Three-proofing paint spraying device

Abstract

The invention discloses a conformal coating spraying device, and relates to the technical field of circuit board processing, the conformal coating spraying device comprises a workbench and a first guide rail, the workbench is horizontally arranged, and a horizontally arranged conveyor belt is arranged on the top surface of the workbench; the first guide rail is correspondingly arranged above the conveying belt and is parallel to the conveying belt, and a nozzle assembly is slidably connected to the first guide rail, slides in the length direction of the first guide rail and is used for spraying paint on the upper surface of the circuit board; horizontal second guide rails are further arranged on the top face of the workbench, located above the conveying belt, arranged at the two ends of the first guide rail in the length direction correspondingly and perpendicular to the first guide rail, and the two ends of the first guide rail are slidably connected to the two second guide rails correspondingly; a drying assembly is arranged at the position, corresponding to the conveying belt and close to the discharging end, of the workbench and used for drying conformal coating on the surface of the circuit board. The paint spraying device has the effect of high paint spraying efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board processing, and particularly to a three-proof paint spraying device. Background Art

[0002] With the development of industry, more and more fields have started to use automated devices for production and other work. Circuit boards are one of the core components of automated devices. Therefore, during the use of the devices, some protective measures need to be taken for the circuit boards to extend the service life of the circuit boards.

[0003] Three-proof paint is a special formula paint. After spraying the three-proof paint on the surface of the circuit board, a protective layer can be formed on the surface of the circuit board, effectively reducing the erosion of the environment on the circuit board, extending the service life of the circuit board, and thus improving the safety of the automated device when used in some harsh environments.

[0004] When spraying three-proof paint on the circuit board to be processed, the operator needs to hold the spraying device for spraying. However, the manual spraying method not only has low processing efficiency, but also the harmful components in the three-proof paint are easy to cause irreversible damage to the physical health of the operator. Summary of the Invention

[0005] In order to improve the situation that manual spraying of three-proof paint not only has low efficiency but also is harmful to the body, the present application provides a three-proof paint spraying device.

[0006] The present application provides a three-proof paint spraying device, adopting the following technical solutions: A three-proof paint spraying device includes A workbench, the workbench is placed horizontally, and a horizontally placed conveyor belt is arranged on the top surface of the workbench. One end of the conveyor belt is the feeding end, and the other end is the discharging end; the conveyor belt is used for conveying the circuit board; A first guide rail, the first guide rail is correspondingly arranged above the conveyor belt and is parallel to the conveyor belt. A nozzle assembly is slidably connected to the first guide rail, and the nozzle assembly slides along the length direction of the first guide rail. The nozzle assembly is used for spraying three-proof paint on the upper surface of the circuit board; A horizontal second guide rail is further arranged on the top surface of the workbench. The second guide rail is located above the conveyor belt, and the second guide rail is respectively arranged at both ends in the length direction of the first guide rail and is perpendicular to the first guide rail. Both ends of the first guide rail are slidably connected to the two second guide rails; The workbench is provided with a drying assembly at a position corresponding to the conveyor belt near the discharging end. The drying assembly is used for drying the three-proof paint on the surface of the circuit board.

[0007] By adopting the above technical solution, when spraying the surface of the circuit board, the circuit board can be placed on the conveyor belt from the feeding end, and then the spraying head assembly sprays the three-proof paint on the surface of the circuit board. The spraying head assembly can slide along the first guide rail, and at the same time, the first guide rail can also drive the spraying head assembly to slide along the second guide rail together to adjust the area where the spraying head assembly sprays paint on the circuit board, realizing automatic spraying on the surface of the circuit board, effectively reducing the workload of the operator for spraying operations, and at the same time reducing the damage to the operator's body caused by harmful substances in the three-proof paint. At the same time, a drying component is arranged at the discharging end of the conveyor belt, and the drying component can accelerate the drying of the three-proof paint sprayed on the surface of the circuit board, effectively improving the spraying effect.

