An efficient PCB board desmear device

Abstract

An efficient device for removing glue residues from PCB boards, comprising a medicine water tank, on which a PCB board rack is provided. On the PCB board rack, there is a vertical movement mechanism, and on the vertical movement mechanism, there is a horizontal movement mechanism. Inside the medicine water tank, there are two water spraying plates, on which water outlet holes are opened. The two water spraying plates are respectively arranged at both ends of the PCB board rack. On the water spraying plates, there is a translation mechanism. Both the two water spraying plates are connected with a water inlet pipe and a water outlet pipe. Between the two water spraying plates, there are two water pumps, and the water pumps are respectively connected with the water inlet pipe on one water spraying plate and the water outlet pipe on the other water spraying plate. Compared with the prior art, the overall structure of the present invention is simple, which can effectively reduce the manufacturing and production costs. The PCB board rack has good mobility in the height direction and the horizontal direction, which can effectively reduce the overall height of the device and improve the space utilization rate. By setting the water spraying plates, a water flow is formed between the PCB boards, which is beneficial to completely removing the glue residues on the PCB boards and accelerating the speed of removing the glue residues from the PCB boards.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board manufacturing, and particularly to an efficient device for removing glue residues from PCB boards. Background Art

[0002] A PCB (Printed Circuit Board), whose Chinese name is printed circuit board and is also called printed wiring board, is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components.

[0003] Currently, the manufacturing process of PCB boards includes: blanking → inner layer pattern → inner layer etching → lamination → drilling → copper deposition including the process of removing glue residues → full board electroplating → outer layer pattern → pattern electroplating → outer layer etching → solder mask → characters → surface treatment → shaping → final inspection → packaging. Among them, the function of copper deposition is to form a conductive copper layer in the holes to make the circuits between layers conduct with each other, and the glue residue removal process must be carried out on the hole walls before copper deposition; however, the reaction in the glue residue removal process often does not proceed thoroughly, resulting in incomplete removal of glue residues.

[0004] Therefore, it is necessary to provide a new and efficient device for removing glue residues from PCB boards to solve the above technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an efficient device for removing glue residues from PCB boards, which has a simple structure, can effectively remove all the glue residues on the PCB boards, and has a high efficiency in removing glue residues.

[0006] The technical solution adopted by the present invention to solve its technical problems is an efficient device for removing glue residues from PCB boards, including a medicine water tank, on which a PCB board rack is provided. On the PCB board rack, there is a vertical movement mechanism, and on the vertical movement mechanism, there is a horizontal movement mechanism. In the medicine water tank, there are two spray plates, on which water outlets are opened. The two spray plates are respectively arranged at both ends of the PCB board rack. On the spray plates, there is a translation mechanism. Both spray plates are connected with a water inlet pipe and a water outlet pipe. Between the two spray plates, there are two water pumps, and the water pumps are respectively connected with the water inlet pipe on one spray plate and the water outlet pipe on the other spray plate.

[0007] Preferably, the vertical movement mechanism includes: a connecting plate, a bracket, and a driving component. The connecting plate is slidably connected to the bracket, the driving component drives the connecting plate to move up and down, the connecting plate is fixedly connected to the PCB board rack, the connecting plate is arranged at the upper end of the PCB board rack, and the driving component is arranged on the bracket.

[0008] Preferably, the driving assembly includes: a first pulley, a second pulley, a rope, and an up-and-down driving motor. One end of the rope is fixedly connected to the connecting plate, and the other end is fixedly connected to the second pulley. The rope bypasses the first pulley. The up-and-down driving motor drives the second pulley to rotate. Both the second pulley and the first pulley are rotatably connected to the bracket. The first pulley is arranged at the upper end of the connecting plate, and the rope between the first pulley and the connecting plate is vertically arranged with respect to the connecting plate.

[0009] Preferably, the driving assembly further includes a long shaft and a first gear. There are two first pulleys and two second pulleys. The second pulleys are sleeved on the long shaft, and the two second pulleys are respectively arranged at both ends of the long shaft. The first gear is also sleeved on the long shaft. The up-and-down driving motor drives the first gear to rotate, thereby driving the second pulleys to rotate.

