A kind of etching device for circuit board production

Abstract

The present invention relates to the technical field of circuit board equipment, and specifically to an etching device for circuit board production, comprising a workbench, a circular plate fixedly connected to the middle position of the top end of the workbench, an empty slot arranged inside the circular plate, a transmission shaft rotatably connected to the middle position of the bottom end of the empty slot, the top end of the transmission shaft penetrates the circular plate and extends to the top side of the circular plate and is fixedly connected to an electric cylinder, the bottom end of the electric cylinder rotatably cooperates with the top end of the circular plate, a first gear is sleeved on the outer side of the transmission shaft, the first gear is located inside the empty slot, a first motor is fixedly connected to the right side of the top end of the circular plate, the speed of solution flow on the surface of the circuit board is increased, the etching effect is increased, the working efficiency of the etching is increased, the manual removal of the corroded circuit board for cleaning is avoided, the safety of its use is improved, the loading and unloading, etching, cleaning and drying of the circuit board can be carried out simultaneously, the work efficiency is improved, and the practicality of its use is improved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board equipment, in particular to an etching device used for circuit board manufacturing. Background Art

[0002] As we all know, the existing circuit boards usually need to undergo a corrosion process during board manufacturing. The main steps are: prepare a solution by mixing sulfuric acid and hydrogen peroxide in a ratio of 3:1, and then put the double-sided circuit board containing ink into the solution, wait for about three to four minutes, and after all the places on the copper plate except the ink are corroded, take out the circuit board and wash it with clean water.

[0003] The utility model patent with Chinese patent number CN201720970058.8 discloses a surface etching device for double-sided circuit board production, including a mounting plate, two No. 1 hydraulic cylinders are symmetrically installed at the lower end of the mounting plate, a support plate is installed at the top of the two No. 1 hydraulic cylinders through a flange, and two movable fixing mechanisms are installed at the lower end of the support plate facing each other; when in use, it can realize the lifting, clamping, fixing and high-efficiency etching functions of the double-sided circuit board.

[0004] The above-mentioned prior art solutions still have the following defects: the circuit board is corroded only by stirring the mixed solution of sulfuric acid and hydrogen peroxide through a stirring device, the corrosion effect on the circuit board is poor, the corrosion rate is slow, and the corrosion efficiency is reduced. After the circuit board is corroded, the circuit board needs to be taken out manually. Since sulfuric acid and hydrogen peroxide are highly corrosive, the sulfuric acid and hydrogen peroxide on the circuit board are easily touched by the staff, causing harm to the staff. The corroded circuit board needs to be taken to a cleaning place for cleaning, which reduces the work efficiency and reduces the practicality of its use. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an etching device for circuit board manufacturing.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an etching device for circuit board production, comprising a workbench, a circular plate is fixedly connected to the middle position of the top of the workbench, an empty slot is arranged inside the circular plate, a transmission shaft is rotatably connected to the middle position of the bottom end of the empty slot, the top end of the transmission shaft penetrates the circular plate and extends to the top side of the circular plate and is fixedly connected to an electric cylinder, the bottom end of the electric cylinder is rotatably matched with the top end of the circular plate, a first gear is sleeved on the outer side of the transmission shaft, the first gear is located inside the empty slot, a first motor is fixedly connected to the right side of the top of the circular plate, a first rotating shaft is fixedly connected to the output end of the first motor, the bottom end of the first rotating shaft extends to the inside of the empty slot and is fixedly connected to a second gear, the second gear is meshed with the first gear, a connecting block is fixedly connected to the top end, a connecting plate is fixedly connected to the top end, a connecting plate is fixedly connected to the bottom end of the connecting plate on the side away from the connecting block, a box cover is fixedly connected to the connecting plate and the box cover, a longitudinal through hole is arranged on the connecting plate and the box cover, a sliding rod is slidably arranged inside the through hole, and the bottom end of the sliding rod is fixedly connected There is a mounting plate, and multiple groups of fixing clips are evenly arranged at the bottom end of the mounting plate. The top end of the sliding rod is fixedly connected to the limiting plate, and the outer sleeve of the sliding rod is provided with a compression spring, the bottom end of the compression spring contacts the top end of the connecting plate, and the top end of the compression spring contacts the bottom end of the limiting plate. The connecting plates are fixedly connected with fixing blocks, and the top end of the fixing blocks is fixedly connected to the second motor, and the output end of the second motor is fixedly connected to a cam, and the outer wall of the cam contacts the top end of the limiting plate. The left and rear sides of the top end of the workbench are respectively fixedly connected to the corrosion box and the cleaning box, and the left side of the bottom end of the workbench is fixedly connected to the third motor, and the output end of the third motor is fixedly connected to the second rotating shaft, and the top end of the second rotating shaft passes through the workbench and the corrosion box and extends to the interior of the corrosion box, and the top of the second rotating shaft is fixedly connected to a rotating plate, and the left and right sides of the top end of the rotating plate are fixedly connected to stirring plates, and the bottom ends of the connecting plates are fixedly connected to pressure switches matching the second motor, and the upper side of the right end of the corrosion box and the upper side of the front end of the cleaning box are fixedly connected to a pressing plate, and the top of the pressing plate contacts the bottom end of the pressure switch.

