Adjustable uniform gluing structure of coating machine

Abstract

The invention relates to the technical field of coating machines, in particular to an adjustable coating machine uniform gluing structure which comprises a lower rack and an upper rack, a supporting roller used for supporting a material film is horizontally and rotatably mounted on the lower rack, a sliding groove is vertically formed in the lower rack, and a sliding rod corresponding to the sliding groove is vertically and fixedly mounted at the bottom of the upper rack; the upper rack is connected with the lower rack in a sliding mode, a coating roller is horizontally and rotatably installed on the upper rack, a flattening assembly is further arranged on the upper rack and comprises an annular groove formed in the supporting roller, and an air nozzle used for blowing air towards the interior of the annular groove is further arranged on the upper rack. When the coating roller is used for coating a material film, the air nozzle blows the material film at the position in contact with the coating roller towards the interior of the annular groove, so that the material film at the position in contact with the coating roller is pulled towards the axis direction of the coating roller, the material film is flattened in the coating process, wrinkles are avoided, and the coating quality of the material film is improved. And the coating uniformity of the material film is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating machines, in particular to a uniform glue coating structure of an adjustable coating machine. BACKGROUND

[0002] A coating machine is a machine used for coating materials such as glue, paint, or ink on the surface of materials. Coating machines are mainly used for surface coating process production of materials such as films and paper.

[0003] Coating machines generally have brush type, doctor blade type, and roller type according to the coating method. Among them, the roller type coating machine is the most common coating machine. The roller type coating machine is to let the material pass between two parallel rollers, one of which is a coating roller responsible for coating the paint on the material, and the other is a supporting roller to support from the other side of the material to ensure that the coating roller can contact the material and coat the paint on the material.

[0004] During the coating process, the coating machine is prone to uneven coating of the paint on the material. In order to improve the coating effect of the coating machine, the prior art has made certain upgrades to the coating machine. For example, the Chinese utility model patent with the application number CN202220720042.2 and the name "a coating machine with adjustable spacing" has improved the coating machine. By making the spacing between the two roller shafts through which the material is coated adjustable, the coating uniformity of the coating machine is improved to some extent.

[0005] However, in actual production process, uneven coating still occurs. The specific reason is that the material film cannot be completely flattened between the coating roller and the supporting roller of the coating machine when it passes through them, that is, the material film is prone to wrinkles. The paint is difficult to enter the wrinkles and contact the material film, which leads to uneven coating. The thinner the coated material film, the more prone to wrinkles during the coating process.

[0006] Therefore, a uniform glue coating structure of an adjustable coating machine is proposed to solve the problem of uneven coating caused by wrinkles during the coating process of the material film. SUMMARY

[0007] The purpose of the present application is to provide a uniform glue coating structure of an adjustable coating machine to solve the problem of uneven coating caused by wrinkles during the coating process of the material film.

[0008] To achieve the above purpose, the present application provides the following technical solutions:

[0009] The application discloses a uniform gluing structure of an adjustable coating machine, which comprises a lower frame and an upper frame, a supporting roller for supporting a material film is horizontally rotatably arranged on the lower frame, a sliding groove is vertically arranged on the lower frame, a sliding rod corresponding to the sliding groove is vertically and fixedly arranged on the bottom of the upper frame, the sliding rod on the upper frame is slidably inserted into the sliding groove so that the upper frame is slidably connected with the lower frame, a coating roller is horizontally rotatably arranged on the upper frame, the coating roller is parallel to the supporting roller and vertically above the supporting roller, and an adjusting assembly for adjusting the distance between the supporting roller and the coating roller is further arranged on the lower frame, wherein a flattening assembly is further arranged on the upper frame, the flattening assembly comprises a ring groove arranged on the supporting roller, the ring groove is staggered with a coating area of the coating roller in the vertical direction, an air nozzle for blowing air is further arranged on the upper frame, an air outlet of the air nozzle is arranged downward, the air nozzle is used for blowing air into the ring groove, and the air nozzle is located on the line connecting the centers of the coating roller and the supporting roller.

