A conductive adhesive precision printing device for fine grid lines

Abstract

This application relates to the technical field of conductive adhesive printing equipment, and discloses a precision conductive adhesive printing device for fine grid lines. The device includes a machine base, a motor fixedly mounted on the top of the machine base, a connector fixedly mounted on the output shaft end of the motor, and support columns fixedly mounted on both sides of the connector. Placement platforms are fixedly mounted on the ends of the two support columns that are far apart from each other. A precision conductive adhesive printing mechanism and a drying and curing mechanism are arranged on the top of the machine base. The precision conductive adhesive printing mechanism includes an L-shaped frame, a hydraulic cylinder, a pressure sensor, a screen holder, a fine grid line printing screen, an adhesive application assembly, and a printing assembly. The L-shaped frame is fixedly mounted on the right side of the top of the machine base. This application has the following advantages and effects: it enables seamless parallel operation of the printing and curing processes, eliminating the need to wait for a single process to finish before switching stations, significantly shortening the processing cycle of a single printed substrate, and improving processing efficiency.

Description

Technical Field

[0001] This application relates to the field of conductive adhesive printing equipment technology, and in particular to a precision printing equipment for conductive adhesive for fine grid lines. Background Technology

[0002] In precision manufacturing fields such as photovoltaic cells and flexible electronics, fine grid lines serve as the core conductive structure, primarily used to collect photogenerated carriers (electrons and holes) and transport them to the external circuitry of the battery. Currently, with the industry's increasing demand for "refinement and high throughput," the linewidth of fine grid lines has been reduced from the traditional 80-100μm to 20-50μm, placing increasingly stringent technical requirements on conductive adhesive printing equipment. The printing precision and processing efficiency of fine grid lines directly determine product performance (such as photovoltaic cell conversion efficiency and the conductivity stability of flexible circuits) and production efficiency.

[0003] In the existing technology, although the traditional conductive adhesive precision printing equipment for fine grid lines can meet the basic requirements of precision printing, it has been found that there are still at least the following shortcomings in actual use: Traditional fine grid line conductive adhesive printing equipment mostly adopts a single-station printing operation mode, that is, after one printed substrate is printed, it is necessary to wait for the equipment to be reset, transferred to the curing device and cured before the next printed substrate can be printed. During this process, there is a lot of idle waiting time for the printing mechanism and the curing device, the processing cycle of a single printed substrate is relatively long, and the processing efficiency is low.

[0004] Therefore, we propose a precision printing device for conductive adhesive for fine grid lines to solve the above problems. Utility Model Content

[0005] In order to solve the problems of long processing cycle and low processing efficiency of single printed circuit boards, this application provides a precision printing equipment for conductive adhesive for fine grid lines.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a precision printing device for conductive adhesive for fine grid lines, comprising a machine base, a motor fixedly mounted on the top of the machine base, a connector fixedly mounted on the output shaft end of the motor, support columns fixedly mounted on both sides of the connector, and a placement platform fixedly mounted on the ends of the two support columns that are far apart from each other. A precision printing mechanism for conductive adhesive and a drying and curing mechanism are provided on the top of the machine base. The precision printing mechanism for conductive adhesive includes an L-shaped frame, a hydraulic cylinder, a pressure sensor, a screen fixing base, a fine grid line printing screen, and an upper... The adhesive assembly and printing assembly are as follows: an L-shaped frame is fixedly installed on the top right side of the machine base; a hydraulic cylinder is fixedly installed on the top left side of the L-shaped frame; a pressure sensor is fixedly installed on the output shaft end of the hydraulic cylinder; a screen holder is fixedly installed on the bottom of the pressure sensor; and a fine grid line printing screen is detachably installed and fixed on the bottom of the screen holder. The screen holder has an adhesive application chamber and a printing chamber, with the printing chamber located below the adhesive application chamber. Multiple adhesive outlet holes are arrayed on the bottom inner wall of the adhesive application chamber, and all of the adhesive outlet holes are connected to the printing chamber. The bottom of the printing chamber is an open structure.

