Coating die head capable of being cleaned on line

Abstract

The utility model discloses a coating die head capable of being cleaned on line, the coating die head comprises an upper die head and a lower die head which are oppositely arranged, a coating slit is formed between the upper die head and the lower die head, the coating slit is respectively communicated with a T-shaped block groove in the upper die head and a slurry cavity in the lower die head, the slurry cavity is further communicated with a feeding channel in the lower die head, and the feeding channel is communicated with the T-shaped block groove in the upper die head and the slurry cavity in the lower die head. A plurality of mounting holes are further formed in the upper die head, one end of each mounting hole is communicated with the corresponding T-shaped block groove, the other end of each mounting hole penetrates through the outer wall of the upper die head, the coating die head further comprises a plurality of high-pressure nozzles, the high-pressure nozzles are mounted in the mounting holes in a one-to-one correspondence mode, and the spraying ends, provided with spraying holes, of the high-pressure nozzles are located in the upper die head. When the T block and the T block groove need to be cleaned, cleaning liquid only needs to be injected into the high-pressure spray head and sprayed into the T block groove from the spray hole of the high-pressure spray head, and then online cleaning of the T block and the T block groove can be conveniently and rapidly achieved with low workload.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to a coating die head which can be cleaned online. Background Art

[0002] Slot-slot coating is a precision wet coating technology that operates by extruding a slurry through the coating slit of a coating die at a constant pressure and flow rate, transferring it to the substrate. Compared to other coating methods, slot-slot coating offers numerous advantages, including fast coating speed, high precision, and uniform coating thickness. Its closed coating system prevents contaminants from entering the coating system during the coating process. Furthermore, it offers high slurry utilization, maintains stable slurry properties, and can simultaneously apply multiple layers. It can accommodate slurries of varying viscosities and solids contents.

[0003] However, when the coating die is shut down to change the slurry, the slurry cavity, gasket and T-block of the coating die need to be cleaned. When cleaning the slurry cavity and gasket, the upper die is usually opened by flipping open the hinge, and the exposed slurry cavity and gasket are cleaned, which is relatively convenient. However, since the T-block and the actuator or differential head are locked in the T-block groove of the upper die with a screw or coupling, when cleaning the T-block, the screw or coupling must be removed first, and then the T-block must be taken out of the T-block groove for cleaning. Therefore, the cleaning efficiency is low, and the large number of T-blocks in the upper die further increases the workload of cleaning.

[0004] Therefore, it is necessary to design a coating die head that can be cleaned online to solve the problems of low cleaning efficiency and large workload of T-blocks and T-block grooves. Utility Model Content

[0005] Therefore, the technical problem to be solved by the present invention is that the cleaning efficiency of the T-block and T-block groove of the existing coating die is low and the workload is large, so as to provide a coating die that can be cleaned online.

[0006] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0007] A coating die that can be cleaned online, the coating die comprising an upper die and a lower die arranged opposite to each other, a coating slit formed between the upper die and the lower die, the coating slit respectively connected to the T-block groove in the upper die and the slurry chamber in the lower die, the slurry chamber also connected to the feed channel in the lower die, a plurality of T-blocks are slidably installed in the T-block groove, a plurality of mounting holes are also provided in the upper die, one end of the mounting hole is connected to the T-block groove, and the other end passes through the outer wall of the upper die, the coating die also comprises a plurality of high-pressure nozzles, a plurality of the high-pressure nozzles are installed in the plurality of mounting holes in a one-to-one corresponding position, and the injection end with the injection hole on the high-pressure nozzle is located in the upper die.

[0008] Furthermore, the upper die head is provided with drainage holes at both ends in the length direction thereof, the drainage holes are connected to the T-block groove, and the position of the drainage holes is lower than the position of the injection hole.

[0009] Furthermore, the T-block includes a root, a neck and a head connected in sequence from top to bottom, the width of the root is greater than the width of the neck and smaller than the width of the head, so as to form a groove on the T-block corresponding to the neck, and the injection end enters the groove.

