Automatic drying device for manufacturing printed circuit board assembly
By combining a vision sensor with a clamping and flipping mechanism, the problem of incomplete drying of the lower surface of printed circuit boards was solved, realizing automated all-round drying of printed circuit boards and improving production efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-03-27
AI Technical Summary
Existing drying equipment cannot thoroughly dry the lower surface of printed circuit boards, resulting in incomplete drying, which affects insulation performance and structural stability, and increases labor rework costs and production cycle.
The system employs components such as vision sensors, rotating shafts, clamping blocks, and cylinders to achieve automated clamping and flipping of printed circuit boards. Combined with the design of ventilation holes and hot air blowers, it ensures that hot air fully contacts the upper and lower surfaces, and achieves automated collaborative operation through a controller.
It achieves thorough drying of the upper and lower surfaces of printed circuit boards, reduces manual intervention and operational errors, improves production efficiency and the degree of automation of the equipment, and extends service life.
Smart Images
Figure CN121739718A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of printed circuit board assembly manufacturing technology, specifically to an automatic drying device for printed circuit board assembly manufacturing. Background Technology
[0002] PCB (Printed Circuit Board) is a core component of electronic devices, responsible for supporting and electrically connecting electronic components. Its manufacturing quality directly affects the stability and lifespan of electronic devices. In the PCB manufacturing process, the cleaned bare boards need to be dried to remove residual cleaning fluid, moisture, and impurities from the surface, preventing problems such as cold solder joints and short circuits in subsequent soldering and assembly processes.
[0003] Existing drying equipment mostly uses conveyor belts to transport bare boards for drying. However, because the lower surface of the bare board is directly attached to the conveyor belt surface, the drying airflow has difficulty contacting the lower surface of the board, resulting in only the upper surface being dried. This often leads to residual moisture on the lower surface of the board and incomplete drying. This localized undried condition not only affects the insulation performance and structural stability of the printed circuit board, but also requires secondary drying by workers, increasing labor costs and production cycle. It is time-consuming and labor-intensive, significantly reducing the drying efficiency of the drying equipment for bare printed circuit boards. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides an automatic drying device for manufacturing printed circuit board assemblies, which solves the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic drying device for manufacturing printed circuit board assemblies, comprising a support leg, a base plate fixedly connected to the inner side of the support leg, an air pump fixedly connected to the left side of the upper surface of the base plate, an outer frame fixedly connected to the top of the support leg, transmission rollers inserted into the left and right sides of the outer frame, a conveyor belt sleeved on the outer surface of the transmission rollers, a fixing plate fixedly connected to the left side of the front of the outer frame, a reduction motor fixedly connected to the left side of the fixing plate, the output end of the reduction motor fixedly connected to the front end of the left transmission roller, a drying chamber fixedly connected to the upper surface of the outer frame, and a drying chamber with air pumps fixedly connected to the left and right sides of the upper surface of the drying chamber. A hot air blower is provided. A first vision sensor is fixedly connected to the inner wall of the rear side of the drying chamber. A rotating shaft is inserted through the bottom of the outer side of the drying chamber. A connecting plate is fixedly connected to the bottom of the front side of the drying chamber. A drive motor is fixedly connected to the lower surface of the connecting plate. The output end of the drive motor is fixedly connected to the front end of the rotating shaft. Limiting rings are fixedly sleeved on both the front and rear sides of the outer surface of the rotating shaft. A first T-shaped slide rail is fixedly connected to the left side of the outer surface of the rotating shaft. A clamping block is slidably sleeved on the outer side of the first T-shaped slide rail. A rubber block is fixedly connected to the inner side of the clamping block. A first cylinder is fixedly connected to the inner side of the clamping block. A controller is fixedly connected to the right side of the front side of the outer frame.
[0006] Preferably, a material feeding basket is fixedly connected to the left side of the outer frame, a material collection basket is fixedly connected to the right side of the outer frame, a triangular support block is fixedly connected to the top of the back of the left rear support leg, a connecting frame is fixedly connected to the upper surface of the triangular support block, a second T-shaped slide rail is fixedly connected to the inner wall of the connecting frame, a support rod is slidably sleeved on the left side of the outer side of the second T-shaped slide rail, a mounting plate is fixedly connected to the front end of the support rod, a limit rod is movably inserted into the outer side of the mounting plate, a second cylinder is fixedly connected to the middle of the upper surface of the mounting plate, a moving plate is fixedly connected to the bottom end of the limit rod, the bottom end of the second cylinder is fixedly connected to the middle of the upper surface of the moving plate, a second vision sensor is fixedly connected to the left side of the lower surface of the moving plate, a suction cup is fixedly connected to the outer side of the lower surface of the moving plate, a fixing block is fixedly connected to the left side of the back of the outer frame, a third cylinder is fixedly inserted into the outer side of the fixing block, and the output end of the third cylinder is fixedly connected to the right side of the support rod.
