A PCB board copper plating cleaning machine

Abstract

This invention relates to the field of cleaning machine technology, specifically a PCB board post-copper plating cleaning machine. It includes an acid pickling machine, a water rinsing machine on the left side of the acid pickling machine, a cold air dryer on the left side of the water rinsing machine, a hot air dryer on the left side of the cold air dryer, and a flipping box on the left side of the hot air dryer. The acid pickling machine, water rinsing machine, cold air dryer, and hot air dryer all share a common conveying mechanism for transporting the PCB board. The PCB board is transported and cleaned from right to left. This invention utilizes a drive component, a reciprocating component, and a rotating component to simultaneously drive the rotating nozzle in a linear reciprocating motion, achieving both reciprocating linear spraying and rotating spraying. This increases the rinsing coverage area and provides dynamic rinsing, reducing blind spots compared to fixed nozzle rinsing. The complex water flow pattern generated by the rotating and reciprocating motion increases the shearing force on the stains, helping to peel off and remove contaminants, resulting in excellent cleaning performance.

Description

Technical Field

[0001] This invention belongs to the field of cleaning machine technology, specifically relating to a cleaning machine for PCB boards after copper plating. Background Technology

[0002] Printed circuit boards (PCBs) are indispensable basic components in modern electronic devices. They support and connect various electronic components, and achieve electrical connections between these components through conductive paths. The production process of PCBs involves multiple steps, with copper plating being an essential part. After copper plating, chemical plating solutions, reducing agents, and other chemical agents remain on the surface of the PCB and inside the hole walls, necessitating cleaning with a cleaning machine. However, existing cleaning machines have the following problems when cleaning PCBs:

[0003] 1. The existing PCB cleaning process includes acid pickling and high-pressure rinsing with deionized water. During acid pickling, since it is a preliminary cleaning, the pressure during spraying is relatively low, and top pressing is not required; only bottom support and conveying are needed. However, deionized water rinsing requires thorough cleaning. During deionized water rinsing, fixed nozzles are usually used to rinse the PCB at a fixed angle. Since the copper plating layer has a thickness after copper plating, it is easy for residues to remain on the hole walls and surface protrusions. Therefore, fixed-angle spray rinsing is difficult to thoroughly clean residual impurities and chemicals, resulting in poor cleaning efficiency and effect.

[0004] 2. Existing PCB boards are usually dried with hot air after cleaning. After drying, they need to be flipped over using a flipping mechanism. However, during the flipping process, dust can easily re-adhere to the PCB board, affecting cleaning efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a PCB board cleaning machine with a simple structure and reasonable design to solve the above problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] A PCB board copper plating cleaning machine includes an acid pickling machine, a water rinsing machine on the left side of the acid pickling machine, a cold air dryer on the left side of the water rinsing machine, a hot air dryer on the left side of the cold air dryer, and a flipping box on the left side of the hot air dryer. The acid pickling machine, water rinsing machine, cold air dryer, and hot air dryer are all equipped with a conveying mechanism for conveying the PCB board. The acid pickling machine is equipped with several acid pickling spray rollers symmetrically arranged vertically inside. The water rinsing machine is equipped with an adaptive pressing wheel and a reciprocating rotary cleaning mechanism.

[0008] The pickling machine, water rinsing machine, cold air dryer, and hot air dryer are all equipped with two mounting plates. The conveying mechanism includes a U-shaped plate fixedly installed on the right side of the pickling machine. Several conveying shafts rotatably pass through both the U-shaped plate and the mounting plate. Several conveying wheels for supporting and conveying PCB boards are fixedly fitted on each conveying shaft. A drive shaft is rotatably installed on both the U-shaped plate and the mounting plate.

[0009] The reciprocating rotary cleaning mechanism includes several No. 2 support plates fixedly connected to two mounting plates. A rotating component is arranged between two No. 2 support plates that are symmetrical front and rear. A reciprocating component is arranged behind the rotating component. A drive component is arranged between the two reciprocating components.

[0010] Preferably, the cold air dryer and the hot air dryer are both fixedly connected to a support plate at their rear sides, and a suction fan is installed on the top of the support plate. A filter cartridge is installed on the top of the air inlet of the suction fan, and the air outlet of the suction fan is connected to the cold air dryer, the hot air dryer and the turning mechanism through pipes respectively. The pickling machine, the water rinsing machine and the hot air dryer are all fixedly installed with columns at their rear sides, and a wire harness box is fixedly installed on the top of the columns. An electrical control cabinet is installed on the top of the water rinsing machine.

[0011] Preferably, the flipping mechanism includes a No. 1 servo motor fixedly installed on the rear side of the flipping box. The output end of the No. 1 servo motor rotates through the rear side wall of the flipping box and is fixedly connected to a central rotating shaft. The central rotating shaft is rotatably installed inside the flipping box. A rotating cylinder is fixedly sleeved on the outside of the central rotating shaft. Roller conveyors are provided on the top of both the left and right sides of the flipping box. Several guide rollers are rotatably installed on the top left and right sides inside the flipping box.

[0012] Preferably, the inner wall of the rotating cylinder is equipped with several No. 3 fixing rods, which are jointly fixedly installed on the central rotating shaft. A rotating disk is rotatably connected to the rear side of the rotating cylinder, and several connecting pipes are fixedly connected to the rotating disk. The rear side of the multiple connecting pipes passes through the rear side of the flipping box and is connected to an annular pipe. An air supply pipe is fixedly connected to the right side of the annular pipe and is connected to the air outlet of the suction fan. Several flipping rods are evenly fixedly installed on the outside of the rotating cylinder, and an air blowing port is opened between two adjacent flipping rods on the outside of the rotating cylinder.