[0009] Preferably, a plurality of water distribution pipes are evenly and fixedly connected to the inner wall of the cleaning box, two adjacent water distribution pipes are connected by a connecting water pipe, a plurality of water nozzles are evenly connected inside the water distribution pipes, a water pump is fixedly connected to the left rear side of the top of the workbench, the input end of the water pump is connected to the bottom side of the inside of the cleaning box through a first water pipe, and the output end of the water pump is connected to the water distribution pipe located in the middle through a second water pipe.

[0010] Furthermore, the specifications and sizes of the cleaning box and the corrosion box are consistent, and the cleaning box and the corrosion box are both compatible with the box cover.

[0011] Furthermore, the bottom side of the left end of the corrosion box is connected to a drain pipe, a first valve is installed on the drain pipe, the upper side of the rear end of the corrosion box is fixedly connected to a first collecting box, and the right end of the first collecting box is fixedly connected to the upper side of the left end of the cleaning box.

[0012] On the basis of the above-mentioned scheme, the bottom side of the rear end of the cleaning box is connected to a first drain pipe, and a second valve is installed on the first drain pipe.

[0013] Further on the basis of the above solution, the four corners of the bottom end of the workbench are fixedly connected with legs.

[0014] As a further feature of the present invention, a protection box is installed on the top of each box cover, and the protection box is located outside the second motor and the sliding rod.

[0015] As a further solution of the present invention, a blow-drying device is fixedly connected to the right side of the top of the workbench, and the blow-drying device includes a second collecting box and a fan. The bottom end of the second collecting box is fixedly connected to the right side of the top of the workbench, and air distribution pipes are fixedly connected to the left and right sides of the top of the second collecting box. The top of each air distribution pipe is connected to a plurality of air nozzles, and the bottom end of the fan is fixedly connected to the right rear side of the top of the workbench, and the output end of the fan is connected to the two air distribution pipes through a connecting air pipe.

[0016] As a further solution of the present invention, a second drain pipe is connected to the lower left side of the rear end of the second collecting box, and a third valve is installed on the second drain pipe.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides an etching device for circuit board manufacturing, which has the following beneficial effects:

[0019] 1. The etching device for circuit board production clamps the circuit board through multiple sets of fixing clips at the bottom end of the box cover on the front side, drives the second gear to rotate through the first motor, drives the first gear to rotate through the second gear, and drives the electric cylinder to rotate so that the box cover fixed with the circuit board is rotated to the top of the etching box, and the box cover is downwardly moved through the electric cylinder, and the bottom end of the box cover is contacted with the top end of the etching box, and the circuit board is corroded by the mixed solution of sulfuric acid and hydrogen peroxide in the etching box, and the circuit board is moved up and down by the cam driven by the second motor, and the mixed solution of sulfuric acid and hydrogen peroxide is stirred by the rotating plate and the stirring plate driven by the third motor, thereby increasing the flow speed of the solution on the surface of the circuit board, increasing the corrosion effect, and increasing the working efficiency of the corrosion.

