PCB board spraying device

Abstract

The utility model relates to a kind of PCB board spraying device, to solve the technical problems that the nozzle spraying width of existing PCB board spraying device is mostly fixed setting, when PCB board specification changes, spraying width is easy to exceed plate body range and lead to coating waste, or not completely cover plate body and affect the spraying effect, including spray chamber and discharge frame, the left and right ends of discharge frame are inserted and slidingly connected with movable frame, the bottom end of movable frame is fixedly connected with sliding block, slidingly connected with sliding frame between the two sliding rails of spray chamber inner side, the surface of sliding frame is equipped with left and right two clamping seats, the utility model is fixed when clamping seat is clamped to different size PCB board, sliding block and the cooperation of limiting sliding groove drive movable frame synchronous sliding, automatically adjust the effective spraying width of discharge frame, make it with PCB board size adaptation, realize the integration of clamping and spraying width adjustment, substantially reduce coating waste, while improve production change efficiency, adapt to the spraying demand of the spraying of the PCB board of diversification specification.

Description

Technical Field

[0001] This utility model relates to the field of PCB board spraying technology, specifically to a PCB board spraying device. Background Technology

[0002] In the field of electronics manufacturing, the PCB board soldering process is a key step to ensure the stable connection of electronic components. Flux spraying, as a core pretreatment step before soldering, plays a role in removing the oxide layer on the PCB board pads and the surface of electronic component leads, reducing the soldering temperature, and improving the solder fluidity, thereby ensuring the reliability and stability of the solder joint.

[0003] Existing PCB board coating equipment typically uses nozzles with fixed spray widths. When PCB board specifications change, the spray width can easily exceed the board's surface area, leading to paint waste or incomplete coverage and affecting the coating effect. Manual adjustment is not only cumbersome and time-consuming but also prone to errors, further exacerbating paint loss and reducing production changeover efficiency. This makes it difficult to meet the high-efficiency, energy-saving coating requirements for diverse PCB board specifications. Therefore, a new technical solution is proposed to address this issue. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a PCB board spraying device to solve the technical problem that the spraying width of the nozzles in the existing PCB board spraying devices is mostly fixed. When the PCB board specifications change, the spraying width is easy to exceed the board body range, resulting in paint waste, or the board body is not completely covered, affecting the spraying effect.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a PCB board spraying device is designed, including a spray chamber and a discharge frame. Movable frames are inserted and slidably connected to both ends of the discharge frame. A slider is fixedly connected to the bottom end of the movable frame. A slide is slidably connected between two sliding rails on the inner side of the spray chamber. The surface of the slide is provided with two left and right clamping seats. The outer wall of the clamping seat is provided with a limiting groove. The slider slides laterally on the surface of the limiting groove.

[0006] In this solution, when the clamping base holds and fixes PCBs of different sizes, the movable frame slides synchronously through the cooperation of the slider and the limiting groove, automatically adjusting the effective spraying width of the discharge frame to match the PCB size. This structure eliminates the need for additional manual adjustment of the spraying components; only the PCBs need to be clamped normally. It integrates clamping and spraying width adjustment, significantly reducing paint waste, improving production changeover efficiency, and adapting to the spraying needs of diverse PCB specifications.

[0007] Preferably, an electric slide rail is fixedly connected to the top inner side of the spray chamber, and a support frame is fixedly connected to the bottom of the sliding part of the electric slide rail. The bottom of the support frame is welded to the discharge frame, and the bottom of the discharge frame is provided with a plurality of nozzles in a linear array.

[0008] In practical applications, after the electric slide rail is activated, its sliding components drive the support frame and the discharge frame to move laterally along the PCB board at a uniform speed, while the linear nozzles at the bottom of the discharge frame simultaneously spray out the coating. This design ensures a uniform spraying path through automated movement, and the linear nozzles cover all areas without dead corners, avoiding the offset errors of manual operation and improving spraying efficiency and coating uniformity.

