PCB processing etching spraying device
By using a multi-dimensional shaking and jetting system with shaking components and nozzle design, the problems of etching solution retention and reaction by-product removal are solved, thereby improving the uniformity and efficiency of PCB board etching.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN PROVINCE ZHOUTUO CIRCUIT TECH CO LTD
- Filing Date
- 2026-03-10
- Publication Date
- 2026-06-09
AI Technical Summary
In traditional etching spray equipment, the etching solution on the PCB board remains in a specific area, resulting in uneven etching and low reaction efficiency. Furthermore, the lack of an effective byproduct removal mechanism affects circuit accuracy and production efficiency.
The device employs a shaking assembly and nozzle design, using a motor to drive the PCB board to shake in multiple dimensions and the spray head to move synchronously. Combined with a vibration and air jet system, this promotes uniform contact between the etching solution and the metal and removes reaction byproducts.
It improves etching uniformity and efficiency, ensures full contact between the etching solution and the metal, eliminates dead zones in the reaction, and enhances circuit accuracy and production efficiency.
Smart Images
Figure CN122179986A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of PCB board processing, and more specifically, to an etching spray device for PCB board processing. Background Technology
[0002] Etching is a critical process in the manufacturing of printed circuit boards (PCBs). Its purpose is to precisely remove copper foil from non-circuit areas of the copper-clad substrate through a chemical reaction, thereby forming the desired circuit pattern. Spray etching is a widely used process in the industry, in which etching solution is evenly sprayed onto the PCB surface through a nozzle to carry out the reaction.
[0003] However, traditional etching spraying devices or methods often have significant limitations. On the one hand, in many devices, the PCB board is stationary or can only move in a simple unidirectional direction. This can easily lead to the etching solution stagnating in specific areas of the board surface, resulting in insufficient separation of the reacted "old solution" from the copper surface to be reacted, and untimely and uneven replenishment and coverage of fresh etching solution. The consequence is the potential creation of "etching dead zones," causing over-etching or under-etching of the circuitry, severely affecting the accuracy and uniformity of the circuitry. On the other hand, even if some equipment can move the PCB board, it often lacks an auxiliary mechanism to actively remove reaction byproducts (such as bubbles and residues) and forcibly renew the liquid film on the board surface, making it difficult to further improve the etching reaction efficiency and restricting production accuracy and efficiency.
[0004] To address this, an etching spray device for PCB board processing is proposed. Summary of the Invention
[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a PCB board processing etching spray device that uses methods such as board shaking or spray nozzles to help the etchant detach from the PCB board after the reaction, while improving etching uniformity.
[0006] To solve the above problems, the present invention adopts the following technical solution.
[0007] A PCB board processing etching spray device includes a workbench, a placement platform at the upper end of the workbench, a spray head at the upper end of the workbench, a liquid guide pipe fixedly connected to the upper end of the spray head, and a shaking component inside the workbench for shaking the PCB board. The wobbling assembly includes a motor fixedly connected to the left side of the worktable, a reciprocating lead screw fixedly connected to the output end of the motor, a rectangular rod fixedly connected to the inner wall of the left side of the worktable, a moving rod slidably connected to the inner wall of the rectangular rod, a lead screw nut fixedly connected to the inner wall of the moving rod, the lead screw nut meshing with the reciprocating lead screw, the right side of the moving rod rotatably connected to the left side of the placement platform, a helical rod fixedly connected to the right side of the placement platform, and a fixing block provided on the right side of the worktable, the interior of the fixing block being helically driven with the wall of the helical rod.
[0008] Preferably, a round rod is fixedly connected to the right side of the workbench, and the inside of the round rod is fixedly connected to the outside of the fixing block.
