Circuit board solder mask automatic screen printing machine and process

Abstract

The invention relates to the field of circuit board anti-welding screen printing, in particular to a circuit board anti-welding automatic screen printing machine and process, and solves the problems that an existing circuit board anti-welding screen printing machine is inconvenient to position and poor in universality, and the machining efficiency cannot be improved. The ink scraping device comprises a rack, a first guide rail, a sliding frame, a machining table plate, a second guide rail, a second guide block, an ink scraping module, a sliding way, a round hole, a sliding plate frame, a clamping plate, a triangular frame, an abutting top base, a supporting plate, a cylinder, a tray and a driving assembly, the driving assembly is used for driving the sliding plate frame to slide or driving the supporting plate to slide upwards, and a steering assembly is arranged on the supporting plate; the machine frame is further provided with a steering assembly, the steering assembly is used for driving the circuit board supported on the tray to steer when the supporting plate moves upwards, and the machine frame is further provided with a discharging assembly which is used for discharging the circuit board after screen printing of the circuit board is finished. The screen printing machine and the process have the characteristics of high automation degree, high processing efficiency and precision and universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit board solder mask screen printing, in particular to a circuit board solder mask automatic screen printing machine and process. BACKGROUND

[0002] The circuit board solder mask automatic screen printing machine is a device for automatically completing solder mask ink printing in the circuit board manufacturing process. The specific principle is that the circuit board is accurately conveyed to the printing position through the automatic control system, and the positioning system ensures the accuracy of the circuit board position. Then, the squeegee system applies a certain pressure and speed on the screen to make the solder mask ink pass through the pattern part on the screen and be extruded to the surface of the circuit board, completing the printing of the solder mask ink, and finally the printed circuit board is sent out of the printing area.

[0003] The existing circuit board solder mask automatic screen printing machine is generally composed of a screen frame, a squeegee system, an ink receiving object positioning platform, an ink conveying system, an automatic control unit, a feeding and discharging device, a visual positioning system, etc. However, the existing circuit board automatic screen printing machine needs to manually place the circuit board in the center after feeding the circuit board, or uses a special positioning mold to position the circuit board to facilitate alignment with the squeegee system, and the discharging is also manually operated. This way, manual operation is used in many links, which leads to the inability to further improve the processing efficiency, and the positioning is not universal, and manual placement also produces errors. Therefore, a circuit board solder mask automatic screen printing machine and process are proposed. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application proposes a circuit board solder mask automatic screen printing machine and process to solve the problems of inconvenient positioning, poor universality and inability to improve the processing efficiency of the existing circuit board solder mask screen printing machine.

[0005] In order to solve the above technical problems, the basic technical scheme proposed by the present application is as follows: A circuit board solder mask automatic screen printing machine, comprising a rack, a front and rear parallel guide rail one is installed at the bottom of the rack, and a sliding frame is slidably arranged between the front and rear guide rails one, the upper end of the sliding frame is provided with a machining table plate, the upper end of the front and rear sides of the rack is provided with a guide rail two, a guide block two is slidably arranged in the guide rail two, a squeegee module is installed on the guide block two, a plurality of sliding grooves are formed on the upper end surface of the machining table plate, and a circular hole is also formed in the center of the upper end surface of the machining table plate, a sliding plate frame is symmetrically slidably arranged on the front and rear sides below the machining table plate, a clamping plate is slidably connected on one side of the sliding plate frame on the two sides, and the clamping plate penetrates and slides in the sliding groove, and a triangular frame is further connected to the clamping plate; The lower end of the processing platform is connected with a triangular frame inclined surface slidingly abutting against the top seat, the lower end surface of the processing platform is slidingly provided with a supporting plate, and a cylinder is rotatably sleeved in the supporting plate, the upper end of the cylinder is connected with a tray in a circular hole, a driving assembly is arranged on the sliding frame, the driving assembly is used for driving the sliding plate frame to slide or driving the supporting plate to slide upward, a steering assembly is arranged on the supporting plate, the steering assembly is used for driving the circuit board supported on the tray to steer when the supporting plate moves upward, and a discharging assembly is further arranged on the rack, and the discharging assembly is used for discharging the circuit board after screen printing of the circuit board is completed.

[0006] Preferably, the ink scraping module comprises a device frame, a screen frame and a scraper, the front and rear ends of the device frame are respectively connected to the mutually close one ends of the two guide blocks two slidingly arranged in the two guide rails two, the screen frame is installed below the device frame, the scraper is provided with two and is slidingly arranged in the device frame and slidingly abuts against the upper end of the screen frame, and the two sides of the sliding frame are both connected with guide strips slidingly connected in the guide rail one.

[0007] Preferably, the lower end surface of the processing platform is connected with guide rods one parallel to the slideways on the mutually close sides, the guide rods one are on the mutually far sides of the left and right slideways, the two ends of the guide rods one are connected to the lower end surface of the processing platform, the two ends of the sliding plate frame are slidingly sleeved on the outer sides of the two guide rods one, and the mutually close one ends of the sliding plate frames on the front and rear sides are both connected with spring one sleeved on the outer sides of the guide rods one between the distal ends of the guide rods one on the respective sides.

