A circuit board continuous processing production line with foreign matter protection function

Abstract

The utility model discloses a kind of line board continuous processing production lines with foreign matter protection function, including the acid washing unit of sequentially connected settings, alkali washing unit, brown unit, dry board unit, acid washing unit, alkali washing unit, brown unit, dry board unit between are all provided with water washing unit;Water washing unit and adjacent processing unit are all connected by conveyer belt, the top of conveyer belt is provided with anti-foreign matter falling device, anti-foreign matter falling device includes transparent protective cover, transparent protective cover completely covers the junction of adjacent processing unit and water washing unit, and transparent protective cover can prevent foreign matter from falling on the line board on conveyer belt.

Description

Technical Field

[0001] This utility model relates to the field of PCB manufacturing technology, and in particular to a continuous processing production line for circuit boards with foreign object protection function. Background Technology

[0002] PCB browning treatment is a key process in the surface treatment of inner copper foil, which forms a nano-scale rough copper oxide layer (CuO or Cu2O) on the surface of copper foil through chemical oxidation.

[0003] Currently, the browning process for PCBs generally includes acid washing, alkaline washing, pre-immersion, browning, drying, and cooling. Each step involves transporting the PCB board via a conveyor belt. However, in current PCB browning equipment, the joints between processing units are exposed to the external environment during PCB transport. This allows fine particles such as dust and fibers to easily fall and adhere to the PCB surface, hindering the degreasing agent's contact with the copper foil during browning and resulting in incomplete cleaning in certain areas. Residual contaminants can affect the uniformity of subsequent micro-etching and even reduce oxide layer adhesion. Furthermore, insufficient cleaning of the circuit board can cause residual foreign matter to obscure the copper foil surface, leading to differences in micro-etching rates and insufficient roughness in certain areas. Insufficient roughness results in poor resin wetting and reduced adhesion; excessive roughness, on the other hand, can increase high-frequency signal loss. Therefore, improving and ensuring the cleanliness of the PCB surface is crucial during PCB production. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a continuous circuit board processing production line with foreign object protection function. During the PCB browning and transfer process, it can prevent foreign objects from falling onto the PCB surface during transfer, improving the cleanliness of the PCB surface and contributing to improved PCB production quality.

[0005] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function includes: an acid washing unit, an alkaline washing unit, a browning unit, and a dry board unit arranged in sequence, with a water washing unit provided between each of the acid washing unit, alkaline washing unit, browning unit, and dry board unit.

[0006] The washing unit and the adjacent processing unit are connected by a conveyor belt. A foreign object falling prevention device is installed above the conveyor belt. The foreign object falling prevention device includes a transparent protective cover. The transparent protective cover completely covers the connection between the adjacent processing unit and the washing unit. The transparent protective cover can prevent foreign objects from falling onto the circuit board on the conveyor belt.

[0007] A continuous circuit board processing production line with foreign object protection according to an embodiment of this utility model has at least the following beneficial effects: The continuous circuit board processing production line provided in this application, by setting a water washing unit between each processing unit, washes and cleans each circuit board entering the next processing unit, ensuring the cleanliness of the circuit board surface and preventing the circuit board from having residual chemical solutions from the previous processing step on the board surface when proceeding to the next processing step. The water washing unit is connected to adjacent processing units via a conveyor belt, allowing the circuit boards to be automatically transported to the next processing step and the water washing unit, improving equipment automation and production efficiency. Since the conveyor belt is located at the connection between the water washing unit and adjacent processing units, foreign objects in the environment may fall and adhere to the circuit boards on the conveyor belt. Therefore, this application adds a foreign object falling prevention device at the connection between the water washing unit and adjacent processing units. Specifically, the foreign object falling prevention device includes a transparent protective cover installed above the conveyor belt. This cover completely covers the connection between the washing unit and adjacent processing units, effectively preventing foreign objects (such as dust, metal shavings, fibers, etc.) from falling onto the circuit boards. This avoids the impact of foreign objects on the surface quality of the circuit boards and improves the product yield. Furthermore, the transparent cover provides visibility, allowing operators to observe the circuit board conveying status in real time without frequent shutdowns for inspection, thereby improving the continuous operation capability and production efficiency of the production line. Additionally, the complete coverage design of the transparent cover reduces the possibility of operators coming into contact with hazardous areas, improving the safety of the production line.

