Circuit board solder resist developing device

Abstract

This utility model relates to the field of circuit board processing technology and proposes a circuit board solder resist developing device, including a base box and an upper frame. The upper frame is connected to the top of the base box, and two corresponding mounting plates are connected to the inner side wall of the upper frame. Two first drive rollers, two second drive rollers, and two third drive rollers are rotatably connected between the two mounting plates. A spray conveyor belt is driven between the two first drive rollers, and an isolation conveyor belt is driven between the two second drive rollers and the two third drive rollers. The first drive rollers are provided with a first drive sprocket and a second drive sprocket, and the second and third drive rollers are respectively provided with a first driven sprocket and a second driven sprocket. A first chain is provided between the first drive sprocket and the first driven sprocket, and a second chain is provided between the second drive sprocket and the second driven sprocket. This prevents the developing solution from being carried out and falling to the ground, thereby saving manpower.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, specifically to a circuit board solder resist developing device. Background Technology

[0002] In the surface solder resist development process of printed circuit boards (PCBs), the PCB solder resist development line is used to wash away the ink printed on the PCB surface that has not undergone polymerization reaction after the exposure process, leaving the through holes and other PA1 on the PCB to be soldered, and covering all the circuits and large copper surfaces with ink, thereby saving the amount of solder used when the customer installs components and preventing short circuits and bridging caused by wave soldering.

[0003] A search revealed that a circuit board solder resist developing device was published in China on November 22, 2024, with patent publication number CN222050712U. The device is generally described as including a transmission unit, a frame unit, and a PLC controller, as well as an infrared start / stop unit and a spray developing unit. The infrared start / stop unit includes a rotating mounting base fixedly connected to one inner wall of the frame unit, and an infrared sensor for infrared start / stop installed on the other inner wall of the frame unit. The spray developing unit includes a liquid storage cylinder fixedly connected to the center of the top of the frame unit, and a U-shaped tube installed inside the frame unit for conveying the developing solution.

[0004] While the aforementioned existing technical solutions are time-saving, labor-saving, and convenient for the developing process, the device is prone to causing the conveyor belt to carry the developing solution onto the ground, resulting in environmental pollution, making subsequent processing very troublesome, and wasting manpower. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a circuit board solder resist developing device to solve the problems mentioned in the background technology, such as the developer solution being carried out and falling onto the ground, causing environmental pollution, making subsequent processing very troublesome, and wasting manpower.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a circuit board solder resist developing device, comprising a base box and an upper frame, the upper frame being fixedly connected to the top of the base box. A liquid storage tank is installed at the top of the upper frame, and a liquid distributor is connected to the bottom of the liquid storage tank through the upper frame. Multiple evenly distributed nozzles are provided at the bottom of the liquid distributor. Two corresponding mounting plates are fixedly connected to the inner wall of the upper frame. Two first drive rollers, two second drive rollers, and two third drive rollers are rotatably connected between the two mounting plates. The two second drive rollers and two third drive rollers are respectively located on both sides of the two first drive rollers. A spray conveyor belt is drivingly connected between the two first drive rollers, and the two second drive rollers and two third drive rollers are also drivingly connected to each other. A conveyor belt is connected to the upper frame. One end of the first, second, and third drive rollers all passes through the upper frame. A mounting frame is fixedly connected to the outer wall of the upper frame. A motor connected to the first drive roller is mounted on the mounting frame. The first drive roller is equipped with a first drive sprocket and a second drive sprocket. The second and third drive rollers are respectively equipped with a first driven sprocket and a second driven sprocket. A first chain is provided between the first drive sprocket and the first driven sprocket. A second chain is provided between the second drive sprocket and the second driven sprocket. Support legs are fixedly connected to the four corners of the bottom of the bottom box. A bottom plate is fixedly connected to the bottom of the four support legs. A collection box is provided on the bottom plate. A collection pipe connecting to the inside of the bottom box is provided at the top of the collection box.

[0009] By adopting the above technical solution, the starting motor drives the first transmission roller to rotate, which in turn drives the first and second drive sprockets to rotate, thereby driving the first and second driven sprockets to rotate. The first and second driven sprockets then drive the second and third transmission rollers to rotate, thus enabling the first, second, and third transmission rollers to rotate synchronously. At this time, the circuit board is placed on the isolation conveyor belt, which then transports the circuit board to the spray conveyor belt. The developing solution sprayed from the nozzles then sprays the circuit board, which is then transported to another isolation conveyor belt and discharged. The sprayed developing solution flows down the edge of the spray conveyor belt and into the collection box through the collection pipe, thus preventing the developing solution from being carried out and falling to the ground, achieving the purpose of saving manpower.