[0009] Preferably, rotating blocks are rotatably connected to both sides of the placement platform, and support blocks are fixedly connected to the lower ends of the two rotating blocks. A housing is rotatably connected inside the support block, and a rotating cylinder is rotatably connected inside the housing. Vibration strips are uniformly slidably connected to the outer side of the rotating cylinder, and a first spring is fixedly connected to one side of the vibration strip. The first spring is fixedly connected to the rotating cylinder. Protruding strips are uniformly fixedly connected inside the housing, and threaded blocks are fixedly connected inside the rotating cylinder. Threaded rods are threadedly connected inside the threaded blocks, and both sides of the threaded rods are fixedly connected to the inner walls of both sides of the worktable. The housing is slidably connected to the rod walls of the threaded rods.
[0010] Preferably, the upper ends of both sides of the placement platform are slidably connected to sliding rods, the rod walls of the sliding rods are fitted with second springs, and clamping blocks are fixedly connected to the opposite sides of the two sliding rods.
[0011] Preferably, the upper end of the clamping block is inclined.
[0012] Preferably, the upper end of the workbench is fixedly connected to slide rails at both the front and rear positions. A slider is slidably connected inside the slide rail. A support frame is fixedly connected to the upper end of the two sliders. The upper end of the support frame is fixedly connected to the upper end of the spray head. A rectangular groove is opened on the opposite side of the two slide rails. A connecting rod is fixedly connected to the opposite side of the two sliders. The left side of the connecting rod is fixedly connected to the outer side of the moving rod.
[0013] Preferably, an air cylinder is fixedly connected inside the connecting rod, and crossbars are fixedly connected to the front and rear positions of the inner walls on both sides of the worktable. The walls of the crossbars are slidably connected to the two sides of the air cylinder. A piston is fixedly connected to the walls of the crossbars, and the outer side of the piston is slidably connected to the inner wall of the air cylinder. A first one-way valve is fixedly connected to both sides of the air cylinder, and a hose is fixedly connected to both sides of the air cylinder. A second one-way valve is fixedly connected to the wall of the hose. An air nozzle is fixedly connected to the opposite side of each of the two hoses, and the air nozzle is fixedly connected to the interior of the placement platform.
[0014] Preferably, a drain pipe is fixedly connected to the right side of the workbench.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The oscillating assembly, consisting of a motor, reciprocating lead screw, moving rod, screw rod, and fixed block, drives the placement stage to move the PCB board left and right. At the same time, the screw rod and fixed block cause the placement stage to rotate in both directions. This compound motion enables the PCB board to oscillate in the etching solution in multiple dimensions, effectively promoting the separation of the old etching solution from the board surface after the reaction, allowing the fresh etching solution to better contact the undissolved metal, thereby improving the overall etching effect and uniformity.
[0016] (2) The movement of the placement stage is driven by components such as a rotating block, support block, housing, rotating cylinder, threaded block, and fixed threaded rod, which in turn drive a clever vibration generating mechanism. Specifically, the rotating cylinder rotates under the action of the moving and threaded rod, and the vibrating strip on its outer side periodically hits the protrusion fixed on the inner wall of the housing, generating high-frequency vibration. This vibration is transmitted to the placement stage and the PCB board, which can physically disturb the contact interface between the etching solution and the metal, accelerate the chemical reaction rate between the etching solution and the metal, and thus further improve the etching efficiency.
[0017] (3) The spray head is connected to the moving rod (i.e., the shaking drive source) through the support frame, slider and slide rail. When the moving rod moves the placement platform left and right, it will synchronously drive the spray head to move in the same direction along the slide rail. This design ensures that the etching solution sprayed by the spray head can continuously and evenly cover the entire PCB board surface during the PCB board movement, avoiding spray dead corners caused by relative position changes, and ensuring the stability and effect of the etching process.
[0018] (4) The device integrates an automatic jetting system consisting of an air cylinder, a piston, a one-way valve, and a jet nozzle. When the connecting rod (fixed to the moving rod) moves the air cylinder left and right, the air cylinder moves relative to the fixed piston. Under the control of two sets of one-way valves in opposite directions, it can continuously blow air from the jet nozzle onto the PCB board surface. This airflow helps to blow away the etchant that has reacted on the board surface, promotes the contact between fresh etchant and the board surface, and can help remove reaction byproducts, thereby further improving etching quality and efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a partial structural diagram of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point C; Figure 7 This is a schematic diagram of the convex strip structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point D.
