Cleaning machine for printed circuit board (PCB) after copper deposition

Abstract

The invention relates to the technical field of cleaning machines, in particular to a PCB after-copper-deposition cleaning machine which comprises a pickling machine, a clear water flushing machine is arranged on the left side of the pickling machine, a cold air drying machine is arranged on the left side of the clear water flushing machine, a hot air drying machine is arranged on the left side of the cold air drying machine, and a turnover box is arranged on the left side of the hot air drying machine. A conveying mechanism used for conveying PCBs is jointly arranged in the pickling machine, the clean water flushing machine, the cold air drying machine and the hot air drying machine, and the PCBs are conveyed and cleaned from right to left. Through cooperative use of the driving assembly, the reciprocating assembly and the rotating assembly, rotation of the rotating nozzles is synchronously achieved while the rotating nozzles are driven to do linear reciprocating motion; by means of the technical scheme, reciprocating linear spraying and rotary spraying are achieved, the washing coverage area is increased, compared with fixed spray head washing, dynamic washing reduces cleaning blind areas, shearing force to stains is increased through a complex water flow mode generated by rotation and reciprocating actions, pollutants can be stripped and taken away easily, and the cleaning effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning machines, and in particular relates to a cleaning machine for PCB boards after copper deposition. Background Art

[0002] PCBs, or printed circuit boards, are essential components in modern electronic devices. They support and connect various electronic components, and achieve electrical connections between these components through conductive paths. The production of PCBs involves multiple process steps, with copper plating being an essential part. After copper plating, chemical plating solutions, reducing agents, and other chemicals 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: 1. The existing PCB cleaning process includes pickling and high-pressure deionized water rinsing. During pickling, as it is a preliminary cleaning, the pressure during spraying is relatively low, and top crimping is not required. Only bottom support and transportation are required. However, deionized water rinsing requires thorough cleaning. During deionized water rinsing, a fixed nozzle is usually used to rinse the PCB board at a fixed angle. Due to the thickness of the copper plating layer 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 remove residual impurities and chemicals, resulting in poor cleaning efficiency and effect. 2. Existing PCB boards are usually dried with hot air after cleaning. After drying, they need to be turned over by a turning mechanism. However, during the turning process, dust easily adheres to the PCB board again, affecting the cleaning efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a PCB cleaning machine with a simple structure and reasonable design in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A PCB board post-copper plating cleaning machine, comprising a pickling machine, a clean water rinser provided on the left side of the pickling machine, a cold air dryer provided on the left side of the clean water rinser, a hot air dryer provided on the left side of the cold air dryer, and a turnover box provided on the left side of the hot air dryer; a conveying mechanism for conveying PCB boards is commonly provided inside the pickling machine, the clean water rinser, the cold air dryer, and the hot air dryer; a plurality of pickling spray rollers are symmetrically provided in the pickling machine, and an adaptive crimping wheel and a reciprocating rotating cleaning mechanism are provided in the clean water rinser; The pickling machine, water washing machine, cold air dryer and hot air dryer are commonly provided with two mounting plates inside. The conveying mechanism includes a U-shaped plate fixedly mounted on the right side of the pickling machine. The U-shaped plate and the mounting plate are both rotated through a plurality of conveying shafts. Each conveying shaft is sleeved and fixed with a plurality of conveying wheels for supporting and conveying PCB boards. A transmission shaft is mounted on the U-shaped plate and the mounting plate for rotation. The reciprocating rotating cleaning mechanism includes several No. 2 support plates fixedly connected to two mounting plates, a rotating assembly is arranged between the two No. 2 support plates that are symmetrical in front and back, a reciprocating assembly is arranged on the rear side of the rotating assembly, and a driving assembly is arranged between the two reciprocating assemblies.

[0005] Preferably, the cold air dryer and the hot air dryer are fixedly connected to a supporting plate at the rear side, and a suction fan is installed on the top of the supporting plate, a filter cartridge is provided on the top of the air inlet end of the suction fan, and the air outlet end 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 clean water flushing machine and the hot air dryer are all fixedly installed with columns at the rear side, a wiring harness box is fixedly installed on the top of the column, and an electric control cabinet is provided on the top of the clean water flushing machine.

[0006] 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 wall of the flipping box and is fixedly connected to a central rotating shaft. The central rotating shaft is rotatably installed in 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 the left and right sides of the flipping box, and a number of guide rollers are rotatably installed on the left and right sides of the top inside the flipping box.

[0007] Preferably, a plurality of No. 3 fixing rods are installed on the inner wall of the rotating cylinder, and the plurality of No. 3 fixing rods are fixedly installed on the central rotating shaft. A rotating disk is rotatably connected to the rear side of the rotating cylinder, and a plurality of connecting pipes are fixedly connected to the rotating disk. The rear sides of the plurality of connecting pipes are fixedly passed through the rear side of the flip box and are connected to an annular pipe. The right side of the annular pipe is fixedly connected to an air supply pipe, and the air supply pipe is connected to the air outlet end of the suction fan. A plurality of flip rods are evenly fixedly installed on the outside of the rotating cylinder, and an air blowing port is opened on the outside of the rotating cylinder between two adjacent flip rods.