[0010] The upper frame is slidably connected with the lower frame, the distance between the coating roller and the supporting roller can be conveniently adjusted through the adjusting assembly, and the uniformity of coating of the material film is improved. In addition, the non-coating area of the material film is blown by the air nozzle when the material film is coated, the non-coating area of the material film located on the same line with the contact position between the material film and the coating roller is blown by the air nozzle when the material film contacts the coating roller, the non-coating area of the material film is forced to be recessed in the ring groove, the material film is pulled, the material film can be subjected to the pulling force along the axial direction of the coating roller when the material film contacts the coating roller, and thus the material film can be tightly stretched when the coating roller adheres the coating material to the material film, so that the coating effect is not influenced by the wrinkles of the material film.

[0011] Preferably, the flattening assembly further comprises a pressing wheel rotatably arranged on the upper frame, and the ring groove is located between the pressing wheel and the end face of the coating roller in the vertical direction. The pressing wheel can press the non-coating area of the material film, the material film is pressed towards the supporting roller, and the material film at the non-coating area is not pulled into the ring groove when the air nozzle blows air, but the film at the coating area is pulled and flattened. The flattening stability of the equipment to the material film is improved, and the uniformity of coating is ensured.

[0012] Preferably, a protective shell is arranged outside the air nozzle, the air nozzle is completely covered in the protective shell, a first air outlet is arranged at the bottom of the protective shell and located directly below the air nozzle, a sealing film is arranged at the first air outlet, and the sealing film is used for sealing the first air outlet. When the air nozzle blows air, the sealing film is protruded downward and extends into the ring groove.

[0013] The protective shell helps to limit the airflow, prevent the air nozzle from blowing the gas to the material film that has been coated, avoid the rapid cooling of the glue after the airflow, cause the glue to harden quickly on the material film, and avoid affecting the subsequent processing of the material film. After the sealing film is set, the air flow can extrude the sealing film when the air nozzle blows, and the sealing film protrudes downward and bulges. The bulging sealing film can extrude the material film below to the inside of the ring groove, thereby protecting the material film from being pulled and flattened.

[0014] In addition, since the protective shell and the sealing film limit the airflow blown by the air nozzle, they can also prevent the airflow from blowing and spreading on the material film to disturb the distant material film, avoid the material film from being unstable during transportation, and ensure the stability of the equipment operation.

[0015] By using the airflow to support the sealing film downward to press and flatten the material film, compared to directly using a mechanical structure to press and flatten the material film, the sealing film can automatically adapt and press the material film after adjusting the distance between the coating roller and the support roller, without the need for additional adjustment. The sealing film and the airflow are less likely to damage the material film when pressing the material film.

[0016] Preferably, the axis of the pressure roller is perpendicular to the common plane of the axis of the coating roller and the axis of the support roller, a plurality of extrusion pieces are arranged on the side wall of the pressure roller, the plurality of extrusion pieces are uniformly distributed on the pressure roller based on the axis of the pressure roller, the extrusion pieces are made of elastic plastic pieces, the lowest point of the extrusion pieces is lower than the lowest point of the coating roller when the extrusion pieces are located at the lowest point of the pressure roller, a second air outlet is also arranged on the protective shell, the second air outlet is located on the lower side of the pressure roller and blows horizontally away from the coating roller, and the gas blown out of the second air outlet impacts the extrusion pieces on the pressure roller and drives the pressure roller to rotate. The flexible extrusion pieces can stably press the material film onto the support roller, avoiding the situation that the pressure roller cannot press the material film onto the support roller after adjusting the distance between the coating roller and the support roller by the adjusting assembly, thereby ensuring the stability and effect of the equipment operation.

[0017] The axis of the pressure roller is perpendicular to the common plane of the axis of the coating roller and the axis of the support roller, and the gas blown out of the second air outlet is used to blow the extrusion pieces on the pressure roller, thereby causing the pressure roller to rotate. When the pressure roller rotates, the extrusion pieces can move and press the material film, pull the material film away from the coating roller, further help to pull and flatten the material film, further avoid wrinkles during the coating process of the material film, and improve the coating effect of the material film.