[0008] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function is provided with a locking mechanism between a transparent protective cover and a conveyor belt. The locking mechanism includes a first magnet and a second magnet. The first magnet is disposed in one of the transparent protective cover and the conveyor belt, and the second magnet is disposed in the other of the transparent protective cover and the conveyor belt. The first magnet and the second magnet are magnetically connected.

[0009] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function is provided with a silicone sealing strip on the side of the transparent protective cover facing the conveyor belt.

[0010] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function has one end of a transparent protective cover abutting against the outer wall of a water washing unit and the other end abutting against the outer wall of an adjacent processing unit.

[0011] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function is provided with silicone sealing strips at both ends of the transparent protective cover. The two silicone sealing strips are respectively provided on the same side as the water washing unit and the adjacent processing unit.

[0012] According to an embodiment of the present invention, a continuous processing production line for circuit boards with foreign object protection function further includes a feeding unit located upstream of the pickling unit. The feeding unit includes a feeding device and a dust-adhesive device connected in sequence. The dust-adhesive device includes two dust-adhesive mechanisms arranged at intervals along the vertical direction. Each dust-adhesive mechanism includes multiple dust-adhesive rollers arranged at intervals along the circuit board conveying direction. There is a first channel between the two dust-adhesive mechanisms for the circuit board to pass through.

[0013] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function includes a dust-adhesion device, which further includes a first body. The first body is provided with a dust-adhesion chamber, and a dust-adhesion mechanism is disposed in the dust-adhesion chamber. The dust-adhesion mechanism is slidably connected to the first body, and both sides of the dust-adhesion chamber are provided with movable openings for the dust-adhesion mechanism to enter and exit the dust-adhesion chamber.

[0014] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function includes a dust-adhesion mechanism comprising two dust-adhesion components. The two dust-adhesion components extend and are arranged along the axis of the dust-adhesion roller. The two dust-adhesion components can alternately enter and exit the dust-adhesion chamber. Each dust-adhesion component includes a first support, a dust-adhesion roller, and a first driving component. The first support is slidably connected to a first machine body. The dust-adhesion roller is mounted on the first support and is rotatably connected to the first support. The first driving component is fixed on the first support and is drively connected to the dust-adhesion roller. The first driving component can drive the dust-adhesion roller to rotate.

[0015] According to an embodiment of the present invention, a continuous circuit board processing production line with foreign object protection function further includes a cleaning unit disposed downstream of the dry board unit. The cleaning unit includes two cleaning devices disposed opposite each other in the vertical direction. A second channel for the circuit board to pass through is provided between the two cleaning devices. The cleaning device includes a second body and a cleaning brush. The second body is provided with a first cavity. The first cavity has an opening on the side facing the circuit board. The cleaning brush is installed in the first cavity. Part of the structure of the cleaning brush can contact the surface of the circuit board through the opening of the first cavity. The cleaning brush is rotatably connected to the second body.

[0016] According to an embodiment of the present invention, a continuous processing production line for circuit boards with foreign object protection function is provided. The cleaning device further includes a vacuum suction mechanism. An exhaust port is provided at the bottom of the first cavity. The vacuum suction mechanism is connected to the exhaust port through a pipeline.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the water washing unit, processing unit, and foreign object falling prevention device according to an embodiment of the present utility model;

[0020] Figure 2 This is a first-view structural schematic diagram of the dust-adhesive device according to an embodiment of the present utility model;

[0021] Figure 3 This is a second-view structural schematic diagram of the dust-adhesive device according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the cleaning device according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the air-drying device according to an embodiment of the present utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] Water washing unit 1;

[0026] Processing unit 2;

[0027] Circuit board 3;

[0028] Conveyor belt 100; V-shaped guide plate 110; Liquid collection tank 120;

[0029] 200 transparent protective cover; 210 emergency handle;

[0030] 300 silicone sealing strip;

[0031] Dust-adhesion mechanism 400; first body 410; dust-adhesion chamber 411; dust-adhesion roller 420; first channel 430; first support 440;

[0032] Cleaning device 500; second body 510; first cavity 511; exhaust port 5111; cleaning brush 520; second channel 530;

