A high-precision zinc spraying device for a circuit board

Abstract

The utility model discloses a high accuracy circuit board zinc spraying processing device, including the processing station and setting in the processing station bottom's support box, still include preheating box, the top of preheating box is installed in infrared preheating module in parallel, spray coating box body, spray coating box body sets up the processing station top of preheating box one side, just the top of spray coating box body is installed electric telescopic handle, and the output of electric telescopic handle extends to the inside of spray coating box body and is connected with the top of movable support plate shield, just the movable support plate top of shield inboard evenly installs micro - electric telescopic handle, and the output of every micro - electric telescopic handle all extends to the below of movable support plate and is connected with the spray head. The utility model accurate control micro - electric telescopic handle, drive the spray head adjustment height, ensure that every spray head and the distance of the surface of the circuit board to be processed are consistent. Effectively solved the problem of uneven spraying caused by the uneven surface of the circuit board, improved the spraying quality and precision.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, specifically a high-precision circuit board zinc spraying processing device. Background Technology

[0002] With the rapid development of the electronics and information industry, circuit boards, as core components of electronic devices, face increasingly stringent performance requirements. Zinc spraying, a key process for enhancing the corrosion resistance, conductivity, and mechanical strength of circuit boards, is widely used in high-end fields such as high-frequency communication, automotive electronics, and industrial control. The quality of zinc spraying directly affects the stability and lifespan of equipment, especially for precision circuit boards, which require uniform zinc layer thickness and must adapt to the complex surface structure of the circuit board.

[0003] However, existing PCB zinc spraying equipment has many technical shortcomings in practical applications, making it difficult to meet the requirements of high-precision processing:

[0004] Traditional devices often lack targeted preheating processes, or suffer from unstable preheating temperatures and poor heat penetration. When the circuit board substrate comes into contact with high-temperature molten zinc (approximately 450°C), the large temperature difference can easily cause the zinc layer to cool rapidly, resulting in pinholes and cracks, which severely affects the adhesion of the zinc layer. Although some devices have preheating structures, they lack insulation design, resulting in significant heat loss. Furthermore, they cannot dynamically adjust preheating parameters according to the thickness and material of the circuit board, leading to inconsistent preheating effects.

[0005] Existing zinc spraying equipment often features fixed nozzle positions, angles, and heights, or requires manual adjustment, making it difficult to adapt to circuit boards of varying widths and wiring configurations. For narrow circuit boards, this can lead to overspraying and wasted material at the edges. For circuit boards with stepped or sloping surfaces, fixed-angle nozzles cannot ensure full coverage of complex areas, requiring multiple rework steps and resulting in low efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a high-precision zinc spraying processing device for circuit boards to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-precision circuit board zinc spraying processing device, comprising a processing table and a support box disposed at the bottom of the processing table, and further comprising...

[0008] A preheating box is installed on the top of the processing table, and a vision sensor and a laser displacement sensor are installed on the top outside the feed port of the preheating box through a horizontal plate. An infrared preheating module is installed side by side on the top of the preheating box.

[0009] The spraying box is located on the top of the processing table on one side of the preheating box. The spraying box has a movable support plate inside. An electric telescopic rod is installed on the top of the spraying box. The output end of the electric telescopic rod extends into the interior of the spraying box and connects to the cover on the top of the movable support plate. Mini electric telescopic rods are evenly installed on the top of the movable support plate inside the cover. The output end of each mini electric telescopic rod extends to the bottom of the movable support plate and is connected to a spray head.

[0010] The cavity inside the support box is equipped with an insulated storage tank and a spraying pump. The input pipe of the spraying pump is connected to the insulated storage tank, and the output end of the spraying pump extends into the interior of the spraying box and is connected to a spring hose. The other end of the spring hose is connected to a distribution pipe set at one end of the movable support plate. Branch pipes are arranged in parallel on the distribution pipe, and each branch pipe is evenly equipped with a diverter pipe. Each diverter pipe is connected to each spray head in a one-to-one correspondence.

[0011] Furthermore, the nozzles in the same column are connected in parallel to each other on one side of the branch pipe through the diversion pipe, and each branch pipe is equipped with a solenoid valve at the end near the distribution pipe. Each solenoid valve is connected to a controller set on one side of the processing table.