[0018] Preferably, the air outlet of the air nozzle is downwardly aligned with the first air blowing port, and an inclined angle a between the air nozzle and the vertical direction is formed, the angle of the inclined angle a is between 30° and 60°, and the air nozzle is inclined towards the direction of the second air blowing port. Aligning the first air blowing port facilitates the air flow to quickly inflate the sealing film and extrude and flatten the material film below when the air nozzle blows air towards the first air blowing port. The air outlet of the air nozzle is inclined towards the second air blowing port, so that after the air flow impacts the sealing film, the air flow can be guided along the film wall of the sealing film to the second air blowing port, which helps to improve the flow rate of the air blown by the second air blowing port, thereby ensuring the rotation effect of the pressure roller.

[0019] The inclined angle a is set between 30° and 60°, because when the angle is greater than 60°, the force perpendicular to the film surface of the sealing film after the air flow blown by the air nozzle contacts the sealing film becomes small, which affects the downward bulging of the sealing film and further affects the flattening effect of the material film. When the inclined angle a is less than 30°, the air flow after impacting the sealing film flows upward inside the protective shell and forms a turbulent flow, which easily hinders the air flow blown out of the air outlet of the air nozzle.

[0020] Preferably, the front and rear sides of the extrusion piece are provided with baffles, the baffles are made of smooth plastic material, the baffles on the extrusion piece form a U-shaped portion in the shape of "U", and when the extrusion piece is perpendicular to the air outlet direction of the second air blowing port, the opening of the U-shaped portion is directed towards the direction of the second air blowing port. The air flow is easy to escape after moving away from the air outlet, and the U-shaped portion can reduce the escape speed of the air flow blown by the second air blowing port, and as much as possible, the air flow is gathered to provide power for the rotation of the pressure roller, which helps to ensure the rotation of the pressure roller and further ensures the flattening effect of the material film by the equipment. At the same time, because the material film moves perpendicular to the side of the extrusion piece during coating, the setting of the baffle makes the side thickness of the extrusion piece higher, avoiding the material film being torn by the side wall of the extrusion piece.

[0021] Preferably, the end of the extrusion piece away from the pressure roller is provided with a friction portion, and the friction portion is made of soft rubber material to increase the friction between the extrusion piece and the material film. The friction portion increases the friction between the extrusion piece and the material film, which helps to better pull the material film along the direction of the coating roller axis when the pressure roller rotates, further ensuring the flattening effect of the material film. The friction portion made of soft rubber material can also reduce the impact damage to the material film, avoiding damage to the material film. In addition, since the extrusion piece will hit the material film and the supporting roller, the soft friction portion also helps to reduce noise and vibration.

[0022] Preferably, the middle of the baffle plate is provided with a avoiding slot, and the avoiding slot is V-shaped. The avoiding slot is provided, so that the extrusion piece can be bent and avoided when the extrusion piece is in extrusion contact with the material film and is bent. The extrusion piece cannot be smoothly bent when it is in extrusion contact with the material film, which causes the pressure roller to be stuck, thereby ensuring the stability of the equipment operation. The V-shaped avoiding slot is larger at the opening than at the bottom, and compared with the U-shaped groove, the V-shaped avoiding slot has a larger avoiding space when the baffle plate is bent.

[0023] Preferably, a plurality of grooves are formed on the friction part, the plurality of grooves are uniformly distributed on the friction part, and the grooves are parallel to the axis of the pressure roller. The grooves parallel to the axis of the pressure roller are in the same direction as the conveying direction of the material film, which can reduce the resistance of the friction part to the film during film conveying, and will not affect the friction force applied by the friction part to the material film in the direction of the coating roller axis.

[0024] Preferably, the cross-sectional shape of the annular groove is V-shaped. The V-shaped annular groove has a larger opening area, which helps the sealing film to better contact and apply force to the material film when the sealing film protrudes downward, facilitates the extrusion and pulling of the material film towards the inside of the annular groove, and further improves the flattening effect on the material film.