[0008] Preferably, the mutually close one ends of the processing platform are both connected with slide rod seats one below the slideways, the lower end of the clamping plate is slidingly sleeved on the outer side of the slide rod seat one, and the lower end of the clamping plate is connected with spring two sleeved on the outer side of the slide rod seat one between the lower end of the clamping plate and the lower end of the slide rod seat one.

[0009] Preferably, the lower end surface of the processing platform is connected with guide rods two on the left and right sides, the two sides of the supporting plate are slidingly sleeved on the outer sides of the guide rods two, and the supporting plate is connected with spring three sleeved on the outer sides of the guide rods two between the lower end surface of the processing platform and the guide rods two.

[0010] Preferably, the driving assembly comprises slide rod seats two, sleeve seats, telescopic pieces one and connecting plates, the slide rod seats two are connected to the lower end surfaces of the sliding plate frames, the sleeve seats are slidingly sleeved on the outer sides of the slide rod seats two, the telescopic pieces one are installed on the lower inner walls of the sliding frames, the connecting plates are connected to the output ends of the telescopic pieces one, the two ends of the connecting plates are both rotatably connected with turning plates between the sleeve seats on the two sides, and the upper end surface of the connecting plate abuts against the lower end surface of the supporting plate.

[0011] Preferably, the steering assembly comprises a worm gear, a worm, a ratchet, a guide rod three, a slide, a limiting sleeve frame, a ratchet bar, the worm gear is sleeved on the outer side of the cylinder, the worm is rotatably installed on the upper end of the support plate and is located on one side of the worm gear and is in meshing connection with the worm gear, the ratchet is connected at both ends of the worm, the guide rod three is connected at the lower end surface of the support plate, the slide is provided with two and is respectively slidably sleeved on the outer sides of the two guide rods three, the lower end of the slide and the lower end surface of the support plate are connected with the spring four sleeved on the outer side of the guide rod three, the limiting sleeve frame is connected on the slide, one end of the ratchet bar is slidably connected in the limiting sleeve frame, the inner wall of the limiting sleeve frame is connected with the spring five, and the other end of the ratchet bar extends outside the limiting sleeve frame and is in meshing connection with the ratchet.

[0012] Preferably, the support plate is further connected with a positioning sleeve frame, the positioning sleeve frame is slidably connected with a ratchet block, one end of the ratchet block extends outside the positioning sleeve frame and is in meshing connection with the ratchet, and the other end of the ratchet block in the positioning sleeve frame is connected with the spring six and the inner wall of the positioning sleeve frame.

[0013] Preferably, the discharging assembly comprises a poking block, a discharging notch, a vertical seat, a rotating shaft, a gear, a baffle, a slide rod seat three, a slide seat, a rack, and a frame, the two poking blocks are respectively connected on the sides of the two guide blocks two away from each other, the discharging notches are formed on the left and right sides of the rack, the vertical seat is connected to the lower inner wall of the discharging notch, the rotating shaft is rotatably installed on the upper end of the vertical seat, the gear is installed on one end of the rotating shaft, the baffle is connected to the outer side of the rotating shaft, the slide rod seat three is connected to the vertical seat, the slide seat is slidably sleeved on the outer side of the slide rod seat three, the slide seat and the upper end of the slide rod seat three are connected with the spring seven sleeved on the outer side of the slide rod seat three, the rack is connected to the slide seat and is in meshing connection with the gear on the respective side, the left and right ends of the frame are respectively connected to the upper ends of the left and right racks on the same side, and the frame is above the poking block, and the upper end surface of the poking block is in abutment with the lower inner wall of the frame.

[0014] A circuit board anti-soldering automatic screen printing process comprises the following steps: Step one: place the circuit board on the processing table plate near the edge of the rack, then control the guide rail one to drive the slide frame below the processing table plate to slide until directly below the ink scraping module; Step two: control the driving assembly to drive the two slide plate frames to move closer to each other, in the process, the triangular frame connected to the lower end of the clamping plate will be separated from the abutment top seat and will move up from the slide to above the processing table plate, the clamping plates on the front and rear sides will slide in the respective slides and move closer to each other, so as to centrally clamp and place the circuit board placed on the processing table plate, and finally reset the clamping plate. Step three: control the driving assembly to drive the supporting plate to move upwards, and drive the tray to lift the circuit board placed on the processing platform to above the processing platform, and at the same time, make the steering assembly run to drive the cylinder and the tray to rotate, then perform the operation in step two again to centrally place the circuit board on the other two sides, and realize the central placement of the circuit board in front and back and left and right; Step four: control guide block two to slide downwards to make the ink scraping module move downwards, and then perform screen printing processing on the centrally placed circuit board, and then the ink scraping module and the tray lift the processed circuit board to above the processing platform, and through the discharging assembly, the circuit board is discharged; Step five: set the sliding frame and the processing platform as two groups, so that when one processing platform is directly below the ink scraping module to perform steps two to four, the other processing platform is on one side of the rack to perform step one.

