Tin stripping equipment and process for manufacturing PCB (Printed Circuit Board)

Abstract

The invention discloses a tin stripping device and process for PCB manufacturing, and belongs to the technical field of PCB manufacturing. The tin stripping equipment for manufacturing the PCB comprises a frame body, and further comprises a rotating shaft rotationally installed on the frame body, a rotating disc is fixedly installed on the outer wall of the rotating shaft, processing grooves are formed in the outer wall of the rotating disc at equal intervals, and a driving part for driving the rotating shaft to rotate intermittently is arranged on the frame body; the two pairs of spraying pipes are arranged at the upper end of the frame body at equal intervals, each spraying pipe is provided with a spraying head, a lifting part is arranged on the frame body, and after the rotating shaft stops rotating, the lifting part can drive the spraying pipes to ascend and descend in a reciprocating mode; the feeding conveying belt and the discharging conveying belt are fixedly installed on the two sides of the frame body respectively, and after the rotating disc stops rotating, the feeding conveying belt and the discharging conveying belt are aligned to the two processing grooves respectively; according to the invention, the PCB can be in a vertical state, so that the tin stripping effects on the two sides of the PCB are basically the same, and the tin stripping effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board manufacturing, and in particular to a tin stripping device and process for PCB board manufacturing. Background Art

[0002] PCB, whose Chinese name is printed circuit board, is also known as printed circuit board, printed circuit board, circuit board, PCB circuit board, etc. It is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components. Because it is made by electronic printing, it is called a "printed" circuit board. In the production process of printed circuit boards, when a conductive pattern is formed on a double-sided copper-clad laminate by screen printing or photochemical methods, a layer of tin anti-corrosion metal is first plated on the conductive pattern, and the parts outside the circuit pattern are etched away, and then the anti-corrosion metal is faded. The tin plating is to protect the pattern from being damaged during the etching process, and the tin stripping waste liquid is the waste liquid generated when the tin plating that protects the pattern is removed by the tin stripping liquid without damaging the copper substrate.

[0003] In the prior art, the tin stripping process of PCB boards is relatively simple, which mainly involves passing them through a liquid storage pool with tin stripping liquid on an assembly line to complete the tin stripping work. Since the PCB is in a horizontal state when passing through the tin stripping liquid, this will cause a large amount of tin stripping liquid or impurities generated by tin stripping to remain on the upper surface of the PCB board, affecting the subsequent processing and use of the PCB board. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that, since the PCB is in a horizontal state when passing through the tin stripping liquid, a large amount of tin stripping liquid or impurities generated by tin stripping may remain on the upper surface of the PCB board, and a tin stripping device and process for PCB board manufacturing are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tin stripping device for PCB board manufacturing includes a frame, and also includes: a rotating shaft, which is rotatably mounted on the frame, wherein a turntable is fixedly mounted on the outer wall of the rotating shaft, and the outer wall of the turntable is provided with processing grooves arranged at equal intervals, and the frame is provided with a driving part that drives the rotating shaft to rotate intermittently; two pairs of nozzles are arranged at equal intervals on the upper end of the frame, and each of the nozzles is installed with a nozzle, wherein a lifting part is provided on the frame, and when the rotating shaft stops rotating, the lifting part drives the nozzle to reciprocate and rise and fall; a feeding conveyor belt and a discharging conveyor belt are respectively fixedly mounted on both sides of the frame, wherein when the turntable stops rotating, the feeding conveyor belt and the discharging conveyor belt are respectively aligned with the two processing grooves.

[0007] In order to allow the turntable to rotate intermittently, preferably, the driving unit includes a driving motor fixedly mounted on the frame, and the output shaft of the driving motor is fixedly mounted with an incomplete gear, wherein a first ring gear is fixedly mounted at one end of the rotating shaft, and the rotating incomplete gear is indirectly meshed with the first ring gear.

[0008] In order to enable the nozzle to move along the surface of the PCB board, the lifting part further includes a reciprocating screw rotatably connected to the frame, the frame is fixedly connected to a guide rod arranged parallel to the reciprocating screw, the reciprocating screw is threadedly connected to a lifting plate slidably connected to the guide rod, wherein the nozzle is connected to the lifting plate through a vertical pipe, the lower end of the reciprocating screw is fixedly mounted with a driven gear, and the frame is rotatably mounted with a second ring gear meshing with the driven gear, and when the rotating incomplete gear is not meshing with the first ring gear, the incomplete gear will mesh with the second ring gear.