[0025] Since the supporting roller also rotates, the angle between the surface of the supporting roller and the side wall of the annular groove is easy to scratch the material film when the material film is extruded into the inside of the annular groove. Compared with the annular groove perpendicular to the supporting roller, the V-shaped annular groove has a smoother transition from the roller surface to the side wall of the annular groove, which can avoid scratching the material film when the material film is extruded towards the inside of the annular groove, and ensures the stable operation of the coating process.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1. The adjustable coating machine uniform gluing structure designed by the present application blows the material film in the same straight line as the contact position of the coating roller towards the inside of the annular groove when the coating roller is coating the material film, thereby pulling the material film at the contact position of the coating roller towards the direction of the coating roller axis, flattening the material film during coating, avoiding wrinkles, and ensuring the uniformity of the material film coating.

[0028] 2. The adjustable coating machine uniform gluing structure designed by the present application is also provided with a pressure roller, which presses the material film, helps to improve the effect and stability of material flattening, and the pressure roller is provided with a plurality of elastic extrusion pieces, which can ensure that the material film is contacted and pressed after the distance between the coating roller and the supporting roller is adjusted, and further improves the use stability of the equipment.

[0029] 3、The even coating structure of the adjustable coating machine is designed, the air nozzle is covered by setting the protective shell, the first air outlet is formed on the protective shell, and the sealing film is covered at the first air outlet, which can ensure that the gas blown by the air nozzle can pull down the material film to make it flat, can avoid the influence of the gas blown by the air nozzle on the coating on the material film, and can also discharge the gas in the protective shell from the second air outlet, so that the airflow is used to drive the compression wheel to rotate, and the flattening effect on the material film is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a perspective view of the material film passing through the coating roller and the supporting roller in the present application;

[0031] Figure 2 It is a front view of the present application;

[0032] Figure 3 It is an enlarged view of E in the present application; Figure 2

[0033] Figure 4 It is a schematic view of the internal structure of the protective shell in the present application;

[0034] Figure 5 It is a schematic view of the flow direction of the gas blown by the air nozzle in the present application;

[0035] Figure 6 It is a perspective view of the present application when the material film is not loaded;

[0036] Figure 7 It is an enlarged view of F in the present application; Figure 6

[0037] Figure 8 It is a perspective view of the compression wheel in the present application.

[0038] In the figure: 1, lower rack; 2, upper rack; 3, supporting roller; 4, sliding groove; 5, sliding rod; 6, coating roller; 7, adjusting assembly; 8, ring groove; 9, air nozzle; 10, compression wheel; 11, protective shell; 12, first air outlet; 13, extrusion piece; 14, second air outlet; 15, baffle; 16, U-shaped part; 17, friction part; 18, material film; 19, driving assembly; 20, sealing film; 21, avoiding groove; 22, groove; A, material conveying direction; B, coating area; C, blank area; α, inclination angle of air nozzle and vertical direction; C1, rotation direction of compression wheel. DETAILED DESCRIPTION

[0039] Please refer to Figures 1 to 8 , the present application provides an even coating structure of an adjustable coating machine, and the technical scheme is as follows:

[0040] ​​A uniform coating structure of an adjustable coating machine, referring to Figure 1 、 Figure 2 and Figure 7 , including a lower rack 1 and an upper rack 2, the lower rack 1 is horizontally rotatably installed with a supporting roller 3 for supporting a material film 18, the lower rack 1 is vertically provided with a sliding groove 4, the upper rack 2 is vertically fixedly installed with a sliding rod 5 corresponding to the sliding groove 4, the sliding rod 5 on the upper rack 2 is slidingly inserted into the sliding groove 4 to slidingly connect the upper rack 2 with the lower rack 1, the upper rack 2 is horizontally rotatably installed with a coating roller 6, the coating roller 6 is parallel to the supporting roller 3 and located directly above the supporting roller 3, the lower rack 1 is further provided with an adjusting assembly 7 for adjusting the distance between the supporting roller 3 and the coating roller 6, the adjusting assembly 7 in this embodiment is an electric cylinder. Of course, the adjusting assembly 7 can also be replaced by a mechanism or device capable of driving the upper rack 2 to move up and down. The upper rack 2 is further provided with flattening assemblies, two flattening assemblies are respectively located at both ends of the coating roller 6 and are symmetrically arranged about the coating roller 6. The area corresponding to the width of the coating roller 6 is the coating area B, the area outside the coating roller 6 is the blank area C, the coating roller 6 will not coat the material film 18 in the blank area C, that is, the blank area C is the non-coating area. The upper rack 2 is further fixedly installed with a driving assembly 19, the driving assembly 19 is an electric motor for driving the coating roller 6 to rotate.