[0009] Preferably, the bottom of the clamping seat is fixedly connected with three sleeve blocks, which are respectively located on the surface of three crossbeams on the slide and slidably connected to the crossbeams. The clamping surface of the clamping seat is provided with a soft rubber strip to prevent excessive compression, and the side wall edge of the slide is provided with a positioning block.

[0010] In practical applications, when the clamping seat moves, the sleeve block slides along the slide beam to achieve smooth adjustment; the soft rubber strip increases friction, buffers the clamping force, and avoids damaging the edges of the PCB board; when the slide is pushed into the spray chamber, the positioning block engages with the slide rail groove to fix the slide and prevent spraying displacement. The overall structure takes into account adaptability, protection, and stability, and is easy to operate.

[0011] Preferably, a lifting block is slidably connected to the top of the discharge frame, a through channel is provided between the upper and lower surfaces of the lifting block, and a flexible hose for conveying paint is provided between the top of the lifting block and the storage tank outside the spray chamber.

[0012] In practical applications, the paint in the storage tank is conveyed to the discharge frame via a hose and a lifting block. When the width of the discharge frame is adjusted, the lifting block slides synchronously to change the internal space of the discharge frame. This allows for real-time balance of paint pressure, improving the stability of spraying quality.

[0013] Preferably, the lifting block is provided with diagonal rods between itself and the movable frames on the left and right sides, and the two ends of the diagonal rods are rotatably connected to the lifting block and the movable frames respectively through hinge seats.

[0014] In practical applications, when the movable frame slides along the discharge frame to adjust its width, it drives the lifting block to move up and down via a diagonal rod: when the movable frame extends, the lifting block descends to reduce the space; when it retracts, the lifting block rises to expand the space. This mechanical linkage requires no manual adjustment, automatically adapts to changes in space, ensures stable paint pressure within the discharge frame, avoids uneven coating, and meets the requirements for high-efficiency spraying.

[0015] Preferably, a storage frame is fixedly connected between the crossbeams of the carriage, and a pull rod is slidably connected to the inner side of the storage frame. One end of the pull rod, which passes through the crossbeam, is fixedly connected to a handle.

[0016] In practical applications, pulling the handle causes the pull rod to slide along the storage frame, moving the clamping base to hold the PCB board. Operation requires only pulling the handle, eliminating the need for complex tools, enabling quick adjustment and fixation of the clamping base, improving changeover efficiency, and adapting to diverse PCB board specifications.

[0017] Preferably, the bottom of the pull rod is fixedly connected with several helical teeth, and the side wall of the slide beam below the pull rod is fixedly connected with a limiting spring.

[0018] In practical applications, when the pull rod is pulled outward, the helical teeth pass normally through the limiting spring; after the pull rod is released, the limiting spring resets and engages with the gap between the helical teeth, fixing the position of the pull rod and thus locking the clamping seat. This purely mechanical locking structure requires no electricity, provides reliable locking, and has low maintenance costs.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting the discharge frame and the lower slide to correspond to each other, allows the movable frame to slide synchronously through the cooperation of the slider and the limiting slide groove when clamping and fixing PCB boards of different sizes. This automatically adjusts the effective spraying width of the discharge frame to match the size of the PCB board. This structure eliminates the need for additional manual adjustment of the spraying components; only the PCB board needs to be clamped normally. It integrates clamping and spraying width adjustment, significantly reducing paint waste, improving production changeover efficiency, and adapting to the spraying needs of diverse PCB board specifications.

[0020] 2. This utility model features a sliding lifting block at the top of the discharge frame. When the movable frame slides to adjust the spray width, the lifting block rises and falls synchronously via a diagonal rod, automatically adapting to changes in the internal space of the discharge frame. When the movable frame extends, the lifting block lowers to reduce the space; when it retracts, the lifting block rises to expand the space. This effectively counteracts the impact of changes in spray width on internal pressure, ensuring stable spray pressure at the nozzle and effectively preventing uneven coating thickness caused by pressure fluctuations, thus guaranteeing consistent spray quality. Attached Figure Description

