A cleaning device for printed circuit board production

Abstract

The present invention provides a cleaning device for printed circuit board production, which belongs to the technical field of circuit board cleaning, and includes a machine body and a spray gun. The machine body is provided with a base, and the base is provided with a clamping mechanism and a supporting mechanism; the clamping mechanism includes a transverse slide rail, a clamping plate assembly slidably connected to the transverse slide rail, the clamping plate assembly includes a lower clamping plate, an upper clamping plate arranged on the lower clamping plate, a guide column connecting the upper clamping plate and the lower clamping plate, and a compression spring is connected between the upper clamping plate and the guide column; the supporting mechanism includes a supporting plate fixedly connected to the base, a transverse air rail fixedly connected to the supporting plate, a longitudinal air rail slidably connected to the transverse air rail, and an air bag slidably connected to the longitudinal air rail. The present invention can not only support the flexible circuit board and reduce the shaking of the flexible circuit board, but also form a channel at the position of the components on the rigid double-sided board, so that the dry ice airflow passes through the channel, thereby improving the cleaning effect of the component pins.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board cleaning, and in particular to a cleaning device for producing printed circuit boards. Background Art

[0002] Printed circuit boards are made of conductive circuits and component packages by printing. Their main function is to achieve the fixed installation of electronic components and the electrical connection between pins, so as to realize various special functions of electrical appliances. Circuit boards can be divided into single-sided boards, double-sided boards, and multi-layer boards according to the number of conductive layers of components, and can be divided into flexible circuit boards and rigid circuit boards according to the substrate. During the manufacturing process, circuit boards may be contaminated with dirt such as dust, metal and non-metal and their oxide debris in the surrounding environment. Therefore, it is usually necessary to clean the circuit boards. The cleaning methods of circuit boards include chemical solvent cleaning and dry ice cleaning. Although chemical solvents can remove stains, there is a risk of potential damage to electronic components. Dry ice cleaning uses extremely low-temperature dry ice particles to spray on the treated object under the action of compressed air, so that the dirt on its surface is rapidly frozen to brittle and burst. When the dry ice particles drill into the cracks of the dirt, they immediately vaporize and expand in volume, thereby taking the dirt away from the surface of the object and reducing damage to electronic components. However, for flexible circuit boards, dry ice particles may cause the circuit boards to shake during the spraying process, affecting the quality of the circuit boards. For double-sided boards, the soldered components will block some pins, which are difficult to clean directly using dry ice cleaning.

[0003] The patent application document with publication number CN118060263A discloses a circuit board cleaning device, including a base; a water tank is fixedly connected to the top surface of the base, and a plurality of uniformly arranged ultrasonic vibrators are fixedly connected to the bottom surface of the water tank. The cleaning device cleans the surface of the circuit board by vibrating cleaning liquid, but when cleaning a double-sided circuit board, the components will block part of the pins, and the cleaning effect is not ideal. Therefore, it is necessary to develop a cleaning device for printed circuit board production suitable for cleaning flexible circuit boards and double-sided circuit boards. Summary of the invention

[0004] In view of this, the present invention provides a cleaning device for printed circuit board production, aiming to solve the technical problem that the prior art is not applicable to the cleaning of flexible circuit boards and double-sided circuit boards.

[0005] In order to solve the above technical problems, the present invention provides a cleaning device for printed circuit board production, comprising a body and a spray gun arranged on the body, a base is fixedly arranged on the body, and a clamping mechanism and a supporting mechanism are arranged on the base;

[0006] The clamping mechanism comprises a transverse slide rail arranged on the base, a clamping plate assembly slidably connected to the transverse slide rail and capable of clamping the circuit board, the clamping plate assembly comprises a lower clamping plate slidably connected to the transverse slide rail, an upper clamping plate arranged on the lower clamping plate, and a guide column connecting the upper clamping plate and the lower clamping plate, and a compression spring is connected between the upper clamping plate and the guide column;

[0007] The support mechanism comprises a support plate fixedly connected to the base, a transverse air rail fixedly connected to the support plate, a longitudinal air rail slidably connected to the transverse air rail, and an air bag slidably connected to the longitudinal air rail.