[0041] Referring to Figures 2 to 5 , the flattening assembly includes a ring groove 8 provided on the supporting roller 3, the cross-sectional shape of the ring groove 8 is "V" shape. The ring groove 8 is staggered with the coating area B of the coating roller 6 in the vertical direction, the upper rack 2 is further provided with an air nozzle 9 for blowing air, the air nozzle 9 is aligned with the ring groove 8 in the vertical direction, the air outlet of the air nozzle 9 is downwardly arranged, the air nozzle 9 is in communication with an external air supply assembly for blowing air into the ring groove 8, and the air nozzle 9 is located on the line connecting the centers of the coating roller 6 and the supporting roller 3. The air nozzle 9 is provided with a protective shell 11, the air nozzle 9 is completely covered in the protective shell 11, the bottom of the protective shell 11 is provided with a first air outlet 12, the first air outlet 12 is located directly below the air nozzle 9, a sealing film 20 is arranged at the first air outlet 12, the sealing film 20 is used to seal the first air outlet 12.

[0042] Referring to Figures 2 to 8The flattening assembly further comprises a press wheel 10 rotatably mounted on the upper frame 2, and the ring groove 8 is located between the press wheel 10 and the end face of the coating roller 6 in the vertical direction. The axis of the press wheel 10 is perpendicular to the common plane of the axis of the coating roller 6 and the axis of the supporting roller 3, and a plurality of extrusion pieces 13 are arranged on the side wall of the press wheel 10. Each extrusion piece 13 is provided with a friction part 17 at the end away from the press wheel 10, and the friction part 17 is made of soft rubber material to increase the friction between the extrusion piece 13 and the material film 18. A plurality of grooves 22 are arranged on the friction part 17, and the grooves 22 are parallel to the axis of the press wheel 10. The plurality of extrusion pieces 13 are uniformly distributed on the press wheel 10 based on the axis of the press wheel 10, and the extrusion pieces 13 are made of elastic plastic pieces. When the extrusion pieces 13 are located at the lowest point of the press wheel 10, the lowest point of the extrusion pieces 13 is lower than the lowest point of the coating roller 6. A second air outlet 14 is arranged on the protective shell 11, and the second air outlet 14 is located on the lower side of the press wheel 10 and horizontally faces away from the coating roller 6. The air outlet of the air nozzle 9 is aligned with the first air outlet 12 and is inclined to the direction of the second air outlet 14. When the air nozzle 9 is inclined, the inclination angle between the air nozzle 9 and the vertical direction is 45°.

[0043] The front and rear sides of the extrusion piece 13 are provided with baffles 15 made of smooth plastic material. The baffles 15 on the extrusion piece 13 cooperate with the extrusion piece 13 to form a U-shaped part 16 in the shape of "U". When the extrusion piece 13 is perpendicular to the air outlet direction of the second air outlet 14, the opening of the U-shaped part 16 faces the direction of the second air outlet 14. The middle of the baffle 15 is provided with a clearance groove 21 in the shape of "V".

[0044] In use, referring to Figure 1 and Figure 2 , the material film 18 is first passed between the coating roller 6 and the supporting roller 3, and then the distance between the coating roller 6 and the supporting roller 3 is controlled by the adjusting assembly 7 according to the process requirements. After the adjustment is completed, since the lowest point of the extrusion piece 13 is lower than the lowest point of the coating roller 6, the extrusion piece 13 will contact the material film 18 and press the material film 18 towards the surface of the supporting roller 3. At this time, the extrusion piece 13 will be bent under the pressure of the upper frame 2 and the supporting roller 3.

