Solder paste printing device suitable for SMT patch production

Abstract

The utility model relates to the technical field of SMT patch processing, in particular to a solder paste printing device suitable for SMT patch production. Comprising a main shell, an auxiliary shell and a numerical control screen, a scraping and printing assembly and an adjusting and conveying assembly which facilitate PCB machining are arranged in the main shell, an auxiliary conveying assembly which is matched with the adjusting and conveying assembly to convey PCBs is arranged in the auxiliary shell, and the scraping and printing assembly comprises a scraper and a steel mesh; a first electric air cylinder is arranged at the top of the scraper, a U-shaped moving block is arranged on one side of the first electric air cylinder, and a first electric sliding rail is arranged at the bottom end of the U-shaped moving block. According to the solder paste printing device suitable for SMT production, through the design of the adjusting conveying assembly, synchronous operation between the two conveying belts is guaranteed while the distance between the two conveying belts is adjusted, and the phenomenon that PCBs are stuck or stop positioning points are inaccurate in the conveying process is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of SMT patch processing, in particular to a solder paste printing device suitable for SMT patch production. Background Art

[0002] SMT patch refers to the abbreviation of a series of process flows based on PCB. The solder paste printing device is the first process in the production of SMT patches. Modern solder paste printing devices are generally composed of mechanisms such as plate loading, solder paste adding, stamping, and circuit board feeding. Its working principle is: first fix the circuit board to be printed on the printing positioning table, and then the left and right scrapers of the printer print the solder paste or red glue through the steel mesh on the corresponding pads. For PCB boards with uniform leakage, they are input into the placement machine through the transmission table for automatic placement.

[0003] When SMT patches are processed, they are mostly transported to the inside of the solder paste printing device by synchronous belts. Due to the diversity of PCB types, the sizes of different PCB boards are mostly different, which leads to the need for the staff to adjust the distance between the two synchronous belts so that they can transport PCB boards of different sizes. In order to simultaneously meet the adjustment of the synchronous belt spacing and the synchronous rotation between the two synchronous belts, the solder paste printing device in the prior art mostly controls the two synchronous belts in parallel with the same specification of drive motors to meet the needs of actual production of SMT patches. However, in the actual use process, we found that although the same specification of drive motors are connected in parallel to control the two synchronous belts, due to the processing deviation in the production of the drive motors, even the same model of drive motors have a certain degree of difference in the actual use process, which will cause the two drive motors to be unable to be completely synchronized, and the same specification of drive motors will still have different wear conditions of their internal parts during actual work. These small differences will also affect the synchronous operation of the two drive motors, so that the PCB board is stuck or the stop positioning point is inaccurate during the transportation process and the steel mesh cannot be completely fitted, and the actual use effect of the device is poor.

[0004] To this end, we design a solder paste printing device suitable for SMT patch production to provide another technical solution to the above technical problems. Utility Model Content

[0005] Based on this, it is necessary to provide a solder paste printing device suitable for SMT patch production, which is convenient for adjusting the distance between the two conveyor belts and ensuring the synchronous operation of the two conveyor belts, in order to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A solder paste printing device suitable for SMT patch production, comprising a main shell, an auxiliary shell and a numerical control screen, wherein the numerical control screen is fixedly mounted on the outside of the main shell, and the interior of the main shell is provided with a scraping assembly and an adjustment and conveying assembly for facilitating PCB board processing, the auxiliary shell is arranged on one side of the main shell and is provided with an auxiliary conveying assembly for cooperating with the adjustment and conveying assembly to transport the PCB board, the scraping assembly comprises a scraper and a steel mesh, the scraper is arranged on the top of the steel mesh, the top of the scraper is fixedly connected to a first electric cylinder for adjusting the radial position of the scraper, one side of the first electric cylinder is fixedly connected to a U-shaped moving block, the bottom end of the U-shaped moving block is fixedly connected to a first electric slide rail, the first electric slide rail is fixedly arranged inside the main shell, and the interior of the main shell is provided with a steel mesh placement assembly for facilitating the fixed placement of the steel mesh.