[0013] Preferably, a second worm gear is fixedly sleeved at the rear end of each of the multiple conveying shafts. A gear transmission assembly is provided at the rear of the pickling machine. A second servo motor is provided at the top of the gear transmission assembly. The gear transmission assembly includes a gearbox fixedly connected to the rear of the pickling machine. The output end of the second servo motor is fixedly connected to the input end of the gearbox. A fixed shaft is fixedly connected to the output shaft of the gearbox. After the fixed shaft rotates through the rear of the pickling machine, a driving bevel gear is fixedly sleeved on it. Several second worms that mesh with the second worm gear are uniformly fixedly sleeved on the outside of the transmission shaft. A driven bevel gear that meshes with the driving bevel gear is fixedly sleeved on the middle of the transmission shaft.

[0014] Preferably, several No. 1 support plates are fixedly installed on the top and bottom of the two mounting plates located inside the pickling machine. A No. 1 fixing rod is provided on each of the two No. 1 support plates that are symmetrical front and rear. A pickling spray roller is fixedly installed between the two No. 1 fixing rods. Several fixed nozzles are evenly installed at the bottom of the pickling spray roller. A No. 1 arc-shaped locking seat for limiting and fixing the No. 1 fixing rod is fixedly installed on the No. 1 support plate. The No. 1 arc-shaped locking seat and the No. 1 fixing rod are connected by ball bearings.

[0015] Preferably, the drive assembly includes two bearing plates mounted on the rear mounting plate, with a transmission rod rotatably passing between the two bearing plates. A first worm gear is fixedly sleeved in the middle of the transmission rod. Several first worms meshing with the first worm gear are fixedly sleeved on the transmission shaft located inside the clean water rinsing machine. Cams are fixedly sleeved at the top and bottom of the transmission rod. The rotating assembly includes a second fixed rod slidably connected to a second support plate. A guide rod is fixedly installed on the outside of the second fixed rod and slidably connected inside the second support plate. A rinsing roller is fixedly installed between the two second fixed rods. Several diversion pipes are fixedly connected to the bottom of the rinsing roller. A rotating pipe is rotatably installed at the bottom of the diversion pipe. A rotating nozzle is fixedly installed at the bottom of the rotating pipe. A toothed ring is fixedly sleeved on the outside of the rotating pipe. A rack meshing with the toothed ring is fixedly connected between the two mounting plates.

[0016] Preferably, the reciprocating assembly includes several limiting sleeves mounted on a second support plate located at the rear. A second spring is fixedly sleeved inside the limiting sleeve. A fixing plate is fixedly mounted on the ends of the multiple second springs away from the second support plate. The fixing plate is fixedly mounted on a second fixing rod at the rear. A limiting wheel that cooperates with a cam is fixedly mounted on the rear side of the fixing plate. A second arc-shaped locking seat for limiting and locking the second fixing rod is fixedly mounted on the second support plate. The second arc-shaped locking seat and the second fixing rod are connected by a ball bearing rolling connection.

[0017] Preferably, the adaptive pressing wheel includes several rotating rods rotatably mounted between two mounting plates. Several fixed rings corresponding to the conveying wheel are fixedly sleeved on the rotating rods. Several fixed sleeves are fixedly mounted on the outside of the fixed rings. A movable block is slidably connected inside the fixed sleeve. A telescopic rod is fixedly mounted at the center of the movable block. An arc-shaped block is fixedly mounted after the telescopic rod slides through the end of the fixed sleeve. A flexible silicone wheel is sleeved on the outside of the multiple arc blocks. Several telescopic sections are evenly fixedly mounted on the flexible silicone wheel. One end of a No. 1 spring is fixedly connected to one side of the movable block. The other end of the No. 1 spring is fixedly connected to the inner wall of the fixed sleeve. A driven gear is fixedly sleeved after the front end of the rotating rod rotates through the mounting plate. A driving gear that meshes with the driven gear is fixedly sleeved after the front end of the conveying shaft rotates through the mounting plate.

[0018] Preferably, both the pickling machine and the water rinsing machine are equipped with a filtration mechanism. The filtration mechanism includes a side plate fixedly connected to the mounting plate, a sliding rail fixedly installed at the bottom of the side plate, and a filter plate slidably inserted between two adjacent sliding rails. Both the pickling machine and the water rinsing machine are equipped with a collection cover at the bottom, and a drain pipe is fixedly installed at the bottom of the collection cover.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention uses a conveying mechanism to transport PCB boards from right to left, uses an acid pickling machine to pickle the PCB boards, uses a reciprocating rotary cleaning mechanism to rinse them with clean water, uses a cold air dryer and a hot air dryer to dry them, and uses a flipping mechanism to flip them after drying. This achieves automatic cleaning, drying, flipping and conveying of PCB boards with a high degree of automation.

[0021] 2. This invention, through the coordinated use of a drive component, a reciprocating component, and a rotating component, drives the rotating nozzle to move linearly back and forth while simultaneously rotating the nozzle. This achieves both reciprocating linear spraying and rotating spraying, increasing the coverage area of ​​the rinsing. Moreover, the dynamic rinsing reduces blind spots compared to fixed nozzle rinsing. The complex water flow pattern generated by the rotation and reciprocating motion increases the shearing force on the stains, which helps to peel off and remove contaminants, thus improving the cleaning effect and efficiency.