[0008] Preferably, the rear ends of the plurality of conveying shafts are fixedly sleeved with a No. 2 worm gear, a gear transmission assembly is provided on the rear side of the pickling machine, a No. 2 servo motor is provided on the top of the gear transmission assembly, the gear transmission assembly includes a gear box fixedly connected to the rear side of the pickling machine, the output end of the No. 2 servo motor is fixedly connected to the input end of the gear box, the output shaft of the gear box is fixedly connected to a fixed shaft, and the fixed shaft rotates through the rear side of the pickling machine and is fixedly sleeved with a driving bevel gear, a number of No. 2 worms meshing with the No. 2 worm gear are evenly fixedly sleeved on the outside of the transmission shaft, and a driven bevel gear meshing with the driving bevel gear is fixedly sleeved on the middle part of the transmission shaft.

[0009] Preferably, a number of 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 the two No. 1 support plates that are symmetrical in front and back, a pickling spray roller is fixedly installed between the two No. 1 fixing rods, a number of fixed nozzles are evenly installed on 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, and the No. 1 arc-shaped locking seat and the No. 1 fixing rod are connected by ball rolling.

[0010] Preferably, the driving assembly includes two bearing plates installed on the mounting plate on the rear side, a transmission rod is rotatably passed through the two bearing plates, a No. 1 worm gear is fixedly sleeved on the middle of the transmission rod, and a number of No. 1 worm gears meshing with the No. 1 worm gear are fixedly sleeved on the transmission shaft located inside the clean water flushing machine, cams are fixedly sleeved on the top and bottom of the transmission rod, the rotating assembly includes a No. 2 fixed rod slidably connected to the No. 2 support plate, a guide rod is fixedly installed on the outside of the No. 2 fixed rod, the guide rod is slidably connected to the inside of the No. 2 support plate, a flushing roller is fixedly installed between the two No. 2 fixed rods, a number of diversion pipes are fixedly connected to the bottom of the flushing roller, a rotating pipe is rotatably installed on the bottom of the diversion pipe, a rotating nozzle is fixedly installed on the bottom of the rotating pipe, a gear ring is fixedly sleeved on the outside of the rotating pipe, and a rack meshing with the gear ring is fixedly connected between the two mounting plates.

[0011] Preferably, the reciprocating assembly includes several limiting sleeves installed on the No. 2 support plate located on the rear side, the limiting sleeves are fixedly sleeved with a No. 2 spring inside, and a fixing plate is fixedly installed on one end of the multiple No. 2 springs away from the No. 2 support plate, and the fixing plate is fixedly installed on the No. 2 fixing rod on the rear side, and a limiting wheel cooperating with the cam is fixedly installed on the rear side of the fixing plate, and a No. 2 arc-shaped locking seat for limiting and locking the No. 2 fixing rod is fixedly installed on the No. 2 support plate, and the No. 2 arc-shaped locking seat and the No. 2 fixing rod are connected by ball rolling.

[0012] Preferably, the adaptive pressing wheel includes several rotating rods rotatably mounted between two mounting plates, several fixing rings corresponding to the conveying wheels are fixedly sleeved on the rotating rods, several fixed sleeves are fixedly mounted on the outside of the fixing rings, a movable block is slidably connected inside the fixed sleeve, a telescopic rod is fixedly mounted at the center of the movable block, the telescopic rod slides through the end of the fixed sleeve and then fixedly mounted with an arc block, a plurality of arc blocks are commonly sleeved on the outside of a flexible silicone wheel, a plurality of telescopic sections are evenly fixedly mounted on the flexible silicone wheel, one side of the movable block is fixedly connected to one end of a No. 1 spring, the other end of the No. 1 spring is fixedly connected to the inner wall of the fixed sleeve, the front end of the rotating rod rotates through the mounting plate and then fixedly sleeved with a driven gear, and the front end of the conveying shaft rotates through the mounting plate and then fixedly sleeved with a driving gear meshing with the driven gear.

[0013] Preferably, the pickling machine and the clean water flushing machine are both provided with a filtering mechanism, the filtering mechanism includes a side panel fixedly connected to the mounting plate, a plug-in slide rail is fixedly installed on the bottom of the side panel, and a filter plate is slidably plugged between two adjacent plug-in slide rails. The bottom surface of the pickling machine and the clean water flushing machine are both provided with a collecting cover, and a drain pipe is fixedly installed on the bottom of the collecting cover.

[0014] The beneficial effects of the present invention are: 1. The present invention conveys the PCB board from right to left through a conveying mechanism, pickles the PCB board using a pickling machine, rinses it with clean water using a reciprocating rotary cleaning mechanism, and then dries it with air using a cold air dryer and a hot air dryer. After drying, it is flipped over using a flipping mechanism, thus realizing automatic cleaning, drying, flipping, and conveying of the PCB board with a high degree of automation.

[0015] 2. The present invention uses a driving component, a reciprocating component and a rotating component in coordination to drive the rotating nozzle to move back and forth in a straight line while synchronously realizing the rotation of the rotating nozzle, thereby realizing reciprocating linear spraying and rotary spraying, increasing the coverage area of ​​the flushing, and dynamic flushing reduces cleaning blind spots compared to fixed nozzle flushing. The complex water flow pattern generated by the rotation and reciprocating action increases the shear force on the stains, helps to peel off and remove pollutants, and improves the cleaning effect and cleaning efficiency.