[0008] Preferably, the adjustable conveying assembly is fixedly arranged below the steel mesh, and the adjustable conveying assembly includes a first mounting plate symmetrically arranged inside the main shell, a rotating roller 1 is symmetrically arranged on the first mounting plate, one end of the rotating roller 1 is fixedly connected to one of the first mounting plates, and the other end of the rotating roller 1 is movably inserted into the other first mounting plate, and the fixedly connected end of the rotating roller 1 passes through the first mounting plate and is connected to a driving motor 1, a plurality of limiting guide strips are fixedly arranged on the outside of one side of the rotating roller 1 through which it is inserted, and an insertion hole matching the rotating roller 1 and the limiting guide strip is arranged on the first mounting plate, and limiting rings 1 for limiting the moving position of the rotating roller 1 are arranged at both ends of the limiting guide strip;

[0009] A section of the rotating roller located in the first mounting plate is fixedly provided with a pulley, an outer sleeve of the pulley is provided with a synchronous belt, a turntable matching the pulley is fixedly connected to the first mounting plate, the turntable is divided into an inner disk and an outer disk, the inner disk is rotatably connected to the outer disk, the outer disk is fixedly arranged in the first mounting plate, and the pulley is fixedly connected to the inner disk.

[0010] Preferably, the adjusting conveying assembly further comprises a driving motor 2 and an adjusting screw 1, the output end of the driving motor 2 is fixedly connected to the adjusting screw 1, the main housing is provided with a strip mounting groove for facilitating the installation of the driving motor 2 and the adjusting screw 1, one end of the adjusting screw 1 away from the driving motor 2 is rotatably connected to the side wall of the strip mounting groove, the driving motor 2 is fixedly arranged in the strip mounting groove, a limiting guide block 1 is fixedly arranged at the bottom ends of the two first mounting plates, a strip slide matching the limiting guide block 1 is arranged inside the main housing, and the limiting guide block 1 is slidably clamped in the strip slide;

[0011] One end of one of the first mounting plates away from the limit guide block is threadedly connected to the adjusting screw 1, and the side of the adjusting screw 1 away from the driving motor 2 is threadedly connected to the movable mounting block, and the other end of the first mounting plate close to the movable mounting block is fixedly provided with a limit guide block 2, and the first mounting plate is clamped on the movable mounting block through the limit guide block 2, wherein one side of the first mounting plate threadedly connected to the adjusting screw 1 is provided with a driving motor 3, the output end of the driving motor 3 passes through the first mounting plate and is connected with an adjusting screw 2, the end of the adjusting screw 2 away from the driving motor 3 is rotatably connected to the movable mounting block, the end of the adjusting screw 2 located in the movable mounting block is provided with an adjusting thread, and the other first mounting plate is threadedly connected to the adjusting screw 2.

[0012] Preferably, a hydraulic cylinder for lifting the PCB board transported on the synchronous belt is fixedly provided inside the main shell, the output end of the hydraulic cylinder is fixedly connected to a support plate, and the first mounting plate is provided with a notch that cooperates with the support plate to facilitate radial movement of the PCB board.

[0013] Preferably, one side of the main shell is provided with a strip conveying port for facilitating the entry of the PCB board, a receiving roller for receiving the PCB board is rotatably connected in the strip conveying port, and a limiting guide plate for limiting the transport position of the PCB board is symmetrically provided on the receiving roller, and the limiting guide plate is slidably sleeved on the receiving roller, and one end of the limiting guide plate is fixedly connected to the outer disk.

[0014] Preferably, the auxiliary conveying assembly includes a plurality of second electric slide rails symmetrically arranged inside the auxiliary shell, a sliding block of the second electric slide rail is rotatably connected to a rotating roller 2, a conveyor belt is sleeved on the outside of the rotating roller 2, a plurality of limit rings 2 are provided on the rotating roller 2 for limiting the conveying position of the PCB board on the conveyor belt, a mounting plate is fixedly provided on the sliding block of one of the second electric slide rails, a driving motor 4 for driving the conveyor belt is fixedly provided on the mounting plate, and an output end of the driving motor 4 is fixedly connected to one of the rotating rollers 2.

[0015] Preferably, the steel mesh placement assembly includes a second mounting plate symmetrically arranged inside the main shell body, a plurality of placement bars for supporting the steel mesh are movably connected inside the second mounting plate, the steel mesh is clamped in the placement bar, both ends of the placement bar are respectively clamped in the second mounting plates, a driving motor five is fixedly provided on one side of one of the second mounting plates, an output end of the driving motor five passes through the second mounting plate and is connected with an adjusting screw three, an end of the adjusting screw three away from the driving motor five is rotatably connected to the inner wall of the second mounting plate, one end of the placement bar is threadedly connected to the adjusting screw three, a plurality of second electric cylinders are symmetrically distributed on the placement bar, and a pressure plate for pressing the steel mesh is fixedly provided at the output end of the second electric cylinder.

[0016] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0017] At the same time, through the above technical solutions, the utility model has at least the following beneficial effects:

[0018] 1. The utility model provides a solder paste printing device suitable for SMT patch production. By adjusting the design of the conveying component, the spacing between the two conveyor belts can be adjusted while ensuring the synchronous operation of the two conveyor belts, effectively avoiding the phenomenon of PCB board jamming or inaccurate stop positioning points during the conveying process, and improving the actual use effect of the device.