[0022] 3. This invention, through the setting of adaptive pressing rollers, uses a spring to drive the adaptive extension and retraction of flexible silicone rollers. When conveying PCBs of different thicknesses, the adaptive extension and retraction of flexible silicone rollers presses and conveys the top of the PCB, eliminating the need to adjust the equipment according to the thickness of the PCB, thus facilitating the conveying of PCBs of different sizes.

[0023] 4. This invention uses a cold air dryer for primary drying of the cleaned PCB board, and a hot air dryer for secondary drying. After drying, the board is conveyed to a flipping mechanism. While flipping the board, a suction fan sprays filtered air from the air outlet to blow air onto the dried PCB board, preventing dust from falling onto the PCB board during flipping and simultaneously cooling the PCB board. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the overall structure of the present invention;

[0025] Figure 2 This is a partial sectional view of the overall structure of the present invention;

[0026] Figure 3 This is a rear view of the overall structure of the present invention;

[0027] Figure 4This is a partial structural cross-sectional view of the present invention;

[0028] Figure 5 This is a perspective view of the conveying mechanism of the present invention;

[0029] Figure 6 This is a perspective view of the reciprocating rotary cleaning mechanism and conveying mechanism of the present invention;

[0030] Figure 7 This is a partial cross-sectional view of the reciprocating rotary cleaning mechanism of the present invention;

[0031] Figure 8 This is the invention Figure 7 Enlarged view of region A in the middle;

[0032] Figure 9 This is the invention Figure 7 Enlarged view of region B in the middle;

[0033] Figure 10 This is a partial cross-sectional view of the adaptive pressing wheel of the present invention;

[0034] Figure 11 This is a partial cross-sectional view of the flipping mechanism of the present invention;

[0035] Figure 12 This is a perspective view of the cold air dryer, hot air dryer, and flipping mechanism of the present invention.

[0036] In the diagram: 1. Pickling machine; 2. Clean water rinsing machine; 3. Cold air dryer; 4. Hot air dryer; 5. Turning box; 6. Turning mechanism; 61. Servo motor No. 1; 62. Central rotating shaft; 63. Turning rod; 64. Fixed rod No. 3; 65. Air outlet; 66. Rotating cylinder; 67. Rotating disk; 68. Air supply pipe; 69. Connecting pipe; 7. Adaptive pressing wheel; 71. Rotating rod; 72. Fixed ring; 73. Arc-shaped block; 74. Movable block; 75. Spring No. 1; 76. 77. Flexible silicone wheel; 78. Telescopic rod; 89. Fixed sleeve; 80. Reciprocating rotary cleaning mechanism; 81. Drive assembly; 811. Worm gear No. 1; 812. Worm gear No. 1; 813. Bearing plate; 814. Cam; 815. Transmission rod; 82. Reciprocating assembly; 821. Limiting sleeve; 822. Spring No. 2; 823. Fixed plate; 824. Limiting wheel; 825. Arc-shaped locking seat No. 2; 83. Rotating assembly; 831. Guide rod; 832. Fixed rod No. 2; 83 3. Washing roller; 834. Diverter pipe; 835. Rack; 836. Rotating pipe; 837. Rotating nozzle; 838. Gear ring; 84. Support plate No. 2; 9. Conveying mechanism; 91. Servo motor No. 2; 92. Gear transmission assembly; 921. Gearbox; 922. Fixed shaft; 923. Driving bevel gear; 924. Driven bevel gear; 93. Worm gear No. 2; 94. Worm No. 2; 95. Conveying shaft; 96. Conveying wheel; 97. U-shaped plate; 98. Drive shaft; 10. 101. Filtration mechanism; 102. Collection hood; 103. Filter plate; 104. Insertion slide rail; 105. Side plate; 11. Column; 12. Wiring harness box; 13. Filter cartridge; 14. Roller conveyor; 15. Pickling spray roller; 16. Electrical control cabinet; 17. Suction fan; 18. Drain pipe; 19. Mounting plate; 20. Fixed rod No. 1; 21. Fixed nozzle; 22. Support plate No. 1; 23. Arc-shaped locking seat No. 1; 24. Guide roller; 25. Driven gear; 26. Driven gear. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Example: Please refer to Figure 1 and Figure 2A PCB board copper plating cleaning machine includes an acid pickling machine 1, a clean water rinsing machine 2 on the left side of the acid pickling machine 1, a cold air dryer 3 on the left side of the clean water rinsing machine 2, a hot air dryer 4 on the left side of the cold air dryer 3, and a flipping box 5 on the left side of the hot air dryer 4. The acid pickling machine 1, the clean water rinsing machine 2, the cold air dryer 3, and the hot air dryer 4 are all equipped with a conveying mechanism 9 for conveying PCB boards. The PCB boards are conveyed and cleaned from right to left. The acid pickling machine 1 is equipped with several acid pickling spray rollers 15 arranged symmetrically on the top and bottom. The clean water rinsing machine 2 is equipped with adaptive pressing rollers 7 for conveying PCB boards of different sizes and a reciprocating rotary cleaning mechanism 8 for rotating and reciprocatingly rinsing the PCB boards.

[0039] In use, the conveying mechanism 9 transports the PCB board to be cleaned from right to left. During the transport process, it passes through the pickling machine 1, the water rinsing machine 2, the cold air dryer 3, the hot air dryer 4, and the flipping box 5 in sequence. The pickling machine 1 is used to pickle the PCB board, the water rinsing machine 2 is used to rinse the pickled PCB board, the cold air dryer 3 is used to dry the rinsed PCB board with cold air, and the hot air dryer 4 is used to dry the PCB board with hot air. The reciprocating rotary cleaning mechanism 8 rinses the PCB board through reciprocating linear spray and rotary spray.

