Circuit board etching tin removal equipment

Abstract

This invention provides a circuit board etching and desoldering equipment, including a roller conveyor, an etching machine, and a desoldering box. The etching machine and the desoldering box are respectively installed on both sides of the top of the roller conveyor. Several drip cylinders are installed inside the desoldering box. A rotatable plate is rotatably connected inside the drip cylinders. A soft brush is connected to the bottom end of the rotatable plate. The bottom end of the soft brush penetrates through the drip cylinder and extends to the outside. A storage box is connected to one side of the outer wall of the roller conveyor. A partition is installed inside the storage box. The two sides of the partition are respectively a desoldering liquid tank and a film-removing agent tank. A pair of fixed bends are connected between the storage box and the desoldering box. The fixed bends include a first tube body and a second tube body. One end of the first tube body penetrates through the desoldering box and is connected to several guide hoses. By efficiently removing the black film and the adhering water stains, the problems of poor contact and defective products on the circuit board are solved.

Description

Technical Field

[0001] This invention relates to the field of circuit board processing technology, and more specifically to circuit board etching and desoldering equipment. Background Technology

[0002] Etching is a technique that removes materials using chemical reactions or physical impacts, while desoldering is a measure to remove excess tin from the surface of a workpiece. Circuit boards also require corresponding equipment during the manufacturing process for etching and desoldering.

[0003] Currently, during the etching and tin stripping process for circuit boards, a layer of grayish-black film adheres to the copper substrate after the tin plating is removed. This film is typically removed by immersion, but some thicker films are difficult to clean, resulting in the circuit board carrying the film and potentially causing poor contact later on. Secondly, water stains or chemical residues may remain on the circuit board after etching and tin stripping. Prolonged adhesion can corrode the circuit board, leading to defective products. Summary of the Invention

[0004] This invention provides a circuit board etching and desoldering equipment, which solves the problems of poor contact and defective products on circuit boards by efficiently removing the black film and the attached water stains.

[0005] In view of the above problems, the technical solution proposed by the present invention is as follows:

[0006] A circuit board etching and desoldering equipment includes a roller conveyor, an etching machine, and a desoldering box. The etching machine and the desoldering box are respectively installed on both sides of the top of the roller conveyor. Several drip cylinders are installed inside the desoldering box, and a rotatable plate is rotatably connected inside each drip cylinder. A soft brush is connected to the bottom end of each rotatable plate, and the bottom end of the soft brush penetrates through the drip cylinder and extends to the outside. A storage box is connected to one side of the outer wall of the roller conveyor. A partition is installed inside the storage box, with a desoldering liquid tank and a film-removing agent tank on either side of the partition. A pair of fixed bends are connected between the storage box and the desoldering box. Each fixed bend includes a first tube body. The first tube has one end that passes through the desoldering box and is connected to several guide hoses. One end of each guide hose is connected to one side of a dripping cylinder. The top of the desoldering box has an inclined surface. A central tube is embedded inside the inclined surface. One end of the central tube is connected to one end of the second tube. A nozzle is connected to the outer wall of the central tube. One end of the nozzle extends into the interior of the desoldering box. A guide roller is rotatably connected to the inner wall of the roller conveyor. The guide roller includes a roller body, a slot, and an electric clamp. Several slots are equidistantly arranged on the outer wall of the roller body. An electric clamp is installed inside the slots.

[0007] As a preferred embodiment of the present invention, a shaft is connected to the center of the top of the sluice plate, and the top ends of several shafts pass through the dripping cylinder respectively, and are fitted with a driving gear and a driven gear, and the driving gear and the driven gear mesh with each other.

[0008] As a preferred embodiment of the present invention, a plurality of retaining blocks are installed at the top of the inside of the desoldering box, and one side of the plurality of retaining blocks is rotatably connected to one end of the shaft.

[0009] As a preferred embodiment of the present invention, a stepper motor is installed on one side of the top of the desoldering box, and the output end of the stepper motor passes through the desoldering box and is connected to one end of the shaft for transmission.

[0010] As a preferred embodiment of the present invention, the idler conveyor has a fixed plate installed on one side near the top of the guide roller, and a fan is installed on one side of the fixed plate.

[0011] As a preferred embodiment of the present invention, a glass cover plate is hinged to one side of the outer wall of the etching machine, and the outer wall of the glass cover plate is respectively attached to one side of the roller conveyor and the desoldering box. A handle is installed on the top edge of the glass cover plate.

[0012] As a preferred embodiment of the present invention, water pumps are respectively installed at the bottom of the tin stripping solution tank and the film removal agent tank, and connecting pipes are fitted at the output ends of the two water pumps. One end of the two connecting pipes is connected to one end of the first pipe body and the second pipe body, respectively.

