Simple PCBA cleaning machine

Abstract

The invention relates to the technical field of PCBA production and processing, in particular to a simple PCBA cleaning machine which comprises a cleaning box body, and the interior of the cleaning box body is divided into a cleaning area and a drying area; the cleaning area comprises a box door, a washing liquid cleaning tank and a mixed ionized water cleaning tank, the washing liquid cleaning tank and the mixed ionized water cleaning tank are located at the bottom in the cleaning box body, a carrier plate is jointly installed above the washing liquid cleaning tank and the mixed ionized water cleaning tank, the top of the carrier plate is connected with a first driving rod and a motor, and two hanging frames are arranged below the carrier plate. Two air cylinders are installed on the carrying plate, the telescopic ends of the two air cylinders penetrate through the carrying plate and then are connected with the two hanging frames, and a plurality of PCBA clamps are arranged in the two hanging frames. The PCBA cleaning and drying device is small in size, a cleaning area and a drying area of the PCBA are integrated in one box body, the whole device is semi-automatic and stops while cleaning is conducted, the PCBA cleaning and drying device is suitable for small enterprises or reduced-yield enterprises, cleaning of a certain yield can be met, high efficiency can be guaranteed, energy consumption is low, operation cost is low, and occupied space is small.

Description

Technical Field

[0001] The invention relates to the technical field of PCBA production and processing, and in particular to a simple PCBA cleaning machine. Background Art

[0002] PCBA is a completed circuit board composed of printed circuit board + patch, etc. During the PCBA production process, solder paste, solder, solder wire, etc. are required for welding. The flux will produce residues on the PCBA surface during the welding process, forming pollution, and it is the main pollutant. These residues not only affect the appearance, but also have a serious impact on the quality of PCBA. Therefore, the cleaning of PCBA is very important.

[0003] At present, PCBA cleaning is divided into automatic cleaning and manual cleaning. Automatic cleaning is basically a larger production line, which is suitable for companies with larger production volumes. However, as some companies have reduced production, automatic cleaning lines are not suitable for companies with reduced production. Automatic line cleaning requires sufficient output, high energy consumption, and high operating costs, while manual cleaning is relatively costly and inefficient.

[0004] Therefore, a simple PCBA cleaning machine is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a simple PCBA cleaning machine in order to solve the above problems, which improves the problem that the existing automated cleaning line is not suitable for use by enterprises that reduce production, and manual cleaning is relatively costly and inefficient.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions: a simple PCBA cleaning machine, comprising a cleaning box,

[0007] The cleaning box is divided into a cleaning area and a drying area;

[0008] The cleaning area includes a box door, a washing liquid cleaning tank and a mixed ion water cleaning tank at the bottom of the cleaning box body, a carrier plate is installed above the washing liquid cleaning tank and the mixed ion water cleaning tank, a driving rod and a motor are connected to the top of the carrier plate, two racks are provided below the carrier plate, two cylinders are installed on the carrier plate, the telescopic ends of the two cylinders respectively penetrate the carrier plate and are connected to the two racks, multiple groups of PCBA fixtures are arranged in the two racks, and the two racks correspond to the washing liquid cleaning tank and the mixed ion water cleaning tank respectively;

[0009] The drying area includes a plurality of drying boxes stacked in sequence, each drying box being equipped with an independent hinged door.

[0010] Preferably, a cover plate is connected to the top of the bracket, a gear ring 1 is arranged on the periphery of the cover plate, the cover plate is connected to the telescopic end of the cylinder through a bearing, a motor is installed in the space between the detergent cleaning tank and the mixed ion water cleaning tank, a driving end of the motor is connected to a driving rod 2, a gear plate is connected to the top of the driving rod, after the cylinder pushes the bracket downward, the two gear rings 1 mesh with the gear plate, this part is a centrifugal structure and a driving structure, which can allow the two brackets to perform centrifugal motion at the same time, so that there is no need to set a separate driving structure for centrifugal motion on each bracket or there is no need to set a separate corresponding driving structure after each cleaning step, so that the interior of the entire device is more compact and ingenious.

[0011] Preferably, the rack is movably connected to the multiple sets of PCBA fixtures inside it.