[0010] Preferably, the horizontal movement mechanism includes a horizontal driving motor and two lead screws. A belt drive mechanism or a chain drive mechanism is arranged between the two lead screws. The horizontal driving motor drives the two lead screws to rotate through the belt drive mechanism or the chain drive mechanism. The lead screws are threadedly connected to the bracket.

[0011] Preferably, the horizontal movement mechanism includes: a lead screw, a guide rod, and a horizontal driving motor. The lead screw is threadedly connected to the bracket. The guide rod is slidably connected to the bracket. The horizontal driving motor drives the lead screw to rotate.

[0012] Preferably, the translation mechanism includes: a connecting rod, straight teeth, a second gear, and a translation motor. The connecting rod is fixedly connected to the water spraying plate and the straight teeth respectively. The straight teeth are arranged at the upper end of the medicine water tank. The straight teeth are meshed with the second gear. The translation motor drives the second gear to rotate. The connecting rod is arranged at the upper end of the straight teeth.

[0013] Preferably, sliders are arranged on the water spraying plate, grooves adapted to the sliders are formed in the bottom of the medicine water tank, and the sliders slide along the grooves.

[0014] Preferably, a water outlet nozzle is communicated with the water outlet. The size of one end of the water outlet nozzle close to the water outlet gradually becomes smaller towards the other end.

[0015] Preferably, a solenoid valve is arranged on the water inlet pipe or the water outlet pipe.

[0016] Compared with the prior art, in the present invention, after the PCB board is installed on the PCB board rack, the vertical driving motor works, and the rope pulls the connecting plate to rise along the bracket. Then the horizontal driving motor rotates, and the PCB board rack moves horizontally above the medicine water tank. The vertical driving motor works again, and the rope pulls the connecting plate to descend along the bracket, and the PCB board is immersed in the medicine water. The translation motor works, and the two water spraying plates move towards the PCB board and stop at the end position of the PCB board. One water pump works, and a water flow is formed between the PCB boards, and the water flow flows from one end of the PCB board to the other end, which is conducive to flushing away the glue residues on the PCB board. Then this water pump stops working, and another water pump works, and the water flow direction between the PCB boards changes. This setting is conducive to flushing away the glue residues on the PCB board from different directions, facilitating the removal of all the glue residues on the PCB board, and at the same time facilitating the acceleration of the glue residue removal speed of the PCB board. The overall structure of the present invention is simple, which can effectively reduce the manufacturing and production costs. The PCB board rack has good mobility in the height direction and the horizontal direction, which can effectively reduce the overall height of the device and improve the space utilization rate. By setting the water spraying plates, a water flow is formed between the PCB boards, which is conducive to removing all the glue residues on the PCB board and accelerating the glue residue removal speed of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic structural diagram of another perspective of the present invention;

[0019] Figure 3 is a schematic structural diagram of the third perspective of the present invention;

[0020] Figure 4 is Figure 1 an enlarged schematic diagram of the structure at A in

[0021] Figure 5 is Figure 1 an enlarged schematic diagram of the structure at B in

[0022] In the figure:

[0023] 1. PCB board rack, 2. vertical moving mechanism, 21. connecting plate, 22. bracket, 23. driving component, 231. first pulley, 232. second pulley, 233. rope, 234. vertical driving motor, 235. long shaft, 236. first gear, 3. horizontal moving mechanism, 31. horizontal driving motor, 32. lead screw, 4. water spraying plate, 41. water outlet, 5. translation mechanism, 51. connecting rod, 52. straight teeth, 53. second gear, 54. translation motor, 6. water inlet pipe, 7. water outlet pipe, 8. water outlet nozzle, 9. medicine water tank, 91. groove. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Referring to the attached Figure 1-5 , this embodiment includes a medicine water tank 9. A PCB board rack 1 is provided on the medicine water tank 9. A vertical movement mechanism 2 is provided on the PCB board rack 1. A horizontal movement mechanism 3 is provided on the vertical movement mechanism 2. Two water spraying plates 4 are provided in the medicine water tank 9. Water outlet holes 41 are formed on the water spraying plates 4. The number of the water outlet holes 41 is multiple, which can improve the efficiency of removing glue from the PCB board. The water outlet holes 41 are arranged on one side of the two water spraying plates 4 facing each other. The water outlet holes 41 are rectangular. The water outlet holes 41 are arranged along the height direction of the medicine water tank 9. The rectangular water outlet holes 41 are convenient for spraying the medicine water into the space between two PCB boards along the height direction of the PCB board, so that the whole medicine water between the PCB boards can flow. The water flow is beneficial to washing the glue residues on the PCB board, facilitating the complete removal of the glue residues on the PCB board and improving the glue removal speed. The two water spraying plates 4 are respectively arranged at both ends of the PCB board rack 1. A translation mechanism 5 is provided on the water spraying plates 4. Water inlet pipes 6 and water outlet pipes 7 are respectively communicated with the two water spraying plates 4. Two water pumps are arranged between the two water spraying plates 4. The water pumps are respectively communicated with the water inlet pipe 6 on one water spraying plate 4 and the water outlet pipe 7 on the other water spraying plate 4. A water inlet pipe 6, a water outlet pipe 7 and a water pump form a circulating water spraying system. This circulating water spraying system sucks the medicine water around one end of the PCB board and then sprays it to the other end of the PCB board, so as to facilitate the formation of water flow between the PCB boards, so that the glue residues on the PCB board can be quickly removed. The two water pumps form two circulating water spraying systems, so that the medicine water can wash the PCB board from different directions. This setting is beneficial to the complete removal of the glue residues on the PCB board.

