A spraying method and spraying device for circuit board triple-proof paint

Abstract

The present invention belongs to the technical field of circuit board spraying, and in particular to a spraying device for circuit board conformal coating, comprising a workbench and two symmetrically arranged bases, the workbench being fixedly mounted on the top ends of the two bases, the outer walls on both sides of the top of the workbench being fixedly connected to symmetrically arranged support rods, the outer walls of the four support rods being slidably connected to guide blocks, the outer walls on one side of the four guide blocks being fixedly connected to the same mounting plate, the outer wall on one side of the bottom of the mounting plate being fixedly connected to a first fixing bracket, the bottom end of the first fixing bracket being fixedly connected to a first positioning block, and two second fixing brackets being fixedly mounted on the side of the bottom of the mounting plate away from the first fixing bracket; the present invention can position circuit boards of two different lengths, facilitates the spraying of conformal coating on circuit boards of two different lengths, has good applicability, and can reuse spilled conformal coating, thereby reducing the waste of resources.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board spraying paint, and in particular to a spraying method and a spraying device for a three-proof paint for a circuit board. Background Art

[0002] Conformal coating is a specially formulated coating used to protect circuit boards and related equipment from environmental corrosion. It has excellent high and low temperature resistance. After curing, it forms a transparent protective film with excellent insulation, moisture resistance, leakage protection, shock resistance, dust resistance, corrosion resistance, aging resistance, and corona resistance.

[0003] During the circuit board processing process, it is often necessary to first position the circuit board and then use a spray device to spray the conformal coating onto the circuit board surface to protect the circuit board from environmental corrosion during operation. However, when using a spray device to spray the conformal coating on the circuit board, it is only possible to position the circuit board of a single length specification and then spray the conformal coating onto the circuit board surface. When the circuit boards are of different lengths, a separate device is required for spraying, which is relatively inconvenient. Summary of the Invention

[0004] Based on the technical problem that the current spraying device can only position circuit boards of a single length specification, the present invention proposes a spraying method and a spraying device for circuit board conformal coating.

[0005] A spraying device for a conformal coating of a circuit board proposed by the present invention comprises a workbench and two symmetrically arranged bases, the workbench being fixedly mounted on the tops of the two bases, the outer walls on both sides of the top of the workbench being fixedly connected to symmetrically arranged support rods, the outer walls of the four support rods being slidably connected to guide blocks, the outer walls on one side of the four guide blocks being fixedly connected to the same mounting plate, the outer wall on one side of the bottom of the mounting plate being fixedly connected to a first fixing bracket, the bottom end of the first fixing bracket being fixedly connected to a first positioning block, two second fixing brackets being fixedly mounted on a side of the bottom of the mounting plate away from the first fixing bracket, the bottom ends of the two second fixing brackets being fixedly connected to a second positioning block;

[0006] A placement cavity is provided in the middle of the workbench, and a first slide rail is provided on the inner wall on the opposite side of the placement cavity, and the inner walls of the two first slide rails are slidably connected to the first slider, and the two first sliders are fixedly connected to the same guide plate on the opposite side, a threaded hole is provided in the middle of one side of the workbench, and a screw rod is screwed on the inner wall of the threaded hole, one end of the screw rod is rotatably connected to the outer wall of one side of the guide plate, the outer wall of one side of the base on the right side is fixedly connected to the support seat, the outer wall of the top of the support seat is fixedly connected to the drive motor, and the output shaft of the drive motor is connected to one end of the screw rod;

[0007] The outer wall of one side of the guide plate is fixedly connected with a movable plate, and the inner wall of the placement cavity away from the movable plate is fixedly connected with a placement plate, and the placement plate is located directly below the first positioning block.

[0008] As a preferred embodiment of the present invention, a first sponge pad is fixedly connected to the bottom outer wall of the first positioning block, and a second sponge pad is fixedly connected to the bottom outer walls of the two second positioning blocks.

[0009] As a preferred embodiment of the present invention, a first rubber pad is fixedly connected to the outer wall of the top of the movable plate, and a second rubber pad is fixedly connected to the outer wall of the top of the placement plate.

[0010] As a preferred embodiment of the present invention, the same support plate is fixedly installed on the opposite side of the two bases, the top outer wall of the support plate is provided with a symmetrically arranged second slide rail, the inner walls of the two second slide rails are slidably connected with a second slider, and the top ends of the two second sliders are fixedly connected with the same aggregate box, the aggregate box is located directly below the placement cavity, and a wedge-shaped guide seat is provided on the inner side of the aggregate box.