[0016] 3. The present invention adopts the setting of an adaptive crimping wheel and drives the adaptive expansion and contraction of the flexible silicone wheel through a No. 1 spring. When conveying PCB boards of different thicknesses, the top of the PCB board is crimped and conveyed by the adaptive expansion and contraction flexible silicone wheel. There is no need to adjust the equipment according to the thickness of the PCB board, which facilitates the conveyance of PCB boards of different sizes.

[0017] 4. The present invention uses a cold air dryer to perform primary drying of the cleaned PCB board and a hot air dryer to perform secondary hot air drying. After drying, the board is transported to the turning mechanism. While the turning mechanism is turning the board, a suction fan blows filtered air from the air outlet to blow air over the dried PCB board, preventing dust from falling onto the PCB board during turning and simultaneously cooling the PCB board with air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the overall structure of the present invention; Figure 3 It is a rear view of the overall structure of the present invention; Figure 4 It is a partial structural cross-sectional view of the present invention; Figure 5 is a perspective view of the conveying mechanism of the present invention; Figure 6 It is a three-dimensional diagram of the reciprocating rotary cleaning mechanism and the conveying mechanism of the present invention; Figure 7 It is a partial cross-sectional view of the reciprocating rotary cleaning mechanism of the present invention; Figure 8 The present invention Figure 7 A magnified schematic diagram of area A in the middle; Figure 9 The present invention Figure 7 A magnified schematic diagram of area B in the middle; Figure 10 is a partial cross-sectional view of the adaptive crimping wheel of the present invention; Figure 11 It is a partial cross-sectional view of the turning mechanism of the present invention; Figure 12 It is a three-dimensional diagram of the cold air dryer, hot air dryer and turnover mechanism of the present invention.

[0019] In the figure: 1, pickling machine; 2, water washing machine; 3, cold air dryer; 4, hot air dryer; 5, turnover box; 6, turnover mechanism; 61, No. 1 servo motor; 62, center shaft; 63, turnover rod; 64, No. 3 fixed rod; 65, air blowing port; 66, rotating cylinder; 67, rotating disk; 68, air pipe; 69, connecting pipe; 7, adaptive crimping wheel; 71, rotating rod; 72, fixed ring; 73, arc block; 74, movable block; 75, No. 1 spring; 76, Flexible silicone wheel; 77, telescopic rod; 78, fixed sleeve; 8, reciprocating cleaning mechanism; 81, drive assembly; 811, worm gear No. 1; 812, worm No. 1; 813, bearing plate; 814, cam; 815, transmission rod; 82, reciprocating assembly; 821, limiting sleeve; 822, No. 2 spring; 823, fixed plate; 824, limiting wheel; 825, No. 2 arc-shaped locking seat; 83, rotating assembly; 831, guide rod; 832, No. 2 fixing rod; 83 3. Rinsing 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. Gear box; 922. Fixed shaft; 923. Driving bevel gear; 924. Driven bevel gear; 93. Worm gear No. 2; 94. Worm gear No. 2; 95. Conveying shaft; 96. Conveying wheel; 97. U-shaped plate; 98. Transmission shaft; 10 , filtering mechanism; 101, collecting hood; 102, filter plate; 103, plug-in slide rail; 104, side panel; 11, column; 12, harness box; 13, filter cartridge; 14, roller conveyor; 15, pickling spray roller; 16, electric control cabinet; 17, suction fan; 18, drain pipe; 19, mounting plate; 20, No. 1 fixing rod; 21, fixed nozzle; 22, No. 1 support plate; 23, No. 1 arc locking seat; 24, guide roller; 25, driven gear; 26, driving gear. DETAILED DESCRIPTION

[0020] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Example: See Figure 1 and Figure 2A PCB board post-copper plating cleaning machine includes a pickling machine 1, a clean water rinsing machine 2 is provided on the left side of the pickling machine 1, a cold air dryer 3 is provided on the left side of the clean water rinsing machine 2, a hot air dryer 4 is provided on the left side of the cold air dryer 3, and a turning box 5 is provided on the left side of the hot air dryer 4. The pickling machine 1, the clean water rinsing machine 2, the cold air dryer 3 and the hot air dryer 4 are commonly provided with a conveying mechanism 9 for conveying PCB boards. The PCB boards are conveyed from right to left for cleaning. A number of pickling spray rollers 15 are symmetrically arranged in the upper and lower parts of the pickling machine 1. The clean water rinsing machine 2 is provided with an adaptive pressing wheel 7 for conveying PCB boards of different sizes and a reciprocating rotating cleaning mechanism 8 for rotating and reciprocatingly rinsing the PCB boards.

[0022] During use, the conveying mechanism 9 is used to convey the PCB board to be cleaned from right to left. During the conveying process, it passes through the pickling machine 1, the clean water rinsing machine 2, the cold air dryer 3, the hot air dryer 4 and the turning box 5 in sequence. The pickling machine 1 is used to pickle the PCB board, the clean water rinsing machine 2 is used to rinse the PCB board after pickling, the cold air dryer 3 is used to cold-dry the rinsed PCB board, and the hot air dryer 4 is used to hot-dry the PCB board. The reciprocating rotary cleaning mechanism 8 rinses the PCB board through reciprocating linear spraying and rotary spraying.

