Multi-dimensional coating mechanism

Abstract

The invention relates to a multi-dimensional coating mechanism which comprises a conveying platform used for conveying a base material, a mounting frame is arranged on the conveying platform, a plurality of coating units arranged in a matrix mode are arranged on the mounting frame, and the coating units are independently selected from one of a piezoelectric spraying device, an airless spraying device and an air pressure spraying device. The coating mechanism at least comprises a piezoelectric spraying device, an airless spraying device and an air pressure spraying device, and each coating unit is connected with an x-axis moving mechanism, a y-axis moving mechanism, a z-axis moving mechanism and a swing mechanism. The multi-dimensional coating mechanism has the characteristics that the piezoelectric spraying device, the airless spraying device and the air pressure spraying device are integrated, multiple coating modes can be achieved on the same platform, one device can meet multiple coating requirements, frequent replacement of the device or adjustment of a production line is not needed, and the production flexibility and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of coating machines, and in particular to a multi-dimensional coating mechanism. Background Art

[0002] Coating process is one of the core technologies in the industrial field and is widely used in industries such as electronics, medicine, food processing and materials science. In the coating process, it is usually necessary to coat the liquid, paste or other fluid materials evenly onto the substrate through a coating mechanism.

[0003] However, traditional coating mechanisms can usually only perform a single type of coating task. When faced with diverse product demands, it is usually necessary to replace different equipment or adjust the production line, which increases downtime and brings additional costs. At the same time, traditional coating equipment can usually only perform coating operations on a single layer or plane, and it is difficult to complete multiple coatings with different characteristics in one operation. Traditional coating mechanisms often involve multiple steps in coating multiple layers on the same substrate, which increases the complexity and time cost of production. Summary of the invention

[0004] The object of the present invention is to provide a multi-dimensional coating mechanism to solve the above problems.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-dimensional coating mechanism, comprising a conveying platform for conveying a substrate, a mounting frame is provided on the conveying platform, and a plurality of coating units arranged in a matrix are provided on the mounting frame, the coating units are independently selected from one of a piezoelectric spraying device, an airless spraying device, and a pneumatic spraying device, and the coating mechanism includes at least one piezoelectric spraying device, an airless spraying device and a pneumatic spraying device, each of the coating units is connected to an x-axis moving mechanism capable of driving the coating unit to move along the x-axis direction, a y-axis moving mechanism capable of driving the coating unit to move along the y-axis direction, a z-axis moving mechanism capable of driving the coating unit to move along the z-axis direction, and a swinging mechanism capable of controlling the coating unit to rotate around the y-axis.

[0006] As a further optimization scheme of the present invention, the piezoelectric spraying device includes a ceramic substrate and piezoelectric ceramics. A glue cavity is provided on the ceramic substrate, a vibration diaphragm is provided between the glue cavity and the piezoelectric ceramics, a nozzle panel is provided at the lower part of the glue cavity, and a nozzle hole connected to the glue cavity is provided on the nozzle panel.

[0007] As a further optimization solution of the present invention, the airless spraying device includes a high-pressure pump capable of extracting and pressurizing paint, the high-pressure pump is connected to a pressure accumulator, the pressure accumulator is connected to a filter, and the filter is connected to a first nozzle.

[0008] As a further optimization scheme of the present invention, the pneumatic spraying device includes a second nozzle and an air cover connected to the second nozzle, the air cover is provided with a first air hole located in the center of the air cover and capable of promoting the initial atomization of the paint, a second air hole capable of further breaking up the initially atomized paint droplets, and a third air hole opened on the side wall of the air cover and used to adjust the width and shape of the atomization pattern.

[0009] As a further optimization solution of the present invention, the y-axis moving mechanism includes a y-axis linear module, and the y-axis linear module is provided with a first moving block capable of driving a single coating unit to move along the y-axis linear module.

[0010] As a further optimization solution of the present invention, the x-axis moving mechanism includes an x-axis linear module connected to the first moving block, and the x-axis linear module is provided with a second moving block capable of driving a single coating unit to move along the x-axis linear module.