[0011] As a preferred embodiment of the present invention, the top ends of the four support rods are fixedly connected to the same top plate, the top outer wall of the top plate is fixedly connected to a hydraulic cylinder, and the piston rod of the hydraulic cylinder passes through the top plate and is connected to the outer wall in the middle of the top of the mounting plate.

[0012] As a preferred embodiment of the present invention, a paint box is fixedly installed on the outer wall of the middle bottom of the mounting plate, and the outer wall of the bottom of the paint box is fixedly connected to a symmetrically arranged collecting pipe. The bottom of the two collecting pipes are fixedly installed with equidistantly distributed spray heads, and the spray heads are located above the placement cavity.

[0013] As a preferred embodiment of the present invention, a feed pump is fixedly connected to the outer wall of one side of the paint box, the feed port of the feed pump is connected to the paint box through a pipeline, the discharge port of the feed pump is connected to a feed pipe, the feed pipe is a two-way pipe, and the two bottom ends of the feed pipe are respectively connected to two collecting pipes.

[0014] A spraying method for a spraying device for a circuit board conformal coating, comprising the following steps:

[0015] Step 1: First, start the drive motor to drive the screw to rotate. The screw cooperates with the first slide rail and the first slider to drive the guide plate to move horizontally. The guide plate drives the movable plate to move horizontally until the movable plate is directly below one of the second positioning blocks.

[0016] Step 2: Place the circuit board to be painted on the placement plate and the movable plate, with both sides of the bottom of the circuit board in contact with the first rubber pad and the second rubber pad respectively, completing the placement of the circuit board;

[0017] Step 3: Then start the hydraulic cylinder to work, cooperate with the support rod and the guide block to drive the mounting plate to move downward, the mounting plate drives the first fixing bracket and the two second fixing brackets to move downward, the first fixing bracket and the two second fixing brackets respectively drive the first positioning block and the two second positioning blocks to move downward, until the first sponge pad and the second sponge pad at the bottom of the first positioning block and one of the second positioning blocks are in contact with the top two sides of the circuit board, thereby pressing and stabilizing the circuit board, achieving the positioning effect of the circuit board, and being able to position circuit boards of two different lengths, thereby facilitating the spraying of three-proof paint on circuit boards of two different lengths, with good applicability;

[0018] Step 4: After the circuit board to be painted is positioned, the pump is started to transport the conformal coating in the paint box through the feed pipe to the two collecting pipes, and then sprayed onto the surface of the circuit board through the nozzle, thus completing the conformal coating work on the circuit board;

[0019] Step 5: When spraying the circuit board, the spilled conformal paint will fall into the collection box and flow to the bottom of the collection box through the action of the guide seat. When the spraying work is completed, the collection box can be pulled on the support plate through the action of the second slide rail and the second slider. The collection box can be pulled to one side of the workbench, and then the collected conformal paint can be reused, reducing the waste of resources.

[0020] The beneficial effects of the present invention are:

[0021] 1. In the present invention, by providing a driving motor, a screw rod, a first slide rail, a first slider, a guide plate, a movable plate, a placement plate, a first rubber pad and a second rubber pad, and cooperating with the provided first fixing frame, a first positioning block, a first sponge pad, a second fixing frame, a second fixing block and a second sponge pad, when it is necessary to spray the circuit board with the three-proof paint, the driving motor is started to drive the screw rod to rotate, and the screw rod cooperates with the action of the first slide rail and the first slider to drive the guide plate to move laterally, and the guide plate drives the movable plate to move laterally until the movable plate is located directly under one of the second positioning blocks, and then the circuit board to be painted is placed on the placement plate and the movable plate, and the bottom two sides of the circuit board are respectively in contact with the first rubber pad and the second rubber pad. The first and second fixing frames are moved downwards by the hydraulic cylinder, and the first and second fixing frames are moved downwards by the hydraulic cylinder, and the first and second fixing frames are moved downwards by the hydraulic cylinder, respectively, until the first and second sponge pads at the bottom of the first positioning block and one of the second positioning blocks are in contact with the top sides of the circuit board, thereby pressing and stabilizing the circuit board and achieving the positioning effect of the circuit board. The hydraulic cylinder can also be used to position circuit boards of two different lengths, thereby facilitating the spraying of conformal coating on circuit boards of two different lengths, and has good applicability.