[0010] Optionally, the liquid storage tank is provided with a transparent observation window.

[0011] By adopting the above technical solution, the transparent observation window is used to facilitate personnel to observe the liquid level in the storage tank, so as to add developer in time when the liquid level is low and avoid interruption of flow.

[0012] Optionally, two auxiliary rods are fixedly connected between the two mounting plates. The two auxiliary rods are located between the two isolation conveyor belts and the spray conveyor belt, respectively. Multiple evenly distributed arc-edge relays are fixedly connected to the top of each of the two auxiliary rods. The top of the multiple arc-edge relays is at the same horizontal height as the top of the spray conveyor belt.

[0013] By adopting the above technical solution, the auxiliary rod and the arc-edge relay are used to provide a transition between the isolation conveyor belt and the spray conveyor belt, so as to avoid the edge of the circuit board getting stuck in the gap between the isolation conveyor belt and the spray conveyor belt, thereby improving the stability of the equipment.

[0014] Optionally, a protective shell is bolted to the outer wall of the upper frame, and the motor, the first chain, and the second chain are all located inside the protective shell.

[0015] By adopting the above technical solution, the protective shell is used to protect the motor, the first chain, and the second chain, thereby reducing the probability of the equipment being damaged by impacts and thus improving the stability of the equipment.

[0016] Optionally, the lower inner side wall of the bottom box is provided with an inclined guide that cooperates with the collection pipe.

[0017] By adopting the above technical solution, the inclined guide is used to conveniently guide the developer flowing down from the spray conveyor belt to the position of the collection tube, thereby facilitating the flow of developer into the collection tank and reducing developer residue inside the equipment.

[0018] (III) Beneficial Effects

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] This circuit board solder mask developing device starts with a motor that drives a first drive roller to rotate. The first drive roller drives a first and a second drive sprocket to rotate, which in turn drives a first and a second driven sprocket. These driven sprockets then drive a second and a third drive roller to rotate, ensuring that the first, second, and third drive rollers rotate synchronously. The circuit board is then placed on an isolation conveyor belt, which transports it to a spray conveyor belt. The developing solution sprayed from the nozzles then sprays the circuit board onto another isolation conveyor belt, from which the circuit board is discharged. The sprayed developing solution flows down the edge of the spray conveyor belt and into a collection box through a collection pipe, preventing it from being carried onto the ground and saving manpower. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first side view of the present invention;

[0022] Figure 2 This utility model Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0023] Figure 3 This is a first cross-sectional view of the present invention.

[0024] Figure 4 This utility model Figure 3 A magnified schematic diagram of the local structure at point B;

[0025] Figure 5 This is a second cross-sectional view of the present invention.

[0026] Figure 6 This utility model Figure 5 A magnified schematic diagram of the structure at point C.