[0009] In order to make the nozzle swing back and forth, further, a sliding column is fixedly connected to the lifting plate, a slide plate is slidably mounted on the slide column, the vertical pipe is fixedly connected to the slide plate, and the top of the reciprocating screw is provided with a shaking part that drives the slide plate to move back and forth horizontally along the sliding column.

[0010] In order to make the slide plate swing back and forth, further, the shaking part includes a disc fixedly connected to the top of the reciprocating screw, and a plurality of protrusions are fixedly connected to the circumferential outer wall of the disc, wherein the outer wall of the disc is attached to the outer wall of the slide plate, and a return spring is installed between the outer wall of the slide plate and the lifting plate.

[0011] In order to facilitate the effective positioning of the PCB board, further, both sides of the processing tank are rotatably connected with a plurality of rollers arranged at equal intervals through a rotating rod, and the outer wall of each roller is provided with an annular groove, and the interior of the annular groove is fixedly connected with a limiting rod, and the outer wall of the turntable is provided with a sewage discharge hole connected to the processing tank.

[0012] In order to allow the PCB board to swing up and down in the processing tank, further, a passive gear is fixedly installed on the outer wall of the rotating rod, a vertical plate is fixedly connected to the lifting plate, and a plurality of groups of racks arranged at equal intervals are fixedly installed on the outer wall of the vertical plate. When the vertical plate slides into the processing tank, the plurality of racks will sweep over the passive gear in turn.

[0013] In order to facilitate the recycling of waste water, preferably, a recycling box is fixedly connected to the frame, the lower end of the turntable of the recycling box is arranged in the recycling box, and a sewage pipe is fixedly connected to the outer wall of the lower end of the recycling box.

[0014] In order to facilitate the detinning work of the PCB board, preferably, three groups of pressure tanks are fixedly connected to the frame, and the three groups of pressure tanks respectively store detinning liquid, cleaning liquid and compressed air. The three groups of pressure tanks are respectively connected to the two pairs of nozzles through hoses.

[0015] A tin stripping process for PCB board manufacturing, the operation steps are as follows:

[0016] Step 1: Make the turntable rotate indirectly;

[0017] Step 2: conveying the PCB boards into multiple processing tanks in sequence;

[0018] Step 3: When the PCB is in a vertical state, desolder, rinse and dry it in turn;

[0019] Step 4: During the process of stripping, rinsing and drying, make the air flow swing back and forth along the surface of the PCB board;

[0020] Step 5: During the process of stripping, rinsing and drying, the PCB board is moved up and down in the treatment tank;

[0021] Step 6: When the PCB is in a downward tilted state, the PCB slides out of the processing tank under the action of gravity.

[0022] Compared with the prior art, the present invention provides a tin stripping device for PCB board manufacturing, which has the following beneficial effects:

[0023] 1. The detinning equipment for PCB board manufacturing drives the turntable to rotate indirectly at a fixed angle through a driving motor. When the processing tank is rotated to open upward, the nozzle will complete the detinning, rinsing and drying of the PCB board through the nozzle. Since the PCB board is in a vertical state, the detinning effect on both sides is basically the same, and the detinning effect is also better.

[0024] 2. The tin stripping equipment for PCB board manufacturing drives the driven gear to rotate through the second ring gear, and the lifting plate drives the nozzle to transport into the processing tank through the vertical pipe and move upward to reset. The nozzle drives the nozzle to move horizontally along both sides of the PCB board to improve the tin stripping, rinsing and drying effects.

[0025] 3. The detinning equipment for PCB board manufacturing drives multiple bumps to press the slide plate in sequence through a disc. The rotating disc will make the nozzle swing back and forth and drive the nozzle to swing back and forth, thereby significantly improving the spraying uniformity of the nozzle and indirectly improving the detinning effect of the PCB board.

