PCB cleaning device

Abstract

The invention relates to the technical field of PCB cleaning, and particularly discloses a PCB cleaning device which comprises a conveying assembly arranged in a shell and used for conveying a PCB and further comprises a cleaning roller and a dust removal adhesive tape which are located above the conveying assembly, and the dust removal adhesive tape abuts against the side face of the cleaning roller; a cleaning assembly is further arranged in the shell and comprises a dust blowing pipe connected with the air pump and a dust suction box connected with the vacuum pump, the dust blowing pipe and the dust suction box are located on the inner side and the outer side of the dust removal adhesive tape respectively, and a dust blowing hole and a dust suction hole are formed in the sides, close to each other, of the dust blowing pipe and the dust suction box respectively; when the conveying assembly conveys the PCB to pass through the cleaning roller, the cleaning roller rotates to clean the PCB; meanwhile, the dust removal adhesive tape rotates synchronously, and impurities adhered to the surface of the cleaning roller are stripped and transferred; then the dust blowing pipe blows and removes the dust adhesive tape, and the dust suction box synchronously sucks and collects impurities; the PCB cleaning device has the effect of improving the cleaning efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of PCB board cleaning, and more specifically to a PCB board cleaning device. Background Technology

[0002] A PCB (Printed Circuit Board) is a substrate that uses patterned conductive copper foil laid on the surface of an insulating material to achieve electrical connections between electronic components. During PCB processing, dust or metal particles may be present on the surface, or residual organic acids and ionic impurities may remain after soldering, affecting subsequent processing. Therefore, PCBs need to be cleaned.

[0003] Patent document CN209349125U discloses an online PCB cleaning device, including a conveying mechanism, an online cleaning mechanism, and several PCBs. The conveying mechanism includes a drive shaft, a conveyor belt driven by the drive shaft, and a metal mesh sleeved outside the conveyor belt. The online cleaning mechanism includes a dust collection device, a lifting adjustment mechanism, several cleaning rollers, and a layer of bristles covering the surface of the cleaning rollers. The dust collection device includes a dust collector, an exhaust hood, and an exhaust pipe connecting the dust collector and the exhaust hood. The air inlet of the exhaust hood, located above the cleaning rollers, covers the cleaning rollers. Several PCBs are placed on the metal mesh outside the conveyor belt. The drive ends of the cleaning rollers located above the conveyor belt are all fixed to the lifting adjustment mechanism and are driven to rise and fall by the lifting adjustment mechanism. The lifting adjustment mechanism includes a bracket, a lifting platform, and a lifting motor. The lifting platform is movably fixed to the top of the bracket, and the bottom of the lifting platform is connected to the lifting motor. The drive ends of the cleaning rollers are fixed to the side of the lifting platform. A connecting rod is also included, with one end fixed to the side of the lifting platform and the other end fixedly connected to the exhaust hood. The bristles are removable and cover the outside of the cleaning roller.

[0004] The above solution uses a transmission shaft in the conveying mechanism to drive the conveyor belt. A metal mesh fitted on the conveyor belt is used to support the PCB board. A layer of bristles covering several cleaning rollers that are raised and lowered by the lifting and adjusting mechanism cleans the dust on the surface of different PCB boards.

[0005] However, this solution has the following problems. Although it achieves PCB board cleaning through the cooperation of the conveying mechanism and the cleaning roller, it does not solve the problem of dust gradually increasing on the outer layer of the cleaning roller as cleaning time increases. This problem directly leads to a significant decrease in the cleaning effect of the cleaning roller on subsequent PCB boards. Dust or metal particles that could have been effectively removed cannot be completely removed, and residual impurities will adhere to the PCB board surface, thus affecting the accuracy and quality of subsequent soldering, assembly, and other processing steps. Moreover, if the cleaning roller carrying a large amount of dust continues to work, it may cause secondary contamination on the PCB board surface, increasing the product defect rate. In addition, to ensure the cleaning effect, operators need to frequently stop the machine to clean the cleaning roller, which not only interrupts the production process but also reduces production efficiency. Summary of the Invention

[0006] This invention provides a PCB board cleaning device, which aims to solve the problems in related technologies where dust accumulates on the outer layer of the cleaning roller after long-term operation, leading to a decrease in the subsequent PCB board cleaning effect, easy secondary pollution, and the need for frequent shutdowns for cleaning, thus reducing production efficiency and increasing labor costs.

