A coating die head

Abstract

The utility model relates to the technical field of coating machines and coating machine accessories, and specifically to a coating die head, comprising a first die head, a second die head and a first gasket sandwiched between the first die head and the second die head, the first die head, the first gasket and the second die head enclose a coating slit and a coating lip connected to the coating slit, the second die head comprises a die head body, a second gasket and a cover plate; a groove is provided on the side of the die head body away from the first gasket; the cover plate is detachably connected in the groove, the second gasket is sandwiched between the groove and the cover plate, and an opening is provided on the second gasket; the groove, the second gasket and the cover plate enclose an air cavity and an air outlet connected to the air cavity, the air outlet is located on the side of the second die head provided with the coating lip; the second die head is provided with at least one air inlet connected to the air cavity. The utility model solves the technical problems of the existing coating machine with complex structure and high cost.

Description

Technical Field

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

[0002] The existing coating die head is usually composed of an upper die head, a lower die head and a gasket sandwiched therebetween. The upper die head, the lower die head and the gasket enclose a coating slit and a coating lip connected to the coating slit. The coating is carried out by discharging the material through the coating slit and the coating lip, and only slurry coating is achieved. The function is single. During the coating process, the existing coating machine usually needs to first coat the material through the coating die head and then air-dry it through a wind knife device. The structure is complex and the cost is high. Utility Model Content

[0003] The utility model provides a coating die head, which solves the technical problems of the existing coating machine having a complex structure and high cost.

[0004] In view of this, the utility model provides a coating die, comprising a first die, a second die and a first gasket clamped between the first die and the second die, the first die, the first gasket and the second die together form a coating slit and a coating lip connected to the coating slit, the second die comprises a die body, a second gasket and a cover plate; a groove is provided on the side of the die body away from the first gasket; the cover plate is detachably connected to the groove, the second gasket is clamped between the groove and the cover plate, and the second gasket is provided with an opening; the groove, the second gasket and the cover plate together form an air cavity and an air outlet connected to the air cavity, the air outlet is located on the side of the second die where the coating lip is provided; the second die is provided with at least one air inlet connected to the air cavity.

[0005] Optionally, a groove bottom of the groove is provided with a groove, the depth of the groove gradually decreases from the inside to the outside, and the groove is arranged in a stepped shape.

[0006] Optionally, the air outlet is arranged to be inclined from the inside to the outside toward a side away from the coating lip.

[0007] Optionally, the angle between the air outlet and the coating lip is 10°-45°.

[0008] Optionally, the angle between the air outlet and the coating lip is 30 degrees.

[0009] Optionally, an adjustment groove is provided on a side of the first die head away from the first gasket, the adjustment groove is arranged along the length direction of the first die head, the adjustment groove divides the first die head into a fixed part and an adjustment part, and the coating lip is located on a side of the first die head close to the adjustment part;

[0010] An adjusting component is provided on the fixing portion corresponding to the adjusting groove, an adjusting end of the adjusting component is connected to the adjusting portion, and the adjusting component is suitable for adjusting the adjusting portion to be close to or away from the fixing portion to change the opening size of the coating lip.

[0011] Optionally, the adjustment assembly includes at least one set of threaded screws, and the threaded screws include a screw and a nut; the nut can be rotatably inserted into the adjustment part along a direction perpendicular to the side wall of the adjustment groove; one end of the screw is connected to the fixing part, and the other end is threadedly connected to the nut.

[0012] Optionally, the plurality of groups of threaded screws are provided, and the plurality of groups of threaded screws are evenly arranged along the length direction of the adjustment slot.

[0013] Optionally, the fixing portion and the peripheral side of the second die head are connected via a plurality of connecting blocks.

[0014] Optionally, the first die head and the second die head are connected by a plurality of positioning pins.

