A pickling equipment for PCB board production

Abstract

The present invention discloses a pickling device for PCB board production, comprising: two groups of first support frames arranged horizontally and fixedly placed on the ground, the front and rear sides of the two groups of first support frames being horizontally fixedly equipped with travel tracks, multiple groups of clamping mechanisms being slidably equipped on the travel tracks, and the clamping mechanisms on the two groups of travel tracks being mirror images; grabbing arms being fixedly placed at both ends of the first support frames; three groups of second support frames being horizontally arranged laterally and placed below the two groups of travel tracks, and a reaction chamber being fixedly installed above each group of the second support frames.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB production, and in particular to a pickling device for PCB board production. Background Art

[0002] A printed circuit board (PCB), or printed circuit board, is a crucial component in the electronics industry. Composed of an insulating base, connecting conductors, and pads for assembling and soldering electronic components, a PCB serves the dual purpose of conducting the circuit and insulating the base. It replaces complex wiring to achieve electrical connections between components within a circuit. This not only simplifies the assembly and soldering of electronic products, reducing the wiring workload compared to traditional methods and significantly alleviating worker labor, but also reduces overall size, lowers product costs, and improves the quality and reliability of electronic equipment.

[0003] During the production of PCBs, pickling is typically required to remove the oxide layer on the surface and enhance the aesthetics of the board. However, due to the varying shapes and number of layers of different PCBs, current pickling equipment can only meet the pickling requirements of a small fraction of PCBs. Furthermore, dust accumulates on the surface of PCBs during production and transportation. This accumulation of dust affects the circulation of the pickling solution, accelerating its use and ultimately increasing pickling costs during PCB production.

[0004] Therefore, it is necessary to provide a PCB production pickling equipment to solve the above problems. Summary of the Invention

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a pickling device for PCB board production, comprising:

[0006] Two groups of first support frames are horizontally arranged and fixed on the ground. The front and rear sides of the two groups of first support frames are horizontally fixedly equipped with travel tracks. Multiple groups of clamping mechanisms are slidably equipped on the travel tracks. The clamping mechanisms on the two groups of travel tracks are mirror images.

[0007] Grabbing arms are fixedly placed at both ends of the first support frame;

[0008] The second support frames are arranged in three groups horizontally and placed under the two groups of the travel tracks, and a reaction chamber is fixedly mounted on top of each group of the second support frames.

[0009] Further, as a preference, the two groups of reaction chambers on the left of the three groups of reaction chambers are fixedly equipped with flushing components, and the bottoms of the two groups of reaction chambers on this side are not provided with bottom plates, and liquid collecting funnels are fixedly equipped below them, and drying fans are fixedly equipped on the inner walls of the upper and lower ends of the reaction chambers on the right;

[0010] The connecting channel is fixedly assembled between the two groups of reaction chambers on the left.

[0011] Furthermore, preferably, the travel track includes:

[0012] A circulating track is fixedly mounted on the outside of the two sets of the first support frames, and a pickling track is fixedly mounted on the inside of the two sets of the first support frames. The circulating track is equal in length to the pickling track, and the planes of the left and right sides coincide with each other;

[0013] The conversion motor is provided with two groups in mirror image, which are respectively fixedly assembled between the left and right sides of the circulation track and the pickling track, and the conversion track is fixedly assembled on the output shaft of the conversion motor, and the inner plane of the conversion track coincides with the planes on the left and right sides of the circulation track and the pickling track.

[0014] Further, preferably, the pickling track includes:

[0015] The right fixed rail is respectively fixedly assembled on the inner side of the right first supporting frame;

[0016] The left fixed rail is respectively fixedly assembled on the inner side of the left first supporting frame;

[0017] There are two sets of rotating tracks, which are respectively rotatably assembled on the inner walls of the two groups of reaction chambers on the left;

[0018] The connecting rail is fixedly assembled at the center of the inner wall on the back side of the connecting channel.