[0012] Preferably, the hanger and the PCBA fixture are in contact with each other in a stepped shape, and the length of the upper area of ​​the PCBA fixture in the hanger is greater than the length of the PCBA fixture.

[0013] Preferably, the cover plate is connected to the bracket via a pull rod, the top of the bracket has a circular hole, the circular hole has two symmetrical protrusions, the pull rod has a through groove, the two protrusions are in the through groove, the height of the through groove is consistent with the height of the protrusion, and the length of the through groove is greater than the length of the protrusion.

[0014] Preferably, the PCBA fixture is composed of a support plate and a plurality of groups of convex strips 1 equidistantly distributed on the support plate, and each group of convex strips 1 includes a plurality of convex strips.

[0015] Preferably, the interior of the support plate has a flat groove, the upper end surface of the support plate is provided with a plurality of movable grooves, each movable groove is between two adjacent groups of convex strips 1, and the plurality of movable grooves are interconnected with the flat groove. The bottom of the support plate has two symmetrical vertical grooves, the vertical grooves are interconnected with the flat groove, a flat plate is provided in the flat groove, a group of convex strips 2 is provided between two adjacent groups of convex strips 1, each group of convex strips 2 has a plurality of convex strips 2, each group of convex strips 2 is fixed to the flat plate, a threaded rod is provided in the vertical groove, the threaded rod is fixed to the flat plate, the width of the vertical groove is consistent with the width of the threaded rod, and the bottom of the threaded rod extends from the vertical groove and is threadedly connected with a nut.

[0016] Preferably, the cleaning area further comprises a support tube installed in the cleaning box, the cross section of the support tube is L-shaped, and the carrier plate moves in the support tube via rollers installed at the bottom thereof.

[0017] Preferably, the motor at the bottom of the second driving rod is connected to a lifting module, and the lifting module is fixed to the inside of the cleaning box.

[0018] The beneficial effects of the present invention are:

[0019] 1. This device is small in size, and the cleaning area and drying area of ​​PCBA are concentrated in one box. The whole device is semi-automatic and can be stopped at any time. It is suitable for small enterprises or enterprises with reduced production. It can not only meet the cleaning needs of a certain output, but also ensure high efficiency, low energy consumption, low operating cost and small footprint.

[0020] 2. The internal structure of the device is simple and easy to operate, especially the drying part, which is divided into multiple parts. It is suitable for drying a small amount of PCBA after cleaning each time. If it is not necessary, there is no need to open the entire drying area together, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the cleaning area structure of the present invention;

[0023] Figure 3 This is a schematic diagram of a front cutaway view of a rack in the present invention;

[0024] Figure 4 This is a schematic diagram of the PCBA fixture structure in the present invention;

[0025] Figure 5 It is a schematic diagram of the top view structure of the gear plate and the cover plate in the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure between the cover plate and the rack in the present invention;

[0027] Figure 7 This is a schematic diagram of the cutaway structure of the PCBA fixture in the present invention;

[0028] Figure 8 It is a schematic diagram of the top view structure of the PCBA fixture in the present invention.

[0029] In the figure: 1. cleaning box; 2. box door; 3. drying box; 4. support cylinder; 5. carrier plate; 6. roller; 7. driving rod 1; 8. cylinder; 9. rack; 10. washing liquid cleaning tank; 11. mixed ion water cleaning tank; 12. PCBA fixture; 121. support plate; 122. convex strip 1; 13. driving rod 2; 14. gear plate; 15. bearing; 16. cover plate; 17. gear ring 1; 18. pull rod; 19. round hole; 20. convex block; 21. through groove; 22. movable groove; 23. flat groove; 24. vertical groove; 25. flat plate; 26. convex strip 2; 27. threaded rod; 28. nut; 29. ​​lifting module. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] When implementing: Figure 1-8 As shown, a simple PCBA cleaning machine includes a cleaning box 1, and the cleaning box 1 is divided into a cleaning area and a drying area;