[0007] By adopting the above technical solution, the design of the placement stage facilitates the placement of the printed circuit board, and the design of the motor allows for the adjustment and interchange of the positions of the two placement stages. When the printed circuit board on one placement stage is printed under the conductive adhesive precision printing mechanism, the printed circuit board on the other placement stage has already completed the conductive adhesive curing under the drying and curing mechanism. There is no need to wait for the single process to be completed before switching stations, thus improving processing efficiency.

[0008] Optionally, two mounting ears are fixedly installed on both sides of the fine grid printing screen, and all four mounting ears are fixed to the bottom of the screen fixing base by screws.

[0009] By adopting the above technical solution, it is convenient to disassemble and assemble the fine grid line printing screen, so as to facilitate the replacement, maintenance and cleaning of the fine grid line printing screen.

[0010] Optionally, the gluing assembly includes a glue tank, a glue delivery pump, a suction pipe, a discharge pipe, a hose, and a pipe connector. The glue tank is fixedly installed on the top of the L-shaped frame and is used to hold conductive glue. The glue delivery pump is fixedly installed on the left outer wall of the glue tank. One end of the suction pipe is fixedly connected to the suction end of the glue delivery pump, and the other end of the suction pipe extends into the glue tank. One end of the discharge pipe is fixedly connected to the discharge end of the glue delivery pump. One end of the hose is fixedly connected to the other end of the discharge pipe. The pipe connector is fixedly installed on the top of the screen mounting base and is connected to the glue application chamber. The other end of the hose is fixedly connected to the top of the pipe connector.

[0011] By adopting the above technical solution, the adhesive delivery pump is used to pump the conductive adhesive in the adhesive container into the adhesive distribution chamber.

[0012] Optionally, the printing assembly includes an electric telescopic rod, a U-shaped plate, and a brush roller. The electric telescopic rod is fixedly installed on the left outer wall of the screen mounting base, and the output shaft end of the electric telescopic rod extends into the printing cavity. The U-shaped plate is fixedly installed on the output shaft end of the electric telescopic rod, and the brush roller is rotatably installed on the U-shaped plate, with the brush roller contacting the upper surface of the fine grid printing screen.

[0013] By adopting the above technical solution, the electric telescopic rod is used to control the horizontal linear movement of the U-shaped plate and the brush roller. The brush roller can be used to spread the conductive adhesive on the fine grid printing screen evenly, so that the conductive adhesive is printed on the surface of the printed substrate through the fine grid pattern holes on the fine grid printing screen to form fine grid lines.

[0014] Optionally, a glue flow sensor is fixedly installed on the glue outlet pipe, and a glue filling hole is opened on the top of the glue tank, with a plug threaded into the glue filling hole.

[0015] By adopting the above technical solution, the design of the adhesive flow sensor can monitor and measure the amount of conductive adhesive delivered to the adhesive distribution chamber, and the design of the adhesive filling hole and stopcock facilitates the replenishment of conductive adhesive into the adhesive tank.

[0016] Optionally, the drying and curing mechanism includes an L-shaped frame II, a hydraulic cylinder II, a drying chamber, and a UV curing lamp. The L-shaped frame II is fixedly installed on the top left side of the machine base, the hydraulic cylinder II is fixedly installed on the top right side of the L-shaped frame II, the drying chamber is fixedly installed on the output shaft end of the hydraulic cylinder II, the bottom of the drying chamber is an open structure, the UV curing lamp is fixedly installed on the top inner wall of the drying chamber, and the two placement platforms are located directly below the drying chamber and the screen fixing seat, respectively.

[0017] By adopting the above technical solution, the hydraulic cylinder 2 is used to control the vertical lifting of the drying oven and the UV curing lamp. The UV light emitted by the UV curing lamp can uniformly irradiate the conductive adhesive on the surface of the printed substrate and cure the conductive adhesive.

[0018] Optionally, the cross-sectional dimensions of the drying oven are the same as those of the placement table.

[0019] By adopting the above technical solution, it is possible to ensure that the printed substrate with the fine grid lines is sealed inside the drying oven.