[0019] 2. The utility model provides a solder paste printing device suitable for SMT patch production. Through the design of rollers and guide plates, the position of the PCB board during transportation is restricted so that it can be accurately placed between two conveyor belts, further avoiding the PCB board from getting stuck during transportation and improving the stability of the device operation.

[0020] 3. The utility model provides a solder paste printing device suitable for SMT patch production. Through the design of the hydraulic cylinder and the support plate, the PCB board can be closely fitted with the steel mesh, effectively ensuring the printing quality of the PCB board.

[0021] 4. The utility model provides a solder paste printing device suitable for SMT patch production. Through the design of auxiliary conveying components, auxiliary transportation of PCB boards before and after printing is achieved, effectively ensuring the normal operation of the device.

[0022] 5. The utility model provides a solder paste printing device suitable for SMT patch production. Through the design of the steel mesh placement component, it can realize the positioning and installation of steel meshes of different sizes, effectively reducing the restrictions when the device is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the axial structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of the main housing and the auxiliary housing of the utility model;

[0026] Figure 3 It is a schematic diagram of a half-section structure of the main housing and the auxiliary housing of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the regulating and conveying assembly of the utility model;

[0028] Figure 5 This is a schematic diagram of the installation structure of the pulley and the turntable of the utility model;

[0029] Figure 6 It is a structural schematic diagram of the auxiliary conveying assembly of the utility model;

[0030] Figure 7 It is a structural schematic diagram of the steel mesh placement assembly of the utility model.

[0031] In the figure: 1, main housing; 2, auxiliary housing; 102, CNC screen; 3, scraper; 4, steel mesh; 5, first electric cylinder; 6, U-shaped moving block; 7, first electric slide rail; 8, first mounting plate; 9, rotating roller 1; 10, driving motor 1; 11, limit guide strip; 12, interlaced hole; 13, limit ring 1; 14, pulley; 15, synchronous belt; 16, turntable; 17, inner disk; 18, outer disk; 19, driving motor 2; 20, adjusting screw 1; 21, strip mounting groove; 22, limit guide block 1; 23, strip slide Plate; 24, movable mounting block; 25, limiting guide block 2; 26, driving motor 3; 27, adjusting screw 2; 28, hydraulic cylinder; 29, support plate; 30, notch; 31, strip conveying port; 32, receiving roller; 33, limiting guide plate; 34, second electric slide rail; 35, rotating roller 2; 36, conveyor belt; 37, limiting ring 2; 38, mounting plate; 39, driving motor 4; 40, second mounting plate; 41, placement strip; 42, driving motor 5; 43, adjusting screw 3; 44, second electric cylinder; 45, pressure plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Example

[0034] Reference Figure 1-7A solder paste printing device suitable for SMT patch production includes a main shell 1, an auxiliary shell 2 and a numerical control screen 102. The numerical control screen 102 is fixedly arranged on the outside of the main shell 1. The main shell 1 is provided with a scraping assembly and an adjustment conveying assembly for facilitating the processing of PCB boards. The auxiliary shell 2 is arranged on one side of the main shell 1 and is provided with an auxiliary conveying assembly for cooperating with the adjustment conveying assembly to transport the PCB boards. The scraping assembly includes a scraper 3 and a steel mesh 4. The scraper 3 is arranged on the top of the steel mesh 4. The top of the scraper 3 is fixedly connected to a first electric cylinder 5 for adjusting the radial position of the scraper 3. One side of the first electric cylinder 5 is fixedly connected to a U-shaped moving block 6 The bottom end of the U-shaped moving block 6 is fixedly connected to a first electric slide rail 7, which is fixedly arranged inside the main shell 1. The interior of the main shell 1 is provided with a steel mesh 4 placement component for fixing the steel mesh 4. Specifically, in the utility model, through the design of the first electric cylinder 5, the U-shaped moving block 6 and the first electric slide rail 7, the radial position and axial position of the scraper 3 are adjusted respectively, so that the solder paste can be evenly coated on the surface of the PCB board through the steel mesh 4. At the same time, the first electric cylinder 5 can also control the downward pressure of the scraper 3, so that the solder paste can be better coated on the surface of the PCB board, ensuring the normal operation of the coating work.