[0026] 4. The tin stripping equipment for PCB board manufacturing drives the vertical plate to move up and down through the lifting plate. The vertical plate will drive multiple racks to scan multiple passive gears in sequence. The passive gears will rotate intermittently. The PCB board will move up and down in the processing tank, and the tin, tin stripping liquid and cleaning liquid on the PCB board can fall off more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the first-perspective axonometric structure of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the axonometric structure from a second perspective of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0029] Figure 3 This is a partial isometric structural diagram of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of the axonometric structure of a turntable of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0031] Figure 5 A tin stripping device for PCB board manufacturing proposed by the present invention Figure 4 Schematic diagram of the structure of part A;

[0032] Figure 6 This is a schematic diagram of the axonometric structure of a rotating shaft of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the isometric structure of a nozzle of a tin stripping device for PCB board manufacturing proposed by the present invention;

[0034] Figure 8 This is a schematic diagram of the axonometric structure of a lifting plate of a tin stripping device for PCB board manufacturing proposed by the present invention.

[0035] In the figure: 1. frame; 2. rotating shaft; 3. turntable; 4. feeding conveyor belt; 5. discharging conveyor belt; 6. processing tank; 7. rotating rod; 8. roller; 9. annular groove; 10. limiting rod; 11. drainage hole; 12. nozzle; 13. nozzle; 14. reciprocating screw; 15. guide rod; 16. lifting plate; 17. vertical pipe; 18. first ring gear; 19. driving motor; 20. incomplete gear; 21. second ring gear; 22. driven gear; 23. sliding column; 24. sliding plate; 25. reset spring; 26. disc; 27. bump; 28. pressure tank; 29. ​​hose; 30. passive gear; 31. vertical plate; 32. rack; 33. recovery box; 34. drainage pipe. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0037] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] Embodiment 1:

[0039] Reference Figure 1-Figure 8 , a tin stripping device for PCB board manufacturing, comprising a frame 1, and also comprising: a rotating shaft 2, which is rotatably mounted on the frame 1, wherein a turntable 3 is fixedly mounted on the outer wall of the rotating shaft 2, and the outer wall of the turntable 3 is provided with processing grooves 6 arranged at equal intervals, and the processing grooves 6 are used to place PCB boards, and the frame 1 is provided with a driving part for driving the rotating shaft 2 to rotate intermittently; two pairs of nozzles 12 are arranged at equal intervals on the upper end of the frame 1, and each nozzle 12 is installed with a nozzle 13, and the two groups of nozzles 13 respectively rinse the two sides of the PCB board, wherein a lifting part is provided on the frame 1, and when the rotating shaft 2 stops rotating, the lifting part will drive the nozzle 12 to reciprocate and lift; a feeding conveyor belt 4 and a discharging conveyor belt 5 are respectively fixedly mounted on both sides of the frame 1, wherein when the turntable 3 stops rotating, the feeding conveyor belt 4 and the discharging conveyor belt 5 are respectively aligned with the two processing grooves 6.

[0040] Specifically, when in use, the driving unit drives the turntable 3 to rotate a fixed angle through the rotating shaft 2. When the turntable 3 stops rotating, the PCB board is transported to the processing tank 6 aligned with it through the feeding conveyor belt 4, and the automatic loading work of the processing tank 6 can be completed. When the processing tank 6 gradually rotates to tilt downward, the PCB board inside will slide down onto the discharge conveyor belt 5. When the processing tank 6 rotates to open upward, it will pass through three pairs of nozzles 12 in sequence. When the turntable 3 temporarily stops rotating, the first pair of nozzles 12 will spray the tin stripping liquid onto the outer walls of both sides of the PCB board through the nozzle 13, and the tin stripping work of the PCB board has been completed. Since the PCB board is in a vertical position state, so the tin stripping effect on both sides is basically the same, and the tin stripping effect is better, and when passing through the second pair of nozzles 12, the second pair of nozzles 12 will spray the rinsing liquid to both sides of the PCB board through the nozzle 13, so as to rinse the residual tin stripping liquid and sewage on both sides of the PCB board, and when passing through the third pair of nozzles 12, the third pair of nozzles 12 will blow the cleaning liquid on the surface of the PCB board through the nozzle 13, so as to complete the efficient tin stripping work of the PCB board; the lifting part will drive the nozzle 12 to transport into the processing tank 6 and move upward to reset, and the nozzle 12 will drive the nozzle 13 to move horizontally along both sides of the PCB board to improve the tin stripping, rinsing and drying effects.

[0041] Both sides of the above-mentioned processing tank 6 are rotatably connected with multiple rollers 8 arranged at equal intervals through a rotating rod 7, and the outer wall of each roller 8 is provided with an annular groove 9, and the inside of the annular groove 9 is fixedly connected with a limiting rod 10, and the outer wall of the turntable 3 is provided with a sewage discharge hole 11 connected to the processing tank 6.