[0012] Furthermore, a switch box connected to the controller is provided on one side of the processing table, a servo motor is installed at one end of the processing table, the output end of the servo motor extends to the inside of the processing table and is connected to a lead screw, and a feeding bearing plate is installed on the lead screw, and a sinking groove is provided on the top of the feeding bearing plate.

[0013] Furthermore, electric push rods are installed at both ends of the feeding bearing plates on both sides of the sinking trough. The output ends of the two electric push rods extend to both ends of the inner side of the sinking trough and are equipped with clamping blocks. Each clamping block is equipped with a protective pad on its inner side.

[0014] Furthermore, the inner walls on both sides of the processing table are provided with sliding grooves, and both ends of the feeding bearing plate are provided with sliders extending into the sliding grooves.

[0015] Furthermore, the inner wall of the preheating box is uniformly covered with an insulation layer, and infrared temperature sensor one and infrared temperature sensor two, with their detection ends extending into the preheating box, are respectively installed at both ends of the top of the preheating box.

[0016] Furthermore, a guide ring is provided at one end of the movable support plate, and a stabilizing suspension rod is provided at the top of the spray box corresponding to the position of the guide ring, with the guide ring sleeved on the outside of the stabilizing suspension rod.

[0017] This utility model provides a high-precision zinc spraying processing device for circuit boards, which has significant advantages over the prior art, specifically in the following aspects:

[0018] 1. By installing a vision sensor on the top outside the preheating box inlet, the edge reference of the circuit board to be processed can be accurately identified. Based on feedback from the vision sensor, the controller controls the opening and closing of solenoid valves on the edge support pipes on both sides of the bottom of the movable support plate, thereby achieving automatic adaptation to circuit boards of different widths. This significantly improves the flexibility and applicability of the device, avoiding the errors and time wasted by traditional manual adjustments.

[0019] A laser displacement sensor scans the surface of the circuit board, records its undulation values, and feeds the data back to the controller. Based on this data, the controller precisely controls the miniature electric telescopic rod, adjusting the height of the spray nozzles to ensure that each nozzle is at a consistent distance from the surface of the circuit board to be processed. This effectively solves the problem of uneven coating caused by uneven circuit board surfaces, improving coating quality and precision.

[0020] 2. A preheating chamber is installed at the front of the spraying box. An infrared preheating module preheats the circuit board to a suitable temperature before it is placed into the spraying box. This effectively avoids pinholes or cracks caused by sudden cooling when the molten zinc comes into contact with the cold substrate, significantly improving the quality and adhesion of the sprayed coating. A uniform insulation layer is laid on the inner wall of the preheating chamber to ensure temperature stability during the preheating process, further enhancing the preheating effect and reducing energy loss.

[0021] 3. The process of spraying is automated and refined, improving efficiency and consistency. Spray heads in the same row are connected in parallel on one side of the branch pipe via diverter pipes. Each branch pipe has a solenoid valve installed near the distribution pipe end. The controller adjusts the opening and closing of the solenoid valves as needed, achieving precise adjustment of the spray volume. This not only improves the flexibility of spraying but also reduces material waste. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the feeding support plate structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the nozzle arrangement structure of this utility model;

[0025] Figure 4 This is a bottom view of the movable support plate structure of this utility model;

[0026] In the diagram: 1. Support box; 2. Switch box; 3. Vision sensor; 4. Laser displacement sensor; 5. Preheating box; 6. Infrared temperature sensor one; 7. Infrared preheating module; 8. Insulation layer; 9. Infrared temperature sensor two; 10. Stabilizing suspension rod; 11. Protective cover; 12. Electric telescopic rod; 13. Movable support plate; 14. Spraying box body; 15. Spring hose; 16. Processing table; 17. Servo motor; 18. Chamber; 19. Spraying pump; 20. Insulated storage tank; 21. Controller; 22. Lead screw; 23. Clamping block; 24. Sinking trough; 25. Feeding bearing plate; 26. Slider; 27. Electric push rod; 28. Slide groove; 29. ​​Guide ring; 30. Miniature electric telescopic rod; 31. Diverter pipe; 32. Spray nozzle; 33. Solenoid valve; 34. Distribution pipe; 35. Branch pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figure 1-4 An embodiment of this utility model provides a high-precision circuit board zinc spraying processing device, including a processing table 16 and a support box 1 disposed at the bottom of the processing table 16. A switch box 2 connected to a controller 21 is disposed on one side of the processing table 16. A servo motor 17 is installed at one end of the processing table 16. The output end of the servo motor 17 extends to the inside of the processing table 16 and is connected to a lead screw 22. A feeding bearing plate 25 is installed on the lead screw 22. A sinking groove 24 is disposed on the top of the feeding bearing plate 25.