[0015] The beneficial effects of the present application are: 1、The technical scheme of the present application drives two groups of sliding frames to slide to one side of the rack through guide rail one, so that one sliding frame slides to one side of the rack, and then the circuit board is placed on the processing platform thereof, and then the sliding frame supporting the circuit board is controlled to slide to below the ink scraping module again, and then the other sliding frame slides to the other side of the rack, so that when the circuit board on the sliding frame below the ink scraping module is processed, the feeding of the circuit board on the other sliding frame can be performed at the same time; 2、The technical scheme of the present application drives the two sliding plate frames to move close to each other through the driving assembly, so that the clamps connected to one end of the two sliding plate frames can move close to each other, and then the triangular frame connected to the lower side of the clamp will gradually be separated from the abutting top seat, so that the clamp can slide in the slide while being lifted from the slide to above the processing platform, so that when the two sliding plate frames drive the two clamps to move close to each other, the extension end of the clamp above the processing platform can centrally clamp the circuit board placed on the processing platform in one direction, and then the driving assembly is controlled to move the two clamps away from each other and reset, and then the supporting plate is lifted upwards through the driving assembly, and the circuit board already centrally placed on one side is lifted to above the processing platform through the cylinder and the tray, and at the same time, the steering assembly is operated to drive the cylinder, the tray and the circuit board to rotate 90°, and then the above operation is performed, so that the other side of the circuit board rotated 90° can be centrally clamped in front and back by the clamp, so that the circuit board is centrally placed in front, back, left and right, so that the ink scraping module can be accurately aligned upwards and downwards, the processing efficiency is improved, and the automatic central clamping has universality for circuit boards of different sizes while avoiding manual operation, improving efficiency and reducing errors; 3、The technical scheme of the present application realizes automatic feeding, discharging and center clamping by first controlling the scraping module to move upward after the circuit board on the slide frame below the scraping module and the processing table plate is processed, then driving the tray to move upward again by the driving assembly to drive the processed circuit board on the tray to move to the top of the processing table plate and rotate 90° to the same direction as feeding, and then controlling the slide frame to move to the side of the rack, and the circuit board lifted to the top of the processing table plate is discharged by the discharging assembly in the process, thereby further improving the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the present application without a rack and guide rail 1; Figure 3 is a structural schematic diagram of the related structure on the slide frame and the scraping module; Figure 4 is a schematic diagram of the related structure on the slide frame; Figure 5 is a bottom view of the structure on the lower side of the processing table plate; Figure 6 is a schematic diagram of the structure on the slide frame and the driving assembly; Figure 7 is a bottom view of the structure on the slide frame and the driving assembly; Figure 8 is a schematic diagram of the related structure on the tray and the driving assembly; Figure 9 is a side view of the structure on the slide frame and the driving assembly; Figure 10 is a structural schematic diagram of the discharging assembly.

[0017] BRIEF DESCRIPTION OF DRAWINGS: 1. Frame; 2. Guide rail one; 3. Sliding frame; 4. Guide bar; 5. Processing table; 6. Guide rail two; 7. Guide block two; 8. Actuating block; 9. Slide rail; 10. Round hole; 11. Guide rod one; 12. Slide frame; 13. Spring one; 14. Slide rod seat one; 15. Clamping plate; 16. Spring two; 17. Triangular frame; 18. Abutting top seat; 19. Slide rod seat two; 20. Sleeve seat; 21. Telescopic component one; 22. Connecting plate; 23. Turning plate; 24. Guide rod two; 25. Support plate; 26. Spring three; 27. Round hole 28. Cylinder; 29. ​​Pallet; 30. Worm gear; 31. Worm; 32. Ratchet; 33. Guide rod three; 34. Slide; 35. Spring four; 36. Limiting sleeve; 37. Ratchet; 38. Spring five; 39. Positioning sleeve; 40. Ratchet block; 41. Discharge slot; 42. Vertical seat; 43. Rotating shaft; 44. Gear; 45. Baffle; 46. Slide rod seat three; 47. Slide; 48. Rack; 49. Spring seven; 50. Frame; 51. Equipment frame; 52. Wire mesh frame; 53. Scraper. Detailed Implementation

[0018] The following will be combined with the appendix Figure 1 To be continued Figure 10 The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1:

