Automatic cleaning device for ACF (anisotropic conductive film) of PCB (printed circuit board)

Abstract

The invention relates to the technical field of PCB processing, in particular to a PCB ACF automatic cleaning device which is characterized in that a device body comprises a feeding port and a discharging port, the feeding port and the discharging port are each provided with a conveying belt, and a removing liquid spraying mechanism, a plasma cleaning mechanism and a PCB positioning mechanism are arranged in the device body; a to-be-cleaned PCB is transferred between the removal liquid spraying mechanism and the plasma cleaning mechanism through a PCB positioning mechanism; the removal liquid spraying mechanism comprises a rotating base and a first supporting frame, a removal liquid spraying station, a non-woven fabric wiping station, an impurity adsorption station and a CCD camera detection station are arranged on the rotating base in a circumferential array mode, and a positioning mechanism is further installed at the output end of the removal liquid spraying station; the plasma cleaning mechanism comprises a plasma generator and an output pipeline. The plasma cleaning mechanism is fixedly connected with the device body through a second supporting frame. The PCB positioning mechanism comprises a base and a clamping mechanism, and a transfer plate is arranged on the base. The cleaning efficiency of the ACF on the PCB can be effectively improved, and meanwhile, the reinvestment yield of the PCB is improved.

Description

Technical Field

[0001] This application relates to the technical field of PCB board processing, and in particular to an automatic ACF cleaning device for PCB boards. Background Art

[0002] When performing rework on PCB boards in products of the LCD and OLED panel industries, the ACF on the PCB needs to be removed. Currently, there are two removal methods. One is the method of soaking in acetone and wiping with a lint-free cloth dipped in alcohol. The smell of acetone removal is strong, and long-term exposure to the smell of acetone causes high physical harm to personnel, and the rework yield is about 80%. The other is the method of soaking in ACF removal liquid and wiping with a lint-free cloth dipped in alcohol. The rework yield is about 75%.

[0003] The above ACF cleaning methods for PCB boards have high pollution and low rework yield, and rely on manual wiping, resulting in low efficiency. Therefore, an automatic cleaning device for PCB boards is urgently needed. Summary of the Invention

[0004] In order to overcome the problems existing in the prior art, this application provides an automatic ACF cleaning device for PCB boards.

[0005] An automatic ACF cleaning device for PCB boards provided by this application adopts the following technical solutions:

[0006] An automatic ACF cleaning device for PCB boards includes a device main body, which includes a feed inlet and a discharge outlet opened on both sides of the device main body. Conveyor belts are provided at both the feed inlet and the discharge outlet. A removal liquid spraying mechanism, a plasma cleaning mechanism, and a PCB board positioning mechanism are arranged inside the device main body. The PCB board to be cleaned is transported between the removal liquid spraying mechanism and the plasma cleaning mechanism through the PCB positioning mechanism; the removal liquid spraying mechanism includes a rotating seat and a first support frame for connecting the rotating seat and the device main body. Removal liquid spraying stations, non-woven fabric wiping stations, impurity adsorption stations, and CCD camera detection stations are circumferentially arranged on the rotating seat. A positioning mechanism is also installed at the output end of the removal liquid spraying station, and the positioning mechanism can limit the spraying range of the removal liquid; the plasma cleaning mechanism includes a plasma generator and an output pipeline of the plasma. The plasma cleaning mechanism is fixedly connected to the device main body through a second support frame. The plasma generator is located at the top of the second support frame, and the output pipeline communicates the plasma generator and the nozzle on the second support frame; the PCB board positioning mechanism includes a base on the device main body and a clamping mechanism on the base. A transfer plate for carrying the PCB board to be cleaned is slidably installed on the base along its length direction. The transfer plate is used to transfer the PCB board between the feed inlet and the discharge outlet. The clamping mechanism provided on the base is used for loading and unloading the PCB board on the transfer plate, and the bottom of the base is also driven to move on the device main body through an adjustment mechanism.

[0007] By adopting the above technical solution, the PCB board to be cleaned is fed in through the conveyor belt at the feeding port. When the PCB board on the conveyor belt is transferred to the transfer board, the clamping mechanism is used to clamp the PCB board entering the transfer board and then, under the action of the power mechanism, completely transfer the PCB board to the transfer board. The transfer board slides on the base, and at the same time, in cooperation with the adjustment mechanism to drive the base to move, the PCB board is sent under the rotating seat of the removing liquid spraying mechanism. The rotating seat of the removing liquid spraying mechanism rotates, and the PCB board passes through the removing liquid spraying station in sequence, where the positioning mechanism restricts the spraying range, the non-woven fabric wiping station, the impurity adsorption station, and the CCD camera detection station to complete the preliminary cleaning and detection; the PCB board that has completed the preliminary cleaning is then transferred to the plasma cleaning mechanism by the PCB board positioning mechanism. The plasma generator generates plasma, which is ejected through the output pipeline through the nozzle to deeply clean the PCB board; finally, the cleaned PCB board is transferred to the discharge port by the PCB board positioning mechanism, and the PCB board is transferred from the transfer board to the conveyor belt at the discharge port through the cooperation of the clamping mechanism and the power mechanism, and then sent out by the conveyor belt.