[0032] The cleaning area includes a box door 2, a washing liquid cleaning tank 10 and a mixed ion water cleaning tank 11 at the bottom of the cleaning box 1, the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11 are each connected with a liquid inlet pipe and a liquid discharge pipe, a carrier plate 5 is installed above the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11, the top of the carrier plate 5 is connected with a driving rod 7 and a motor, and under the drive of the motor, the carrier plate 5 uses a roller 6 to move in a support tube 4, and the support tube 4 has openings on the upper and lower sides. There are two racks 9 below the carrier plate 5, and two cylinders 8 are installed on the carrier plate 5. The telescopic ends of the two cylinders 8 pass through the carrier plate 5 and are connected to the two racks 9. Multiple groups of PCBA fixtures 12 are arranged in the two racks 9, and the two racks 9 correspond to the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11 respectively;

[0033] The drying area comprises a plurality of drying boxes 3 stacked in sequence, each drying box 3 being equipped with an independent hinged door.

[0034] When the PCBA needs to be cleaned, the box door 2 is opened, the PCBA is placed in the PCBA fixture 12 in the hanger 9 and clamped, the motor drives the carrier plate 5 to rotate through the driving rod 7, so that the hanger 9 with the uncleaned PCBA inside corresponds to the top of the washing liquid cleaning tank 10, as the cylinder 8 drives the hanger 9 to descend, the hanger 9 gradually enters the washing liquid cleaning tank 10 for immersion, and the washing liquid removes the solder paste on the PCBA. After the immersion is completed, the hanger 9 is driven by the cylinder 8 to rise, and at the same time, the motor drives the carrier plate 5 to rotate again through the driving rod 9, so that the hanger 9 is transferred to the top of the mixed ion water cleaning tank 11, and the hanger 9 is driven by the cylinder 8 to continue to descend and enter the mixed ion water cleaning tank 11, and the ion crystals remaining in the washing liquid are removed by the mixed ion water.

[0035] In the above process, since there are two hangers 9, the other hanger 9 automatically rotates to the top of the washing liquid cleaning tank 10, and then the uncleaned PCBA is placed in the fixture in the hanger 9 and cleaned, and the previously cleaned PCBA is taken out and placed in a drying box 3 for drying.

[0036] In the above, please refer to Figure 2 In the two cleaning processes, in order to increase the cleaning efficiency and to perform centrifugal motion after cleaning, the residual liquid on the PCBA is removed. Therefore, a driving structure is added between the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11. The driving structure can simultaneously drive the two racks 9 to perform centrifugal motion. Specifically, a cover plate 16 is connected to the top of the rack 9, and a gear ring 17 is arranged on the periphery of the cover plate 16. The cover plate 16 is connected to the telescopic end of the cylinder 8 through a bearing 15. A motor is installed in the space between the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11. The driving end of the motor is connected to a driving rod 2 13, and the top of the driving rod 13 is connected to a gear plate 14. After the cylinder 8 pushes the rack 9 downward, the two gear rings 17 are meshed with the gear plate 14.

[0037] That is, when the two racks 9 enter the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11 respectively, the gear ring 17 on the outer periphery of the two cover plates 16 will mesh with the gear plate 14 at the same time, and the gear plate 14 drives the two racks 9 to rotate, cleaning while performing centrifugal motion to accelerate the cleaning effect. After cleaning on both sides, the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11 both use drain pipes to discharge the internal liquid. After the liquid is emptied, centrifugal motion dehydration treatment is performed. Of course, without discharging the liquid, the racks 9 and the driving structure of the centrifugal motion can be synchronously driven to rise by the cylinder 8 and the lifting module 29, so that the two racks 9 are separated from the washing liquid cleaning tank 10 and the mixed ion water cleaning tank 11 and perform centrifugal motion.

[0038] Through the above structure, the cleaning structure and the centrifugal structure can be compactly arranged together to reduce the size of the entire equipment.