[0020] like Figures 1-10 As shown, the present invention discloses an automatic screen printing machine for solder resisting of circuit boards, including a frame 1. The bottom of the frame 1 is equipped with a front-to-back parallel guide rail 2, and a sliding frame 3 is slidably arranged between the front and back guide rails 2. A processing table 5 is installed on the upper end of the sliding frame 3. A second guide rail 6 is installed on the upper ends of both the front and back sides of the frame 1. A second guide block 7 is slidably arranged in the second guide rail 6. A scraper module is installed on the second guide block 7. Multiple slide rails 9 are opened on the upper end surface of the processing table 5, and a round hole 10 is also opened in the center of the upper end surface of the processing table 5. A sliding plate frame 12 is symmetrically slidably arranged on the front and back sides below the processing table 5. A clamping plate 15 is slidably connected to one side of the two sliding plate frames 12, and the clamping plate 15 slides through the slide rails 9. A triangular frame 17 is also connected to the clamping plate 15. The lower end of the processing table 5 is connected to a top seat 18 that slides and abuts against the inclined surface of the triangular frame 17. A support plate 25 is slidably provided on the lower end surface of the processing table 5, and a cylinder 27 is rotatably fitted inside the support plate 25. The upper end of the cylinder 27 is connected to a tray 28 located in the circular hole 10. A drive assembly is provided on the sliding frame 3. The drive assembly is used to drive the sliding frame 12 to slide or drive the support plate 25 to slide upward. A steering assembly is provided on the support plate 25. The steering assembly is used to drive the circuit board supported on the tray 28 to turn when the support plate 25 moves upward. A feeding assembly is also provided on the frame 1. The feeding assembly is used to feed the circuit board after the screen printing of the circuit board is completed.

[0021] Both guide rail 12 and guide rail 26 adopt existing mature linear electric guide rails.

[0022] The scraper module includes a device frame 51, a screen frame 52, and a scraper 53. The front and rear ends of the device frame 51 are respectively connected to guide blocks 7 that slide within the guide rails 2 on the front and rear sides, which are close to each other at one end. The screen frame 52 is installed below the device frame 51. There are two scrapers 53, which are slidably installed within the device frame 51 and slide against the upper end of the screen frame 52. Guide strips 4 are connected to both sides of the sliding frame 3, and the guide strips 4 are slidably connected within the guide rails 2. The scraper module uses existing mature equipment.

[0023] The front and rear sides of the lower end of the processing table 5 are connected to guide rods 11 parallel to the slide rails 9. The guide rods 11 are located on the left and right sides of the slide rails 9, which are far apart from each other. The two ends of the guide rods 11 are connected to the lower end of the processing table 5. The two ends of the slide frame 12 are slidably sleeved on the outer side of the guide rods 11 on both sides. The front and rear slide frames 12 are close to each other and connected to the end of the guide rods 11 on their respective sides. Springs 13 are sleeved on the outside of the guide rods 11.

[0024] The sliding sleeves on both sides of the skateboard frame 12 on the guide rod 11 can stabilize the sliding of the skateboard frame 12. At the same time, the spring 13 can allow the two sides of the skateboard frame 12 to slide away from each other to the maximum distance without external force, until they are limited to the ends that are far away from each other from the guide rod 11.

[0025] Each of the processing table plates 5 is connected to a slide rod seat 14 directly below the slide rail 9 at one end of each other. The lower end of the clamping plate 15 is slidably sleeved on the outside of the slide rod seat 14, and a spring 16 sleeved on the outside of the slide rod seat 14 is connected between the lower end of the clamping plate 15 and the lower end of the slide rod seat 14.

[0026] The clamping plate 15 can slide upwards under the action of the spring two 16 to the slide rail seat one 14 until extending to above the processing table plate 5 through the slide 9, and when the clamping plate 15 and the triangular frame 17 connected with the lower end are driven to slide by the slide plate frame 12 and the triangular frame 17 abuts against the abutting top seat 18, the abutting top seat 18 will abut against the inclined surface of the triangular frame 17, and the abutting triangular frame 17 pulls the clamping plate 15 to slide downwards until the clamping plate 15 slides into the slide 9 or below the processing table plate 5, so as to avoid affecting the circuit board when the circuit board is placed on the processing table plate 5, and the circuit board cannot be laid flat on the upper end surface of the processing table plate 5.

[0027] The processing table plate 5 is connected with the guide rod two 24 on the left and right sides of the lower end surface, the slide plate 25 is slidably sleeved on the outer side of the guide rod two 24, and the spring three 26 is connected between the slide plate 25 and the lower end surface of the processing table plate 5 and is sleeved on the outer side of the guide rod two 24.

[0028] The slide sleeve of the slide plate 25 and the guide rod two 24 can make the slide plate 25 more stable when sliding up and down, and the spring three 26 can make the slide plate 25 move downwards to the lowermost end of the guide rod two 24 under the action of the elastic force of the spring three 26 and the gravity of the slide plate 25 without external force.

[0029] Embodiment two:

[0030] As shown in Figures 1-10 The present application discloses a kind of circuit board anti-soldering automatic screen printing machine, compared with embodiment one, the structure of the drive assembly is disclosed in the present embodiment.

[0031] The drive assembly includes slide rail seat two 19, sleeve seat 20, telescopic part one 21, connecting plate 22, slide rail seat two 19 is connected at the lower end surface of each slide plate frame 12, sleeve seat 20 is slidably sleeved on the outer side of the slide rail seat two 19, telescopic part one 21 is installed in the lower inner wall of slide frame 3, connecting plate 22 is connected at the output end of telescopic part one 21, and the lower end surface of connecting plate 22 is abutted with the lower end surface of slide plate 25.