[0008] Preferably, a removing liquid tank and a negative pressure dust suction box are installed at the center of the rotating seat. The removing liquid tank body is connected to the removing liquid spray head at the removing liquid spraying station through a pipeline, and the removing liquid spray head is driven by a cylinder to move along the diameter direction of the rotating seat; the negative pressure dust suction box is connected to the adsorption spray head at the impurity adsorption station through a pipeline, and the adsorption spray head is driven by a cylinder to move along the diameter direction of the rotating seat; a wiping mechanism and a cylinder for driving the wiping mechanism to move along the diameter direction of the rotating seat are provided at the non-woven fabric wiping station. The wiping mechanism includes a winding roller and an unwinding roller, and the unwinding roller is located at the output end of the wiping mechanism; a detection camera for detecting the quality of the bonding area on the PCB board is installed at the CCD camera detection station.

[0009] Preferably, the positioning mechanism includes an adjustable limiting plate, which is installed at the output end of the cylinder around the removing liquid spray head. A plurality of groups of negative pressure adsorption fences and an elastic polymer layer between the adsorption fences are also installed on the outer side of the adjustable limiting plate, and an oxidation nano-coating is coated on the inner side of the adjustable limiting plate and the inner side of the elastic polymer layer. The negative pressure adsorption fence includes an array of adsorption pipelines, and the negative pressure adsorption fence is communicated with the negative pressure dust suction box through a pipeline.

[0010] By adopting the above technical solution, when the rotating base rotates, the PCB board to be cleaned enters each working station in sequence. When it reaches the removal liquid spraying station, the removal liquid tank transports the removal liquid to the nozzle through a pipeline. The cylinder drives the nozzle to move along the diameter direction of the rotating base to the upper part of the corresponding bonding area. At the same time, according to the size of the bonding area to be cleaned, the cylinders around the adjustable limiting plate push the limiting plate to extend, and cooperate with the elastic polymer layer between the adjustable limiting plates to frame the periphery of the bonding area. At the same time, the negative pressure adsorption fence on the adjustable limiting plate is connected to the negative pressure dust collection box through a pipeline to generate suction, sucking away the removal liquid sprayed outside the bonding area, further restricting the spraying range of the removal liquid. The oxidized nano-coating can also prevent the removal liquid from remaining on the inner walls of the adjustable limiting plate and the polymer layer. Then it enters the non-woven fabric wiping station, the cylinder drives the wiping mechanism to move along the diameter direction, the unwinding roller releases the non-woven fabric to wipe the PCB board, and after wiping, the used non-woven fabric is collected by the winding roller. Then it comes to the impurity adsorption station, the negative pressure dust collection box makes the adsorption nozzle generate suction through a pipeline, and the cylinder drives the adsorption nozzle to move to adsorb impurities. Finally, at the CCD camera detection station, the detection camera detects the quality of the bonding area of the PCB board. Through the coordinated operation of each working station, precise cleaning and quality detection of the PCB board are realized.

[0011] Preferably, the device body includes a base body and a cover body. Among them, an installation groove for accommodating the PCB board positioning mechanism is opened at the top of the base body, and the cover body adopts a structure combined with a metal frame and transparent glass, and the feeding port and the discharging port are located on both sides of the device body.

[0012] Preferably, the installation groove communicates with the conveyor belt groove at both ends of the feeding port and the discharging port, and a defective product collection cavity is opened at the bottom of the installation groove.

[0013] Preferably, an adjusting block is installed at the center of the bottom of the base. Among them, two sets of wire sleeves are vertically distributed in the adjusting block, and the wire sleeves are arranged up and down in a staggered manner. A lead screw driving component matched with the wire sleeves is arranged in the installation groove. The two ends of the lead screw driving component are slidably installed in the moving grooves on the inner side walls of the installation groove. The lead screw driving component includes a motor, the output end of the motor is installed with a lead screw, the other end of the lead screw is rotatably installed on a bearing seat, and both the motor and the bearing seat are slidably connected in the moving groove.

[0014] By adopting the above technical solution, the installation groove at the top of the seat body is used to accommodate the PCB board positioning mechanism. The conveyor belts on both sides of the feeding port and the discharging port send the PCB board into the installation groove. The two sets of staggered wire sleeves in the adjusting block at the bottom of the base cooperate with the lead screw driving assembly in the installation groove. The motor drives the lead screw to rotate, driving the adjusting block to move along the lead screw, so as to realize the position adjustment of the base in the installation groove and accurately control the transfer of the PCB board between each working station. When a defective product is detected, the PCB board positioning mechanism does not transfer the PCB board to the discharging port, but directly transfers it to the defective product collection cavity near the discharging port at the bottom of the installation groove through the action of the clamping structure and the power mechanism; and the cover body adopts a combined structure of a metal frame and transparent glass, which can not only protect the internal mechanism, but also facilitate observing the operation state of the device, ensuring the stable and orderly operation of the entire PCB board ACF automatic cleaning device.