[0042] Specifically, when the PCB board is inserted into the processing tank 6, the PCB board will be stuck in the annular grooves 9 of the rollers 8 on both sides, so that the PCB board is kept in the middle of the processing tank 6, so as to facilitate the effective positioning of the PCB board. When the PCB board is subjected to the tin stripping treatment, the waste liquid generated will be discharged from the processing tank 6 through the drain hole 11.

[0043] A recovery box 33 is fixedly connected to the frame 1, the lower end of the turntable 3 of the recovery box 33 is arranged in the recovery box 33, and a sewage pipe 34 is fixedly connected to the outer wall of the lower end of the recovery box 33; therefore, when waste liquid is discharged from the sewage hole 11, the waste liquid will be collected by the recovery box 33 and discharged through the sewage pipe 34, thereby facilitating the collection and treatment of the waste liquid.

[0044] Embodiment 2:

[0045] Reference Figure 1-Figure 3 as well as Figure 6 , which is basically the same as the first embodiment, and further discloses a specific implementation scheme of the driving unit.

[0046] The above-mentioned driving part includes a driving motor 19 fixedly mounted on the frame 1, and an incomplete gear 20 is fixedly mounted on the output shaft of the driving motor 19, and the number of teeth of the incomplete gear 20 is less than half, wherein a first ring gear 18 is fixedly mounted on one end of the rotating shaft 2, and the rotating incomplete gear 20 is indirectly meshed with the first ring gear 18.

[0047] Specifically, when in use, start the drive motor 19, the drive motor 19 can drive the incomplete gear 20 to rotate, and the incomplete gear 20 will intermittently engage with the first ring gear 18, and the first ring gear 18 will indirectly rotate a fixed angle, and drive the turntable 3 to rotate a fixed angle through the rotating shaft 2. Every time the turntable 3 stops, the output end of the feed conveyor belt 4 and the input end of the discharge conveyor belt 5 will just face the port of the processing tank 6.

[0048] Embodiment three:

[0049] Reference Figure 1-Figure 3 as well as Figure 7 , which is basically the same as the second embodiment, and further discloses a specific implementation scheme of the lifting part.

[0050] The above-mentioned lifting part includes a reciprocating screw 14 rotatably connected to the frame body 1, a guide rod 15 arranged parallel to the reciprocating screw 14 is fixedly connected to the frame body 1, and a lifting plate 16 slidably connected to the guide rod 15 is threadedly connected to the reciprocating screw 14, wherein the nozzle 12 is connected to the lifting plate 16 through a vertical pipe 17, and a driven gear 22 is fixedly installed at the lower end of the reciprocating screw 14, and a second ring gear 21 meshing with the driven gear 22 is rotatably installed on the frame body 1, and when the rotating incomplete gear 20 is not meshing with the first ring gear 18, the incomplete gear 20 will mesh with the second ring gear 21.

[0051] Specifically, when the incomplete gear 20 is not meshed with the first ring gear 18, the incomplete gear 20 will mesh with the second ring gear 21, and the second ring gear 21 will drive the driven gear 22 to rotate, and the driven gear 22 will drive the reciprocating screw 14 to rotate, and the reciprocating screw 14 will drive the lifting plate 16 to reciprocate up and down once, and the lifting plate 16 will drive the nozzle 12 to transport into the processing tank 6 through the vertical pipe 17 and move upward to reset, and the nozzle 12 will drive the nozzle 13 to move horizontally along both sides of the PCB board to improve the detinning, rinsing and drying effects.

[0052] Three groups of pressure tanks 28 with internal pressure are fixedly connected to the above-mentioned frame 1. The three groups of pressure tanks 28 respectively store tin stripping liquid, cleaning liquid and compressed air. The three groups of pressure tanks 28 are connected to the two pairs of nozzles 12 through hoses 29, and solenoid valves are installed in the hoses 29. When the nozzle 12 needs to spray liquid and gas through the nozzle 13, the solenoid valve can be opened.

[0053] Embodiment 4:

[0054] Reference Figure 4-Figure 8 , which is basically the same as the third embodiment, and further, a specific implementation scheme for making the nozzle 12 swing is specifically added.