[0008] Optionally, the spraying head assembly includes a mounting seat and a paint spraying valve. The mounting seat is slidably connected to the first guide rail, the paint spraying valve is vertically slidably connected to the mounting seat, and a third driving member for driving the paint spraying valve to move is arranged on the mounting seat.

[0009] By adopting the above technical solution, through the arranged third driving member, the distance between the paint spraying valve and the circuit board can be freely adjusted to adapt to circuit boards of different thicknesses.

[0010] Optionally, the conveyor belt includes a first conveyor belt and a second conveyor belt that are connected end to end. The feeding end is located at one end of the first conveyor belt, the discharging end is located at one end of the second conveyor belt, the drying component is correspondingly arranged at the position of the second conveyor belt, a rotatable roller is arranged between the first conveyor belt and the second conveyor belt, the rotation axis of the roller is perpendicular to the conveying direction of the first conveyor belt, a placement groove is formed in the roller along the conveying direction of the first conveyor belt, and the placement groove is used for receiving the circuit board that slides in from the first conveyor belt. An auxiliary driving component and a clamping component are further arranged in the placement groove of the roller. The auxiliary driving component is used for pushing the circuit board out of the roller, and the clamping component is used for fixing the position of the circuit board.

[0011] By adopting the above technical solution, the circuit board is first conveyed on the first conveyor belt and sprayed, and then the circuit board falls into the placement groove of the roller. The position of the circuit board is fixed by the clamping component. Then the roller rotates 180° clockwise or counterclockwise to turn the unsprayed side of the circuit board upwards. Then the clamping component releases the circuit board, and the circuit board is driven to move by the auxiliary driving component until the circuit board falls on the second conveyor belt, and the spraying head assembly continues to spray paint on the unsprayed side of the circuit board.

[0012] Optionally, one support frame is arranged at each of the two ends of the roller along its axis direction. The support frames are vertically fixed on the top surface of the workbench. The two ends of the roller are respectively vertically slidably connected to the two support frames, and a fifth driving member for driving the roller to slide is arranged on the workbench.

[0013] By adopting the above technical solution, the seventh driving member can drive the rotating drum to slide in the vertical direction. When the circuit board falls into the rotating drum from the first conveyor belt, the rotating drum flips 180°, and the circuit board follows the flip. The height of the circuit board in the vertical direction rises, and then the fifth driving member drives the rotating drum to descend until the placement groove of the rotating drum is flush with the second conveyor belt, thereby reducing the height difference of the circuit board when transferring from the rotating drum to the second conveyor belt, making the rotation process of the circuit board more stable and reliable.

[0014] Optionally, a hollow ventilation cavity is opened in the rotating drum, and the ventilation cavity is used to connect to an external air source. A side wall of the rotating drum located in the placement groove is opened with multiple air outlets, and the air outlets are connected to the ventilation cavity, and the air outlets are used to face the surface of the circuit board.

[0015] By adopting the above technical solution, after the hollow ventilation cavity is connected to an external air source, the external air source can be blown out from the air outlet and finally blown to the surface of the circuit board placed in the placement cavity, so that the circuit board can accelerate the curing of the three-proof paint in the rotating drum.

[0016] Optionally, the clamping assembly includes two clamps and an eighth driving member for driving the clamps to move. The two clamps correspond to each other and are placed horizontally. At the same time, they are respectively arranged close to the two side walls of the rotating drum located in the placement groove. The two clamps can approach or move away from each other for clamping or loosening the circuit board.

[0017] By adopting the above technical solution, the eighth driving member drives the two clamps to move closer to or away from each other, and the two clamps can clamp or release the circuit board, thereby locking or unlocking the position of the circuit board, so that the circuit board can be more stable when following the rotation of the drum.

[0018] Optionally, a side of the clamping plate away from the eighth driving member is slidably connected to a transfer plate, and the transfer plate slides along the length direction of the clamping plate. A ninth driving member for driving the transfer plate to move is provided at one end of the clamping plate.