[0019] Furthermore, preferably, the flushing assembly includes:

[0020] The liquid storage barrel is fixedly assembled in the middle of the second supporting frame in the middle part, and its upper part is coaxially fixed below the liquid collecting funnel. A liquid pipe is provided below it, and a spray shower is fixedly assembled on the other end of the liquid pipe. The spray shower is fixedly assembled on the inner wall of the top of the reaction chamber in the middle part.

[0021] Furthermore, as a preferred embodiment, a layer-changing motor is fixedly mounted on the back side of the middle reaction chamber, and a first transmission gear is fixedly mounted on the output shaft of the layer-changing motor;

[0022] The second transmission gear is placed between the traveling rails, coaxially fixedly assembled between the rotating rails, and meshed with the first transmission gear.

[0023] Furthermore, preferably, compared with the reaction chamber in the middle, a dustproof cover is fixedly mounted on the left side of the reaction chamber on the left, and a plurality of groups of cleaning brushes are arranged in the dustproof cover at intervals in the horizontal and longitudinal directions.

[0024] Furthermore, preferably, the clamping mechanism includes:

[0025] The electric slider is slidably assembled on the travel track, and a fixed block is fixedly assembled on its other plane. A clamping piece is slidably assembled on the other side of the fixed block. A clamping motor is embedded in the middle of the electric slider, and the output shaft of the clamping motor is fixedly assembled on the clamping piece.

[0026] Furthermore, preferably, a fixed suction cup is fixedly mounted on the front end of the grabbing arm, and a plurality of groups of micro suction cups are provided on the fixed suction cup.

[0027] Compared with the prior art, the present invention provides a pickling device for PCB production, which has the following beneficial effects:

[0028] In the present invention, a flexible clamping mechanism is provided to clamp PCB boards of different shapes, thereby improving the applicability of the equipment. A suitable travel track is provided to ensure the recycling of the clamping system while allowing the clamping mechanism holding the PCB board to rotate, thereby ensuring that both the front and back sides of the multi-layer PCB board can be effectively pickled. At the same time, three reaction chambers are provided to respectively pickle, rinse and dry the PCB boards. Liquid collection funnels are provided below the pickling and rinsing reaction chambers to effectively realize the circulation of the corresponding liquids. A cleaning brush is provided in front of the pickling chamber to effectively remove dust attached to the PCB boards during production and transportation, thereby preventing it from contaminating the pickling liquid and causing waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a pickling equipment for PCB board production;

[0030] Figure 2 This is a schematic diagram of the travel track structure of a pickling equipment used in PCB board production;

[0031] Figure 3 This is a schematic diagram of the partial cross-section structure of a pickling equipment for PCB board production;

[0032] Figure 4 This is a schematic diagram of the structure of a pickling equipment flushing component for PCB board production;

[0033] Figure 5 This is a schematic diagram of the clamping mechanism structure of a pickling equipment for PCB board production;

[0034] In the figure: 1. First support frame; 2. Travel track; 3. Grabbing arm; 4. Clamping mechanism; 5. Reaction chamber; 6. Second support frame; 7. Flushing assembly; 8. Drying fan; 9. Connecting channel; 10. Fixed suction cup; 11. Liquid collecting funnel; 21. Circulation track; 22. Pickling track; 23. Conversion track; 24. Right fixed track; 25. Connecting track; 26. Rotating track; 27. Conversion motor; 28. Left fixed track; 41. Electric slider; 42. Fixed block; 43. Clamping member; 44. Clamping motor; 71. Liquid bucket; 72. Liquid pipe; 73. Spray shower; 74. Layer changing motor; 75. First transmission gear; 76. Second transmission gear; 77. Dust cover; 78. Cleaning brush. Implementation Method

[0035] See also Figures 1 to 5 The present invention provides a pickling device for PCB board production, comprising:

[0036] Two first support frames 1 are horizontally arranged and fixed on the ground. Travel rails 2 are fixedly mounted on the front and rear sides of the two first support frames 1. Multiple clamping mechanisms 4 are slidably mounted on the travel rails 2. The clamping mechanisms 4 on the two travel rails 2 are mirror images.