[0026] The vertical movement mechanism 2 includes: a connecting plate 21, a bracket 22 and a driving component 23. A plurality of bumps are provided at both ends of the connecting plate 21. The bracket 22 is provided with sliding grooves adapted to the bumps. The cooperation of the plurality of bumps and the sliding grooves makes the structure formed by the connecting plate 21 and the bracket 22 more firm when the connecting plate 21 slides up and down along the bracket 22, avoiding the shaking of the PCB board rack 1 at the lower end of the connecting plate 21 and reducing the influence on the glue removal of the PCB board. The connecting plate 21 is slidably connected to the bracket 22. The driving component 23 drives the connecting plate 21 to move up and down. The connecting plate 21 is fixedly connected to the PCB board rack 1. The connecting plate 21 is arranged at the upper end of the PCB board rack 1. The driving component 23 is arranged on the bracket 22.

[0027] The driving assembly 23 includes: a first pulley 231, a second pulley 232, a rope 233, and an up-and-down driving motor 234. One end of the rope 233 is fixedly connected to the connecting plate 21, and the other end is fixedly connected to the second pulley 232. The rope 233 bypasses the first pulley 231. The up-and-down driving motor 234 drives the second pulley 232 to rotate. Both the second pulley 232 and the first pulley 231 are rotatably connected to the bracket 22. The first pulley 231 is arranged at the upper end of the connecting plate 21. The rope 233 between the first pulley 231 and the connecting plate 21 is vertically arranged with respect to the connecting plate 21. This arrangement facilitates pulling up the connecting plate 21 to slide upward and improves the utilization rate of the up-and-down driving motor 234. The up-and-down driving motor 234 and the second pulley 232 are both arranged on one side of the bracket 22 and are both lower than the horizontal position of the first pulley 231. This arrangement facilitates reducing the height of the entire device and improving the space utilization rate.

[0028] The driving assembly 23 further includes a long shaft 235 and a first gear 236. There are two first pulleys 231 and two second pulleys 232. The second pulleys 232 are sleeved on the long shaft 235. The two second pulleys 232 are respectively arranged at both ends of the long shaft 235. The first gear 236 is also sleeved on the long shaft 235. The up-and-down driving motor 234 drives the first gear 236 to rotate, thereby driving the second pulley 232 to rotate. This arrangement facilitates smoothly pulling up and lowering the connecting plate 21. The up-and-down movement of the connecting plate 21 can be achieved by one motor, with a simple structure and low production cost.

[0029] The horizontal movement mechanism 3 includes a horizontal driving motor 31 and two lead screws 32. The two lead screws 32 are respectively arranged at both ends of the bracket 22. A belt drive mechanism or a chain drive mechanism is arranged between the two lead screws 32. The horizontal driving motor 31 drives the two lead screws 32 to rotate through the belt drive mechanism or the chain drive mechanism. The lead screws 32 are threadedly connected to the bracket 22. This arrangement enables the bracket 22 to be better stressed and the bracket 22 to move more smoothly along the lead screws 32.

