Etching device of printed circuit board

Abstract

The utility model discloses an etching device of a printed circuit board, comprising a fixed base plate and an etching cylinder, the top surface of the fixed base plate is fixedly welded with a fixed frame, the center of the top surface of the fixed frame is provided with a rotating motor, the output end of the rotating motor is connected and provided with a rotating shaft, and the bottom end of the rotating shaft is fixedly provided with an upper mounting plate; a connecting rod is installed in the center of the bottom face of the upper installing plate, a lower installing plate is fixedly installed at the bottom end of the connecting rod, installing frames are symmetrically welded to the top face of the fixed bottom plate, installing sliding grooves are formed in the side walls of the installing frames, a driving lead screw is installed in the installing sliding groove in one side, and the top end of the driving lead screw is connected with the output end of a servo motor. The beneficial effects of the utility model are that the device is provided with the etching cylinder, the rotating shaft and the hot-air blower, can automatically and rapidly complete the etching, spin-drying and drying of the printed circuit board, does not need manual transfer and installation operation of workers, is simpler and more convenient to use, improves the working efficiency, and is higher in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board processing, in particular to an etching device for a printed circuit board. Background Art

[0002] Etching printed circuit boards is a technology that manufactures circuit lines by chemical etching. Its working principle is based on the interaction between chemicals and metal surfaces, thereby etching away part of the metal material that needs to be removed to form the required circuit pattern. Etching printed circuit boards is widely used in the manufacture of communication equipment. It can realize complex circuit design, provide stable signal transmission and efficient communication functions. Etching equipment is required in the process of etching printed circuit boards.

[0003] The prior art discloses a printed circuit board etching device with a drying mechanism, which belongs to the technical field of printed circuit boards and includes a driving motor, wherein the output shaft of the driving motor is fixed with a connecting rod. The utility model provides a protective cover on the outer sides of the upper turntable and the lower turntable to block the etching liquid that splashes outward from the centrifuge, and prevent the etching liquid from being exported and splashed. At the same time, the etching liquid flows downward along the inner cavity of the protective cover and converges at the bottom of the inner cavity of the protective cover, which is convenient for unified recycling. At the same time, the air introduced into the heating box through the ventilation pipe is heated by the heating wire to quickly increase the air temperature, and the hot air is used to bake the circuit board body to quickly evaporate the residual liquid on the surface of the circuit board body, so that the circuit board body is kept dry. At the same time, the etching liquid gathered in the second fixed frame can be guided by the guide groove, and the etching liquid is thrown out of the second fixed frame by the rotation of the driving motor to accelerate the drying rate of the circuit board body.

[0004] When the above utility model is in use, although the upper turntable and the lower turntable can be used to centrifugally spin and dry the etching liquid remaining on the printed circuit board, it is relatively cumbersome to use. When in use, the etched printed circuit board must first be transferred out of the etching liquid tank, and then the heating box and the protective cover must be manually installed, and finally the etching must be spin-dried and dried. This operation process is time-consuming and labor-intensive, which not only increases the labor intensity of the workers, but also reduces the processing efficiency of the printed circuit board, and its practicality is average. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the utility model provides an etching device for a printed circuit board, which can automatically and quickly complete the etching, spinning and drying of the printed circuit board without the need for workers to perform manual transfer and installation operations. It is simpler and more convenient to use, and has the advantages of improved work efficiency and greater practicality, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to realize the above-mentioned automatic and rapid completion of etching, drying and drying of printed circuit boards, there is no need for workers to perform manual transfer and installation operations, which is simpler and more convenient to use, improves work efficiency, and has the advantages of greater practicality. The specific technical scheme adopted by the utility model is as follows: a printed circuit board etching device, comprising a fixed base plate and an etching cylinder, a fixed frame is fixedly welded on the top surface of the fixed base plate, and a rotating motor is installed in the center of the top surface of the fixed frame, and a rotating shaft is connected to the output end of the rotating motor, an upper mounting plate is fixedly installed on the bottom end of the rotating shaft, and a connecting rod is installed in the center of the bottom surface of the upper mounting plate, and a lower mounting plate is fixedly installed on the bottom end of the connecting rod, a mounting frame is symmetrically welded on the top surface of the fixed base plate, and a mounting slide groove is opened on the side wall of the mounting frame, a A driving screw is installed in the mounting groove on one side, and the top of the driving screw is connected to the output end of the servo motor, a first guide slide rod is fixedly installed in the mounting groove on the other side, mounting slide blocks are symmetrically fixedly installed on the side walls of both sides of the etching cylinder, a first screw sleeve is fixedly installed in the mounting slide block on one side, and the driving screw is sleeved in the first screw sleeve, a first guide sleeve is fixedly installed in the mounting slide block on the other side, and the first guide slide rod is sleeved in the first guide sleeve, a fixing plate is fixedly installed on the side wall of one side of the etching cylinder, and a hot air blower is installed on the fixing plate, an air uniforming arc box is fixedly installed on the side wall of one side of the etching cylinder, and the inner cavity of the air uniforming arc box is connected to the output end of the hot air blower, and a number of air outlet nozzles are evenly fixedly installed on the inner wall of the air uniforming arc box.