[0010] Furthermore, the groove is an annular groove.

[0011] Furthermore, the T-block groove includes a first section, a second section and a third section connected in sequence from top to bottom, the width of the third section is greater than the width of the first section and smaller than the width of the second section, and the root, the neck and the head are respectively arranged corresponding to the first section, the second section and the third section.

[0012] Furthermore, one end of the mounting hole is connected to the T-block groove, and the other end passes through the top surface, front surface, inclined surface or back surface of the upper die head.

[0013] Furthermore, the access end of the high-pressure nozzle is connected in parallel to a high-pressure cleaning liquid access pipeline and a high-pressure gas access pipeline that are in a passage state, and the access end is the end of the high-pressure nozzle opposite to the injection end.

[0014] Furthermore, the access end is threadedly connected to the mounting hole.

[0015] Furthermore, the injection hole is provided on one side of the injection end or the injection holes are provided on two opposite sides.

[0016] Furthermore, a control module is included, and the plurality of high-pressure nozzles are controlled by the control module to be turned on / off individually or in groups.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. The utility model provides an online-cleanable coating die head. Since a plurality of mounting holes are provided in the upper die head, one end of the mounting hole is connected to the T-block groove, and the other end passes through the outer wall of the upper die head, the coating die head also includes a plurality of high-pressure nozzles, and the plurality of high-pressure nozzles are installed in the plurality of mounting holes in corresponding positions one by one. The injection end with the injection hole on the high-pressure nozzle is located in the upper die head. When the T-block and the T-block groove need to be cleaned, there is no need to flip the upper die head or remove the T-block from the T-block groove. Only the cleaning liquid needs to be injected into the high-pressure nozzle and sprayed into the T-block groove from the injection hole of the high-pressure nozzle. The online cleaning of the T-block and the T-block groove can be achieved conveniently, quickly and with low workload.

[0019] 2. The utility model provides an online cleanable coating die head, and the upper die head is respectively provided with drainage holes at both ends in the length direction. The drainage holes are connected to the T-block groove. The position of the drainage hole is lower than the position of the injection hole. This drainage hole can be used to discharge the cleaning liquid during the cleaning process and to relieve pressure during the coating process. Since the drainage hole can be used for pressure relief during the coating process, it can prevent the slurry from entering the gap between the T blocks and filling the T-block groove, and the T block cannot slide in the T-block groove, thereby losing the function of regulating the amount of slurry entering the coating slit.

[0020] 3. The coating die head that can be cleaned online provided by the utility model has a T-block including a root, a neck and a head connected in sequence from top to bottom. The width of the root is greater than the width of the neck and smaller than the width of the head, so as to form a groove corresponding to the neck on the T-block, and the injection end enters the groove. This groove can also provide a flow channel for the cleaning liquid, thereby improving the flow smoothness and flow range (that is, the cleaning range) of the cleaning liquid and improving the cleaning effect.

[0021] 4. The coating die head provided by the present invention can be cleaned online, and the groove is an annular groove, which further increases the flow channel size and flow range (ie, cleaning range) of the cleaning liquid, further improving the cleaning effect.

[0022] 5. The online-cleanable coating die provided by the present invention has a T-block groove comprising a first section, a second section and a third section connected in sequence from top to bottom. The width of the third section is greater than that of the first section and less than that of the second section. The root, neck and head are respectively arranged corresponding to the first section, the second section and the third section. Since the distance between the second section and the neck is greater than the distance between the first section and the root and the distance between the third section and the head, the flow of the cleaning liquid is smoother at the second section and the neck, so that the flow range of the cleaning liquid (that is, the cleaning range) is further expanded, thereby further improving the cleaning effect.

[0023] 6. The utility model provides an online cleanable coating die head, in which the access end of the high-pressure nozzle is connected in parallel to a high-pressure cleaning liquid access pipeline and a high-pressure gas access pipeline, which are both in a passage state. The access end is the end of the high-pressure nozzle opposite to the injection end. In this way, after cleaning the T-block and the T-block groove with the cleaning liquid, the T-block groove can be purged with high-pressure gas to drain the cleaning liquid in the T-block groove, thereby avoiding the influence of the residual cleaning liquid on the coating quality.

