PCB etching device and etching method

Abstract

The invention relates to the technical field of PCB etching, in particular to a PCB etching device and method, and the device comprises a box body which is used for containing an etching solution; the conveying mechanism is used for vertically conveying the PCBs; the spraying mechanism is used for spraying etching liquid to the two sides of the PCB; the dehumidification mechanism is used for erasing residual etching liquid on the PCB; the reciprocating mechanism is used for driving the spraying mechanism to do reciprocating motion; the conveying mechanism comprises two guide wheel devices which are symmetrical up and down, and one guide wheel device is connected with a driving device. According to the PCB etching device and etching method, the PCB can be conveyed in a vertical state by arranging the conveying mechanism, so that the contact time of the etching liquid and the two sides of the PCB is the same, the etching effects of the two sides of the PCB are more synchronous, the etching liquid can be sprayed to the two sides of the PCB at the same time through the spraying mechanism, the PCB can receive the etching liquid at the same time, and the etching efficiency of the PCB is improved. And the etching synchronism of the two sides of the PCB is ensured, so that the etching efficiency and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of PCB etching, and in particular to a PCB etching device and an etching method. Background Art

[0002] PCB circuit board is an important electronic component, a support for electronic components, and a carrier for the electrical connection of electronic components. The etching of PCB board is to etch away the unprotected non-conductive copper part on the graphic circuit board made in the previous process to form a circuit.

[0003] At present, etching is performed by placing the PCB board flat on a conveying device and then spraying etching liquid on the upper and lower sides of the PCB board. During the etching process, the etching liquid above the PCB board has poor fluidity, and the liquid that has reacted will accumulate on the PCB board, affecting the effect of the new etching liquid contacting the upper surface of the PCB board. The etching liquid above the PCB board will quickly detach from the board surface under the action of gravity, resulting in the etching liquid being unable to fully react with the PCB board. When etching is performed in a traditional way, the upper and lower sides of the PCB board are in contact with the etching liquid for different times, resulting in different etching effects on both sides of the PCB board, making it difficult to ensure the etching quality. In view of this, we propose a PCB etching device and etching method. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a PCB etching device and an etching method, which solves the problem that the etching effects on both sides of the PCB board cannot be synchronized.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present invention provides a PCB etching device, comprising a box body for containing etching liquid;

[0006] Conveying mechanism, used for vertically conveying PCB boards;

[0007] Spraying mechanism, used to spray etching liquid on both sides of the PCB board;

[0008] Dehumidification mechanism, used to wipe off the residual etching liquid on the PCB board;

[0009] A reciprocating mechanism, used for driving the spray mechanism to perform reciprocating motion;

[0010] The conveying mechanism comprises two guide wheel devices which are symmetrical up and down, and one of the guide wheel devices is connected to a driving device.

[0011] Preferably, the guide wheel device includes a support frame with one side fixedly connected to the inner wall of the box, and two cross plates are fixedly connected to the other side of the support frame. The cross plates are rotatably connected to a plurality of transverse guide wheels through sleeves. The plurality of transverse guide wheels are distributed in a line at equal distances along the length direction of the box, and two adjacent sleeves are connected by belt drive.

[0012] Preferably, a vertical plate is fixedly connected to one side of the support frame, and the vertical plate is rotatably connected to a plurality of longitudinal guide wheels via a driving shaft, and the plurality of longitudinal guide wheels are distributed in a straight line at equal distances along the length direction of the box body.

[0013] Preferably, the driving device comprises a supporting plate whose bottom end is fixedly connected to the transverse plate, a motor is fixedly mounted on the supporting plate, and an output end of the motor is fixedly connected to one of the driving shafts.

[0014] Preferably, the driving device further comprises a plurality of gear sets which are equally spaced and arranged in a straight line;

[0015] The gear set comprises a first bevel gear and a second bevel gear meshing with each other, the first bevel gear is fixedly connected to the driving shaft, and the second bevel gear is fixedly connected to the sleeve.

[0016] Preferably, the spray mechanism includes a liquid inlet pipe, one end of which is used to connect to an external liquid pump, the other end of the liquid inlet pipe is forked and both forked ends are connected to a transverse pipe, two transverse pipes are connected to a plurality of connecting pipes, the connecting pipes on the two transverse pipes are distributed at intervals, and each connecting pipe is connected to two vertical pipes, and spray holes are opened on opposite sides of the two vertical pipes.