[0037] The grabbing arms 3 are fixedly placed at both ends of the first support frame 1;

[0038] The second support frames 6 are arranged in three groups horizontally and placed under the two groups of the travel rails 2, and a reaction chamber 5 is fixedly mounted on each group of the second support frames 6;

[0039] As a preferred embodiment, the distance between the clamping mechanisms 4 on the same side is equal to the center distance between the two groups of reaction chambers 5 (assuming that the distance is L). All clamping mechanisms 4 slide synchronously along their tracks, and when they slide a distance L, they will come to a standstill at T. When the leftmost clamping mechanism 4 moves 2L from its initial position, the group of clamping mechanisms 4 reaches the center of the left reaction chamber 5. When working, the left grabbing arm 3 horizontally places the PCB board to be processed between the two groups of clamping mechanisms 4 on the left, and the horizontal center plane of the PCB board to be processed coincides with the horizontal center plane of the clamping mechanism 4, driving The two groups of clamping mechanisms 4 are moved to clamp the PCB to be processed, the left grabbing arm 3 is released and returns to its initial position, and the clamping mechanism 4 starts to slide to the right along the travel track 2. When the group of clamping mechanisms 4 has run a distance L, the left grabbing arm 3 is started and the PCB to be processed is placed again. The clamping mechanism 4 passes through the three groups of reaction chambers 5 in sequence. The three groups of reaction chambers 5 perform pickling treatment on the PCB to be processed on the clamping mechanism 4 in turn. When the group runs to the original initial position of the right clamping mechanism 4, the pickling work is completed. The right grabbing arm 3 grabs the processed PCB and enters the next link.

[0040] Furthermore, the two groups of reaction chambers 5 on the left of the three groups of reaction chambers 5 are fixedly equipped with a flushing assembly 7, and the bottom of the two groups of reaction chambers 5 on this side is not provided with a bottom plate, and a liquid collecting funnel 11 is fixedly installed below them. Drying fans 8 are fixedly installed on the inner walls of the upper and lower ends of the reaction chamber 5 on the right side;

[0041] The connecting channel 9 is fixedly assembled between the two groups of reaction chambers 5 on the left side;

[0042] As a preferred embodiment, the three groups of reaction chambers 5 are, from left to right, a pickling chamber, a rinsing chamber, and a drying chamber. When the PCB board to be processed moves to the pickling chamber, the pickling chamber will spray pickling liquid to wash away the oxide layer on the surface of the PCB board and enhance its surface aesthetics. After the pickling is completed, the PCB board will enter the rinsing chamber, which will spray clean water to treat the residual pickling liquid on the surface of the PCB board to prevent corrosion of other parts. After the rinsing is completed, the PCB board enters the drying chamber. The drying fan 8 in the drying chamber will accelerate the evaporation of residual water on the surface of the PCB board. The PCB board is kept clean, and the time T for the clamping mechanism 4 to stay is the maximum of the pickling completion time t1, the rinsing completion time t2, and the drying completion time t3. The liquid collecting funnel 11 installed below the pickling chamber and the rinsing chamber can recover the liquid sprayed from the upper part thereof for recycling, thereby reducing the pickling cost. The right side of the connecting channel 9 is higher than the left side, which prevents the residual pickling liquid on the surface of the PCB board after pickling from dripping onto the running line, and at the same time allows the fallen pickling liquid to return to the pickling chamber under the influence of gravity for reuse, thereby further saving costs.

[0043] Furthermore, the travel track 2 includes:

[0044] The circulation track 21 is fixedly assembled on the outside of the two groups of the first support frames 1, and the pickling track 22 is fixedly assembled on the inside of the two groups of the first support frames 1. The circulation track 21 and the pickling track 22 are of equal length and the planes of the left and right sides coincide with each other;

[0045] The conversion motor 27 is provided in two mirror images and is fixedly mounted between the circulation track 21 and the left and right sides of the pickling track 22. The conversion track 23 is fixedly mounted on the output shaft of the conversion motor 27. The inner plane of the conversion track 23 coincides with the planes on the left and right sides of the circulation track 21 and the pickling track 22.