[0024] 7. The online cleanable coating die provided by the present invention also includes a control module. Multiple high-pressure nozzles are controlled by the control module to be turned on / off individually or in groups. In this way, the on / off of high-pressure nozzles at different positions can be flexibly adjusted as needed to improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 any creative work.

[0026] Figure 1 This is a cross-sectional schematic diagram of the coating die head when the mounting hole penetrates outward through the inclined surface of the upper die head in the embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A schematic cross-sectional view of the coating die head after removing the T-block and the high-pressure nozzle;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a cross-sectional schematic diagram of the coating die head when the mounting hole penetrates outward through the front of the upper die head in an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional schematic diagram of the coating die head when the mounting hole penetrates outward through the back of the upper die head in an embodiment of the present invention;

[0031] Figure 6 This is a cross-sectional schematic diagram of the coating die head when the mounting hole penetrates outward through the top surface of the upper die head in an embodiment of the present invention;

[0032] Figure 7 This is a schematic structural diagram of a T block in an embodiment of the present utility model;

[0033] Figure 8 This is a schematic structural diagram of a high-pressure nozzle in an embodiment of the present utility model;

[0034] Figure 9 Schematic diagram of cleaning T-blocks and the cleaning direction of T-blocks in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Upper die head; 10. Drain hole; 11. T-block groove; 111. First section; 112. Second section; 113. Third section; 12. Mounting hole; 13. Inclined surface; 14. Front; 15. Back; 16. Top surface; 2. Lower die head; 21. Slurry chamber; 22. Feed channel; 3. Coating slit; 31. Lip; 4. T-block; 41. Groove; 42. Gap; 43. Root; 44. Neck; 45. Head; 451. Top surface of head; 5. High-pressure nozzle; 51. Left threaded section; 52. Right threaded section; 53. Needle tube; 54. Injection hole. DETAILED DESCRIPTION

[0037] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] 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.

[0041] like Figures 1 to 9As shown, the utility model provides a coating die head that can be cleaned online, and the coating die head includes an upper die head 1 and a lower die head 2 that are arranged opposite to each other, and a coating slit 3 connected to a lip 31 is formed between the upper die head 1 and the lower die head 2, and the coating slit 3 is respectively connected to the T-block groove 11 in the upper die head 1 and the slurry cavity 21 in the lower die head 2, and the slurry cavity 21 is also connected to the feed channel 22 in the lower die head 2, and a plurality of T-blocks 4 are slidably installed in the T-block groove 11, and the T-block 4 slides up and down to adjust the amount of slurry entering the coating slit 3, thereby adjusting the coating thickness and / or coating uniformity. A plurality of mounting holes 12 (such as Figure 2 As shown), one end of the mounting hole 12 is connected to the T-block groove 11, and the other end passes through the outer wall of the upper die head 1. The coating die head also includes a plurality of high-pressure nozzles 5, and the plurality of high-pressure nozzles 5 are installed in the plurality of mounting holes 12 in corresponding positions. The injection end of the high-pressure nozzle 5 with the injection hole 54 is located in the upper die head 1.

[0042] The utility model provides a coating die head that can be cleaned online. Since a plurality of mounting holes 12 are also provided in the upper die head 1, one end of the mounting hole 12 is connected to the T-block groove 11, and the other end passes through the outer wall of the upper die head 1, the coating die head also includes a plurality of high-pressure nozzles 5, and the plurality of high-pressure nozzles 5 are installed in the plurality of mounting holes 12 in corresponding positions one by one. The injection end of the high-pressure nozzle 5 with the injection hole 54 is located in the upper die head 1. When it is necessary to clean the T-block 4 and the T-block groove 11, there is no need to flip the upper die head 1 or remove the T-block 4 from the T-block groove 11. It is only necessary to inject the cleaning liquid into the high-pressure nozzle 5 and spray it into the T-block groove 11 from the injection hole 54 of the high-pressure nozzle 5. The online cleaning of the T-block 4 and the T-block groove 11 can be achieved conveniently, quickly and with low workload.