[0040] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 The pickling machine 1, the clean water rinsing machine 2, the cold air dryer 3, and the hot air dryer 4 are symmetrically arranged with two mounting plates 19. The conveying mechanism 9 includes a U-shaped plate 97 fixedly installed on the right side of the pickling machine 1. Several conveying shafts 95 rotatably pass through the U-shaped plate 97 and the mounting plate 19. Several conveying wheels 96 for supporting and conveying PCB boards are sleeved and fixed on each conveying shaft 95. A drive shaft 98 is rotatably installed on the U-shaped plate 97 and the mounting plate 19. A second worm gear 93 is fixedly sleeved at the rear end of each of the multiple conveying shafts 95. A gear transmission assembly 92 is provided on the rear side of the pickling machine 1. The gear transmission assembly 92 is equipped with a second servo motor 91 at the top. The gear transmission assembly 92 includes a gearbox 921 fixedly connected to the rear side of the pickling machine 1. The output end of the second servo motor 91 is fixedly connected to the input end of the gearbox 921. The output shaft of the gearbox 921 is fixedly connected to a fixed shaft 922. The fixed shaft 922 rotates through the rear side of the pickling machine 1 and is fixedly sleeved with a driving bevel gear 923. Several second worms 94 that mesh with the second worm gear 93 are evenly fixedly sleeved on the outside of the transmission shaft 98. A driven bevel gear 924 that meshes with the driving bevel gear 923 is fixedly sleeved in the middle of the transmission shaft 98.

[0041] In use, start the second servo motor 91. The output end of the second servo motor 91 drives the input shaft of the gearbox 921 to rotate, and at the same time drives the output shaft of the gearbox 921 and the fixed shaft 922 on it to rotate. This synchronously drives the driving bevel gear 923 and the driven bevel gear 924 to rotate, and at the same time drives the transmission shaft 98 and the multiple second worm gears 94 on it to rotate. This synchronously drives the second worm wheel 93 and the conveyor shaft 95 on it to rotate, and then simultaneously drives the conveyor wheel 96 to rotate. The conveyor wheel 96 is used to convey the PCB board from right to left.

[0042] Please see Figure 2 , Figure 4 and Figure 5 Inside the pickling machine 1, two mounting plates 19 are fixedly installed with several No. 1 support plates 22 at their top and bottom. Each of the two No. 1 support plates 22 is provided with a No. 1 fixing rod 20. A pickling spray roller 15 is fixedly installed between the two No. 1 fixing rods 20. Several fixed nozzles 21 are evenly installed at the bottom of the pickling spray roller 15. A No. 1 arc-shaped locking seat 23 for limiting and fixing the No. 1 fixing rod 20 is fixedly installed on the No. 1 support plate 22. The No. 1 arc-shaped locking seat 23 and the No. 1 fixing rod 20 are connected by ball bearings. The pickling spray roller 15 has a hollow structure and is fixedly connected to the water pump in the pickling tank through a hose.

[0043] After the PCB board is conveyed into the pickling machine 1 by the conveying mechanism 9, the water pump in the pickling tank is started. The water pump delivers the pickling solution to the pickling spray roller 15, and then sprays it onto the PCB board from the fixed nozzle 21. The pickling spray roller 15 and the fixed nozzle 21, which are symmetrically arranged, pickle the upper and lower sides of the PCB board at the same time, realizing the synchronous pickling of both sides.

[0044] Please see Figure 2 , Figure 7 and Figure 10 The adaptive pressing wheel 7 includes several rotating rods 71 ​​uniformly rotatably mounted between two mounting plates 19. Several fixed rings 72 corresponding to the positions of the conveyor wheel 96 are fixedly sleeved on the rotating rods 71. Several fixed sleeves 78 are uniformly fixedly mounted on the outside of the fixed rings 72. A movable block 74 is slidably connected inside the fixed sleeve 78. A telescopic rod 77 is fixedly mounted at the center of the movable block 74. An arc-shaped block 73 is fixedly mounted after the telescopic rod 77 slides through the end of the fixed sleeve 78. A flexible silicone wheel 76 is uniformly sleeved on the outside of the multiple arc-shaped blocks 73. Several telescopic sections are uniformly fixedly mounted on the flexible silicone wheel 76. A first spring 75 is fixedly mounted on one side of the movable block 74. The end of the first spring 75 away from the movable block 74 is fixedly connected to the inner wall of the fixed sleeve 78. A driven gear 25 is fixedly sleeved after the front end of the rotating rod 71 rotates through the mounting plate 19. A drive gear 26 that meshes with the driven gear 25 is fixedly sleeved after the front end of the conveyor shaft 95 inside the clean water washing machine 2 rotates through the mounting plate 19.