[0020] Optionally, the placement platform has a cavity, and the top of the placement platform has multiple suction holes arranged in an array, all of which are connected to the cavity. An air pump is fixedly installed at the bottom of the placement platform, and an air suction pipe is fixedly connected to the suction end of the air pump. One end of the air suction pipe extends into the cavity, and a one-way valve is fixedly installed on the air suction pipe.

[0021] By adopting the above technical solution, the suction pump is used to extract the air in the cavity, so that multiple suction holes generate suction force, which can then firmly adsorb and fix the printed substrate on the placement table, preventing the printed substrate from shifting during printing and drying curing, and further improving printing accuracy.

[0022] Optionally, an air inlet pipe is fixedly installed at the bottom of the placement platform, with the top end of the air inlet pipe extending into the cavity, and a solenoid valve is fixedly installed on the air inlet pipe.

[0023] By adopting the above technical solution, it is easy to release the adsorption and fixation on the printed circuit board.

[0024] Optionally, a support column is fixedly installed at the bottom of the placement platform, and the bottom end of the support column is in sliding contact with the top of the machine platform. The bottom end of the support column has an arc-shaped surface structure.

[0025] By adopting the above technical solution, the stability of the placement platform during horizontal rotation can be enhanced.

[0026] This application includes at least one of the following beneficial technical effects: This application utilizes the forward and reverse rotation of the motor to adjust and interchange the positions of the two placement stages. Combined with the synergistic action of the conductive adhesive precision printing mechanism and the drying and curing mechanism, the two placement stages can be positioned at the printing station and the curing station, respectively. When the printed substrate on one placement stage is printed under the conductive adhesive precision printing mechanism, the printed substrate on the other placement stage has already completed the conductive adhesive curing under the drying and curing mechanism. This achieves seamless parallel operation of the printing and curing processes, eliminating the need to wait for the completion of a single process before switching stations, significantly shortening the processing cycle of a single printed substrate and improving processing efficiency.

[0027] This application, by providing a cavity, suction hole, suction pump, suction pipe and one-way valve on the placement stage, can reliably adsorb and fix the printed circuit board on the placement stage, preventing the printed circuit board from shifting during printing and drying curing, and further improving printing accuracy. By providing an air inlet pipe and solenoid valve on the placement stage, it is easy to release the adsorption and fixation of the printed circuit board.

[0028] This application designs four mounting ears, each fixed to the bottom of the screen holder with screws, enabling detachable installation and fixation of the fine grid line printing screen. This facilitates the replacement, maintenance, and cleaning of the fine grid line printing screen. When printing fine grid lines of different widths and spacings, only the corresponding pattern's fine grid line printing screen needs to be replaced, without adjusting the entire printing mechanism. This significantly shortens product changeover time and reduces equipment adjustment costs for multi-category production. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0030] Figure 2 This is a bottom-view three-dimensional structural diagram of the screen mounting bracket in this embodiment.

[0031] Figure 3 yes Figure 1 A magnified structural diagram of part A in the middle.

[0032] Figure 4 This is a front sectional view of the three-dimensional structure of the screen mounting bracket in this embodiment.

[0033] Figure 5 This is a front view sectional three-dimensional structural diagram of the drying oven in this embodiment.

[0034] Figure 6 This is a front sectional view of the three-dimensional structure of the placement platform in this embodiment.