[0035] Reference Figure 2-4 , the regulating conveying assembly is fixedly arranged below the steel mesh 4, and the regulating conveying assembly includes a first mounting plate 8 symmetrically arranged inside the main shell 1, and a rotating roller 9 is symmetrically arranged on the first mounting plate 8, one end of the rotating roller 9 is fixedly connected to one of the first mounting plates 8, and the other end of the rotating roller 9 is movably inserted into the other first mounting plate 8, and the fixed end of the rotating roller 9 passes through the first mounting plate 8 and is connected to a driving motor 10, and a plurality of limiting guide strips 11 are fixedly arranged on the outside of one side of the rotating roller 9 through which it is inserted, and an interlacing hole 12 matching the rotating roller 9 and the limiting guide strip 11 is arranged on the first mounting plate 8, and limiting rings 13 for limiting the moving position of the rotating roller 9 are arranged at both ends of the limiting guide strip 11;

[0036] A section of the rotating roller 9 located in the first mounting plate 8 is fixedly provided with a pulley 14, and a synchronous belt 15 is sleeved on the outside of the pulley 14. A turntable 16 matching the pulley 14 is fixedly connected to the first mounting plate 8, and the turntable 16 is divided into an inner disk 17 and an outer disk 18, and the inner disk 17 is rotatably connected to the outer disk 18, and the outer disk 18 is fixedly arranged in the first mounting plate 8, and the pulley 14 is fixedly connected to the inner disk 17. Specifically, in the utility model, through the design of the driving motor 10, the rotating roller 9, the pulley 14, the synchronous belt 15 and the turntable 16, the synchronous operation of the two synchronous belts 15 is realized, and the PCB board placed outside in the main shell 1 is conveyed, so that the staff can accurately control the stop point of the PCB board, so that the part of the PCB board where the electronic components need to be spot-welded is aligned with the leakage hole of the steel mesh 4, thereby effectively solving the problem of the PCB board being stuck or the stop positioning point being inaccurate during the conveying process, and improving the actual use effect of the device.

[0037] Reference Figure 3-5 The adjusting and conveying assembly also includes a driving motor 19 and an adjusting screw 20. The output end of the driving motor 19 is fixedly connected to the adjusting screw 20. The main housing 1 is provided with a strip mounting groove 21 for facilitating the installation of the driving motor 19 and the adjusting screw 20. The end of the adjusting screw 20 away from the driving motor 19 is rotatably connected to the side wall of the strip mounting groove 21. The driving motor 19 is fixedly arranged in the strip mounting groove 21. The bottom ends of the two first mounting plates 8 are fixedly provided with a limiting guide block 22. A strip slide 23 matching the limiting guide block 22 is provided inside the main housing 1. The limiting guide block 22 is slidably clamped in the strip slide 23.

[0038] One end of the first mounting plate 8 away from the limiting guide block is threadedly connected to the adjusting screw 1 20, and the side of the adjusting screw 1 20 away from the driving motor 2 19 is threadedly connected to the movable mounting block 24, and the other first mounting plate 8 is fixedly provided with a limiting guide block 25 at one end close to the movable mounting block 24. The first mounting plate 8 is clamped on the movable mounting block 24 through the limiting guide block 25, wherein one side of the first mounting plate 8 threadedly connected to the adjusting screw 1 20 is provided with a driving motor 3 26, and the output end of the driving motor 3 26 passes through the first mounting plate 8 and is connected with an adjusting screw 27, and the end of the adjusting screw 27 away from the driving motor 3 26 is rotatably connected to the movable mounting block 24, and the end of the adjusting screw 27 located in the movable mounting block 24 is provided with an adjusting thread, and the other first mounting plate 8 is threadedly connected Connected to the adjusting screw rod 27, specifically, in the utility model, the distance between the two synchronous belts 15 is adjusted by the design of the driving motor 3 26, the adjusting screw rod 27 and the movable mounting block 24, so that the bearing and conveying of PCB boards of different sizes can be completed under the premise of ensuring the synchronous operation of the two synchronous belts 15, and the normal operation of the device can be ensured. Through the design of the limiting guide strip 11, while ensuring the normal adjustment of the distance between the two synchronous belts 15, the normal rotation of the pulley 14 driven by the rotating roller 19 is realized, so that the two synchronous belts 15 always keep synchronous operation, and the stability of the operation of the device is improved; on the other hand, through the design of the limiting ring 13, the limit position of the adjustment of the first mounting plate 8 is limited to prevent it from being separated from the rotating roller 19, and the stability of the operation of the device is further improved;

[0039] By designing the driving motor 2 19, the adjusting screw 1 20, the movable mounting block 24 and the adjusting screw 2 27, the positions of the two first mounting plates 8 are uniformly adjusted, so that they can drive the timing belt 15 after the spacing is adjusted to adjust the position, so that the PCB board transported by the timing belt 15 is always kept in the middle of the main shell 1 and corresponds to the steel mesh 4, effectively ensuring the quality of solder paste printing on the PCB board; on the other hand, by designing the limiting guide block 1 22, the strip slide 23, the limiting guide block 25 and the movable mounting block 24, the position of the first mounting plate 8 during adjustment is limited to prevent it from rotating with the adjusting screw 1 20 and the adjusting screw 27, thereby ensuring the normal use of the adjustment and conveying assembly.