[0033] Ductwork 600; Strip-shaped air outlet 610. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 5This utility model provides a continuous processing production line for circuit boards with foreign object protection. The continuous processing production line for circuit boards 3 provided in this application includes a feeding unit, an acid washing unit, an alkaline washing unit, a browning unit, a drying unit, a cooling unit, a cleaning unit, and an unloading unit connected sequentially along the processing route of the circuit boards 3. Each of the acid washing unit, alkaline washing unit, browning unit, and drying unit is equipped with a water washing unit 1. By setting up a water washing unit 1 between each processing unit 2, each circuit board 3 entering the next processing unit 2 is washed and cleaned, ensuring the cleanliness of the circuit board surface and preventing the circuit board 3 from having residual chemical solutions from the previous processing step on the surface when proceeding to the next processing step. The water washing unit 1 is connected to adjacent processing steps via a conveyor belt 100, allowing the circuit boards 3 to be automatically transported to the next processing step and the water washing unit 1 via the conveyor belt 100, improving equipment automation and production efficiency. Since the conveyor belt 100 is located at the connection between the washing unit 1 and the adjacent processing unit 2, foreign objects in the environment may fall and adhere to the circuit board 3 on the conveyor belt 100. Therefore, this application adds a foreign object falling prevention device at the connection between the washing unit 1 and the adjacent processing unit 2. Specifically, the foreign object falling prevention device includes a transparent protective cover 200 disposed above the conveyor belt 100. The transparent protective cover 200 completely covers the connection between the washing unit 1 and the adjacent processing unit 2, effectively preventing foreign objects (such as dust, metal shavings, fibers, etc.) from falling onto the circuit board 3, avoiding the impact of foreign objects on the surface quality of the circuit board 3, and improving the product qualification rate. Furthermore, the transparent protective cover 200 provides visibility, allowing operators to observe the conveying status of the circuit board 3 in real time without frequent shutdowns for inspection, thereby improving the continuous operation capability and production efficiency of the production line. Further, the complete coverage design of the transparent protective cover 200 also reduces the possibility of operators contacting hazardous areas, improving the safety of the production line.

[0039] As shown in the figure, the space between the washing unit 1 and the adjacent processing unit 2 forms a position for placing the transparent protective cover 200. The transparent protective cover 200 is directly set between the washing unit 1 and the adjacent processing unit 2 and covers the conveyor belt 100. Specifically, one side of the transparent protective cover 200 is connected to the frame of the conveyor belt 100, while the left and right sides of the transparent protective cover 200 abut against the outer wall of the washing unit 1 and the outer wall of the adjacent processing unit 2, respectively. This provides stable support for the transparent protective cover 200 in the horizontal direction, preventing the cover from shifting or falling off due to vibration of the production line, reducing unnecessary space occupation, and optimizing the layout of the production line.

[0040] Furthermore, as a further improvement to the solution, a locking mechanism is provided between the transparent protective cover 200 and the conveyor belt 100. The locking mechanism includes a first magnet and a second magnet. The first magnet is mounted on the transparent protective cover 200, and the second magnet is mounted on the frame of the conveyor belt 100. The first and second magnets are magnetically connected. This magnetic connection makes the installation and removal of the transparent protective cover 200 very convenient, eliminating the need for complex tools or screws and saving maintenance time. Moreover, since the equipment may vibrate during operation, the locking mechanism provides a stable fixing force, ensuring that the transparent protective cover 200 will not accidentally fall off during production line operation, thus guaranteeing the continuity of the protective effect. In addition, compared to mechanical locking mechanisms, the magnetic connection reduces friction and wear between components, extending the service life of the equipment.

[0041] Furthermore, a silicone sealing strip 300 is provided on the side of the transparent protective cover 200 facing the conveyor belt 100. The silicone sealing strip 300 fills the tiny gap between the transparent protective cover 200 and the conveyor belt 100, further preventing the infiltration of foreign objects and liquids, and improving the sealing performance of the transparent protective cover 200. In addition, the silicone material has good cushioning properties, which can reduce noise and vibration generated during production line operation and improve the working environment. Furthermore, since the browning process of the circuit board 3 involves chemical solvents, the silicone sealing strip 300 has the advantages of wear resistance and corrosion resistance in the working environment, maintaining its sealing performance for a long time while reducing replacement frequency and maintenance costs.