[0008] By adopting the above technical solution, the upper clamp and the lower clamp clamp the circuit board, the compression spring applies pressure to fix the circuit board, and the lower clamp is slidably connected to the transverse slide rail, and the position of the two clamp assemblies can be adjusted to facilitate clamping circuit boards of different sizes. The longitudinal air rail can slide horizontally on the transverse air rail, and the airbag is inflated and can be raised and lowered on the longitudinal slide rail. The airbag can achieve horizontal and vertical movement. When cleaning the flexible circuit board, the two clamp assemblies clamp the two ends of the circuit board, and the expanded airbag is located below the circuit board to support the circuit board, thereby reducing the vibration of the flexible circuit board during dry ice cleaning. When cleaning the double-sided board, the two clamp assemblies clamp the two ends of the circuit board, and the airbag is located above the circuit board. The airbag forms a channel on the circuit board, and the expanded airbag is attached to the upper part of the components, leaving the lower part empty. During cleaning, the dry ice airflow is difficult to overflow from all directions, and will pass through the gaps of the components of the circuit board. At this time, the pins of the components in the air can be cleaned by the carried dry ice particles. The present invention can not only support the flexible circuit board, reduce the shaking of the flexible circuit board, and reduce the accumulation of dry ice at the via hole position on the circuit board, but also form a channel at the position of the components on the rigid double-sided board, so that the dry ice airflow passes through the channel, thereby improving the cleaning effect of the component pins.

[0009] Preferably, both ends of the transverse slide rail on the base are rotatably connected to pulleys, and both ends of the transverse slide rail are fixedly connected to synchronous connecting blocks below the lower clamping plate near the two ends, a synchronous belt is connected between the two pulleys and one synchronous connecting block, and a motor that can drive the pulleys to rotate is fixedly provided on the base.

[0010] By adopting the above technical solution, the motor drives the pulley to rotate, and drives the synchronous connecting block to move through the synchronous belt, thereby realizing the movement of the synchronous connecting block, and then drives the lower clamping plate and the upper clamping plate to move, and the distance between the two clamping plate assemblies can be adjusted. Circuit boards of different sizes can be clamped, which is convenient for cleaning circuit boards of different sizes.

[0011] Preferably, both ends of the pulley are rotatably connected with an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are respectively located at both ends of the transverse slide rail, and the upper connecting plate, the transverse slide rail and the lower connecting plate are connected by bolts.

[0012] By adopting the above technical solution, the pulley is rotatably connected between the upper connecting plate and the lower connecting plate, and the upper connecting plate and the lower connecting plate are connected to the transverse slide rail by bolts to limit the sliding position of the clamping plate assembly.

[0013] Preferably, the motor is located at one end of the transverse slide rail, and the motor is located below the lower connecting plate. The rotating shaft of the motor passes through the lower connecting plate and is key-connected to the pulley. The other end of the transverse slide rail is fixedly connected with a support block, and the support block is located below the lower connecting plate, and the support block is fixedly connected to the lower connecting plate.

[0014] By adopting the above technical solution, the rotating shaft of motor 1 is rotatably connected to the lower connecting plate, and the support block supports the other end of the transverse slide rail, so that the clamping plate assembly can slide horizontally along the transverse slide rail.

[0015] Preferably, two airbags are provided, and the two airbags are respectively located between the two clamping plate assemblies. A slider is slidably connected to the longitudinal air rail, and the airbag is fixedly connected to the slider.

[0016] By adopting the above technical solution, two air bags can be attached to the two ends of the double-sided board or supported under the flexible circuit board, and the middle channel is used for the circulation of dry ice particles to improve the cleaning effect.

[0017] Preferably, a support frame is fixedly connected to the top of the machine body, a longitudinal screw is rotatably connected to the support frame, a mobile frame is slidably connected to the longitudinal screw, a transverse screw is rotatably connected to the mobile frame, a support seat is slidably connected to the transverse screw, and the spray gun is fixedly connected to the support seat.

[0018] By adopting the above technical solution, the movable frame can slide along the longitudinal lead screw, and the support seat can slide along the transverse lead screw, so as to realize the movement of the spray gun and facilitate the cleaning of the circuit board.

[0019] Preferably, a second motor capable of driving the longitudinal screw to rotate is fixedly connected to the bottom of the support frame, and a third motor capable of driving the transverse screw to rotate is fixedly connected to one end of the movable frame.

[0020] By adopting the above technical solution, motor 2 drives the longitudinal screw to rotate to move the movable frame, and motor 3 drives the transverse screw to rotate to move the support seat, so that the spray gun can clean the circuit board.

[0021] Preferably, the support frame is fixedly connected to a longitudinal guide rod, the movable frame is slidably connected to the longitudinal guide rod, the movable frame is fixedly connected to a transverse guide rod, and the support seat is slidably connected to the transverse guide rod.

[0022] By adopting the above technical solution, the longitudinal guide rod guides the longitudinal movement of the movable frame, and the transverse guide rod guides the transverse movement of the support seat, thereby increasing the stability of the movement of the spray gun.