[0015] The technical solution of the utility model has the following advantages:

[0016] In the utility model, slurry coating can be achieved through the coating slit and the coating lip, and an air outlet is arranged on the second die head, which is connected to an external air inlet device through the air inlet. When drying is required, air is introduced into the air cavity through the air inlet and then blown out from the air outlet to dry the slurry coated by the coating lip. The air outlet and the coating lip are located on the same side, so coating and drying can be performed at the same time, realizing an integrated arrangement of the wind knife and the second die head. When applied to a coating machine, there is no need to additionally arrange a wind knife, thereby simplifying the structure and reducing the cost. In addition, by utilizing the high thickness of the second die head, the stability during air outlet is better, thereby ensuring uniform wind pressure at the air outlet and improving the uniformity of the coating film. At the same time, the second gasket is clamped by the cover plate and the die body to form an air cavity and an air outlet. The split arrangement is convenient for installation and disassembly, maintenance and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of the structure of a coating die head provided by the utility model at a first viewing angle;

[0019] Figure 2 An exploded view of a coating die head provided by the utility model at a second viewing angle;

[0020] Figure 3 A schematic diagram of the structure of a coating die head provided by the utility model at a third viewing angle;

[0021] Figure 4 for Figure 3 Middle AA section view;

[0022] Figure 5 A schematic diagram of the structure of a coating die head provided by the utility model at a fourth viewing angle;

[0023] Figure 6 A schematic diagram of the structure of the die body provided by the utility model;

[0024] Figure 7 This is a schematic structural diagram of the first die head provided by the utility model.

[0025] Description of reference numerals:

[0026] 1. First die head; 101. Adjusting part; 102. Fixing part; 2. Second die head; 201. Die head body; 202. Groove; 203. Second gasket; 204. Cover plate; 205. Air inlet; 3. First gasket; 4. Coating lip; 5. Adjusting groove; 6. Adjusting assembly; 601. Screw; 602. Nut; 7. Connecting block; 8. Air cavity; 9. Air outlet; 10. Positioning pin. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1

[0032] See also Figures 1 to 7 A coating die head provided in this embodiment includes a first die head 1, a second die head 2 and a first gasket 3 sandwiched between the first die head 1 and the second die head 2, the first die head 1, the first gasket 3 and the second die head 2 enclose a coating slit and a coating lip 4 connected to the coating slit, the second die head 2 includes a die head body 201, a second gasket 203 and a cover plate 204; a groove 202 is provided on the side of the die head body 201 away from the first gasket 3; the cover plate 204 is detachably connected in the groove 202, the second gasket 203 is sandwiched between the groove 202 and the cover plate 204, and an opening is provided on the second gasket 203; the groove 202, the second gasket 203 and the cover plate 204 enclose an air cavity 8 and an air outlet 9 connected to the air cavity 8, and the air outlet 9 is located on the side of the second die head 2 provided with the coating lip 4; the second die head 2 is provided with at least one air inlet 205 connected to the air cavity 8.

[0033] It should be noted that the direction of the opening of the second gasket 203 corresponds to the direction of the groove 202, that is, it is directed toward the side of the second die head 2 where the coating lip 4 is provided, so as to enclose the air cavity 8 and the air outlet 9; the air outlet 9 is arranged along the length direction of the second die head 2.

[0034] In this embodiment, slurry coating can be achieved through the coating slit and the coating lip. At the same time, an air outlet 9 is arranged on the second die head 2, and the air inlet 205 is connected to an external air inlet device. When drying is required, air is introduced into the air cavity 8 through the air inlet 205 and then blown out from the air outlet 9 to dry the slurry coated on the coating lip 4. The air outlet 9 and the coating lip 4 are located on the same side, and coating and drying can be performed at the same time, thereby realizing the integrated setting of the wind knife and the second die head 2. When the coating die head provided in this embodiment is applied to the coating machine, there is no need to set up an additional wind knife, which simplifies the structure and reduces the cost. In addition, the high thickness of the second die head is utilized to achieve better stability during air outlet, thereby ensuring uniform wind pressure at the air outlet and improving the uniformity of the coating film. At the same time, the second gasket 203 is clamped by the cover plate 204 and the die body 201 to form the wind cavity 8 and the air outlet 9. The split setting is convenient for installation and disassembly, maintenance and cleaning.

[0035] Example 2

[0036] As a further improvement to Example 1, Figure 4 and Figure 6 As shown, the groove bottom of the groove 202 is concavely provided with a groove, the depth of the groove gradually decreases from the inside to the outside, and the groove is arranged in a stepped shape.