[0042] Furthermore, silicone sealing strips 300 are provided at both ends of the transparent protective cover 200, and the two silicone sealing strips 300 are respectively provided on the same side as the washing unit 1 and the adjacent processing unit 2. That is, it can be understood that silicone sealing strips 300 are provided between the transparent protective cover 200 and the washing unit 1, and between the transparent protective cover 200 and the adjacent processing unit 2. Together with the silicone sealing strip 300 between the transparent protective cover 200 and the conveyor belt 100, a complete seal is achieved at the connection between the conveyor belt 100 and the washing unit 1 and the processing unit 2, further improving the protective effect.

[0043] Furthermore, an emergency handle 210 may be provided on the top of the transparent protective cover 200, which allows the user to remove the transparent protective cover 200 for easy maintenance of the conveyor belt 100.

[0044] According to some embodiments of this application, a pre-impregnation tank is also provided between the alkaline washing unit and the browning unit. The pre-impregnation tank adjusts the strongly alkaline environment of the circuit board 3 after alkaline washing to the weakly acidic environment required for browning, avoiding alkaline residue that could cause the browning solution to fail. Furthermore, a temperature control device can be provided in the pre-impregnation tank to match the board surface temperature with the liquid temperature of the browning tank, preventing thermal stress deformation.

[0045] According to some embodiments of this application, the feeding unit includes a feeding device and a dust-adhesive device connected in sequence. The dust-adhesive device includes two dust-adhesive mechanisms 400 arranged vertically at intervals. Each dust-adhesive mechanism 400 includes a plurality of dust-adhesive rollers 420 arranged at intervals along the conveying direction of the circuit board 3. A first channel 430 is provided between the two dust-adhesive mechanisms 400 for the circuit board 3 to pass through. When the circuit board 3 passes through the first channel 430, the dust-adhesive rollers 420 of the dust-adhesive mechanism 400 can stick to and remove foreign objects from the surface of the circuit board 3.

[0046] The dust-adhesive device includes a first body 410 and a dust-adhesive mechanism 400. The first body 410 is provided with a dust-adhesive chamber 411, which is located at a movable opening. Further, the dust-adhesive mechanism 400 consists of two dust-adhesive components, which extend along the axis of the dust-adhesive roller 420 and can alternately enter and exit the dust-adhesive chamber 411 through the movable opening. Specifically, as shown in the figure, the dust-adhesive component includes a first support 440, a dust-adhesive roller 420, and a first driving member. The two first supports 440 are fixedly connected in the horizontal direction and slidably connected to the first body 410. The dust-adhesive roller 420 is mounted on the first supports 440 and rotatably connected to the first supports 440. The first driving member is fixed to the first supports 440 and is drively connected to the dust-adhesive roller 420, enabling the first driving member to drive the dust-adhesive roller 420 to rotate. In other words, it can be understood that when the sticky roller 420 on one of the sticky components needs to be replaced, the user only needs to push or pull any one of the first brackets 440 to push out the sticky component currently in the sticky chamber 411 to replace the new sticky roller 420. The sticky component on the other side then enters the sticky chamber 411 to continue the dust removal and cleaning process on the circuit board 3. The design of two sticky components allows one component to be cleaned or replaced while the other is working, thereby achieving continuous cleaning and improving cleaning efficiency. The sticky components can be quickly switched by pushing or pulling, making the maintenance and replacement of the sticky roller 420 very convenient. The alternating entry and exit design of the sticky components reduces the production line downtime caused by cleaning or replacing the sticky roller 420 and improves the continuous operation capability of the production line.

[0047] According to some embodiments of this application, the adhesive roller 420 includes a roller body and an adhesive layer covering the outside of the roller body, wherein the adhesive layer and the roller body are detachable. Specifically, the adhesive layer may be made of self-adhesive silicone, requiring no additional adhesive, and can be washed and reused, making it suitable for fields with high cleanliness requirements such as precision electronics and semiconductors.

[0048] Alternatively, the adhesive layer may be an adhesive paper roll fitted onto the outer wall of the roller.

[0049] According to some embodiments of this application, the drying unit includes a drying device and a drying device arranged sequentially along the conveying direction of the circuit board 3. The drying device uses strong wind to remove the residual moisture on the surface of the circuit board 3 after washing, and then the drying device thoroughly dries the circuit board 3.