[0023] The beneficial effects of the above technical solution of the present invention are as follows:

[0024] 1. The present invention can not only support the flexible circuit board, reduce the shaking of the flexible circuit board, and reduce the accumulation of dry ice at the via hole position on the circuit board, but also form a channel at the position of the components on the rigid double-sided board, so that the dry ice airflow passes through the channel, thereby improving the cleaning effect of the component pins.

[0025] 2. The clamping plate assembly of the present invention can move along the transverse slide rail, and the distance between the two clamping plate assemblies can be adjusted. It can clamp circuit boards of different sizes, and is convenient for cleaning circuit boards of different sizes.

[0026] 3. The movable frame of the present invention can slide along the longitudinal lead screw, and the support seat can slide along the transverse lead screw, so as to realize the movement of the spray gun and facilitate the cleaning of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a cleaning device for printed circuit board production of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the support mechanism and the clamping structure of the present invention;

[0029] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0030] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0031] Figure 5 It is a structural schematic diagram of the splint assembly of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the support mechanism of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the spray gun, the support seat and the movable frame of the present invention.

[0034] In the figure: 1. body; 2. spray gun; 3. base; 4. clamping mechanism; 5. supporting mechanism; 6. clamping plate assembly; 7. longitudinal air rail; 8. transverse air rail; 9. support plate; 10. guide column; 11. upper connecting plate; 12. upper clamping plate; 13. lower clamping plate; 14. transverse slide rail; 15. lower connecting plate; 16. support block; 17. motor one; 18. pulley; 19. synchronous connecting block; 20. compression spring; 21. slider; 22. air bag; 23. motor three; 24. transverse screw; 25. longitudinal guide rod; 26. longitudinal screw; 27. motor two; 28. support frame; 29. ​​transverse guide rod; 30. moving frame; 31. support seat. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 7 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0036] Example

[0037] This embodiment provides a cleaning device for printed circuit board production, such as Figure 1 As shown, it comprises a machine body 1 and a spray gun 2 arranged on the machine body 1, a base 3 is fixedly arranged on the machine body 1, and a clamping mechanism 4 and a supporting mechanism 5 are arranged on the base 3;

[0038] like Figure 1 , Figure 2 , Figure 5 As shown, the clamping mechanism 4 includes a transverse slide rail 14 and a clamping plate assembly 6 arranged on the base 3. Two transverse slide rails 14 are provided, and two clamping plate assemblies 6 are provided, which clamp the two ends of the circuit board respectively. The clamping plate assembly 6 includes a lower clamping plate 13, a guide column 10 and an upper clamping plate 12. The lower clamping plate 13 is slidably connected to the transverse slide rail 14. The guide column 10 is slidably connected to the upper clamping plate 12 and the lower clamping plate 13. A compression spring 20 is connected between the upper clamping plate 12 and the guide column 10. The upper clamping plate 12 and the lower clamping plate 13 clamp the circuit board, and the compression spring 20 applies pressure to fix the circuit board. The lower clamping plate 13 is slidably connected to the transverse slide rail 14. The positions of the two clamping plate assemblies 6 can be adjusted to facilitate clamping circuit boards of different sizes.

[0039] like Figure 2-Figure 5As shown, both ends of the transverse rail 14 on the base 3 are rotatably connected with pulleys 18, and both ends of the lower clamping plate 13 near the transverse rail 14 are fixedly connected with synchronous connection blocks 19, and a synchronous belt is connected between the two pulleys 18 and the synchronous connection block 19. A motor 17 that can drive the pulley 18 to rotate is fixedly provided on the base 3. Both ends of the pulley 18 are rotatably connected with an upper connecting plate 11 and a lower connecting plate 15, and the upper connecting plate 11 and the lower connecting plate 15 are respectively located at the two ends of the transverse rail 14. The upper connecting plate 11, the transverse rail 14, and the lower connecting plate 15 are connected by bolts. The motor 17 is located at one end of the transverse rail 14, and the motor 17 is located below the lower connecting plate 15. The rotating shaft of the motor 17 passes through the lower connecting plate 15 and is key-connected with the pulley 18. The other end of the transverse rail 14 is fixedly connected with a support block 16, and the support block 16 is located below the lower connecting plate 15, and the support block 16 is fixedly connected to the lower connecting plate 15.