[0037] In this embodiment, the space of the air cavity is widened by slotting, so as to provide space so that the airflow entering the air cavity 8 is evenly distributed after passing through the stepped slots, and then the wind force at the air outlet is more uniform when it is blown out through the air outlet 9.

[0038] Based on the above implementation, in a preferred implementation, Figure 4 As shown, the air outlet 9 is inclined from the inside to the outside toward the side away from the coating lip 4.

[0039] In this embodiment, the air outlet 9 and the coating lip 4 are tilted at a preset angle to avoid the airflow of the air outlet 9 from blowing toward one side of the coating lip 4, thereby avoiding affecting the coating quality of the coating lip 4. At the same time, the airflow of the air outlet 9 can be prevented from blowing directly toward the coated slurry, thereby reducing the air outlet intensity. By tilting the air outlet 9, the airflow is more uniform and acts evenly on the slurry surface, thereby improving the coating quality. At the same time, since the air outlet 9 is tilted, that is, there is a bending and tilting inflection point in the groove 202, the groove 202 is utilized to 2, it is convenient to use the inflection point for positioning and installation when installing the second gasket 203 and the cover plate 204, thereby improving the accuracy of installation. At the same time, when the coating lip 4 is set downward in the vertical direction, the inflection point of the groove 202 can have a certain supporting effect on the cover plate 204, thereby preventing the cover plate 204 from deforming under the action of its own gravity, resulting in uneven air outlet 9 and affecting the uniformity of coating. The influence of its own gravity is reduced by the inflection point, thereby ensuring that the wind pressure at the air outlet 9 is uniform and improving the uniformity of the coating film.

[0040] Based on the above implementation, in a preferred implementation, Figure 4 As shown, the angle between the air outlet 9 and the coating lip 4 is 10°-45°.

[0041] In this embodiment, the angle between the air outlet 9 and the coating lip 4 can be selected to be 10°-45° to ensure the coating quality. Specifically, the angle between the air outlet 9 and the coating lip 4 can be selected to be 10° or 45°. Technical personnel in this field can make a selection based on actual conditions.

[0042] On the basis of the above-mentioned embodiment, in a preferred embodiment, the angle between the air outlet 9 and the coating lip 4 is 30 degrees.

[0043] In this embodiment, the angle between the air outlet 9 and the coating lip 4 is preferably 30 degrees, to avoid too small an angle, concentrated air flow, too strong wind force, which may cause the slurry to be blown away, and too large an angle, too weak wind force, which may affect the drying effect.

[0044] Based on the above implementation, in a preferred implementation, Figure 1 and Figure 4 As shown, an adjustment groove 5 is provided on the side of the first die head 1 facing away from the first gasket 3, and the adjustment groove 5 is arranged along the length direction of the first die head 1. The adjustment groove 5 divides the first die head 1 into a fixed part 102 and an adjustment part 101, and the coating lip 4 is located on the side of the first die head 1 close to the adjustment part 101; an adjustment component 6 is provided on the fixed part 102 corresponding to the adjustment groove 5, and the adjustment end of the adjustment component 6 is connected to the adjustment part 101, and the adjustment component 6 is suitable for adjusting the adjustment part 101 to be close to or away from the fixed part 102 to change the opening size of the coating lip 4.

[0045] It should be noted that the coating lip 4 includes a first lip and a second lip, the first lip is arranged on the first die 1 , the second lip is arranged on the second die 2 , and the first lip and the second lip enclose the coating lip 4 .