[0050] Specifically, the air-drying device includes a fan and an air duct 600. The fan is connected to the air duct 600 and supplies strong air to the air duct 600. The air duct 600 is provided with a strip-shaped air outlet 610. The air duct 600 is located on one side of the circuit board 3 and outputs strong air towards the circuit board 3. The strong air blows away residual liquid from the surface of the circuit board 3. Furthermore, air ducts 600 are provided on both sides of the surface of the circuit board 3 to simultaneously air-dry both sides of the circuit board 3. After air-drying, the circuit board 3 is sent to a drying device for thorough drying. The drying device can dry the circuit board 3 by using an infrared heater in conjunction with a hot air circulation mechanism.

[0051] According to some embodiments of this application, a cooling device is also provided between the drying device and the cleaning unit, and the cooling device can cool the circuit board 3 sent out by the drying device with cold air.

[0052] According to some embodiments of this application, the cleaning unit includes two cleaning devices 500 arranged vertically opposite each other, with a second channel 530 between the two cleaning devices 500 for the circuit board 3 to pass through. Each cleaning device 500 includes a second body 510 and a cleaning brush 520. The second body 510 has a first cavity 511 with an opening on the side facing the circuit board 3. The cleaning brush 520 is installed inside the first cavity 511, and a portion of the cleaning brush 520 can contact the surface of the circuit board 3 through the opening in the first cavity 511. The cleaning brush 520 is rotatably connected to the second body 510. The cleaning unit performs deep cleaning of the circuit board 3, removing any remaining microparticles and foreign matter from its surface, thus improving the cleanliness of the product. The design of the two cleaning devices 500 enables simultaneous cleaning of both sides of the circuit board 3, improving cleaning efficiency and quality. Furthermore, the cleaning devices 500 are automated, reducing the need for manual cleaning, lowering labor intensity, and improving the automation level of the production line.

[0053] Furthermore, as a further improvement to the solution, the cleaning unit is also equipped with a vacuum suction mechanism. Specifically, as shown in the figure, an exhaust port 5111 is provided at the bottom of the first cavity 511. The vacuum suction mechanism includes a vacuum negative pressure machine and a dust collector. The dust collector is connected to the exhaust port 5111 through a pipeline. When the circuit board 3 passes through the second channel 530, the cleaning devices 500 on both sides of the circuit board 3 simultaneously clean both sides of the circuit board 3. When the cleaning brush 520 sweeps away foreign objects on the surface of the circuit board 3, the vacuum suction mechanism promptly sucks away the foreign objects and particles generated during the cleaning process, preventing these substances from causing secondary contamination to the circuit board 3. The combined use of the vacuum suction mechanism and the cleaning brush 520 can more effectively remove foreign objects and particles from the surface of the circuit board 3, improving the cleaning effect. In addition, the vacuum suction mechanism reduces the dust and foreign objects generated during the cleaning process, improves the working environment of the production line, and protects the health of the operators.

[0054] Furthermore, as shown in the figure, the two cleaning brushes 520 located on the same horizontal direction rotate in opposite directions. Specifically, the cleaning brush 520 near the inlet of the circuit board 3 rotates counterclockwise, while the cleaning brush 520 near the outlet of the circuit board 3 rotates clockwise. The cleaning brushes 520 remove large particles of dust from the surface of the circuit board 3, while the vacuum suction mechanism generates an upward airflow to prevent dust from settling back onto the circuit board 3. Combined with the vacuum suction mechanism, this effectively improves the foreign matter removal rate.

[0055] According to some embodiments of this application, a drip collection mechanism is provided below the conveyor belt 100 to prevent liquid from the circuit board 3 from dripping directly onto the equipment or the ground during the conveying process, thus preventing pollution of the production environment, corrosion of the equipment foundation, or potential safety hazards. Specifically, the drip collection mechanism includes a V-shaped guide plate and a collection tank 120, wherein the bottom of the V-shaped guide plate has a drain port, and the collection tank 120 is located at the bottom of the V-shaped guide plate and connected to the drain port. The V-shaped guide plate ensures smooth drainage, especially for liquids with a certain degree of viscosity.