[0007] Preferably, a triangular plate is fixedly connected to the outer side of the lower surface of the base plate, and the outer side of the triangular plate is fixedly connected to the inner side of the support leg.
[0008] Preferably, a reinforcing rod is fixedly connected to the outer side of the triangular support block, and the top end of the reinforcing rod is fixedly connected to the lower surface of the connecting frame.
[0009] Preferably, the inner wall of the drying chamber is fixed with a heat insulation layer, the heat insulation layer is made of ceramic fiber, and the thickness of the heat insulation layer is 10-15mm.
[0010] Preferably, the outer surface of the conveyor belt is provided with ventilation holes, the diameter of which is 2-5 mm and the ventilation holes are evenly distributed.
[0011] Preferably, the inner surface of the rubber block is provided with anti-slip texture, the anti-slip texture is serrated, and the thickness of the rubber block is 5-8mm.
[0012] Preferably, the air outlet of the hot air blower is fixedly connected to an air guide shroud, which is funnel-shaped and has its air outlet facing the center of the drying chamber.
[0013] Compared with the prior art, the present invention provides an automatic drying device for manufacturing printed circuit board assemblies, which has the following advantages: 1. This automatic drying device for manufacturing printed circuit board assemblies, by setting a first vision sensor, a rotating shaft, a drive motor, a first T-shaped slide rail, a clamping block, and a first cylinder, can clamp and fix the printed circuit board entering the drying chamber. During the drying process, the drive motor drives the rotating shaft to rotate, causing the printed circuit board to flip. With the help of the ventilation holes on the conveyor belt and the air guide shroud of the hot air blower, it is ensured that the hot air can fully contact the upper and lower surfaces of the printed circuit board, which completely solves the problem of incomplete drying and improves the drying quality.
[0014] 2. This automatic drying device for printed circuit board assembly manufacturing, by setting a second vision sensor, a suction cup, a second cylinder, a third cylinder, and a second T-shaped slide rail, can realize the automatic loading and unloading of printed circuit boards without manual intervention, reducing labor intensity, avoiding human operation errors, ensuring accurate placement of printed circuit boards, and improving production efficiency.
[0015] 3. This automatic drying device for printed circuit board assembly manufacturing centrally controls each component through a controller, realizing automated and coordinated operation of processes such as loading and unloading, conveying, flipping, and drying. It has a high degree of overall automation, and the parameters of each component can be flexibly adjusted. It is suitable for printed circuit boards of different specifications and drying requirements, and has strong versatility.
[0016] 4. This automatic drying device for printed circuit board assembly manufacturing improves the overall structural stability of the device by setting up reinforcement structures such as triangular plates and reinforcing rods, ensuring that each component operates smoothly during operation, reducing the failure rate, and extending the service life of the device. Attached Figure Description
[0017] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear side of the overall structure of the present invention; Figure 3 This is a partial cross-sectional view of the structure of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5This is a partial structural decomposition diagram of the present invention.