[0015] Preferably, the surface height of the transfer board is the same as that of the conveyor belt, and the two ends of the transfer board are provided with arc-shaped structures that fit the ends of the conveyor belt. A rack is opened along the length direction of the bottom of the transfer board, and a number of driving gears meshing with the rack are provided at the top of the base, and the driving gears are synchronously driven by a motor.

[0016] Preferably, the clamping mechanisms are respectively arranged at the feeding end and the discharging end of the base. The clamping mechanisms are slidably installed in the limiting grooves on both sides of the surface of the base, and include sliders and clamping plates installed at the output ends of the cylinders in the sliders. The clamping plate at the feeding end of the base adopts a flat structure, and the clamping plate at the discharging end of the base adopts an L-shaped structure, and the opening of the L-shaped structure faces the discharging port. The clamping mechanism is driven by the power mechanism to complete the transfer of the PCB board from the feeding port to the transfer board and the transfer of the PCB board from the transfer board to the discharging port.

[0017] Preferably, the power mechanism includes an adjusting lead screw passing through the slider. A corresponding adjusting wire sleeve is opened in the slider, and a positioning block is provided at the center of the length direction of the limiting groove. The adjusting lead screw is rotatably connected in the positioning block, and the thread directions of the adjusting lead screws on both sides of the positioning block are opposite.

[0018] Preferably, impurity adsorption ports are also installed on both sides of the center in the length direction of the base. The impurity adsorption ports are connected to the vacuum cleaner in the device body through a dust suction pipeline.

[0019] By adopting the above technical solutions, the conveyor belt sends the PCB board to the feeding port. The clamping mechanism at the feeding end of the base uses a flat-structured clamping plate. Driven by the power mechanism, the slider slides along the limit groove close to the PCB board by rotating the adjusting screw rod. The air cylinder drives the clamping plate to clamp the PCB board, and then transfers it to the transfer plate under the drive of the power mechanism; the surface height of the transfer plate is the same as that of the conveyor belt, and the arc-shaped structures at both ends are attached to the ends of the conveyor belt, facilitating the smooth transition of the PCB board. The motor at the top of the base synchronously drives the driving gear to rotate, which meshes with the rack at the bottom of the transfer plate, driving the transfer plate to move along the length direction of the base; after the PCB board is cleaned, the L-shaped clamping plate at the discharging end of the base slides to the transfer plate under the action of the power mechanism, clamps the PCB board and transfers it to the conveyor belt at the discharging port for sending out. During the movement of the L-shaped clamping plate at the discharging end of the base towards the discharging port, since the thread directions on the adjusting screw rods on both sides of the positioning block are opposite, when the adjusting screw rod drives the L-shaped clamping plate towards the discharging port, the clamping plate with a flat structure at the other end is reset towards the discharging port under the action of the adjusting screw rod, facilitating the clamping of the next group of PCB boards and improving the transfer efficiency; during the transfer process, the impurity suction ports on both sides of the center in the length direction of the base are connected to the vacuum cleaner through the dust suction pipeline to timely suck the impurities generated during the transfer process, ensuring the cleanliness of the working environment and the cleaning effect of the PCB board.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. In the present application, through the coordinated operation of multiple mechanisms, efficient and precise cleaning is achieved. The removal liquid spraying mechanism cooperates with the positioning mechanism to accurately control the spraying range of the removal liquid, reducing waste and pollution. The negative pressure adsorption fence further adsorbs impurities, and the CCD camera detection station monitors the cleaning quality in real time; the plasma cleaning mechanism performs in-depth cleaning to ensure the cleaning effect.

[0022] 2. In the present application, the transfer plate of the PCB board positioning mechanism is seamlessly connected to the conveyor belt. The arc-shaped structure and the gear-rack transmission ensure the smooth transfer of the PCB board, and the different structural designs of the clamping mechanism achieve accurate loading and unloading; the base can move flexibly through the adjustment mechanism to adapt to PCB boards of different specifications.

[0023] 3. In the present application, by designing an observation cover structure on the device main body, the defective product collection cavity and the impurity suction port timely process unqualified products and impurities, effectively improving the cleaning efficiency and product quality, reducing the labor cost and error rate, and enhancing the applicability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of a PCB board ACF automatic cleaning device;

[0025] Figure 2It is a schematic structural diagram of the removal cover in a PCB board ACF automatic cleaning device;

[0026] Figure 3 It is a schematic structural diagram of the removal liquid spraying mechanism in a PCB board ACF automatic cleaning device;

[0027] Figure 4 It is a schematic structural diagram of the removal cover and the plasma cleaning mechanism in a PCB board ACF automatic cleaning device;

[0028] Figure 5 It is Figure 4 The enlarged view at position A in

[0029] Figure 6 It is Figure 5 The enlarged view at position B in

[0030] Figure 7 It is a schematic structural diagram of the other side of the removal cover and the plasma cleaning mechanism in a PCB board ACF automatic cleaning device.