[0020] 2. The etching device for circuit board production, through the cooperation of the first motor and the electric cylinder, rotates the corroded circuit board to the inside of the cleaning box, and uses a water pump to pump water through a water nozzle to clean the circuit board, avoiding the need to manually remove the corroded circuit board for cleaning, thereby improving the safety of its use. After the circuit board is cleaned, the fan blows gas onto the circuit board through the air nozzle to dry the water on the circuit board. The loading and unloading, etching, cleaning and drying of the circuit board can be carried out simultaneously, thereby reducing the work drop and improving the practicality of its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a front view structural schematic diagram of a part of the structure of the present invention;

[0023] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention;

[0024] Figure 4 It is a front cross-sectional structural schematic diagram of the cleaning box of the present invention;

[0025] Figure 5 It is a rear structural schematic diagram of the present invention.

[0026] In the figure: 1, workbench; 2, round plate; 3, transmission shaft; 4, electric cylinder; 5, first gear; 6, first motor; 7, first rotating shaft; 8, second gear; 9, connecting block; 10, connecting plate; 11, box cover; 12, slide bar; 13, mounting plate; 14, fixing clamp; 15, limit plate; 16, compression spring; 17, fixing block; 18, second motor; 19, cam; 20, corrosion box; 21, cleaning box; 22, third motor; 23, second rotating shaft; 24, rotating plate; 25, Stirring plate; 26. Pressure switch; 27. Pressing plate; 28. Water distribution pipe; 29. ​​Water nozzle; 30. Water pump; 31. First water pipe; 32. Second water pipe; 33. Connecting water pipe; 34. Drain pipe; 35. First valve; 36. First collecting box; 37. First drain pipe; 38. Second valve; 39. Support leg; 40. Protection box; 41. Second collecting box; 42. Fan; 43. Air distribution pipe; 44. Air nozzle; 45. Connecting air pipe; 46. Second drain pipe; 47. Third valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figure 1-5A corrosion device for circuit board production includes a workbench 1, a circular plate 2 is fixedly connected to the middle position of the top of the workbench 1, an empty slot is arranged inside the circular plate 2, a transmission shaft 3 is rotatably connected to the middle position of the bottom end of the empty slot, the top end of the transmission shaft 3 passes through the circular plate 2 and extends to the top side of the circular plate 2 and is fixedly connected to an electric cylinder 4, the bottom end of the electric cylinder 4 is rotatably matched with the top end of the circular plate 2, a first gear 5 is sleeved on the outer side of the transmission shaft 3, the first gear 5 is located inside the empty slot, a first motor 6 is fixedly connected to the right side of the top end of the circular plate 2, a first rotating shaft 7 is fixedly connected to the output end of the first motor 6, the bottom end of the first rotating shaft 7 extends to the inside of the empty slot and is fixedly connected to a second gear 8, the second gear 8 is meshed with the first gear 5, and the electric The top of the cylinder 4 is fixedly connected with a connecting block 9, and the top front end, rear end, left end and right end of the connecting block 9 are fixedly connected with a connecting plate 10, and the bottom end of the connecting plate 10 away from the connecting block 9 is fixedly connected with a box cover 11, and the connecting plate 10 and the box cover 11 are provided with longitudinally penetrating through holes, and a sliding rod 12 is slidably provided inside the through hole, and the bottom end of the sliding rod 12 is fixedly connected with a mounting plate 13, and the bottom end of the mounting plate 13 is evenly provided with a plurality of groups of fixing clips 14, each group of fixing clips 14 has two, and they are symmetrically arranged with respect to the center plane of the box cover 11, so as to fix the two sides of the top of the circuit board, and the top of the sliding rod 12 is fixedly connected with a limiting plate 15, and the outer side of the sliding rod 12 is provided with a compression spring 16, and the bottom of the compression spring 16 The end contacts with the top end of the connecting plate 10, the top end of the compression spring 16 contacts with the bottom end of the limit plate 15, and the connecting plate 10 is fixedly connected with a fixing block 17, and the top end of the fixing block 17 is fixedly connected with a second motor 18, and the output end of the second motor 18 is fixedly connected with a cam 19, and the outer wall of the cam 19 contacts with the top end of the limit plate 15. The cam 19 is driven to rotate by the second motor 18, and the cam 19 rotates and the slide bar 12 slides up and down through the cooperation of the compression spring 16, so that the circuit board slides up and down, thereby improving the rate and effect of etching and cleaning the circuit board. The left side and the rear side of the top of the workbench 1 are respectively fixedly connected with the corrosion box 20 and the cleaning box 21, and the left side of the bottom end of the workbench 1 is fixedly connected with the third motor 22 The output end of the third motor 22 is fixedly connected to the second rotating shaft 23, the top of the second rotating shaft 23 passes through the workbench 1 and the corrosion box 20 and extends to the interior of the corrosion box 20, the top of the second rotating shaft 23 is fixedly connected to the rotating plate 24, the left and right sides of the top of the rotating plate 24 are fixedly connected to the stirring plate 25, the bottom end of the connecting plate 10 is fixedly connected to the pressure switch 26 matching the second motor 18, the upper side of the right end of the corrosion box 20 and the upper side of the front end of the cleaning box 21 are fixedly connected to the pressing plate 27, the top of the pressing plate 27 is in contact with the bottom end of the pressure switch 26, when the pressure switch 26 is in contact with the pressing plate 27, the connection line of the second motor 18 on the corresponding connecting plate 10 is connected, so that the corresponding second motor 18 works.