[0045] When the PCB board is conveyed into the clean water rinsing machine 2 by the conveying mechanism 9, in the initial state, the first spring 75 is in an extended state, which drives the movable block 74 and the telescopic rod 77 on it to move away from the fixed ring 72. At the same time, it drives the arc block 73 to move away from the fixed ring 72, thereby realizing the outward expansion of the flexible silicone wheel 76. The flexible silicone wheel 76 is made of silicone material. When the conveying mechanism 9 rotates, it drives the drive gear 26 to rotate, which in turn drives the driven gear 25 to rotate. This drives the fixed ring 72 and the fixed sleeve 78 on it to rotate, which indirectly drives the flexible silicone wheel 76 to rotate. The PCB board is conveyed by the compression of the flexible silicone wheel 76 and the conveying wheel 96. When the flexible silicone wheel 76 contacts the PCB board, the flexible silicone wheel 76 contracts, which drives the arc block 73 and the telescopic rod 77 to contract, which indirectly drives the first spring 75 to contract. This realizes the adaptive contraction of the flexible silicone wheel 76, which is convenient for limiting and fixing PCB boards of different thicknesses and is beneficial for conveying PCB boards of different thicknesses.

[0046] Please see Figure 2 , Figure 6 , Figure 7 and Figure 8The reciprocating rotary cleaning mechanism 8 includes several second support plates 84 that are symmetrically and uniformly fixedly connected to two mounting plates 19 inside the clean water rinsing machine 2. A rotating component 83 is arranged between the two second support plates 84 that are symmetrically arranged front to back. A reciprocating component 82 is arranged behind the rotating component 83. A drive component 81 is arranged between the two reciprocating components 82. The drive component 81 includes two bearing plates 813 that are symmetrically fixedly installed on the mounting plate 19 located on the rear side. A transmission rod 815 passes through the two bearing plates 813 and rotates together. A first worm gear 811 is fixedly sleeved in the middle of the transmission rod 815. Several first worms 812 that mesh with the first worm gear 811 are fixedly sleeved on the transmission shaft 98 located inside the clean water rinsing machine 2. Cams 814 are fixedly sleeved at the top and bottom of the transmission rod 815. The rotating component 83 includes a second fixed rod 84 that is slidably connected to the second support plate 84. 32. A guide rod 831 is fixedly installed on the outside of the second fixed rod 832. The guide rod 831 is slidably connected inside the second support plate 84. A flushing roller 833 is fixedly installed between the two second fixed rods 832. Several diversion pipes 834 are fixedly connected to the bottom of the flushing roller 833. A rotating pipe 836 is rotatably installed at the bottom of the diversion pipe 834. A sealing ring is provided at the rotatable connection between the diversion pipe 834 and the rotating pipe 836 to effectively prevent water leakage. A rotating nozzle 837 is fixedly installed at the bottom of the rotating pipe 836. A toothed ring 838 is fixedly sleeved on the outside of the rotating pipe 836. A rack 835 that meshes with the toothed ring 838 is fixedly connected between the two mounting plates 19. Multiple flushing rollers 833 are fixedly connected to a water pump located inside the deionized water tank through hoses. The toothed ring 838 and the rack 835 are made of polytetrafluoroethylene to effectively prevent acid from corroding the toothed ring 838 and the rack 835.

[0047] Please see Figure 2 , Figure 6 , Figure 7 and Figure 9 The reciprocating assembly 82 includes several limiting sleeves 821 uniformly fixedly installed on the second support plate 84 located on the rear side. A second spring 822 is fixedly sleeved inside the limiting sleeve 821. The ends of the multiple second springs 822 away from the second support plate 84 are jointly fixedly installed on a fixing plate 823. The fixing plate 823 is fixedly installed on the second fixing rod 832 on the rear side. A limiting wheel 824 that cooperates with the cam 814 is fixedly installed on the rear side of the fixing plate 823. A second arc-shaped locking seat 825 for limiting and locking the second fixing rod 832 is fixedly installed on the second support plate 84. The second arc-shaped locking seat 825 and the second fixing rod 832 are connected by ball bearings.

[0048] In use, after the PCB board has undergone acid pickling, it is conveyed into the clean water rinsing machine 2 via the conveying mechanism 9. During this process, the drive shaft 98 in the conveying mechanism 9 rotates, simultaneously driving the first worm gear 812 to rotate, and simultaneously driving the first worm wheel 811 to rotate, which in turn drives the transmission rod 815 and its cam 814 to rotate. As the cam 814 rotates, when its protruding part contacts the limit wheel 824, it drives the fixed plate 823 and its second fixed rod 832 to move forward, simultaneously compressing the second spring 822. When the protruding part of the cam 814 moves away from the limit wheel 824, under the restoring force of the second spring 822, it drives the fixed plate 823 and its second fixed rod 832 to move backward, simultaneously driving the rinsing roller 833 and its diverter pipe 834 to reciprocate back and forth, simultaneously driving the rotating pipe 83... The rotary nozzle 837 on the 6 reciprocates back and forth, simultaneously driving the toothed ring 838 to reciprocate back and forth. While the toothed ring 838 reciprocates back and forth, it meshes with the rack 835, synchronously driving the toothed ring 838 and the rotating tube 836 on it to rotate back and forth, and simultaneously driving the rotary nozzle 837 to rotate back and forth. At this time, the water pump inside the deionized water tank is activated, and the water pump delivers the deionized water stored in the tank to the rinsing roller 833. The deionized water is then delivered to the diversion pipe 834 and subsequently sprayed out from the rotary nozzle 837, realizing the back and forth reciprocating rinsing and rotational rinsing of deionized water, increasing the rinsing coverage area, and the dynamic rinsing reduces cleaning blind spots compared to fixed nozzle rinsing. The complex water flow pattern generated by the rotation and reciprocating motion increases the shearing force on the stains, which helps to peel off and remove contaminants, improving the cleaning effect and cleaning efficiency.