[0020] Explanation of the labels in the diagram: 1. Workbench; 2. Liquid guide pipe; 3. Support frame; 4. Spray head; 5. Slide rail; 6. Crossbar; 7. Helical rod; 8. Drain pipe; 9. Air cylinder; 10. Rectangular trough; 11. Placement platform; 12. Motor; 13. Rectangular rod; 14. Threaded rod; 15. Lead screw nut; 16. Round rod; 17. Reciprocating lead screw; 18. Moving rod; 19. Rotary drum; 20. Fixed block; 21. Threaded block; 22. Vibrating strip; 23. First spring; 24. Housing; 25. Slider; 26. Hose; 27. Second one-way valve; 28. Raised bar; 29. Jet head; 30. Clamping block; 31. Connecting rod; 32. Slide rod; 33. Rotating block; 34. Support block; 35. Piston; 36. First one-way valve; 37. Second spring. Detailed Implementation
[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0022] Please see Figures 1 to 9A PCB board etching spraying device includes a workbench 1, which serves as the basic support and liquid collection structure for the entire device. It is typically a box with an open top, the inner cavity of which can be used to collect waste liquid flowing down during the etching process. The upper end of the workbench 1 is provided with a placement platform 11, which is usually designed as a frame or with multiple supporting ribs to ensure that the PCB board can be stably supported while allowing the etching liquid to pass through smoothly and avoiding liquid accumulation. The PCB board to be etched is placed inside the placement platform 11. The material of the placement platform 11 must have excellent chemical corrosion resistance, such as PP, PVC or special stainless steel. The upper end of the workbench 1 is provided with a spray head 4 for spraying etching liquid. The upper end of the spray head 4 is fixedly connected to a liquid guide pipe 2, which is connected to an external etching liquid circulation supply system to ensure a continuous and stable supply of etching liquid to the spray head 4. The workbench 1 is provided with a shaking component for shaking the PCB board. The wobbling assembly includes a motor 12 fixedly connected to the left side of the worktable 1. The motor 12 is a drive device. In the prior art, a reciprocating lead screw 17 is fixedly connected to the output end of the motor 12, enabling the motor 12 to drive the reciprocating lead screw 17 to rotate. A rectangular rod 13 is fixedly connected to the inner wall of the left side of the worktable 1. The rectangular rod 13 serves as a guide rail, and its cross-section is rectangular to prevent rotation of the mating components. A movable rod 18 is slidably connected to the inner wall of the rectangular rod 13, allowing the movable rod 18 to move left and right within the rectangular rod 13. A lead screw nut 15 is fixedly connected to the inner wall. The lead screw nut 15 is meshed with a reciprocating lead screw 17. The motor 12 drives the reciprocating lead screw 17 to rotate. The reciprocating lead screw 17 causes the lead screw nut 15 to drive the moving rod 18 to move left and right inside the rectangular rod 13. The right side of the moving rod 18 is rotatably connected to the left side of the placement platform 11. The movement of the moving rod 18 drives the placement platform 11 to move. A spiral rod 7 is fixedly connected to the right side of the placement platform 11. A fixing block 20 is provided on the right side of the worktable 1. The interior of the fixing block 20 is screwed to the rod wall of the spiral rod 7. When etching is required, the PCB board to be processed is placed inside the placement table 11, and etching liquid is sprayed through the spray nozzle 4. At this time, the motor 12 is powered on, and the output end of the motor 12 rotates, driving the reciprocating lead screw 17 to rotate. The rotation of the rod wall of the reciprocating lead screw 17 causes the lead screw nut 15 to move left and right. The left and right movement of the lead screw nut 15 causes the moving rod 18 to move left and right. The left and right movement of the moving rod 18 causes the placement table 11 to move left and right, thereby causing the PCB board to move continuously left and right. When the placement table 11 moves, it drives the right-side spiral rod 7 to move left and right. Under the action of the fixing block 20, the spiral rod 7 rotates in both directions. 7. When rotating in both directions, the placement platform 11 is driven to rotate in both directions. The rotation of the placement platform 11 causes the PCB board to sway back and forth. Thus, during operation, the placement platform 11 moves the PCB board left and right through the drive of the motor 12, while the PCB board sways back and forth through the action of the screw rod 7. This compound motion mode, compared with the single linear reciprocating motion, can more effectively agitate the etching solution on the surface of the PCB board, break the boundary layer, promote the contact between the fresh solution and the metal on the board surface, and "shake" the waste liquid and bubbles after the reaction away from the board surface, which greatly improves the uniformity of etching and the reaction rate.