[0011] As a further optimization scheme of the present invention, the z-axis moving mechanism includes a z-axis linear module connected to the second moving block, and the z-axis linear module is provided with a third moving block capable of driving a single coating unit to move along the z-axis linear module.

[0012] As a further optimization solution of the present invention, the swing mechanism includes a rotating motor connected to the third moving block, the output shaft of the rotating motor extends along the y-axis direction, and the output shaft of the rotating motor is connected to a single coating unit.

[0013] As a further optimization scheme of the present invention, each of the coating units is connected to a PLC controller capable of controlling the coating time, coating amount, and coating type of a single coating unit, and the PLC controller is connected to the x-axis moving mechanism, the y-axis moving mechanism, the z-axis moving mechanism, and the swing mechanism.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The multi-dimensional coating mechanism integrates piezoelectric spraying device, airless spraying device and pneumatic spraying device, and can realize multiple coating methods on the same platform. Each coating unit can independently select and configure one of the three spraying methods mentioned above, so that one device can adapt to multiple coating needs without frequent equipment replacement or production line adjustment, thus improving production flexibility and efficiency;

[0016] 2. By arranging the coating units in a matrix and setting up x-axis, y-axis, z-axis moving mechanisms and swinging mechanisms, multiple coating units can flexibly adjust their positions and angles under the control of the x-axis, y-axis, z-axis moving mechanisms and swinging mechanisms, thereby forming multi-layer or multi-structure coatings with different characteristics and functions on the same substrate. Thus, complex multi-layer coating tasks can be completed in one operation, reducing production steps, complexity and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the piezoelectric spraying device in the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the airless spraying device in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the air pressure spraying device in the present invention;

[0021] Figure 5 The structure diagram of the coating unit in the present invention cooperates with the x-axis moving mechanism, the y-axis moving mechanism, the z-axis moving mechanism, and the swing mechanism. Figure 1 ;

[0022] Figure 6 The structure diagram of the coating unit in the present invention cooperates with the x-axis moving mechanism, the y-axis moving mechanism, the z-axis moving mechanism, and the swing mechanism. Figure 2 ;

[0023] Figure 7 It is a schematic diagram of the matrix arrangement and combination of various coating units in the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of the drug-gel mixed product produced by the present invention;

[0025] Fig. 9 The figure is a cross-sectional schematic diagram of a drug-gel mixed product produced by the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] like Figures 1 to 6As shown, the present invention discloses a multi-dimensional coating mechanism, including a conveying platform 1 for conveying a substrate, a mounting frame 2 is provided on the conveying platform 1, and a plurality of coating units 3 arranged in a matrix are provided on the mounting frame 2, the coating units 3 are independently selected from one of a piezoelectric spraying device 4, an airless spraying device 5, and a pneumatic spraying device 6, and the coating mechanism includes at least one piezoelectric spraying device 4, an airless spraying device 5 and a pneumatic spraying device 6, each coating unit 3 is connected to an x-axis moving mechanism 71 capable of driving the coating unit 3 to move along the x-axis direction, a y-axis moving mechanism 72 capable of driving the coating unit 3 to move along the y-axis direction, a z-axis moving mechanism 73 capable of driving the coating unit 3 to move along the z-axis direction, and a swinging mechanism 74 capable of controlling the coating unit 3 to rotate around the y-axis.