[0035] In the diagram: 1. Machine base; 2. Motor; 3. Connector; 4. Support column; 5. Placement platform; 6. L-shaped frame one; 7. Hydraulic cylinder one; 8. Pressure sensor; 9. Screen fixing seat; 10. Fine grid printing screen; 11. Glue tank; 12. Glue delivery pump; 13. Glue suction pipe; 14. Glue discharge pipe; 15. Hose; 16. Pipe connector; 17. Glue application chamber; 18. Printing chamber; 19. Glue discharge hole; 20. Electric telescopic rod; 21. U-shaped plate; 22. Brush roller; 23. Glue flow sensor; 24. Plug; 25. L-shaped frame two; 26. Hydraulic cylinder two; 27. Drying oven; 28. UV ultraviolet curing lamp; 29. ​​Cavity; 30. Suction hole; 31. Air suction pump; 32. Air suction pipe; 33. One-way valve; 34. Air inlet pipe; 35. Solenoid valve; 36. Support column. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0037] This application discloses a precision printing equipment for conductive adhesive for fine grid lines, including a machine base 1. A motor 2 is fixedly installed on the top of the machine base 1, and a connector 3 is fixedly installed on the output shaft end of the motor 2. Support columns 4 are fixedly installed on both the left and right sides of the connector 3. Placement platforms 5 are fixedly installed at the ends of the two support columns 4 that are far apart from each other. The design of the placement platforms 5 facilitates the placement of printed substrates (such as photovoltaic silicon wafers and flexible circuit boards). The motor 2 is a reversible motor, which controls the horizontal rotation of the connector 3 and the two support columns 4, thereby causing the two placement platforms 5 to rotate accordingly. This facilitates the adjustment and interchange of the positions of the two placement platforms 5, allowing the two placement platforms 5 to be in the printing station and the curing station respectively. When the printed substrate on one placement platform 5 is printed under the precision printing mechanism of conductive adhesive, the printed substrate on the other placement platform 5 has already completed the conductive adhesive curing under the drying and curing mechanism. There is no need to wait for the single process to be completed before switching stations, which significantly shortens the processing cycle of a single printed substrate and improves processing efficiency.

[0038] In this embodiment, the top of the machine base 1 is equipped with a conductive adhesive precision printing mechanism and a drying and curing mechanism. The conductive adhesive precision printing mechanism includes an L-shaped frame 6, a hydraulic cylinder 7, a pressure sensor 8, a screen mounting base 9, a fine grid line printing screen 10, an adhesive application assembly, and a printing assembly. The L-shaped frame 6 is fixedly installed on the top right side of the machine base 1, the hydraulic cylinder 7 is fixedly installed on the top left side of the L-shaped frame 6, the pressure sensor 8 is fixedly installed on the output shaft end of the hydraulic cylinder 7, the screen mounting base 9 is fixedly installed on the bottom of the pressure sensor 8, and the fine grid line printing screen 10 is detachably installed and fixed on the bottom of the screen mounting base 9. The hydraulic cylinder 7 is used to control the vertical lifting and lowering of the screen mounting base 9 and the fine grid line printing screen 10. 8 is used to detect the vertically downward force applied to the printed substrate by the fine grid line printing screen 10, to avoid excessive pressure causing damage to the printed substrate, and to avoid insufficient pressure affecting the printing quality of conductive adhesive. The screen holder 9 has an adhesive distribution cavity 17 and a printing cavity 18. The printing cavity 18 is located below the adhesive distribution cavity 17. Multiple adhesive outlet holes 19 are arrayed on the bottom inner wall of the adhesive distribution cavity 17. All the adhesive outlet holes 19 are connected to the printing cavity 18. The bottom of the printing cavity 18 is open. The design of multiple adhesive outlet holes 19 can evenly distribute the conductive adhesive in the adhesive distribution cavity 17 into the printing cavity 18, so that the conductive adhesive entering the printing cavity 18 is evenly dripped onto the fine grid line printing screen 10, which helps to achieve uniform and precise printing on the printed substrate.