[0055] The lifting plate 16 is fixedly connected with a slide column 23, which is perpendicular to the reciprocating screw 14. A slide plate 24 is slidably mounted on the slide column 23. The vertical tube 17 is fixedly connected to the slide plate 24. The top of the reciprocating screw 14 is provided with a shaking portion for driving the slide plate 24 to move horizontally back and forth along the slide column 23. The shaking portion includes a disk 26 fixedly connected to the top of the reciprocating screw 14. A plurality of protrusions 27 are fixedly connected to the circumferential outer wall of the disk 26. The number of the protrusions 27 is 3-12, and the preferred number in this application is 6. The outer wall of the disk 26 is fitted on the outer wall of the slide plate 24, and a return spring 25 is installed between the slide plate 24 and the outer wall of the lifting plate 16.

[0056] Specifically, when the PCB board is inserted into the processing tank 6, the PCB board will be stuck in the annular grooves 9 of the rollers 8 on both sides, so that the PCB board is kept in the middle of the processing tank 6, which makes it easier to extend the nozzle 12 into the processing tank 6. When the reciprocating screw 14 rotates, the reciprocating screw 14 will drive the disc 26 to rotate, and the disc 26 will drive multiple protrusions 27 to press the slide plate 24 in sequence. When the slide plate 24 is pressed, it will drive the nozzle 12 to translate along the axis. When the slide plate 24 is not pressed by the protrusions 27, the reset spring 25 will drive the slide plate 24 to move in the opposite direction and reset, and drive the nozzle 12 to move in the opposite direction and reset. Therefore, the rotating disc 26 will cause the nozzle 12 to swing back and forth, and drive the nozzle 13 to swing back and forth, thereby significantly improving the spraying uniformity of the nozzle 13, and indirectly improving the tin stripping effect of the PCB board.

[0057] A passive gear 30 is fixedly installed on the outer wall of the rotating rod 7, a vertical plate 31 is fixedly connected to the lifting plate 16, and a plurality of groups of racks 32 arranged at equal intervals are fixedly installed on the outer wall of the vertical plate 31. The number of racks 32 is 3 to 8 groups, and the preferred number in this application is 5 groups. When the vertical plate 31 slides into the processing tank 6, the plurality of racks 32 will sweep over the passive gear 30 in sequence.

[0058] Specifically, when the lifting plate 16 moves up and down, the lifting plate 16 will also drive the vertical plate 31 to move up and down, and the vertical plate 31 will drive multiple racks 32 to scan multiple passive gears 30 in sequence, and the passive gear 30 will rotate intermittently, and the passive gear 30 will drive the roller 8 to rotate through the rotating rod 7, and the roller 8 will drive the PCB board in the annular groove 9 to lift toward the opening direction of the processing tank 6. When the rack 32 is not engaged with the passive gear 30, the PCB board will reset downward under the action of gravity and liquid flushing. Therefore, when multiple racks 32 scan the passive gear 30 in sequence, the PCB board will move up and down in the processing tank 6, and the tin, tin stripping liquid and cleaning liquid on the PCB board can fall off more efficiently, and under the action of the swinging nozzle 13, the PCB board tin stripping work can be completed more efficiently.

[0059] A tin stripping process for PCB board manufacturing, the operation steps are as follows:

[0060] Step 1: Make the turntable 3 rotate indirectly;

[0061] Step 2: conveying the PCB boards into a plurality of processing tanks 6 in sequence;

[0062] Step 3: When the PCB is in a vertical state, desolder, rinse and dry it in turn;

[0063] Step 4: During the process of stripping, rinsing and drying, make the air flow swing back and forth along the surface of the PCB board;

[0064] Step 5: During the process of stripping, rinsing and drying, the PCB board is swung up and down in the processing tank 6;

[0065] Step 6: When the PCB is in a downwardly tilted state, the PCB slides out of the processing tank 6 under the action of gravity.

[0066] When the tin stripping equipment for PCB manufacturing is used, the driving motor 19 is started, and the driving motor 19 can drive the incomplete gear 20 to rotate, and the incomplete gear 20 will intermittently mesh with the first ring gear 18, and the first ring gear 18 will indirectly rotate a fixed angle, and drive the turntable 3 to rotate a fixed angle through the rotating shaft 2. When the turntable 3 stops rotating, the PCB board is transported to the processing tank 6 aligned with it through the feeding conveyor belt 4, and the automatic loading work of the processing tank 6 can be completed. When the processing tank 6 gradually rotates to tilt downward, the PCB board inside will slide down and fall onto the discharge conveyor belt 5.