[0040] When adjusting the distance between the two synchronous belts 15, the staff first controls the drive motor three 26 to start through the numerical control screen 102, and drives the adjusting screw two 27 to rotate. At this time, the first mounting plate 8 on the adjusting screw two 27 moves on the movable mounting block 24 and the rotating roller one 9. When the spacing between the two synchronous belts 15 matches the size of the PCB board to be processed, the drive motor three 26 stops. At this time, the drive motor two 19 starts and drives the adjusting screw one 20 to rotate, and drives the first mounting plate 8 on the adjusting screw one 20 and the movable mounting block 24 to adjust their positions, so that the synchronous belt 15 after the spacing adjustment is back in the middle of the main shell 1, to ensure the normal operation of the solder paste printing work.

[0041] Reference Figure 2-3 A hydraulic cylinder 28 is fixedly arranged inside the main housing 1 to lift the PCB board transported on the synchronous belt 15 upward, and a support plate 29 is fixedly connected to the output end of the hydraulic cylinder 28. A notch 30 is provided on the first mounting plate 8 to cooperate with the support plate 29 to facilitate the radial movement of the PCB board. Specifically, in the utility model, the PCB board is separated from the synchronous belt 15 and is tightly attached to the bottom of the steel mesh 4 through the design of the hydraulic cylinder 28, the support plate 29 and the notch 30, thereby effectively ensuring the molding quality of the PCB board after the solder paste is printed;

[0042] It should be noted that, in the present invention, the side of the support plate 29 that contacts the PCB board is provided with anti-slip grooves that increase friction. Through this design, the stability of the support plate 29 when lifting the PCB board upward is increased, effectively improving the actual use effect of the device.

[0043] Reference Figure 3 and Figure 5 A strip conveying port 31 is provided on one side of the main housing 1 for facilitating the entry of the PCB board. A receiving roller 32 for receiving the PCB board is rotatably connected in the strip conveying port 31. The receiving roller 32 is symmetrically provided with a limiting guide plate 33 for limiting the transport position of the PCB board. The limiting guide plate 33 is slidably sleeved on the receiving roller 32. The limiting guide plate 33 is slidably sleeved on the receiving roller 32. One end of the limiting guide plate 33 is fixedly connected to the outer disk 18. Specifically, in the utility model, through the design of the receiving roller 32 and the limiting guide plate 33, the PCB board is The externally input PCB board is guided so that it can be gradually centered during the transportation process, thereby ensuring that the PCB board is in the middle of the distance between the two synchronous belts 15 when placed on the synchronous belt 15, effectively ensuring the molding quality of the PCB board solder paste printing; on the other hand, through the fixed connection between the limiting guide plate 33 and the outer disk 18, the limiting guide plate 33 can always follow the first mounting plate 8 for position adjustment, so that the guiding and limiting plate can guide and limit PCB boards of different sizes, effectively improving the application range of the device.

[0044] Reference Figure 6The auxiliary conveying assembly includes a plurality of second electric slide rails 34 symmetrically arranged inside the auxiliary housing 2, a second rotating roller 35 is rotatably connected to the slider of the second electric slide rail 34, a conveying belt 36 is sleeved on the outer side of the second rotating roller 35, and a plurality of limiting rings 37 for limiting the conveying position of the PCB board on the conveying belt 36 are provided on the second rotating roller 35, a mounting plate 38 is fixedly provided on the slider of one of the second electric slide rails 34, a driving motor 4 39 for driving the conveying belt 36 is fixedly provided on the mounting plate 38, and an output end of the driving motor 4 39 is fixedly connected to one of the second rotating rollers 35. Specifically, in the utility model, through Through the design of the rotating roller 2 35, the conveyor belt 36 and the driving motor 4 39, the conveyor belt 36 can transport the PCB board before and after printing, effectively ensuring the normal operation of the device; at the same time, through the design of the limit ring 2 37, the position of the PCB board transported on the conveyor belt 36 is restricted to prevent it from being separated from the conveyor belt 36 during transportation, effectively ensuring the stability of transportation; on the other hand, through the design of the second electric slide rail 34, the position of the conveyor belt 36 is adjusted to enable it to complete the transportation of the PCB circuit board before and after processing, respectively, to ensure the integrity of the PCB board processing procedure.