[0040] The motor 17 drives the pulley 18 to rotate, and drives the synchronous connection block 19 to move through the synchronous belt, so as to realize the movement of the synchronous connection block 19, and then drives the lower clamping plate 13 and the upper clamping plate 12 to move, and can adjust the distance between the two clamping plate assemblies 6, and can clamp circuit boards of different sizes, so as to facilitate the cleaning of circuit boards of different sizes. The support block 16 supports the other end of the transverse slide rail 14, and the pulley 18 is rotatably connected between the upper connecting plate 11 and the lower connecting plate 15. The upper connecting plate and the lower connecting plate are connected to the transverse slide rail 14 by bolts, so as to limit the sliding position of the clamping plate assembly 6.

[0041] like Figure 2 and Figure 6 As shown, the support mechanism 5 includes a support plate 9, a transverse air rail 8, a longitudinal air rail 7 and an air bag 22. The support plate 9 is fixedly connected to the base 3, the transverse air rail 8 is fixedly connected to the support plate 9, the longitudinal air rail 7 is slidably connected to the transverse air rail 8, a slider 21 is slidably connected to the longitudinal air rail 7, and the air bag 22 is fixedly connected to the slider 21. Two air bags 22 are provided, and the two air bags 22 are respectively located between the two clamping plate assemblies 6. The two air bags 22 can be attached to the two ends of the double-sided board or supported under the flexible circuit board. The middle channel is used for the circulation of dry ice particles to improve the cleaning effect.

[0042] Each airbag 22 is provided with a longitudinal air rail 7 and a transverse air rail 8. The longitudinal air rail 7 can slide horizontally on the transverse air rail 8. The airbag 22 is inflated and can be raised and lowered on the longitudinal slide rail. The airbag 22 can move horizontally and vertically. When cleaning the flexible circuit board, the two clamping plate assemblies 6 clamp the two ends of the circuit board. The two inflated airbags 22 are located below the circuit board to support the circuit board, reducing the vibration of the flexible circuit board during dry ice cleaning. The channel between the two airbags 22 is used for the circulation of dry ice particles to improve the cleaning effect. When cleaning the double-sided board, the two clamping plate assemblies 6 clamp the two ends of the circuit board. The two airbags 22 are located at the two ends above the circuit board to form a channel on the circuit board. The inflated airbags 22 are attached to the upper part of the components, leaving the lower part empty. During cleaning, the dry ice airflow is difficult to overflow from all directions and will pass through the gaps between the components on the circuit board. At this time, the pins of the components in the air can be cleaned by the carried dry ice particles. This embodiment can not only support the flexible circuit board, reduce the shaking of the flexible circuit board, and reduce the accumulation of dry ice at the via positions on the circuit board, but also form a channel at the position of the components on the rigid double-sided board, so that the dry ice airflow passes through the channel, thereby improving the cleaning effect of the component pins.

[0043] like Figure 1 and Figure 7 As shown, a support frame 28 is fixedly connected to the upper part of the machine body 1, a longitudinal lead screw 26 is rotatably connected to the support frame 28, a mobile frame 30 is slidably connected to the longitudinal lead screw 26, a transverse lead screw 24 is rotatably connected to the mobile frame 30, a support seat 31 is slidably connected to the transverse lead screw 24, and the spray gun 2 is fixedly connected to the support seat 31. A motor 27 capable of driving the longitudinal lead screw 26 to rotate is fixedly connected to the lower part of the support frame 28, and a motor 3 23 capable of driving the transverse lead screw 24 to rotate is fixedly connected to one end of the mobile frame 30. A longitudinal guide rod 25 is fixedly connected to the support frame 28, the mobile frame 30 is slidably connected to the longitudinal guide rod 25, a transverse guide rod 29 is fixedly connected to the mobile frame 30, and the support seat 31 is slidably connected to the transverse guide rod 29.

[0044] The second motor 27 drives the longitudinal lead screw 26 to rotate, so that the moving frame 30 can slide along the longitudinal lead screw 26, and the third motor 23 drives the transverse lead screw 24 to rotate, so that the support seat 31 can slide along the transverse lead screw 24, so as to realize the movement of the spray gun 2, and facilitate the cleaning of the circuit board. The longitudinal guide rod 25 guides the longitudinal movement of the moving frame 30, and the transverse guide rod 29 guides the transverse movement of the support seat 31, so as to increase the stability of the movement of the spray gun 2.