[0023] like Figure 2 As shown, a round rod 16 is fixedly connected to the right side of the workbench 1. The inside of the round rod 16 is fixedly connected to the outside of the fixing block 20. The round rod 16 can wrap around the spiral rod 7 to ensure the spiral connection between the spiral rod 7 and the fixing block 20.
[0024] like Figure 2 and Figure 4 As shown, rotating blocks 33 are rotatably connected to both sides of the placement platform 11. The rotating blocks 33 can rotate relative to the placement platform 11. Support blocks 34 are fixedly connected to the lower ends of the two rotating blocks 33. A housing 24 is rotatably connected inside the support blocks 34. A rotating cylinder 19 is rotatably connected inside the housing 24. The rotating cylinder 19 can rotate relative to the housing 24. Vibration strips 22 are evenly slidably connected to the outer side of the rotating cylinder 19. In a free state, the vibration strips 22 partially extend out of the outer wall of the rotating cylinder 19. A first spring 23 is fixedly connected to one side of the vibration strip 22. Spring 23 provides some support to vibrating strip 22. The first spring 23 is fixedly connected to the rotating drum 19. The inside of the housing 24 is uniformly fixedly connected with protruding strips 28. The inside of the rotating drum 19 is fixedly connected with threaded blocks 21. The movement of the placement platform 11 drives the rotating block 33 to move, which in turn causes the support block 34 to move. The threaded block 21 is threadedly connected with a threaded rod 14. The two sides of the threaded rod 14 are fixedly connected to the inner walls of the two sides of the worktable 1. The position of the threaded rod 14 is kept stable. The housing 24 is slidably connected to the rod wall of the threaded rod 14. When the placement stage 11 moves, it drives the rotating block 33 to move. The movement of the rotating block 33 drives the support block 34 to move. The support block 34 drives the housing 24 to move. The housing 24 drives the rotating cylinder 19 to move. The rotating cylinder 19 drives the threaded block 21 to move. The threaded block 21 rotates under the action of the threaded rod 14. The rotation of the threaded block 21 drives the rotating cylinder 19 to rotate. The rotation of the rotating cylinder 19 drives the vibrating strip 22 to move. When the vibrating strip 22 moves, it will contact the protrusion 28, causing the vibrating strip 22 to move into the rotating cylinder 19. At the same time, it compresses the first spring 23. When the vibrating strip 22 is misaligned with the protrusion 28, the vibrating strip 22 resets under the action of the first spring 23, knocking and vibrating the inner wall of the housing 24, thereby causing the placement stage 11 to vibrate. This high-frequency micro-vibration can effectively destroy the static diffusion layer between the metal and the etching solution on the PCB board surface, greatly accelerate the ion exchange and mass transfer process, and shake off the bubbles and reaction residues attached to the board surface, thereby "further accelerating the reaction speed between the etching solution and the metal, and significantly improving the etching effect and surface quality."