[0045] When printing solder paste on the PCB board, the staff starts the second electric slide rail 34 through the operation control panel, adjusts the position of the conveyor belt 36, and makes the upper surface of the top conveyor belt 36 flush with the upper surface of the synchronous belt 15. At this time, the second electric slide rail 34 is stopped and the drive motor 4 39 is started to transport the PCB board, so that it is conveyed to the synchronous belt 15 through the receiving roller 32 and the limiting guide plate 33. After the PCB board reaches the designated printing position, the drive motor 4 39 stops, and the hydraulic cylinder 28 is started to drive the support plate 29 to lift up, and push the PCB board on the synchronous belt 15 upward The PCB board after the solder paste printing on the surface of the synchronous belt 15 is placed on the conveyor belt 36 at the bottom end of the second electric slide rail 34, and the conveyor belt 36 is transported to the next processing step by the conveyor belt 36.

[0046] Reference Figure 7The steel mesh 4 placement component includes a second mounting plate 40 symmetrically arranged inside the main shell 1, and a plurality of placement bars 41 for receiving the steel mesh 4 are movably connected inside the second mounting plate 40. The steel mesh 4 is clamped in the placement bar 41, and both ends of the placement bar 41 are respectively clamped in the second mounting plate 40. A driving motor 5 42 is fixedly arranged on one side of one of the second mounting plates 40. The output end of the driving motor 5 42 passes through the second mounting plate 40 and is connected to an adjusting screw 3 43. The end of the adjusting screw 3 43 away from the driving motor 5 42 is rotatably connected to the inner wall of the second mounting plate 40, and one end of the placement bar 41 is threadedly connected to the adjusting screw 3 43. A plurality of second electric cylinders 44 are symmetrically distributed on the placement bar 41, and a pressing plate 45 for pressing the steel mesh 4 is fixedly arranged at the output end of the second electric cylinder 44. Specifically, in the utility model, the distance between the two placement bars 41 is adjusted through the design of the second mounting plate 40, the adjusting screw rod 3 43 and the driving motor 5 42, so that the steel meshes 4 of different sizes can be positioned and installed, effectively reducing the restrictions on the use of the device. Through the design of the second electric cylinder 44 and the pressing plate 45, the radial position of the steel mesh 4 is restricted to avoid radial movement during the upward lifting of the PCB board, thereby ensuring the stability of the placement of the steel mesh 4.

[0047] It should be noted that, in the present invention, the thread on the adjusting screw rod 3 43 is designed with two sections of positive and negative threads with opposite rotation directions. Through this design, when the operator adjusts the spacing between the placement bars 41, he only needs to start the drive motor 5 42 to drive the two placement bars 41 to move in the same direction or in the opposite directions, so that the two placement bars 41 always maintain good centering, effectively ensuring the molding quality of solder paste printing on the PCB board; on the other hand, the contact surface between the pressure plate 45 and the steel mesh 4 is made of rubber material. Through this design, the damage caused by the pressure plate 45 pressing the steel mesh 4 is effectively reduced, thereby improving the practicality of the device.

[0048] When it is necessary to position and install steel meshes 4 of different sizes, the staff controls the start of the driving motor five 42 through the numerical control screen 102, and drives the adjusting screw three 43 to rotate, thereby adjusting the distance between the two placement bars 41 threadedly connected on the adjusting screw three 43. When the distance between the two placement bars 41 is the same as the size of the steel mesh 4 to be replaced, the driving motor five 42 stops, and the steel mesh 4 is placed on the placement bar 41. The second electric cylinder 44 is started to make the pressing plate 45 press the steel mesh 4, so as to realize the positioning and installation of steel meshes 4 of different sizes.

[0049] The use process of the solder paste printing device suitable for SMT patch production provided by the utility model is as follows:

[0050] When adjusting the distance between the two synchronous belts 15, the staff first controls the drive motor 3 26 to start through the numerical control screen 102, and drives the adjusting screw 2 27 to rotate. At this time, the first mounting plate 8 on the adjusting screw 2 27 moves on the movable mounting block 24 and the rotating roller 1 9. When the spacing between the two synchronous belts 15 matches the size of the PCB board to be processed, the drive motor 3 26 stops. At this time, the drive motor 2 19 starts and drives the adjusting screw 1 20 to rotate, and drives the first mounting plate 8 on the adjusting screw 1 20 and the movable mounting block 24 to adjust their positions, so that the synchronous belt 15 after the spacing adjustment is back in the middle of the main housing 1, ensuring the normal operation of the solder paste printing work;