[0007] The PCB board cleaning device of the present invention includes a conveying assembly disposed within a housing for conveying PCB boards, and further includes a cleaning roller and a dust removal adhesive tape located above the conveying assembly, the dust removal adhesive tape and the side of the cleaning roller abutting against each other; the housing also contains a cleaning assembly, which includes a dust blowing pipe connected to an air pump and a dust collection box connected to a vacuum pump, the dust blowing pipe and the dust collection box being located on the inner and outer sides of the dust removal adhesive tape respectively, and the dust blowing pipe and the dust collection box having a dust blowing hole and a dust suction hole respectively on the side closest to each other; when the conveying assembly conveys the PCB board past the cleaning roller, the cleaning roller rotates to clean the PCB board; at the same time, the dust removal adhesive tape rotates synchronously, peeling off and transferring the impurities adhering to the surface of the cleaning roller; subsequently, the dust blowing pipe blows the dust removal adhesive tape and the dust collection box simultaneously collects the impurities.

[0008] The effect is that by setting up cleaning rollers to clean the PCB board, and simultaneously using a dust-removing adhesive tape to clean the cleaning rollers, the cleaning performance of the cleaning rollers is guaranteed. Specifically, the conveyor assembly moves the PCB board past the cleaning rollers, which rotate to clean the PCB board. At the same time, the dust-removing adhesive tape comes into contact with the cleaning rollers and rotates synchronously. The dust-removing adhesive tape removes impurities and dust from the cleaning rollers. Then, a dust-blowing plate blows air onto the dust-removing adhesive tape to remove impurities from its surface. Simultaneously, a dust collection box collects the blown dust to ensure the cleaning effect of the dust-removing adhesive tape, thereby ensuring the cleaning effect of the cleaning rollers. This avoids secondary contamination of the PCB board due to excessive impurities on the surface of the cleaning rollers, while also reducing the frequency of cleaning roller replacement and improving production efficiency.

[0009] Preferably, a pusher is provided inside the housing, and the output end of the pusher is connected to the cleaning roller to drive the cleaning roller to move up and down. The cleaning roller includes multiple circumferentially arranged cleaning plates, and the line connecting the center of the cleaning plate and the axis of the cleaning roller is perpendicular to the cleaning plate.

[0010] Its effect is that by setting the pusher to connect with the cleaning roller, the pusher can drive the cleaning roller to move up and down, thereby adjusting the distance between the cleaning roller and the conveying component to accommodate PCB boards of different thicknesses.

[0011] Preferably, the dust removal tape is provided with two horizontally spaced upper guide rollers and a lower guide roller located below the upper guide rollers, so that the part of the dust removal tape between the two upper guide rollers is horizontal and the part between the upper guide roller and the lower guide roller is inclined. The dust blowing pipe and the dust collection box are respectively located on both sides of the horizontal part of the dust removal tape, and the inclined part of the dust removal tape abuts against the side of the cleaning roller.

[0012] Preferably, the dust removal tape is provided with a pressing component, which includes: an elastic element connected to the housing and a pressing plate connected to the elastic element. The side of the pressing plate away from the elastic element abuts against the inclined position of the dust removal tape. The elastic element is used to drive the pressing plate to move in the direction of the cleaning roller axis. The line connecting the center of the pressing plate and the cleaning roller axis is perpendicular to the pressing plate.

[0013] The effect is that the elastic element drives the pressing plate to move closer to the inclined part of the dust removal tape, so that the inclined part of the dust removal tape comes into contact with the cleaning plate, increasing the contact area between the two and further improving the cleaning effect on the cleaning plate.

[0014] Preferably, the end of the cleaning roller is coaxially provided with a mounting plate, and multiple protrusions are circumferentially provided on the mounting plate. The protrusions correspond to the gaps between two adjacent cleaning plates. The end of the pressing plate extends to the outside of the dust removal tape and corresponds to the protrusions. When the cleaning roller drives the protrusions to rotate to the pressing plate, the protrusions cooperate with the pressing plate and drive the pressing plate to move away from the cleaning roller. While the pressing plate moves, it compresses the elastic element.

[0015] Its effect is that when the cleaning roller rotates, it drives the mounting plate and protrusions to rotate synchronously. Multiple protrusions rotate and pass through the pressing plate in sequence. Under the action of the elastic element, the corresponding part of the dust removal tape moves back and forth, so that when each cleaning plate rotates to the dust removal tape, the pressing plate can press the inclined part of the dust removal tape to abut against the cleaning plate, thereby improving the cleaning effect on the cleaning plate.

[0016] Preferably, the cleaning roller has a hollow structure, and an eccentric guide rod is coaxially arranged inside the cleaning roller. The eccentric guide rod is fixedly connected to the output end of the pusher. The protrusion of the eccentric guide rod is arranged in the direction towards the pressing plate. Multiple top plates are arranged circumferentially on the cleaning roller. The top plate is located between two adjacent cleaning plates and slides in the direction towards the axis of the cleaning roller. A top rod is rotatably arranged on the side of the top plate away from the cleaning roller. When the top plate rotates with the cleaning roller to the protrusion of the eccentric guide rod, the protrusion of the eccentric guide rod drives the top rod to move in the direction towards the pressing plate, so that the top rod abuts against the dust removal tape.