[0018] In the diagram: 1. Support leg; 2. Base plate; 3. Air pump; 4. Outer frame; 5. Transmission roller; 6. Conveyor belt; 7. Fixing plate; 8. Gear motor; 9. Drying chamber; 10. Hot air blower; 11. First vision sensor; 12. Rotating shaft; 13. Connecting plate; 14. Drive motor; 15. Limiting ring; 16. First T-shaped slide rail; 17. Clamping block; 18. Rubber block; 19. First cylinder; 20. Feeding basket; 21. Collection basket; 22. Triangular support block; 23. Connecting frame; 24. Second T-shaped slide rail; 25. Support rod; 26. Mounting plate; 27. Limiting rod; 28. Second cylinder; 29. Moving plate; 30. Second vision sensor; 31. Suction cup; 32. Fixing block; 33. Third cylinder; 34. Controller. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figures 1-5 This invention provides a technical solution: an automatic drying device for manufacturing printed circuit board assemblies, comprising a support leg 1, a base plate 2 fixedly connected to the inner side of the support leg 1, an air pump 3 fixedly connected to the left side of the upper surface of the base plate 2, an outer frame 4 fixedly connected to the top of the support leg 1, transmission rollers 5 inserted into both the left and right sides of the outer side of the outer frame 4, a conveyor belt 6 sleeved on the outer surface of the transmission rollers 5, a fixing plate 7 fixedly connected to the left side of the front of the outer frame 4, a reduction motor 8 fixedly connected to the left side of the fixing plate 7, the output end of the reduction motor 8 fixedly connected to the front end of the left transmission roller 5, a drying chamber 9 fixedly connected to the upper surface of the outer frame 4, and hot air blowers 10 arranged on both the left and right sides of the drying chamber 9. A first vision sensor 11 is fixedly connected to the inner wall of the rear side. A rotating shaft 12 is inserted through the bottom of the outer side of the drying chamber 9. A connecting plate 13 is fixedly connected to the bottom of the front side of the drying chamber 9. A drive motor 14 is fixedly connected to the lower surface of the connecting plate 13. The output end of the drive motor 14 is fixedly connected to the front end of the rotating shaft 12. Limiting rings 15 are fixedly sleeved on both the front and rear sides of the outer surface of the rotating shaft 12. A first T-shaped slide rail 16 is fixedly connected to the left side of the outer surface of the rotating shaft 12. A clamping block 17 is slidably sleeved on the outer side of the first T-shaped slide rail 16. A rubber block 18 is fixedly connected to the inner side of the clamping block 17. A first cylinder 19 is fixedly connected to the inner side of the clamping block 17. A controller 34 is fixedly connected to the right side of the front side of the outer frame 4.
[0021] In this invention, in order to achieve automated feeding, a second vision sensor 30, a suction cup 31, a second cylinder 28, and a third cylinder 33 are provided. After the second vision sensor 30 identifies the position of the printed circuit board in the feeding basket 20, the controller 34 controls the third cylinder 33 to push the support rod 25 to move along the second T-shaped slide rail 24, so that the suction cup 31 is aligned with the printed circuit board. Then, the second cylinder 28 pushes the moving plate 29 down, the suction cup 31 adsorbs the printed circuit board, and then the second cylinder 28 resets and the third cylinder 33 pushes to place the printed circuit board on the conveyor belt 6.
[0022] In this invention, in order to improve the structural stability of the device, a triangular plate is provided on the lower surface of the base plate 2. The triangular plate is fixedly connected to the support leg 1. The stability of the triangular structure enhances the device's vibration resistance during operation.
[0023] In this invention, in order to improve the structural stability of the device, a reinforcing rod is provided on the outside of the triangular support block 22. The reinforcing rod is fixed to the connecting frame 23. The stability of the triangular structure enhances the device's vibration resistance during operation.
[0024] In this invention, in order to reduce heat exchange between the inside and outside of the drying chamber and stabilize the internal temperature, the inner wall of the drying chamber 9 is fixed with a ceramic fiber insulation layer with a thickness of 10-15mm to ensure the PCB drying quality and reduce energy consumption.
[0025] In this invention, in order to ensure that the hot air fully contacts the lower surface of the PCB and avoids drying dead corners, the outer surface of the conveyor belt 6 is provided with evenly distributed ventilation holes with a diameter of 2-5mm, which, together with the flipping mechanism, achieves all-round drying.
[0026] In this invention, in order to avoid scratching the PCB surface and increase the clamping friction during clamping, a rubber block 18 with a thickness of 5-8mm and a serrated anti-slip texture is fixed to the inner side of the clamping block 17 to ensure the appearance of the PCB and the stability of clamping.
[0027] In this invention, in order to make the hot air evenly cover the PCB and improve the drying uniformity, a horn-shaped air guide shroud is fixed to the air outlet of the hot air blower 10, so that the hot air diffuses towards the center of the drying chamber 9 and avoids local overheating.
[0028] When using: Equipment initialization preparation: Check the connection status of each component of the device to ensure that the support leg 1, base plate 2, outer frame 4 and other structures are not loose and that the triangular plate and the reinforcing rod are firmly connected. Confirm that the electrical components such as air pump 3, geared motor 8, hot air blower 10, and drive motor 14 are properly connected to the controller 34 and the 220V mains power, and that there is no damage to the wiring. Turn on the power of controller 34 and enter the operation interface. Set the drying parameters according to the size and material of the printed circuit board to be dried: hot air blower 10 outlet temperature, geared motor 8 output speed, drive motor 14 rotation angle 180° and rotation interval time. Check the positions of the discharge basket 20 and the collection basket 21 to ensure that the discharge basket 20 is located on the left side of the outer frame 4 and aligned with the left end of the conveyor belt 6, and that the collection basket 21 is located on the right side of the outer frame 4 and smoothly connected to the right end of the conveyor belt 6.