[0021] Figure 1 This is an external schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the carriage structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the discharge frame of this utility model; Figure 6 This is a schematic cross-sectional view of the pull rod of this utility model; Figure 7This is a schematic diagram of the positioning block structure of this utility model; In the diagram: 1. Machine casing; 2. Spray chamber; 201. Inlet; 202. Sliding rail; 3. Carriage; 301. Sleeve block; 302. Positioning block; 4. Clamping seat; 401. Limiting groove; 5. Storage frame; 6. Pull-out rod; 601. Helical tooth; 602. Handle; 603. Synchronizing rod; 7. Limiting spring; 8. Electric slide rail; 9. Support frame; 10. Discharge frame; 1001. Nozzle; 11. Movable frame; 111. Slider; 12. Diagonal bar; 13. Lifting block; 14. Storage box. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: A PCB board spraying device, see Figures 1 to 7 The system includes a spray chamber 2 and a discharge frame 10. The spray chamber 2 is located inside the machine housing 1 and has an inlet 201. The left and right ends of the discharge frame 10 are inserted into and slidably connected to movable frames 11. The bottom end of the movable frames 11 is fixedly connected to a slider 111. A slide frame 3 is slidably connected between two sliding rails 202 on the inner side of the spray chamber 2. The surface of the slide frame 3 is provided with two left and right clamping seats 4. The bottom of the clamping seats 4 is fixedly connected to three sleeve blocks 301. The three sleeve blocks 301 are respectively located on the surface of three crossbeams on the surface of the slide frame 3 and are slidably connected to the crossbeams. The outer wall of the clamping seat 4 is provided with a limiting groove 401. The slider 111 slides laterally on the surface of the limiting groove 401.

[0023] In the above technical solution, the PCB board is placed on the clamping seat 4 during use. The two clamping seats 4 are adjusted to slide along the crossbeam of the slide 3 until the clamping seats 4 are in contact with both sides of the PCB board and fixed. During this process, the sliding of the clamping seats 4 will drive the outer wall limiting slide groove 401 to move synchronously. The slider 111 in the slide groove will then pull the movable frame 11 to extend and retract at both ends of the discharge frame 10. When the size of the PCB board increases, the movable frame 11 extends outward to expand the effective spraying width of the discharge frame 10. When the size decreases, it retracts inward to reduce the width, so that the coverage area of ​​the nozzle 1001 at the bottom of the discharge frame 10 matches the size of the PCB board. This linkage structure eliminates the need for manual adjustment of the spraying width, realizing an integrated operation of clamping and fixing and width adaptation. It effectively avoids waste of paint caused by exceeding the board's range, while improving production changeover efficiency and adapting to the spraying needs of PCB boards of various specifications.

[0024] It should be noted that the lengths of the clamping seat 4 and the limiting slide 401 are designed so that when the slide 3 slides out of the spray chamber 2 to facilitate the replacement of the PCB board, the slider 111 at the bottom of the movable frame 11 is still inside the limiting slide 401, thus ensuring that it can always move with the clamping seat 4 and ensuring the adjustment of the spraying width.

[0025] Specifically, a lifting block 13 is slidably connected to the top of the discharge frame 10. A through channel is provided between the upper and lower surfaces of the lifting block 13. A flexible hose for conveying paint is provided between the top of the lifting block 13 and the storage box 14 outside the spray chamber 2. An inclined rod 12 is provided between the lifting block 13 and the movable frame 11 on the left and right sides. The two ends of the inclined rod 12 are rotatably connected to the lifting block 13 and the movable frame 11 respectively through hinge seats.

[0026] In the above technical solution, the paint in the storage tank 14 is driven by a hose and a matching pump and transported to the inside of the discharge frame 10 through the channel of the lifting block 13. When the movable frame 11 slides outward along the discharge frame 10, the internal space of the discharge frame 10 increases and the spraying pressure decreases. Therefore, the movable frame 11 pulls the lifting block 13 downward along the top of the discharge frame 10 through the diagonal rod 12, reducing the space inside the discharge frame 10 that can hold the paint, thus increasing the spraying pressure. When the movable frame 11 retracts inward, the internal space of the discharge frame 10 decreases and the spraying pressure increases. Therefore, the diagonal rod 12 pushes the lifting block 13 upward to expand the internal space, thus decreasing the spraying pressure. This counteracts the influence of changes in spraying width on the internal paint pressure in real time, ensuring that the spraying pressure at the nozzle 1001 remains stable, effectively avoiding uneven coating thickness caused by pressure fluctuations, and ensuring consistent spraying quality for PCBs of different specifications.