[0031] Explanation of reference numerals: 1. Device main body; 11. Feeding port; 12. Discharging port; 13. Conveyor belt; 14. Base body; 141. Installation groove; 142. Conveyor belt groove; 143. Defective product collection cavity; 144. Moving groove; 15. Cover; 2. Removal liquid spraying mechanism; 21. Rotating seat; 211. First support frame; 212. Removal liquid tank; 213. Negative pressure dust suction box; 22. Removal liquid spraying station; 221. Removal liquid spray head; 23. Non-woven fabric wiping station; 231. Wiping mechanism; 232. Winding roller; 233. Unwinding roller; 24. Impurity adsorption station; 241. Adsorption spray head; 25. CCD camera detection station; 251. Detection camera; 26. Positioning mechanism; 261. Adjustable limit plate; 262. Adsorption fence; 2621. Adsorption pipeline; 263. Elastic polymer layer; 3. Plasma cleaning mechanism; 31. Plasma generator; 311. Second support frame; 32. Output pipeline; 4. PCB board positioning mechanism; 41. Base; 411. Adjusting block; 412. Lead screw drive assembly; 4121. Motor; 4122. Lead screw; 4123. Bearing seat; 413. Transfer plate; 414. Driving gear; 415. Impurity adsorption port; 416. Dust suction pipeline; 417. Limit groove; 42. Clamping mechanism; 421. Slide block; 422. Clamping plate; 43. Adjusting mechanism; 44. Power mechanism; 441. Adjusting lead screw. Detailed implementation manners

[0032] The following will Figures 1-7 make a further detailed description of the present application in conjunction with the attached

[0033] The embodiment of the present application discloses a PCB board ACF automatic cleaning device.

[0034] Reference Figures 1-7, a PCB board ACF automatic cleaning device, including a device main body 1, which includes a feed inlet 11 and a discharge outlet 12 opened on both sides of the device main body 1. Among them, conveyor belts 13 are provided at both the feed inlet 11 and the discharge outlet 12. A removal liquid spraying mechanism 2, a plasma cleaning mechanism 3 and a PCB board positioning mechanism 4 are arranged inside the device main body 1. The PCB board to be cleaned is transported between the removal liquid spraying mechanism 2 and the plasma cleaning mechanism 3 through the PCB positioning mechanism 26; The removal liquid spraying mechanism 2 includes a rotating seat 21 and a first support frame 211 for connecting the rotating seat 21 and the device main body 1. Removal liquid spraying stations 22, non-woven fabric wiping stations 23, impurity adsorption stations 24 and CCD camera detection stations 25 are circumferentially arrayed on the rotating seat 21. A positioning mechanism 26 is also installed at the output end of the removal liquid spraying station 22, and the positioning mechanism 26 can limit the spraying range of the removal liquid; The plasma cleaning mechanism 3 includes a plasma generator 31 and an output pipeline 32 of the plasma. The plasma cleaning mechanism 3 is fixedly connected to the device main body 1 through a second support frame 311. Among them, the plasma generator 31 is located at the top of the second support frame 311, and the output pipeline 32 communicates the plasma generator 31 and the nozzle on the second support frame 311; The PCB board positioning mechanism 4 includes a base 41 on the device main body 1 and a clamping mechanism 42 on the base 41. A transfer plate 413 for carrying the PCB board to be cleaned is slidably installed on the base 41 along its length direction. The transfer plate 413 is used to transfer the PCB board between the feed inlet 11 and the discharge outlet 12. Among them, the clamping mechanism 42 provided on the base 41 is used for loading and unloading the PCB board on the transfer plate 413, and the bottom of the base 41 is also driven by an adjustment mechanism 43 to move on the device main body 1. The PCB board to be cleaned is sent in through the conveyor belt 13 at the feed inlet 11. When the PCB board on the conveyor belt 13 is transferred to the transfer plate 413, the clamping mechanism 42 is used to clamp the PCB board entering the transfer plate 413 and then completely transfer the PCB board to the transfer plate 413 under the action of the power mechanism 44. The transfer plate 413 slides on the base 41, and at the same time, it cooperates with the adjustment mechanism 43 to drive the base 41 to move to send the PCB board under the rotating seat 21 of the removal liquid spraying mechanism 2. The rotating seat 21 of the removal liquid spraying mechanism 2 rotates, and the PCB board sequentially passes through the removal liquid spraying station 22, where the positioning mechanism 26 limits the spraying range, the non-woven fabric wiping station 23, the impurity adsorption station 24 and the CCD camera detection station 25 to complete the preliminary cleaning and detection; The PCB board that has completed the preliminary cleaning is then transported to the plasma cleaning mechanism 3 by the PCB board positioning mechanism 4. The plasma generator 31 generates plasma, and the plasma is ejected through the output pipeline 32 through the nozzle to deeply clean the PCB board; Finally, the cleaned PCB board is transported to the discharge outlet 12 by the PCB board positioning mechanism 4, and the PCB board is transferred from the transfer plate 413 to the conveyor belt 13 at the discharge outlet 12 through the cooperation of the clamping mechanism 42 and the power mechanism 44, and then sent out by the conveyor belt 13.