[0029] Placement of workpieces to be dried: The cleaned bare printed circuit boards are neatly placed into the material basket 20 for easy identification by the second vision sensor 30.
[0030] Automated feeding process: Press the "Start" button on the controller 34, and the device enters the automatic operation mode. The second vision sensor 30 is activated to scan the printed circuit board in the material basket 20, identify the position coordinates of the bare board, and transmit the signal to the controller 34. After receiving the signal, the controller 34 controls the air pump 3 to start, providing air to the third cylinder 33. The piston rod of the third cylinder 33 extends and pushes the support rod 25 to slide along the second T-shaped slide rail 24 towards the material basket 20 until the suction cup 31 under the moving plate 29 is aligned with the four corners of the identified printed circuit board. The controller 34 controls the piston rod of the second cylinder 28 to extend, pushing the moving plate 29 to drive the limit rod 27 to move downward along the inside of the mounting plate 26, and the suction cup 31 moves down and adheres to the upper surface of the printed circuit board. The air pump 3 provides negative pressure to the suction cup 31 through the pipe. The suction cup 31 adsorbs and fixes the printed circuit board. The controller 34 controls the piston rod of the second cylinder 28 to retract, driving the moving plate 29 and the adsorbed bare board to reset upward. The piston rod of the third cylinder 33 continues to extend, pushing the support rod 25 to slide along the second T-shaped slide rail 24 toward the conveyor belt 6 until the printed circuit board moves to the center position on the left side above the conveyor belt 6. When the air pump 3 stops providing negative pressure to the suction cup 31, the suction cup 31 releases the printed circuit board, and the bare board is placed stably on the conveyor belt 6; the second cylinder 28 resets, and the third cylinder 33 drives the support rod 25 back to the initial position, ready for the next loading, thus completing a single loading process.
[0031] Workpiece conveying and drying: The controller 34 controls the geared motor 8 to start, and the output end of the geared motor 8 drives the left transmission roller 5 to rotate. The transmission roller 5 drives the right transmission roller 5 to rotate synchronously through the conveyor belt 6. The conveyor belt 6 transports the printed circuit board to the drying chamber 9 at a set speed. At the same time, the controller 34 controls the hot air blower 10 to start. The hot air blown out by the hot air blower 10 is diffused through the horn-shaped air guide and blown evenly into the drying chamber 9 to dry the bare board that has moved into the drying chamber 9. The printed circuit board moves with the conveyor belt 6. When it enters the designated position in the drying chamber 9, the first vision sensor 11 on the inner wall of the rear side of the drying chamber 9 detects the bare board and immediately transmits the signal to the controller 34. The controller 34 controls the geared motor 8 to pause, the conveyor belt 6 to stop conveying, and the printed circuit board to stay in the center position inside the drying chamber 9; at the same time, it controls the piston rod of the first cylinder 19 to retract, driving the two sets of clamping blocks 17 on the first T-shaped slide rail 16 to slide inward until the rubber block 18 fits against the left and right edges of the printed circuit board. After confirming that the clamping block 17 is firmly clamping the bare board, the controller 34 controls the drive motor 14 to start. The output end of the drive motor 14 drives the rotating shaft 12 to rotate. The rotating shaft 12 drives the clamping block 17 and the printed circuit board to rotate synchronously through the first T-shaped slide rail 16. The rotation angle is 180°, so that the original lower surface faces upward. Then the controller 34 controls the piston rod of the first cylinder 19 to retract, the clamping block 17 slides outward to reset, and releases the printed circuit board. The controller 34 controls the reduction motor 8 to restart, and the conveyor belt 6 continues to transport the printed circuit board to the right. During this process, hot air can also act on the upper and lower surfaces of the printed circuit board at the same time through the air vents on the surface of the conveyor belt 6. The heat insulation layer on the inner wall of the drying chamber 9 reduces heat loss and maintains the temperature inside the chamber to be stable until the drying of the bare board is completed. When the printed circuit board moves to the right end of the outer frame 4 along with the conveyor belt 6, the bare board slides out of the conveyor belt 6 under the conveying force of the conveyor belt 6 and falls into the collection basket 21 on the right, completing a single unloading process. If there are still printed circuit boards to be dried in the feeding basket 20, the device repeats the above feeding, conveying, drying and unloading process until all the bare boards in the feeding basket 20 are dried.
[0032] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.
[0033] The dimensions and shapes of all components in this structure are not specifically limited here and need to be produced according to the actual situation.