[0017] Preferably, the reciprocating mechanism comprises a swing rod, the swing rod is rotatably connected to the support frame through a connecting shaft, both ends of the swing rod are fixedly connected to guide rods, the surface of the guide rod is transmission-connected to a guide frame, the two guide frames are respectively fixedly connected to two transverse tubes, a through slot is provided on the guide frame, and one end of the guide rod is movably inserted into the through slot;

[0018] A limiting rod is slidably connected to the inner wall of the guide frame, one end of the limiting rod is fixedly connected to the transverse plate, and the limiting rod and the transverse plate are elastically connected via a spring.

[0019] Preferably, the reciprocating mechanism further comprises a transmission rod having one end rotatably connected to the connecting pipe, and the other end of the transmission rod is rotatably connected to an end face of the driving shaft.

[0020] Preferably, the dehumidification mechanism comprises two connection seats fixedly connected to one side of the box body, and a dehumidification cylinder is rotatably mounted on the connection seat;

[0021] A liquid receiving box is arranged at the bottom of the dehumidification cylinder, and the liquid receiving box is installed on one side of the box body.

[0022] A second aspect of an embodiment of the present invention provides a PCB etching method, which is implemented by the PCB etching device, and includes the following steps:

[0023] Step 1: Clamping and positioning: vertically insert the PCB to be processed between two sets of guide wheel devices, and the guide wheel devices clamp and position the upper and lower ends and sides of the PCB;

[0024] Step 2: Conveying: Start the driving device, which controls the guide wheel device to operate and convey the vertical PCB board in a specified direction;

[0025] Step 3: Spray etching: Spray the etching liquid onto both sides of the PCB board being transported through the spray mechanism, so that both sides of the PCB board are etched synchronously;

[0026] Step 4: Eliminate the error. The reciprocating mechanism is used to control the spray mechanism to reciprocate up and down, so that the etching liquid is in uniform contact with all parts of the PCB board to eliminate the etching error.

[0027] Step 5: Discharging: The etched PCB board is transported out of the device through one end of the device, and contacts the dehumidification mechanism during transportation to wipe off the residual etching liquid.

[0028] By means of the above technical solution, the present invention provides a PCB etching device and etching method, which have at least the following beneficial effects:

[0029] (1) The PCB etching device and etching method can transport the PCB in a vertical state by setting a conveying mechanism, so that the contact time between the etching liquid and the two sides of the PCB is the same, making the etching effect on the two sides of the PCB more synchronized. The etching liquid can be sprayed on both sides of the PCB at the same time through the spraying mechanism, so that the PCB can receive the etching liquid at the same time, ensuring the synchronization of etching on both sides of the PCB, thereby improving the etching efficiency and quality.

[0030] (2) The PCB etching device and etching method can clamp and guide the PCB by means of two sets of symmetrically arranged transverse guide wheels, and can contact the top and bottom surfaces of the PCB by means of longitudinal guide wheels, thereby achieving positioning of the PCB and preventing the PCB from shifting, thereby ensuring that the two side surfaces of the PCB can contact the etching liquid more evenly.

[0031] (3) The PCB etching device and etching method can drive the vertical pipe to reciprocate up and down by setting a reciprocating mechanism, thereby increasing the spraying range, making the spraying of the etching liquid more uniform, and improving the quality of etching. By setting a dehumidification mechanism, the residual etching liquid on the surface of the PCB board can be wiped off, so that the PCB board can better enter the next process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0033] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0034] Figure 2 is a cross-sectional view of a box body in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram of the top structure of the box body in the first embodiment of the present invention;

[0036] Figure 4 It is a schematic diagram of a part of the structure in the first embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of a guide wheel device in Embodiment 1 of the present invention;

[0038] Figure 6 Schematic diagram of the reciprocating mechanism in the first embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of a transmission rod in Embodiment 1 of the present invention;

[0040] Figure 8 Schematic diagram of two groups of horizontal pipes, connecting pipes and vertical pipes in Embodiment 1 of the present invention;

[0041] Fig. 9 This is a schematic diagram of a group of horizontal pipes, connecting pipes and vertical pipes in Example 1 of the present invention.