[0067] When the processing tank 6 rotates to the point where the opening faces upward, it will pass through three pairs of nozzles 12 in sequence, and when the incomplete gear 20 is not meshed with the first ring gear 18, the turntable 3 will temporarily stop rotating. At this time, the first pair of nozzles 12 will spray the tin stripping liquid to the outer walls on both sides of the PCB board through the nozzle 13, and the tin stripping work of the PCB board has been completed. Since the PCB board is in a vertical state, the tin stripping effect on both sides is basically the same, and the tin stripping effect is better. When passing through the second pair of nozzles 12, the second pair of nozzles 12 will spray the flushing liquid to both sides of the PCB board through the nozzle 13 to flush the residual tin stripping liquid and sewage on both sides of the PCB board. When passing through the third pair of nozzles 12, the third pair of nozzles 12 will blow the cleaning liquid on the surface of the PCB board through the nozzle 13 to complete the efficient tin stripping work of the PCB board.

[0068] When the incomplete gear 20 is not meshed with the first ring gear 18, the incomplete gear 20 will mesh with the second ring gear 21, and the second ring gear 21 will drive the driven gear 22 to rotate, and the driven gear 22 will drive the reciprocating screw 14 to rotate, and the reciprocating screw 14 will drive the lifting plate 16 to reciprocate up and down once, and the lifting plate 16 will drive the nozzle 12 to transport into the processing tank 6 through the vertical pipe 17 and move upward to reset, and the nozzle 12 will drive the nozzle 13 to move horizontally along both sides of the PCB board to improve the detinning, rinsing and drying effects.

[0069] When the PCB board is inserted into the processing tank 6, the PCB board will be stuck in the annular grooves 9 of the rollers 8 on both sides, so that the PCB board is kept in the middle of the processing tank 6, which makes it easier to extend the nozzle 12 into the processing tank 6. When the reciprocating screw 14 rotates, the reciprocating screw 14 will drive the disc 26 to rotate, and the disc 26 will drive multiple protrusions 27 to press the slide plate 24 in sequence. When the slide plate 24 is pressed, it will drive the nozzle 12 to translate along the axis. When the slide plate 24 is not pressed by the protrusions 27, the reset spring 25 will drive the slide plate 24 to move in the opposite direction and reset, and drive the nozzle 12 to move in the opposite direction and reset. Therefore, the rotating disc 26 will cause the nozzle 12 to swing back and forth, and drive the nozzle 13 to swing back and forth, thereby significantly improving the spraying uniformity of the nozzle 13, and indirectly improving the tin stripping effect of the PCB board.

[0070] When the lifting plate 16 moves up and down, the lifting plate 16 will also drive the vertical plate 31 to move up and down, and the vertical plate 31 will drive multiple racks 32 to scan multiple passive gears 30 in sequence, and the passive gear 30 will rotate intermittently, and the passive gear 30 will drive the roller 8 to rotate through the rotating rod 7, and the roller 8 will drive the PCB board in the annular groove 9 to lift toward the opening direction of the processing tank 6. When the rack 32 is not engaged with the passive gear 30, the PCB board will reset downward under the action of gravity and liquid flushing. Therefore, when multiple racks 32 scan the passive gear 30 in sequence, the PCB board will move up and down in the processing tank 6, and the tin, tin stripping liquid and cleaning liquid on the PCB board can fall off more efficiently, and under the action of the swinging nozzle 13, the tin stripping work of the PCB board can be completed more efficiently.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A tin stripping device for PCB board manufacturing, comprising a frame (1), characterized in that: Also includes: The rotating shaft (2) is rotatably mounted on the frame (1). A rotating disk (3) is fixedly mounted on the outer wall of the rotating shaft (2), and the outer wall of the rotating disk (3) is provided with processing grooves (6) arranged at equal intervals, and the frame (1) is provided with a driving part for driving the rotating shaft (2) to rotate intermittently; Two pairs of nozzles (12) are arranged at equal intervals on the upper end of the frame (1), and each nozzle (12) is equipped with a nozzle (13). Wherein, the frame (1) is provided with a lifting part, and when the rotating shaft (2) stops rotating, the lifting part will drive the nozzle (12) to move up and down reciprocatingly; The feeding conveyor belt (4) and the discharging conveyor belt (5) are respectively fixedly mounted on both sides of the frame (1). Wherein, when the rotating disk (3) stops rotating, the feeding conveyor belt (4) and the discharging conveyor belt (5) are respectively aligned with the two processing tanks (6).