[0023] See also Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the pickling machine 1, the water washing machine 2, the cold air dryer 3 and the hot air dryer 4 are symmetrically provided with two mounting plates 19. The conveying mechanism 9 includes a U-shaped plate 97 fixedly mounted on the right side of the pickling machine 1. The U-shaped plate 97 and the mounting plate 19 rotate through a number of conveying shafts 95. Each conveying shaft 95 is sleeved and fixed with a number of conveying wheels 96 for supporting and conveying PCB boards. The U-shaped plate 97 and the mounting plate 19 are jointly rotated with a transmission shaft 98; the rear ends of the multiple conveying shafts 95 are fixedly sleeved with a No. 2 worm gear 93, and a gear transmission assembly 92 is provided on the rear side of the pickling machine 1. A No. 2 servo motor 91 is provided on the top of the wheel transmission assembly 92. The gear transmission assembly 92 includes a gear box 921 fixedly connected to the rear side of the pickling machine 1. The output end of the No. 2 servo motor 91 is fixedly connected to the input end of the gear box 921. The output shaft of the gear box 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. A number of No. 2 worms 94 meshing with the No. 2 worm gear 93 are evenly fixedly sleeved on the outside of the transmission shaft 98. A driven bevel gear 924 meshing with the driving bevel gear 923 is fixedly sleeved in the middle of the transmission shaft 98.

[0024] When in use, start the No. 2 servo motor 91, and the output end of the No. 2 servo motor 91 drives the input shaft of the gear box 921 to rotate, and at the same time drives the output shaft of the gear box 921 and the fixed shaft 922 thereon to rotate, and synchronously drives the active bevel gear 923 and the driven bevel gear 924 to rotate, and at the same time drives the transmission shaft 98 and the multiple No. 2 worm gears 94 thereon to rotate, and synchronously drives the No. 2 worm gear 93 and the conveying shaft 95 thereon to rotate, and then drives the conveying wheel 96 to rotate at the same time, and uses the conveying wheel 96 to convey the PCB board from right to left.

[0025] See also Figure 2 、 Figure 4 and Figure 5 , several No. 1 support plates 22 are fixedly installed on the top and bottom of the two mounting plates 19 inside the pickling machine 1, and No. 1 fixing rods 20 are provided on the two No. 1 support plates 22 that are symmetrical in front and back. A pickling spray roller 15 is fixedly installed between the two No. 1 fixing rods 20, and several fixed nozzles 21 are evenly installed on 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 rolling. The pickling spray roller 15 is a hollow structure and is fixedly connected to the water pump in the pickling tank through a hose.

[0026] After the PCB board is transported to the inside of the pickling machine 1 through the conveying mechanism 9, the water pump in the pickling tank is started. The water pump transports the pickling liquid 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 up and down, pickle the upper and lower surfaces of the PCB board at the same time, achieving synchronous pickling of both sides.

[0027] See also Figure 2 、 Figure 7 and Figure 10 The adaptive pressing wheel 7 includes several rotating rods 71 ​​mounted between the two mounting plates 19 for uniform rotation. Several fixing rings 72 corresponding to the positions of the conveying wheel 96 are fixedly sleeved on the rotating rod 71. Several fixing sleeves 78 are evenly fixedly mounted on the outside of the fixing ring 72. A movable block 74 is slidably connected to the inside of the fixed sleeve 78. A telescopic rod 77 is fixedly mounted on the center of the movable block 74. The telescopic rod 77 slides through the end of the fixed sleeve 78 and is fixedly mounted with an arc block 73. The outer surfaces of the multiple arc blocks 73 are jointly sleeved with a flexible silicone wheel 76. Several telescopic sections are evenly fixedly mounted on the flexible silicone wheel 76. A No. 1 spring 75 is fixedly mounted on one side of the movable block 74. The end of the No. 1 spring 75 away from the movable block 74 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 sleeved with a driven gear 25. The front end of the conveying shaft 95 inside the clean water washing machine 2 rotates through the mounting plate 19 and is fixedly sleeved with a driving gear 26 that meshes with the driven gear 25.

[0028] When the PCB board is transported to the inside of the clean water washing machine 2 through the conveying mechanism 9, the No. 1 spring 75 is in an extended state, driving the movable block 74 and the telescopic rod 77 thereon to move in the direction away from the fixing ring 72, and at the same time driving the arc block 73 to move in the direction away from the fixing 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 to convey, it drives the driving gear 26 to rotate, synchronously drives the driven gear 25 to rotate, and then drives the fixing ring 72 and the fixed sleeve 78 thereon to rotate, indirectly driving the flexible silicone wheel 76 to rotate, and utilizing the squeezing of the flexible silicone wheel 76 and the conveying wheel 96 to transport the PCB board. When the flexible silicone wheel 76 contacts the PCB board, the flexible silicone wheel 76 contracts, driving the arc block 73 and the telescopic rod 77 to contract, indirectly driving the No. 1 spring 75 to contract, realizing the adaptive contraction of the flexible silicone wheel 76, which is convenient for limiting and fixing PCB boards of different thicknesses, and is conducive to conveying PCB boards of different thicknesses.