[0009] Furthermore, a plurality of lower mounting frames are evenly fixedly installed on the top surface of the lower mounting plate, a second screw sleeve is fixedly installed on one side of the upper mounting plate, and an adjusting screw is threadedly sleeved on the inner thread of the second screw sleeve, and an adjusting plate is connected and installed on the bottom end of the adjusting screw, a second guide slide rod is fixedly installed on one side of the top surface of the adjusting plate, a second guide sleeve is fixedly installed on one side of the upper mounting plate, and a second guide slide rod is sleeved in the second guide sleeve, and a plurality of upper mounting frames are evenly fixedly installed on the bottom surface of the adjusting plate.

[0010] Furthermore, a through hole is provided in the center of the adjustment plate.

[0011] Furthermore, a purification box is fixedly installed on the outer wall of one side of the etching cylinder, and an activated carbon adsorption layer is installed in the purification box, and an exhaust pipe is installed on one side of the purification box. An air collecting hood is fixedly installed on the side wall of the other side of the etching cylinder, and an air duct is installed on one end of the air collecting hood, and the air duct is connected to the inner cavity of the purification box.

[0012] Furthermore, one side of the inner cavity of the etching tube is connected to a liquid inlet pipe, the center of the bottom surface of the etching tube is connected to a liquid discharge pipe, and a liquid discharge valve is installed on the liquid discharge pipe.

[0013] Furthermore, a control panel is fixedly mounted on the side wall of the mounting frame, and the control panel rotating motor, servo motor, hot air blower and drain valve are electrically connected.

[0014] Furthermore, the central axes of the upper mounting plate, the lower mounting plate and the etching cylinder are on the same straight line, and the diameters of the upper mounting plate and the lower mounting plate are smaller than the inner diameter of the etching cylinder.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides an etching device for a printed circuit board, which has the following beneficial effects:

[0017] (1) The utility model is provided with an upper mounting plate, a lower mounting plate and an adjustment plate. A fixing frame is fixedly welded on the top surface of the fixed bottom plate, and a rotating motor is installed in the center of the top surface of the fixing frame, and a rotating shaft is connected and installed at the output end of the rotating motor. The upper mounting plate is fixedly installed on the bottom end of the rotating shaft, and a connecting rod is installed in the center of the bottom surface of the upper mounting plate, and the lower mounting plate is fixedly installed on the bottom end of the connecting rod. A plurality of lower mounting frames are evenly fixedly installed on the top surface of the lower mounting plate. Before use, a worker can insert the bottom end of the printed circuit board to be etched into the lower mounting frame, and then adjust and rotate the adjusting screw to set the adjustment screw. The lead screw is threadedly sleeved in a second lead screw sleeve fixedly installed on the upper mounting plate, and the bottom end of the adjusting lead screw is connected and installed with an adjusting plate, and the second guide slide rod fixedly installed on the top surface of the adjusting plate is sleeved in the second guide slide sleeve. In addition, a through hole is opened in the center of the adjusting plate so that the connecting rod can pass through the through hole, and a plurality of upper mounting frames are evenly fixedly installed on the bottom surface of the adjusting plate. When the upper mounting frame descends with the adjusting plate, the top end of the printed circuit board can be correspondingly embedded in the upper mounting frame, so that the printed circuit board to be etched can be limited and fixed, thereby ensuring its stability during processing. The operation is simple and convenient, and it is more practical.