[0032] So that when the two sides telescopic part one 21 are contracted, connecting plate 22 can be driven to move downwards, at this time, slide plate 25 is not acted on, but the two sides rotating plate 23 are pulled to drive the two sides sleeve seat 20 to slide towards each other, until the two sides sleeve seat 20 are close to each other to the slide rail seat two 19 on the two sides slide plate frame 12, which can drive the two sides slide plate frame 12 to move towards each other, and then drive the front and rear clamping plate 15 to move towards each other, and the front and rear clamping plate 15 can move upwards to above the processing table plate 5 after the triangular frame 17 and the abutting top seat 18 cancel abutment when moving towards each other, to facilitate the circuit board placed on the processing table plate 5 to be centered clamped and placed.

[0033] When the telescopic member 21 is extended, the two side slide plate frames 12 will be away from each other under the action of the spring 13, and the triangular frame 17 will be in abutment with the abutment top seat 18, thereby driving the clamping plate 15 to move downward into the slide 9 or below the processing table plate 5, and then with the continuous upward movement of the connecting plate 22, the lower end of the supporting plate 25 will be in abutment, thereby driving the supporting plate 25, the cylinder 27 and the tray 28 to move upward, and then the tray 28 will lift the circuit board placed on the processing table plate 5 to above the processing table plate 5, and in the process, the rotating plate 23 will drive the two side sleeve seats 20 to slide on the respective slide rod seats 19.

[0034] Embodiment three:

[0035] As shown in Figures 1-10 , the present application discloses a kind of circuit board anti-soldering automatic screen printing machine, compared with embodiment two, this embodiment discloses the structure of steering assembly.

[0036] Steering assembly includes worm gear 29, worm 30, ratchet 31, guide rod three 32, slide 33, limit sleeve frame 35, rack 36, worm gear 29 is sleeved on the outer side of cylinder 27, worm 30 is rotatably installed on the upper end of supporting plate 25, and is located at one side of worm gear 29, and is meshed with worm gear 29, ratchet 31 is connected at both ends of worm 30, guide rod three 32 is connected at the lower end surface of supporting plate 25, slide 33 is provided with two and is respectively slidably sleeved on the outer side of two side guide rod three 32, spring four 34 is connected between the lower end of slide 33 and the lower end surface of supporting plate 25 and is sleeved on the outer side of guide rod three 32, limit sleeve frame 35 is connected on slide 33, rack 36 is limitingly slidably connected in limit sleeve frame 35, and spring five 37 is connected with the inner wall of limit sleeve frame 35, and the other end extends on the outer side of limit sleeve frame 35 and is meshed with ratchet 31.

[0037] So that when supporting plate 25 is driven by connecting plate 22 to move the circuit board upward to above processing table plate 5, slide 33 will be in abutment with the lower end surface of processing table plate 5, and slide on guide rod three 32 and move downward, and compress spring four 34, thereby driving limit sleeve frame 35 and rack 36 to slide downward, so that rack 36 drives worm 30 to rotate through the meshing with ratchet 31, and drives cylinder 27, tray 28 and the circuit board lifted by tray 28 to rotate 90° synchronously through the meshing of worm 30 and worm gear 29, then control telescopic member 21 to contract, so that slide 33 falls and resets, but when falling, rack 36 will be squeezed into limit sleeve frame 35 and compress spring five 37 due to the limitation of ratchet 31, which ensures that the rotation angle will not reset following the reset after rotating 90° of tray 28 and circuit board.

[0038] The positioning sleeve frame 38 is further connected to the supporting plate 25, and the ratchet block 39 is slidably connected in the positioning sleeve frame 38, and one end of the ratchet block 39 extends outside the positioning sleeve frame 38 and is engaged with the ratchet wheel 31, and the other end of the ratchet block 39 in the positioning sleeve frame 38 is connected with the spring 40 on the inner wall of the positioning sleeve frame 38.

[0039] The engagement of the ratchet block 39 and the ratchet wheel 31 can limit the ratchet wheel 31 when the ratchet wheel 31 is driven to rotate on the ratchet strip 36, but can lock the ratchet wheel 31 when the ratchet strip 36 is moved downward, further ensuring the stability of the ratchet wheel 31 and the worm 30 when the sliding frame 33 is reset, and ensuring the stability of the circuit board after rotating 90°.