[0028] The conveying platform 1 is used to carry and convey the substrate to ensure that the substrate moves smoothly during the coating process. The mounting frame 2 serves as a mounting carrier for the coating unit 3 and provides mechanical support. The coating unit 3 is independently selected from one of a piezoelectric spray device 4, an airless spray device 5, and a pneumatic spray device 6, and the coating mechanism includes at least one piezoelectric spray device 4, an airless spray device 5, and a pneumatic spray device 6, so that the coating mechanism can perform different types of spraying tasks and meet diverse coating needs. The x-axis moving mechanism 71 can drive the coating unit 3 to move along the x-axis direction to achieve lateral position adjustment, improve the flexibility of the coating area, and adapt to substrates of different widths. The y-axis moving mechanism 72 can drive the coating unit 3 to move along the y-axis direction to achieve longitudinal position adjustment. The y-axis movement and the x-axis movement together constitute the precise control of the coating unit 3 in a two-dimensional plane. The z-axis moving mechanism 73 can drive the coating unit 3 to move along the z-axis direction, adjust the nozzle height, ensure that the spraying distance is appropriate, and improve the coating quality and accuracy. The swing mechanism 74 controls the coating unit 3 to rotate around the y-axis to achieve a fan-shaped swing arrangement, thereby increasing the flexibility and diversity of coating.

[0029] like Figure 7 As shown, in one embodiment, each coating unit 3 can be arranged and combined in the X-axis direction by the x-axis moving mechanism 71, so that the coating units 3 in the same row are arranged in parallel or staggered in the X-axis; each coating unit 3 can be arranged and combined in the Y-axis direction by the y-axis moving mechanism 72, so that the coating units 3 in the same column are arranged in parallel or staggered in the Y-axis; each coating unit 3 can be arranged and combined in the Z-axis direction by the z-axis moving mechanism 73, so that the coating units 3 are arranged in parallel or staggered in a piano-key-like lifting and lowering arrangement in the Z-axis; each coating unit fan-shaped can be arranged and combined at the angle of rotation around the y-axis by the swing mechanism 74, so that each coating unit 3 is arranged in parallel or swings in a fan-shaped manner.

[0030] The multi-dimensional coating mechanism integrates a piezoelectric spray device 4, an airless spray device 5 and a pneumatic spray device 6, and can realize multiple coating methods on the same platform. Each coating unit 3 can independently select and configure one of the three spray methods mentioned above, so that one device can adapt to a variety of coating needs, without the need to frequently replace equipment or adjust the production line, thereby improving the flexibility and efficiency of production; by arranging the coating units 3 in a matrix, and setting an x-axis moving mechanism 71, a y-axis moving mechanism 72, a z-axis moving mechanism 73 and a swinging mechanism 74, multiple coating units can flexibly adjust their positions and angles, thereby realizing the formation of multi-layer or multi-structure coatings with different characteristics and functions on the same substrate. Thereby, complex multi-layer coating tasks are completed in one operation, production steps are reduced, and complexity and time costs are reduced.

[0031] The piezoelectric spraying device 4 includes a ceramic substrate 41 and a piezoelectric ceramic 42. A glue cavity 43 is provided on the ceramic substrate 41. A vibration diaphragm 44 is provided between the glue cavity 43 and the piezoelectric ceramic 42. A nozzle panel 45 is provided at the lower part of the glue cavity 43. A nozzle hole 46 connected to the glue cavity 43 is provided on the nozzle panel 45.

[0032] The piezoelectric ceramic 42 can generate mechanical deformation by applying voltage, drive the vibration diaphragm 44 to vibrate, and then control the paint in the glue chamber 43 to be sprayed out from the nozzle hole 46, thereby achieving a high-precision, fast response and low-energy spraying effect.

[0033] The airless spray device 5 includes a high-pressure pump 51 capable of extracting and pressurizing paint. The high-pressure pump 51 is connected to a pressure accumulator 52 , the pressure accumulator 52 is connected to a filter 53 , and the filter 53 is connected to a first nozzle 54 .

[0034] The high-pressure pump 51 can extract the paint and pressurize it to a high-pressure state, ensuring that the paint can be sprayed out at high speed through the first nozzle 54. The accumulator 52 is connected after the high-pressure pump 51, and is used to store high-pressure paint and smooth pressure fluctuations to ensure the stability of the output pressure. The filter 53 can filter out impurities in the paint to prevent clogging of the nozzle and ensure the quality of spraying. The first nozzle 54 can spray the paint under high pressure through the small holes on the first nozzle 54, causing it to expand rapidly and break into extremely fine liquid mist, which is directly sprayed onto the surface of the substrate.