[0045] Then, referring to Figures 2 to 5, control drive assembly 19 driven coating roll 6 rotation, with the material film 18 to the material conveying direction A conveying, coating roll 6 one side with material film 18 contact and coating roll 6 on the glue coating adhered to the material film 18. At this time, start air nozzle 9, with the outside of the gas supply assembly in communication with air nozzle 9 begins to evenly spray gas flow, gas flow aimed at the first air outlet 12, and then impact the first air outlet 12 at the sealing film 20, sealing film 20 down. The sealing film 20 down after the blank area C at the outlet below the material film 18 to the ring groove 8 inside press, because the ring groove 8 at the material film 18 under stress, then the ring groove 8 at the material film 18 will be on both sides of the material film 18 to the direction of the ring groove 8 pull, because the extrusion piece 13 on the ring groove 8 side of the blank area C press, then the material film 18 at the coating area B will be pulled to the direction of the ring groove 8, the material film 18 at the coating area B is flattened, reduce the material film 18 at the coating area B on the appearance of wrinkles, improve the uniformity of the material film 18 coating.

[0046] Reference Figure 3 And Figure 5 When the gas flow from the air nozzle 9 impact on the sealing film 20, under the guidance of the sealing film 20, the gas flow is guided to the direction of the second air outlet 14, and from the second air outlet 14 at the outside of the protective housing 11. And when the gas flow from the second air outlet 14, the gas flow will impact the extrusion piece 13 on the pressure roller 10 and into the U-shaped part 16 inside, the gas flow to the pressure roller 10 a tangent direction of force, and drive the pressure roller 10 begin to rotate around the axis along the C1 direction. When the pressure roller 10 rotates, the extrusion piece 13 on the pressure roller 10 to the material film 18 a coating roller 6 axis direction of friction, and in a extrusion piece 13 follow the pressure roller 10 rotation and with the material film 18, the next extrusion piece 13 follow the rotation of the pressure roller 10 and press to the material film 18 on the material film 18 continue to maintain the pressure. The friction force of the extrusion piece 13 to the material film 18 can pull the material film 18 to move away from the direction of the coating roller 6, further pull the material film 18 at the coating area B flattened, further avoid the material film 18 in the coating coating due to wrinkles and uneven situation.

[0047] It should be noted that the air nozzle 9, the first air outlet 12 and the extrusion piece 13 are located on the same straight line, and to be located on the coating roller 6 and the center line of the support roller 3. So you can flatten the material film 18 at the coating area B in the position of the material film 18 and the coating roller 6 contact, improve the uniformity of the material film 18 coating.

[0048] The above describes one specific embodiment of the present application in detail in combination with the drawings, but the present application is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, replacements and variations of the embodiment can be made without departing from the principles and ideas of the present application, and should still fall within the protection scope of the present application.

Claims

1. An adjustable coating machine uniform glue coating structure, comprising a lower frame (1) and an upper frame (2), wherein a support roller (3) for supporting a material film (18) is horizontally rotatably mounted on the lower frame (1), a slide groove (4) is vertically opened on the lower frame (1), a slide rod (5) corresponding to the slide groove (4) is vertically fixedly mounted on the bottom of the upper frame (2), the slide rod (5) on the upper frame (2) is slidably inserted into the slide groove (4), a coating roller (6) is horizontally rotatably mounted on the upper frame (2), the coating roller (6) is parallel to the support roller (3) and is located directly above the support roller (3), and an adjustment component (7) for regulating the distance between the support roller (3) and the coating roller (6) is also provided on the lower frame (1), characterized in that The upper frame (2) is also provided with a flattening component, the flattening component comprising an annular groove (8) provided on the support roller (3), the annular groove (8) being staggered with the coating area of ​​the coating roller (6) in the vertical direction, and an air nozzle (9) for blowing air is also provided on the upper frame (2), the air outlet of the air nozzle (9) being arranged downward, the air nozzle (9) being used for blowing air toward the inside of the annular groove (8), and the air nozzle (9) being located on the line connecting the centers of the coating roller (6) and the support roller (3).

