Automatic etching machine for PCB production

Abstract

The invention relates to the technical field of PCB production, and particularly discloses an automatic etching machine for PCB production, which comprises a machine body, a double-sided conveyor belt and two groups of spraying frames are arranged in the machine body, and the double-sided conveyor belt penetrates through the left side and the right side of the machine body; the spraying frame comprises two frame bodies which are symmetrically arranged on the upper side and the lower side of the double-face conveying belt respectively, and a plurality of spraying nozzles are arranged on the end faces, facing the double-face conveying belt, of the two frame bodies in an array mode. A liquid distribution pipe is fixed to the upper end face of the machine body and communicates with the multiple nozzles through pipelines, and pressure sensors are arranged at the outer ends of the multiple pipelines connecting the nozzles and the liquid distribution pipe. According to the spraying device, the structural design that one liquid conveying pipeline corresponds to one spraying nozzle is adopted, so that the consistency of the pressure of liquid in the spraying nozzles is improved, the lifting mechanism is arranged, the distance between the spraying frame and the double-face conveying belt can be adjusted, and more accurate etching depth control is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB production, and particularly relates to an automatic etching machine for PCB production. Background Art

[0002] In PCB production, the etching process is a crucial link. Its purpose is to remove the unnecessary copper foil on the copper clad laminate through chemical etching to form the circuit pattern required by the design. The etching process is usually completed by an etching machine, and the spraying system in the etching machine plays an important role in the etching quality and efficiency.

[0003] Most of the traditional etching machine spray racks are set at a fixed spacing. However, the specifications of different PCB products vary greatly, and the line density and etching process parameter requirements are different. The spray rack with a fixed spacing is difficult to meet the diverse production needs. If the spacing is too small, the impact of the etching solution spray is large and the coverage uniformity is low, which easily leads to problems such as over-etching. If the spacing is too large, the distribution of the etching solution is dispersed and the etching rate is slow, making it difficult to accurately control the etching depth. In addition, most of the current etching machines use a single supply pipeline to supply multiple nozzles, which is difficult to ensure the same pressure for each nozzle and easily affects the etching accuracy. Therefore, those skilled in the art have provided an automatic etching machine for PCB production to solve the problems raised in the above background art. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic etching machine for PCB production to solve the above technical problems.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An automatic etching machine for PCB production includes a machine body. Inside the machine body, there is a double-sided conveyor belt and two groups of spray racks, and the double-sided conveyor belt runs through the left and right sides of the machine body;

[0007] Each spray rack includes two frames, which are symmetrically arranged on the upper and lower sides of the double-sided conveyor belt respectively. On the end faces of the two frames facing the double-sided conveyor belt, a plurality of nozzles are arranged in an array;

[0008] A liquid distribution pipe is fixed on the upper end face of the machine body. The liquid distribution pipe is connected to a plurality of nozzles through pipelines. Pressure sensors are arranged at the outer ends of the pipelines connecting the nozzles and the liquid distribution pipe. The pressure sensors are fixed on the upper end face of the machine body through mounting frames. The mounting frames are fixed with a plurality of display screens electrically connected to the pressure sensors, and the display screens are used to display the data of the pressure sensors;

[0009] An elevating mechanism connected to the spray rack is arranged inside the machine body, and the elevating mechanism is used to adjust the distance between the spray rack and the double-sided conveyor belt.

[0010] Furthermore, on both sides of the inside of the machine body where the spray rack is located, a connecting rack and two sliding grooves are provided. The connecting rack is slidably connected to the machine body through a guide rail. The two sliding grooves are arranged vertically. The upper sliding groove is slidably connected to the machine body through a guide rail, and the lower sliding groove is fixed to the connecting rack.

[0011] Furthermore, the lifting mechanism includes two worm and gear lifting platforms one and two fixed on the upper end surface of the machine body. The lifting ends of the two worm and gear lifting platforms one and two are respectively fixed to the connecting rack below them and the sliding groove slidably connected to the machine body. A transmission shaft is connected between the opposite worm and gear lifting platforms one and two. The lifting mechanism further includes two motors one. The motor one drives the corresponding worm and gear lifting platform one through a synchronous belt drive assembly.

[0012] Furthermore, two rollers are rotatably connected to both sides of the frame body. The rollers are slidably connected to the sliding groove. The spray rack is connected with a swinging mechanism, and the swinging mechanism is used to drive the spray rack to swing.

[0013] Furthermore, the swinging mechanism includes a swinging shaft rotatably connected inside the machine body. The swinging shaft is driven by a motor two fixed to the outer end of the machine body. Two eccentric wheels are slidably sleeved on the outer end of the swinging shaft. A swinging sleeve is rotatably sleeved on the outer end of the eccentric wheel. The swinging sleeve is connected with a connecting shaft through a coupling, and one end of the connecting shaft is rotatably connected to the frame body.