[0035] Referring to Figures 1-7 , a cleaning liquid tank 212 and a negative pressure dust suction box 213 are installed at the center of the rotating base 21. The cleaning liquid tank 212 is connected to a cleaning liquid nozzle 221 on the cleaning liquid spraying station 22 through a pipeline, and the cleaning liquid nozzle 221 is driven by a cylinder to move along the diameter direction of the rotating base 21; the negative pressure dust suction box 213 is connected to an adsorption nozzle 241 on the impurity adsorption station 24 through a pipeline, and the adsorption nozzle 241 is driven by a cylinder to move along the diameter direction of the rotating base 21; a wiping mechanism 231 and a cylinder for driving the wiping mechanism 231 to move along the diameter direction of the rotating base 21 are provided on the non-woven fabric wiping station 23. The wiping mechanism 231 includes a winding roller 232 and an unwinding roller 233, and the unwinding roller 233 is located at the output end of the wiping mechanism 231; a detection camera 251 for detecting the quality of the bonding area on the PCB board is installed on the CCD camera detection station 25. The positioning mechanism 26 includes an adjustable limit plate 261. The adjustable limit plate 261 is installed at the output end of the cylinders around the cleaning liquid nozzle 221. A plurality of groups of negative pressure adsorption fences 262 and an elastic polymer layer 263 between the adsorption fences 262 are further installed on the outer side of the adjustable limit plate 261. An oxidation nano-coating is coated on the inner side of the adjustable limit plate 261 and the inner wall of the elastic polymer layer 263. The negative pressure adsorption fence 262 includes an array of adsorption pipes 2621, and the negative pressure adsorption fence 262 is communicated with the negative pressure dust suction box 213 through a pipeline. When the rotating base 21 rotates, the PCB board to be cleaned enters each station in turn, reaches the cleaning liquid spraying station 22. The cleaning liquid tank 212 transports the cleaning liquid to the nozzle through a pipeline. The cylinder drives the nozzle to move above the corresponding bonding area along the diameter direction of the rotating base 21. At the same time, according to the size of the bonding area to be cleaned, the cylinders around the adjustable limit plate 261 are pushed to extend the limit plate, and the elastic polymer layer 263 between the adjustable limit plates 261 is used to frame the periphery of the bonding area. At the same time, the negative pressure adsorption fence 262 on the adjustable limit plate 261 is communicated with the negative pressure dust suction box 213 through a pipeline to generate suction, sucking away the part of the cleaning liquid sprayed out of the bonding area, further restricting the spraying range of the cleaning liquid. The oxidation nano-coating can also prevent the cleaning liquid from remaining on the inner walls of the adjustable limit plate 261 and the polymer layer; then it enters the non-woven fabric wiping station 23. The cylinder drives the wiping mechanism 231 to move along the diameter direction. The unwinding roller 233 releases the non-woven fabric to wipe the PCB board, and after wiping, the used non-woven fabric is collected by the winding roller 232; then it reaches the impurity adsorption station 24. The negative pressure dust suction box 213 makes the adsorption nozzle 241 generate suction through a pipeline, and the cylinder drives the adsorption nozzle 241 to move to adsorb impurities; finally, at the CCD camera detection station 25, the detection camera 251 detects the quality of the bonding area of the PCB board. Through the coordinated operation of each station, precise cleaning and quality detection of the PCB board are realized.