[0046] As a preferred embodiment, the clamping mechanism 4 on the circulation track 21 moves from right to left, and the clamping mechanism 4 on the pickling track 22 moves from left to right, so that the clamping mechanism 4 forms a cycle, and a limiter is provided on the conversion track 23, so that the left limit position and the right limit position of the clamping mechanism 4 are respectively the center positions of the conversion tracks 23 on both sides, and in the initial state, the clamping mechanism 4 is stopped at the left and right limit positions, and the left limit position is the initial position. The clamping mechanism 4 at this position clamps the PCB board to be processed and moves to the right. When it runs to the right limit position, it stops at its left limit position. During the T time, the right grabbing arm 3 clamps the pickling-finished PCB board away, and the right conversion motor 27 is started to rotate the conversion track 23 and the clamping mechanism 4 thereon by 180°, so that the clamping mechanism 4 is connected to the circulation track 21, and slides to the left along the circulation track 21 in subsequent work. When it slides to the left limit position, during the T time it stays, the left conversion motor 27 is started to rotate the conversion track 23 by 180°, driving the clamping mechanism 4 to return to its original initial position, and clamping the PCB board to be processed. When its residence time is up, it slides to the right to start the next cycle.

[0047] Furthermore, the pickling track 22 includes:

[0048] The right fixed rail 24 is fixedly assembled on the inner side of the right first support frame 1;

[0049] The left fixed rail 28 is fixedly assembled on the inner side of the left first support frame 1;

[0050] There are two sets of rotating tracks 26, which are respectively rotatably assembled on the inner walls of the two groups of reaction chambers 5 on the left side;

[0051] The connecting track 25 is fixedly assembled at the center of the back inner wall of the connecting channel 9;

[0052] As a preferred embodiment, the right fixed rail 24, the left fixed rail 28 and the connection points of the connecting rail 25 and the rotating rail 26 are all arc-shaped surfaces that fit with the rotating rail 26, so that the rotating rail 26 is not affected during the rotation process, and the right fixed rail 24 and the left fixed rail 28 are not of equal length. The two sets of rotating rails 26 correspond to the pickling chamber and the rinsing chamber in the reaction chamber 5 respectively.

[0053] Furthermore, the flushing assembly 7 includes:

[0054] A liquid storage barrel 71 is fixedly mounted in the middle of the second support frame 6, and its upper portion is coaxially fixed below the liquid collecting funnel 11. A liquid passage 72 is provided below the liquid passage 72, and a spray head 73 is fixedly mounted at the other end of the liquid passage 72. The spray head 73 is fixedly mounted on the inner wall of the top end of the reaction chamber 5 in the middle;

[0055] As a preferred embodiment, the liquid storage barrel 71 below the pickling chamber and the rinsing chamber is respectively filled with pickling liquid and clean water. When the PCB board runs into the pickling chamber or the rinsing chamber, the liquid storage barrel 71 is started, and the pickling liquid or clean water therein is sprayed onto the PCB board along the liquid pipe 72 through the spray shower 73 to treat it. At the same time, the sprayed pickling liquid or clean water returns to the corresponding liquid storage barrel 71 along the liquid collecting funnel 11.