[0039] In this embodiment, the gluing assembly includes a glue tank 11, a glue delivery pump 12, a suction pipe 13, a discharge pipe 14, a hose 15, and a pipe connector 16. The glue tank 11 is fixedly installed on the top of the L-shaped frame 6 and is used to hold conductive glue. The glue delivery pump 12 is fixedly installed on the left outer wall of the glue tank 11. One end of the suction pipe 13 is fixedly connected to the suction end of the glue delivery pump 12, and the other end of the suction pipe 13 extends into the glue tank 11. One end of the discharge pipe 14 is fixedly connected to the discharge end of the glue delivery pump 12. One end of the hose 15 is fixedly connected to the other end of the discharge pipe 14. The pipe connector 16 is fixedly installed on the screen mounting base 9. At the top, the pipe connector 16 is connected to the adhesive application chamber 17, and the other end of the hose 15 is fixedly connected to the top of the pipe connector 16. The adhesive delivery pump 12 is used to pump the conductive adhesive in the adhesive tank 11, so that the conductive adhesive passes through the dispensing pipe 14, the hose 15 and the pipe connector 16 in sequence into the adhesive application chamber 17. An adhesive flow sensor 23 is fixedly installed on the dispensing pipe 14. The adhesive flow sensor 23 is designed to monitor and measure the amount of conductive adhesive delivered to the adhesive application chamber 17. The top of the adhesive tank 11 is provided with an adhesive filling hole, and a stopcock 24 is installed in the threaded part of the adhesive filling hole. The design of the adhesive filling hole and the stopcock 24 is to facilitate the addition of conductive adhesive to the adhesive tank 11.

[0040] In this embodiment, the printing assembly includes an electric telescopic rod 20, a U-shaped plate 21, and a brush roller 22. The electric telescopic rod 20 is fixedly installed on the left outer wall of the screen mounting base 9. The output shaft end of the electric telescopic rod 20 extends into the printing cavity 18. The U-shaped plate 21 is fixedly installed on the output shaft end of the electric telescopic rod 20. The brush roller 22 is rotatably installed on the U-shaped plate 21. The brush roller 22 contacts the upper surface of the fine grid line printing screen 10. Using the electric telescopic rod 20, the U-shaped plate 21 and the brush roller 22 can be controlled to move horizontally and linearly. Using the brush roller 22, the conductive adhesive on the fine grid line printing screen 10 can be spread evenly, so that the conductive adhesive is printed on the surface of the printing substrate through the fine grid line pattern holes on the fine grid line printing screen 10 to form fine grid lines.

[0041] In this embodiment, two mounting ears are fixedly installed on both sides of the fine grid line printing screen 10. All four mounting ears are fixed to the bottom of the screen fixing base 9 by screws, which facilitates the disassembly and assembly of the fine grid line printing screen 10, so as to facilitate the replacement or maintenance and cleaning of the fine grid line printing screen 10. When it is necessary to print fine grid lines with different line widths and spacings, only the fine grid line printing screen 10 with the corresponding pattern needs to be replaced, without adjusting the entire printing mechanism, which greatly shortens the product changeover time and reduces the equipment adjustment cost for multi-category production.

[0042] In this embodiment, the drying and curing mechanism includes an L-shaped frame 25, a hydraulic cylinder 26, a drying chamber 27, and a UV curing lamp 28. The L-shaped frame 25 is fixedly installed on the top left side of the machine base 1, the hydraulic cylinder 26 is fixedly installed on the top right side of the L-shaped frame 25, and the drying chamber 27 is fixedly installed on the output shaft end of the hydraulic cylinder 26. The bottom of the drying chamber 27 is open. The UV curing lamp 28 is fixedly installed on the top inner wall of the drying chamber 27. Two placement platforms 5 are located directly below the drying chamber 27 and the screen mounting base 9, respectively. The hydraulic cylinder 26 is used to control the vertical lifting and lowering of the drying chamber 27 and the UV curing lamp 28. The UV light emitted by the UV curing lamp 28 can uniformly irradiate the conductive adhesive on the surface of the printed substrate, cure the conductive adhesive, prevent differences in conductivity caused by incomplete local curing, and ensure the conductivity stability of the fine grid lines. The cross-sectional dimensions of the drying chamber 27 are the same as the cross-sectional dimensions of the placement platforms 5, which can ensure that the printed substrate with the printed fine grid lines is sealed inside the drying chamber 27, which helps to cure the conductive adhesive efficiently.