[0017] Its effect is that by setting an eccentric guide rod inside the cleaning roller, when the top plate rotates to the protrusion on the eccentric guide rod, the protrusion of the eccentric guide rod drives the top plate to move closer to the dust removal tape. The top rod lifts the dust removal tape, at which point the protrusion drives the pressing plate to separate from the dust removal tape, and the top rod drives the dust removal tape to separate from the cleaning plate. The top rod and the top plate rotate in coordination, and the friction between the top rod and the dust removal tape is small, so that the position of the dust removal tape can be adjusted by rotating it.

[0018] Preferably, a mounting sleeve is horizontally slidably assembled inside the housing, and the end of the upper guide roller is rotatably engaged with the mounting sleeve. An elastic element two is provided inside the housing and connected to the mounting sleeve. The elastic element two is used to drive the upper guide roller to move in a direction away from the other upper guide roller.

[0019] Its effect is that the upper guide roller is connected to the elastic element two through the mounting sleeve, so that the upper guide roller can slide in the horizontal direction. When the pressing plate presses the dust removal tape or the top rod pushes the dust removal tape, the upper guide roller will move accordingly and compress the elastic element two, so that the dust removal tape remains taut during the process.

[0020] Preferably, the eccentric guide rod has a groove in the circumferential direction, and the top plate has a locking rod on the side near the eccentric guide rod. The locking rod is locked in the groove, and the locking rod and the groove slide together.

[0021] Its effect is that by setting the locking rod and the locking slot to engage, the top plate and the eccentric guide rod are kept in sync, preventing them from separating.

[0022] Preferably, the lower guide roller is positioned in the middle of the two upper guide rollers, and two sets of cleaning rollers are provided. The lower guide roller is located between the two cleaning rollers, and the two inclined positions on the dust removal tape abut against the sides of the two cleaning rollers respectively.

[0023] Preferably, both the pressing plate and the cleaning plate are arranged in a direction parallel to the axis of the cleaning roller, and the width of the pressing plate is greater than the width of the cleaning plate.

[0024] Beneficial effects: This invention features a dust-removing adhesive tape that abuts against the side of a cleaning roller. The closed tape, under the pressure of a pressing component, tightly contacts the inclined section of the cleaning roller, effectively peeling away impurities adhering to the roller's surface and preventing impurity accumulation that could reduce the roller's cleaning ability. Simultaneously, a blower and a dust collection box are included to clean the dust-removing adhesive tape, ensuring its cleaning effectiveness, reducing the frequency of cleaning roller replacement, and improving cleaning efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the dust removal adhesive tape in this invention.

[0027] Figure 3 yes Figure 2 A schematic diagram of the structure at point A in the middle.

[0028] Figure 4 yes Figure 2 A schematic diagram of the structure at point B.

[0029] Figure 5 This is a schematic diagram showing the positional relationship between the pressing plate and the dust removal adhesive tape in this invention.

[0030] Figure 6 This is a schematic diagram showing the positional relationship between the cleaning roller and the dust removal tape in this invention.

[0031] Figure 7 This is a schematic diagram of the pressing component in this invention.

[0032] Figure 8 This is a schematic diagram of the conveying component in this invention.

[0033] Figure 9 This is a schematic diagram of the eccentric guide rod and the top plate in this invention.

[0034] Figure label: 1. Housing; 11. Vacuum pump; 2. Conveying assembly; 21. Conveying plate; 211. Adjusting screw; 22. Conveying motor; 23. Conveying belt; 3. Cleaning roller; 31. Cleaning plate; 32. Mounting plate; 321. Protrusion; 4. Dust removal tape; 41. Horizontal position; 42. Inclined position; 5. Cleaning assembly; 51. Dust blowing pipe; 511. Dust blowing hole; 52. Dust collection box; 521. Dust collection hole; 6. Pushing component; 7. Upper guide roller; 71. Lower guide roller; 72. Mounting sleeve; 73. Elastic component two; 8. Pressing assembly; 81. Elastic component one; 82. Pressing plate; 9. Eccentric guide rod; 91. Top plate; 911. Top rod; 912. Locking rod; 92. Locking groove. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] like Figures 1 to 9As shown, the PCB board cleaning device of the present invention includes a conveying assembly 2, a cleaning roller 3, a dust removal adhesive tape 4, and a cleaning assembly 5 disposed within a housing 1. The cleaning roller 3 and the dust removal adhesive tape 4 are rotatably mounted within the housing 1. The conveying assembly 2 is used to convey the PCB board. The cleaning roller 3 and the dust removal adhesive tape 4 are disposed above the conveying assembly 2. The dust removal adhesive tape 4 abuts against the side of the cleaning roller 3. The cleaning roller 3 and the conveying assembly 2 are spaced apart so that when the conveying assembly 2 conveys the PCB board, it can drive the PCB board to pass under the cleaning roller 3. The dust removal adhesive tape 4 is used to clean the impurities adhering to the cleaning roller 3. The cleaning assembly 5 is used to clean the dust removal adhesive tape 4.