[0014] Furthermore, a liquid tank is fixed to the rear end face of the machine body. A plurality of liquid pumps are fixed to the upper end face of the liquid tank. The liquid pumps are communicated with a liquid distribution pipe through pipelines:

[0015] 1. For an automatic etching machine for PCB production proposed by the present invention, a structure design of one liquid infusion pipeline corresponding to one nozzle is adopted, so as to improve the consistency of the liquid pressure in each nozzle. At the same time, a pressure sensor is arranged on the liquid passing pipeline of each nozzle, and a display screen is provided to display the data of each pressure sensor, so that the pressure in each nozzle pipeline can be quickly and real-time understood, and abnormal conditions can be quickly adjusted, thus ensuring the consistency of etching.

[0016] 2. For an automatic etching machine for PCB production proposed by the present invention, a lifting mechanism is provided, which can adjust the distance between the spray rack and the double-sided conveyor belt. By adjusting the spacing, more precise control of the etching depth can be achieved, and the etching liquid can be evenly distributed in the area to be etched according to the size, shape and etching requirements of the PCB board, improving the etching quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is the front perspective view of an automatic etching machine for PCB production proposed by the present invention;

[0019] Figure 2 is the front view of an automatic etching machine for PCB production proposed by the present invention;

[0020] Figure 3 is the rear perspective view of an automatic etching machine for PCB production proposed by the present invention;

[0021] Figure 4 is the connection structure diagram of the spray rack in an automatic etching machine for PCB production proposed by the present invention;

[0022] Figure 5 is the structure diagram of the lifting mechanism in an automatic etching machine for PCB production proposed by the present invention;

[0023] Figure 6 is the structure diagram of the swing mechanism in an automatic etching machine for PCB production proposed by the present invention.

[0024] Reference numerals:

[0025] 1, body; 2, double-sided conveyor belt; 3, mounting frame; 4, display screen; 5, pressure sensor; 6, spray rack; 61, rack body; 62, nozzle; 63, roller; 7, liquid pump; 8, lifting mechanism; 81, motor 1; 82, synchronous belt drive assembly; 83, worm and gear lifting platform 1; 84, transmission shaft; 85, worm and gear lifting platform 2; 9, liquid distribution pipe; 10, swing mechanism; 101, motor 2; 102, swing shaft; 103, eccentric wheel; 104, swing sleeve; 105, connecting shaft; 11, liquid tank; 12, connecting frame; 13, sliding groove; 14, guide rail. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to the attached Figures 1 to 2As shown in the figure, an automatic etching machine for PCB production in an embodiment of the present invention includes a machine body 1. Inside the machine body 1, there are a double-sided conveyor belt 2 and two spray racks 6. The double-sided conveyor belt 2 runs through the left and right sides of the machine body 1. The double-sided conveyor belt 2 is of a double conveyor belt structure in the prior art. When conveying, the PCB board is conveyed through the middle of the conveyor belt and passes through the two spray racks 6. The spray racks 6 spray the etching solution onto the surface of the PCB board in a spraying manner to remove the unnecessary copper foil, thereby forming a designed circuit pattern.

[0029] Specifically, the spray rack 6 includes two rack bodies 61, which are symmetrically arranged on the upper and lower sides of the double-sided conveyor belt 2 respectively. On the end faces of the two rack bodies 61 facing the double-sided conveyor belt 2, a plurality of nozzles 62 are arranged in an array. The etching solution is sprayed onto the double-sided conveyor belt 2 through the nozzles 62 arranged in an array, and double-sided spraying is carried out, with sufficient spraying pipe effect and high efficiency.

[0030] Among them, a liquid distribution pipe 9 is fixed on the upper end face of the machine body 1. The liquid distribution pipe 9 is connected to a plurality of nozzles 62 through pipelines. Pressure sensors 5 are arranged at the outer ends of the pipelines connecting the plurality of nozzles 62 and the liquid distribution pipe 9. The pressure sensors 5 are fixed on the upper end face of the machine body 1 through mounting brackets 3. The mounting brackets 3 are fixed with a plurality of display screens 4 electrically connected to the pressure sensors 5. The display screens 4 are used to display the data of the pressure sensors 5; inside the machine body 1, there is a lifting mechanism 8 connected to the spray rack 6. The lifting mechanism 8 is used to adjust the distance between the spray rack 6 and the double-sided conveyor belt 2. Different from the traditional structure of one pipeline with multiple spray ports, in the present invention, a structure design of one infusion pipeline corresponding to one nozzle 62 is adopted, so as to improve the consistency of the liquid pressure in each nozzle 62. At the same time, pressure sensors 5 are arranged on the liquid supply pipelines of each nozzle 62, and display screens 4 are arranged to display the data of each pressure sensor 5, so that the pressure in the pipelines of each nozzle 62 can be quickly and real-time understood, and abnormal conditions can be quickly adjusted, so as to ensure the stable liquid outlet pressure of each nozzle 62 and ensure the consistency of subsequent etching.