[0022] 2. In the present invention, when the circuit board is being sprayed, the spilled conformal paint will fall into the collection box and flow to the bottom of the collection box through the action of the guide seat. When the spraying work is completed, the collection box can be pulled to move on the support plate through the action of the second slide rail and the second slider, and the collection box can be pulled to one side of the workbench. Then, the collected conformal paint can be reused, reducing the waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a spraying device for conformal coating of circuit boards proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the workbench structure of a device for spraying conformal coating on circuit boards proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the main structure of the bottom of the mounting plate of a spraying device for triple conformal coating of circuit boards proposed by the present invention;

[0026] Figure 4 This is a schematic structural diagram of the bottom side view of the mounting plate of a spraying device for triple-conformal paint for circuit boards proposed by the present invention.

[0027] In the figure: 1. base; 2. workbench; 3. support rod; 4. guide block; 5. mounting plate; 6. top plate; 7. hydraulic cylinder; 8. support plate; 9. material collecting box; 10. first slide rail; 11. guide plate; 12. screw rod; 13. support seat; 14. drive motor; 15. moving plate; 16. first rubber pad; 17. placement plate; 18. second rubber pad; 19. second slide rail; 20. paint box; 21. material extraction pump; 22. material delivery pipe; 23. material collecting pipe; 24. spray head; 25. first fixed frame; 26. first positioning block; 27. first sponge pad; 28. second fixed frame; 29. ​​second positioning block; 30. second sponge pad; 31. guide seat. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-4

[0030] A device for spraying conformal coating on circuit boards, comprising a workbench 2 and two symmetrically arranged bases 1, the workbench 2 being fixedly mounted on the tops of the two bases 1, the outer walls on both sides of the top of the workbench 2 being fixedly connected to symmetrically arranged support rods 3, the outer walls of the four support rods 3 being slidably connected to guide blocks 4, the outer walls of one side of the four guide blocks 4 being fixedly connected to the same mounting plate 5, the outer wall of one side of the bottom of the mounting plate 5 being fixedly connected to a first fixing bracket 25, the bottom end of the first fixing bracket 25 being fixedly connected to a first positioning block 26, two second fixing brackets 28 being fixedly mounted on the side of the bottom of the mounting plate 5 away from the first fixing bracket 25, the bottom ends of the two second fixing brackets 28 being fixedly connected to a second positioning block 29;

[0031] A placement cavity is provided in the middle of the workbench 2, and a first slide rail 10 is provided on the inner wall on the opposite side of the placement cavity. The inner walls of the two first slide rails 10 are slidably connected to first sliders, and the two first sliders are fixedly connected to the same guide plate 11 on the opposite side. A threaded hole is provided in the middle of one side of the workbench 2, and a screw rod 12 is screwed on the inner wall of the threaded hole. One end of the screw rod 12 is rotatably connected to the outer wall of one side of the guide plate 11. A support seat 13 is fixedly connected to the outer wall of one side of the base 1 on the right side, and a drive motor 14 is fixedly connected to the outer wall of the top of the support seat 13. The output shaft of the drive motor 14 is connected to one end of the screw rod 12;

[0032] The outer wall of one side of the guide plate 11 is fixedly connected to the movable plate 15 , and the inner wall of the placement cavity away from the movable plate 15 is fixedly connected to the placement plate 17 . The placement plate 17 is located directly below the first positioning block 26 .

[0033] In a specific embodiment, the bottom outer wall of the first positioning block 26 is fixedly connected to the first sponge pad 27, the bottom outer walls of the two second positioning blocks 29 are fixedly connected to the second sponge pad 30, the top outer wall of the movable plate 15 is fixedly connected to the first rubber pad 16, the top outer wall of the placement plate 17 is fixedly connected to the second rubber pad 18, the two bases 1 are fixedly installed on the opposite side of the same support plate 8, the top outer wall of the support plate 8 is provided with a symmetrically arranged second slide rail 19, the inner walls of the two second slide rails 19 are both slidably connected to the second slider, and the top of the two second sliders are fixedly connected to the same aggregate box 9, the aggregate box 9 is located directly below the placement cavity, and a wedge-shaped guide seat 31 is provided on the inner side of the aggregate box 9.