[0019] By adopting the above technical solution, the transfer plate can slide relative to the clamping plate, and the transfer plate is in direct contact with the circuit board. When the circuit board needs to be transferred out of the rotating drum, the ninth driving member can drive the circuit board to move out of the rotating drum through the transfer plate, making the circuit board transfer process smoother.

[0020] Optionally, a side of the transfer plate away from the clamping plate is provided with an anti-slip texture.

[0021] By adopting the above technical solution, the anti-skid texture on the transfer plate contacts the side wall of the circuit board, which can increase the friction between the transfer plate and the circuit board and prevent the circuit board from sliding during the spraying process.

[0022] Optionally, the auxiliary drive assembly includes a plurality of rollers, which are rotatably connected to the two side walls of the rotating drum located in the placement groove, and the plurality of rollers are spaced apart along the length direction of the splint, and the rotation axes of the rollers are perpendicular to the length direction of the splint, and all the rollers are at the same horizontal height.

[0023] By adopting the above technical solution, all the rollers are at the same level, which can support the circuit board and make it slide out of the rotating drum smoothly.

[0024] In summary, the present application includes at least one of the following beneficial effects: 1. By using an automated spraying device to spray conformal coating on circuit boards, production efficiency is improved, and the labor intensity and health damage of operators are reduced; 2. By adopting the coordinated design of the nozzle assembly and the conveyor belt, the nozzle assembly can evenly spray the circuit board on the conveyor belt, ensuring the spraying effect; 3. By adopting the design of rotating drum and clamping assembly, the circuit board can be automatically turned over and fixed, which improves the flexibility and adaptability of spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram showing the overall structure of a spraying device in an embodiment of the present application; Figure 2 This is a schematic diagram showing the structure of a rotating drum in an embodiment of the present application; Figure 3 is a cross-sectional schematic diagram showing the internal structure of the drum in an embodiment of the present application; Figure 4 is a schematic diagram showing the embodiment of the present application after the rotating drum is turned over; Figure 5 is a schematic structural diagram showing a clamping assembly according to an embodiment of the present application; Figure 6 It is a schematic diagram showing the structure of a splint according to an embodiment of the present application.

[0026] Explanation of the accompanying drawings: 1. workbench; 11. fixed frame; 12. first conveyor belt; 13. second conveyor belt; 14. first guide rail; 141. second drive member; 15. second guide rail; 151. fourth drive member; 16. belt; 17. UV light box; 2. support; 3. mounting seat; 31. paint spray valve; 32. third drive member; 4. rotating drum; 41. placement groove; 42. roller; 43. seventh drive member; 44. ventilation chamber; 45. air outlet; 5. supporting frame; 51. moving block; 52. fifth drive member; 53. sixth drive member; 6. circuit board; 7. clamping assembly; 71. eighth drive member; 72. transfer plate; 73. ninth drive member; 74. splint. DETAILED DESCRIPTION

[0027] The following will further elaborate on this application in conjunction with the attached Figure 1-6 drawings.

[0028] An embodiment of this application discloses a three-proof paint spraying device. Referring to Figure 1 , the three-proof paint spraying device includes a horizontally placed workbench 1. A fixing frame 11 is fixed at the bottom of the workbench 1. The fixing frame 11 is formed by welding multiple mutually perpendicular fixing rods, and the fixing frame 11 can provide stable support for the workbench 1. On the top surface of the fixed table, a first conveyor belt 12 and a second conveyor belt 13 are also horizontally placed. The first conveyor belt 12 and the second conveyor belt 13 are disconnected and connected end to end to form a straight line. The end of the first conveyor belt 12 away from the second conveyor belt 13 is the feeding end, and the end of the second conveyor belt 13 away from the first conveyor belt 12 is the discharging end. The first conveyor belt 12 and the second conveyor belt 13 together form a conveying channel for the circuit board 6 to complete the processing and transfer of the circuit board 6. The first conveyor belt 12 and the second conveyor belt 13 are both suspended and fixed on the workbench 1 through support rods, and a first driving member is provided on one side of both the first conveyor belt 12 and the second conveyor belt 13. The first driving member can be a small servo motor, and the output shafts of the first driving member are coaxially fixed to the pulleys of the first conveyor belt 12 and the second conveyor belt 13 respectively, so that the first driving member can drive the first conveyor belt 12 and the second conveyor belt 13 to run. In other embodiments of this application, the conveyor belts can also be in the form of two parallel and spaced belts, and the circuit board 6 is placed between the two parallel conveyor belts for transfer to reduce the contact of the conveyor belts with the electrical components on the circuit board 6.