[0030] It should also be noted that a plurality of water distribution pipes 28 are evenly and fixedly connected to the inner wall of the cleaning box 21, and two adjacent water distribution pipes 28 are connected by a connecting water pipe 33. A plurality of water nozzles 29 are evenly connected to the inside of the water distribution pipe 28. A water pump 30 is fixedly connected to the left rear side of the top of the workbench 1, and the input end of the water pump 30 is connected to the bottom side of the inside of the cleaning box 21 through a first water pipe 31, and the output end of the water pump 30 is connected to the water distribution pipe 28 located in the middle through a second water pipe 32. The water in the cleaning box 21 is sprayed onto the circuit board through the water nozzle 29 by the water pump 30, and the corroded circuit board is cleaned. The specifications and dimensions of the cleaning box 21 and the corrosion box 20 are consistent. The cleaning box 21 and the corrosion box 20 are both adapted to the box cover 11 to ensure the sealing of the connection between the box cover 11 and the cleaning box 21 and the corrosion box 20. The bottom side of the left end of the corrosion box 20 is connected to a drain pipe 34. A first valve 35 is installed to facilitate the discharge and replacement of the solution in the corrosion box 20. A first collecting box 36 is fixedly connected to the upper side of the rear end of the corrosion box 20. The right end of the first collecting box 36 is fixedly connected to the upper side of the left end of the cleaning box 21. The first collecting box 36 collects the mixed solution of sulfuric acid and hydrogen peroxide that drips from the circuit board during the rotation from the corrosion box 20 to the cleaning box 21 to prevent it from dripping onto the workbench 1. A first drain pipe 37 is connected to the bottom side of the rear end of the cleaning box 21. A second valve 38 is installed on the first drain pipe 37 to facilitate the discharge of water in the cleaning box 21. Support legs 39 are fixedly connected to the four corners of the bottom end of the workbench 1 to support the workbench 1 and play a supporting role. A protective box 40 is installed on the top of each box cover 11. The protective box 40 is located on the outside of the second motor 18 and the sliding rod 12 to play a protective role.

[0031] In this embodiment, the models of the first motor 6, the second motor 18 and the third motor 22 are Y80M1-2, YLJ90-3 / 6 and ZWBPD020020-256 respectively. The first motor 6, the second motor 18 and the third motor 22 are all well-known equipment purchased directly on the market by technicians in this field. Here we just use them and do not make any structural and functional improvements to them. We will not go into details here. The first motor 6, the second motor 18 and the third motor 22 are all provided with a control switch matching them. The installation position of the control switch is selected according to actual usage requirements to facilitate the operator to perform operation and control.