[0031] It should be noted that valves (not shown in the figure) are arranged on the connecting pipelines of each liquid distribution pipe 9 and the nozzles 62, and the liquid flow can be controlled through the valves to adjust the pressure;

[0032] In addition, a single display screen 4 can correspond to multiple pressure sensors 5 and display the data of multiple pressure sensors 5 at the same time, saving costs.

[0033] In this embodiment, a liquid tank 11 is fixed on the rear end face of the machine body 1. A plurality of liquid pumps 7 are fixed on the upper end face of the liquid tank 11. The liquid pumps 7 are connected to the liquid distribution pipe 9 through pipelines, and the etching solution in the liquid tank 11 is pumped to the liquid distribution pipe 9 through the liquid distribution pipe 9.

[0034] Embodiment Two

[0035] Please refer toFigures 3 to 5 As shown in the figure, on the basis of the first embodiment, connection frames 12 and two sliding grooves 13 are arranged on both sides of the spray rack 6 inside the machine body 1. The connection frame 12 is slidably connected to the machine body 1 through a guide rail 14. The two sliding grooves 13 are arranged vertically. The upper sliding groove 13 is slidably connected to the machine body 1 through a guide rail 14, and the lower sliding groove 13 is fixed to the connection frame 12.

[0036] The lifting mechanism 8 includes two worm and gear lifting platforms 83 and worm and gear lifting platforms 85 fixed to the upper end surface of the machine body 1. The lifting ends of the two worm and gear lifting platforms 83 and worm and gear lifting platforms 85 are respectively fixed to the connection frame 12 below them and the sliding groove 13 slidably connected to the machine body 1. A transmission shaft 84 is connected between the opposite worm and gear lifting platforms 83 and worm and gear lifting platforms 85. The lifting mechanism 8 also includes two motors 81. The motor 81 drives the corresponding worm and gear lifting platform 83 through a synchronous belt transmission assembly 82. When in use, driven by the motor 81, the synchronous belt transmission assembly 82 drives the worm and gear lifting platform 83. Among them, a transmission shaft 84 is connected between the input ends, that is, the worm ends, of a group of worm and gear lifting platforms 83 and worm and gear lifting platforms 85. Therefore, when the motor 81 drives, it can drive a group of worm and gear lifting platforms 83 and worm and gear lifting platforms 85 to act. The lifting ends of a group of worm and gear lifting platforms 83 and worm and gear lifting platforms 85 are fixed to the connection frame 12, and the lifting ends of the other group are fixed to the sliding groove 13 slidably connected to the machine body 1, so that the two groups of worm and gear lifting platforms 83 and worm and gear lifting platforms 85 can respectively control the distance between the upper and lower frame bodies 61 and the double-sided conveyor belt 2.

[0037] By changing the distance between the frame body 61 and the double-sided conveyor belt 2, the impact force of the nozzle 62 on the PCB board and the spraying range are adjusted. When the nozzle 62 is closer, the impact force of the spraying liquid is greater, and it can more effectively distribute the etching agent evenly on the surface of the PCB board, and make the etching agent easier to penetrate into the area to be etched, which is beneficial to the progress of the etching reaction and increases the etching depth per unit time; on the contrary, when the nozzle 62 is farther away, the spraying liquid will have a certain diffusion before reaching the surface of the PCB board, the impact force decreases, and within a unit time, the etching effect decreases and the etching depth becomes shallower, and more precise control of the etching depth can be achieved. By adjusting the distance, according to the size, shape and etching requirements of the PCB board, the etching liquid can be evenly distributed in the area to be etched, improving the etching quality.

[0038] Embodiment Three

[0039] Please refer to Figures 5 to 6As shown in the figure, on the basis of the first and second embodiments, two rollers 63 are rotatably connected to both sides of the frame body 61. The rollers 63 are slidably connected to the sliding grooves 13. The spraying frame 6 is connected with a swinging mechanism 10, and the swinging mechanism 10 is used to drive the spraying frame 6 to swing;