[0029] See also Figure 2 、 Figure 6 、 Figure 7 and Figure 8The reciprocating cleaning mechanism 8 includes a number of No. 2 support plates 84 that are symmetrically and evenly fixedly connected to the two mounting plates 19 inside the clean water washing machine 2. A rotating assembly 83 is provided between the two No. 2 support plates 84 that are symmetrical in front and back. A reciprocating assembly 82 is provided on the rear side of the rotating assembly 83. A driving assembly 81 is commonly provided between the two reciprocating assemblies 82. The driving assembly 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 rotates together between the two bearing plates 813. A No. 1 worm gear 811 is fixedly sleeved on the middle part of the transmission rod 815. A number of No. 1 worm gears 812 that mesh with the No. 1 worm gear 811 are fixedly sleeved on the transmission shaft 98 inside the clean water washing machine 2. Cams 814 are fixedly sleeved on the top and bottom of the transmission rod 815. The rotating assembly 83 includes a No. 2 fixed rod 810 that is slidably connected to the No. 2 support plate 84. 32. A guide rod 831 is fixedly installed on the outside of the No. 2 fixed rod 832, and the guide rod 831 is slidably connected to the inside of the No. 2 support plate 84. A flushing roller 833 is fixedly installed between the two No. 2 fixed rods 832. A plurality of 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 rotating connection between the diversion pipe 834 and the rotating pipe 836 to effectively avoid water leakage. A rotating nozzle 837 is fixedly installed on the bottom of the rotating pipe 836, and a gear ring 838 is fixedly sleeved on the outside of the rotating pipe 836. A rack 835 meshing with the gear ring 838 is fixedly connected between the two mounting plates 19. Multiple flushing rollers 833 are fixedly connected to the water pump located inside the deionized water tank through a hose. The gear ring 838 and the rack 835 are made of polytetrafluoroethylene, which effectively avoids the corrosion of the gear ring 838 and the rack 835 by the acid.

[0030] See also Figure 2 、 Figure 6 、 Figure 7 and Figure 9 The reciprocating assembly 82 includes a plurality of limiting sleeves 821 uniformly fixedly mounted on the No. 2 support plate 84 located on the rear side, a No. 2 spring 822 is fixedly sleeved inside the limiting sleeve 821, and a fixing plate 823 is fixedly mounted on one end of the plurality of No. 2 springs 822 away from the No. 2 support plate 84, and the fixing plate 823 is fixedly mounted on the No. 2 fixing rod 832 on the rear side, and a limiting wheel 824 that cooperates with the cam 814 is fixedly mounted on the rear side of the fixing plate 823, and a No. 2 arc-shaped locking seat 825 for limiting and locking the No. 2 fixing rod 832 is fixedly mounted on the No. 2 support plate 84, and the No. 2 arc-shaped locking seat 825 and the No. 2 fixing rod 832 are connected by ball rolling.

[0031] When in use, after the PCB board is pickled, it is transported to the inside of the clean water washing machine 2 by the conveying mechanism 9. At this time, during the rotation of the transmission shaft 98 in the conveying mechanism 9, the No. 1 worm 812 is synchronously driven to rotate, and the No. 1 worm wheel 811 is driven to rotate, and the transmission rod 815 and the cam 814 thereon are synchronously driven to rotate. When the cam 814 rotates, the protruding part of the cam 814 contacts the limiting wheel 824, driving the fixed plate 823 and the No. 2 fixed rod 832 thereon to move forward, and synchronously compressing the No. 2 spring 822. When the protruding part of the cam 814 is away from the limiting wheel 824, under the action of the restoring force of the No. 2 spring 822, the fixed plate 823 and the No. 2 fixed rod 832 thereon are driven to move backward, and the washing roller 833 and the diverter pipe 834 thereon are driven to reciprocate back and forth, synchronously driving the rotating pipe 83 6 and the rotating nozzle 837 thereon reciprocate back and forth, and at the same time drive the gear ring 838 to reciprocate back and forth. While the gear ring 838 reciprocates back and forth, it engages with the rack 835, synchronously driving the gear ring 838 and the rotating tube 836 thereon to rotate back and forth, and at the same time driving the rotating nozzle 837 to rotate back and forth. At this time, the water pump inside the deionized water tank is started, and the water pump transports the deionized water stored in the water tank to the rinsing roller 833, and the deionized water is transported to the diversion pipe 834, and then sprayed out from the rotating nozzle 837, realizing the back and forth reciprocating flushing and rotation flushing of the deionized water, increasing the coverage area of ​​the flushing, and dynamic flushing, compared with the fixed nozzle flushing, reduces the cleaning blind area, and the complex water flow pattern generated by the rotation and reciprocating action increases the shear force on the stains, which helps to peel off and take away the pollutants, thereby improving the cleaning effect and cleaning efficiency.