[0025] like Figure 5 and Figure 6 As shown, sliding rods 32 are slidably connected to the upper ends of both sides of the placement platform 11. A second spring 37 is sleeved on the rod wall of each sliding rod 32. Clamping blocks 30 are fixedly connected to opposite sides of the two sliding rods 32. The upper ends of the clamping blocks 30 are inclined, which facilitates the placement of the PCB board into the placement platform 11. The clamping force is provided by the springs, which is gentle and uniform. This prevents the PCB board from shifting or jumping out during violent two-dimensional shaking and high-frequency vibration, and avoids edge damage or stress concentration that may be caused by rigid clamping. This ensures that the PCB board remains in a stable, reliable, and undamaged fixed state during processing.
[0026] like Figure 8 As shown, slide rails 5 are fixedly connected to the front and rear positions of the upper end of the workbench 1. Slider 25 is slidably connected inside the slide rails 5. Slider 25 can move left and right inside the slide rails 5. Support frame 3 is fixedly connected to the upper end of the two sliders 25. The upper end of the support frame 3 is fixedly connected to the upper end of the spray head 4. Rectangular grooves 10 are opened on the opposite side of the two slide rails 5 to allow the connecting rod 31 to move. Connecting rod 31 is fixedly connected to the opposite side of the two sliders 25. The left side of the connecting rod 31 is fixedly connected to the outside of the moving rod 18. When the moving rod 18 moves, it drives the connecting rod 31 to move. The moving connecting rod 31 drives the slider 25 to move inside the slide rail 5. The moving slider 25 drives the support frame 3 to move. The support frame 3 drives the spray head 4 to move. In this way, when the placement platform 11 moves, the spray head 4 can move synchronously, thereby ensuring that the etching solution can cover the upper part of the PCB board and ensure the etching effect.
[0027] like Figure 8 and Figure 9 As shown, an air cylinder 9 is fixedly connected inside the connecting rod 31. When the connecting rod 31 moves, it drives the air cylinder 9 to move. Horizontal rods 6 are fixedly connected to the inner walls of both sides of the worktable 1 at the front and rear positions. The walls of the horizontal rods 6 are slidably connected to the two sides of the air cylinder 9. A piston 35 is fixedly connected to the walls of the horizontal rods 6. The piston 35 is fixedly connected to the horizontal rods 6. A sealing ring is installed on the piston 35, forming a slidable and airtight cavity with the inner wall of the air cylinder 9. The outer side of the piston 35 is slidably connected to the inner wall of the air cylinder 9. The air cylinder 9 moves left and right relative to the piston 35. The outer side of the piston 35 is slidably connected to the inner wall of the air cylinder 9. A first one-way valve 36 is fixedly connected to both sides of the air cylinder 9. A hose 26 is fixedly connected to both sides of the air cylinder 9. A second one-way valve 27 is fixedly connected to the wall of the hose 26. A jet nozzle 29 is fixedly connected to the opposite side of each of the two hoses 26. The jet nozzle 29 blows air and is fixedly connected to the interior of the placement platform 11.
[0028] It should be noted that the first one-way valve 36 and the second one-way valve 27 on one side have opposite one-way control directions. When the piston 35 moves relative to the air cylinder 9, the volume of the left chamber of the air cylinder 9 increases and the air pressure decreases. The first one-way valve 36 on the left side opens to draw in air from the outside. At the same time, the second one-way valve 27 on the left side closes.
[0029] When the volume of the right chamber of the air cylinder 9 decreases, the air pressure increases, the first one-way valve 36 on the right side closes, and the second one-way valve 27 on the right side opens, so that compressed air is ejected from the right jet head 29 through the right hose 26, which can continuously keep the jet head 29 in the jet state. When the air cylinder 9 moves to the left, the process is reversed, with air being drawn in on the right and air being expelled from the left. When the moving rod 18 moves, it drives the connecting rod 31 to move. When the connecting rod 31 moves, it drives the air cylinder 9 to move. The air cylinder 9 moves relative to the piston 35. When the piston 35 moves left and right relative to the air cylinder 9, under the action of the first one-way valve 36 and the second one-way valve 27, the jet head 29 can continuously blow air, so that the upper end of the PCB board is always blown by the gas. This helps the etching solution to detach from the PCB board and ensures that the upper end of the PCB board can contact new etching solution, further improving the etching effect of the PCB board.