[0039] The overall profile of the hanger 9 can be cylindrical, and the PCBA fixture 12 can be disc-shaped or rectangular. A symmetrical discharge port is set on the hanger 9. Since the hanger 9 is rotated, the discharge port may not be able to face the box door 2. In order to facilitate material collection, it is necessary to ensure that the discharge port of the hanger 9 can be adjusted to face the box door 2 when taking materials. For this purpose, the cover plate 16 is connected to the hanger 9 by a pull rod 18. The top of the hanger 9 has a circular hole 19, and the circular hole 19 has two symmetrical protrusions 20. The pull rod 18 is provided with a through groove 21, and two protrusions 20 are located in the through groove 21. The height of the through groove 21 is consistent with the height of the protrusion 20, and the length of the through groove 21 is greater than the length of the protrusion 20. That is, when the box door 2 is opened, if the discharge port is not facing the direction of the box door 2, the hanger 9 can be manually rotated so that the hanger 9 rotates on the pull rod 18, that is, the pull rod 18 and the top stroke of the hanger 9 rotate, and the protrusion 20 on the top of the hanger 9 rotates in the through groove 21 of the pull rod 18, providing a rotatable and adjustable range for the hanger 9.

[0040] In order to allow the PCBA to be conveniently and quickly placed in the rack 9, the rack 9 is movably connected to the multiple sets of PCBA fixtures 12 inside it, that is, the PCBA fixtures 12 can be taken out of the rack 9, and the PCBA fixtures 12 can be used as a tray during PCBA processing. The processed PCBA can be placed in the PCBA fixtures 12 and then placed in the rack 9;

[0041] Among them, the contacting grounds of the hanger 9 and the PCBA fixture 12 are both stepped. In the hanger 9, the length of the upper area of ​​the PCBA fixture 12 is greater than the length of the PCBA fixture 12, that is, the space in the upper area of ​​the PCBA fixture 12 is larger. In this way, when the PCBA fixture 12 is placed in the hanger 9, the PCBA fixture 12 first enters the upper area and then sits down. This can ensure that when there is a PCBA on the PCBA fixture 12, there will be no spatial obstruction, and instead of directly pushing it in horizontally from the discharge port of the hanger 9, the downward sitting method can prevent the PCBA fixture 12 from being thrown out when the hanger 9 performs centrifugal motion.

[0042] Also, see Figure 4 The PCBA fixture 12 is composed of a support plate 121 and a plurality of groups of convex strips 122 equidistantly distributed on the support plate 121. Each group of convex strips 122 has a plurality of convex strips 122, that is, the PCBA is clamped between two adjacent groups of convex strips 122. Each group of convex strips 122 is in point contact with the PCBA, rather than surface contact, so that the surface of the PCBA is more in contact with the cleaning liquid, etc., and can adapt to the PCBA having patch components;

[0043] See also Figure 8 The interior of the support plate 121 has a flat groove 23, and the upper end surface of the support plate 121 is provided with a plurality of movable grooves 22, each movable groove 22 is located between two adjacent groups of convex strips 122, and the plurality of movable grooves 22 are interconnected with the flat groove 23. The bottom of the support plate 121 has two symmetrical vertical grooves 24, and the vertical grooves 24 are interconnected with the flat groove 23. The flat groove 23 has a flat plate 25, and a group of convex strips 2 26 is provided between the two adjacent groups of convex strips 122, and each group of convex strips 26 has a plurality of convex strips 26, and each group of convex strips 26 is fixed to the flat plate 25. The vertical groove 24 has a threaded rod 27, and the threaded rod 27 is fixed to the flat plate 25. The width of the vertical groove 24 is consistent with the width of the threaded rod 27, and the bottom of the threaded rod 27 extends from the vertical groove 24 and is threadedly connected with a nut 28;