[0056] According to some embodiments of this application, the board output end of the cleaning unit is connected to an automatic board retraction device, which can realize the automatic unloading and retraction of the circuit board 3, further improving the automation level of the equipment, increasing production efficiency and reducing the labor intensity of workers.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A continuous circuit board processing production line with foreign object protection function, characterized in that, include: The acid washing unit, alkaline washing unit, browning unit, and dry board unit are connected in sequence, and a water washing unit is provided between each of the acid washing unit, the alkaline washing unit, the browning unit, and the dry board unit; The washing unit and the adjacent processing unit are connected by a conveyor belt. A foreign object falling prevention device is installed above the conveyor belt. The foreign object falling prevention device includes a transparent protective cover. The transparent protective cover completely covers the connection between the washing unit and the adjacent processing unit. The transparent protective cover can prevent foreign objects from falling onto the circuit board on the conveyor belt.

2. The continuous circuit board processing production line with foreign object protection function according to claim 1, characterized in that, A locking mechanism is provided between the transparent protective cover and the conveyor belt. The locking mechanism includes a first magnet and a second magnet. The first magnet is disposed in one of the transparent protective cover and the conveyor belt, and the second magnet is disposed in the other of the transparent protective cover and the conveyor belt. The first magnet and the second magnet are magnetically connected.

3. The continuous circuit board processing production line with foreign object protection function according to claim 1, characterized in that, The transparent protective cover has a silicone sealing strip on the side facing the conveyor belt.

4. A continuous circuit board processing production line with foreign object protection function according to claim 1, characterized in that, One end of the transparent protective cover abuts against the outer wall of the washing unit, and the other end abuts against the outer wall of the adjacent processing unit.

5. A continuous circuit board processing production line with foreign object protection function according to claim 4, characterized in that, Both ends of the transparent protective cover are provided with silicone sealing strips, and the two silicone sealing strips are respectively provided on the same side as the water washing unit and the adjacent processing unit.

6. A continuous circuit board processing production line with foreign object protection function according to claim 1, characterized in that, It also includes a feeding unit located upstream of the pickling unit. The feeding unit includes a feeding device and a dust-adhesive device connected in sequence. The dust-adhesive device includes two dust-adhesive mechanisms arranged at intervals in the vertical direction. Each dust-adhesive mechanism includes multiple dust-adhesive rollers arranged at intervals along the circuit board conveying direction. There is a first channel between the two dust-adhesive mechanisms that allows the circuit board to pass through.

7. A continuous circuit board processing production line with foreign object protection function according to claim 6, characterized in that, The dust-adhesive device further includes a first body, which is provided with a dust-adhesive chamber. The dust-adhesive mechanism is disposed in the dust-adhesive chamber and is slidably connected to the first body. Both sides of the dust-adhesive chamber are provided with movable openings for the dust-adhesive mechanism to enter and exit the dust-adhesive chamber.

8. A continuous circuit board processing production line with foreign object protection function according to claim 7, characterized in that, The dust-adhesive mechanism comprises two dust-adhesive components, which extend along the axis of the dust-adhesive roller and are arranged to alternately enter and exit the dust-adhesive chamber. Each dust-adhesive component includes a first support, a dust-adhesive roller, and a first driving member. The first support is slidably connected to the first body, the dust-adhesive roller is mounted on the first support, and the dust-adhesive roller is rotatably connected to the first support. The first driving member is fixed to the first support and is drively connected to the dust-adhesive roller, enabling the first driving member to drive the dust-adhesive roller to rotate.

9. A continuous circuit board processing production line with foreign object protection function according to claim 1, characterized in that, It also includes a cleaning unit located downstream of the dry board unit. The cleaning unit includes two cleaning devices arranged opposite each other in the vertical direction. A second channel for the circuit board to pass through is provided between the two cleaning devices. The cleaning device includes a second body and a cleaning brush. The second body is provided with a first cavity. The first cavity has an opening on the side facing the circuit board. The cleaning brush is installed in the first cavity. Part of the structure of the cleaning brush can contact the surface of the circuit board through the opening of the first cavity. The cleaning brush is rotatably connected to the second body.

10. A continuous circuit board processing production line with foreign object protection function according to claim 9, characterized in that, The cleaning device also includes a vacuum suction mechanism. An exhaust port is provided at the bottom of the first cavity, and the vacuum suction mechanism is connected to the exhaust port through a pipeline.

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