[0018] (2) The utility model is provided with an etching cylinder, a rotating shaft and a hot air blower. When in use, a proper amount of etching liquid is first added to the bottom of the inner cavity of the etching cylinder through the liquid inlet pipe. A mounting frame is symmetrically welded on the top surface of the fixed bottom plate, and a mounting slide groove is opened on the side wall of the mounting frame. A driving screw is installed in one mounting slide groove, and the top end of the driving screw is connected to the output end of the servo motor, and a first guide slide rod is fixedly installed in the other mounting slide groove. The side walls of the etching cylinder are symmetrically fixed with mounting slide blocks on both sides. A first screw sleeve is fixedly installed in one mounting slide block, and the driving screw is sleeved in the first screw sleeve. A first guide sleeve is fixedly installed in the other mounting slide block, and the first guide slide rod is sleeved in the first guide sleeve. A worker can start the servo motor through the control panel to drive the driving screw to rotate, which can drive the etching cylinder to move upward along the mounting slide groove until the printed circuit board installed between the upper mounting frame and the lower mounting frame is immersed in the etching liquid. After the etching process is completed, the control panel opens the drain valve installed on the drain pipe to discharge the used etching liquid, and then the etching liquid is discharged through The control panel starts the rotating motor to drive the rotating shaft together with the upper mounting plate, the connecting rod and the lower mounting plate to rotate, and the etching liquid remaining on the printed circuit board can be dried by centrifugal force. Finally, the servo motor drives the driving screw to rotate in the opposite direction until the dried printed circuit board is above the inner cavity of the etching cylinder, and then the control panel starts the hot air blower installed on the fixed plate. The drying hot air generated by the hot air blower enters the uniform air arc box cavity and is finally sprayed out through the air outlet nozzle. The drying hot air can be used to dry several dried printed circuit boards. The exhaust gas generated during the drying process enters the air duct through the air collecting hood and enters the inner cavity of the purification box through the air duct. The inner cavity of the purification box is provided with an activated carbon adsorption layer, which can absorb toxic and harmful substances in the drying exhaust gas, and the purified air is discharged through the exhaust pipe. As described above, a printed circuit board etching device can automatically and quickly complete the etching, drying and drying of the printed circuit board without the need for workers to perform manual transfer and installation operations. It is simpler and more convenient to use, and improves work efficiency and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a printed circuit board etching device according to an embodiment of the utility model;

[0021] Figure 2It is a side cross-sectional view of an etching cylinder of an etching device for a printed circuit board according to an embodiment of the utility model;

[0022] Figure 3 According to the embodiment of the utility model Figure 1 A magnified image of point A;

[0023] Figure 4 According to the embodiment of the utility model Figure 1 A magnified view of point B;

[0024] Figure 5 It is a three-dimensional diagram of the etching cylinder part of an etching device for a printed circuit board according to an embodiment of the utility model;

[0025] Figure 6 It is a three-dimensional diagram of a limiting cover of an etching device for a printed circuit board according to an embodiment of the utility model.

[0026] In the figure:

[0027] 1. Fixed base plate; 2. Mounting frame; 3. Etching cylinder; 4. Driving screw; 5. Servo motor; 6. Lower mounting plate; 7. Fixed frame; 8. Rotating motor; 9. Rotating shaft; 10. Connecting rod; 11. Lower mounting frame; 12. First guide slide bar; 13. Liquid inlet pipe; 14. Mounting slide groove; 15. Mounting slide block; 16. Drain valve; 17. Drain pipe; 18. Fixed plate; 19. Hot air blower; 20. Air uniform arc box; 21. Air outlet nozzle; 22. Air collecting hood; 23. Air guide duct; 24. Purification box; 25. Exhaust pipe; 26. Activated carbon adsorption layer; 27. First screw sleeve; 28. Upper mounting plate; 29. ​​Second screw sleeve; 30. Adjusting screw; 31. Adjusting plate; 32. Upper mounting frame; 33. Through hole; 34. First guide sleeve; 35. Second guide slide bar; 36. Second guide sleeve. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the utility model, a printed circuit board etching device is provided.