[0042] In the figure: 1. box body; 2. conveying mechanism; 21. guide wheel device; 211. support frame; 212. horizontal plate; 213. sleeve; 214. horizontal guide wheel; 215. vertical plate; 216. driving shaft; 217. longitudinal guide wheel; 22. driving device; 221. supporting plate; 222. motor; 223. first bevel gear; 224. second bevel gear; 3. spray mechanism; 31. liquid inlet pipe; 32. horizontal pipe; 33. connecting pipe; 34. vertical pipe; 4. dehumidification mechanism; 41. liquid receiving box; 42. connecting seat; 43. dehumidification cylinder; 5. reciprocating mechanism; 51. connecting shaft; 52. swing rod; 53. guide frame; 54. guide rod; 55. limit rod; 56. transmission rod. DETAILED DESCRIPTION

[0043] 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.

[0044] Embodiment 1

[0045] See also Figure 1-Figure 9 , a technical solution provided by the present invention:

[0046] A PCB etching device and etching method, comprising a box 1 for containing etching liquid;

[0047] Conveying mechanism 2, used for vertically conveying PCB boards;

[0048] The spray mechanism 3 is used to spray etching liquid on both sides of the PCB board;

[0049] Dehumidification mechanism 4, used to wipe off the residual etching liquid on the PCB board;

[0050] The reciprocating mechanism 5 is used to drive the spraying mechanism 3 to perform reciprocating motion;

[0051] Specifically, the conveying mechanism 2 in this embodiment includes two upper and lower symmetrical guide wheel devices 21, which are in contact with the upper and lower ends of the PCB board respectively, and clamp, limit, guide and convey the upper and lower ends of the PCB board, so that the PCB board moves along a specified track in a vertical state. A driving device 22 is connected to one of the guide wheel devices 21 to provide driving force for conveying the PCB board.

[0052] Furthermore, the guide wheel device 21 includes a support frame 211 fixedly connected to the inner wall of the box body 1 on one side, and two transverse plates 212 fixedly connected to the other side of the support frame 211, which are used to provide support force for the guide wheel device 21. The transverse plate 212 is rotatably connected to a plurality of transverse guide wheels 214 through a sleeve 213, and the plurality of transverse guide wheels 214 are distributed in a straight line with equal distances along the length direction of the box body 1. There are two transverse plates 212, and the transverse guide wheels 214 have two groups and are symmetrically arranged. The distance between the two groups of transverse guide wheels 214 is the same as the thickness of the PCB board, and can contact the two opposite sides of the PCB board respectively to achieve clamping and guiding of the PCB board. Through the two groups of transverse guide wheels 214 distributed in a straight line with equal distances, the PCB board can be stably transported. Two adjacent sleeves 213 are connected by belt transmission, so that multiple PCB boards can rotate synchronously, further providing transportation stability.

[0053] Combination Figure 5 and Figure 6As shown, a vertical plate 215 is fixedly connected to one side of the support frame 211, and a plurality of longitudinal guide wheels 217 are rotatably connected to the inner wall of the vertical plate 215 via a driving shaft 216. The plurality of longitudinal guide wheels 217 are evenly distributed in a line along the length direction of the box body 1. The longitudinal guide wheels 217 are used to contact the top surface or the bottom surface of the PCB board to achieve positioning of the PCB board, avoid deviation of the PCB board, and thereby ensure that its two side surfaces can be more evenly contacted with the etching liquid.

[0054] Please continue reading Figure 5 and Figure 6 The driving device 22 includes a support plate 221 whose bottom end is fixedly connected to the horizontal plate 212, and a motor 222 is fixedly installed on the support plate 221. The output end of the motor 222 is fixedly connected to one of the driving shafts 216, which is used to drive the driving shaft 216 to rotate and provide power for the rotation of the longitudinal guide wheel 217. The driving device 22 also includes a plurality of gear sets that are distributed in a straight line at equal distances; specifically, the gear set includes a first bevel gear 223 and a second bevel gear 224 that mesh with each other, the first bevel gear 223 is fixedly connected to the driving shaft 216, and the second bevel gear 224 is fixedly connected to the sleeve 213. When the motor 222 is started, a longitudinal guide wheel 217 can be driven to rotate through the driving shaft 216 connected thereto, and the longitudinal guide wheel 217 drives the sleeve 213 to rotate through the meshing of the first bevel gear 223 and the second bevel gear 224, thereby driving the transverse guide wheel 214 connected to the sleeve 213 to rotate. Since the multiple sleeves 213 are driven by belts, when one of the sleeves 213 rotates, the multiple sleeves 213 will rotate together, thereby causing the multiple transverse guide wheels 214 to rotate synchronously. The transverse guide wheels 214 drive the corresponding longitudinal guide wheels 217 to rotate in the opposite direction through the gear set, so that the multiple transverse guide wheels 214 and the multiple longitudinal guide wheels 217 rotate synchronously, thereby ensuring the stability of the PCB board transportation.