[0035] In one embodiment, the high-pressure pump 51 is pneumatic, and the airless spraying device 5 is composed of a compressed air inlet 56, a pressure regulating valve 57, a high-pressure pump 51, an accumulator 52, a filter 53, a stop valve 55, and a first nozzle 54 connected in sequence through a connecting pipe. The paint is pressurized to 98MPa-29.4MPa by the high-pressure pump 51, and the paint itself is not mixed with the compressed air, thereby realizing airless spraying.

[0036] The pneumatic spraying device 6 includes a second nozzle 61 and an air cover 62 connected to the second nozzle 61. The air cover 62 is provided with a first air hole 63 located in the center of the air cover 62 and capable of promoting the initial atomization of the paint, a second air hole 64 capable of further breaking up the initially atomized paint droplets, and a third air hole 65 opened on the side wall of the air cover 62 and used to adjust the width and shape of the atomization pattern.

[0037] The air cover 62 is connected to the second nozzle 61, and it integrates multiple air holes, which work together to optimize the atomization effect. The first air hole 63 is located in the center of the air cover 62 to promote the initial atomization of the paint. The second air hole 64 further breaks up the paint droplets initially atomized by the first air hole 63 to make it more delicate. The third air hole 65 is opened on the side wall of the air cover 62 to adjust the width and shape of the atomization pattern. By delivering the paint to the second nozzle 61 and inputting controllable compressed air into the second nozzle 61 at the same time, the second nozzle 61 cooperates with the air cover 62 to atomize the paint and spray the paint onto the coating substrate, thereby realizing air pressure spraying.

[0038] In one embodiment, in the coating units 3 arranged in a matrix, when the number of rows of the matrix is ​​greater than or equal to three, each row of coating units 3 includes at least one piezoelectric spray device 4, one airless spray device 5 and one pneumatic spray device 6 as its coating unit 3; when the number of columns of the matrix is ​​greater than or equal to three, each column of coating units 3 includes at least one piezoelectric spray device 4, one airless spray device 5 and one pneumatic spray device 6 as its coating unit 3, so as to ensure that the piezoelectric spray device 4, the airless spray device 5 and the pneumatic spray device 6 can cover the coating range.

[0039] The y-axis moving mechanism 72 includes a y-axis linear module 721 , on which a first moving block 722 capable of driving a single coating unit 3 to move along the y-axis linear module 721 is disposed.

[0040] In one embodiment, the y-axis linear module 721 includes a lead screw arranged along the y-axis direction, one end of the lead screw is connected to a motor, a plurality of first moving blocks 722 are arranged on the lead screw and can move linearly along the lead screw when the motor drives the lead screw to rotate, and the coating units 3 in the same column are all arranged on the same lead screw, thereby achieving consistency in relative position of the coating units 3 in the same column along the y-axis direction.

[0041] The x-axis moving mechanism 71 includes an x-axis linear module 711 connected to a first moving block 722 . The x-axis linear module 711 is provided with a second moving block 712 that can drive a single coating unit 3 to move along the x-axis linear module 711 .

[0042] The z-axis moving mechanism 73 includes a z-axis linear module 731 connected to the second moving block 712 . The z-axis linear module 731 is provided with a third moving block 732 capable of driving a single coating unit 3 to move along the z-axis linear module 731 .

[0043] In one embodiment, the x-axis linear module 711 and the z-axis linear module 731 are pneumatic linear modules, and the second moving block 712 and the third moving block 732 are driven to generate linear motion through the piston motion of the cylinder.

[0044] The swing mechanism 74 includes a rotary motor 741 connected to the third moving block 732 , an output shaft of the rotary motor 741 extends along the y-axis direction, and the output shaft of the rotary motor 741 is connected to a single coating unit 3 .