[0029] On the top surface of the workbench 1, a horizontally placed first guide rail 14 and a second guide rail 15 are also provided. Both the first guide rail 14 and the second guide rail 15 are located above the first conveyor belt 12. Among them, the first guide rail 14 is placed parallel to the first conveyor belt 12, and the second guide rails 15 are respectively arranged at the head and tail ends of the first guide rail 14, and both second guide rails 15 are perpendicular to the first guide rail 14. The bottoms of the second guide rails 15 are fixed to the top surface of the workbench 1 through supports 2. A belt 16 rotates in both the first guide rail 14 and the second guide rail 15. The belt 16 is respectively arranged along the length direction of the corresponding first guide rail 14 or second guide rail 15. Among them, both ends of the first guide rail 14 are fixed to the belts 16 of the two second guide rails 15 through a slider respectively, so that when the belt 16 of the second guide rail 15 rotates, the first guide rail 14 can slide along the length direction of the second guide rail 15.

[0030] Referring to Figure 1The mounting seat 3 is fixed on the belt 16 of the first guide rail 14, and the second driving member 141 is fixed on the first guide rail 14. The output shaft of the second driving member 141 is coaxially fixed with the pulley at one end of the first guide rail 14, so that when the belt 16 of the first guide rail 14 rotates, the mounting seat 3 can slide along the length direction of the first guide rail 14. The mounting seat 3 is placed vertically, and the side of the mounting seat 3 is slidably connected to two paint spraying valves 31 through a combination of a slider and a slide rail. The nozzle of the paint spraying valve 31 is vertically downward, and a third driving member 32 is fixed on the top of the mounting seat 3. The third driving member 32 can be an electric cylinder. The output shaft of the third driving member 32 is fixed to the slider of the paint spraying valve 31, so that the third driving member 32 can drive the paint spraying valve 31 to move in the vertical direction, and the distance between the paint spraying valve 31 and the circuit board 6 can be freely adjusted to adapt to circuit boards 6 of different thicknesses. Meanwhile, a fourth driving member 151 is fixed to one end of the second guide rail 15. Both the fourth driving member 151 and the second driving member 141 can be small stepping motors. The output shaft of the fourth driving member 151 is coaxially fixed to the pulley at one end of the second guide rail 15, so that the fourth driving member 151 can drive the belt 16 of the second guide rail 15 to operate. The paint spraying valve 31 can slide along the first guide rail 14, and the first guide rail 14 can also drive the paint spraying valve 31 to slide along the second guide rail 15, so as to adjust the area where the spray head assembly sprays paint on the circuit board 6, and realize automatic spraying on the surface of the circuit board 6.

[0031] The workbench 1 is fixed with a UV light box 17 at a position corresponding to the second conveyor belt 13 near the discharge end. The second conveyor belt 13 runs through the UV light box 17. An ultraviolet lamp is fixed in the UV light box 17. The circuit board 6 is transported to the UV light box 17 via the second conveyor belt 13. The ultraviolet lamp can accelerate the drying of the three-proof paint on the surface of the circuit board 6, effectively improving the spraying effect of the three-proof paint. The position of the UV light box 17 can be placed according to actual conditions to reduce the impact on the spraying of the circuit board 6.