[0037] During PCB board cleaning, the conveying assembly 2 transports the PCB board and moves it under the cleaning roller 3. When the PCB board reaches the cleaning roller 3, the side of the cleaning roller 3 contacts the PCB board, and the cleaning roller 3 rotates to clean the PCB board. At the same time, the dust removal tape 4 rotates, peeling off and transferring the impurities adhering to the surface of the cleaning roller 3. Subsequently, the cleaning assembly 5 cleans the impurities on the dust removal tape 4 to ensure the cleaning effect of the dust removal tape 4 on the cleaning roller 3, thereby ensuring the cleaning effect of the dust removal tape 4 on the cleaning roller 3 and avoiding the accumulation of impurities on the cleaning roller 3, which would affect the cleaning effect. At the same time, it can reduce secondary contamination of the PCB board, reduce the replacement frequency of the cleaning roller 3, and improve the cleaning efficiency of the PCB board.

[0038] Reference Figure 2 , Figure 3 , Figure 6 A pusher 6 is provided inside the housing 1. The pusher 6 is a cylinder and is arranged vertically inside the housing 1. The output end of the pusher 6 is connected to the cleaning roller 3. The pusher 6 drives the cleaning roller 3 to move up and down, thereby adjusting the distance between the cleaning roller 3 and the conveying assembly 2 to adapt to the cleaning of PCB boards of different thicknesses.

[0039] Reference Figure 2 , Figure 3 , Figure 6The cleaning roller 3 includes multiple cleaning plates 31 arranged circumferentially around the rotation axis of the cleaning roller 3. The cleaning plates 31 are positioned radially perpendicular to the cleaning roller 3, and the line connecting the center of each cleaning plate 31 to the axis of the cleaning roller 3 is perpendicular to the cleaning plate 31. That is, the centerline of the cleaning plate 31 and the axis of the cleaning roller 3 are in the same plane, and the cleaning plate 31 is perpendicular to this plane. Bristles for cleaning impurities and dust are provided on the side of the cleaning plate 31 facing away from the axis of the cleaning roller 3. By providing bristles on the cleaning plate 31, the outer surface of the cleaning roller 3 becomes a regular polygon. When cleaning PCBs with components of different heights, the polygonal edges of the cleaning roller 3 can more effectively cut into the tiny gaps and uneven areas on the PCB surface, thereby removing more contaminants. Furthermore, the arrangement of multiple cleaning plates 31 increases the contact area between the bristles and the PCB surface, thus covering a larger cleaning area per unit time.

[0040] Reference Figure 2 , Figure 8 The conveying assembly 2 includes a conveying plate 21, a conveying motor 22, and a conveying belt 23. The conveying motor 22 is mounted on the conveying plate 21, and the output end of the conveying motor 22 is connected to the conveying belt 23, that is, the conveying motor 22 can drive the conveying belt 23 to rotate. The conveying belt 23 is located below the cleaning roller 3 and is spaced apart from the cleaning roller 3. The gap between the two is slightly smaller than the thickness of the PCB board, so that when the PCB board moves past the cleaning roller 3, the bristles on the surface of the cleaning roller 3 can appropriately fit the upper and lower surfaces of the PCB board, which can avoid excessive squeezing and damage to the board, and can fully clean the surface of solder slag, dust and other impurities, maximizing the cleaning effect.

[0041] To accommodate PCBs of different sizes, two sets of conveyor plates 21, conveyor motors 22, and conveyor belts 23 are arranged symmetrically side by side. The first set of conveyor plates 21, located closer to the equipment housing 1, is fixedly connected to the reinforcing ribs of the inner wall of the housing 1 by welding, maintaining a constant position. The other set of conveyor plates 21 is slidably assembled with a linear guide rail pre-set on the inner side of the housing 1 via a slider at the bottom, allowing it to move left and right horizontally. In the middle of the housing 1 between the two sets of conveyor plates 21, an adjusting screw 211 with positive and negative threads is rotatably mounted. One end of the adjusting screw 211 extends to the outside of the housing 1 and is connected to a knob-type handwheel, while the other end passes through a threaded hole on the side of the sliding conveyor plate 21 and forms a threaded engagement with it. The operator only needs to rotate the adjusting screw 211 clockwise or counterclockwise to adjust the distance between the two sets of conveyor plates 21 to accommodate the conveying of PCBs of different sizes.