[0030] like Figure 2 As shown, a drain pipe 8 is fixedly connected to the right side of the workbench 1. When the work is finished, the waste liquid is discharged through the drain pipe 8, which facilitates the cleaning and maintenance of the equipment and realizes environmentally friendly operation.
[0031] Working principle: When etching is required, the PCB board to be processed is placed inside the placement table 11. Etching liquid is sprayed through the spray nozzle 4. At this time, the motor 12 is powered on, and the output end of the motor 12 rotates, driving the reciprocating lead screw 17 to rotate. The rotation of the rod wall of the reciprocating lead screw 17 causes the lead screw nut 15 to move left and right. The left and right movement of the lead screw nut 15 causes the moving rod 18 to move left and right. The left and right movement of the moving rod 18 causes the placement table 11 to move left and right, thereby causing the PCB board to move continuously left and right. When the placement table 11 moves, it drives the right-side spiral rod 7 to move left and right. The spiral rod 7 is fixed on the block. Under the action of motor 20, the screw rod 7 rotates in both directions, causing the placement platform 11 to rotate in both directions. The rotation of the placement platform 11 causes the PCB board to sway back and forth. Thus, during operation, the placement platform 11 moves the PCB board left and right through the drive of motor 12, while the screw rod 7 causes the PCB board to sway back and forth. This allows the etch liquid to separate from the PCB board after the reaction during etching, so that the subsequent etch liquid can better contact and react with the undissolved metal, thereby improving the etching effect. Furthermore, when the placement stage 11 moves, it drives the rotating block 33 to move. The movement of the rotating block 33 drives the support block 34 to move. The support block 34 drives the housing 24 to move. The housing 24 drives the rotating cylinder 19 to move. The rotating cylinder 19 drives the threaded block 21 to move. The threaded block 21 rotates under the action of the threaded rod 14. The rotation of the threaded block 21 drives the rotating cylinder 19 to rotate. The rotation of the rotating cylinder 19 drives the vibrating strip 22 to move. When the vibrating strip 22 moves, it will contact the protrusion 28, causing the vibrating strip 22 to move into the interior of the rotating cylinder 19. At the same time, it compresses the first spring 23. When the vibrating strip 22 is misaligned with the protrusion 28, the vibrating strip 22 resets under the action of the first spring 23, knocking and vibrating the inner wall of the housing 24, thereby causing the placement stage 11 to vibrate. This can accelerate the reaction speed between the etching solution and the metal, and further improve the etching effect. Furthermore, when the moving rod 18 moves, it drives the connecting rod 31 to move. The moving connecting rod 31 drives the slider 25 to move inside the slide rail 5. The moving slider 25 drives the support frame 3 to move. The support frame 3 drives the spray head 4 to move. In this way, when the placement table 11 moves, the spray head 4 can move synchronously, thereby ensuring that the etching solution can cover the upper end of the PCB board and ensure the etching effect. Furthermore, when the moving rod 18 moves, it drives the connecting rod 31 to move. When the connecting rod 31 moves, it drives the air cylinder 9 to move. The air cylinder 9 moves relative to the piston 35. When the piston 35 moves left and right relative to the air cylinder 9, under the action of the first one-way valve 36 and the second one-way valve 27, the jet head 29 can continuously blow air, so that the upper end of the PCB board is always blown by the gas. This helps the etching solution to detach from the PCB board and ensures that the upper end of the PCB board can contact new etching solution, further improving the etching effect of the PCB board.
[0032] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.