[0027] It should be noted that the installation position of the storage tank 14 is flexible and unrestricted. It can be placed according to the available space inside the machine casing 1, such as the side or top unused area of ​​the spray chamber 2, making the overall structure of the device more compact and reducing the external space occupation; or it can be installed in a suitable position outside the machine casing 1, such as on the side or near the operating table, to facilitate quick material addition and daily maintenance of the storage tank 14. Because the storage tank 14 is connected to the lifting block 13 through a flexible hose, the flexible installation method will not affect the normal delivery of paint.

[0028] Furthermore, a storage frame 5 is fixedly connected between the crossbeams of the slide 3, and a pull rod 6 is slidably connected to the inner side of the storage frame 5. One end of the pull rod 6 passes through the crossbeam and is fixedly connected to the handle 602. A synchronizing rod 603 is provided between the pull rod 6 and the sleeve block 301 at the bottom of the clamping seat 4. The two ends of the synchronizing rod 603 are rotatably connected to the sleeve block 301 and the pull rod 6 respectively through hinge seats. Several helical teeth 601 are fixedly connected to the bottom of the pull rod 6, and a limiting spring piece 7 is fixedly connected to the side wall of the crossbeam of the slide 3 below the pull rod 6. When clamping the PCB board, pull the handle 602 outward to slide the pull rod 6 along the storage frame 5. At this time, the helical teeth 601 at the bottom of the pull rod 6 pass normally through the limiting spring 7. After the clamping seat 4 is adjusted into place, release the handle 602 directly. The limiting spring 7 engages between the adjacent helical teeth 601, fixing the position of the pull rod 6. This indirectly restricts the sliding of the clamping seat 4 through the linkage between the pull rod 6 and the clamping seat 4, ensuring the clamping of the PCB board. After spraying, simply pull down the limiting spring 7 to quickly release the limitation on the pull rod 6. This structure achieves quick fixing and unlocking of the clamping seat 4 through a purely mechanical locking method, without the need for complex locking components, making it convenient to operate and low in maintenance costs.

[0029] It is worth noting that, such as Figure 3 As shown, an electric slide rail 8 is fixedly connected to the top inner side of the spray chamber 2. A support frame 9 is fixedly connected to the bottom of the sliding part of the electric slide rail 8. The bottom of the support frame 9 is welded to the discharge frame 10. The bottom of the discharge frame 10 has several nozzles 1001 arranged in a linear array. During spraying, the sliding part of the electric slide rail 8 drives the support frame 9 and the discharge frame 10 at the bottom to move laterally and uniformly along the PCB board surface. The nozzles 1001 in the linear array at the bottom of the discharge frame 10 simultaneously spray atomized paint, achieving uniform coverage of the PCB board surface. The automated movement of the electric slide rail 8 replaces traditional manual operation, which not only improves the accuracy of the spraying path, but also adapts to the drying requirements of different paints by adjusting the slide rail movement speed. At the same time, the linear array nozzles 1001 design ensures that the paint coverage is without dead corners, further improving the spraying uniformity and work efficiency, and adapting to the production needs of batch PCB boards.

[0030] It is worth describing that the clamping surface of the clamping seat 4 is provided with a soft rubber strip to prevent excessive compression, and a positioning block 302 is provided at the edge of the side wall of the slide 3. The positioning block 302 is a smooth hemispherical shape, and a groove is provided at the corresponding position of the sliding rail 202 to accommodate the positioning block 302. The positioning block 302 is inserted into the groove, thereby fixing the slide 3 during the spraying process. After the spraying is completed, the slide 3 can be manually pulled out. During the pulling process, the positioning block 302 will automatically compress back to the inside of the slide 3. The positioning structure is simple, takes into account both the protection of the PCB board and the fixing of the slide 3. The structure is simple and highly reliable, which greatly reduces the difficulty and cost of equipment maintenance.