[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An automatic drying device for manufacturing printed circuit board assemblies, comprising a support leg (1), characterized in that: A base plate (2) is fixed to the inner side of the support leg (1). An air pump (3) is fixed to the left side of the upper surface of the base plate (2). An outer frame (4) is fixed to the top of the support leg (1). A transmission roller (5) is inserted into both the left and right sides of the outer side of the outer frame (4). A conveyor belt (6) is sleeved on the outer surface of the transmission roller (5). A fixing plate (7) is fixed to the left side of the front of the outer frame (4). A reduction motor (8) is fixed to the left side of the fixing plate (7). The output end of the reduction motor (8) is fixed to the front end of the left transmission roller (5). A drying chamber (9) is fixed to the upper surface of the outer frame (4). Hot air blowers (10) are provided on both the left and right sides of the drying chamber (9). A first vision sensor (11) is fixed to the inner wall of the rear side of the drying chamber (9). A rotating shaft (12) is inserted through the bottom of the outer side of the drying chamber (9). A connecting plate (13) is fixed to the bottom of the front side of the drying chamber (9). A drive motor (14) is fixed to the lower surface of the connecting plate (13). The output end of the drive motor (14) is fixed to the front end of the rotating shaft (12). Limiting rings (15) are fixedly sleeved on both the front and rear sides of the outer surface of the rotating shaft (12). A first T-shaped slide rail (16) is fixed to the left side of the outer surface of the rotating shaft (12). A clamping block (17) is slidably sleeved on the outer side of the first T-shaped slide rail (16). A rubber block (18) is fixed to the inner side of the clamping block (17). A first cylinder (19) is fixed to the inner side of the clamping block (17). A controller (34) is fixed to the right side of the front side of the outer frame (4).
2. The automatic drying device for manufacturing printed circuit board assemblies according to claim 1, characterized in that: A material feeding basket (20) is fixed to the left side of the outer frame (4), and a material collection basket (21) is fixed to the right side of the outer frame (4). A triangular support block (22) is fixed to the top of the back of the left rear support leg (1). A connecting frame (23) is fixed to the upper surface of the triangular support block (22). A second T-shaped slide rail (24) is fixed to the inner wall of the connecting frame (23). A support rod (25) is slidably sleeved on the left side of the outer side of the second T-shaped slide rail (24). A mounting plate (26) is fixed to the front end of the support rod (25). A limit rod (27) is movably inserted into the outer side of the mounting plate (26). A second cylinder (28) is fixedly connected to the middle of the upper surface of the mounting plate (26). A moving plate (29) is fixedly connected to the bottom end of the limiting rod (27). The bottom end of the second cylinder (28) is fixedly connected to the middle of the upper surface of the moving plate (29). A second vision sensor (30) is fixedly connected to the left side of the lower surface of the moving plate (29). A suction cup (31) is fixedly connected to the outer side of the lower surface of the moving plate (29). A fixing block (32) is fixedly connected to the left side of the back of the outer frame (4). A third cylinder (33) is fixedly inserted into the outer side of the fixing block (32). The output end of the third cylinder (33) is fixedly connected to the right side of the support rod (25).
3. The automatic drying device for manufacturing printed circuit board assemblies according to claim 1, characterized in that: A triangular plate is fixed to the outer side of the lower surface of the base plate (2), and the outer side of the triangular plate is fixed to the inner side of the support leg (1).
4. The automatic drying device for manufacturing printed circuit board assemblies according to claim 2, characterized in that: A reinforcing rod is fixed to the outer side of the triangular support block (22), and the top of the reinforcing rod is fixed to the lower surface of the connecting frame (23).
5. An automatic drying apparatus for manufacturing printed circuit board assemblies according to claim 1, characterized in that: The inner wall of the drying chamber (9) is fixed with a heat insulation layer, which is made of ceramic fiber and has a thickness of 10-15mm.
6. The automatic drying apparatus for manufacturing printed circuit board assemblies according to claim 1, characterized in that: The outer surface of the conveyor belt (6) is provided with ventilation holes, the diameter of which is 2-5 mm and the ventilation holes are evenly distributed.
7. An automatic drying apparatus for manufacturing printed circuit board assemblies according to claim 1, characterized in that: The inner side of the rubber block (18) is provided with anti-slip texture, the anti-slip texture is serrated, and the thickness of the rubber block (18) is 5-8mm.
8. An automatic drying apparatus for manufacturing printed circuit board assemblies according to claim 1, characterized in that: The air outlet of the hot air blower (10) is fixedly connected to an air guide hood, which is horn-shaped and the air outlet of the air guide hood faces the center of the drying chamber (9).