[0055] As an embodiment, the spray mechanism 3 includes a liquid inlet pipe 31, one end of which is used to connect to an external liquid pump to provide etching liquid to the spray mechanism 3, and the other end of the liquid inlet pipe 31 is forked and both forked ends are connected to a horizontal pipe 32, and both horizontal pipes 32 are connected to a plurality of connecting pipes 33, and the plurality of connecting pipes 33 are distributed in a straight line with equal distances. The connecting pipes 33 on the two horizontal pipes 32 are distributed at intervals, and each connecting pipe 33 is connected to two vertical pipes 34, and spray holes are opened on the opposite sides of the two vertical pipes 34 to spray the two sides of the PCB board respectively, and the number of the spray holes is multiple, and the plurality of spray holes are distributed in a straight line with equal distances along the length direction of the vertical pipe 34 to increase the range of the etching liquid spraying, so that the two sides of the PCB board are in more uniform contact with the etching liquid.

[0056] As an embodiment, the reciprocating mechanism 5 includes a swing rod 52, which is rotatably connected to the support frame 211 through a connecting shaft 51, so that the swing rod 52 can rotate relative to the support frame 211, and both ends of the swing rod 52 are fixedly connected to guide rods 54, and the surface of the guide rod 54 is transmission-connected to a guide frame 53, and the two guide frames 53 are respectively fixedly connected to the two transverse tubes 32. Specifically, a through groove is provided on the guide frame 53, and one end of the guide rod 54 is movably inserted in the through groove to avoid motion interference. When the swing rod 52 rotates around the connecting shaft 51, the guide frame 53 can be driven to move up and down through the guide rod 54, and then the vertical tube 34 can be driven to move up and down through the transverse tube 32, so that the etching liquid is sprayed more evenly. A limit rod 55 is slidably connected to the inner wall of the guide frame 53, and one end of the limit rod 55 is fixedly connected to the cross plate 212 for limiting the guide frame 53 to prevent the guide frame 53 from swinging with the swing rod 52, and the limit rod 55 is elastically connected to the cross plate 212 via a spring.

[0057] In addition, the reciprocating mechanism 5 further includes a transmission rod 56, one end of which is rotatably connected to the connecting tube 33, and the other end of the transmission rod 56 is rotatably connected to one end surface of the driving shaft 216. When the driving shaft 216 rotates, the connecting tube 33 is driven to move up and down through the transmission rod 56, and the connecting tube 33 drives the horizontal tube 32 connected thereto to move up and down, and when the horizontal tube 32 moves up and down, it synchronously drives the guide frame 53 to move up and down, thereby causing the swing rod 52 to swing around the connecting shaft 51, providing power for the operation of the reciprocating mechanism 5.

[0058] Combination Figure 2 and Figure 3 As shown, the dehumidification mechanism 4 includes two connection seats 42 fixedly connected to one side of the box body 1, and a dehumidification cylinder 43 is rotatably mounted on the connection seat 42. There is a gap between the two dehumidification cylinders 43 for the PCB board to pass through. When the PCB board passes through, the dehumidification cylinder 43 can wipe off the etching liquid remaining on its surface. A liquid receiving box 41 is arranged at the bottom of the dehumidification cylinder 43, and the liquid receiving box 41 is installed on one side of the box body 1. When there is too much liquid on the dehumidification cylinder 43, it can be squeezed, and the squeezed liquid will enter the liquid receiving box 41 for collection.

[0059] When the PCB etching device of the present invention is used, an etching liquid is pumped into the liquid inlet pipe 31 through an external liquid pump, and the etching liquid enters the two rows of vertical pipes 34 through two horizontal pipes 32 and multiple connecting pipes 33, and is sprayed out from multiple spray holes on the surface of the vertical pipes 34. The spray holes on the two rows of vertical pipes 34 are arranged relatively to each other, and can spray both sides of the PCB board at the same time. At the same time, the motor 222 is started, so that the output end of the motor 222 drives one of the driving shafts 216 to rotate, and the driving shaft 216 synchronously drives the first bevel gear 223 thereon to rotate, and the first bevel gear 223 drives the second bevel gear 224 to rotate through meshing, and the second bevel gear 224 synchronously drives the sleeve 213 thereon to rotate, and the sleeve 213 drives other adjacent sleeves 213 to rotate through belt transmission, so that a row of driving shafts 216 and a row of sleeves 213 rotate simultaneously, and then drives a row of longitudinal guide wheels 217 and a row of transverse guide wheels 214 to rotate synchronously.