[0045] The rotating motor 741 is mounted on the third moving block 732, and its output shaft extends along the Y-axis direction. The coating unit 3 is connected to the output shaft of the rotating motor 741, so that the coating unit 3 can rotate or swing around the Y-axis as the motor rotates. In this way, the working angle of the coating unit 3 can be controlled to meet different coating requirements or process requirements.

[0046] Each coating unit 3 is connected to a PLC controller capable of controlling the coating time, coating amount, and coating type of the single coating unit 3 . The PLC controller is connected to the x-axis moving mechanism 71 , the y-axis moving mechanism 72 , the z-axis moving mechanism 73 , and the swing mechanism 74 .

[0047] In one embodiment, each coating unit 3 is connected to multiple paint tanks (not shown in the figure) through multiple material pumps, and the material pumps are controlled by a PLC controller to control each coating unit 3 to obtain paint from paint tanks of the same or different paint types, so as to control the paint type of the coating unit 3.

[0048] In one embodiment, the piezoelectric spray device 4, the airless spray device 5, and the pneumatic spray device 6 can adjust the unit spraying amount and start the spraying time interval through the PLC controller according to the coating graphics and quantification requirements, thereby controlling the spraying effect.

[0049] In one embodiment, the setting range of the coating amount can be from a few tenths of a gram per square meter to several hundred grams per square meter, and the coating accuracy error is ≤1 / 1000, thereby achieving a precise coating effect.

[0050] The PLC controller is connected to the x-axis moving mechanism 71, the y-axis moving mechanism 72, the z-axis moving mechanism 73, and the swing mechanism 74 and can control the coating time, coating amount, and coating type of a single coating unit 3, thereby ensuring that the coating unit 3 can flexibly adjust its position in three-dimensional space. And according to the coating process, the coating time, coating amount, and coating type of each coating unit 3 are adjusted to achieve precise quantitative multi-coating design. By setting the corresponding instructions through the PLC controller, strip coating, intermittent coating, dot coating, graphic coating, multi-layer coating and other coating effects can be performed.

[0051] The following is an example of a double-layer coating process using a multi-dimensional coating mechanism:

[0052] First, according to the specific coating process requirements, a PLC program is written to set the coating time, coating amount and coating type of each coating unit 3, and the paper feed speed and spray path of the substrate are preset to ensure the consistency and repeatability of the coating process. Then, the PLC controller adjusts the position of the nozzle hole 46 of the piezoelectric spray device 4 in the coating unit 3 near the upstream position of the conveying platform through the x-axis moving mechanism 71 and the y-axis moving mechanism 72 to ensure the coating coverage and position are accurate. Select the first coating suitable for the bottom coating, and convey it to the glue chamber 43 of the piezoelectric spray device 4 through the coating tank. Send a driving power signal to the piezoelectric ceramic 42 through the electrode to cause the piezoelectric ceramic to produce mechanical deformation. The piezoelectric ceramic 42 drives the vibration diaphragm 44 to vibrate, and the coating in the glue chamber 43 is sprayed out through the nozzle hole 46 on the nozzle panel 45. Then, while the substrate moves along the predetermined conveying path, a second coating operation is performed. The PLC controller adjusts the position of the second nozzle 61 of the air pressure spray device 6 in the coating unit 3 near the downstream position of the conveying platform through the x-axis moving mechanism 71 and the y-axis moving mechanism 72 to ensure the coating coverage and position are accurate. Then the appropriate coating is transported from the pressure tank to the air pressure spray device 6. The air pressure spray device 6 is started, and controllable compressed air is input to the air cover 62, and preliminary atomization and further crushing of the coating droplets are performed through the first air hole 63, the second air hole 64 and the third air hole 65. The coating is sprayed out through the second nozzle 61 to form fine and uniform atomized droplets, which are sprayed onto the surface of the substrate.

[0053] The spraying process of the piezoelectric spraying device 4 and the air pressure spraying device 6 is quantified and programmed by PLC to determine the coating spraying time and coating amount control of each coating unit 3. At the same time, the piezoelectric spraying device 4 and the air pressure spraying device 6 can be combined with the swing mechanism 74 to control the nozzle to rotate around the y-axis to optimize the spraying angle and pattern shape.