[0030] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-6As shown, according to an embodiment of the utility model, an etching device for a printed circuit board includes a fixed base plate 1 and an etching cylinder 3, a fixed frame 7 is fixedly welded on the top surface of the fixed base plate 1, and a rotating motor 8 is installed in the center of the top surface of the fixed frame 7, and a rotating shaft 9 is connected and installed at the output end of the rotating motor 8, an upper mounting plate 28 is fixedly installed at the bottom end of the rotating shaft 9, and a connecting rod 10 is installed in the center of the bottom surface of the upper mounting plate 28, and a lower mounting plate 6 is fixedly installed at the bottom end of the connecting rod 10, a mounting frame 2 is symmetrically welded on the top surface of the fixed base plate 1, and a mounting slot 14 is opened on the side wall of the mounting frame 2, a driving screw 4 is installed in the mounting slot 14 on one side, and the top of the driving screw 4 is connected and installed with the output end of the servo motor 5, and a first guide slide bar 12 is fixedly installed in the mounting slot 14 on the other side, and mounting slots symmetrically fixedly installed on both side walls of the etching cylinder 3. A slider 15 is installed, and a first screw sleeve 27 is fixedly installed in the slider 15 on one side, and a driving screw 4 is sleeved in the first screw sleeve 27, and a first guide sleeve 34 is fixedly installed in the slider 15 on the other side, and a first guide slide sleeve 34 is sleeved in the first guide slide rod 12, a fixing plate 18 is fixedly installed on the side wall of one side of the etching cylinder 3, and a hot air blower 19 is installed on the fixing plate 18, an air uniforming arc box 20 is fixedly installed on the side wall of one side of the etching cylinder 3, and the inner cavity of the air uniforming arc box 20 is connected to the output end of the hot air blower 19, and a plurality of air outlet nozzles 21 are evenly fixedly installed on the inner wall of the air uniforming arc box 20, which can automatically and quickly complete the etching, drying and drying of the printed circuit board, without the need for workers to perform manual transfer and installation operations, so it is simpler and more convenient to use, and improves work efficiency and is more practical.

[0031] In one embodiment, a plurality of lower mounting frames 11 are evenly fixedly installed on the top surface of the lower mounting plate 6, a second screw sleeve 29 is fixedly installed on one side of the upper mounting plate 28, and an adjusting screw 30 is sleeved on the inner thread of the second screw sleeve 29, and an adjusting plate 31 is connected to the bottom end of the adjusting screw 30, a second guide slide bar 35 is fixedly installed on one side of the top surface of the adjusting plate 31, a second guide sleeve 36 is fixedly installed on one side of the upper mounting plate 28, and a second guide slide bar 35 is sleeved in the second guide sleeve 36, and a plurality of upper mounting frames 32 are evenly fixedly installed on the bottom surface of the adjusting plate 31, which can limit and fix the printed circuit board to be etched, ensure its stability during processing, and is simple and convenient to operate, and more practical.

[0032] In one embodiment, a through hole 33 is defined in the center of the adjustment plate 31 .

[0033] In one embodiment, a purification box 24 is fixedly installed on the outer wall of one side of the etching cylinder 3, and an activated carbon adsorption layer 26 is installed in the purification box 24, and an exhaust pipe 25 is installed on one side of the purification box 24, and an air collecting hood 22 is fixedly installed on the side wall of the other side of the etching cylinder 3, and an air duct 23 is installed on one end of the air collecting hood 22, and the air duct 23 is connected to the inner cavity of the purification box 24, which can absorb toxic and harmful substances in the drying exhaust gas and discharge the purified air through the exhaust pipe 25.

[0034] In one embodiment, a liquid inlet pipe 13 is connected to one side of the inner cavity of the etching cylinder 3, a liquid discharge pipe 17 is installed in the center of the bottom surface of the etching cylinder 3, and a liquid discharge valve 16 is installed on the liquid discharge pipe 17, which plays a role in introducing or exporting etching liquid into the inner cavity of the etching cylinder 3.

[0035] In one embodiment, a control panel is fixedly mounted on the side wall of the mounting frame 2, and the control panel rotating motor 8, the servo motor 5, the hot air blower 19 and the drain valve 16 are electrically connected, which plays a role in controlling the normal operation of the device.

[0036] In one embodiment, the central axes of the upper mounting plate 28 , the lower mounting plate 6 and the etching cylinder 3 are on the same straight line, and the diameters of the upper mounting plate 28 and the lower mounting plate 6 are smaller than the inner diameter of the etching cylinder 3 .