[0051] When printing solder paste on the PCB board, the staff starts the second electric slide rail 34 through the operation control panel, adjusts the position of the conveyor belt 36, and makes the upper surface of the top conveyor belt 36 flush with the upper surface of the synchronous belt 15. At this time, the second electric slide rail 34 is stopped and the drive motor 4 39 is started to transport the PCB board, so that it is conveyed to the synchronous belt 15 through the receiving roller 32 and the limiting guide plate 33. After the PCB board reaches the designated printing position, the drive motor 4 39 stops, and the hydraulic cylinder 28 is started to drive the support plate 29 to lift up, and push the PCB board on the synchronous belt 15 upward The PCB board is lifted up so that it passes through the gap 30 and contacts the bottom end of the steel mesh 4. At this time, the driving motor 10 is started to print the solder paste on the PCB board. After the solder paste printing of the PCB board is completed, the second electric slide rail 34 is controlled to start, and the position of the conveyor belt 36 is adjusted so that the upper surface of the bottom conveyor belt 36 is flush with the upper surface of the synchronous belt 15. At this time, the second electric slide rail 34 is stopped, and the driving motor 4 39 is rotated to place the PCB board after the solder paste printing on the surface of the synchronous belt 15 through the receiving roller 32 on the conveyor belt 36 located at the bottom end of the second electric slide rail 34, and the conveyor belt 36 is transported to the next processing step;

[0052] When it is necessary to position and install steel meshes 4 of different sizes, the staff controls the start of the driving motor five 42 through the numerical control screen 102, and drives the adjusting screw three 43 to rotate, thereby adjusting the distance between the two placement bars 41 threadedly connected on the adjusting screw three 43. When the distance between the two placement bars 41 is the same as the size of the steel mesh 4 to be replaced, the driving motor five 42 stops, and the steel mesh 4 is placed on the placement bar 41. The second electric cylinder 44 is started to make the pressing plate 45 press the steel mesh 4, so as to realize the positioning and installation of steel meshes 4 of different sizes.

[0053] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A solder paste printing device suitable for SMT patch production, comprising a main housing (1), an auxiliary housing (2) and a numerical control screen (102), characterized in that: The numerical control screen (102) is fixedly mounted on the outside of the main shell (1); a scraping assembly and an adjusting and conveying assembly are provided inside the main shell (1) for facilitating the processing of PCB boards; the auxiliary shell (2) is arranged on one side of the main shell (1) and is provided with an auxiliary conveying assembly for cooperating with the adjusting and conveying assembly to transport PCB boards; the scraping assembly comprises a scraper (3) and a steel mesh (4); the scraper (3) is arranged on the top of the steel mesh (4); a first electric cylinder (5) for adjusting the radial position of the scraper (3) is fixedly connected to the top of the scraper (3); a U-shaped moving block (6) is fixedly connected to one side of the first electric cylinder (5); a first electric slide rail (7) is fixedly connected to the bottom end of the U-shaped moving block (6); the first electric slide rail (7) is fixedly mounted inside the main shell (1); a steel mesh (4) placement assembly is provided inside the main shell (1) for facilitating the fixed placement of the steel mesh (4).

2. A solder paste printing device suitable for SMT patch production according to claim 1, characterized in that: The adjustable conveying assembly is fixedly arranged below the steel mesh (4), and the adjustable conveying assembly comprises a first mounting plate (8) symmetrically arranged inside the main shell (1), a rotating roller (9) is symmetrically arranged on the first mounting plate (8), one end of the rotating roller (9) is fixedly connected to one of the first mounting plates (8), and the other end of the rotating roller (9) is movably inserted into the other first mounting plate (8), the fixedly connected end of the rotating roller (9) passes through the first mounting plate (8) and is connected to a driving motor (10), a plurality of limiting guide strips (11) are fixedly arranged on the outside of one side of the rotating roller (9) through which it is inserted, and an insertion hole (12) matching the rotating roller (9) and the limiting guide strip (11) is arranged on the first mounting plate (8), and limiting rings (13) for limiting the moving position of the rotating roller (9) are arranged at both ends of the limiting guide strip (11); A section of the rotating roller (9) located inside the first mounting plate (8) is fixedly provided with a pulley (14), the outer portion of the pulley (14) is sleeved with a synchronous belt (15), a turntable (16) matching the pulley (14) is fixedly connected to the first mounting plate (8), the turntable (16) is divided into an inner disk (17) and an outer disk (18), the inner disk (17) is rotatably connected to the outer disk (18), the outer disk (18) is fixedly arranged inside the first mounting plate (8), and the pulley (14) is fixedly connected to the inner disk (17).