[0043] Regarding the position of the mounting hole 12, the present invention provides four implementation methods, such as Figure 1 As shown, one end of the mounting hole 12 is connected to the T-block groove 11, and the other end passes through the inclined surface 13 of the upper die head 1; Figure 4 As shown, one end of the mounting hole 12 is connected to the T-block groove 11, and the other end passes through the front face 14 of the upper die head 1; Figure 5 As shown, one end of the mounting hole 12 is connected to the T-block groove 11, and the other end passes through the back surface 15 of the upper die head 1; Figure 6 As shown, one end of the mounting hole 12 is connected to the T-block groove 11 , and the other end passes through the top surface 16 of the upper die head 1 .

[0044] Furthermore, the upper die head 1 is provided with drain holes 10 (such as Figure 9As shown), the drain hole 10 is connected to the T block groove 11. The drain hole 10 is located lower than the injection hole 54. The drain hole 10 can be used to discharge the cleaning liquid during the cleaning process and can be used for pressure relief during the coating process. Since the drain hole 10 can be used for pressure relief during the coating process, it can avoid the slurry from the gap 42 between the T blocks 4 (as shown). Figure 9 After the T-block 4 enters and fills the T-block groove 11, the T-block 4 cannot slide in the T-block groove 11, thereby losing the function of regulating the amount of slurry entering the coating slit 3. In addition, preferably, the two drain holes 10 are connected to the second section 112 of the T-block groove 11 (as shown). Figure 3 shown) at both ends.

[0045] Furthermore, the T-block 4 includes a root, a neck and a head connected in sequence from top to bottom. The width of the root is greater than the width of the neck and smaller than the width of the head, so as to form a groove 41 at the corresponding neck on the T-block 4. The injection end enters the groove 41. This groove 41 can also provide a flow channel for the cleaning liquid, thereby improving the flow smoothness and flow range (that is, the cleaning range) of the cleaning liquid, thereby improving the cleaning effect.

[0046] Furthermore, the groove 41 is an annular groove 41 , which further increases the flow channel size and flow range (ie, the cleaning range) of the cleaning liquid, thereby further improving the cleaning effect.

[0047] Furthermore, if Figure 3 As shown, the T-block groove 11 includes a first section 111, a second section 112 and a third section 113 which are connected in sequence from top to bottom. The width of the third section 113 is greater than the width of the first section 111 and smaller than the width of the second section 112. The root 43, the neck 44 and the head 45 are respectively arranged corresponding to the first section 111, the second section 112 and the third section 113. Since the distance between the second section 112 and the neck 44 is greater than the distance between the first section 111 and the root 43 and the distance between the third section 113 and the head 45, the flow of the cleaning liquid is smoother at the second section 112 and the neck 44, so that the flow range of the cleaning liquid (that is, the cleaning range) is further expanded, thereby further improving the cleaning effect.

[0048] Furthermore, the access end of the high-pressure nozzle 5 (the access end is the end on the high-pressure nozzle 5 opposite to the injection end) is connected in parallel to a high-pressure cleaning liquid access pipeline and a high-pressure gas access pipeline that are in a passage state. In this way, after the T-block 4 and the T-block groove 11 are cleaned with cleaning liquid, the T-block groove 11 can be purged with high-pressure gas to drain the cleaning liquid in the T-block groove 11, thereby avoiding the influence of residual cleaning liquid on the coating quality. Specifically, the access end is connected to an external pipeline, which is bifurcated to form a high-pressure cleaning liquid access pipeline and a high-pressure gas access pipeline. A cleaning liquid switch valve is provided on the high-pressure cleaning liquid access pipeline to control the on-off of the high-pressure cleaning liquid access pipeline, and a high-pressure gas switch valve is provided on the high-pressure gas access pipeline to control the on-off of the high-pressure gas access pipeline.