[0037] Working principle: The utility model is provided with an upper mounting plate 28, a lower mounting plate 6 and an adjusting plate 31, a fixed frame 7 is fixedly welded on the top surface of the fixed bottom plate 1, and a rotating motor 8 is installed in the center of the top surface of the fixed frame 7, and a rotating shaft 9 is connected and installed at the output end of the rotating motor 8, an upper mounting plate 28 is fixedly installed on the bottom end of the rotating shaft 9, and a connecting rod 10 is installed in the center of the bottom surface of the upper mounting plate 28, and a lower mounting plate 6 is fixedly installed on the bottom end of the connecting rod 10, and a plurality of lower mounting frames 11 are evenly fixedly installed on the top surface of the lower mounting plate 6. Before use, a worker can insert the bottom end of the printed circuit board to be etched into the lower mounting frame 11, and then adjust and rotate the adjusting screw 30, and the adjusting screw 30 is threadedly sleeved on the upper mounting plate 28 for fixing. The second screw sleeve 29 is installed in the second screw sleeve 29, and the bottom end of the adjusting screw 30 is connected and installed with an adjusting plate 31, and the second guide slide bar 35 fixedly installed on the top surface of the adjusting plate 31 is sleeved in the second guide slide sleeve 36. In addition, a through hole 33 is opened in the center of the adjusting plate 31, so that the connecting rod 10 can pass through the through hole 33, and a plurality of upper mounting frames 32 are evenly fixedly installed on the bottom surface of the adjusting plate 31. When the upper mounting frame 32 descends with the adjusting plate 31, the top end of the printed circuit board can be correspondingly embedded in the upper mounting frame 32, so that the printed circuit board to be etched can be limited and fixed, and its stability during processing is guaranteed. The operation is simple and convenient, and the practicality is stronger. In addition, the utility model is provided with an etching cylinder 3, a rotating shaft 9 and a hot air blower 19. When in use, first pass An appropriate amount of etching liquid is added to the bottom of the inner cavity of the etching cylinder 3 through the liquid inlet pipe 13. The top surface of the fixed bottom plate 1 is symmetrically welded with a mounting frame 2, and the side wall of the mounting frame 2 is provided with a mounting slot 14. A driving screw 4 is installed in the mounting slot 14 on one side, and the top of the driving screw 4 is connected to the output end of the servo motor 5. A first guide slide bar 12 is fixedly installed in the mounting slot 14 on the other side. The side walls of the etching cylinder 3 on both sides are symmetrically fixed with mounting slide blocks 15, a first screw sleeve 27 is fixedly installed in the mounting slide block 15 on one side, and the driving screw 4 is sleeved in the first screw sleeve 27, a first guide sleeve 34 is fixedly installed in the mounting slide block 15 on the other side, and the first guide slide bar 12 is sleeved in the first guide sleeve 34. Workers can start the servo motor through the control panel. The servo motor 5 drives the driving screw 4 to rotate, which can drive the etching cylinder 3 to move upward along the installation slide groove 14 until the printed circuit board installed between the upper installation frame 32 and the lower installation frame 11 is immersed in the etching liquid. After the etching process is completed, the control panel opens the drain valve 16 installed on the drain pipe 17 to discharge the used etching liquid, and then starts the rotating motor 8 through the control panel to drive the rotating shaft 9 together with the upper installation plate 28, the connecting rod 10 and the lower installation plate 6 to rotate, so that the etching liquid remaining on the printed circuit board can be dried by centrifugal force. Finally, the servo motor 5 drives the driving screw 4 to rotate in the opposite direction until the dried printed circuit board is above the inner cavity of the etching cylinder 3, and then the control panel starts the hot air blower 19 installed on the fixed plate 18.The drying hot air generated by the hot air blower 19 enters the cavity of the uniform air arc box 20, and is finally ejected through the air outlet nozzle 21. The drying hot air can be used to dry a number of printed circuit boards after being spun dry. The waste gas generated during the drying process enters the air duct 23 through the air collecting hood 22, and enters the inner cavity of the purification box 24 through the air duct 23. The inner cavity of the purification box 24 is installed with an activated carbon adsorption layer 26, which can absorb toxic and harmful substances in the drying waste gas, and the purified air is then discharged through the exhaust pipe 25. As described above, a printed circuit board etching device can automatically and quickly complete the etching, drying and drying of the printed circuit board, without the need for workers to perform manual transfer and installation operations. It is simpler and more convenient to use, and improves work efficiency and is more practical.