[0054] The above process solves the problem of precise quantitative multi-coating design that cannot be completed by some existing coating technologies, such as in-situ reduction reaction of graphene circuit boards, multi-layer coating technology for infrared heat insulation layers, multi-layer quantitative glue coating technology, surface functional micro-mesh coatings, and anti-scratch or anti-slip coatings. Moreover, the process can complete multiple coatings without interrupting the movement of the substrate, thus improving production efficiency and product quality.

[0055] The following is an embodiment of the process of applying a multi-dimensional coating mechanism to prepare a coating drug-gel mixed product, wherein the finished product of the drug-gel mixed product is as follows: Figure 7 , Figure 8 As shown, the drug content of the drug-adhesive mixed coating 82 is ≥70%, and the water-based pressure-sensitive adhesive coating 81 is used to improve the problem of insufficient drug loading at the medication location and improve the adhesiveness of the patch, and its drug content is ≤50%:

[0056] First, according to the specific coating process requirements, write a PLC program to set the coating time, coating amount and coating type of each coating unit 3, and preset the paper feed speed and spraying path of the substrate to ensure the consistency and repeatability of the coating process. Then, select the water-based pressure-sensitive adhesive coating and transport it to the glue chamber 43 of the piezoelectric spraying device 4 through the coating device. Send a driving power signal to the piezoelectric ceramic 42 through the electrode to cause the piezoelectric ceramic 42 to produce mechanical deformation. The piezoelectric ceramic drives the vibration diaphragm 44 to vibrate, and sprays the water-based pressure-sensitive adhesive coating in the glue chamber 43 through the nozzle hole 46 on the nozzle panel 45. At this time, the x-axis moving mechanism 71 controls each row of coating units 3 to be arranged in a straight line to ensure that the water-based pressure-sensitive adhesive is evenly applied to the surface of the substrate. Next, select the drug-glue mixed coating and transport it to the second nozzle 61 of the precision air pressure spraying device 6 through the coating device. Controllable compressed air is input to the air pressure spraying device 6, and preliminary atomization and further crushing of the coating droplets are performed through the auxiliary air hole 63, the central air hole 64 and the side air hole 65. The coating forms fine and uniform atomized droplets and sprays onto the surface of the substrate. At this time, the y-axis moving mechanism 72 controls the staggered arrangement of each column of coating units 3, so as to obtain the discontinuous dot coating of the drug-glue mixed coating. Finally, the water-based pressure-sensitive adhesive coating is selected and the coating is transported to the airless spraying device 5. The signal is output to the pressure regulating valve 57 to adjust the high-pressure pump 51, and the coating is sprayed from the first nozzle 54 through the accumulator 52, the filter 53, and the high-pressure hose, so that a high coating amount is simultaneously applied in the precisely controlled coating area. At this time, the x-axis moving mechanism 71 and the y-axis moving mechanism 72 adjust the position of the coating unit 3, and control the spraying time of the airless spraying device 5, so that the airless spraying device 5 completes strip coating in the X-axis direction and strip intermittent coating in the Y-axis direction.

[0057] The above process solves the drug-gel mixing problem of some medical patches, and solves the problems of insufficient viscosity between dry multi-layer composite drug-gels, easy drug-gel separation, insufficient drug loading in wet mixing, and insufficient viscosity of carrier materials after drug mixing.

[0058] The multi-dimensional coating mechanism disclosed in the present invention can replace or partially replace the existing cumbersome and complicated coating mechanisms, realize multi-purpose of one machine, multi-function of one machine, single-time multi-layer coating of one machine, single-time multi-layer and multi-structure coating of one machine, and intelligently complete the complex coating process requirements, especially solve the bottleneck of the existing technology, and can realize the coating requirements of some simple circuit board coating, some medical tape drug-glue mixed coating and other functional multi-coatings and multi-layers, and broaden the application of high-precision quantitative application of coating machines.