[0040] Therefore, during the actual processing, the two groups of sliding frames 3 are driven by the guide rail one 2 to slide to one side of the rack 1, so that one sliding frame 3 slides to one side of the rack 1, and then the circuit board is placed on the processing table plate 5, and then the guide rail one 2 is controlled again to drive the sliding frame 3 supporting the circuit board to slide to the lower side of the ink scraping module, and then the other sliding frame 3 slides to the other side of the rack 1, so that the circuit board on the sliding frame 3 directly below the ink scraping module can be processed, and the feeding of the circuit board on the other sliding frame 3 can be simultaneously performed at the same time. When the two sliding plate frames 12 are driven to move close to each other, the clamping plates 15 slidably connected to one end of the two sliding plate frames 12 can move close to each other, and the triangular frames 17 connected to the lower sides of the clamping plates 15 can gradually be separated from the abutting top seats 18, so that the clamping plates 15 can slide in the slide ways 9 and be lifted from the slide ways 9 to the upper side of the processing table plate 5, so that when the two sliding plate frames 12 drive the two clamping plates 15 to move close to each other, the clamping plates 15 can extend to the upper side of the processing table plate 5 to centrally clamp the circuit board placed on the processing table plate 5 in one direction, and then the driving assembly is controlled to drive the two clamping plates 15 to move away from each other and reset, and then the driving assembly drives the supporting plate 25 to move upward, and the cylinder 27 and the supporting plate 28 drive the circuit board that has been centrally clamped on one side to be lifted to the upper side of the processing table plate 5, and the turning assembly is driven to rotate the cylinder 27, the supporting plate 28 and the circuit board by 90°, and then the above operation is performed, so that the clamping plates 15 can centrally clamp the circuit board on the other side after being rotated by 90°, so that the circuit board is centrally placed on the four sides, so that the ink scraping module can be accurately aligned upward and downward, the processing efficiency is improved, and the automatic central clamping can be used for different sizes of circuit boards.

[0041] Embodiment Four

[0042] As shown in Figures 1-10 The present application discloses a kind of circuit board anti-soldering automatic screen printing machine, compared with embodiment three, the structure of the unloading assembly is disclosed in the present embodiment.

[0043] The blanking assembly comprises two poking blocks 8, two blanking notches 41, two vertical seats 42, two rotating shafts 43, two gear wheels 44, two baffle plates 45, three sliding rod seats 46, a sliding seat 47, two gear racks 48 and a frame 50, the two poking blocks 8 are arranged on the two sides of the two guide blocks 7 respectively, the two blanking notches 41 are arranged on the two sides of the rack 1, the vertical seat 42 is connected to the inner wall below the blanking notch 41, the rotating shaft 43 is rotatably arranged on the upper end of the vertical seat 42, the gear wheel 44 is arranged on one end of the rotating shaft 43, the baffle plate 45 is connected to the outer side of the rotating shaft 43, the sliding rod seat 46 is connected to the vertical seat 42, the sliding seat 47 is slidably arranged on the outer side of the sliding rod seat 46, the spring 49 is arranged on the outer side of the sliding rod seat 46 and connected between the sliding seat 47 and the upper end of the sliding rod seat 46, the gear rack 48 is connected to the sliding seat 47 and engaged with the gear wheel 44 on the same side, the frame 50 is connected to the upper end of the gear rack 48 on the same side, and the frame 50 is arranged above the poking block 8, and the upper end surface of the poking block 8 is in abutment with the lower inner wall of the frame 50.

[0044] After the circuit board on the sliding frame 3 and the processing platform 5 below the ink scraping module is processed, the ink scraping module is first controlled to move upward, in the process, the guide block 7 drives the poking block 8 connected thereto to move upward, so as to push the frame 50 upward and pull the gear racks 48 and the sliding seat 47 on the two sides upward, and at the same time, the spring 49 is compressed, and then the gear rack 48 drives the rotating shaft 43 and the baffle plate 45 to rotate 90° through the engagement of the gear rack 48 and the gear wheel 44, so that the originally vertical baffle plate 45 is rotated to a horizontal state parallel to the processing platform 5, then the tray 28 is driven by the driving assembly to move upward again, so as to drive the processed circuit board thereon to move to above the processing platform 5 again, and rotate 90° in the same direction as when feeding, then the sliding frame 3 is controlled to move to the side edge of the rack 1, in the process, the processed circuit board raised above the processing platform 5 will abut against the baffle plate 45 and fall off from between the two processing platforms 5, so that the conveying belt can be arranged in the two blanking notches 41 to receive and convey the blanked processed circuit board, and the feeding can also be directly conveyed to the processing platform 5 through the conveying belt, so as to realize automatic feeding and center clamping, and further improve the processing efficiency.