[0049] Please see Figure 1 , Figure 3 and Figure 12 The rear sides of the cold air dryer 3 and the hot air dryer 4 are fixedly connected to a support plate, and three suction fans 17 are evenly installed on the top of the support plate. The top of the air inlet of the suction fan 17 is equipped with a filter cartridge 13. The air outlet of the three suction fans 17 is connected to the cold air dryer 3, the hot air dryer 4 and the flipping mechanism 6 through pipes respectively. The rear sides of the pickling machine 1, the water rinsing machine 2 and the hot air dryer 4 are all fixedly installed with columns 11. The top of the multiple columns 11 is fixedly installed with a wire harness box 12. The top of the water rinsing machine 2 is equipped with an electrical control cabinet 16.

[0050] In use, after the reciprocating rotary cleaning mechanism 8 cleans the PCB board, the conveying mechanism 9 continues to convey the PCB board to the cold air dryer 3. At this time, the suction fan 17 is started to deliver cold air from the outside to the cold air dryer 3 to dry the cleaned PCB board with cold air. Then, it continues to be conveyed to the hot air dryer 4. The hot air dryer 4 is equipped with an electric heating tube. The suction fan 17 delivers filtered air to the hot air dryer 4 to dry the PCB board with hot air. After drying, the conveying mechanism 9 continues to convey the PCB board to the flipping mechanism 6.

[0051] Please see Figure 3 and Figure 11 The flipping mechanism 6 includes a first servo motor 61 fixedly installed on the rear side of the flipping box 5. The output end of the first servo motor 61 rotates through the rear side wall of the flipping box 5 and is fixedly connected to a central rotating shaft 62. The central rotating shaft 62 is rotatably installed inside the flipping box 5. A rotating cylinder 66 is fixedly sleeved on the outside of the central rotating shaft 62. The rotating cylinder 66 has a hollow structure. Roller conveyors 14 are provided on the top of both the left and right sides of the flipping box 5. The roller conveyors 14 are conventional existing technology and can be selected according to the usage requirements. Several guide rollers 24 are rotatably installed on the top left and right sides inside the flipping box 5.

[0052] Please see Figure 11 and Figure 12 Several No. 3 fixing rods 64 are evenly fixedly installed in the middle of the inner wall of the rotating cylinder 66. The multiple No. 3 fixing rods 64 are together fixedly installed on the central rotating shaft 62. The rotating cylinder 66 is rotatably connected to the rear side of the rotating disk 67. Several connecting pipes 69 are fixedly connected to the rotating disk 67. The multiple connecting pipes 69 are fixedly connected to the rear side of the flipping box 5 and are together fixedly connected to the annular pipe. The right side of the annular pipe is fixedly connected to the air supply pipe 68. The air supply pipe 68 is connected to the air outlet of the suction fan 17. Several flipping rods 63 are evenly fixedly installed on the outside of the rotating cylinder 66. An air blowing port 65 is opened on the outside of the rotating cylinder 66 between two adjacent flipping rods 63.

[0053] In use, after the dried PCB board is conveyed to the roller conveyor 14, it then enters the gap between the adjacent flipping rods 63 via the guide rollers 24. At this time, driven by the output of the first servo motor 61, the central rotating shaft 62 and the third fixed rod 64 on it rotate synchronously, which in turn drives the rotating cylinder 66 to rotate, and synchronously drives the flipping rods 63 to rotate. The flipping rods 63 are used to realize the automatic flipping of the PCB board. At the same time, the suction fan 17 delivers filtered air through the air supply pipe 68 to the annular pipe, and then through the connecting pipe 69 to the rotating cylinder 66. The filtered air is then sprayed out from the air outlet 65 and blown onto the PCB board. The blown air cleans the surface of the PCB board, preventing dust from falling onto the PCB surface during flipping, and also has the effect of cooling the PCB board surface.

[0054] Please see Figure 2 and Figure 4 Both the pickling machine 1 and the clean water rinsing machine 2 are equipped with a filtration mechanism 10. The filtration mechanism 10 includes a side plate 104 fixedly connected to the mounting plate 19. A sliding rail 103 is fixedly installed at the bottom of the side plate 104. A filter plate 102 is slidably inserted between two adjacent sliding rails 103. A collection cover 101 is provided on the bottom surface of both the pickling machine 1 and the clean water rinsing machine 2. A drain pipe 18 is fixedly installed at the bottom of the collection cover 101. During use, the wastewater from pickling and rinsing falls onto the filter plate 102. The filter plate 102 filters the wastewater from pickling and the deionized water from rinsing. The filtered wastewater is collected by the collection cover 101 and then discharged into the post-treatment tank for treatment through the drain pipe 18.