[0030] The translation mechanism 5 includes: a connecting rod 51, straight teeth 52, a second gear 53, and a translation motor 54. The connecting rod 51 is fixedly connected to the water spraying plate 4 and the straight teeth 52 respectively. The straight teeth 52 are arranged at the upper end of the medicine water tank 9. The straight teeth 52 are meshed with the second gear 53. The translation motor 54 drives the second gear 53 to rotate. The straight teeth 52 are slidably connected to the medicine water tank 9. The medicine water tank 9 is provided with guide grooves. Both sides of the straight teeth 52 are inserted into the guide grooves and slide horizontally along the guide grooves. The translation motor 54 and the second gear 53 are both arranged on the outer wall of the medicine water tank 9. The connecting rod 51 is arranged at the upper end of the straight teeth 52.

[0031] Sliders are provided on the water spraying plate 4, and grooves 91 adapted to the sliders are formed in the bottom of the medicine water tank 9. The sliders slide along the grooves 91. This arrangement facilitates the water spraying plate 4 to move more smoothly, and at the same time improves the firmness of the water spraying plate 4, preventing it from shaking during water spraying and thus affecting the formation of water flow.

[0032] The slider is a semi-cylinder, which has good sliding performance and is conducive to installation.

[0033] A water outlet nozzle 8 is connected to the water outlet 41. The size of one end of the water outlet nozzle 8 close to the water outlet 41 gradually becomes smaller towards the other end. The setting of the water outlet nozzle 8 facilitates the insertion between two PCB boards, enabling a better water flow to be formed between the PCB boards. Moreover, the size of one end of the water outlet nozzle 8 close to the water outlet 41 gradually becomes smaller towards the other end, which can effectively enhance the water pressure, make the chemical solution spray faster, and thus form a better water flow between the PCB boards. In this embodiment, the cross-section of the water outlet nozzle 8 is an isosceles trapezoid.

[0034] A solenoid valve is provided on the water inlet pipe 6 or the water outlet pipe 7. In this embodiment, a solenoid valve is provided in the water inlet pipe 6. When the solenoid valve of the water inlet pipe 6 on one spraying plate 4 is opened, the solenoid valve of the water inlet pipe 6 on the other spraying plate 4 is in the closed state. This setting can avoid the mutual influence of the two circulating spraying systems and reduce the influence on the formation of the water flow.

[0035] Two reference plates are provided on the PCB board rack 1. The two reference plates are respectively arranged at both ends of the PCB board rack 1. The reference plates are installed on the PCB board rack 1 through screws. After the PCB board is installed on the PCB board rack 1, rotate the screws to align the reference plates with the ends of the PCB. A position sensing device is installed on the connecting rod 51. The position sensing device is arranged opposite to the reference plate. This embodiment further includes a controller, and the controller is electrically connected to the position sensing device, the horizontal driving motor 31, the up and down driving motor 234, the translation motor 54, the solenoid valve, and the water pump respectively. When the PCB board is immersed in the chemical solution, the translation motor 54 operates, the spraying plate 4 moves towards the PCB board, and the water outlet nozzle 8 is inserted into the gap between the PCB boards. After the position sensing device senses the reference plate, the translation motor 54 stops operating. This setting can avoid the spraying plate 4 and the water outlet nozzle 8 from damaging the PCB board.

[0036] Embodiment Two

[0037] This embodiment is basically the same as Embodiment One, the difference being that:

[0038] The horizontal moving mechanism 3 includes: a lead screw 32, a guide rod, and a horizontal driving motor 31. The lead screw 32 and the guide rod are respectively arranged at both ends of the bracket 22. The lead screw 32 is threadedly connected to the bracket 22, and the guide rod is slidably connected to the bracket 22. The horizontal driving motor 31 drives the lead screw 32 to rotate, and the bracket 22 slides horizontally along the guide rod. This structure is simple and conducive to reducing the manufacturing cost.