[0045] The method of using this embodiment is as follows:

[0046] When cleaning the flexible circuit board, start the air source, the inflated airbag 22 slides down along the longitudinal air rail 7, the circuit board is placed above the airbag 22, start the motor 17, adjust the distance between the two clamping plate assemblies 6, the two clamping plate assemblies 6 clamp the two ends of the circuit board, start the air source, the airbag 22 moves along the transverse air rail 8 to support the circuit board, start the motor 27, the longitudinal screw 26 rotates, the moving frame 30 drives the spray gun 2 to move downward, start the motor 3 23, the transverse screw 24 rotates, the support seat 31 drives the spray gun 2 to move, and the circuit board is cleaned;

[0047] When cleaning a rigid double-sided board, start the air source, the inflated airbag 22 slides up along the longitudinal air rail 7, place the circuit board under the airbag 22, start the motor 17, adjust the distance between the two clamping plate assemblies 6, and the two clamping plate assemblies 6 clamp the two ends of the circuit board, start the air source, the airbag 22 moves along the transverse air rail 8, fits the two ends of the circuit board, start the motor 27, the longitudinal screw 26 rotates, the moving frame 30 drives the spray gun 2 to move downward, start the motor 3 23, the transverse screw 24 rotates, and the support seat 31 drives the spray gun 2 to move, and the circuit board is cleaned.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cleaning device for printed circuit board production, comprising a body and a spray gun arranged on the body, characterized in that: A base is fixedly arranged on the machine body, and a clamping mechanism and a supporting mechanism are arranged on the base; The clamping mechanism comprises a transverse slide rail arranged on the base, a clamping plate assembly slidably connected to the transverse slide rail and capable of clamping the circuit board, the clamping plate assembly comprises a lower clamping plate slidably connected to the transverse slide rail, an upper clamping plate arranged on the lower clamping plate, and a guide column connecting the upper clamping plate and the lower clamping plate, and a compression spring is connected between the upper clamping plate and the guide column; The support mechanism includes a support plate fixedly connected to the base, a transverse air rail fixedly connected to the support plate, a longitudinal air rail slidably connected to the transverse air rail, and an air bag slidably connected to the longitudinal air rail; The longitudinal air rail can slide horizontally on the transverse air rail, and the airbag can be inflated and raised and lowered on the longitudinal air rail. The airbag can achieve horizontal and vertical movement; When cleaning the flexible circuit board, the two clamping plate assemblies clamp the two ends of the flexible circuit board, and the inflated airbag is located below the flexible circuit board to support the flexible circuit board; when cleaning the double-sided board, the two clamping plate assemblies clamp the two ends of the double-sided board, and the airbag is located above the double-sided board. The airbag forms a channel on the double-sided board, and the inflated airbag fits the upper part of the components, leaving the lower part empty. During cleaning, the dry ice airflow is difficult to overflow from all directions and will pass through the gaps between the components of the double-sided board.

2. The cleaning device for printed circuit board production according to claim 1, characterized in that: The base is rotatably connected to pulleys at both ends of the transverse slide rail, a synchronous connecting block is fixedly connected to both ends of the transverse slide rail below a lower clamping plate, a synchronous belt is connected between the two pulleys and one synchronous connecting block, and a motor that can drive the pulleys to rotate is fixedly provided on the base.

3. The cleaning device for printed circuit board production according to claim 2, characterized in that: Both ends of the pulley are rotatably connected with an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are respectively located at the two ends of the transverse slide rail, and the upper connecting plate, the transverse slide rail and the lower connecting plate are connected by bolts.

4. The cleaning device for printed circuit board production according to claim 3, characterized in that: The motor 1 is located at one end of the transverse slide rail, and the motor 1 is located below the lower connecting plate. The rotating shaft of the motor 1 passes through the lower connecting plate and is key-connected to the pulley. The other end of the transverse slide rail is fixedly connected with a support block, and the support block is located below the lower connecting plate, and the support block is fixedly connected to the lower connecting plate.

5. The cleaning device for printed circuit board production according to claim 4, characterized in that: Two airbags are provided, and the two airbags are respectively located between the two clamping plate assemblies. A slider is slidably connected to the longitudinal air rail, and the airbag is fixedly connected to the slider.

6. The cleaning device for printed circuit board production according to claim 5, characterized in that: A support frame is fixedly connected to the top of the machine body, a longitudinal screw is rotatably connected to the support frame, a moving frame is slidably connected to the longitudinal screw, a transverse screw is rotatably connected to the moving frame, a support seat is slidably connected to the transverse screw, and the spray gun is fixedly connected to the support seat.

7. The cleaning device for printed circuit board production according to claim 6, characterized in that: A second motor capable of driving the longitudinal lead screw to rotate is fixedly connected to the lower portion of the support frame, and a third motor capable of driving the transverse lead screw to rotate is fixedly connected to one end of the movable frame.

8. The cleaning device for printed circuit board production according to claim 7, characterized in that: The support frame is fixedly connected with a longitudinal guide rod, the movable frame is slidably connected with the longitudinal guide rod, the movable frame is fixedly connected with a transverse guide rod, and the support seat is slidably connected with the transverse guide rod.

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