2. The adjustable coating machine uniform glue coating structure according to claim 1, characterized in that: The flattening assembly further comprises a pressing wheel (10), which is rotatably mounted on an upper frame (2) at one end of the coating roller (6). The pressing wheel (10) is used to press the material film (18) during coating, and the vertical projection of the annular groove (8) is located between the pressing wheel (10) and the end face of the coating roller (6).

3. The adjustable coating machine uniform glue coating structure according to claim 2, characterized in that: A protective shell (11) is provided outside the air nozzle (9), and the air nozzle (9) is completely covered inside the protective shell (11). A first blowing port (12) is provided at the bottom of the protective shell (11), and the first blowing port (12) is located directly below the air nozzle (9). A sealing film (20) is provided at the first blowing port (12), and the sealing film (20) is used to seal the first blowing port (12); when the air nozzle (9) blows air, the sealing film (20) bulges downward and extends into the annular groove (8).

4. The adjustable coating machine uniform glue coating structure according to claim 3, characterized in that: The axis of the pressing wheel (10) is perpendicular to the common plane where the axis of the coating roller (6) and the axis of the supporting roller (3) are located. A plurality of extrusion sheets (13) are provided on the side wall of the pressing wheel (10). The plurality of extrusion sheets (13) are evenly distributed on the pressing wheel (10) with the axis of the pressing wheel (10) as the reference. The extrusion sheets (13) are all made of elastic plastic sheets. When the extrusion sheet (13) is located at the lowest point of the pressing wheel (10), the lowest point of the extrusion sheet (13) is lower than the lowest point of the coating roller (6). A second blowing port (14) is also provided on the protective shell (11). The second blowing port (14) is located on the lower side of the pressing wheel (10), and the blowing direction is horizontally facing away from the coating roller (6); when the second blowing port (14) discharges gas, the gas impacts the extrusion sheet (13) on the pressing wheel (10) and drives the pressing wheel (10) to rotate.

5. The adjustable coating machine uniform glue coating structure according to claim 4, characterized in that: The air outlet of the air nozzle (9) is downwardly aligned with the first air outlet (12), and an inclined angle α is formed between the air nozzle (9) and the vertical direction, wherein the angle of the inclined angle α is between 30° and 60°, and the air nozzle (9) is tilted in the direction of the second air outlet (14).

6. The adjustable coating machine uniform glue coating structure according to claim 4, characterized in that: Baffles (15) are provided on both the front and rear sides of the extrusion sheet (13). The baffles (15) are made of smooth plastic material. The baffles (15) on the extrusion sheet (13) cooperate with the extrusion sheet (13) to form a "U"-shaped U-shaped portion (16). When the extrusion sheet (13) is perpendicular to the air outlet direction of the second air outlet (14), the opening of the U-shaped portion (16) faces the direction of the second air outlet (14).

7. The adjustable coating machine uniform glue coating structure according to claim 6, characterized in that: The end of the extrusion sheet (13) away from the pressing wheel (10) is provided with a friction portion (17), and the friction portion (17) is made of soft rubber material and is used to increase the friction between the extrusion sheet (13) and the material film (18).

8. The adjustable coating machine uniform glue coating structure according to claim 6, characterized in that: A avoidance groove (21) is provided in the middle of the baffle (15), and the avoidance groove is in a "V" shape.

9. The adjustable coating machine uniform glue coating structure according to claim 7, characterized in that: The friction portion (17) is provided with a plurality of grooves (22), the plurality of grooves are evenly distributed on the friction portion (17), and the grooves (22) are all parallel to the axis of the pressure wheel (10).

10. The adjustable coating machine uniform glue coating structure according to claim 1, characterized in that: The cross-sectional shape of the annular groove (8) is a "V" shape.

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