[0055] It should be noted that, in the operation of this PCB board copper plating cleaning machine, the water pump in the pickling tank is first started, which delivers the pickling solution to the pickling spray roller 15, and then sprays it out from the fixed nozzle 21. Next, the water pump inside the deionized water tank is started, which delivers the deionized water stored in the tank to the rinsing roller 833. The deionized water is then delivered to the diversion pipe 834 and sprayed out from the rotating nozzle 837. The PCB board to be cleaned is then placed on top of the conveyor wheel 96 on the U-shaped plate 97. At this time, the second servo motor 91 is started, and the output of the second servo motor 91 drives the input shaft of the gearbox 921 to rotate, simultaneously driving the gears... The output shaft of box 921 and its fixed shaft 922 rotate, synchronously driving the driving bevel gear 923 and the driven bevel gear 924 to rotate, which in turn drives the transmission shaft 98 and its multiple second worm gears 94 to rotate, synchronously driving the second worm wheel 93 and its conveyor shaft 95 to rotate, which in turn drives the conveyor wheel 96 to rotate. The conveyor wheel 96 conveys the PCB board from right to left to the pickling machine 1, where the pickling liquid sprayed by the pickling spray roller 15 rinses the PCB board. After pickling, the PCB board is conveyed to the clean water rinsing machine 2 by the continued conveying mechanism 9, where the reciprocating rotary cleaning mechanism 8 simultaneously rinses both sides of the PCB board. The combined rotary rinsing increases the rinsing coverage area, and the dynamic rinsing reduces blind spots compared to fixed nozzle rinsing. The complex water flow pattern generated by the rotation and reciprocating motion increases the shearing force on the stains, helping to peel off and remove contaminants, thus improving cleaning effect and efficiency. After rinsing, the PCB board is conveyed to the cold air dryer 3 for cold air drying, and then to the hot air dryer 4 for hot air drying. After drying, it is conveyed to the roller conveyor 14, and then enters the gap of the adjacent flipping rod 63 via the guide roller 24. At this time, driven by the output of the first servo motor 61, the central rotating shaft is driven. The PCB board is automatically flipped by rotating rod 62 and its third fixed rod 64. At the same time, the rotating cylinder 66 rotates, which in turn drives the flipping rod 63 to rotate. The flipping rod 63 is used to achieve automatic flipping of the PCB board. While flipping, the suction fan 17 delivers filtered air through the air supply pipe 68 to the annular pipe, and then through the connecting pipe 69 to the rotating cylinder 66. The filtered air is then sprayed out from the air outlet 65 and blown onto the PCB board. The blown air cleans the surface of the PCB board, preventing dust from falling onto the PCB surface during flipping, and also has the effect of cooling the PCB board surface.

[0056] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A PCB board copper plating cleaning machine, comprising an acid pickling machine (1), characterized in that: The pickling machine (1) is equipped with a water rinsing machine (2) on the left side, a cold air dryer (3) on the left side of the water rinsing machine (2), a hot air dryer (4) on the left side of the cold air dryer (3), and a turning box (5) on the left side of the hot air dryer (4). The pickling machine (1), water rinsing machine (2), cold air dryer (3) and hot air dryer (4) are all equipped with a conveying mechanism (9) for conveying PCB boards. The pickling machine (1) is equipped with several pickling spray rollers (15) arranged symmetrically on the top and bottom. The water rinsing machine (2) is equipped with an adaptive pressing wheel (7) and a reciprocating rotary cleaning mechanism (8). The pickling machine (1), the water rinsing machine (2), the cold air dryer (3) and the hot air dryer (4) are all equipped with two mounting plates (19). The conveying mechanism (9) includes a U-shaped plate (97) fixedly installed on the right side of the pickling machine (1). Several conveying shafts (95) are rotatably passed through the U-shaped plate (97) and the mounting plate (19). Several conveying wheels (96) for supporting and conveying PCB boards are sleeved and fixed on each conveying shaft (95). A drive shaft (98) is rotatably installed on the U-shaped plate (97) and the mounting plate (19). The reciprocating rotary cleaning mechanism (8) includes several second support plates (84) fixedly connected to two mounting plates (19). A rotating component (83) is provided between the two second support plates (84) which are symmetrical in front and behind. A reciprocating component (82) is provided behind the rotating component (83). A driving component (81) is provided between the two reciprocating components (82). The drive assembly (81) includes two bearing plates (813) mounted on a mounting plate (19) on the rear side. A transmission rod (815) rotates between the two bearing plates (813). A first worm gear (811) is fixedly sleeved in the middle of the transmission rod (815). Several first worms (812) that mesh with the first worm gear (811) are fixedly sleeved on the transmission shaft (98) located inside the clean water rinsing machine (2). Cams (814) are fixedly sleeved at the top and bottom of the transmission rod (815). The rotating assembly (83) includes a second fixed rod (832) that is slidably connected to a second support plate (84). (832) A guide rod (831) is fixedly installed on the outside. The guide rod (831) is slidably connected inside the second support plate (84). A flushing roller (833) is fixedly installed between the two second fixed rods (832). Several diversion pipes (834) are fixedly connected to the bottom of the flushing roller (833). A rotating pipe (836) is rotatably installed at the bottom of the diversion pipe (834). A rotating nozzle (837) is fixedly installed at the bottom of the rotating pipe (836). A toothed ring (838) is fixedly sleeved on the outside of the rotating pipe (836). A rack (835) that meshes with the toothed ring (838) is fixedly connected between the two mounting plates (19). The reciprocating assembly (82) includes several limiting sleeves (821) installed on the second support plate (84) located on the rear side. A second spring (822) is fixedly sleeved inside the limiting sleeve (821). A fixing plate (823) is fixedly installed on the end of the multiple second springs (822) away from the second support plate (84). The fixing plate (823) is fixedly installed on the second fixing rod (832) on the rear side. A limiting wheel (824) that cooperates with the cam (814) is fixedly installed on the rear side of the fixing plate (823). A second arc-shaped locking seat (825) for limiting and locking the second fixing rod (832) is fixedly installed on the second support plate (84). The second arc-shaped locking seat (825) and the second fixing rod (832) are connected by rolling balls.