[0036] Referring to Figures 1-7, the device main body 1 includes a base body 14 and a cover body 15. The top of the base body 14 is provided with an installation groove 141 for accommodating the PCB board positioning mechanism 4. The cover body 15 adopts a structure combined with a metal frame and transparent glass. The feeding port 11 and the discharging port 12 are located on both sides of the device main body 1. The installation groove 141 communicates with the conveyor belt groove 142 at both ends of the feeding port 11 and the discharging port 12. A defective product collection cavity 143 is opened at the bottom of the installation groove 141. A regulating block 411 is installed at the center of the bottom of the base 41. Two sets of wire sleeves are vertically distributed in the regulating block 411, and the wire sleeves are arranged staggered up and down. A lead screw driving assembly 412 that cooperates with the wire sleeves respectively is arranged in the installation groove 141. The two ends of the lead screw driving assembly 412 are slidably installed in the moving grooves 144 on the inner side walls of the installation groove 141. The lead screw driving assembly 412 includes a motor 4121. The output end of the motor 4121 is installed with a lead screw 4122. The other end of the lead screw 4122 is rotatably installed on a bearing seat 4123. Both the motor 4121 and the bearing seat 4123 are slidably connected in the moving groove 144. The installation groove 141 at the top of the base body 14 is used to accommodate the PCB board positioning mechanism 4. The conveyor belts 13 on both sides of the feeding port 11 and the discharging port 12 send the PCB board into the installation groove 141. The two sets of staggered wire sleeves in the regulating block 411 at the bottom of the base 41 cooperate with the lead screw driving assembly 412 in the installation groove 141. The motor 4121 drives the lead screw 4122 to rotate, driving the regulating block 411 to move along the lead screw 4122, so as to realize the position adjustment of the base 41 in the installation groove 141 and accurately control the transfer of the PCB board between each working station. When a defective product is detected, the PCB board positioning mechanism 4 does not transfer the PCB board to the discharging port 12, but directly transfers it to the defective product collection cavity 143 near the discharging port 12 at the bottom of the installation groove 141 through the action of the clamping structure and the power mechanism 44; and the cover body 15 adopts a structure combined with a metal frame and transparent glass, which can not only protect the internal mechanism, but also facilitate observing the operation state of the device, ensuring the stable and orderly operation of the entire PCB board ACF automatic cleaning device.

[0037] Refer to Figures 1-7, the surface height of the transfer plate 413 is the same as that of the conveyor belt 13, and arc-shaped structures that fit the ends of the conveyor belt 13 are provided at both ends of the transfer plate 413. A rack is provided at the bottom of the transfer plate 413 along its length direction. A number of driving gears 414 that mesh and drive with the rack are provided at the top of the base 41, and the driving gears 414 are synchronously driven by a motor 4121. The clamping mechanisms 42 are respectively arranged at the feeding end and the discharging end of the base 41. The clamping mechanisms 42 are slidably installed in the limiting grooves 417 on both sides of the surface of the base 41, and include sliders 421 and clamping plates 422 at the output ends of cylinders installed in the sliders 421. Among them, the clamping plate 422 at the feeding end of the base 41 adopts a planar structure, and the clamping plate 422 at the discharging end of the base 41 adopts an L-shaped structure, and the opening of the L-shaped structure faces the discharging port 12. The clamping mechanisms 42 are driven by a power mechanism 44 to complete the transfer of the PCB board from the feeding port 11 to the transfer plate 413 and the transfer of the PCB board from the transfer plate 413 to the discharging port 12. The power mechanism 44 includes an adjusting screw rod 441 that penetrates the slider 421. A corresponding adjusting screw sleeve is provided in the slider 421, and a positioning block is provided at the center of the length direction of the limiting groove 417. The adjusting screw rod 441 is rotatably connected in the positioning block, and the thread directions of the adjusting screw rod 441 on both sides of the positioning block are opposite. Impurity adsorption ports 415 are also installed on both sides of the center of the length direction of the base 41. The impurity adsorption ports 415 are connected to a vacuum cleaner in the device main body 1 through a dust suction pipe 416.The conveyor belt 13 sends the PCB board to the feeding port 11. The clamping mechanism 42 at the feeding end of the base 41 uses a flat structure clamping plate 422. Driven by the power mechanism 44, the adjusting screw rod 441 rotates to drive the slider 421 to slide along the limiting groove 417 close to the PCB board. The air cylinder drives the clamping plate 422 to clamp the PCB board, and then it is transported to the transfer plate 413 under the drive of the power mechanism 44. The surface height of the transfer plate 413 is the same as that of the conveyor belt 13, and the arc-shaped structures at both ends are attached to the ends of the conveyor belt 13, facilitating the smooth transition of the PCB board. The motor 4121 at the top of the base 41 synchronously drives the driving gear 414 to rotate, which meshes with the rack at the bottom of the transfer plate 413, driving the transfer plate 413 to move along the length direction of the base 41. After the PCB board is cleaned, the L-shaped structure clamping plate 422 at the discharging end of the base 41 slides to the transfer plate 413 under the action of the power mechanism 44, clamps the PCB board and transports it to the discharging port 12 to be sent out by the conveyor belt 13. During the movement of the L-shaped structure clamping plate 422 at the discharging end of the base 41 towards the discharging port 12, since the thread directions on the adjusting screw rods 441 on both sides of the positioning block are opposite, when the adjusting screw rod 441 drives the L-shaped structure clamping plate 422 to move towards the discharging port 12, the clamping plate 422 with a flat structure at the other end is reset towards the discharging port 12 under the action of the adjusting screw rod 441, facilitating the clamping of the next group of PCB boards and improving the transfer efficiency. During the transfer process, the impurity suction ports 415 on both sides of the center in the length direction of the base 41 are connected to a vacuum cleaner through the dust suction pipeline 416 to timely suck the impurities generated during the transfer process, ensuring the cleanliness of the working environment and the cleaning effect of the PCB board.