Claims

1. A multi-dimensional coating mechanism, characterized in that: The invention comprises a conveying platform (1) for conveying a substrate, wherein a mounting frame (2) is provided on the conveying platform (1), and a plurality of coating units (3) arranged in a matrix are provided on the mounting frame (2), wherein the coating units (3) are independently selected from one of a piezoelectric spraying device (4), an airless spraying device (5), and a pneumatic spraying device (6), and the coating mechanism comprises at least one piezoelectric spraying device (4), one airless spraying device (5), and one pneumatic spraying device (6), and each of the coating units (3) is connected to an x-axis moving mechanism (71) capable of driving the coating unit (3) to move along the x-axis direction, a y-axis moving mechanism (72) capable of driving the coating unit (3) to move along the y-axis direction, a z-axis moving mechanism (73) capable of driving the coating unit (3) to move along the z-axis direction, and a swinging mechanism (74) capable of controlling the coating unit (3) to rotate around the y-axis.

2. A multi-dimensional coating mechanism according to claim 1, characterized in that: The piezoelectric spraying device (4) comprises a ceramic substrate (41) and a piezoelectric ceramic (42); a glue cavity (43) is provided on the ceramic substrate (41); a vibration diaphragm (44) is provided between the glue cavity (43) and the piezoelectric ceramic (42); a nozzle panel (45) is provided at the lower part of the glue cavity (43); and a nozzle hole (46) connected to the glue cavity (43) is provided on the nozzle panel (45).

3. A multi-dimensional coating mechanism according to claim 1, characterized in that: The airless spraying device (5) comprises a high-pressure pump (51) capable of extracting and pressurizing paint, wherein the high-pressure pump (51) is connected to a pressure accumulator (52), the pressure accumulator (52) is connected to a filter (53), and the filter (53) is connected to a first nozzle (54).

4. A multi-dimensional coating mechanism according to claim 1, characterized in that: The pneumatic spraying device (6) comprises a second nozzle (61) and an air cover (62) connected to the second nozzle (61), wherein the air cover (62) is provided with a first air hole (63) located in the center of the air cover (62) and capable of promoting the initial atomization of the paint, a second air hole (64) capable of further breaking up the initially atomized paint droplets, and a third air hole (65) provided on the side wall of the air cover (62) and used for adjusting the width and shape of the atomization pattern.

5. A multi-dimensional coating mechanism according to claim 1, characterized in that: The y-axis moving mechanism (72) comprises a y-axis linear module (721), and the y-axis linear module (721) is provided with a first moving block (722) capable of driving a single coating unit (3) to move along the y-axis linear module (721).

6. A multi-dimensional coating mechanism according to claim 5, characterized in that: The x-axis moving mechanism (71) comprises an x-axis linear module (711) connected to a first moving block (722), and the x-axis linear module (711) is provided with a second moving block (712) capable of driving a single coating unit (3) to move along the x-axis linear module (711).

7. A multi-dimensional coating mechanism according to claim 6, characterized in that: The z-axis moving mechanism (73) comprises a z-axis linear module (731) connected to the second moving block (712), and the z-axis linear module (731) is provided with a third moving block (732) capable of driving a single coating unit (3) to move along the z-axis linear module (731).

8. A multi-dimensional coating mechanism according to claim 7, characterized in that: The swing mechanism (74) comprises a rotating motor (741) connected to the third moving block (732), the output shaft of the rotating motor (741) extends along the y-axis direction, and the output shaft of the rotating motor (741) is connected to a single coating unit (3).

9. The multi-dimensional coating mechanism according to claim 1, characterized in that: Each coating unit (3) is connected to a PLC controller capable of controlling the coating time, coating amount, and coating type of the single coating unit (3); the PLC controller is connected to an x-axis moving mechanism (71), a y-axis moving mechanism (72), a z-axis moving mechanism (73), and a swinging mechanism (74).

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