[0013] As a preferred embodiment of the present invention, a variable frequency motor is installed on the outer wall of the idler conveyor, and the output end of the variable frequency motor passes through the idler conveyor and is connected to one end of the guide roller for transmission.

[0014] As a preferred embodiment of the present invention, the idler conveyor is rotatably connected to a pressure roller on the side near the etching machine.

[0015] As a preferred embodiment of the present invention, one end of the idler conveyor is connected to a receiving trough, and anti-collision strips are affixed inside the receiving trough.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By adding solder stripping solution and film remover separately inside the storage tank, sufficient chemical agents are provided to the solder stripping box, allowing the circuit board products processed by the etching machine to be quickly put into the solder stripping process. The connection between the centralized pipe and the nozzle allows the black film to be removed from one side of the solder stripping box. The nozzle spraying function replaces the traditional soaking method, facilitating the cleaning of thicker black films, improving the equipment's efficiency and making the black film removal process more thorough. The installation of guide rollers makes it easier to remove water stains. The processed circuit board products are transported to the roller body via a roller conveyor, extending into the slot. Combined with the clamping effect of the electric clamps, multiple circuit board products are kept equidistant on the roller body. A variable frequency motor drives the guide rollers directionally, ensuring that the water stains adhering to the circuit board products drip off evenly. The blower's airflow further accelerates the drying of the circuit board products, thus increasing the equipment's operating speed.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the circuit board etching and desoldering equipment disclosed in an embodiment of the present invention;

[0020] Figure 2 This is a side sectional view of the desoldering box structure of the circuit board etching desoldering equipment disclosed in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the drip cylinder structure of the circuit board etching and desoldering equipment disclosed in an embodiment of the present invention;

[0022] Figure 4 This is a side view of the guide roller structure of the circuit board etching and desoldering equipment disclosed in an embodiment of the present invention;

[0023] Figure 5 This is a cross-sectional view of the storage box structure of the circuit board etching and desoldering equipment disclosed in an embodiment of the present invention;

[0024] Figure 6 This is a front sectional view of the desoldering box structure of the circuit board etching desoldering equipment disclosed in an embodiment of the present invention.

[0025] Reference numerals: 1. Idler conveyor; 2. Etching machine; 3. Solder stripping box; 4. Storage box; 5. Directional roller; 501. Roller body; 502. Slot; 503. Electric clamp; 6. Fan; 7. Stepper motor; 8. Variable frequency motor; 9. Fixed bend; 901. First tube body; 902. Second tube body; 10. Driven gear; 11. Driven gear; 12. Dispensing cylinder; 13. Holding block; 14. Shaft; 15. Strainer plate; 16. Soft brush; 17. Guide hose; 18. Water pump; 19. Connecting pipe; 20. Partition plate; 21. Centralizing pipe; 22. Nozzle; 23. Receiving trough; 24. Glass cover plate. Specific Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] See attached document Figure 1 As shown in Figure 6, the circuit board etching and desoldering equipment includes a roller conveyor 1, an etching machine 2, and a desoldering box 3. The etching machine 2 and the desoldering box 3 are respectively installed on the top two sides of the roller conveyor 1. Several drip cylinders 12 are installed inside the desoldering box 3. A rotatable stencil 15 is rotatably connected inside the drip cylinders 12. A soft brush 16 is connected to the bottom end of the stencil 15. The bottom end of the soft brush 16 penetrates through the drip cylinder 12 and extends to the outside. A storage box 4 is connected to one side of the outer wall of the roller conveyor 1. A partition 20 is installed inside the storage box 4. The two sides of the partition 20 are the desoldering liquid tank and the film removal agent tank, respectively. A pair of fixed bends 9 are connected between the storage box 4 and the desoldering box 3. The fixed bends 9 include a first tube body 901 and a second tube body. 902, one end of the first tube 901 passes through the desoldering box 3 and is connected to several guide hoses 17. One end of each guide hose 17 is connected to one side of the dripping cylinder 12. The top of the desoldering box 3 is provided with an inclined surface. A central tube 21 is embedded in the inclined surface. One end of the central tube 21 is connected to one end of the second tube 902. A nozzle 22 is connected to the outer wall of the central tube 21. One end of the nozzle 22 extends into the interior of the desoldering box 3. A guide roller 5 is rotatably connected to the inner wall of the roller conveyor 1. The guide roller 5 includes a roller body 501, a slot 502 and an electric clamp 503. Several slots 502 are equidistantly arranged on the outer wall of the roller body 501. The electric clamp 503 is installed inside the slots 502.