[0038] Working principle: When the ACF automatic cleaning device for PCB boards works, the PCB board to be cleaned is sent into the device main body 1 by the conveyor belt 13 at the feeding port 11. The clamping mechanism 42 at the feeding end of the base 41 drives the slider 421 to slide in the limiting groove 417 close to the PCB board through the rotation of the adjusting screw rod 441 in the power mechanism 44. The air cylinder controls the clamping plate 422 to clamp the PCB board and then transports it to the transfer plate 413. The surface height of the transfer plate 413 is the same as that of the conveyor belt 13, and the arc-shaped structures at both ends ensure the smooth transition of the PCB board. The driving gear 414 at the top of the base 41 meshes with the rack at the bottom of the transfer plate 413 under the drive of the motor 4121, driving the transfer plate 413 to slide along the base 41 to the lower part of the removing liquid spraying mechanism 2 and at the same time cooperating with the adjusting mechanism 43 to drive the base 41 to move to send the PCB board to the lower part of the rotating seat 21 of the removing liquid spraying mechanism 2. The rotating seat 21 of the removing liquid spraying mechanism 2 rotates, and the PCB board successively passes through the removing liquid spraying station 22, where the positioning mechanism 26 restricts the spraying range, the non-woven fabric wiping station 23, the impurity suction station 24 and the CCD camera detection station 25 to complete the preliminary cleaning and detection.

[0039] If a defective product is detected, the PCB board positioning mechanism 4 will transfer it to the defective product collection chamber 143 at the bottom of the installation groove 141; the qualified PCB boards will be continuously transported by the transfer board 413. The motor 4121 of the lead screw drive assembly 412 in the adjustment mechanism 43 drives the lead screw 4122 to rotate, which cooperates with the lead screw sleeve in the adjustment block 411 at the bottom of the base 41, so that the base 41 moves in the installation groove 141 and transfers the PCB board to the plasma cleaning mechanism 3. The plasma generator 31 is located at the top of the second support frame 311, and the generated plasma is ejected from the nozzle through the output pipeline 32 to deeply clean the PCB board.

[0040] After the cleaning is completed, the L-shaped clamping plate 422 at the discharge end of the base 41 slides to the transfer board 413 under the action of the power mechanism 44 to clamp the PCB board, and then transfers it to the conveyor belt 13 at the discharge port 12 for delivery. During the transfer process, the impurity suction ports 415 on both sides of the center in the length direction of the base 41 are connected to the vacuum cleaner through the suction pipeline 416 to timely suck out the impurities generated during the transfer, ensuring the cleaning effect and the cleanliness of the working environment.

[0041] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic cleaning device for PCB board ACF, characterized in that: Comprising A device main body (1), including a feed inlet (11) and a discharge outlet (12) opened on both sides of the device main body (1), wherein conveyor belts (13) are provided at both the feed inlet (11) and the discharge outlet (12). A liquid removal spraying mechanism (2), a plasma cleaning mechanism (3) and a PCB board positioning mechanism (4) are arranged inside the device main body (1). The PCB board to be cleaned is transported between the liquid removal spraying mechanism (2) and the plasma cleaning mechanism (3) through a PCB positioning mechanism (26); The liquid removal spraying mechanism (2) includes a rotating base (21) and a first support frame (211) for connecting the rotating base (21) and the device main body (1). Liquid removal spraying stations (22), non-woven fabric wiping stations (23), impurity adsorption stations (24) and CCD camera detection stations (25) are circumferentially arranged on the rotating base (21). A positioning mechanism (26) is further installed at the output end of the liquid removal spraying station (22), and the positioning mechanism (26) can limit the spraying range of the liquid removal; The plasma cleaning mechanism (3) includes a plasma generator (31) and an output pipeline (32) of the plasma. The plasma cleaning mechanism (3) is fixedly connected to the device main body (1) through a second support frame (311). Among them, the plasma generator (31) is located at the top of the second support frame (311), and the output pipeline (32) communicates the plasma generator (31) and the nozzle on the second support frame (311); The PCB board positioning mechanism (4) includes a base (41) on the device main body (1) and a clamping mechanism (42) on the base (41). A transfer plate (413) for carrying the PCB board to be cleaned is slidably installed on the base (41) along its length direction. The transfer plate (413) is used to transfer the PCB board between the feed inlet (11) and the discharge outlet (12). Among them, the clamping mechanism (42) provided on the base (41) is used for loading and unloading the PCB board on the transfer plate (413), and the bottom of the base (41) is also driven to move on the device main body (1) through an adjustment mechanism (43).