[0046] In this embodiment, by providing an adjustment groove 5 on the first die head 1, when it is necessary to adjust the coating thickness of the coating lip 4 to become larger, the adjustment part 101 is driven to approach the fixing part 102 by the adjustment component 6. Since the adjustment groove 5 is provided between the adjustment part 101 and the fixing part 102, when the adjustment part 101 is subjected to the pulling force applied by the driving component, the adjustment part 101 takes the adjustment groove 5 as the base point, and at the same time has a tendency to bend and deform at the adjustment groove 5 away from the second die head 2, that is, the deformation causes the adjustment part 101 to bend and deform and then move away from the second die head 2, that is, the first lip moves away from the second lip, thereby making the coating lip 4 enclosed by the adjustment part 101 and the second die head 2 larger, thereby changing the opening size of the coating lip 4. Conversely, when it is necessary to adjust the coating thickness to become smaller, the adjustment component 6 is driven to adjust the adjustment part 101 to move away from the second die head 2. The portion 101 is far away from the fixed portion 102. Since an adjusting groove 5 is provided between the adjusting portion 101 and the fixed portion 102, when the adjusting portion 101 is subjected to the thrust applied by the driving component, the adjusting portion 101 takes the adjusting groove 5 as the base point and has a tendency to bend and deform toward the second die head 2 at the adjusting groove 5, that is, the deformation causes the adjusting portion 101 to bend and deform and then approach the second die head 2, that is, the first lip approaches the second lip, thereby making the coating lip 4 formed by the adjusting portion 101 and the second die head 2 smaller. By providing the adjusting groove 5, when subjected to external force, the adjusting groove 5 is more likely to be deformed, and at the same time, the adjusting component 6 is cooperated to realize the control of the opening size of the coating lip 4. The adjustment method is simple, time-saving and labor-saving, and there is no need to disassemble and adjust the first die head 1 and the second die head 2, thereby improving work efficiency.

[0047] Based on the above implementation, in a preferred implementation, Figure 1 and Figure 4 As shown, the adjustment component 6 includes at least one group of threaded screws, and the threaded screws include a screw 601 and a nut 602; the nut 602 is rotatably inserted into the adjustment part 101 along a direction perpendicular to the side wall of the adjustment slot 5; one end of the screw 601 is connected to the fixing part 102, and the other end is threadedly connected to the nut 602.

[0048] It should be noted that the position of the screw 601 corresponds to the position of the nut 602 , and the positions of the screw 601 and the nut 602 both correspond to the adjustment slot 5 , so as to facilitate the deformation of the adjustment portion 101 .

[0049] In this embodiment, the adjustment component 6 can be selected as a threaded screw. When the coating thickness needs to be adjusted, the nut 602 is rotated to move the nut 602 on the screw 601, thereby driving the adjustment part 101 to move closer to or away from the fixing part 102.

[0050] As a convertible embodiment, the adjustment assembly 6 may include at least one set of screws, and the screws include a screw 601 and a nut 602; the screw 601 is rotatably arranged in the adjustment portion 101 in a direction perpendicular to the side wall of the adjustment slot 5; one end of the nut 602 is connected to the fixing portion 102, and the other end is threadedly connected to the screw 601. When the coating thickness needs to be adjusted, the nut 602 is rotated to move on the screw 601, thereby driving the adjustment portion 101 to approach or move away from the fixing portion 102.

[0051] As a convertible implementation, the present embodiment does not limit the specific structure of the adjustment component 6. The adjustment component 6 can be optionally a hydraulic cylinder, and the output shaft of the hydraulic cylinder is connected to the adjustment part 101 to provide driving force for adjustment; the adjustment component 6 can also be a cylinder, and technical personnel in this field can make a choice according to actual conditions.

[0052] On the basis of the above-mentioned embodiment, in a preferred embodiment, the plurality of groups of threaded screws are provided, and the plurality of groups of threaded screws are evenly arranged along the length direction of the adjustment slot 5 .

[0053] In this embodiment, multiple groups of threaded screws are provided to facilitate adjustment, thereby improving the adjustment strength and uniformity, and the openings of the coating lip 4 at different positions can be adjusted.

[0054] Specifically, an adjustment port is provided on the side of the adjustment portion 101 facing away from the adjustment slot 5 corresponding to each set of threaded screws, so as to facilitate adjustment of the screw 601 or the nut 602 .

[0055] Based on the above implementation, in a preferred implementation, Figure 1 As shown, the fixing portion 102 and the peripheral side of the second die head 2 are connected via a plurality of connecting blocks 7 .