[0028] In one embodiment of the present invention, a shaft 14 is connected to the center of the top of the sprue plate 15. The top ends of several shafts 14 pass through the dripping cylinder 12 respectively, and are fitted with a drive gear 11 and a driven gear 10, which mesh with each other.

[0029] See attached document Figure 1As shown, in this embodiment of the invention, by placing the circuit board product into the feed port of the roller conveyor 1, the roller conveyor 1 moves the circuit board into the etching machine 2, thereby performing the etching operation. The circuit board can be observed through the glass cover plate 24, which facilitates real-time detection of the etching status of the circuit board. By pulling the glass cover plate 24, inferior circuit boards can be replaced. The installation and use of the desoldering box 3 facilitates the desoldering process of the equipment. After processing, the variable frequency motor 8 is started, and its output end drives the steering roller 5 to rotate, thereby clamping and rotating the circuit board. With the blowing action of the fan 6, it is easy to clean the water stains and chemicals attached to the circuit board.

[0030] In one embodiment of the present invention, a plurality of retaining blocks 13 are installed at the top of the interior of the desoldering box 3, and one side of the plurality of retaining blocks 13 is rotatably connected to one end of the shaft 14.

[0031] In one embodiment of the present invention, a stepper motor 7 is installed on one side of the top of the desoldering box 3. The output end of the stepper motor 7 passes through the desoldering box 3 and is connected to one end of the shaft 14 for transmission.

[0032] See attached document Figure 2 As shown, in this embodiment of the invention, the output end of the stepper motor 7 drives the shaft 14 to rotate stably, and the meshing relationship between the driving gear 11 and the driven gear 10 enables multiple shafts 14 to rotate synchronously, thereby driving the stencil 15 and the soft brush 16 to rotate respectively. Then, by continuously supplying the desoldering solution to the dripping cylinder, the soft brush 1 carries the desoldering solution and performs the brushing work.

[0033] In one embodiment of the present invention, the idler conveyor 1 is further provided with a fixing plate on the side near the top of the guide roller 5, and a fan 6 is provided on one side of the fixing plate.

[0034] See attached document Figure 4 As shown, in this embodiment of the invention, by setting the card slots 502 to be equally spaced, it is ensured that each line is equally spaced and that alternating contact is effectively avoided. Combined with the clamping effect of the electric clamp 503, the circuit board product remains stable on the steering roller 5.

[0035] In one embodiment of the present invention, a glass cover plate 24 is hinged to one side of the outer wall of the etching machine 2. The outer wall of the glass cover plate 24 is respectively attached to one side of the roller conveyor 1 and the desoldering box 3. A handle is installed on the top side of the glass cover plate 24.

[0036] In one embodiment of the present invention, water pumps 18 are installed at the bottom of the tin stripping solution tank and the film removal agent tank, respectively. The output ends of the two water pumps 18 are fitted with connecting pipes 19, and one end of the two connecting pipes 19 is connected to one end of the first pipe body 901 and the second pipe body 902, respectively.

[0037] In one embodiment of the present invention, a variable frequency motor 8 is installed on the outer wall of the roller conveyor 1. The output end of the variable frequency motor 8 passes through the roller conveyor 1 and is connected to one end of the steering roller 5 for transmission.

[0038] In one embodiment of the present invention, the idler conveyor 1 is further rotatably connected to a pressure roller on the side near the etching machine 2.

[0039] In one embodiment of the present invention, the idler conveyor 1 is further connected to a receiving trough 23 at one end, and anti-collision strips are pasted inside the receiving trough 23.

[0040] See attached document Figure 6 As shown, in this embodiment of the invention, by installing a plurality of nozzles 22 on an inclined surface, the film remover is kept inclined during sputtering, thereby facilitating the removal of black film from circuit board products.

[0041] Specifically, firstly, the equipment is moved to the designated workshop and started for operational testing. After ensuring normal operation, the circuit board products are fed into the inlet of the roller conveyor 1. The etching machine 2 is then started, causing the roller conveyor 1 to move the circuit board into the etching machine 2 for etching. After etching, the circuit board can be observed through the glass cover 24, and the etched circuit board can be inspected in real time. Simultaneously, the glass cover 24 can be pulled to replace inferior circuit boards. The desoldering box 3 is then installed to facilitate desoldering. Two water pumps 18 are started to supply desoldering solution to the drip cylinder 12 and the central pipe 21, respectively. With the film remover, the output of the stepper motor 7 drives the shaft 14 to rotate stably. The meshing relationship between the drive gear 11 and the driven gear 10 causes multiple shafts 14 to rotate synchronously, thereby driving the stencil 15 and the soft brush 16 to rotate respectively. The tin stripping solution is continuously supplied to the dripping cylinder, and the soft brush 1 carries the tin stripping solution to perform the brushing work. After the treatment, the variable frequency motor 8 is started, and its output drives the steering roller 5 to rotate, thereby clamping and rotating the circuit board. With the blowing action of the fan 6, it is easy to clean the water stains and agents attached to the circuit board. Then, the transportation function of the idler conveyor 1 is used to transport the corresponding circuit board to the collection tank 23.