[0060] During the rotation of the drive shaft 216, the connecting tube 33 is driven to move up and down through the transmission rod 56, and the connecting tube 33 synchronously drives part of the vertical tubes 34 and one of the horizontal tubes 32 to move up and down. When the horizontal tube 32 moves up and down, it synchronously drives the guide frame 53 to move up and down. The guide frame 53 drives the swinging rod 52 to swing around the connecting shaft 51 through the guide rod 54 arranged therein. When the swinging rod 52 swings, the rotation directions of the two ends are opposite. Therefore, the other end of the swinging rod 43 drives the other guide frame 53 to move in the opposite direction through another guide rod 54, so that the horizontal tube 32 fixedly connected to the guide frame 53 moves in the opposite direction. The horizontal tube 32 drives another part of the vertical tubes 34 to move in the opposite direction through multiple connecting tubes 32, thereby making the vertical tubes 34 adjacent along the length direction of the horizontal tube 32 move in opposite directions, while the vertical tubes 34 spaced apart move in the same direction, and the two vertical tubes 34 symmetrically arranged in front and back relative to the PCB board move in the same direction. In this way, the gap of the spray can be eliminated to the greatest extent, so that the contact between the two sides of the PCB board and the etching liquid is more uniform, and the etching effect is better.

[0061] During the etching process, the PCB board to be etched is inserted into the box body 1 from the feed port at one end of the box body 1, and the longitudinal guide wheel 217 and one row of transverse guide wheels 214 drive the PCB board to move. During the movement, the upper and lower ends of the PCB board are respectively in contact with the outer peripheral walls of the two rows of longitudinal guide wheels 217, and the left and right sides of the PCB board are in contact with the outer peripheral walls of the four rows of transverse guide wheels 214, so that it can always maintain a vertical state during movement to prevent it from tilting. During the movement of the PCB board, since the PCB board enters the etching device vertically, after the etching liquid is sprayed on both sides of the PCB board, it will quickly flow downward under the action of gravity and re-enter the box body 1. Compared with conventional transverse spraying, it can effectively prevent the etching liquid from remaining on the PCB board, so that the surface of the PCB board can continuously contact with new etching liquid, improve etching efficiency, and ensure etching effect. Finally, the PCB board is transported out of the box body 1 from the discharge port at the other end of the box body 1. During the movement, the PCB board contacts the two dehumidification cylinders 34 to wipe off the residual etching liquid on its surface, so that the PCB board can enter the next process.

[0062] Embodiment 2

[0063] The present invention also provides a PCB etching method, which is implemented by the PCB etching device in the first embodiment. The method specifically comprises the following steps:

[0064] Step 1: Clamping and positioning: vertically insert the PCB to be processed between the two sets of guide wheel devices 21, and the guide wheel devices 21 clamp and position the upper and lower ends and the side of the PCB;

[0065] Step 2: conveying: start the driving device 22, and the driving device 22 controls the guide wheel device 21 to operate, so as to convey the vertical PCB board in a specified direction;

[0066] Step 3: spray etching, spraying etching liquid to both sides of the PCB board being transported through the spray mechanism 3 at the same time, so that both sides of the PCB board are etched synchronously;

[0067] Step 4: Eliminate the error. The reciprocating mechanism 5 controls the spray mechanism 3 to reciprocate up and down so that the etching liquid is in uniform contact with all parts of the PCB board to eliminate the etching error.

[0068] Step 5: Discharging: The etched PCB board is transported out of the device through one end of the device, and contacts the dehumidification mechanism 4 during transportation to wipe off the residual etching liquid.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] 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. A PCB etching device, characterized in that: include: A box (1) for containing etching liquid; A conveying mechanism (2), used for vertically conveying PCB boards; A spray mechanism (3), used for spraying etching liquid on both sides of the PCB board; A dehumidification mechanism (4) is used to wipe off the residual etching liquid on the PCB board; A reciprocating mechanism (5) for driving the spraying mechanism (3) to perform reciprocating motion; The conveying mechanism (2) comprises two guide wheel devices (21) which are symmetrical in upper and lower directions, and a driving device (22) is connected to one of the guide wheel devices (21).