2. The ACF automatic cleaning device for a PCB board according to claim 1, wherein: A removal liquid tank (212) and a negative pressure dust suction box (213) are installed at the center of the rotating base (21). The removal liquid tank (212) is connected to a removal liquid spray head (221) at the removal liquid spraying station (22) through a pipeline, and the removal liquid spray head (221) is driven by a cylinder to move along the diameter direction of the rotating base (21). The negative pressure dust suction box (213) is connected to an adsorption spray head (241) at the impurity adsorption station (24) through a pipeline, and the adsorption spray head (241) is driven by a cylinder to move along the diameter direction of the rotating base (21). A wiping mechanism (231) and a cylinder for driving the wiping mechanism (231) to move along the diameter direction of the rotating base (21) are provided at the non-woven fabric wiping station (23). The wiping mechanism (231) includes a winding roller (232) and an unwinding roller (233), and the unwinding roller (233) is located at the output end of the wiping mechanism (231). A detection camera (251) for detecting the quality of the bonding area on the PCB board is installed at the CCD camera detection station (25).

3. The ACF automatic cleaning device for a PCB board according to claim 2, wherein: The positioning mechanism (26) includes an adjustable limit plate (261). The adjustable limit plate (261) is installed at the output end of the cylinders around the removal liquid spray head (221). A plurality of groups of negative pressure adsorption fences (262) and an elastic polymer layer (263) between the adsorption fences (262) are further installed on the outer side of the adjustable limit plate (261). An oxidation nano-coating is coated on the inner side of the adjustable limit plate (261) and the inner side of the elastic polymer layer (263). The negative pressure adsorption fence (262) includes an array of adsorption pipes (2621), and the negative pressure adsorption fence (262) is communicated with the negative pressure dust suction box (213) through a pipeline.

4. The ACF automatic cleaning device for a PCB board according to claim 1, wherein: The device main body (1) includes a base body (14) and a cover body (15). An installation groove (141) for accommodating the PCB board positioning mechanism (4) is opened at the top of the base body (14). The cover body (15) adopts a structure combined with a metal frame and transparent glass. The feeding port (11) and the discharging port (12) are located on both sides of the device main body (1).

5. The ACF automatic cleaning device for a PCB board according to claim 4, wherein: The installation groove (141) is communicated with a conveyor belt groove (142) at both ends of the feeding port (11) and the discharging port (12). A defective product collection cavity (143) is opened at the bottom of the installation groove (141).

6. The ACF automatic cleaning device for a PCB board according to claim 5, characterized in that: An adjusting block (411) is installed at the center of the bottom of the base (41). Two sets of wire sleeves are vertically distributed in the adjusting block (411), and the wire sleeves are arranged in a staggered manner up and down. A lead screw driving assembly (412) respectively matched with the wire sleeves is provided in the installation groove (141). The two ends of the lead screw driving assembly (412) are slidably installed in moving grooves (144) on the inner side walls of the installation groove (141). The lead screw driving assembly (412) includes a motor (4121). A lead screw (4122) is installed at the output end of the motor (4121). The other end of the lead screw (4122) is rotatably installed on a bearing seat (4123). Both the motor (4121) and the bearing seat (4123) are slidably connected in the moving groove (144).

7. The ACF automatic cleaning device for a PCB board according to claim 1, wherein: The surface height of the transfer plate (413) is the same as that of the conveyor belt (13), and arc-shaped structures that fit the ends of the conveyor belt (13) are provided at both ends of the transfer plate (413). A rack is provided at the bottom of the transfer plate (413) along its length direction. A number of driving gears (414) that mesh and drive with the rack are provided at the top of the base (41), and the driving gears (414) are synchronously driven by a motor (4121).

8. An automatic ACF cleaning device for a PCB board according to claim 7, characterized in that: The clamping mechanisms (42) are respectively arranged at the feeding end and the discharging end of the base (41). The clamping mechanisms (42) are slidably installed in the limiting grooves (417) on both sides of the surface of the base (41), and include sliders (421) and clamping plates (422) at the output ends of cylinders installed in the sliders (421). The clamping plate (422) at the feeding end of the base (41) adopts a planar structure, the clamping plate (422) at the discharging end of the base (41) adopts an L-shaped structure, and the opening of the L-shaped structure faces the discharging port (12). The clamping mechanisms (42) are driven by a power mechanism (44) to complete the transfer of the PCB board from the feeding port (11) to the transfer plate (413) and the transfer of the PCB board from the transfer plate (413) to the discharging port (12).

9. The automatic cleaning device for PCB board ACF according to claim 8, wherein: The power mechanism (44) includes an adjusting screw rod (441) that penetrates through the slider (421). A corresponding adjusting screw sleeve is provided in the slider (421), and a positioning block is provided at the center in the length direction of the limiting groove (417). The adjusting screw rod (441) is rotatably connected in the positioning block, and the thread directions of the adjusting screw rod (441) on both sides of the positioning block are opposite.

10. An automatic ACF cleaning device for a PCB board according to claim 9, characterized in that: Impurity suction ports (415) are further installed on both sides of the center in the length direction of the base (41). The impurity suction ports (415) are connected to a vacuum cleaner in the device main body (1) through a dust suction pipe (416).

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