2. The PCB board copper plating cleaning machine according to claim 1, characterized in that: The cold air dryer (3) and the hot air dryer (4) are both fixedly connected to a support plate at the rear, and a suction fan (17) is installed on the top of the support plate. A filter cartridge (13) is installed on the top of the air inlet of the suction fan (17). The air outlet of the suction fan (17) is connected to the cold air dryer (3), the hot air dryer (4) and the turning mechanism (6) through pipes respectively. A column (11) is fixedly installed on the rear of the pickling machine (1), the water rinsing machine (2) and the hot air dryer (4). A wire harness box (12) is fixedly installed on the top of the column (11). An electrical control cabinet (16) is installed on the top of the water rinsing machine (2).

3. A PCB board cleaning machine after copper plating according to claim 2, characterized in that: The flipping mechanism (6) includes a first servo motor (61) fixedly installed on the rear side of the flipping box (5). The output end of the first servo motor (61) rotates through the rear side wall of the flipping box (5) and is fixedly connected to a central rotating shaft (62). The central rotating shaft (62) is rotatably installed inside the flipping box (5). A rotating cylinder (66) is fixedly sleeved on the outside of the central rotating shaft (62). Roller conveyors (14) are provided on the top of both the left and right sides of the flipping box (5). Several guide rollers (24) are rotatably installed on the top left and right sides inside the flipping box (5).

4. A PCB board cleaning machine after copper plating according to claim 3, characterized in that: The inner wall of the rotating cylinder (66) is equipped with several No. 3 fixed rods (64), and the multiple No. 3 fixed rods (64) are fixedly installed on the central rotating shaft (62). The rear side of the rotating cylinder (66) is rotatably connected to a rotating disk (67), and the rotating disk (67) is fixedly connected to several connecting pipes (69). The rear side of the multiple connecting pipes (69) is fixedly connected to the rear side of the flipping box (5) and connected to an annular pipe. The right side of the annular pipe is fixedly connected to an air supply pipe (68), and the air supply pipe (68) is connected to the air outlet of the suction fan (17). Several flipping rods (63) are evenly fixedly installed on the outside of the rotating cylinder (66), and an air blowing port (65) is opened between two adjacent flipping rods (63) on the outside of the rotating cylinder (66).

5. A PCB board cleaning machine after copper plating according to claim 1, characterized in that: Each of the multiple conveying shafts (95) has a second worm gear (93) fixedly sleeved at its rear end. A gear transmission assembly (92) is provided on the rear side of the pickling machine (1). A second servo motor (91) is provided on the top of the gear transmission assembly (92). The gear transmission assembly (92) includes a gearbox (921) fixedly connected to the rear side of the pickling machine (1). The output end of the second servo motor (91) is fixedly connected to the input end of the gearbox (921). A fixed shaft (922) is fixedly connected to the output shaft of the gearbox (921). The fixed shaft (922) rotates through the rear side of the pickling machine (1) and is fixedly sleeved with a driving bevel gear (923). Several second worms (94) that mesh with the second worm gear (93) are uniformly fixedly sleeved on the outside of the transmission shaft (98). A driven bevel gear (924) that meshes with the driving bevel gear (923) is fixedly sleeved in the middle of the transmission shaft (98).

6. A PCB board post-copper plating cleaning machine according to claim 1, characterized in that: Several No. 1 support plates (22) are fixedly installed on the top and bottom of the two mounting plates (19) located inside the pickling machine (1). A No. 1 fixing rod (20) is provided on the two No. 1 support plates (22) that are symmetrical front and back. A pickling spray roller (15) is fixedly installed between the two No. 1 fixing rods (20). Several fixed nozzles (21) are evenly installed at the bottom of the pickling spray roller (15). A No. 1 arc-shaped locking seat (23) for limiting and fixing the No. 1 fixing rod (20) is fixedly installed on the No. 1 support plate (22). The No. 1 arc-shaped locking seat (23) and the No. 1 fixing rod (20) are connected by ball bearings.

7. A PCB board cleaning machine after copper plating according to claim 1, characterized in that: The adaptive pressing wheel (7) includes several rotating rods (71) rotatably mounted between two mounting plates (19). Several fixed rings (72) corresponding to the conveying wheel (96) are fixedly sleeved on the rotating rods (71). Several fixed sleeves (78) are fixedly mounted on the outside of the fixed rings (72). Movable blocks (74) are slidably connected inside the fixed sleeves (78). A telescopic rod (77) is fixedly mounted at the center of the movable block (74). After the telescopic rod (77) slides through the end of the fixed sleeve (78), an arc-shaped block (73) is fixedly mounted thereon. A flexible silicone wheel (76) is fitted around the outside of each arc-shaped block (73). Several telescopic sections are evenly fixedly installed on the flexible silicone wheel (76). One end of a No. 1 spring (75) is fixedly connected to one side of the movable block (74). The other end of the No. 1 spring (75) is fixedly connected to the inner wall of the fixed sleeve (78). The front end of the rotating rod (71) rotates through the mounting plate (19) and is fixedly fitted with a driven gear (25). The front end of the conveying shaft (95) rotates through the mounting plate (19) and is fixedly fitted with a driving gear (26) that meshes with the driven gear (25).

8. A PCB board cleaning machine after copper plating according to claim 1, characterized in that: Both the pickling machine (1) and the water rinsing machine (2) are equipped with a filter mechanism (10). The filter mechanism (10) includes a side plate (104) fixedly connected to the mounting plate (19). A plug-in slide rail (103) is fixedly installed at the bottom of the side plate (104). A filter plate (102) is slidably plugged between two adjacent plug-in slide rails (103). A collection cover (101) is provided on the bottom surface of both the pickling machine (1) and the water rinsing machine (2). A drain pipe (18) is fixedly installed at the bottom of the collection cover (101).

Images