[0029] Electric push rods 27 are installed at both ends of the feeding bearing plates 25 on both sides of the sinking trough 24. The output ends of the two electric push rods 27 extend to both ends of the inner side of the sinking trough 24 and are equipped with clamping blocks 23. Each clamping block 23 is equipped with a protective pad on its inner side.

[0030] The inner walls on both sides of the processing table 16 are provided with slide grooves 28, and both ends of the feeding bearing plate 25 are provided with sliders 26 extending into the slide grooves 28.

[0031] A switch box 2 connected to the controller 21 is provided on one side of the processing table 16. The switch box 2 is used to receive and transmit control signals to ensure the coordinated operation of various components of the device. The controller 21 can be a PLC (Programmable Logic Controller) or other type of control system, used to precisely control the movement of components such as the servo motor 17 and the electric actuator 27.

[0032] A servo motor 17 is mounted on one end of the processing table 16. The output end of the servo motor 17 extends to the inside of the processing table 16 and is connected to a lead screw 22. The lead screw 22 converts rotary motion into linear motion, driving the feeding support plate 25 to move on the processing table 16. A recessed groove 24 is provided on the top of the feeding support plate 25 for placing the circuit board to be zinc sprayed.

[0033] Electric push rods 27 are installed at both ends of the feeding bearing plates 25 on both sides of the sink trough 24. The output ends of the two electric push rods 27 extend to both ends of the inner side of the sink trough 24 and are equipped with clamping blocks 23. Each clamping block 23 has a protective pad on its inner side to protect the circuit board from damage during clamping. The electric push rods 27 clamp or release the circuit board by pushing or pulling, ensuring that the circuit board remains fixed during the zinc spraying process.

[0034] The inner walls on both sides of the processing table 16 are provided with slide grooves 28, and both ends of the feeding support plate 25 are provided with sliders 26 extending into the slide grooves 28. The sliders 26 slide within the slide grooves 28 to ensure that the feeding support plate 25 moves smoothly under the drive of the servo motor 17.

[0035] The preheating box 5 is installed on the top of the processing table 16. A vision sensor 3 and a laser displacement sensor 4 are installed on the top outside the feed port of the preheating box 5 through a horizontal plate. An infrared preheating module 7 is installed in parallel on the top of the preheating box 5.

[0036] The inner wall of the preheating box 5 is evenly covered with an insulation layer 8, and infrared temperature sensor 6 and infrared temperature sensor 9 with detection ends extending into the preheating box 5 are respectively installed at both ends of the top of the preheating box 5.

[0037] The preheating box 5 is installed on top of the processing table 16, specifically by bolt fixing to ensure its secure fixation. The feed inlet of the preheating box 5 is located on its front side, and a vision sensor 3 and a laser displacement sensor 4 are mounted on the top outer side of the feed inlet via a horizontal plate. The horizontal plate is made of high-strength material to ensure the stability and durability of the sensor installation.

[0038] The vision sensor 3 is used to visually inspect the materials entering the preheating chamber 5, identify information such as the shape and size of the materials, and transmit the detection data to the control system. The laser displacement sensor 4 is used to scan the surface of the circuit board, record its fluctuation values, and feed the data back to the controller.

[0039] An infrared preheating module 7 is installed side-by-side on the top of the preheating chamber 5. This module consists of multiple infrared heating elements, evenly distributed across the entire top to ensure uniform heating of the material. The infrared preheating module 7 is regulated by a control system, which can adjust the heating power according to the material characteristics and preheating requirements.