[0044] In the above, by loosening the nut 28, the threaded rod 27 can be moved in the vertical groove 24, and the movement of the threaded rod 27 drives the plate 25 to move, and the movement of the plate 25 drives the second convex strip 26, that is, the distance between the second convex strip 26 and the first convex strip 122 can be adjusted to adapt to PCBAs of different thicknesses, thereby increasing the adaptability of the entire device.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A simple PCBA cleaning machine, comprising a cleaning box (1), characterized in that: The cleaning box (1) is divided into a cleaning area and a drying area; The cleaning area comprises a box door (2), a washing liquid cleaning tank (10) and a mixed ion water cleaning tank (11) located at the bottom of the cleaning box (1), a carrier plate (5) is installed above the washing liquid cleaning tank (10) and the mixed ion water cleaning tank (11), the top of the carrier plate (5) is connected to a driving rod (7) and a motor, two hangers (9) are provided below the carrier plate (5), two cylinders (8) are installed on the carrier plate (5), the telescopic ends of the two cylinders (8) respectively penetrate the carrier plate (5) and are connected to the two hangers (9), a plurality of groups of PCBA fixtures (12) are arranged in the two hangers (9), and the two hangers (9) respectively correspond to the washing liquid cleaning tank (10) and the mixed ion water cleaning tank (11); The drying area comprises a plurality of drying boxes (3) stacked in sequence, and each drying box (3) is equipped with an independent hinged door.

2. The simple PCBA cleaning machine according to claim 1, characterized in that: The top of the hanging bracket (9) is connected to a cover plate (16), and a gear ring (17) is arranged on the periphery of the cover plate (16). The cover plate (16) is connected to the telescopic end of the cylinder (8) through a bearing (15). A motor is installed in the space between the washing liquid cleaning tank (10) and the mixed ion water cleaning tank (11). The driving end of the motor is connected to a driving rod (13), and the top of the driving rod (13) is connected to a gear plate (14). After the cylinder (8) pushes the hanging bracket (9) downward, the two gear rings (17) are meshed with the gear plate (14).

3. The simple PCBA cleaning machine according to any one of claims 1-2, characterized in that: The hanger (9) is movably connected to multiple groups of PCBA fixtures (12) inside it.

4. The simple PCBA cleaning machine according to claim 3 is characterized in that: The hanger (9) and the PCBA fixture (12) are in contact with each other in a stepped manner, and the length of the upper region of the PCBA fixture (12) in the hanger (9) is greater than the length of the PCBA fixture (12).

5. The simple PCBA cleaning machine according to claim 2, characterized in that: The cover plate (16) and the hanger (9) are connected via a pull rod (18); the top of the hanger (9) is provided with a circular hole (19), and the circular hole (19) is provided with two symmetrical protrusions (20); the pull rod (18) is provided with a through groove (21), and the two protrusions (20) are located in the through groove (21); the height of the through groove (21) is consistent with the height of the protrusion (20), and the length of the through groove (21) is greater than the length of the protrusion (20).

6. The simple PCBA cleaning machine according to claim 3, characterized in that: The PCBA fixture (12) is composed of a support plate (121) and a plurality of groups of convex strips (122) equidistantly distributed on the support plate (121), and each group of convex strips (122) contains a plurality of convex strips (122).

7. The simple PCBA cleaning machine according to claim 6, characterized in that: The support plate (121) has a flat groove (23) inside, and a plurality of movable grooves (22) are opened on the upper end surface of the support plate (121). Each movable groove (22) is located between two adjacent groups of convex strips (122). The plurality of movable grooves (22) are interconnected with the flat groove (23). The bottom of the support plate (121) has two symmetrical vertical grooves (24). The vertical grooves (24) are interconnected with the flat groove (23). A flat plate (25) is provided in the flat groove (23). The two adjacent groups of convex strips (122) are connected to each other. A group of protruding strips (26) is arranged between the protruding strips (122), each group of protruding strips (26) has a plurality of protruding strips (26), each group of protruding strips (26) is fixed to the plate (25), a threaded rod (27) is arranged in the vertical groove (24), the threaded rod (27) is fixed to the plate (25), the width of the vertical groove (24) is consistent with the width of the threaded rod (27), the bottom of the threaded rod (27) extends out from the vertical groove (24) and is threadedly connected with a nut (28).

8. The simple PCBA cleaning machine according to claim 1, characterized in that: The cleaning area also includes a support cylinder (4) installed in the cleaning box (1), the cross section of the support cylinder (4) is L-shaped, and the carrier plate (5) moves in the support cylinder (4) via a roller (6) installed at the bottom thereof.

9. The simple PCBA cleaning machine according to claim 2, characterized in that: The motor at the bottom of the second driving rod (13) is connected to a lifting module (29), and the lifting module (29) is fixed inside the cleaning box (1).

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