[0040] Specifically, the swinging mechanism 10 includes a swinging shaft 102 rotatably connected inside the machine body 1. The swinging shaft 102 is driven by a second motor 101 fixed to the outer end of the machine body 1. Two eccentric wheels 103 are slidably sleeved on the outer end of the swinging shaft 102. A swinging sleeve 104 is rotatably sleeved on the outer end of the eccentric wheel 103. The swinging sleeve 104 is connected with a connecting shaft 105 through a coupling. One end of the connecting shaft 105 is rotatably connected to the frame body 61. By driving the swinging shaft 102 to rotate through the second motor 101, the two eccentric wheels 103 are driven to rotate. Among them, the swinging sleeve 104 is rotatably sleeved on the outer end of the eccentric wheel 103, and the connecting shaft 105 fixed to the outer end of the swinging sleeve 104 is rotatable with the frame body 61. Therefore, when the eccentric wheel 103 rotates, the connecting shaft 105 can be driven to swing, and the frame body 61 is slidably connected to the sliding groove 13 through the roller 63, so as to drive the frame body 61 to swing, making the distribution of the etching solution more uniform on the entire surface of the PCB board during spraying, and also enhancing the flushing effect and improving the working efficiency.

[0041] It should be noted that the eccentric wheel 103 and the swinging shaft 102 are connected by a flat key in a sliding sleeve connection. When the frame body 61 moves up and down, the position of the eccentric wheel 103 can also be changed, so as not to interfere with the movement of the frame body 61.

[0042] The above has described a specific embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An automated etching machine for PCB production, comprising a machine body (1), characterized in that: A double-sided conveyor belt (2) and two groups of spray racks (6) are arranged inside the machine body (1), and the double-sided conveyor belt (2) runs through the left and right sides of the machine body (1); The spray rack (6) comprises two racks (61) which are symmetrically arranged on the upper and lower sides of the double-sided conveyor belt (2), and the end surfaces of the two racks (61) facing the double-sided conveyor belt (2) are both provided with a plurality of nozzles (62) in an array; A liquid dispensing tube (9) is fixed to the upper end surface of the machine body (1), the liquid dispensing tube (9) is connected to a plurality of nozzles (62) through a pipeline, and a pressure sensor (5) is arranged at the outer end of the plurality of pipelines connecting the nozzles (62) and the liquid dispensing tube (9), the pressure sensor (5) is fixed to the upper end surface of the machine body (1) through a mounting frame (3), and a plurality of display screens (4) electrically connected to the pressure sensors (5) are fixed to the mounting frame (3), and the display screens (4) are used to display data of the pressure sensors (5); A lifting mechanism (8) connected to the spray rack (6) is arranged inside the machine body (1), and the lifting mechanism (8) is used to adjust the distance between the spray rack (6) and the double-sided conveyor belt (2).

2. The automatic etching machine for PCB production according to claim 1, characterized in that: A connecting frame (12) and two sliding grooves (13) are arranged on both sides of the spray frame (6) inside the body (1); the connecting frame (12) is slidably connected to the body (1) via a guide rail (14); the two sliding grooves (13) are arranged up and down; the upper sliding groove (13) is slidably connected to the body (1) via the guide rail (14), and the lower sliding groove (13) is fixed to the connecting frame (12).

3. The automatic etching machine for PCB production according to claim 2, characterized in that: The lifting mechanism (8) comprises two worm gear lifting platforms (1) (83) and two worm gear lifting platforms (85) fixed on the upper end surface of the machine body (1); the lifting ends of the two worm gear lifting platforms (83) and two worm gear lifting platforms (85) are respectively fixed to the connecting frame (12) below them and the sliding groove (13) slidably connected to the machine body (1); a transmission shaft (84) is connected between the two worm gear lifting platforms (83) and two worm gear lifting platforms (85); the lifting mechanism (8) also comprises two motors (81); the motors (81) drive the corresponding worm gear lifting platforms (83) through a synchronous belt transmission assembly (82).

4. The automatic etching machine for PCB production according to claim 2, characterized in that: Two rollers (63) are rotatably connected to both sides of the frame body (61), and the rollers (63) are slidably connected to the sliding grooves (13). The spray frame (6) is connected to a swing mechanism (10), and the swing mechanism (10) is used to drive the spray frame (6) to swing.

5. The automatic etching machine for PCB production according to claim 4, characterized in that: The swing mechanism (10) comprises a swing shaft (102) rotatably connected inside the machine body (1); the swing shaft (102) is driven by a second motor (101) fixed at the outer end of the machine body (1); the outer end of the swing shaft (102) is slidably sleeved with two eccentric wheels (103); the outer end of the eccentric wheel (103) is rotatably sleeved with a swing sleeve (104); the swing sleeve (104) is connected to a connecting shaft (105) via a coupling; one end of the connecting shaft (105) is rotatably connected to the frame body (61).

6. The automatic etching machine for PCB production according to claim 1, characterized in that: A liquid tank (11) is fixed to the rear end surface of the machine body (1), and a plurality of liquid pumps (7) are fixed to the upper end surface of the liquid tank (11). The liquid pumps (7) are connected to the liquid distribution pipe (9) through pipelines.

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