[0027] In the diagram: 1. Base box; 2. Upper frame; 3. Liquid storage tank; 4. Dispenser; 5. Nozzle; 6. Mounting plate; 7. First drive roller; 8. Second drive roller; 9. Third drive roller; 10. Spray conveyor belt; 11. Isolation conveyor belt; 12. Mounting frame; 13. Motor; 14. First drive sprocket; 15. Second drive sprocket; 16. First driven sprocket; 17. Second driven sprocket; 18. First chain; 19. Second chain; 20. Support leg; 21. Base plate; 22. Collection box; 23. Collection pipe; 24. Transparent observation window; 25. Auxiliary rod; 26. Arc-edge relay; 27. Protective shell; 28. Angled guide. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figures 1-6A circuit board solder resist developing device includes a base box 1 and an upper frame 2. The upper frame 2 is fixedly connected to the top of the base box 1. A liquid storage tank 3 is installed at the top of the upper frame 2. The bottom end of the liquid storage tank 3 passes through the upper frame 2 and is connected to a distributor 4. The bottom end of the distributor 4 is provided with multiple evenly distributed nozzles 5. Two corresponding mounting plates 6 are fixedly connected to the inner side wall of the upper frame 2. Two first drive rollers 7, two second drive rollers 8, and two third drive rollers 9 are rotatably connected between the two mounting plates 6. The two second drive rollers 8 and two third drive rollers 9 are located on both sides of the two first drive rollers 7. A spray conveyor is connected between the two first drive rollers 7. Belt 1210, with isolation conveyor belt 11 12 connecting the two second drive rollers 8 and the two third drive rollers 9. One end of the first drive roller 7, the second drive roller 8, and the third drive roller 9 passes through the upper frame 2. A mounting frame 13 is fixedly connected to the outer wall of the upper frame 2. A motor 14 connected to the first drive roller 7 is mounted on the mounting frame 13. The first drive roller 7 is provided with a first drive sprocket 15 and a second drive sprocket 16. The second drive roller 8 and the third drive roller 9 are respectively provided with a first driven sprocket 17 and a second driven sprocket 18. A first chain 19 is provided between the first drive sprocket 15 and the first driven sprocket 17. A second chain 20 is provided between sprocket 16 and the second driven sprocket 18. Support legs 21 are fixedly connected to the four corners of the bottom of the base box 1. The bottom ends of the four support legs 21 are fixedly connected to the bottom plate 22. A collection box 23 is provided on the bottom plate 22. A collection pipe 24 is provided at the top of the collection box 23, which connects to the inside of the bottom box 1. The starter motor 14 drives the first drive roller 7 to rotate. The first drive roller 7 drives the first drive sprocket 15 and the second drive sprocket 16 to rotate. This drives the first driven sprocket 17 and the second driven sprocket 18 to rotate. The first driven sprocket 17 and the second driven sprocket 18 drive the second drive roller 8 and the third drive roller 9 to rotate. This allows the first drive roller 7, the second drive roller 8, and the third drive roller 9 to rotate synchronously. At this time, the circuit board is placed on the isolation conveyor belt 12, which then transports the circuit board to the spray conveyor belt 1210. The developing solution sprayed from the nozzle 5 sprays the circuit board, and the spray conveyor belt 1210 then transports the circuit board to another isolation conveyor belt 12, whereby the circuit board is discharged. The sprayed developing solution flows down the edge of the spray conveyor belt 1210 and into the collection box 23 through the collection pipe 24, thus preventing the developing solution belt 12 from falling to the ground and saving manpower.

[0031] Reference Figure 1 The storage tank 3 is equipped with a transparent observation window 25, which is used to facilitate personnel to observe the liquid level in the storage tank 3, so as to add developer in time when the liquid level is insufficient and avoid interruption of flow.

[0032] Reference Figures 1-4Two auxiliary rods 26 are fixedly connected between the two mounting plates 6. The two auxiliary rods 26 are located between the two isolation conveyor belts 11 12 and the spray conveyor belt 12 10, respectively. Multiple evenly distributed arc-edge relays 27 are fixedly connected to the top of each of the two auxiliary rods 26. The top of the multiple arc-edge relays 27 is at the same horizontal height as the top of the spray conveyor belt 12 10. The auxiliary rods 26 and the arc-edge relays 27 cooperate to provide a transition between the isolation conveyor belt 11 12 and the spray conveyor belt 12 10, so as to prevent the edge of the circuit board from getting stuck in the gap between the isolation conveyor belt 11 12 and the spray conveyor belt 12 10, thereby improving the stability of the equipment.

[0033] Reference Figure 5 and Figure 6 A protective shell 28 is bolted to the outer wall of the upper frame 2. The motor 14, the first chain 19, and the second chain 20 are all located inside the protective shell 28. The protective shell 28 is used to protect the motor 14, the first chain 19, and the second chain 20, thereby reducing the probability of the equipment being damaged by bumps and collisions, and thus improving the stability of the equipment.

[0034] Reference Figure 3 The lower inner side wall of the bottom box 1 is provided with an inclined guide 29 that cooperates with the collection pipe 24. The inclined guide 29 is used to guide the developer flowing down from the spray conveyor belt 1210 to the position of the collection pipe 24, so as to facilitate the developer flowing into the collection box 23 and reduce the developer residue inside the equipment.