[0042] Reference Figure 2 , Figure 4The cleaning component 5 includes a blower pipe 51 and a vacuum chamber 52. The dust removal tape 4 is a closed structure with its ends connected. The blower pipe 51 is located inside the dust removal tape 4, and the vacuum chamber 52 is located outside the dust removal tape 4, i.e., the blower pipe 51 and the vacuum chamber 52 are spaced apart. The blower pipe 51 has a blower hole 511 located on the side of the blower pipe 51 closest to the vacuum chamber 52. The vacuum chamber 52 has a suction hole 521 located on the side of the vacuum chamber 52 closest to the suction plate. The blower pipe 51 is connected to an air pump (not shown in the figure), which blows air through the blower hole 511 on the blower pipe 51. The vacuum chamber 52 is connected to a vacuum pump 11, which maintains a negative pressure inside the vacuum chamber 52 to generate suction through the suction hole 521.

[0043] Specifically, the airflow generated by the air pump is delivered through the dust blowing pipe 51 and blown directionally onto the surface of the dust removal tape 4 through the dust blowing hole 511 on the side of the dust blowing pipe 51 near the dust collection box 52. The airflow impact force blows away the impurities and dust adhering to the tape. At the same time, the vacuum pump 11 connected to the dust collection box 52 is started and a negative pressure is formed in the dust collection box 52. This causes the dust suction hole 521 on the side of the dust collection box 52 near the dust suction plate to generate suction force, so that the dust and impurities blown down by the airflow are quickly sucked into the dust collection box 52. Finally, the impurities are efficiently removed and collected, ensuring that the dust removal tape 4 remains clean to maintain the subsequent dust removal effect.

[0044] To effectively remove impurities and dust from the surface of the dust removal tape 4 during air blowing, and to facilitate the collection of these impurities and dust, the dust removal tape 4 is made of a flexible and breathable fiber fabric or porous membrane. This ensures that the airflow generated by the air pump can smoothly penetrate the tape and effectively peel off the impurities adhering to its surface. The surface of the dust removal tape 4 is coated with an adhesive of a specific viscosity. This adhesive must have stable adhesion retention capabilities to clean the cleaning roller 3 when the dust removal tape 4 comes into contact with it. In this embodiment, the blowing force is greater than the viscosity of the adhesive, so that impurities and dust on its surface are removed during air blowing.

[0045] Reference Figure 2 , Figure 5 An upper guide roller 7 and a lower guide roller 71 are provided inside the housing 1. Both the upper guide roller 7 and the lower guide roller 71 are located inside the dust removal tape 4. There are two upper guide rollers 7, which are arranged at a distance along the horizontal direction. There is one lower guide roller 71, which is located below the upper guide rollers 7. The dust removal tape 4 is sleeved on the outside of the upper guide rollers 7 and the lower guide roller 71, that is, the upper guide rollers 7 and the lower guide roller 71 abut against the inner side of the dust removal tape 4 to support the dust removal tape 4. A motor connected to the lower guide roller 71 is provided inside the housing 1. The output shaft of the motor is coaxially connected to the lower guide roller 71 to drive the dust removal tape 4 to rotate.

[0046] Reference Figure 5 After the upper guide roller 7 and lower guide roller 71 support the dust removal tape 4, the portion of the dust removal tape 4 between the two upper guide rollers 7 is the horizontal position 41, and the portion between the upper guide roller 7 and lower guide roller 71 is the inclined position 42. The dust blowing pipe 51 and the dust suction box 52 are located on the upper and lower sides of the horizontal position 41, respectively, to maximize the area of ​​the dust removal tape 4 corresponding to blowing and suction, thereby improving the cleaning effect on the dust removal tape 4. The inclined position 42 abuts against the side of the cleaning roller 3. When the cleaning roller 3 rotates, it can drive the cleaning plate 31 to abut against the inclined position 42, thereby increasing the contact area between the dust removal tape 4 and the cleaning plate 31, and thus improving the cleaning effect on the cleaning plate 31.

[0047] The presence of two upper guide rollers 7 and one lower guide roller 71 creates two inclined positions 42 and one horizontal position 41 on the dust removal tape 4. The lower guide roller 71 corresponds to the midpoint of the two upper guide rollers 7, ensuring that the inclination angles of the two inclined positions 42 on the dust removal tape 4 are the same. Two sets of cleaning rollers 3 are correspondingly provided, arranged sequentially along the PCB board conveying path, each set corresponding to one of the two inclined positions 42. The two cleaning rollers 3 allow for repeated cleaning of the PCB board. Simultaneously, the dust removal tape 4 can clean impurities and dust from both cleaning rollers 3, preventing them from failing due to impurity accumulation, reducing equipment downtime for maintenance, and further ensuring cleaning efficiency and stability during continuous PCB board production. Furthermore, the consistent inclination angles of the two inclined positions 42 ensure that the dust removal tape 4 experiences balanced force and does not shift during operation.