[0034] Furthermore, the top ends of the four support rods 3 are fixedly connected to the same top plate 6, the top outer wall of the top plate 6 is fixedly connected to a hydraulic cylinder 7, the piston rod of the hydraulic cylinder 7 passes through the top plate 6 and is connected to the outer wall of the middle top of the mounting plate 5, and the outer wall of the middle bottom of the mounting plate 5 is fixedly installed with a paint box 20, and the outer wall of the bottom of the paint box 20 is fixedly connected to a symmetrically arranged collecting pipe 23, and the bottom of the two collecting pipes 23 are fixedly installed with equidistantly distributed spray heads 24, and the spray heads 24 are located above the placement cavity. A suction pump 21 is fixedly connected to the outer wall of one side of the paint box 20, and the feed port of the suction pump 21 is connected to the paint box 20 through a pipeline, and the discharge port of the suction pump 21 is connected to the delivery pipe 22, which is a two-way pipe, and the two bottom end pipe openings of the delivery pipe 22 are respectively connected to the two collecting pipes 23.

[0035] A spraying method for a spraying device for a circuit board conformal coating, comprising the following steps:

[0036] Step 1: First, start the drive motor 14 to drive the screw 12 to rotate. The screw 12 cooperates with the first slide rail 10 and the first slider to drive the guide plate 11 to move horizontally. The guide plate 11 drives the movable plate 15 to move horizontally until the movable plate 15 is directly below one of the second positioning blocks 29.

[0037] Step 2: Place the circuit board to be painted on the placement plate 17 and the movable plate 15, and ensure that both sides of the bottom of the circuit board are in contact with the first rubber pad 16 and the second rubber pad 18 respectively, thus completing the placement of the circuit board.

[0038] Step 3: Then start the hydraulic cylinder 7 to work, and cooperate with the support rod 3 and the guide block 4 to drive the mounting plate 5 to move downward, and the mounting plate 5 drives the first fixing frame 25 and the two second fixing frames 28 to move downward, and the first fixing frame 25 and the two second fixing frames 28 respectively drive the first positioning block 26 and the two second positioning blocks 29 to move downward, until the first sponge pad 27 and the second sponge pad 30 at the bottom of the first positioning block 26 and one of the second positioning blocks 29 are in contact with the top sides of the circuit board, thereby pressing and stabilizing the circuit board, achieving the positioning effect of the circuit board, and being able to position circuit boards of two different lengths, thereby facilitating the spraying of three-proof paint on circuit boards of two different lengths, with good applicability;

[0039] Step 4: After the circuit board to be painted is positioned, the pump 21 is started to transport the conformal coating in the paint tank 20 through the delivery pipe 22 to the two collecting pipes 23. The paint is then sprayed onto the surface of the circuit board through the nozzle 24, completing the conformal coating process.

[0040] Step 5: When spraying the circuit board, the spilled conformal paint will fall into the collection box 9 and flow to the bottom of the collection box 9 through the action of the guide seat 31. When the spraying work is completed, the collection box 9 can be pulled to move on the support plate 8 through the action of the second slide rail 19 and the second slider. The collection box 9 can be pulled to one side of the workbench 2, and then the collected conformal paint can be reused, reducing the waste of resources.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spraying device for a conformal coating on a circuit board, comprising a workbench (2) and two symmetrically arranged bases (1), characterized in that: The workbench (2) is fixedly mounted on the top of the two bases (1), the outer walls on both sides of the top of the workbench (2) are fixedly connected to symmetrically arranged support rods (3), the outer walls of the four support rods (3) are slidably connected to guide blocks (4), the outer walls on one side of the four guide blocks (4) are fixedly connected to the same mounting plate (5), the outer wall on one side of the bottom of the mounting plate (5) is fixedly connected to a first fixing frame (25), the bottom end of the first fixing frame (25) is fixedly connected to a first positioning block (26), and two second fixing frames (28) are fixedly mounted on the side of the bottom of the mounting plate (5) away from the first fixing frame (25), and the bottom ends of the two second fixing frames (28) are fixedly connected to a second positioning block (29); The top ends of the four support rods (3) are fixedly connected to the same top plate (6), the top outer wall of the top plate (6) is fixedly connected to a hydraulic cylinder (7), the piston rod of the hydraulic cylinder (7) passes through the top plate (6) and is connected to the top middle outer wall of the mounting plate (5); a paint box (20) is fixedly installed on the bottom middle outer wall of the mounting plate (5), the bottom outer wall of the paint box (20) is fixedly connected to a symmetrically arranged collecting pipe (23), and the bottoms of the two collecting pipes (23) are fixedly installed with equidistantly distributed spray heads (24), and the spray heads (24) are located above the placement cavity; A placement cavity is provided in the middle of the workbench (2), and a first slide rail (10) is provided on the inner wall of the opposite side of the placement cavity, and the inner walls of the two first slide rails (10) are slidably connected to the first slider, and the two first sliders are fixedly connected to the same guide plate (11) on the opposite side, a threaded hole is provided in the middle of one side of the workbench (2), and a screw rod (12) is screwed on the inner wall of the threaded hole, and one end of the screw rod (12) is rotatably connected to the outer wall of one side of the guide plate (11), and the outer wall of one side of the base (1) on the right side is fixedly connected to a support seat (13), and the outer wall of the top of the support seat (13) is fixedly connected to a drive motor (14), and the output shaft of the drive motor (14) is connected to one end of the screw rod (12); The outer wall of one side of the guide plate (11) is fixedly connected to a movable plate (15), and the inner wall of the placement cavity away from the movable plate (15) is fixedly connected to a placement plate (17), and the placement plate (17) is located directly below the first positioning block (26).