3. A solder paste printing device suitable for SMT patch production according to claim 2, characterized in that: The regulating conveying assembly further comprises a second driving motor (19) and an adjusting screw (20), the output end of the second driving motor (19) being fixedly connected to the first adjusting screw (20), the main housing (1) being provided with a strip-shaped mounting groove (21) for facilitating the mounting of the second driving motor (19) and the first adjusting screw (20), one end of the first adjusting screw (20) away from the second driving motor (19) being rotatably connected to the side wall of the strip-shaped mounting groove (21), the second driving motor (19) being fixedly arranged in the strip-shaped mounting groove (21), the bottom ends of the two first mounting plates (8) being fixedly provided with a limiting guide block (22), the interior of the main housing (1) being provided with a strip-shaped slide plate (23) matching the limiting guide block (22), the limiting guide block (22) being slidably clamped in the strip-shaped slide plate (23); One end of the first mounting plate (8) away from the limiting guide block is threadedly connected to the adjusting screw rod (20), and the side of the adjusting screw rod (20) away from the driving motor (19) is threadedly connected to a movable mounting block (24). The other end of the first mounting plate (8) close to the movable mounting block (24) is fixedly provided with a limiting guide block (25). The first mounting plate (8) is clamped on the movable mounting block (24) through the limiting guide block (25). ) is provided with a driving motor three (26) on one side of a first mounting plate (8) which is threadedly connected, the output end of the driving motor three (26) passes through the first mounting plate (8) and is connected with an adjusting screw two (27), the end of the adjusting screw two (27) away from the driving motor three (26) is rotatably connected to the movable mounting block (24), the end of the adjusting screw two (27) located in the movable mounting block (24) is provided with an adjusting thread, and the other first mounting plate (8) is threadedly connected to the adjusting screw two (27).

4. A solder paste printing device suitable for SMT patch production according to claim 2, characterized in that: A hydraulic cylinder (28) for lifting a PCB board transported on a synchronous belt (15) is fixedly arranged inside the main housing (1); a support plate (29) is fixedly connected to the output end of the hydraulic cylinder (28); and a notch (30) is provided on the first mounting plate (8) for cooperating with the support plate (29) to facilitate radial movement of the PCB board.

5. A solder paste printing device suitable for SMT patch production according to claim 4, characterized in that: A strip-shaped conveying port (31) is provided on one side of the main housing (1) for facilitating the entry of the PCB board. A receiving roller (32) for receiving the PCB board is rotatably connected in the strip-shaped conveying port (31). A limiting guide plate (33) for limiting the transport position of the PCB board is symmetrically provided on the receiving roller (32). The limiting guide plate (33) is slidably sleeved on the receiving roller (32). One end of the limiting guide plate (33) is fixedly connected to the outer disk (18).

6. The solder paste printing device suitable for SMT patch production according to claim 1, characterized in that: The auxiliary conveying assembly comprises a plurality of second electric slide rails (34) symmetrically arranged inside the auxiliary housing (2); a second rotating roller (35) is rotatably connected to a slider of the second electric slide rail (34); a conveyor belt (36) is sleeved on the outside of the second rotating roller (35); a plurality of second limiting rings (37) for limiting the conveying position of the PCB board on the conveyor belt (36) are provided on the second rotating roller (35); a mounting plate (38) is fixedly provided on the slider of one of the second electric slide rails (34); a driving motor (39) for driving the conveyor belt (36) is fixedly provided on the mounting plate (38); and an output end of the driving motor (39) is fixedly connected to one of the second rotating rollers (35).

7. The solder paste printing device suitable for SMT patch production according to claim 1, characterized in that: The steel mesh (4) placement component comprises a second mounting plate (40) symmetrically arranged inside the main shell (1), the second mounting plate (40) is internally movably connected with a plurality of placement bars (41) for supporting the steel mesh (4), the steel mesh (4) is clamped in the placement bar (41), the two ends of the placement bar (41) are respectively clamped in the second mounting plate (40), one side of one of the second mounting plates (40) is fixedly provided with a driving motor five (42), the output end of the driving motor five (42) passes through the second mounting plate (40) and is connected with an adjusting screw three (43), the end of the adjusting screw three (43) away from the driving motor five (42) is rotatably connected to the inner wall of the second mounting plate (40), one end of the placement bar (41) is threadedly connected to the adjusting screw three (43), a plurality of second electric cylinders (44) are symmetrically distributed on the placement bar (41), and a pressing plate (45) for pressing the steel mesh (4) is fixedly provided at the output end of the second electric cylinder (44)

Images