[0048] Reference Figure 2 , Figure 3 , Figure 5 A pressing assembly 8 is provided inside the dust removal tape 4. The pressing assembly 8 includes: an elastic element 81 and a pressing plate 82. The elastic element 81 is a spring. One end of the elastic element 81 is connected to the housing 1, and the other end is connected to the pressing plate 82. The pressing plate 82 and the elastic element 81 are located on the inner side of the dust removal tape 4. The elastic element 81 is used to drive the pressing plate 82 to slide in the direction toward the axis of the cleaning roller 3. Under the action of the elastic element 81, the pressing plate 82 abuts against the inner side of the inclined position 42 on the dust removal tape 4. The line connecting the center of the pressing plate 82 and the axis of the cleaning roller 3 is perpendicular to the pressing plate 82. That is, when the cleaning plate 31 rotates to be directly opposite the pressing plate 82, the two are in a parallel state.

[0049] When the cleaning plate 31 rotates to the inclined position 42, the elastic element 81 drives the pressing plate 82 to abut against the inclined position 42 of the dust removal tape 4, and also drives the dust removal tape 4 to abut against the cleaning plate 31. Since the cleaning plate 31 and the pressing plate 82 are in a parallel state at this time, the contact area between the dust removal tape 4 and the cleaning plate 31 is increased under the action of the pressing plate 82, thereby improving the cleaning effect on the cleaning plate 31. There are two sets of elastic elements 81 and pressing plates 82, and the two sets of pressing plates 82 are correspondingly set with the two inclined positions 42 on the dust removal tape 4 to assist in cleaning the two cleaning rollers 3 at the same time.

[0050] Reference Figure 6 , Figure 7 A mounting plate 32 is provided at the end of the cleaning roller 3. The mounting plate 32 is coaxially arranged with the cleaning roller 3. A plurality of protrusions 321 are arranged circumferentially on the mounting plate 32. The plurality of protrusions 321 correspond one-to-one with a plurality of cleaning plates 31, and the protrusions 321 are located between two adjacent cleaning plates 31. The end of the pressing plate 82 extends to the outside of the dust removal adhesive tape 4 and corresponds to the protrusions 321.

[0051] When the cleaning roller 3 rotates, the mounting plate 32 rotates accordingly, simultaneously driving the protrusion 321 to rotate. As the protrusion 321 rotates closer to the pressing plate 82, it engages with the pressing plate 82, causing the pressing plate 82 to move away from the cleaning roller 3. Simultaneously, it compresses the elastic element 81. When the protrusion 321 rotates to the point of separation from the pressing plate 82, the elastic element 81 causes the pressing plate 82 to reset. This achieves the reciprocating movement of the pressing plate 82. As the pressing plate 82 moves towards the cleaning roller 3, it maximizes the contact between the dust removal tape 4 and the cleaning plate 31, improving the cleaning effect of the dust removal tape 4 on the cleaning plate 31.

[0052] Reference Figure 3 Both the pressing plate 82 and the cleaning plate 31 are arranged in a direction parallel to the axis of the cleaning roller 3, and the width of the pressing plate 82 is greater than the width of the cleaning plate 31.

[0053] The width of the pressing plate 82 is set to be greater than the width of the cleaning plate 31. After the pushing component 6 adjusts the position of the cleaning roller 3 up and down, the cleaning plate 31 can abut against the pressing plate 82 when it rotates to the position of the pressing plate 82. At the same time, since the thickness difference of PCBs of different specifications is small, the pushing component 6 will only adjust the cleaning roller 3 within a small range to avoid the cleaning plate 31 moving out of the pressing range of the pressing plate 82 when the cleaning roller 3 moves up and down.

[0054] An mounting sleeve 72 is slidably assembled in the horizontal direction inside the housing 1. Two mounting sleeves 72 are provided corresponding to the upper guide rollers 7, and the upper guide rollers 7 are rotatably connected to the mounting sleeves 72. An elastic element 73 is provided inside the housing 1 and is connected to the mounting sleeves 72 to drive the mounting sleeves 72 to move in a direction away from the other mounting sleeve 72.

[0055] Reference Figure 2 , Figure 5 The elastic element 73 drives the two mounting sleeves 72 to move away from each other. As the mounting sleeves 72 move, they also drive the upper guide roller 7 to move, thereby tensioning the dust removal tape 4. Furthermore, during the reciprocating pressing of the pressing plate 82 on the dust removal tape 4, the dust removal tape 4 is kept in a taut state at all times.

[0056] Reference Figure 3 , Figure 9 The cleaning roller 3 has a hollow structure. An eccentric guide rod 9 is coaxially arranged inside the cleaning roller 3. The eccentric guide rod 9 is fixedly connected to the output end of the pusher 6. Pushers 6 are located at both ends of the cleaning roller 3, and the output ends of both pushers 6 are rotatably connected to the cleaning roller 3. One pusher 6 is equipped with a motor (not shown in the figure) that is connected to and drives the cleaning roller 3 to rotate. The output end of the other pusher 6 is fixedly connected to the eccentric guide rod 9. This ensures that the eccentric guide rod 9 remains relatively fixed when the cleaning roller 3 rotates.