[0045] Embodiment five

[0046] As shown in Figures 1-10 Figures 1-10 The present application discloses a kind of circuit board anti-soldering automatic screen printing processes, comprising the following steps: Step one: place the circuit board on the processing platform 5 near the edge of the rack 1, then control the guide rail 2 to drive the sliding frame 3 below the processing platform 5 to slide until it is directly below the ink scraping module; Step two: control the driving assembly to drive the two side slide plate frames 12 to move close to each other, in the process, the triangular frame 17 connected to the lower end of the clamping plate 15 will be separated from the abutting top seat 18, and will move up from the slide 9 to above the processing table plate 5, the front and rear clamping plates 15 are still sliding in the respective slides 9 and moving close to each other, realizing the front and rear center clamping and placing of the circuit board placed on the processing table plate 5, and finally resetting the clamping plate 15; Step three: control the driving assembly to drive the supporting plate 25 to move up, and drive the tray 28 to lift the circuit board placed on the processing table plate 5 to above the processing table plate 5, at the same time, make the steering assembly run, drive the cylinder 27 and the tray 28 to rotate 90°, and then perform the operation in step two again, to place the other two sides of the circuit board in the center, realizing the centering of the circuit board in front, back, left and right; Step four: control the guide rail two 6 to drive the guide block two 7 to slide down, so that the ink scraping module moves down, and then the circuit board placed in the center is screen printed, then the ink scraping module and the tray 28 lift the processed circuit board to above the processing table plate 5, and through the discharging assembly, the circuit board is discharged; Step five: set the slide frame 3 and the processing table plate 5 as two groups, so that when one processing table plate 5 is below the ink scraping module to perform steps two to four, the other processing table plate 5 is on one side of the rack 1 to perform step one.

[0047] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of explanation and do not constitute any limitation on the present application.

Claims

1. An automatic screen printing machine for solder resisting circuit boards, comprising a frame (1), a first guide rail (2) with parallel front and rear sides installed at the bottom of the frame (1), and a sliding frame (3) slidably arranged between the front and rear guide rails (2), a processing table (5) installed at the upper end of the sliding frame (3), a second guide rail (6) installed at the upper ends of both the front and rear sides of the frame (1), a second guide block (7) slidably arranged inside the second guide rail (6), and a scraper module installed on the second guide block (7), characterized in that, The upper end face of the processing platform (5) is provided with a plurality of slides (9), and the center of the upper end face of the processing platform (5) is also provided with a circular hole (10), the lower side of the processing platform (5) is symmetrically provided with a sliding plate frame (12), and the two sides of the sliding plate frame (12) are slidably connected with a clamping plate (15) on the side close to each other, and the clamping plate (15) penetrates and slides in the slide (9), and the clamping plate (15) is further connected with a triangular frame (17). The lower end of the processing platform (5) is connected with a triangular frame (17) inclined surface sliding fit abutting top seat (18), the lower end of the processing platform (5) is slidably provided with a supporting plate (25), and the supporting plate (25) is rotatably sleeved with a cylinder (27), the upper end of the cylinder (27) is connected with a tray (28) in the circular hole (10), the sliding frame (3) is provided with a driving assembly, the driving assembly is used for driving the sliding plate frame (12) to slide or driving the supporting plate (25) to slide upward, the supporting plate (25) is provided with a steering assembly, the steering assembly is used for steering the circuit board supported on the tray (28) when the supporting plate (25) moves upward, and the rack (1) is further provided with a blanking assembly, the blanking assembly is used for blanking the circuit board after screen printing of the circuit board is completed.

2. A circuit board solder resist automatic screen printer according to claim 1, wherein The ink scraping module comprises a device frame (51), a screen frame (52) and a scraper (53), the front and rear ends of the device frame (51) are respectively connected to the mutually close ends of the guide blocks two (7) slidably connected in the front and rear guide rails two (6), the screen frame (52) is installed below the device frame (51), the scraper (53) is provided with two and is slidably arranged in the device frame (51) and slidably abuts with the upper end of the screen frame (52), and the two sides of the sliding frame (3) are connected with guide strips (4) which are slidably connected in the guide rails one (2).

3. The automatic screen printer for solder resist of a circuit board according to claim 1, wherein The lower end face of the processing platform (5) is connected with guide rods one (11) parallel to the slides (9), and the guide rods one (11) are located on the sides away from each other of the left and right slides (9), and the two ends of the guide rods one (11) are connected to the lower end face of the processing platform (5), the two ends of the sliding plate frame (12) are slidably sleeved on the outer sides of the guide rods one (11) on the two sides, and the mutually close ends of the sliding plate frames (12) on the front and rear sides are connected with the springs one (13) sleeved on the outer sides of the guide rods one (11).

4. The circuit board solder resist automatic screen printer according to claim 1, wherein The mutually close ends of the processing platform (5) are connected with slide rod seats one (14) corresponding to the positions directly below the slides (9), the lower end of the clamping plate (15) is slidably sleeved on the outer side of the slide rod seat one (14), and the lower end of the clamping plate (15) and the lower end of the slide rod seat one (14) are connected with the springs two (16) sleeved on the outer side of the slide rod seat one (14).

5. The circuit board solder resist automatic screen printer according to claim 1, wherein The lower end face of the processing platform (5) is connected with guide rods two (24) on the left and right sides, the two sides of the supporting plate (25) are slidably sleeved on the outer sides of the guide rods two (24), and the lower end face of the supporting plate (25) and the processing platform (5) are connected with the springs three (26) sleeved on the outer sides of the guide rods two (24).