[0032] See also Figure 1 、 Figure 3 and Figure 12 The cold air dryer 3 and the hot air dryer 4 are fixedly connected to a supporting plate on the rear side, and three suction fans 17 are evenly installed on the top of the supporting plate. A filter cartridge 13 is provided on the top of the air inlet end of the suction fan 17. The air outlet ends of the three suction fans 17 are respectively connected to the cold air dryer 3, the hot air dryer 4 and the turning mechanism 6 through pipes. The pickling machine 1, the clean water flushing machine 2 and the hot air dryer 4 are fixedly installed with columns 11 on the rear side, and a wiring harness box 12 is fixedly installed on the top of multiple columns 11. An electric control cabinet 16 is provided on the top of the clean water flushing machine 2.

[0033] During use, after the reciprocating rotating cleaning mechanism 8 cleans the PCB board, the conveying mechanism 9 continues to convey the PCB board and conveys it to the cold air dryer 3. At this time, the suction fan 17 is started to convey the external cold air to the cold air dryer 3 through the suction fan 17, and the cleaned PCB board is blown dry 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 conveys the filtered air to the hot air dryer 4, and the hot air dryer 4 is used to dry the PCB board with hot air. After drying, the conveying mechanism 9 continues to convey the PCB board to the turning mechanism 6.

[0034] See also Figure 3 and Figure 11 The flipping mechanism 6 includes a servo motor 61 fixedly installed on the rear side of the flipping box 5. The output end of the servo motor 61 rotates and passes through the rear wall of the flipping box 5 and is fixedly connected to a central shaft 62. The central shaft 62 is rotatably installed in the flipping box 5. A rotating cylinder 66 is fixedly sleeved on the outside of the central shaft 62. The rotating cylinder 66 is a hollow structure. Roller conveyors 14 are provided on the top of the left and right sides of the flipping box 5. The roller conveyors 14 are conventional existing technologies and can be selected according to usage requirements. Several guide rollers 24 are rotatably installed on both sides of the top of the flipping box 5.

[0035] See also Figure 11 and Figure 12 A number of No. 3 fixing rods 64 are evenly fixedly installed on the middle part of the inner wall of the rotating cylinder 66, and a plurality of No. 3 fixing rods 64 are fixedly installed on the central rotating shaft 62. A rotating disk 67 is rotatably connected to the rear side of the rotating cylinder 66. A number of connecting pipes 69 are fixedly connected to the rotating disk 67. The rear sides of the plurality of connecting pipes 69 are fixedly passed through the rear side of the turnover box 5 and are fixedly 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 end of the suction fan 17. A number of flip rods 63 are evenly fixedly installed on the outside of the rotating cylinder 66, and an air outlet 65 is opened on the outside of the rotating cylinder 66 between two adjacent flip rods 63.

[0036] During use, after the dried PCB board is conveyed to the roller conveyor 14, it then enters the gap between the adjacent flip rods 63 through the guide rollers 24. At this time, driven by the output end of the No. 1 servo motor 61, the central rotating shaft 62 and the No. 3 fixed rod 64 thereon are driven to rotate synchronously, and at the same time, the rotating cylinder 66 is driven to rotate, and the flip rod 63 is driven to rotate synchronously. The flip rod 63 is used to realize the automatic flipping of the PCB board. At the same time, the suction fan 17 conveys the filtered air to the annular tube through the air supply pipe 68, and then conveys it to the rotating cylinder 66 through the connecting pipe 69. The filtered air is then ejected from the blowing port 65 and blown onto the PCB board. The blown air is used to blow and clean the surface of the PCB board, thereby avoiding the situation where dust falls on the PCB surface when turning over, and at the same time has the effect of blowing and cooling the surface of the PCB board.

[0037] See also Figure 2 and Figure 4 The pickling machine 1 and the clean water flushing machine 2 are both provided with a filtering mechanism 10. The filtering 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. The bottom surface of the pickling machine 1 and the clean water flushing machine 2 is both provided with a collecting cover 101. A drain pipe 18 is fixedly installed at the bottom of the collecting cover 101. When in use, the wastewater from pickling and flushing falls onto the filter plate 102, and the filter plate 102 is used to filter the wastewater from pickling and flushing and the deionized water for flushing. The filtered wastewater is collected by the collecting cover 101 and then discharged into the post-processing tank through the drain pipe 18 for treatment.