[0057] Reference Figure 3 The protrusion of the eccentric guide rod 9 is positioned towards the pressing plate 82. Multiple top plates 91 are circumferentially arranged on the cleaning roller 3, each corresponding to a cleaning plate 31, with each top plate 91 positioned between two adjacent top plates 91. The top plates 91 slide on the cleaning roller 3 in a direction towards its axis. A push rod 911 is rotatably mounted on the side of the top plate 91 opposite to the axis of the cleaning roller 3, and the push rod 911 is parallel to the axis of the cleaning roller 3.

[0058] Initially, the top plate 91 abuts against the side of the eccentric guide rod 9, and the top rod 911 corresponds to the edge of the cleaning plate 31. When the cleaning roller 3 rotates, it drives the top plate 91 to rotate as well, and the top plate 91 rotates relative to the eccentric guide rod 9. When the top plate 91 rotates to the protrusion of the eccentric guide rod 9, the protrusion of the eccentric guide rod 9 drives the top plate 91 to move in the direction toward the pressing plate 82, thereby driving the top rod 911 to abut against the dust removal tape 4.

[0059] Reference Figure 3 The protrusions and protrusions 321 of the eccentric guide rod 9 correspond to the gaps between the two cleaning plates 31. This ensures that when the protrusion 321 pushes against the pressing plate 82, the push rod 911 pushes against the dust removal tape 4. That is, after the protrusion 321 causes the pressing plate 82 to separate from the dust removal tape 4, the push rod 911 pushes against the dust removal tape 4, causing the dust removal tape 4 to separate from the cleaning plate 31. At this time, the dust removal tape 4 rotates, moving to the next position so that the cleaning plate 31 can be cleaned again. When the push rod 911 causes the dust removal tape 4 to separate from the cleaning plate 31, only the push rod 911 is in contact with the dust removal tape 4. The push rod 911 is rotatably connected to the top plate 91 to reduce the friction when the dust removal tape 4 moves, making it easier to adjust the position of the dust removal tape 4.

[0060] Reference Figure 9 A slot 92 is provided circumferentially on the eccentric guide rod 9, and a locking rod 912 is provided on the side of the top plate 91 near the eccentric guide rod 9. The locking rod 912 is engaged in the slot 92 and slides within the slot 92. When the top plate 91 rotates over the cleaning roller 3, it causes the locking rod 912 to slide within the slot 92. At the same time, the locking rod 912 cooperates with the slot 92 to reduce the possibility of the top plate 91 and the eccentric guide rod 9 disengaging, thus maintaining a stable engagement between the two.

[0061] The implementation principle of this invention is as follows: Before cleaning the PCB board, the distance between the two sets of conveyor plates 21 is adjusted according to the size of the PCB board, and the PCB board is stably conveyed to the bottom of the cleaning roller 3 by the conveyor belt 23. The vertically arranged pusher 6 inside the housing 1 can adjust the distance between the cleaning roller 3 and the conveyor assembly 2 to adapt to PCB boards of different thicknesses. When the PCB board passes by, the cleaning roller 3 rotates, and the cleaning plates 31 with brushes arranged around its periphery come into contact with the PCB board, efficiently cleaning surface solder slag, dust and other impurities. The edge of the polygonal cleaning roller 3 formed by the cleaning plates 31 can cut into tiny gaps to improve cleanliness. At the same time, the closed dust removal tape 4 sleeved on the upper guide roller 7 and the lower guide roller 71 abuts against the inclined position 42 of the cleaning roller 3 under the action of the pressing assembly 8, peeling off the impurities on the surface of the cleaning roller 3. Then, the dust blowing pipe 51 blows air in a direction to blow away the impurities from the dust removal tape 4, and the dust collection box 52 simultaneously sucks away the impurities under negative pressure to achieve centralized collection, ensuring that the dust removal tape 4 is continuously clean. In addition, the protrusion 321 of the mounting plate 32 at the end of the cleaning roller 3 cooperates with the pressing plate 82 to drive the pressing plate 82 to move back and forth, thereby enhancing the contact effect between the dust removal adhesive tape 4 and the cleaning plate 31. The eccentric guide rod 9 inside the cleaning roller 3 works in cooperation with the top plate 91 and the top rod 911 to push the dust removal adhesive tape 4 when the protrusion 321 separates the pressing plate 82, thereby reducing friction and facilitating its rotation and repositioning. The two sets of cleaning rollers 3 can also repeatedly clean the PCB board.