[0056] In this embodiment, the fixing part 102 of the first die head 1 and the second die head 2 are connected by a connecting block 7. The connecting block 7 is located on the outside for easy installation and disassembly. The connecting block 7 is located on the fixing part 102 to increase the supporting strength without affecting the adjustment of the adjusting part 101.

[0057] Specifically, Figure 1 As shown, one end of the connecting block 7 is screwed to the fixing portion 102, and the other end is screwed to the second die head 2, so as to facilitate installation and disassembly.

[0058] Based on the above implementation, in a preferred implementation, Figure 1 , Figure 4 and Figure 6As shown, a wind cavity 8 is provided in the second die head 2, and an air outlet 9 connected to the wind cavity 8 is provided on the second die head 2 along its length direction, and the air outlet 9 is located on the side of the second die head 2 where the coating lip 4 is provided; at least one air inlet 205 connected to the wind cavity 8 is provided on the second die head 2.

[0059] In this embodiment, an air outlet 9 is provided on the second die head 2, which is connected to an external air inlet device through the air inlet 205. When drying is required, air is introduced into the air cavity 8 through the air inlet 205 and then blown out from the air outlet 9 to dry the slurry coated on the coating lip 4. The air outlet 9 and the coating lip 4 are located on the same side, and coating and drying can be performed at the same time, thereby realizing an integrated setting of the wind knife and the second die head 2. There is no need to set up an additional wind knife, thereby simplifying the structure and reducing costs.

[0060] Specifically, Figure 5 As shown, the cover plate 204 is connected to the die body 201 by screws 601 .

[0061] Specifically, Figure 5 As shown, the air inlet 205 is arranged on the cover plate 204, which is convenient for processing and forming, and is also convenient for disassembly and maintenance.

[0062] Specifically, a plurality of air inlets 205 are provided, and the plurality of air inlets 205 are evenly arranged along the length direction of the second die head 2 .

[0063] Specifically, Figure 5 As shown, the air inlet 205 is connected to an air inlet pipe opening to facilitate connection with an external air inlet device.

[0064] Based on the above implementation, in a preferred implementation, Figures 1 to 3 As shown, the first die head 1 and the second die head 2 are connected by a plurality of positioning pins 10 .

[0065] In this embodiment, a plurality of positioning pins 10 are provided on the first die head 1 and the second die head 2 for positioning, so as to improve the accuracy during connection.

[0066] Specifically, a plurality of first pin holes are arranged on the first die head 1, and second pin holes are arranged on the second die head 2 corresponding to the first pin holes, so that the positioning pin 10 can be inserted into the first pin holes and the second pin holes for positioning, thereby improving the accuracy of connection.

[0067] The working principle of the coating die head provided in this embodiment is as follows: Figure 3 and Figure 4As shown; when the coating thickness of the coating lip 4 needs to be adjusted to become larger, the adjusting nut 602 is rotated on the screw 601 to drive the adjusting portion 101 to approach the fixing portion 102. Since an adjusting groove 5 is provided between the adjusting portion 101 and the fixing portion 102, when the adjusting portion 101 is subjected to the pulling force applied by the driving component, the adjusting portion 101 takes the adjusting groove 5 as the base point and has a tendency to bend and deform at the adjusting groove 5 away from the second die head 2, that is, deformation occurs so that the adjusting portion 101 is bent and deformed. When the coating thickness needs to be adjusted to be smaller, the adjusting nut 602 is rotated in the opposite direction on the screw 601 to drive the adjusting part 101 away from the fixing part 102. Since an adjusting slot 5 is provided between the adjusting part 101 and the fixing part 102, when the adjusting part 101 is subjected to the thrust applied by the driving component, the first lip 601 is moved away from the second die head 2, that is, the first lip is moved away from the second lip, so that the coating lip 4 formed by the adjusting part 101 and the second die head 2 becomes larger, and the opening size of the coating lip 4 is changed. Conversely, when the coating thickness needs to be adjusted to be smaller, the adjusting nut 602 is rotated in the opposite direction on the screw 601 to drive the adjusting part 101 away from the fixing part 102. The adjusting portion 101 takes the adjusting groove 5 as the base point, and has a tendency to bend and deform toward the second die head 2 at the adjusting groove 5, that is, the deformation causes the adjusting portion 101 to bend and deform and then approach the second die head 2, that is, the first lip approaches the second lip, thereby making the coating lip 4 enclosed by the adjusting portion 101 and the second die head 2 smaller. By providing the adjusting groove 5, when subjected to external force, the adjusting groove 5 is more likely to deform, and at the same time, the adjusting component 6 is used to control the opening size of the coating lip 4. The adjustment method is simple, time-saving and labor-saving, and there is no need to disassemble and adjust the first die head 1 and the second die head 2, thereby improving work efficiency; when drying is required, an external air inlet device is connected through the air inlet 205, and air flow is provided into the air cavity 8 and then blown out from the air outlet 9 for drying, which can simultaneously realize the functions of discharge coating and drying, and realize the integrated setting of the air knife and the coating die head. When the coating die head provided in this embodiment is applied to the coating machine, there is no need to set an additional air knife, which simplifies the structure and reduces the cost. The technical problems of the existing coating machine being complex in structure and high in cost are solved.