2. A tin stripping device for PCB board manufacturing according to claim 1, characterized in that: The driving unit comprises a driving motor (19) fixedly mounted on the frame (1), and an incomplete gear (20) is fixedly mounted on the output shaft of the driving motor (19). A first ring gear (18) is fixedly mounted on one end of the rotating shaft (2), and the rotating incomplete gear (20) is indirectly meshed with the first ring gear (18).

3. A tin stripping device for PCB board manufacturing according to claim 2, characterized in that: The lifting part comprises a reciprocating screw (14) rotatably connected to a frame (1); a guide rod (15) arranged parallel to the reciprocating screw (14) is fixedly connected to the frame (1); a lifting plate (16) slidably connected to the guide rod (15) is threadedly connected to the reciprocating screw (14); The nozzle (12) is connected to the lifting plate (16) through a vertical pipe (17), a driven gear (22) is fixedly installed at the lower end of the reciprocating screw (14), and a second ring gear (21) meshing with the driven gear (22) is rotatably installed on the frame (1), and when the rotating incomplete gear (20) does not mesh with the first ring gear (18), the incomplete gear (20) will mesh with the second ring gear (21).

4. A tin stripping device for PCB board manufacturing according to claim 3, characterized in that: The lifting plate (16) is fixedly connected with a slide column (23), a slide plate (24) is slidably mounted on the slide column (23), the vertical pipe (17) is fixedly connected to the slide plate (24), and a shaking part is provided at the top of the reciprocating screw (14) for driving the slide plate (24) to move horizontally back and forth along the slide column (23).

5. A tin stripping device for PCB board manufacturing according to claim 4, characterized in that: The shaking part comprises a disc (26) fixedly connected to the top of the reciprocating screw (14), and a plurality of protrusions (27) are fixedly connected to the circumferential outer wall of the disc (26). The outer wall of the disk (26) is attached to the outer wall of the slide plate (24), and a return spring (25) is installed between the outer wall of the slide plate (24) and the lifting plate (16).

6. A tin stripping device for PCB board manufacturing according to claim 3, characterized in that: Both sides of the processing tank (6) are rotatably connected to a plurality of rollers (8) arranged at equal intervals via a rotating rod (7), and the outer wall of each roller (8) is provided with an annular groove (9), the interior of the annular groove (9) is fixedly connected to a limiting rod (10), and the outer wall of the rotating disk (3) is provided with a sewage discharge hole (11) connected to the processing tank (6).

7. A tin stripping device for PCB board manufacturing according to claim 6, characterized in that: A passive gear (30) is fixedly mounted on the outer wall of the rotating rod (7); a vertical plate (31) is fixedly connected to the lifting plate (16); a plurality of racks (32) arranged at equal intervals are fixedly mounted on the outer wall of the vertical plate (31); when the vertical plate (31) slides into the processing tank (6), the plurality of racks (32) will sequentially sweep over the passive gear (30).

8. The tin stripping equipment for PCB board manufacturing according to claim 1, characterized in that: A recovery box (33) is fixedly connected to the frame (1), the lower end of the turntable (3) of the recovery box (33) is arranged in the recovery box (33), and a sewage pipe (34) is fixedly connected to the outer wall of the lower end of the recovery box (33).

9. The tin stripping device for PCB board manufacturing according to claim 1, characterized in that: Three groups of pressure tanks (28) are fixedly connected to the frame (1), and the three groups of pressure tanks (28) respectively store tin stripping liquid, cleaning liquid and compressed air. The three groups of pressure tanks (28) are respectively connected to the two pairs of nozzles (12) through hoses (29).

10. A tin stripping process for PCB board manufacturing, comprising a tin stripping device for PCB board manufacturing according to any one of claims 1 to 9, characterized in that: The steps are as follows: Step 1: Make the turntable (3) rotate indirectly; Step 2: conveying the PCB boards into a plurality of processing tanks (6) in sequence; Step 3: When the PCB is in a vertical state, desolder, rinse and dry it in turn; Step 4: During the process of stripping, rinsing and drying, make the air flow swing back and forth along the surface of the PCB board; Step 5: During the process of desoldering, rinsing and drying, the PCB board is swung up and down in the treatment tank (6); Step 6: When the PCB is in a downwardly tilted state, the PCB slides out of the processing tank (6) under the action of gravity.

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