[0032] Reference Figure 1 and Figure 2 A rotating drum 4 is arranged between the first conveyor belt 12 and the second conveyor belt 13. The rotating axis of the rotating drum 4 is horizontal and perpendicular to the conveying direction of the first conveyor belt 12. A vertical support frame 5 is arranged at both ends of the rotating drum 4 along its own axis. A vertical moving groove is opened in the middle area of the support frame 5. A moving block 51 is slidably connected in the moving groove. The two ends of the rotating drum 4 are respectively fixed on the moving block 51 through a connecting rod, so that the rotating drum 4 can slide vertically following the moving block 51. A fifth driving member 52 is fixed at the bottom of the supporting frame 5 located in the moving groove. The fifth driving member 52 can be an electric cylinder. The output shaft of the fifth driving member 52 is fixed to the bottom of the moving block 51. The fifth driving member 52 can drive the rotating drum 4 to rise and fall through the moving block 51. At the same time, a sixth driving member 53 is fixed on one side of the moving block 51. The sixth driving member 53 can be a small stepping motor. The output shaft of the sixth driving member 53 is coaxially fixed with the connecting rod, so that the sixth driving member 53 can drive the rotating drum 4 to rotate.

[0033] Reference Figure 2 and Figure 3 , the rotating drum 4 is provided with a placement groove 41 along the conveying direction of the first conveyor belt 12, and the circuit board 6 can slide from the first conveyor belt into the placement groove 41 for receiving. The rotating drum 4 is rotatably connected to the bottom of the placement groove 41 with a plurality of rollers 42, and the plurality of rollers 42 are rotatably connected to the two side walls of the rotating drum 4 located in the placement groove 41, and three rollers 42 are arranged at intervals on each side, and the three rollers 42 on each side are arranged at intervals along the length direction of the first conveyor belt 12, and the rotation axes of the rollers 42 are perpendicular to the length direction of the first conveyor belt 12, and all the rollers 42 are at the same horizontal height. When the circuit board 6 slides into the placement groove 41, the rollers 42 can receive the circuit board 6 and make it slide smoothly. A seventh driving member 43 is fixed at the position of the outer wall of the rotating drum 4 corresponding to the roller 42, and the seventh driving member 43 can be a small motor, and the output shafts of the seventh driving member 43 are coaxially fixed with each roller 42, so that the seventh driving member 43 can drive the roller 42 to rotate.

[0034] A hollow ventilation cavity 44 is provided inside the rotating drum 4, and the ventilation cavity 44 can be connected to an external air source through a connecting pipe. At the same time, a plurality of air outlets 45 are provided on an inner side wall of the rotating drum 4 located in the placement groove 41, and the air outlets 45 are connected to the ventilation cavity 44, and the air outlets 45 are all facing the surface of the circuit board 6. After the hollow ventilation cavity 44 is connected to an external air source, the external air source can be blown out from the air outlet 45, and finally blown to the surface of the circuit board 6 placed in the placement groove 41, so that the circuit board 6 accelerates the curing of the three-proof paint in the rotating drum 4.

[0035] Reference Figure 3 and Figure 4 The rotating drum 4 is located in the placement groove 41 and is also provided with a clamping assembly 7 capable of clamping the circuit board 6. After one side of the circuit board 6 is sprayed, it slides from the first conveyor belt 12 into the placement groove 41 of the rotating drum 4, and the circuit board 6 slides onto the roller 42. As the roller 42 rotates, the circuit board 6 is gradually completely transferred to the rotating drum 4. The clamping assembly 7 clamps the circuit board 6, and then the rotating drum 4 rotates 180° clockwise or counterclockwise to turn the unpainted side of the circuit board 6 upward. After the circuit board 6 follows the turning of the rotating drum 4, the height of the circuit board 6 in the vertical direction rises. At this time, the rotating drum 4 descends until the placement groove 41 of the rotating drum 4 is flush with the second conveyor belt 13 or the first conveyor belt 12, thereby reducing the height difference when the circuit board 6 is transferred from the rotating drum 4 to the second conveyor belt 13 or the first conveyor belt 12, making the transfer process of the circuit board 6 more stable and reliable. Then, the unpainted side of the circuit board 6 continues to be sprayed on the second conveyor belt 13 or the first conveyor belt 12. After the circuit board 6 is placed in the placement groove 41, the ventilation cavity 44 can be connected to the external wind source, and the wind blows from the air outlet 45 to the surface of the circuit board 6 that has just been sprayed, which can accelerate the curing of the three-proof paint while turning it over.