[0043] In this embodiment, a cavity 29 is formed inside the placement stage 5. Multiple suction holes 30 are arrayed on the top of the placement stage 5, and all suction holes 30 are connected to the cavity 29. An air suction pump 31 is fixedly installed at the bottom of the placement stage 5. An air suction pipe 32 is fixedly connected to the suction end of the air suction pump 31. One end of the air suction pipe 32 extends into the cavity 29. A one-way valve 33 is fixedly installed on the air suction pipe 32. The air suction pump 31 is used to extract air from the cavity 29, so that the multiple suction holes 30 generate suction force, thereby firmly adsorbing and fixing the printed circuit board on the placement stage 5, preventing the printed circuit board from shifting during printing and drying curing, and further improving printing accuracy. The design of the one-way valve 33 can prevent air from flowing back into the air suction pipe 32. An air inlet pipe 34 is fixedly installed at the bottom of the placement stage 5. The top end of the air inlet pipe 34 extends into the cavity 29. A solenoid valve 35 is fixedly installed on the air inlet pipe 34 to allow automatic air intake into the cavity 29 and release the adsorption and fixation of the printed circuit board.

[0044] In this embodiment, a support column 36 is fixedly installed at the bottom of the placement platform 5. The bottom end of the support column 36 slides in contact with the top of the machine platform 1. The bottom end of the support column 36 has an arc-shaped surface structure, which can enhance the stability of the placement platform 5 when it rotates horizontally.

[0045] In this embodiment, a controller is fixedly installed on the front outer wall of the machine base 1. The motor 2, hydraulic cylinder 7, hydraulic cylinder 26, pressure sensor 8, adhesive delivery pump 12, electric telescopic rod 20, adhesive flow sensor 23, UV curing lamp 28, suction pump 31, and solenoid valve 35 are all electrically connected to the controller. The controller is equipped with a display screen and multiple control buttons. The pressure value detected by pressure sensor 8 and the conductive adhesive capacity detected by adhesive flow sensor 23 can both be displayed on the display screen. The multiple control buttons are used to control the motor 2, hydraulic cylinder 7, hydraulic cylinder 26, pressure sensor 8, and adhesive delivery pump 12 respectively. The electric telescopic rod 20, adhesive flow sensor 23, UV curing lamp 28, suction pump 31, and solenoid valve 35 are powered on and operated. Each time the motor 2 rotates forward or backward, its output shaft rotates 180°, causing the two placement platforms 5 to rotate 180° accordingly. This controls the precise interchange of the positions of the two placement platforms 5, enabling the printing process on one placement platform 5 to be carried out simultaneously while the printed substrate on the other placement platform 5 undergoes the curing process. This significantly improves the overall processing efficiency. The controller uses a PLC controller, and its wiring connection and control methods are mature technologies in this field, so they will not be described in detail here.