[0040] The inner wall of the preheating chamber 5 is uniformly covered with an insulation layer 8, which is made of high-efficiency insulation materials such as silicate fiber and polyurethane foam, effectively reducing heat loss and improving preheating efficiency. Infrared temperature sensor 6 and infrared temperature sensor 9, with their detection ends extending into the interior of the preheating chamber 5, are respectively installed at both ends of the top of the preheating chamber 5. Infrared temperature sensor 6 and infrared temperature sensor 9 are located at the left and right ends of the preheating chamber 5, respectively, and are used to monitor the temperature distribution inside the preheating chamber in real time.

[0041] The spraying box 14 is located on the top of the processing table 16 on one side of the preheating box 5. The spraying box 14 has a movable support plate 13 inside. One end of the movable support plate 13 is provided with a guide ring 29. A stabilizing suspension rod 10 is provided at the top of the spraying box 14 corresponding to the position of the guide ring 29. The guide ring 29 is sleeved on the outside of the stabilizing suspension rod 10.

[0042] The interior of the spraying box 14 is equipped with a movable support plate 13. One end of the movable support plate 13 is provided with a guide ring 29, which guides and stabilizes the movement of the movable support plate.

[0043] At the top of the spray booth 14, a stabilizing suspension rod 10 is provided at the position corresponding to the guide ring 29. The stabilizing suspension rod 10 is vertically fixed to the top of the spray booth 14, and the guide ring 29 is sleeved on its outer side. With this structural design, the movable support plate 13 can slide up and down along the stabilizing suspension rod 10 during movement.

[0044] An electric telescopic rod 12 is installed on the top of the spray box 14. The output end of the electric telescopic rod 12 extends into the interior of the spray box 14 and is connected to the cover 11 on the top of the movable support plate 13. Mini electric telescopic rods 30 are evenly installed on the top of the movable support plate 13 inside the cover 11. The output end of each mini electric telescopic rod 30 extends to the bottom of the movable support plate 13 and is connected to a spray nozzle 32.

[0045] The electric telescopic rod 12 is installed at the top center of the spray booth 14. The outer casing of the electric telescopic rod 12 is fixed to the top plate of the spray booth 14, and its output end extends into the interior of the spray booth 14 via a sliding connector. The electric telescopic rod 12 is driven by a DC motor and has an adjustable telescopic length to be adjusted according to the height of the object being sprayed.

[0046] The output end of the electric telescopic rod 12 is connected to the protective cover 11 on the top of the movable support plate 13. The protective cover 11 is made of high-temperature resistant plastic, and its main function is to protect the miniature electric telescopic rod 30 on the movable support plate 13 from contamination by the spraying material.

[0047] The movable support plate 13 is a rectangular metal plate, on which multiple miniature electric telescopic rods 30 are evenly mounted. The output end of each miniature electric telescopic rod 30 extends to the bottom of the movable support plate 13. The miniature electric telescopic rods 30 are also driven by DC motors and have independent telescopic control functions.

[0048] Each miniature electric telescopic rod 30 has a nozzle 32 connected to its output end. The nozzle 32 has a conical structure, is made of stainless steel, and has multiple tiny spray holes inside, which can evenly spray the coating material.

[0049] The cavity 18 inside the support box 1 is equipped with an insulated storage tank 20 and a spray pump 19. The input pipe of the spray pump 19 is connected to the insulated storage tank 20, and the output end of the spray pump 19 extends into the interior of the spray box 14 and is connected to a spring hose 15. The other end of the spring hose 15 is connected to a distribution pipe 34 provided at one end of the movable support plate 13. Branch pipes 35 are arranged in parallel on the distribution pipe 34, and each branch pipe 35 is evenly provided with a diversion pipe 31. Each diversion pipe 31 is connected to each spray head 32 in a one-to-one correspondence.

[0050] The nozzles 32 in the same row are connected in parallel to each other on one side of the branch pipe 35 through the diversion pipe 31, and each branch pipe 35 is equipped with a solenoid valve 33 at the end near the distribution pipe 34. Each solenoid valve 33 is connected to the controller 21 set on one side of the processing table 16.

[0051] The support box 1 is the main structure of the equipment, and its interior contains a chamber 18. The chamber 18 has a reasonable spatial design and can accommodate the insulated storage tank 20 and the spray pump 19. The insulated storage tank 20 is located on the left side of the chamber 18, and the spray pump 19 is located on the right side, and the two are connected by pipes.