[0049] Furthermore, the specific structure of the high pressure nozzle 5 is as follows Figure 8 As shown, in Figure 8 From a viewing angle, the left threaded section 51 is threadedly connected to the external pipe, and the right threaded section 52 is threadedly connected to the internal threaded section in the mounting hole 12. The cleaning liquid is sprayed out from the injection hole 54 through the needle tube 53. The threaded connection facilitates the rapid assembly of the high-pressure nozzle 5, the upper die head 1 and the external pipe.

[0050] Furthermore, the coating die also includes a control module, and multiple high-pressure nozzles 5 are controlled by the control module to be turned on / off individually or in groups. In this way, the on / off of the high-pressure nozzles 5 at different positions can be flexibly adjusted as needed to improve the cleaning effect.

[0051] The following describes the cleaning process of the coating die head that can be cleaned online provided by the utility model:

[0052] First, clean the T-block groove 11 and the top surface 451 of the head of the T-block 4. When cleaning, open the drain hole 10 and control the on / off of each high-pressure nozzle 5 separately or in groups to control the on / off of the high-pressure nozzle 5 so that the T-block groove 11 and the top surface 451 of the head of the T-block 4 are circulated from the middle of the length direction of the T-block groove 11 to both sides (the flow diagram of the cleaning liquid is shown in FIG. Figure 9 The cleaning fluid is then circulated from the drain holes 10 to the waste liquid collection tank. The reason why all high-pressure nozzles 5 are not fully opened is that the internal space of the T-block groove 11 is narrow. When all high-pressure nozzles 5 are opened simultaneously to clean the inside of the T-block groove 11, the flow rate of the cleaning fluid in the T-block groove 11 will be too large, and the drain holes 10 on both sides will not be able to discharge the cleaning fluid in time, causing the cleaning fluid to fill up the T-block groove 11. When the cleaning fluid does not exceed the spray hole 54 of the high-pressure nozzle 5, the cleaning range of the high-pressure nozzle 5 will be greatly affected.

[0053] Then clean the gap 42 between the T blocks 4. During cleaning, close the drain hole 10, and all the high-pressure nozzles 5 need to be opened at the same time. This is because the gap 42 between the T blocks 4 is too small. If the drain holes 10 on both sides are opened, the cleaning liquid will be continuously discharged from the drain hole 10, resulting in insufficient pressure of the cleaning liquid in the T-block groove 11, and it will be difficult for the cleaning liquid to enter the gap 42 between the T blocks 4. Only when the drain hole 10 is closed and all the high-pressure nozzles 5 are opened at the same time, the pressure of the cleaning liquid in the T-block groove 11 will gradually increase, and finally the pressure of the cleaning liquid in the T-block groove 11 will be equal to the pressure of the cleaning liquid at the injection hole 54. Under the action of pressure, the cleaning liquid can flow in the gap 42 between the T blocks 4, and be discharged into the waste liquid collection tank through the slurry chamber 21 and the feed channel 22, thereby cleaning the residual slurry in the T-block groove 11.

[0054] Finally, close the cleaning liquid switch valve and open the high-pressure gas switch valve. The high-pressure gas enters the T-block groove 11 through the high-pressure nozzle 5 and blows the residual cleaning liquid in the T-block groove 11 out of the drain hole 10 into the waste liquid collection tank.

[0055] It should be emphasized that the drainage holes 10 on both sides of the length direction of the T-block groove 11 can not only be used to discharge the cleaning liquid during the cleaning process, but also can be used for pressure relief during the coating process. If the drainage holes 10 are not provided, the coating die head will have the problem that the actuator cannot be adjusted during the coating process. This is because during the long coating process, a part of the slurry will enter the T-block groove 11 through the gap 42 between the T-blocks 4. When the T-block groove 11 is full of slurry above the top surface 451 of the head, since the slurry is incompressible and a sealing ring is provided on the T-block 4, when the T-block 4 moves upward, the slurry cannot move upward, and there is pressure in the slurry chamber 21 and the coating slit 3. It will be difficult for the slurry to be discharged from the gap 42 between the T-blocks 4 to the coating slit 3, resulting in the T-block 4 being obstructed from adjusting and affecting the uniformity of the coating. If a drainage hole 10 is designed, even if the T-block groove 11 is filled with slurry, when the T-block 4 is adjusted upward, the space above the top surface 451 of the head of the T-block 4 in the T-block groove 11 will be reduced, and the slurry above the top surface 451 of the head of the T-block 4 in the T-block groove 11 will be squeezed, so that the excess slurry will be discharged from the drainage holes 10 on both sides into the slurry storage tank.