[0031] It should be further explained that the machine casing 1 in this device has a conventional casing structure for sprayers. Its main function is to provide protection and installation support for the internal spray chamber 2 and related spraying components, preventing external impurities from interfering with the spraying operation, while ensuring the overall structural stability of the equipment. The design meets the conventional usage requirements of sprayers. Besides the spray chamber 2 and the components involved in this utility model, such as the slide 3, clamping seat 4, and discharge frame 10, the machine casing 1 contains power supply, wiring, paint recovery, and other auxiliary equipment. These are not technical solutions that this utility model needs to protect, and this utility model does not modify or redesign these existing devices, so they do not need to be described in detail. The size of the spray chamber 2 is not limited by a fixed dimension. It can be flexibly set in a suitable location inside the machine according to the internal space layout of the machine casing 1, the maximum PCB board size that can be adapted, and the actual spraying efficiency requirements. This ensures sufficient operating space during the spraying process, avoids interference between components, and can adapt to the modification and installation of sprayers of different specifications. The core innovation of this utility model always focuses on the linkage design of the spraying components inside the spray chamber 2, ensuring a clear focus on key technologies.

[0032] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0033] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A PCB board spraying device, comprising a spray chamber (2) and a discharge frame (10), characterized in that, The left and right ends of the discharge frame (10) are both inserted and slidably connected to movable frames (11). The bottom end of the movable frame (11) is fixedly connected to a slider (111). A slide frame (3) is slidably connected between two sliding rails (202) on the inner side of the spray chamber (2). The surface of the slide frame (3) is provided with two left and right clamping seats (4). The outer side wall of the clamping seat (4) is provided with a limiting slide groove (401). The slider (111) slides laterally on the surface of the limiting slide groove (401).

2. The PCB board spraying device as described in claim 1, characterized in that, An electric slide rail (8) is fixedly connected to the top inner side of the spray chamber (2). A support frame (9) is fixedly connected to the bottom of the sliding part of the electric slide rail (8). The bottom of the support frame (9) is welded to the discharge frame (10). The bottom of the discharge frame (10) is provided with a number of nozzles (1001) in a linear array.

3. The PCB board spraying device as described in claim 1, characterized in that, The bottom of the clamping seat (4) is fixedly connected with three sleeve blocks (301). The three sleeve blocks (301) are respectively located on the surface of the three crossbeams on the surface of the slide (3) and are slidably connected to the crossbeams. The clamping surface of the clamping seat (4) is provided with soft rubber strips to prevent excessive compression. The side wall edge of the slide (3) is provided with positioning blocks (302).

4. The PCB board spraying device as described in claim 1, characterized in that, The top of the discharge frame (10) is slidably connected to a lifting block (13), and a through channel is provided between the upper and lower surfaces of the lifting block (13). A flexible hose for conveying paint is provided between the top of the lifting block (13) and the storage box (14) outside the spray chamber (2).

5. The PCB board spraying device as described in claim 4, characterized in that, The lifting block (13) is provided with a diagonal rod (12) between it and the movable frame (11) on the left and right sides. The two ends of the diagonal rod (12) are rotatably connected to the lifting block (13) and the movable frame (11) respectively through hinge seats.

6. The PCB board spraying device as described in claim 1, characterized in that, A storage frame (5) is fixedly connected between the crossbeams of the carriage (3). A pull rod (6) is slidably connected to the inner side of the storage frame (5). One end of the pull rod (6) passes through the crossbeam and is fixedly connected to the handle (602).

7. The PCB board spraying device as described in claim 6, characterized in that, The bottom of the pull rod (6) is fixedly connected with several helical teeth (601), and the side wall of the crossbeam of the slide (3) below the pull rod (6) is fixedly connected with a limiting spring (7).

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