[0046] Based on the above structure, the working principle of the conductive adhesive precision printing equipment for fine grid lines provided in this application is as follows: First, the staff takes a printed substrate to be printed and places it on the placement table 5 located on the right side (below the fine grid printing screen 10). The suction pump 31 on the placement table 5 is started and runs. The air is drawn out of the cavity 29 through the suction pipe 32, so that the cavity 29 forms a negative pressure. This causes the multiple suction holes 30 on the top of the placement table 5 to generate suction, which firmly adsorbs and fixes the printed substrate on the placement table 5, preventing the printed substrate from shifting in subsequent processes. Next, the hydraulic cylinder 7 is extended, causing the pressure sensor 8, the screen holder 9, and the fine grid printing screen 10 to move vertically downwards. When the fine grid printing screen 10 descends to contact the upper surface of the fixed printing substrate, it applies vertical downward pressure to the printing substrate. The pressure sensor 8 detects the vertical pressure of the fine grid printing screen 10 on the printing substrate in real time and transmits the pressure data to the display screen on the controller. When the pressure value is within the set range (this set range can be obtained in advance by professional technicians), the hydraulic cylinder 7 stops running. Then, the adhesive delivery pump 12 is started, drawing conductive adhesive from the adhesive tank 11 through the suction pipe 13, and then delivering it through the dispensing pipe 14, hose 15, and pipe connector 16 to the adhesive distribution chamber 17 in the screen mounting base 9. The adhesive flow sensor 23 monitors the amount of adhesive being delivered in real time, and the data is transmitted to the display screen on the controller. When the amount of adhesive entering the adhesive distribution chamber 17 reaches the set value (this set value can be pre-adjusted by professional technicians), the adhesive delivery pump 12 is stopped to avoid excessive adhesive overflow or insufficient adhesive shortage. The conductive adhesive entering the adhesive distribution chamber 17 drips evenly onto the screen through multiple dispensing holes 19. On the surface of the grid line printing screen 10, the electric telescopic rod 20 repeatedly extends and retracts, driving the U-shaped plate 21 and brush roller 22 to move horizontally in the printing cavity 18. Since the brush roller 22 contacts the upper surface of the fine grid line printing screen 10, it can evenly scrape the conductive adhesive on the fine grid line printing screen 10, allowing the conductive adhesive to pass through the fine grid line pattern holes on the fine grid line printing screen 10 and be accurately transferred to the surface of the printing substrate to form fine grid lines that meet the specifications. After printing is completed, the electric telescopic rod 20 is retracted and reset, and the hydraulic cylinder 7 is controlled to drive the screen fixing seat 9 and the fine grid line printing screen 10 to rise vertically back to their original positions. Then, control motor 2 to run forward once more. The output shaft end connector 3 and the two support columns 4 of motor 2 rotate horizontally by 180°, and the two placement platforms 5 rotate 180° accordingly. The positions of the two placement platforms 5 are interchanged. At this time, the printed substrate with fine grid lines is located directly below the drying box 27. Control hydraulic cylinder 26 to extend and drive the drying box 27 to move vertically downward. When the bottom of the drying box 27 touches the upper surface of the placement platform 5 directly below it, stop the operation of hydraulic cylinder 26. Since the cross-sectional dimensions of the drying box 27 are the same as those of the placement platform 5, the printed substrate with fine grid lines can be sealed inside the drying box 27. At the same time, turn on the UV ultraviolet light curing lamp 28 to emit UV ultraviolet light and irradiate the conductive adhesive on the surface of the printed substrate evenly. This will allow the conductive adhesive on the printed substrate to be cured and shaped quickly, and prevent differences in conductivity caused by incomplete local curing. During the curing process of the printed circuit board, the operator takes another printed circuit board to be printed and places it on the placement platform 5 located on the right side (below the fine grid printing screen 10). Following the above operation steps, conductive adhesive can be evenly applied to this printed circuit board to form fine grid lines that meet the specifications. When the conductive adhesive on the surface of the printed circuit board inside the drying oven 27 has cured within the specified time, the hydraulic cylinder 26 is controlled to retract and reset, driving the drying oven 27 to rise back to its original position. The solenoid valve 35 located at the bottom of the placement platform 5 on the left side (the placement platform 5 directly below the drying oven 27) is opened, and outside air enters the cavity 29 through the air inlet pipe 34 to balance the air pressure inside and outside the cavity 29. The suction force of the suction hole 30 disappears, and the operator can easily remove the cured printed circuit board. After the cured printed substrate is removed, a new substrate to be printed can be placed on an empty placement platform 5. The process of firmly adsorbing and fixing the printed substrate and controlling the forward and reverse rotation of the motor 2 to exchange the positions of the two placement platforms 5 can be repeated. This allows the printing and curing processes to run in parallel, enabling continuous batch production and maximizing processing efficiency.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precision printing device for conductive adhesive for fine grid lines, characterized in that, The machine includes a machine base (1), on which a motor (2) is fixedly installed. A connector (3) is fixedly installed on the output shaft end of the motor (2). Support columns (4) are fixedly installed on both sides of the connector (3). Placement platforms (5) are fixedly installed on the ends of the two support columns (4) that are far apart from each other. A conductive adhesive precision printing mechanism and a drying and curing mechanism are provided on the top of the machine base (1). The conductive adhesive precision printing mechanism includes an L-shaped frame (6), a hydraulic cylinder (7), a pressure sensor (8), a screen fixing seat (9), a fine grid line printing screen (10), an adhesive application assembly, and a printing assembly. The L-shaped frame (6) is fixedly installed on the top right side of the machine base (1). The hydraulic cylinder... One (7) is fixedly installed on the top left side of the L-shaped frame one (6). The pressure sensor (8) is fixedly installed on the output shaft end of the hydraulic cylinder one (7). The screen fixing seat (9) is fixedly installed on the bottom of the pressure sensor (8). The fine grid line printing screen (10) is detachably installed and fixed on the bottom of the screen fixing seat (9). The screen fixing seat (9) has a glue-spreading cavity (17) and a printing cavity (18). The printing cavity (18) is located below the glue-spreading cavity (17). Multiple glue outlet holes (19) are arrayed on the bottom inner wall of the glue-spreading cavity (17). The multiple glue outlet holes (19) are all connected to the printing cavity (18). The bottom of the printing cavity (18) is an open structure.