[0068] 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 therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A coating die, comprising a first die (1), a second die (2) and a first gasket (3) sandwiched between the first die (1) and the second die (2), wherein the first die (1), the first gasket (3) and the second die (2) enclose a coating slit and a coating lip (4) connected to the coating slit, characterized in that: The second die head (2) comprises a die head body (201), a second gasket (203) and a cover plate (204); a groove (202) is provided on a side of the die head body (201) facing away from the first gasket (3); the cover plate (204) is detachably connected in the groove (202), the second gasket (203) is clamped between the groove (202) and the cover plate (204), and an opening is provided on the second gasket (203); the groove (202), the second gasket (203) and the cover plate (204) form an air cavity (8) and an air outlet (9) connected to the air cavity (8), and the air outlet (9) is located on a side of the second die head (2) where the coating lip (4) is provided; and the second die head (2) is provided with at least one air inlet (205) connected to the air cavity (8).

2. The coating die head according to claim 1, characterized in that: The groove bottom of the groove (202) is provided with a groove, the depth of the groove gradually decreases from the inside to the outside, and the groove is arranged in a stepped shape.

3. The coating die head according to claim 1, characterized in that: The air outlet (9) is arranged to be inclined from the inside to the outside toward a side away from the coating lip (4).

4. The coating die head according to claim 3, characterized in that: The included angle between the air outlet (9) and the coating lip (4) is 10°-45°.

5. The coating die head according to claim 4, characterized in that: The included angle between the air outlet (9) and the coating lip (4) is 30 degrees.

6. The coating die head according to any one of claims 1 to 5, characterized in that: An adjustment groove (5) is provided on a side of the first die head (1) facing away from the first gasket (3), the adjustment groove (5) is arranged along the length direction of the first die head (1), the adjustment groove (5) divides the first die head (1) into a fixed part (102) and an adjustment part (101), and the coating lip (4) is located on a side of the first die head (1) close to the adjustment part (101); An adjustment component (6) is provided on the fixing portion (102) corresponding to the adjustment groove (5); an adjustment end of the adjustment component (6) is connected to the adjustment portion (101); and the adjustment component (6) is suitable for adjusting the adjustment portion (101) to be close to or away from the fixing portion (102) so as to change the opening size of the coating lip (4).

7. The coating die head according to claim 6, characterized in that: The adjustment assembly (6) comprises at least one set of threaded screws, wherein the threaded screws comprise a screw (601) and a nut (602); the nut (602) is rotatably inserted into the adjustment portion (101) in a direction perpendicular to the side wall of the adjustment slot (5); one end of the screw (601) is connected to the fixing portion (102), and the other end is threadedly connected to the nut (602).

8. The coating die head according to claim 7, characterized in that: The plurality of groups of threaded screws are arranged in a uniform manner along the length direction of the adjustment slot (5).

9. The coating die head according to claim 6, characterized in that: The fixing portion (102) and the peripheral side of the second die head (2) are connected via a plurality of connecting blocks (7).

10. The coating die head according to claim 1, characterized in that: The first die head (1) and the second die head (2) are connected via a plurality of positioning pins (10).

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