[0042] It should be noted that the specific models and specifications of the electric clamp 503, fan 6, stepper motor 7, frequency converter motor 8 and water pump 18 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0043] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A circuit board etching and desoldering equipment, characterized in that, The system includes a roller conveyor (1), an etching machine (2), and a desoldering box (3). The etching machine (2) and the desoldering box (3) are respectively installed on the top two sides of the roller conveyor (1). The desoldering box (3) is equipped with several drip cylinders (12). The drip cylinders (12) are rotatably connected to a stencil (15). The bottom end of the stencil (15) is connected to a soft brush (16). The bottom end of the soft brush (16) penetrates the drip cylinder (12) and extends to the outside. A storage box (4) is connected to one side of the outer wall of the roller conveyor (1). A partition (20) is installed inside the storage box (4). The two sides of the partition (20) are a desoldering liquid tank and a film removal agent tank, respectively. A pair of fixed bends (9) are connected between the storage box (4) and the desoldering box (3). The fixed bends (9) include a first tube body (901) and a second tube body (902). One end of a tube (901) passes through the desoldering box (3) and is connected to several guide hoses (17). One end of each guide hose (17) is connected to one side of a dripping cylinder (12). The top of the desoldering box (3) is provided with an inclined surface. A central tube (21) is embedded in the interior of the inclined surface. One end of the central tube (21) is connected to one end of the second tube (902). A nozzle (22) is connected to the outer wall of the central tube (21). One end of the nozzle (22) extends into the interior of the desoldering box (3). A guide roller (5) is rotatably connected to the inner wall of the roller conveyor (1). The guide roller (5) includes a roller body (501), a slot (502), and an electric clamp (503). Several slots (502) are equidistantly arranged on the outer wall of the roller body (501). An electric clamp (503) is installed inside the slots (502).

2. The circuit board etching and desoldering equipment according to claim 1, characterized in that: The top center of the sluice plate (15) is connected to a shaft (14), and the top ends of several shafts (14) pass through the dripping cylinder (12) respectively, and are fitted with a drive gear (11) and a driven gear (10), and the drive gear (11) and the driven gear (10) mesh with each other.

3. The circuit board etching and desoldering equipment according to claim 2, characterized in that: The top of the desoldering box (3) is equipped with several retaining blocks (13), and one side of the retaining blocks (13) is rotatably connected to one end of the shaft (14).

4. The circuit board etching and desoldering equipment according to claim 3, characterized in that: A stepper motor (7) is installed on one side of the top of the desoldering box (3). The output end of the stepper motor (7) passes through the desoldering box (3) and is connected to one end of the shaft (14) for transmission.

5. The circuit board etching and desoldering equipment according to claim 1, characterized in that: The idler conveyor (1) has a fixed plate installed on one side near the top of the guide roller (5), and a fan (6) is installed on one side of the fixed plate.

6. The circuit board etching and desoldering equipment according to claim 1, characterized in that: A glass cover plate (24) is hinged to one side of the outer wall of the etching machine (2). The outer wall of the glass cover plate (24) is respectively attached to one side of the roller conveyor (1) and the desoldering box (3). A handle is installed on the top side of the glass cover plate (24).

7. The circuit board etching and desoldering equipment according to claim 1, characterized in that: Water pumps (18) are installed at the bottom of the inner walls of the desoldering solution tank and the film remover tank, respectively. The output ends of the two water pumps (18) are fitted with connecting pipes (19), and one end of the two connecting pipes (19) is connected to one end of the first pipe body (901) and the second pipe body (902), respectively.

8. The circuit board etching and desoldering equipment according to claim 1, characterized in that: The outer wall of the roller conveyor (1) is equipped with a variable frequency motor (8), the output end of which passes through the roller conveyor (1) and is connected to one end of the steering roller (5) for transmission.

9. The circuit board etching and desoldering equipment according to claim 1, characterized in that: The roller conveyor (1) has a pressure roller rotatably connected to the side near the etching machine (2).

10. The circuit board etching and desoldering equipment according to claim 1, characterized in that: One end of the roller conveyor (1) is connected to a receiving trough (23), and anti-collision strips are pasted inside the receiving trough (23).

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