[0056] In short, the online cleanable coating die head provided by the utility model not only improves the cleaning efficiency of the T-block 4 and the T-block groove 11 and reduces the cleaning workload, but also solves the problem of the T-block 4 being obstructed from adjusting due to the accumulation of slurry in the T-block groove 11, thereby improving the coating quality and efficiency.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A coating die head that can be cleaned online, the coating die head comprising an upper die head (1) and a lower die head (2) arranged opposite to each other, a coating slit (3) formed between the upper die head (1) and the lower die head (2), the coating slit (3) respectively communicating with a T-block groove (11) in the upper die head (1) and a slurry cavity (21) in the lower die head (2), the slurry cavity (21) also communicating with a feed channel (22) in the lower die head (2), a plurality of T-blocks (4) being slidably mounted in the T-block groove (11), characterized in that: The upper die head (1) is also provided with a plurality of mounting holes (12), one end of the mounting hole (12) is connected to the T-block groove (11), and the other end passes through the outer wall of the upper die head (1). The coating die head also includes a plurality of high-pressure nozzles (5), and the plurality of high-pressure nozzles (5) are correspondingly installed in the plurality of mounting holes (12). The injection end of the high-pressure nozzle (5) having the injection hole (54) is located in the upper die head (1).

2. The coating die head capable of online cleaning according to claim 1, characterized in that: The upper die head (1) is also provided with drainage holes (10) at both ends in its length direction, the drainage holes (10) are connected to the T-block groove (11), and the location of the drainage holes (10) is lower than the location of the injection hole (54).

3. The coating die head capable of online cleaning according to claim 1 or 2, characterized in that: The T-block (4) comprises a root (43), a neck (44) and a head (45) connected in sequence from top to bottom. The width of the root (43) is greater than the width of the neck (44) and smaller than the width of the head (45), so as to form a groove (41) on the T-block (4) corresponding to the neck (44), and the injection end enters the groove (41).

4. The coating die head capable of online cleaning according to claim 3, characterized in that: The groove (41) is an annular groove.

5. The coating die head capable of online cleaning according to claim 3, characterized in that: The T-block groove (11) includes a first section (111), a second section (112) and a third section (113) connected in sequence from top to bottom. The width of the third section (113) is greater than the width of the first section (111) and smaller than the width of the second section (112). The root (43), the neck (44) and the head (45) are respectively arranged corresponding to the first section (111), the second section (112) and the third section (113).

6. The coating die head capable of online cleaning according to claim 1, characterized in that: One end of the mounting hole (12) is connected to the T-block groove (11), and the other end passes through the inclined surface (13) or the front surface (14) or the back surface (15) or the top surface (16) of the upper die head (1).

7. The coating die head capable of online cleaning according to claim 1, characterized in that: The access end of the high-pressure nozzle (5) is connected in parallel to a high-pressure cleaning liquid access pipeline and a high-pressure gas access pipeline, which are both in a passage state. The access end is the end of the high-pressure nozzle (5) opposite to the injection end.

8. The coating die head capable of online cleaning according to claim 7, characterized in that: The access end is threadedly connected to the mounting hole (12).

9. The coating die head capable of online cleaning according to claim 1, characterized in that: The injection hole (54) is opened on one side of the injection end, or the injection holes (54) are opened on two opposite sides.

10. The coating die head capable of online cleaning according to claim 1, characterized in that: It also includes a control module, and the plurality of high-pressure nozzles (5) are controlled by the control module to be turned on / off individually or in groups.

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