6. The circuit board solder resist automatic screen printer according to claim 1, wherein The driving assembly comprises a slide rod seat two (19), a sleeve seat (20), an extension piece one (21), a connecting plate (22), the slide rod seat two (19) is connected to the lower end surface of each slide plate frame (12), the sleeve seat (20) is slidably sleeved on the outer side of the slide rod seat two (19), the extension piece one (21) is installed on the lower inner wall of the slide frame (3), the connecting plate (22) is connected to the output end of the extension piece one (21), and the both ends of the connecting plate (22) are rotatably connected with the sleeve seat (20) on the two sides.

7. The circuit board solder resist automatic screen printer according to claim 1, wherein The steering assembly comprises a worm wheel (29), a worm (30), a ratchet wheel (31), a guide rod three (32), a sliding frame (33), a limiting sleeve frame (35), and a ratchet bar (36), the worm wheel (29) is sleeved on the outer side of the cylinder (27), the worm (30) is rotatably installed on the upper end of the supporting plate (25) and is located on one side of the worm wheel (29) and is in meshing connection with the worm wheel (29), the ratchet wheel (31) is connected to the both ends of the worm (30), the guide rod three (32) is connected to the lower end surface of the supporting plate (25) on the two sides, the sliding frame (33) is provided with two and is slidably sleeved on the outer sides of the guide rod three (32) on the two sides, the lower end of the sliding frame (33) and the lower end surface of the supporting plate (25) are connected with the spring four (34) which is sleeved on the outer side of the guide rod three (32), the limiting sleeve frame (35) is connected to the sliding frame (33), one end of the ratchet bar (36) is limitingly and slidably connected in the limiting sleeve frame (35) and is connected with the inner wall of the limiting sleeve frame (35) with the spring five (37), and the other end extends outside the limiting sleeve frame (35) and is in meshing connection with the ratchet wheel (31).

8. The circuit board solder resist automatic screen printer according to claim 7, wherein The supporting plate (25) is further connected with a positioning sleeve frame (38), the positioning sleeve frame (38) is slidably connected with a ratchet block (39), one end of the ratchet block (39) extends outside the positioning sleeve frame (38) and is in meshing connection with the ratchet wheel (31), and the other end of the ratchet block (39) in the positioning sleeve frame (38) is connected with the inner wall of the positioning sleeve frame (38) with the spring six (40).

9. The circuit board solder resist automatic screen printer according to claim 1, wherein The blanking assembly comprises poking blocks (8), blanking notches (41), vertical seats (42), rotating shafts (43), gears (44), baffles (45), slide rod seats three (46), sliding seats (47), racks (48) and frames (50), the two poking blocks (8) are arranged on the sides of the two guide blocks two (7) respectively, the blanking notches (41) are arranged on the left and right sides of the rack (1), the vertical seats (42) are connected to the inner walls of the blanking notches (41), the rotating shafts (43) are rotatably arranged on the upper ends of the vertical seats (42), the gears (44) are arranged on one end of the rotating shaft (43), the baffle (45) is connected to the outer side of the rotating shaft (43), the slide rod seat three (46) is connected to the vertical seat (42), the sliding seat (47) is slidably arranged on the outer side of the slide rod seat three (46), the spring seven (49) is arranged on the outer side of the slide rod seat three (46) and connected between the sliding seat (47) and the upper end of the slide rod seat three (46), the rack (48) is connected to the sliding seat (47) and engaged with the gear (44) on the same side, the left and right ends of the frame (50) are connected to the upper ends of the left and right racks (48) on the same side, and the frame (50) is above the poking block (8), and the upper end surface of the poking block (8) is in abutment with the lower inner wall of the frame (50).

10. A circuit board solder mask automatic screen printing process based on the circuit board solder mask automatic screen printer according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: Step one: place the circuit board on the processing table plate (5) near the edge of the rack (1), then control the guide rail one (2) to drive the slide frame (3) below the processing table plate (5) to slide until directly below the ink scraping module; Step two: control the driving assembly to drive the two slide plate frames (12) to move closer to each other, in the process, the triangular frame (17) connected to the lower end of the clamping plate (15) will be separated from the abutting top seat (18) and moved up from the slide (9) to above the processing table plate (5), the front and rear clamping plates (15) are also sliding in the respective slide (9) and moving closer to each other, so as to centrally clamping and placing the circuit board placed on the processing table plate (5), and finally resetting the clamping plate (15); Step three: control the driving assembly to drive the supporting plate (25) to move up and drive the tray (28) to lift the circuit board placed on the processing table plate (5) to above the processing table plate (5), at the same time, the steering assembly is operated to drive the cylinder (27) and the tray (28) to rotate 90°, then the operation in step two is performed again to centrally place the other two sides of the circuit board, so that the circuit board is centrally placed in front, back, left and right; Step four: control the guide rail two (6) to drive the guide block two (7) to slide down, so that the ink scraping module moves down, and then the centrally placed circuit board is screen printed, then the ink scraping module and the tray (28) lift the processed circuit board to above the processing table plate (5), and the circuit board is discharged through the blanking assembly. Step five: set two groups of slide frame (3) and processing platform (5), so that when one processing platform (5) is directly below the ink scraping module to carry out steps two to four, the other processing platform (5) is on one side of the rack (1) to carry out step one.

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