[0056] Furthermore, a layer-changing motor 74 is fixedly mounted on the back side of the middle reaction chamber 5, and a first transmission gear 75 is fixedly mounted on the output shaft of the layer-changing motor 74;

[0057] The second transmission gear 76 is placed between the travel rails 2, coaxially fixedly assembled between the rotating rails 26, and meshed with the first transmission gear 75;

[0058] As a preferred embodiment, if the PCB board to be processed has a multi-layer wiring structure (both the front and back layers of the PCB board are wiring layers), when the PCB board runs into the pickling chamber or the rinsing chamber, the spray shower 73 sprays the corresponding liquid at the same time, and the layer changing motor 74 is started and, driven by the first transmission gear 75 and the second transmission gear 76, drives the rotating track 26 to rotate. At the same time, the clamping mechanism 4 resting on it will drive the PCB board thereon to rotate synchronously, so that the front and back layers of the PCB board can be evenly sprayed.

[0059] Furthermore, compared with the reaction chamber 5 in the middle, a dust cover 77 is fixedly mounted on the left side of the reaction chamber 5 on the left side, and multiple groups of cleaning brushes 78 are arranged in the dust cover 77 at intervals in the horizontal and vertical directions.

[0060] As a preferred embodiment, since a certain amount of dust adheres to the surface of PCB boards during production and transportation, the accumulation of this dust will affect the circulation of the pickling solution, thereby accelerating the use of the pickling solution and further increasing the pickling cost during the PCB board production process. Therefore, a dustproof shell 77 is provided on the left side of the pickling chamber. Before the PCB boards to be processed enter the pickling chamber, multiple sets of cleaning brushes 78 inside the dustproof shell remove dust from their surfaces.

[0061] Furthermore, the clamping mechanism 4 includes:

[0062] An electric slider 41 is slidably mounted on the travel track 2, with a fixed block 42 fixedly mounted on the other surface thereof. A clamping member 43 is slidably mounted on the other side of the fixed block 42. A clamping motor 44 is embedded in the middle of the electric slider 41, and the output shaft of the clamping motor 44 is fixedly mounted on the clamping member 43.

[0063] As a preferred embodiment, the electric slider 41 is provided with a self-locking mechanism. When it stops on the travel track 2, the self-locking mechanism is activated to ensure that the electric slider 41 is in a stationary state and prevent it from shifting in position under interference, thereby affecting the pickling result. The clamping member 43 is a flexible clamping mechanism, so it can adapt to the clamping work of PCB boards of different shapes. At the same time, the clamping motor 44 rotates forward to clamp and reverses to release. The clamping motors 44 of the two corresponding clamping mechanisms 4 run synchronously to ensure the accurate position of the PCB board.

[0064] Furthermore, the front end of the grabbing arm 3 is fixedly equipped with a fixed suction cup 10, and the fixed suction cup 10 is provided with multiple groups of micro suction cups;

[0065] As a preferred embodiment, there are many irregular vias on different PCB boards. The presence of these vias will greatly reduce the suction force of the suction cup. The provision of multiple groups of micro suction cups can avoid the influence of vias on the suction force of the suction cup to a great extent.

[0066] The specific implementation includes the following steps: the left grabbing arm 3 horizontally places the PCB to be processed between the two left sets of clamping mechanisms 4, with the horizontal center plane of the PCB to be processed coinciding with the horizontal center plane of the clamping mechanisms 4. The two sets of clamping mechanisms 4 are driven to clamp the PCB to be processed. The left grabbing arm 3 is released and returns to its initial position. The clamping mechanisms 4 start to slide to the right along the travel track 2. After the set of clamping mechanisms 4 has traveled a distance L, the left grabbing arm 3 is activated and the PCB to be processed is placed again. The clamping mechanisms 4 sequentially pass through three sets of reaction chambers 5. The three reaction chambers 5 sequentially perform pickling treatment on the PCB to be processed on the clamping mechanisms 4. When the set of reaction chambers 5 returns to the original initial position of the right clamping mechanism 4, the pickling process is completed. The right grabbing arm 3 then grabs the processed PCB and enters the next step.