Claims
1. A PCB board etching spraying device, comprising a worktable (1), characterized in that: The upper end of the workbench (1) is provided with a placement platform (11), the upper end of the workbench (1) is provided with a spray head (4), the upper end of the spray head (4) is fixedly connected with a liquid guide pipe (2), and the inside of the workbench (1) is provided with a shaking component, which is used to shake the PCB board. The shaking assembly includes a motor (12) fixedly connected to the left side of the workbench (1). The output end of the motor (12) is fixedly connected to a reciprocating lead screw (17). A rectangular rod (13) is fixedly connected to the inner wall of the left side of the workbench (1). A moving rod (18) is slidably connected to the inner wall of the rectangular rod (13). A lead screw nut (15) is fixedly connected to the inner wall of the moving rod (18). The lead screw nut (15) is meshed with the reciprocating lead screw (17). The right side of the moving rod (18) is rotatably connected to the left side of the placement platform (11). A spiral rod (7) is fixedly connected to the right side of the placement platform (11). A fixing block (20) is provided on the right side of the workbench (1). The interior of the fixing block (20) is helically driven with the rod wall of the spiral rod (7).
2. The PCB board etching spray device according to claim 1, characterized in that: A round rod (16) is fixedly connected to the right side of the workbench (1), and the inside of the round rod (16) is fixedly connected to the outside of the fixing block (20).
3. The PCB board etching spray device according to claim 1, characterized in that: Rotating blocks (33) are rotatably connected to both sides of the placement platform (11). Support blocks (34) are fixedly connected to the lower ends of the two rotating blocks (33). A housing (24) is rotatably connected inside the support block (34). A rotating cylinder (19) is rotatably connected inside the housing (24). A vibrating strip (22) is slidably connected to the outer side of the rotating cylinder (19). A first spring (23) is fixedly connected to one side of the vibrating strip (22). The first spring (23) is fixedly connected to the rotating cylinder (19). A protruding strip (28) is slidably connected inside the housing (24). A threaded block (21) is fixedly connected inside the rotating cylinder (19). A threaded rod (14) is threadedly connected inside the threaded block (21). The two sides of the threaded rod (14) are fixedly connected to the inner walls of both sides of the workbench (1). The housing (24) is slidably connected to the rod wall of the threaded rod (14).
4. The PCB board etching spray device according to claim 1, characterized in that: The upper ends of both sides of the placement platform (11) are slidably connected to slide rods (32), and the rod walls of the slide rods (32) are fitted with second springs (37). Clamping blocks (30) are fixedly connected to the opposite sides of the two slide rods (32).
5. The PCB board etching spray device according to claim 4, characterized in that: The upper end of the clamping block (30) is inclined.
6. The PCB board etching spray device according to claim 1, characterized in that: The workbench (1) is fixedly connected to slide rails (5) at both the front and rear positions of the upper end. Slider (25) is slidably connected inside the slide rail (5). The upper ends of the two sliders (25) are fixedly connected to a support frame (3). The upper end of the support frame (3) is fixedly connected to the upper end of the spray head (4). A rectangular groove (10) is opened on the opposite side of the two slide rails (5). A connecting rod (31) is fixedly connected on the opposite side of the two sliders (25). The left side of the connecting rod (31) is fixedly connected to the outside of the moving rod (18).
7. The PCB board etching spray device according to claim 6, characterized in that: An air cylinder (9) is fixedly connected inside the connecting rod (31). A crossbar (6) is fixedly connected to the front and rear positions of the inner walls on both sides of the workbench (1). The wall of the crossbar (6) is slidably connected to both sides of the air cylinder (9). A piston (35) is fixedly connected to the wall of the crossbar (6). The outer side of the piston (35) is slidably connected to the inner wall of the air cylinder (9). A first one-way valve (36) is fixedly connected to both sides of the air cylinder (9). A hose (26) is fixedly connected to both sides of the air cylinder (9). A second one-way valve (27) is fixedly connected to the wall of the hose (26). A jet nozzle (29) is fixedly connected to the opposite side of the two hoses (26). The jet nozzle (29) is fixedly connected to the inside of the placement table (11).
8. The PCB board etching spray device according to claim 1, characterized in that: A drain pipe (8) is fixedly connected to the right side of the workbench (1).