[0062] The system achieves PCB board adaptation and conveying, multi-round efficient cleaning, and timely removal of impurities, reducing secondary contamination of PCB boards and the frequency of cleaning roller replacement, improving cleaning efficiency and stability, adapting to different PCB board specifications, and ensuring continuous production needs.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A PCB board cleaning device, comprising a conveying assembly disposed within a housing for conveying PCB boards, characterized in that, Also includes: The cleaning roller and the dust removal tape are located above the conveying assembly, and the dust removal tape and the side of the cleaning roller abut against each other; The housing also includes a cleaning assembly, which consists of a dust-blowing pipe connected to an air pump and a dust-collecting box connected to a vacuum pump. The dust-blowing pipe and the dust-collecting box are located on the inner and outer sides of the dust removal tape, respectively. The dust-blowing pipe and the dust-collecting box have dust-blowing holes and dust-collecting holes on the side closest to each other, respectively. When the conveying assembly conveys the PCB board through the cleaning roller, the cleaning roller rotates to clean the PCB board. At the same time, the dust removal tape rotates synchronously to peel off and transfer the impurities adhering to the surface of the cleaning roller. Subsequently, the dust-blowing pipe blows the dust removal tape and the dust-collecting box simultaneously collects the impurities.

2. The PCB board cleaning device according to claim 1, characterized in that, A pusher is provided inside the housing. The output end of the pusher is connected to the cleaning roller to drive the cleaning roller to move up and down. The cleaning roller includes multiple circumferentially arranged cleaning plates. The line connecting the center of the cleaning plate and the axis of the cleaning roller is perpendicular to the cleaning plate.

3. The PCB board cleaning device according to claim 2, characterized in that, The dust removal tape is equipped with two horizontally spaced upper guide rollers and a lower guide roller located below the upper guide rollers, so that the part of the dust removal tape between the two upper guide rollers is horizontal and the part between the upper guide rollers and the lower guide roller is inclined. The dust blowing pipe and the dust collection box are located on both sides of the horizontal part of the dust removal tape, and the inclined part of the dust removal tape abuts against the side of the cleaning roller.

4. The PCB board cleaning device according to claim 3, characterized in that, The dust removal tape is equipped with a pressing assembly, which includes: an elastic element 1 connected to the housing and a pressing plate connected to the elastic element 1. The side of the pressing plate away from the elastic element 1 abuts against the inclined position of the dust removal tape. The elastic element 1 is used to drive the pressing plate to move in the direction of the cleaning roller axis. The line connecting the center of the pressing plate and the cleaning roller axis is perpendicular to the pressing plate.

5. The PCB board cleaning device according to claim 4, characterized in that, A mounting plate is coaxially mounted at the end of the cleaning roller. Multiple protrusions are arranged circumferentially on the mounting plate. The protrusions correspond to the gaps between two adjacent cleaning plates. The end of the pressing plate extends to the outside of the dust removal tape and corresponds to the protrusions. When the cleaning roller drives the protrusions to rotate to the pressing plate, the protrusions cooperate with the pressing plate, driving the pressing plate to move away from the cleaning roller. While the pressing plate moves, it compresses the elastic element.

6. The PCB board cleaning device according to claim 5, characterized in that, The cleaning roller has a hollow structure, and an eccentric guide rod is coaxially arranged inside the cleaning roller. The eccentric guide rod is fixedly connected to the output end of the pusher. The protrusion of the eccentric guide rod is arranged in the direction towards the pressing plate. Multiple top plates are arranged circumferentially on the cleaning roller. The top plate is located between two adjacent cleaning plates and slides in the direction towards the axis of the cleaning roller. A top rod is rotatably arranged on the side of the top plate away from the cleaning roller. When the top plate rotates with the cleaning roller to the protrusion of the eccentric guide rod, the protrusion of the eccentric guide rod drives the top rod to move in the direction towards the pressing plate, so that the top rod abuts against the dust removal tape.

7. The PCB board cleaning device according to claim 6, characterized in that, An mounting sleeve is horizontally slidably assembled inside the housing. The end of the upper guide roller is rotatably engaged with the mounting sleeve. An elastic element two is provided inside the housing and connected to the mounting sleeve. The elastic element two is used to drive the upper guide roller to move away from the other upper guide roller.

8. The PCB board cleaning device according to claim 6, characterized in that, The eccentric guide rod has a groove in the circumferential direction, and a locking rod is provided on the side of the top plate near the eccentric guide rod. The locking rod is locked in the groove, and the locking rod and the groove slide together.

9. The PCB board cleaning device according to claim 4, characterized in that, The lower guide roller is positioned in the middle of the two upper guide rollers. There are two sets of cleaning rollers. The lower guide roller is located between the two cleaning rollers. The two inclined positions on the dust removal tape abut against the sides of the two cleaning rollers respectively.

10. The PCB board cleaning device according to claim 4, characterized in that, Both the pressing plate and the cleaning plate are arranged in a direction parallel to the axis of the cleaning roller, and the width of the pressing plate is greater than the width of the cleaning plate.

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