2. A spraying device for conformal coating of circuit boards according to claim 1, characterized in that: The bottom outer wall of the first positioning block (26) is fixedly connected to a first sponge pad (27), and the bottom outer walls of the two second positioning blocks (29) are both fixedly connected to a second sponge pad (30).

3. The spraying device for conformal coating of circuit boards according to claim 1, characterized in that: A first rubber pad (16) is fixedly connected to the top outer wall of the movable plate (15), and a second rubber pad (18) is fixedly connected to the top outer wall of the placement plate (17).

4. The spraying device for conformal coating of circuit boards according to claim 1, characterized in that: The two bases (1) are fixedly mounted with a same support plate (8) on opposite sides, the top outer wall of the support plate (8) is provided with a symmetrically arranged second slide rail (19), the inner walls of the two second slide rails (19) are both slidably connected with a second slider, and the top ends of the two second sliders are fixedly connected with a same material collection box (9), the material collection box (9) is located directly below the placement cavity, and a wedge-shaped guide seat (31) is provided on the inner side of the material collection box (9).

5. The spraying device for conformal coating of circuit boards according to claim 1, characterized in that: A material extraction pump (21) is fixedly connected to the outer wall of one side of the paint box (20), the feed port of the material extraction pump (21) is connected to the paint box (20) through a pipeline, and the discharge port of the material extraction pump (21) is connected to a material delivery pipe (22), and the material delivery pipe (22) is a double-pass pipe, and the two bottom ends of the material delivery pipe (22) are respectively connected to two collecting pipes (23).

6. A spraying method for a circuit board conformal coating spraying device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: First, the drive motor (14) is started to drive the screw (12) to rotate, and the screw (12) cooperates with the first slide rail (10) and the first slider to drive the guide plate (11) to move laterally, and the guide plate (11) drives the movable plate (15) to move laterally until the movable plate (15) is located directly below one of the second positioning blocks (29); Step 2: The circuit board to be painted is then placed on top of the placement plate (17) and the movable plate (15), with both sides of the bottom of the circuit board in contact with the first rubber pad (16) and the second rubber pad (18), respectively, to complete the placement of the circuit board; Step 3: Then start the hydraulic cylinder (7) to work, cooperate with the support rod (3) and the guide block (4) to drive the mounting plate (5) to move downward, the mounting plate (5) drives the first fixing frame (25) and the two second fixing frames (28) to move downward, the first fixing frame (25) and the two second fixing frames (28) respectively drive the first positioning block (26) and the two second positioning blocks (29) to move downward, until the first sponge pad (27) and the second sponge pad (30) at the bottom of the first positioning block (26) and one of the second positioning blocks (29) are in contact with the top two sides of the circuit board, thereby playing a role in pressing and stabilizing the circuit board, achieving the positioning effect of the circuit board, and being able to position circuit boards of two different lengths, thereby facilitating the spraying of three-proof paint on the circuit boards of two different lengths, and having good applicability; Step 4: After the circuit board to be painted is positioned, the pump (21) is started to transport the conformal coating in the paint box (20) through the feed pipe (22) to the two collecting pipes (23), and then sprayed onto the surface of the circuit board through the nozzle (24), thereby completing the spraying of the conformal coating on the circuit board; Step 5: When the circuit board is being sprayed, the spilled conformal coating will fall into the collecting box (9) and flow to the bottom of the collecting box (9) through the action of the guide seat (31). After the spraying work is completed, the collecting box (9) can be pulled to move on the support plate (8) through the action of the second slide rail (19) and the second slider. The collecting box (9) can be pulled to one side of the workbench (2), and then the collected conformal coating can be reused, thereby reducing the waste of resources.

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