2. The PCB etching device according to claim 1, characterized in that: The guide wheel device (21) comprises a support frame (211) with one side fixedly connected to the inner wall of the box body (1); the other side of the support frame (211) is fixedly connected to two transverse plates (212); the transverse plates (212) are rotatably connected to a plurality of transverse guide wheels (214) via sleeves (213); the plurality of transverse guide wheels (214) are distributed in a straight line at equal distances along the length direction of the box body (1), and two adjacent sleeves (213) are connected via belt transmission.

3. The PCB etching device according to claim 2, characterized in that: A vertical plate (215) is fixedly connected to one side of the support frame (211); the vertical plate (215) is rotatably connected to a plurality of longitudinal guide wheels (217) via a driving shaft (216); and the plurality of longitudinal guide wheels (217) are equidistantly distributed in a straight line along the length direction of the box body (1).

4. The PCB etching device according to claim 3, characterized in that: The driving device (22) comprises a supporting plate (221) whose bottom end is fixedly connected to the transverse plate (212); a motor (222) is fixedly mounted on the supporting plate (221); and an output end of the motor (222) is fixedly connected to one of the driving shafts (216).

5. The PCB etching device according to claim 5, characterized in that: The driving device (22) further comprises a plurality of gear sets which are equidistantly distributed in a straight line; The gear set comprises a first bevel gear (223) and a second bevel gear (224) meshing with each other, the first bevel gear (223) being fixedly connected to the drive shaft (216), and the second bevel gear (224) being fixedly connected to the sleeve (213).

6. The PCB etching device according to claim 2, characterized in that: The spray mechanism (3) comprises a liquid inlet pipe (31), one end of which is used to be connected to an external liquid pump, the other end of which is forked and both forked ends are connected to a transverse pipe (32), two transverse pipes (32) are connected to a plurality of connecting pipes (33), the connecting pipes (33) on the two transverse pipes (32) are spaced apart, and each connecting pipe (33) is connected to two vertical pipes (34), and spray holes are provided on opposite sides of the two vertical pipes (34).

7. The PCB etching device according to claim 6, characterized in that: The reciprocating mechanism (5) comprises a swing rod (52), the swing rod (52) is rotatably connected to the support frame (211) via a connecting shaft (51), both ends of the swing rod (52) are fixedly connected to guide rods (54), the surface of the guide rod (54) is drivingly connected to a guide frame (53), the two guide frames (53) are respectively fixedly connected to two transverse tubes (32), a through slot is provided on the guide frame (53), and one end of the guide rod (54) is movably inserted into the through slot; A limiting rod (55) is slidably connected to the inner wall of the guide frame (53), one end of the limiting rod (55) is fixedly connected to the transverse plate (212), and the limiting rod (55) and the transverse plate (212) are elastically connected via a spring.

8. The PCB etching device according to claim 7, characterized in that: The reciprocating mechanism (5) further comprises a transmission rod (56) having one end rotatably connected to the connecting tube (33), and the other end of the transmission rod (56) is rotatably connected to an end surface of the driving shaft (216).

9. The PCB etching device according to claim 1, characterized in that: The dehumidification mechanism (4) comprises two connection seats (42) fixedly connected to one side of the box body (1), and a dehumidification cylinder (43) is rotatably mounted on the connection seat (42); A liquid receiving box (41) is provided at the bottom of the dehumidification cylinder (43), and the liquid receiving box (41) is installed on one side of the box body (1).

10. A PCB etching method, implemented by the PCB etching device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Clamping and positioning: vertically insert the PCB board to be processed between the two sets of guide wheel devices (21), and the guide wheel devices (21) clamp and position the upper and lower ends and the side of the PCB board; Step 2: conveying: starting the driving device (22), the driving device (22) controls the guide wheel device (21) to operate, and conveys the PCB board in a vertical state along a specified direction; Step 3: spray etching, spraying etching liquid onto both sides of the PCB board being transported through the spray mechanism (3) at the same time, so that both sides of the PCB board are etched synchronously; Step 4: Eliminate errors. The reciprocating mechanism (5) controls the spray mechanism (3) to reciprocate up and down so that the etching liquid is in uniform contact with all parts of the PCB board, thereby eliminating etching errors. Step 5: Discharging: The etched PCB board is transported out of the device through one end of the device, and during the transportation process, it comes into contact with the dehumidification mechanism (4) to wipe off the residual etching liquid.

Images