[0038] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A printed circuit board etching device, comprising a fixed base plate (1) and an etching cylinder (3), characterized in that: A fixing frame (7) is fixedly welded on the top surface of the fixed base plate (1), and a rotating motor (8) is installed in the center of the top surface of the fixing frame (7), and a rotating shaft (9) is connected and installed at the output end of the rotating motor (8), an upper mounting plate (28) is fixedly installed on the bottom end of the rotating shaft (9), and a connecting rod (10) is installed in the center of the bottom surface of the upper mounting plate (28), and a lower mounting plate (6) is fixedly installed on the bottom end of the connecting rod (10), a mounting frame (2) is symmetrically welded on the top surface of the fixed base plate (1), and a mounting groove (14) is provided on the side wall of the mounting frame (2), a driving screw (4) is installed in the mounting groove (14) on one side, and the top end of the driving screw (4) is connected and installed with the output end of the servo motor (5), and a first guide slide rod (12) is fixedly installed in the mounting groove (14) on the other side, The side walls of both sides of the etching cylinder (3) are symmetrically fixedly mounted with mounting slide blocks (15); a first screw sleeve (27) is fixedly mounted in the mounting slide block (15) on one side, and a driving screw (4) is sleeved in the first screw sleeve (27); a first guide sleeve (34) is fixedly mounted in the mounting slide block (15) on the other side, and a first guide slide bar (12) is sleeved in the first guide sleeve (34); a fixing plate (18) is fixedly mounted on the side wall of one side of the etching cylinder (3), and a hot air blower (19) is mounted on the fixing plate (18); a uniform air arc box (20) is fixedly mounted on the side wall of one side of the etching cylinder (3), and the inner cavity of the uniform air arc box (20) is connected to the output end of the hot air blower (19), and a plurality of air outlet nozzles (21) are uniformly fixedly mounted on the inner wall of the uniform air arc box (20).

2. A printed circuit board etching device according to claim 1, characterized in that: A plurality of lower mounting frames (11) are evenly fixedly mounted on the top surface of the lower mounting plate (6); a second screw sleeve (29) is fixedly mounted on one side of the upper mounting plate (28); an adjusting screw (30) is sleeved on the inner thread of the second screw sleeve (29); an adjusting plate (31) is connected and mounted on the bottom end of the adjusting screw (30); a second guide slide bar (35) is fixedly mounted on one side of the top surface of the adjusting plate (31); a second guide slide sleeve (36) is fixedly mounted on one side of the upper mounting plate (28); a second guide slide sleeve (36) is sleeved on the inner surface of the second guide slide sleeve (36); and a plurality of upper mounting frames (32) are evenly fixedly mounted on the bottom surface of the adjusting plate (31).

3. A printed circuit board etching device according to claim 2, characterized in that: A through hole (33) is provided in the center of the adjustment plate (31).

4. The etching device for a printed circuit board according to claim 1, characterized in that: A purification box (24) is fixedly mounted on the outer wall of one side of the etching cylinder (3), an activated carbon adsorption layer (26) is mounted in the purification box (24), and an exhaust pipe (25) is connected and mounted on one side of the purification box (24); an air collecting hood (22) is fixedly mounted on the side wall of the other side of the etching cylinder (3), an air guide pipe (23) is connected and mounted on one end of the air collecting hood (22), and the air guide pipe (23) is connected and connected to the inner cavity of the purification box (24).

5. The etching device for a printed circuit board according to claim 1, characterized in that: One side of the inner cavity of the etching cylinder (3) is connected to a liquid inlet pipe (13), the center of the bottom surface of the etching cylinder (3) is connected to a liquid discharge pipe (17), and a liquid discharge valve (16) is installed on the liquid discharge pipe (17).

6. The etching device for a printed circuit board according to claim 1, characterized in that: A control panel is fixedly mounted on the side wall of the mounting frame (2), and the control panel rotating motor (8), the servo motor (5), the hot air blower (19) and the drain valve (16) are electrically connected.

7. The etching device for a printed circuit board according to claim 1, characterized in that: The central axes of the upper mounting plate (28), the lower mounting plate (6) and the etching cylinder (3) are on the same straight line, and the diameters of the upper mounting plate (28) and the lower mounting plate (6) are smaller than the inner diameter of the etching cylinder (3).

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