[0052] The insulated storage tank 20 is used to store the material to be sprayed. It has an internal insulation layer to ensure the material's temperature remains stable during storage. The inlet pipe of the spray pump 19 is directly connected to the outlet of the insulated storage tank 20, ensuring smooth flow of material into the spray pump 19. The outlet of the spray pump 19 extends into the interior of the spray box 14 and is connected via a spring hose 15.

[0053] One end of the spring hose 15 is connected to the output end of the spray pump 19, and the other end is connected to the distribution pipe 34 provided at one end of the movable support plate 13. The spring hose 15 has good flexibility and can maintain the stability of the connection when the movable support plate 13 moves.

[0054] The distribution pipe 34 is fixed to one end of the movable support plate 13, and several branch pipes 35 are arranged side by side on it. The length and spacing of each branch pipe 35 are precisely designed to ensure uniform spraying. A solenoid valve 33 is installed at the end of the branch pipe 35 near the distribution pipe 34 to control the flow of material.

[0055] Each branch pipe 35 is evenly provided with several diversion pipes 31. One end of each diversion pipe 31 is connected to the branch pipe 35, and the other end is connected to a nozzle 32. The nozzles 32 in the same row are connected in parallel to each other on one side of the branch pipe 35 through the diversion pipes 31, ensuring that each nozzle 32 can receive material independently.

[0056] Each solenoid valve 33 is connected to a controller 21 located on one side of the processing table 16. The controller 21 controls the opening and closing of the solenoid valve 33 through a preset program, thereby achieving precise control of the spraying process.

[0057] In this embodiment of the application, the circuit board to be zinc sprayed is placed in the sink trough 24 of the feeding support plate 25. The controller 21 controls the electric push rods 27 on both sides of the sink trough 24 to extend, driving the clamping block 23 to move closer to the circuit board until the protective pad on the inner side of the clamping block 23 is tightly attached to the edge of the circuit board, thus completing the fixing of the circuit board.

[0058] The controller 21 drives the servo motor 17 at one end of the processing table 16 to operate. The servo motor 17 drives the lead screw 22 to rotate, causing the feeding support plate 25 to move along the lead screw 22. At the same time, the sliders 26 at both ends of the feeding support plate 25 slide in the slide grooves 28 on both sides of the processing table 16 to ensure stable feeding. The circuit board moves towards the preheating box 5.

[0059] When the circuit board moves to the outside of the feed inlet of the preheating box 5, the vision sensor 3 on the horizontal plate performs visual recognition of the circuit board, obtains its edge, size and other parameters and transmits them to the controller 21; at the same time, the laser displacement sensor 4 scans the surface of the circuit board, records the surface undulation data and feeds it back to the controller 21, and the controller 21 presets the adjustment parameters of the subsequent nozzle 32 according to the data.

[0060] After the circuit board enters the preheating chamber 5, the controller 21 activates the infrared preheating module 7 on the top to heat the circuit board; the insulation layer 8 on the inner wall of the preheating chamber 5 reduces heat loss, and the infrared temperature sensor 6 and infrared temperature sensor 9 on the top monitor the temperature inside the chamber in real time and feed the data back to the controller 21 to ensure that the preheating temperature is stable within the set range.

[0061] After preheating, the feeding support plate 25 feeds the circuit board into the spraying box 14; the controller 21 drives the electric telescopic rod 12 on the top of the spraying box 14 to extend and retract, adjusting the height of the movable support plate 13. The guide ring 29 at one end of the movable support plate 13 slides along the stabilizing suspension rod 10 to ensure the smooth movement of the movable support plate 13; at the same time, the controller 21 controls the miniature electric telescopic rod 30 on the top of the movable support plate 13 to extend and retract independently according to the detection data of the laser displacement sensor 4, precisely adjusting the distance between each nozzle 32 and the surface of the circuit board; then, the spraying pump 19 starts, drawing out the zinc liquid in the heat-insulated storage tank 20 through the input pipe, and delivering it through the spring hose 15 to the distribution pipe 34 at one end of the movable support plate 13. According to the detection result of the vision sensor 3, the controller 21 controls the opening and closing of the solenoid valve 33 on the corresponding branch pipe 35. The zinc liquid is delivered to the nozzle 32 through the branch pipe 35 and the diversion pipe 31. The nozzle 32 sprays the zinc liquid evenly onto the surface of the circuit board.