[0036] Reference Figure 5 and Figure 6 Figure 6 , the clamping assembly 7 includes clamping plates 74 on both sides of the circuit board 6 and an eighth driving member 71 for driving the movement of the clamping plates 74. The two clamping plates 74 correspond to each other and are both horizontally arranged, and are respectively disposed close to the two side walls of the rotating cylinder 4 located in the placement groove 41. The two clamping plates 74 can approach or move away from each other to clamp or loosen the circuit board 6. The eighth driving member 71 can be an electric cylinder, and the output shaft of the eighth driving member 71 is fixed to the clamping plate 74, which can drive the clamping plate 74 to clamp the circuit board 6 in the horizontal direction, so that the circuit board 6 is more stably fixed in the rotating cylinder 4 for flipping.

[0037] A transfer plate 72 is slidably connected to the side surface of the clamping plate 74 away from the eighth driving member 71. The transfer plate 72 slides along the length direction of the clamping plate 74. A ninth driving member 73 for driving the movement of the transfer plate 72 is fixed to one end of the clamping plate. The ninth driving member 73 can be an electric cylinder, and the output shaft of the ninth driving member 73 is fixed to the side surface of the transfer plate 72, so that the ninth driving member 73 can drive the transfer plate 72 to slide within the clamping plate 74. The transfer plate 72 is in direct contact with the circuit board 6. When it is necessary to transfer the circuit board 6 out of the rotating cylinder 4, the ninth driving member 73 can drive the circuit board 6 to move out of the rotating cylinder 4 through the transfer plate 72, making the transfer process of the circuit board 6 smoother. At the same time, anti-slip textures are provided on the side surface of the transfer plate 72 away from the clamping plate 74. The anti-slip textures on the transfer plate 72 are in contact with the side wall of the circuit board 6, which can increase the friction between the transfer plate 72 and the circuit board 6 and prevent the circuit board 6 from sliding during the spraying process.

[0038] The implementation principle of a three-proof paint spraying device according to an embodiment of the present application is as follows: The circuit board 6 is first conveyed on the first conveyor belt 12 and sprayed, and then the circuit board 6 falls into the placement groove 41 of the rotating cylinder 4. The position of the circuit board 6 is fixed by the clamping assembly 7. Subsequently, the rotating cylinder 4 rotates clockwise or counterclockwise to turn over the circuit board 6 and blow dry the three-proof paint on the surface of the circuit board 6. Subsequently, the clamping assembly 7 releases the circuit board 6, and the ninth driving member 73 drives the circuit board 6 to move through the transfer plate 72 until the circuit board 6 falls on the second conveyor belt 13 or falls back onto the first conveyor belt 12 again, and the spraying valve 31 continues to spray the unsprayed side of the circuit board 6.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A conformal coating spraying device, characterized in that: include A workbench (1), the workbench (1) being placed horizontally, a conveyor belt being placed horizontally disposed on the top surface of the workbench (1), one end of the conveyor belt being a feeding end and the other end being a discharging end; the conveyor belt being used to transport circuit boards (6); A first guide rail (14), the first guide rail (14) being arranged above the conveyor belt and parallel to the conveyor belt, a nozzle assembly being slidably connected to the first guide rail (14), the nozzle assembly sliding along the length direction of the first guide rail (14), the nozzle assembly being used to spray conformal coating on the upper surface of the circuit board (6); The top surface of the workbench (1) is also provided with a horizontal second guide rail (15), the second guide rail (15) is located above the conveyor belt, the second guide rails (15) are respectively provided at both ends of the length direction of the first guide rail (14), and are both perpendicular to the first guide rail (14), and the two ends of the first guide rail (14) are respectively slidably connected to the two second guide rails (15); The workbench (1) is provided with a drying component at a position corresponding to the conveyor belt close to the discharge end, and the drying component is used to dry the conformal coating on the surface of the circuit board (6).