[0035] In summary, the working principle and process of this circuit board solder resist developing device are as follows: First, the motor 14 is started, driving the first drive roller 7 to rotate. The first drive roller 7 drives the first driving sprocket 15 and the second driving sprocket 16 to rotate, which in turn drives the first driven sprocket 17 and the second driven sprocket 18 to rotate. The first driven sprocket 17 and the second driven sprocket 18 then drive the second drive roller 8 and the third drive roller 9 to rotate, thus ensuring synchronous rotation of the first drive roller 7, the second drive roller 8, and the third drive roller 9. At this time, the circuit board is placed on the isolation conveyor belt 11 12, which then transports the circuit board to the spray conveyor belt 1210. The developing solution sprayed from the nozzle 5 then sprays the circuit board. The spray conveyor belt 1210 then transports the circuit board to another isolation conveyor belt 11 12, whereupon the circuit board is discharged. The sprayed developing solution flows down the edge of the spray conveyor belt 1210 and is collected... The developer solution flows into the collection tank 23 through pipe 24, thus preventing the developer solution belt 12 from falling onto the ground and saving manpower. The transparent observation window 25 is used to facilitate personnel to observe the liquid level in the storage tank 3, so that developer solution can be added in time when the storage is insufficient to avoid interruption of flow. The auxiliary rod 26 cooperates with the arc-edge relay 27 to provide a transition between the isolation conveyor belt 11 12 and the spray conveyor belt 1210, so as to prevent the edge of the circuit board from getting stuck in the gap between the isolation conveyor belt 11 12 and the spray conveyor belt 1210, thereby improving the stability of the equipment. The protective shell 28 is used to protect the motor 14, the first chain 19 and the second chain 20, thereby reducing the probability of the equipment being damaged by impact, thereby improving the stability of the equipment. The inclined guide 29 is used to facilitate the guidance of the developer solution flowing down from the spray conveyor belt 1210 to the position of the collection pipe 24, so as to facilitate the flow of developer solution into the collection tank 23 and reduce the amount of developer solution residue inside the equipment.

[0036] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A device for developing a solder resist on a circuit board, comprising a base box (1), characterized in that: The system includes an upper frame (2), which is fixedly connected to the top of the base box (1). A liquid storage tank (3) is installed on the top of the upper frame (2). A liquid distributor (4) is connected to the bottom of the liquid storage tank (3) through the upper frame (2). The bottom of the liquid distributor (4) is provided with multiple evenly distributed nozzles (5). Two corresponding mounting plates (6) are fixedly connected to the inner wall of the upper frame (2). Two first drive rollers (7), two second drive rollers (8), and two third drive rollers (9) are rotatably connected between the two mounting plates (6). The two second drive rollers (8) and the two third drive rollers (9) are located on both sides of the two first drive rollers (7). A spray conveyor belt (10) is driven between the two first drive rollers (7). An isolation conveyor belt (11) is driven between the two second drive rollers (8) and the two third drive rollers (9). The first drive rollers (7), the second drive rollers (8), and the third drive rollers (9) are connected to each other. One end of each component passes through the upper frame (2). A mounting frame (12) is fixedly connected to the outer wall of the upper frame (2). A motor (13) connected to the first transmission roller (7) is mounted on the mounting frame (12). The first transmission roller (7) is provided with a first driving sprocket (14) and a second driving sprocket (15). The second transmission roller (8) and the third transmission roller (9) are respectively provided with a first driven sprocket (16) and a second driven sprocket (17). The first driving sprocket (14) A first chain (18) is provided between the first driven sprocket (16) and the second driving sprocket (15) and the second driven sprocket (17). A second chain (19) is provided between the second driving sprocket (15) and the second driven sprocket (17). Support legs (20) are fixedly connected to the four corners of the bottom of the bottom box (1). A bottom plate (21) is fixedly connected to the bottom of the four support legs (20). A collection box (22) is provided on the bottom plate (21). A collection pipe (23) is provided at the top of the collection box (22) and connects to the inside of the bottom box (1).

2. The circuit board solder mask developing apparatus according to claim 1, characterized by: The liquid storage tank (3) is equipped with a transparent observation window (24).

3. The circuit board solder mask developing apparatus of claim 1, wherein: Two auxiliary rods (25) are fixedly connected between the two mounting plates (6). The two auxiliary rods (25) are located between the two isolation conveyor belts (11) and the spray conveyor belt (10). Multiple evenly distributed arc-edge relays (26) are fixedly connected to the top of each of the two auxiliary rods (25). The top of the multiple arc-edge relays (26) is at the same horizontal height as the top of the spray conveyor belt (10).

4. The circuit board solder mask developing apparatus of claim 1, wherein: The outer wall of the upper frame (2) is bolted to a protective shell (27), and the motor (13), the first chain (18) and the second chain (19) are all located inside the protective shell (27).

5. The circuit board solder mask developing apparatus of claim 1, wherein: The lower inner side wall of the bottom box (1) is provided with an inclined guide (28) that cooperates with the collection pipe (23).

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