[0062] After zinc spraying is completed, the servo motor 17 rotates in reverse, driving the feeding support plate 25 to move out of the spraying box 14; the controller 21 controls the electric push rod 27 to retract, the clamp 23 releases the circuit board, and the operator takes out the processed circuit board.

[0063] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0066] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-precision zinc spraying processing device for circuit boards, comprising a processing table (16) and a support box (1) disposed at the bottom of the processing table (16), characterized in that: Also includes A preheating box (5) is installed on the top of the processing table (16), and a vision sensor (3) and a laser displacement sensor (4) are installed on the top of the outside of the feed port of the preheating box (5) through a horizontal plate. An infrared preheating module (7) is installed side by side on the top of the preheating box (5). A spraying box (14) is set on the top of the processing table (16) on one side of the preheating box (5), and a movable support plate (13) is provided inside the spraying box (14). An electric telescopic rod (12) is installed on the top of the spraying box (14). The output end of the electric telescopic rod (12) extends into the interior of the spraying box (14) and is connected to the cover (11) on the top of the movable support plate (13). Miniature electric telescopic rods (30) are evenly installed on the top of the movable support plate (13) inside the cover (11). The output end of each miniature electric telescopic rod (30) extends to the bottom of the movable support plate (13) and is connected to a spray nozzle (32). The support box (1) is equipped with a heat-insulating storage tank (20) and a spraying pump (19) in the chamber (18). The input pipe of the spraying pump (19) is connected to the heat-insulating storage tank (20), and the output end of the spraying pump (19) extends into the interior of the spraying box (14) and is connected to a spring hose (15). The other end of the spring hose (15) is connected to a distribution pipe (34) provided at one end of the movable support plate (13). Branch pipes (35) are arranged in parallel on the distribution pipe (34), and each branch pipe (35) is evenly provided with a diversion pipe (31). Each diversion pipe (31) is connected to each nozzle (32) in a one-to-one correspondence.

2. The high-precision circuit board zinc spraying processing device according to claim 1, characterized in that: The nozzles (32) in the same column are connected in parallel to each other on one side of the branch pipe (35) through the diversion pipe (31), and each branch pipe (35) is equipped with a solenoid valve (33) at one end near the distribution pipe (34). Each solenoid valve (33) is connected to a controller (21) set on one side of the processing table (16).

3. The high-precision circuit board zinc spraying processing device according to claim 1, characterized in that: A switch box (2) connected to the controller (21) is provided on one side of the processing table (16). A servo motor (17) is installed at one end of the processing table (16). The output end of the servo motor (17) extends to the inside of the processing table (16) and is connected to a lead screw (22). A feeding bearing plate (25) is installed on the lead screw (22). A sinking groove (24) is provided on the top of the feeding bearing plate (25).

4. The high-precision circuit board zinc spraying processing device according to claim 3, characterized in that: Electric push rods (27) are installed at both ends of the feeding bearing plates (25) on both sides of the sinking trough (24). The output ends of the two electric push rods (27) extend to both ends of the inner side of the sinking trough (24) and are provided with clamping blocks (23). Each clamping block (23) is provided with a protective pad on its inner side.

5. The high-precision circuit board zinc spraying processing device according to claim 3, characterized in that: The inner walls on both sides of the processing table (16) are provided with sliding grooves (28), and both ends of the feeding bearing plate (25) are provided with sliders (26) extending into the sliding grooves (28).

6. The high-precision circuit board zinc spraying processing device according to claim 1, characterized in that: The inner wall of the preheating box (5) is uniformly covered with a heat insulation layer (8), and infrared temperature sensor 1 (6) and infrared temperature sensor 2 (9) with detection ends extending into the preheating box (5) are respectively installed at both ends of the top of the preheating box (5).

7. The high-precision circuit board zinc spraying processing device according to claim 1, characterized in that: One end of the movable support plate (13) is provided with a guide ring (29), and a stabilizing rod (10) is provided at the top of the spray box (14) corresponding to the position of the guide ring (29), and the guide ring (29) is sleeved on the outside of the stabilizing rod (10).

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