2. A conformal coating spraying device according to claim 1, characterized in that: The spray head assembly comprises a mounting seat (3) and a paint spray valve (31); the mounting seat (3) is slidably connected to a first guide rail (14); the paint spray valve (31) is vertically slidably connected to the mounting seat (3); and a third driving member (32) is provided on the mounting seat (3) for driving the paint spray valve (31) to move.

3. A conformal coating spraying device according to claim 1, characterized in that: The conveyor belt comprises a first conveyor belt (12) and a second conveyor belt (13) connected end to end, the feed end is located at one end of the first conveyor belt (12), the discharge end is located at one end of the second conveyor belt (13), the drying component is arranged at a position corresponding to the second conveyor belt (13), a rotatable drum (4) is arranged between the first conveyor belt (12) and the second conveyor belt (13), the rotation axis of the drum (4) is perpendicular to the conveying direction of the first conveyor belt (12), the drum (4) is provided with a placement groove (41) along the conveying direction of the first conveyor belt (12), the placement groove (41) is used to receive the circuit board (6) sliding in from the first conveyor belt (12), the drum (4) is located in the placement groove (41) and is also provided with an auxiliary drive component and a clamping component (7), the auxiliary drive component is used to push the circuit board (6) out of the drum (4), and the clamping component (7) is used to fix the position of the circuit board (6).

4. A conformal coating spraying device according to claim 3, characterized in that: A support frame (5) is respectively provided at both ends of the rotating drum (4) along its own axial direction; the support frame (5) is vertically fixed on the top surface of the workbench (1); both ends of the rotating drum (4) are respectively vertically slidably connected to the two support frames (5); and a fifth driving member (52) for driving the rotating drum (4) to slide is provided on the workbench (1).

5. A conformal coating spraying device according to claim 4, characterized in that: A hollow ventilation cavity (44) is provided in the rotating drum (4), and the ventilation cavity (44) is used to connect to an external air source. A side wall of the rotating drum (4) located in the placement groove (41) is provided with a plurality of air outlets (45), and the air outlets (45) are connected to the ventilation cavity (44). The air outlets (45) are used to face the surface of the circuit board (6).

6. The conformal coating spraying device according to claim 3, characterized in that: The clamping assembly (7) includes two clamping plates (74) and an eighth driving member (71) for driving the movement of the clamping plates (74). The two clamping plates (74) correspond to each other and are both horizontally arranged, and are respectively disposed close to the two side walls of the rotary drum (4) located in the placement groove (41). The two clamping plates (74) can approach each other or move away from each other to clamp or release the circuit board (6).

7. A conformal coating spraying device according to claim 6, characterized in that: A transfer plate (72) is slidably connected to a side surface of the clamping plate (74) away from the eighth driving member (71). The transfer plate (72) slides along the length direction of the clamping plate (74), and a ninth driving member (73) for driving the movement of the transfer plate (72) is arranged at one end of the clamping plate (74).

8. A conformal coating spraying device according to claim 7, characterized in that: An anti-slip texture is provided on a side surface of the transfer plate (72) away from the clamping plate (74).

9. The conformal coating spraying device according to claim 3, characterized in that: The auxiliary driving assembly includes a plurality of rollers (42). The plurality of rollers (42) are respectively rotatably connected to the two side walls of the rotary drum (4) located in the placement groove (41). The plurality of rollers (42) are arranged at intervals along the length direction of the clamping plate (74). The rotation axes of the rollers (42) are all perpendicular to the length direction of the clamping plate (74), and all the rollers (42) are at the same horizontal height.

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