figure 4 As shown, this embodiment also provides a coating die, including a die body 11 and an air flotation device described in any one of the above embodiments, wherein the air flotation device is arranged on the die body 11, and the air outlet 4 of the air flotation device faces the foil to be coated 12. By setting the air flotation device, the lip of the die body 11 will not directly contact the foil to be coated 12, thereby avoiding scratches or wear on the die lip caused by the foil during the coating process, improving the quality of the electrode piece and the service life of the die, and adopting the above air flotation device, so any one of the advantages described in the above air flotation device is specifically achieved.

[0059] like Figure 3 and Figure 4 As shown, the coating die provided in this embodiment, the die body 11 includes an upper die 14 and a lower die 15, the upper die 14 or the lower die 15 is provided with a mounting groove 16, and the air flotation device is arranged in the mounting groove 16. The arrangement of the mounting groove 16 on the upper die 14 or the lower die 15 facilitates the installation of the air flotation device and saves space.

[0060] like Figure 3 As shown, the coating die head provided in this embodiment further includes a moving component 13, which is arranged on the die head body 11, and is connected to the air flotation device to adjust the distance between the air outlet 4 of the air flotation device and the foil to be coated 12, and can be adjusted accordingly according to the actual coating situation, with high adaptability. Specifically, the moving component 13 is a linear slide module, and can also be a screw lifting structure or an electric cylinder.

[0061] like Figure 3 As shown, the coating die head provided in this embodiment has two moving components 13, and the two moving components 13 are respectively connected to the two ends of the air flotation device, thereby ensuring the overall synchronous movement of the air flotation device and further ensuring the coating effect.

[0062] Working process of the coating die head: gas with the same air pressure is introduced into multiple air inlets 10, and the air pressure is evenly distributed on the entire air outlet plate 3 after passing through the pressure equalizing plate 5 and the air outlet plate 3. The entire air flotation device forms a stable and evenly distributed lifting force, realizing non-contact and stable suspension of the foil.

[0063] It not only avoids scratches or wear on the foil and the die lip, improves the quality of the pole piece and the service life of the die, but also flattens the foil and reduces foil vibration. According to the actual situation of on-site coating, the height of the air flotation device from the foil can be adjusted by moving the component 13 to achieve different coating effects.

[0064] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. An air flotation device, characterized in that: include: A mounting plate (1) having a mounting cavity and an air inlet passage (2); An air outlet plate (3) is arranged in the installation cavity, and the air outlet plate (3) has a plurality of air outlet holes (4) evenly distributed; A pressure equalizing plate (5) is arranged between the outlet plate (3) and the installation cavity, a first pressure equalizing cavity (6) is formed between the pressure equalizing plate (5) and the installation cavity, a second pressure equalizing cavity (7) is formed between the pressure equalizing plate (5) and the outlet plate (3), the pressure equalizing plate (5) has a plurality of evenly distributed through holes (8), and the density of the through holes (8) is less than the density of the outlet holes (4); The air inlet channel (2) is connected to the first pressure equalizing chamber (6), and the airflow entering from the air inlet channel (2) passes through the first pressure equalizing chamber (6), the through hole (8), and the second pressure equalizing chamber (7) in sequence before being discharged from the air outlet (4).

2. The air flotation device according to claim 1, characterized in that: The diameter of the through hole (8) is greater than the diameter of the air outlet hole (4).

3. The air flotation device according to claim 1, characterized in that: The air intake passages (2) are multiple and are evenly distributed on the mounting plate (1).

4. The air flotation device according to claim 3, characterized in that: Also includes: A mounting block (9) is arranged on the mounting plate (1), the mounting block (9) having an air inlet (10), the air inlet (10) corresponding one-to-one to the air inlet channel (2), and the diameter of the air inlet (10) is greater than the diameter of the air inlet channel (2).

5. The air flotation device according to claim 4, characterized in that: Sealing elements are provided between the air outlet plate (3) and the mounting cavity, between the pressure equalizing plate (5) and the mounting cavity, and between the mounting block (9) and the mounting plate (1).

6. The air flotation device according to any one of claims 1 to 5, characterized in that: The thickness of the air outlet plate (3) is greater than the thickness of the pressure equalizing plate (5).

7. A coating die head, characterized in that: It comprises a die body (11) and an air flotation device according to any one of claims 1 to 6, wherein the air flotation device is arranged on the die body (11), and the air outlet (4) of the air flotation device faces the foil (12) to be coated.

8. The coating die head according to claim 7, characterized in that: The die body (11) comprises an upper die (14) and a lower die (15); a mounting groove (16) is provided on the upper die (14) or the lower die (15); and the air flotation device is arranged in the mounting groove (16).

9. The coating die head according to claim 7, characterized in that: Also includes: A moving component (13) is arranged on the die body (11), and the moving component (13) is connected to the air flotation device to adjust the distance between the air outlet (4) of the air flotation device and the foil (12) to be coated.

10. The coating die head according to claim 9, characterized in that: The movable components (13) are two in number, and the two movable components (13) are respectively connected to two ends of the air flotation device.

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