[0032] The working principle of this embodiment is as follows: the circuit board is clamped by multiple sets of fixing clips 14 at the bottom end of the box cover 11 located on the front side, the second gear 8 is driven to rotate by the first motor 6, the second gear 8 drives the first gear 5 to rotate, and the first gear 5 drives the electric cylinder 4 to rotate so that the box cover 11 fixed with the circuit board is rotated to the top of the corrosion box 20, the box cover 11 is downwardly moved by the electric cylinder 4, and the bottom end of the box cover 11 is contacted with the top end of the corrosion box 20, and the circuit board is corroded by the mixed solution of sulfuric acid and hydrogen peroxide in the corrosion box 20, the cam 19 is driven to rotate by the second motor 18 to move the circuit board up and down, and the rotating plate 24 and the stirring plate 25 are driven to rotate by the third motor 22 to stir the mixed solution of sulfuric acid and hydrogen peroxide, and the first motor 6 and the electric cylinder 4 cooperate to rotate the corroded circuit board to the inside of the cleaning box 21, and the water pump 30 is used to clean the circuit board through the water nozzle 29, thereby avoiding the need to manually remove the corroded circuit board for cleaning, thereby improving the safety of its use.

[0033] Example 2

[0034] See also Figure 1-5 , a corrosion device for circuit board production, a drying device is fixedly connected to the right side of the top of the workbench 1, the drying device includes a second collecting box 41 and a fan 42, the bottom end of the second collecting box 41 is fixedly connected to the right side of the top of the workbench 1, the left and right sides of the top of the second collecting box 41 are fixedly connected with air distribution pipes 43, the top of each air distribution pipe 43 is connected with a plurality of air nozzles 44, the bottom end of the fan 42 is fixedly connected to the right rear side of the top of the workbench 1, the output end of the fan 42 is connected to the two air distribution pipes 43 through the connecting air pipe 45, the air is blown onto the circuit board through the air nozzle 44 by the fan 42, and the water on the circuit board is dried, the lower left side of the rear end of the second collecting box 41 is connected to the second drain pipe 46, the second drain pipe 46 is installed with a third valve 47, and the water collected in the second collecting box 41 is conveniently discharged through the second drain pipe 46.

[0035] In this embodiment, the model of the fan 42 is PYHL-14A. This fan 42 is a well-known device for technical personnel in this field that is directly purchased on the market. Here we only use it and do not make any structural and functional improvements to it. We will not go into details here. The fan 42 is provided with a control switch that matches it. The installation position of the control switch is selected according to actual use requirements to facilitate the operator to perform operation and control.

[0036] The difference between this embodiment and embodiment 1 is that this embodiment adds a drying device on the basis of embodiment 1.