[0038] It should be noted that when using this PCB board copper plating cleaning machine, the water pump in the pickling tank is first started, and the water pump conveys the pickling liquid to the pickling spray roller 15, and then sprays it from the fixed nozzle 21. Then, the water pump inside the deionized water tank is started, and the water pump conveys the deionized water stored in the water tank to the rinsing roller 833. The deionized water is conveyed to the diversion pipe 834 and then sprayed from the rotating nozzle 837. Then, the PCB board to be cleaned is placed on the top of the conveying wheel 96 on the U-shaped plate 97. At this time, the No. 2 servo motor 91 is started, and the output end of the No. 2 servo motor 91 drives the input shaft of the gear box 921 to rotate, and at the same time drives the gear The output shaft of the box 921 and the fixed shaft 922 thereon rotate, synchronously driving the active bevel gear 923 and the driven bevel gear 924 to rotate, and at the same time driving the transmission shaft 98 and the multiple No. 2 worm gears 94 thereon to rotate, synchronously driving the No. 2 worm gear 93 and the conveying shaft 95 thereon to rotate, and then simultaneously driving the conveying wheel 96 to rotate, and the conveying wheel 96 is used to convey the PCB board from right to left, and convey it to the pickling machine 1, and the pickling liquid sprayed by the pickling spray roller 15 is used to rinse the PCB board. After the pickling is completed, as the conveying mechanism 9 continues to convey, it is conveyed to the clean water rinser 2, and the reciprocating rotating cleaning mechanism 8 is used to simultaneously clean both sides of the PCB board. The complex and rotating flushing increases the coverage area of ​​the flushing, and the dynamic flushing reduces the cleaning blind area compared to the fixed nozzle flushing. The complex water flow pattern generated by the rotation and reciprocating action increases the shear force on the stains, which helps to peel off and take away the pollutants, thereby improving the cleaning effect and cleaning efficiency. After the flushing is completed, the PCB board is transported to the cold air dryer 3 for cold air drying, and the hot air dryer 4 is used to dry the PCB board with hot air. After the drying is completed, it is transported to the roller conveyor 14, and then enters the gap between the adjacent flip rods 63 through the guide roller 24. At this time, the central shaft is driven by the output end of the No. 1 servo motor 61. 62 and the third fixed rod 64 thereon rotate synchronously, and at the same time drive the rotating cylinder 66 to rotate, and synchronously drive the flip rod 63 to rotate, and the flip rod 63 is used to realize the automatic flipping of the PCB board. While flipping, the suction fan 17 delivers the filtered air to the annular tube through the air supply pipe 68, and then delivers it to the rotating cylinder 66 through the connecting pipe 69. Then the filtered air is ejected from the blowing port 65, and the ejected air is blown onto the PCB board. The blown air is used to blow and clean the surface of the PCB board, thereby avoiding the situation where dust falls on the PCB surface when flipping, and at the same time has the effect of blowing and cooling the surface of the PCB board.

[0039] The above-described embodiments merely illustrate several implementations of the present invention. 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 a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A PCB board post-copper plating cleaning machine, comprising a pickling machine (1), characterized in that: The pickling machine (1) is provided with a clean water washing machine (2) on the left side, a cold air drying machine (3) is provided on the left side of the clean water washing machine (2), a hot air drying machine (4) is provided on the left side of the cold air drying machine (3), and a turning box (5) is provided on the left side of the hot air drying machine (4); the pickling machine (1), the clean water washing machine (2), the cold air drying machine (3) and the hot air drying machine (4) are provided with a conveying mechanism (9) for conveying PCB boards; a plurality of pickling spray rollers (15) are provided symmetrically in the upper and lower parts of the pickling machine (1); and an adaptive pressing wheel (7) and a reciprocating rotating cleaning mechanism (8) are provided in the clean water washing machine (2); Two mounting plates (19) are commonly provided inside the pickling machine (1), the clean water washing machine (2), the cold air drying machine (3) and the hot air drying machine (4); the conveying mechanism (9) comprises a U-shaped plate (97) fixedly mounted on the right side of the pickling machine (1); a plurality of conveying shafts (95) are rotatably passed through the U-shaped plate (97) and the mounting plate (19); a plurality of conveying wheels (96) for supporting and conveying PCB boards are sleeved and fixed on each conveying shaft (95); a transmission shaft (98) is rotatably mounted on the U-shaped plate (97) and the mounting plate (19); The reciprocating rotary cleaning mechanism (8) comprises a plurality of No. 2 support plates (84) fixedly connected to two mounting plates (19); a rotating assembly (83) is arranged between two No. 2 support plates (84) that are symmetrical in front and back; a reciprocating assembly (82) is arranged at the rear side of the rotating assembly (83); and a driving assembly (81) is arranged between the two reciprocating assemblies (82).

2. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: The cold air dryer (3) and the hot air dryer (4) are fixedly connected to a supporting plate at the rear side, and a suction fan (17) is installed on the top of the supporting plate. A filter cartridge (13) is provided on the top of the air inlet end of the suction fan (17), and the air outlet end of the suction fan (17) is connected to the cold air dryer (3), the hot air dryer (4) and the turning mechanism (6) through pipelines. The pickling machine (1), the clean water flushing machine (2) and the hot air dryer (4) are all fixedly installed with a column (11) at the rear side, a wiring harness box (12) is fixedly installed on the top of the column (11), and an electric control cabinet (16) is provided on the top of the clean water flushing machine (2).

3. The PCB cleaning machine after copper deposition according to claim 2, characterized in that: The flipping mechanism (6) comprises a servo motor (61) fixedly mounted on the rear side of the flipping box (5); an output end of the 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 mounted in 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 tops of both left and right sides of the flipping box (5); and a plurality of guide rollers (24) are rotatably mounted on both left and right sides of the top of the flipping box (5).

4. The PCB cleaning machine after copper deposition according to claim 3, characterized in that: The inner wall of the rotating cylinder (66) is provided with a plurality of No. 3 fixed rods (64), which are fixedly mounted 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 a plurality of connecting pipes (69). The rear sides of the plurality of connecting pipes (69) are fixedly connected to the rear side of the turnover box (5) and are 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 end of the suction fan (17). The outside of the rotating cylinder (66) is evenly fixedly provided with a plurality of turning rods (63), and an air blowing port (65) is provided between two adjacent turning rods (63) on the outside of the rotating cylinder (66).

5. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: The rear ends of the plurality of conveying shafts (95) are all fixedly sleeved with a No. 2 worm gear (93); a gear transmission assembly (92) is provided at the rear side of the pickling machine (1); a No. 2 servo motor (91) is provided at the top of the gear transmission assembly (92); the gear transmission assembly (92) comprises a gear box (921) fixedly connected to the rear side of the pickling machine (1); the output end of the No. 2 servo motor (91) is fixedly connected to the input end of the gear box (921); the output shaft of the gear box (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); the outer portion of the transmission shaft (98) is evenly fixedly sleeved with a plurality of No. 2 worms (94) meshing with the No. 2 worm gear (93); and the middle portion of the transmission shaft (98) is fixedly sleeved with a driven bevel gear (924) meshing with the driving bevel gear (923).

6. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: A plurality of No. 1 support plates (22) are fixedly mounted on the top and bottom of 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 in front and back, a pickling spray roller (15) is fixedly mounted between the two No. 1 fixing rods (20), a plurality of fixed nozzles (21) are evenly mounted on 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 mounted on the No. 1 support plate (22), and the No. 1 arc-shaped locking seat (23) and the No. 1 fixing rod (20) are connected by a ball rolling connection.

7. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: The driving assembly (81) includes two bearing plates (813) mounted on the mounting plate (19) at the rear side, a transmission rod (815) is rotatably passed through the two bearing plates (813), a No. 1 worm gear (811) is fixedly sleeved on the middle portion of the transmission rod (815), a plurality of No. 1 worm gears (812) meshing with the No. 1 worm gear (811) are fixedly sleeved on the transmission shaft (98) located inside the clean water flushing machine (2), a cam (814) is fixedly sleeved on the top and bottom of the transmission rod (815), and the rotating assembly (83) includes a No. 2 fixed rod (832) slidably connected to the No. 2 support plate (84), and the No. 2 fixed rod A guide rod (831) is fixedly installed on the outside of (832), and the guide rod (831) is slidably connected to the inside of the second support plate (84). A flushing roller (833) is fixedly installed between the two second fixed rods (832). The bottom of the flushing roller (833) is fixedly connected to a plurality of diversion pipes (834). A rotating pipe (836) is rotatably installed on the bottom of the diversion pipe (834). A rotating nozzle (837) is fixedly installed on the bottom of the rotating pipe (836). A gear ring (838) is fixedly sleeved on the outside of the rotating pipe (836). A rack (835) meshing with the gear ring (838) is fixedly connected between the two mounting plates (19).

8. The PCB cleaning machine after copper deposition according to claim 7, characterized in that: The reciprocating assembly (82) includes a plurality of limiting sleeves (821) mounted on a No. 2 support plate (84) located at the rear side, a No. 2 spring (822) is fixedly sleeved inside the limiting sleeve (821), a fixing plate (823) is fixedly mounted on one end of the plurality of No. 2 springs (822) away from the No. 2 support plate (84), the fixing plate (823) is fixedly mounted on the No. 2 fixed rod (832) at the rear side, a limiting wheel (824) matched with the cam (814) is fixedly mounted on the rear side of the fixing plate (823), a No. 2 arc-shaped locking seat (825) for limiting and locking the No. 2 fixed rod (832) is fixedly mounted on the No. 2 support plate (84), and the No. 2 arc-shaped locking seat (825) and the No. 2 fixed rod (832) are connected by a ball rolling connection.

9. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: The adaptive pressing wheel (7) comprises a plurality of rotating rods (71) rotatably mounted between two mounting plates (19), a plurality of fixed rings (72) corresponding to the conveying wheel (96) are fixedly sleeved on the rotating rods (71), a plurality of fixed sleeves (78) are fixedly mounted on the outside of the fixed rings (72), a movable block (74) is slidably connected to the inside of the fixed sleeves (78), a telescopic rod (77) is fixedly mounted at the center of the movable block (74), and the telescopic rod (77) slides through the end of the fixed sleeve (78) and is fixedly mounted with an arc block (73), The outer sides of the arc blocks (73) are commonly sleeved with a flexible silicone wheel (76), and a plurality of telescopic sections are evenly fixedly mounted on the flexible silicone wheel (76). One side of the movable block (74) is fixedly connected to one end of a No. 1 spring (75), and the other end of the No. 1 spring (75) is fixedly connected to the inner wall of a fixed sleeve (78). The front end of the rotating rod (71) rotates through the mounting plate (19) and is fixedly sleeved with a driven gear (25). The front end of the conveying shaft (95) rotates through the mounting plate (19) and is fixedly sleeved with a driving gear (26) meshing with the driven gear (25).

10. The PCB cleaning machine after copper deposition according to claim 1, characterized in that: The pickling machine (1) and the clean water washing machine (2) are both provided with a filtering mechanism (10), the filtering mechanism (10) comprising a side plate (104) fixedly connected to a mounting plate (19), a plug-in slide rail (103) fixedly mounted on the bottom of the side plate (104), a filter plate (102) being slidably plugged between two adjacent plug-in slide rails (103), a collecting cover (101) being provided on the bottom surface of the inside of the pickling machine (1) and the clean water washing machine (2), a drain pipe (18) being fixedly mounted on the bottom of the collecting cover (101).

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