[0039] In the present invention, after the PCB board is installed on the PCB board rack 1, the upper and lower driving motor 234 operates, and the rope 233 pulls the connecting plate 21 to rise along the support 22. Then the horizontal driving motor 31 rotates, and the PCB board rack 1 moves horizontally above the medicine water tank 9. The upper and lower driving motor 234 operates again, and the rope 233 pulls the connecting plate 21 to descend along the support 22, and the PCB board is immersed in the medicine water. The translation motor 54 operates, and the two water spraying plates 4 move towards the PCB board. The water spraying plates 4 stop at the end positions of the PCB board. A water pump operates, and a water flow is formed between the PCB boards. The water flow flows from one end of the PCB board to the other end, which is beneficial to washing away the glue residues on the PCB board. Then this water pump stops operating, and another water pump operates, and the water flow direction between the PCB boards changes. This setting is beneficial to washing away the glue residues on the PCB board from different directions, is beneficial to removing all the glue residues on the PCB board, and is also beneficial to accelerating the glue residue removal speed of the PCB board. The overall structure of the present invention is simple, can effectively reduce the manufacturing and production costs. The mobility of the PCB board rack 1 in the height direction and the horizontal direction is good, can effectively reduce the overall height of the device, and improve the space utilization rate. By setting the water spraying plates 4, a water flow is formed between the PCB boards, which is beneficial to removing all the glue residues on the PCB board and accelerating the glue residue removal speed of the PCB board.

[0040] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An efficient PCB board desmearing device, characterized in that, It includes a medicine water tank, on which there is a PCB board rack. There is a vertical movement mechanism on the PCB board rack, and a horizontal movement mechanism on the vertical movement mechanism. There are two spray plates in the medicine water tank, and water outlet holes are opened on the spray plates. The two spray plates are respectively arranged at both ends of the PCB board rack. There is a translation mechanism on the spray plates. Water inlet pipes and water outlet pipes are connected to both spray plates. There are two water pumps between the two spray plates, and the water pumps are respectively connected to the water inlet pipe on one spray plate and the water outlet pipe on the other spray plate; The translation mechanism includes: a connecting rod, straight teeth, a second gear and a translation motor. The connecting rod is fixedly connected to the spray plate and the straight teeth respectively. The straight teeth are arranged at the upper end of the medicine water tank. The straight teeth are meshed with the second gear. The translation motor drives the second gear to rotate. The connecting rod is arranged at the upper end of the straight teeth; There are sliders on the spray plates, and grooves adapted to the sliders are opened on the bottom of the medicine water tank, and the sliders slide along the grooves; A water outlet nozzle is connected to the water outlet hole, and the size of one end of the water outlet nozzle close to the water outlet hole gradually becomes smaller towards the other end.

2. The efficient PCB board desmear device according to claim 1, characterized in that, The vertical movement mechanism includes: a connecting plate, a bracket and a driving component. The connecting plate is slidably connected to the bracket. The driving component drives the connecting plate to move up and down. The connecting plate is fixedly connected to the PCB board rack. The connecting plate is arranged at the upper end of the PCB board rack. The driving component is arranged on the bracket.

3. The efficient PCB degumming residue device according to claim 2, wherein, The driving component includes: a first pulley, a second pulley, a rope and an up-and-down driving motor. One end of the rope is fixedly connected to the connecting plate, and the other end is fixedly connected to the second pulley. The rope bypasses the first pulley. The up-and-down driving motor drives the second pulley to rotate. Both the second pulley and the first pulley are rotatably connected to the bracket. The first pulley is arranged at the upper end of the connecting plate, and the rope between the first pulley and the connecting plate is vertically arranged with the connecting plate.

4. The efficient PCB degumming residue device according to claim 3, characterized in that, The driving component further includes a long shaft and a first gear. There are two first pulleys and two second pulleys. The second pulleys are sleeved on the long shaft. The two second pulleys are respectively arranged at both ends of the long shaft. The first gear is also sleeved on the long shaft. The up-and-down driving motor drives the first gear to rotate, thereby driving the second pulley to rotate.

5. The efficient PCB degumming residue device according to claim 4, wherein, The horizontal movement mechanism includes a horizontal driving motor and two lead screws. There is a belt drive mechanism or a chain drive mechanism between the two lead screws. The horizontal driving motor drives the two lead screws to rotate through the belt drive mechanism or the chain drive mechanism. The lead screws are threadedly connected to the bracket.

6. The efficient PCB degumming residue device according to claim 4, characterized in that, The horizontal movement mechanism includes: a lead screw, a guide rod and a horizontal driving motor. The lead screw is threadedly connected to the bracket. The guide rod is slidably connected to the bracket. The horizontal driving motor drives the lead screw to rotate.

7. The efficient PCB degumming residue device according to claim 6, characterized in that, An electromagnetic valve is provided on the water inlet pipe or the water outlet pipe.

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