[0037] The working principle of this embodiment is as follows: the air is blown out from the air nozzle 44 through the connecting air duct and the two branch air ducts by the air fan 42 to dry the water on the cleaned circuit board.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An etching device for circuit board manufacturing, comprising a workbench (1), characterized in that: A circular plate (2) is fixedly connected to the middle position of the top of the workbench (1), an empty slot is provided inside the circular plate (2), a transmission shaft (3) is rotatably connected to the middle position of the bottom end of the empty slot, the top end of the transmission shaft (3) passes through the circular plate (2) and extends to the top side of the circular plate (2) to be fixedly connected to an electric cylinder (4), the bottom end of the electric cylinder (4) is rotatably matched with the top end of the circular plate (2), a first gear (5) is sleeved on the outer side of the transmission shaft (3), the first gear (5) is located inside the empty slot, a first motor (6) is fixedly connected to the right side of the top end of the circular plate (2), the output end of the first motor (6) is fixedly connected to a first rotating shaft (7), the bottom end of the first rotating shaft (7) extends to the inside of the empty slot and is fixedly connected to the top of the circular plate (2). A second gear (8) is connected, and the second gear (8) is meshed with the first gear (5). The top end of the electric cylinder (4) is fixedly connected to a connecting block (9). The front end, rear end, left end and right end of the top end of the connecting block (9) are fixedly connected to a connecting plate (10). The bottom end of the connecting plate (10) away from the connecting block (9) is fixedly connected to a box cover (11). The connecting plate (10) and the box cover (11) are provided with longitudinally penetrating through holes. A sliding rod (12) is slidably provided inside the through hole. The bottom end of the sliding rod (12) is fixedly connected to a mounting plate (13). The bottom end of the mounting plate (13) is evenly provided with a plurality of fixing clips (14). The top end of the sliding rod (12) is fixedly connected to a limiting plate ( 15), a compression spring (16) is sleeved on the outer side of the slide bar (12), the bottom end of the compression spring (16) contacts the top end of the connecting plate (10), the top end of the compression spring (16) contacts the bottom end of the limit plate (15), the connecting plate (10) is fixedly connected with a fixing block (17), the top end of the fixing block (17) is fixedly connected with a second motor (18), the output end of the second motor (18) is fixedly connected with a cam (19), the outer side wall of the cam (19) contacts the top end of the limit plate (15), the left side and the rear side of the top end of the workbench (1) are respectively fixedly connected with a corrosion box (20) and a cleaning box (21), and the left side of the bottom end of the workbench (1) is fixedly connected with a third motor The output end of the third motor (22) is fixedly connected to a second rotating shaft (23), the top end of the second rotating shaft (23) passes through the workbench (1) and the corrosion box (20) and extends to the interior of the corrosion box (20), the top end of the second rotating shaft (23) is fixedly connected to a rotating plate (24), the left and right sides of the top end of the rotating plate (24) are fixedly connected to stirring plates (25), the bottom ends of the connecting plates (10) are fixedly connected to a pressure switch (26) matching the second motor (18), the upper side of the right end of the corrosion box (20) and the upper side of the front end of the cleaning box (21) are fixedly connected to a pressing plate (27), and the top end of the pressing plate (27) contacts the bottom end of the pressure switch (26); A plurality of water distribution pipes (28) are evenly and fixedly connected to the inner wall of the cleaning box (21); two adjacent water distribution pipes (28) are connected via a connecting water pipe (33); a plurality of water nozzles (29) are evenly connected to the inside of the water distribution pipes (28); a water pump (30) is fixedly connected to the left rear side of the top of the workbench (1); an input end of the water pump (30) is connected to the bottom side of the inside of the cleaning box (21) via a first water pipe (31); and an output end of the water pump (30) is connected to the water distribution pipe (28) located in the middle via a second water pipe (32); A drying device is fixedly connected to the right side of the top of the workbench (1), and the drying device comprises a second collection box (41) and a fan (42). The bottom end of the second collection box (41) is fixedly connected to the right side of the top of the workbench (1). Air distribution pipes (43) are fixedly connected to the left and right sides of the top of the second collection box (41). The top of each air distribution pipe (43) is connected to a plurality of air nozzles (44). The bottom end of the fan (42) is fixedly connected to the right rear side of the top of the workbench (1). The output end of the fan (42) is connected to the two air distribution pipes (43) via a connecting air pipe (45). The lower left side of the rear end of the second collection box (41) is connected to a second drainage pipe (46), and a third valve (47) is installed on the second drainage pipe (46).

2. The etching device for circuit board manufacturing according to claim 1, characterized in that: The cleaning box (21) and the corrosion box (20) have the same specifications and sizes, and both the cleaning box (21) and the corrosion box (20) are compatible with the box cover (11).

3. The etching device for circuit board manufacturing according to claim 2 is characterized in that: The bottom side of the left end of the corrosion box (20) is connected to a drain pipe (34), and a first valve (35) is installed on the drain pipe (34). The upper side of the rear end of the corrosion box (20) is fixedly connected to a first collection box (36), and the right end of the first collection box (36) is fixedly connected to the upper side of the left end of the cleaning box (21).

4. The etching device for circuit board manufacturing according to claim 3 is characterized in that: The bottom side of the rear end of the cleaning box (21) is connected to a first drainage pipe (37), and a second valve (38) is installed on the first drainage pipe (37).

5. The etching device for circuit board manufacturing according to claim 4 is characterized in that: The four corners of the bottom end of the workbench (1) are all fixedly connected with supporting legs (39).

6. The etching device for circuit board manufacturing according to claim 5, characterized in that: A protection box (40) is installed on the top of each box cover (11), and the protection box (40) is located outside the second motor (18) and the slide rod (12).

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