[0067] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pickling device for PCB production, characterized by: include: Two groups of first support frames (1) are horizontally arranged and fixedly placed on the ground. Travel rails (2) are horizontally fixedly mounted on the front and rear sides of the two groups of first support frames (1). Multiple groups of flexible clamping mechanisms (4) are slidably mounted on the travel rails (2). The clamping mechanisms (4) on the two groups of travel rails (2) correspond to each other in a mirror image. Grabbing arms (3) are fixedly placed at both ends of the first support frame (1); The second support frames (6) are arranged in three groups horizontally and placed below the two groups of travel rails (2), and a reaction chamber (5) is fixedly mounted above each group of the second support frames (6); The two groups of reaction chambers (5) on the left of the three groups of reaction chambers (5) are fixedly equipped with a flushing assembly (7), and the bottom of the two groups of reaction chambers (5) on this side is not provided with a bottom plate, and a liquid collecting funnel (11) is fixedly equipped below the bottom. Drying fans (8) are fixedly equipped on the inner walls of the upper and lower ends of the reaction chamber (5) on the right, and a connecting channel (9) is fixedly equipped between the two groups of reaction chambers (5) on the left; The traveling track (2) comprises: A circulation track (21) is fixedly mounted on the outside of the two groups of the first support frames (1), and a pickling track (22) is fixedly mounted on the inside of the two groups of the first support frames (1). The circulation track (21) and the pickling track (22) are of equal length and the planes of the left and right sides coincide with each other; The conversion motor (27) is provided with two sets of mirror images, which are respectively fixedly assembled between the left and right sides of the circulation track (21) and the pickling track (22), and the conversion track (23) is fixedly assembled on the output shaft of the conversion motor (27), and the inner side plane of the conversion track (23) is respectively coincident with the planes on the left and right sides of the circulation track (21) and the pickling track (22); The pickling track (22) comprises: The right fixed rail (24) is fixedly assembled on the inner side of the right first support frame (1); The left fixed rail (28) is fixedly assembled on the inner side of the left first support frame (1); There are two sets of rotating tracks (26), which are respectively rotatably mounted on the inner walls of the two groups of reaction chambers (5) on the left side; The connecting track (25) is fixedly assembled at the center of the inner wall of the back side of the connecting channel (9).

2. A pickling equipment for PCB production according to claim 1, characterized in that: The flushing assembly (7) comprises: The liquid storage barrel (71) is fixedly mounted in the middle of the second support frame (6) in the middle, and its upper portion is coaxially fixed below the liquid collecting funnel (11), and a liquid passage pipe (72) is provided below it, and a spray shower (73) is fixedly mounted at the other end of the liquid passage pipe (72), and the spray shower (73) is fixedly mounted on the inner wall of the top end of the reaction chamber (5) in the middle.

3. A pickling equipment for PCB production according to claim 2, characterized in that: A layer-changing motor (74) is fixedly mounted on the back side of the middle reaction chamber (5), and a first transmission gear (75) is fixedly mounted on the output shaft of the layer-changing motor (74); The second transmission gear (76) is placed between the travel rails (2), is coaxially fixedly assembled between the rotation rails (26), and is meshed with the first transmission gear (75).

4. A pickling device for PCB production according to claim 3, characterized in that: Compared with the reaction chamber (5) in the middle, a dustproof shell (77) is fixedly mounted on the left side of the reaction chamber (5) on the left side, and a plurality of cleaning brushes (78) are arranged in the dustproof shell (77) at intervals in the horizontal and longitudinal directions.

5. The pickling equipment for PCB production according to claim 1, characterized in that: The clamping mechanism (4) comprises: An electric slider (41) has one plane slidably mounted on the travel track (2), and a fixed block (42) is fixedly mounted on the other plane opposite thereto. A flexible clamping member (43) is slidably mounted on the other side of the fixed block (42). A clamping motor (44) is embedded in the middle of the electric slider (41), and an output shaft of the clamping motor (44) is fixedly mounted on the clamping member (43).

6. The pickling equipment for PCB production according to claim 1, characterized in that: A fixed suction cup (10) is fixedly mounted on the front end of the grabbing arm (3), and a plurality of groups of micro suction cups are arranged on the fixed suction cup (10).

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