2. The precision printing equipment for conductive adhesive for fine grid lines according to claim 1, characterized in that: The fine grid printing screen (10) has two mounting ears fixedly installed on both sides, and all four mounting ears are fixed to the bottom of the screen fixing base (9) by screws.

3. The precision printing equipment for conductive adhesive for fine grid lines according to claim 1, characterized in that: The adhesive application assembly includes an adhesive container (11), an adhesive delivery pump (12), an adhesive suction pipe (13), an adhesive outlet pipe (14), a flexible hose (15), and a pipe connector (16). The adhesive container (11) is fixedly installed on the top of the L-shaped frame (6) and is used to hold conductive adhesive. The adhesive delivery pump (12) is fixedly installed on the left outer wall of the adhesive container (11). One end of the adhesive suction pipe (13) is fixedly connected to the suction end of the adhesive delivery pump (12). The other end of the suction tube (13) extends into the glue tank (11), one end of the glue outlet tube (14) is fixedly connected to the discharge end of the glue transfer pump (12), one end of the hose (15) is fixedly connected to the other end of the glue outlet tube (14), the pipe connector (16) is fixedly installed on the top of the screen fixing base (9), the pipe connector (16) is connected to the glue application chamber (17), and the other end of the hose (15) is fixedly connected to the top end of the pipe connector (16).

4. The precision printing equipment for conductive adhesive for fine grid lines according to claim 3, characterized in that: The printing assembly includes an electric telescopic rod (20), a U-shaped plate (21), and a brush roller (22). The electric telescopic rod (20) is fixedly installed on the left outer wall of the screen mounting base (9). The output shaft end of the electric telescopic rod (20) extends into the printing cavity (18). The U-shaped plate (21) is fixedly installed on the output shaft end of the electric telescopic rod (20). The brush roller (22) is rotatably installed on the U-shaped plate (21). The brush roller (22) is in contact with the upper surface of the fine grid printing screen (10).

5. The precision printing equipment for conductive adhesive for fine grid lines according to claim 4, characterized in that: A glue flow sensor (23) is fixedly installed on the glue outlet pipe (14), and a glue filling hole is opened on the top of the glue container (11), with a plug (24) threaded inside the glue filling hole.

6. The precision printing equipment for conductive adhesive for fine grid lines according to claim 1, characterized in that: The drying and curing mechanism includes an L-shaped frame (25), a hydraulic cylinder (26), a drying chamber (27), and a UV curing lamp (28). The L-shaped frame (25) is fixedly installed on the top left side of the machine base (1), the hydraulic cylinder (26) is fixedly installed on the top right side of the L-shaped frame (25), the drying chamber (27) is fixedly installed on the output shaft end of the hydraulic cylinder (26), the bottom of the drying chamber (27) is open, the UV curing lamp (28) is fixedly installed on the top inner wall of the drying chamber (27), and the two placement platforms (5) are located directly below the drying chamber (27) and the screen fixing seat (9), respectively.

7. The precision printing equipment for conductive adhesive for fine grid lines according to claim 6, characterized in that: The cross-sectional dimensions of the drying oven (27) are the same as those of the placement platform (5).

8. The precision printing equipment for conductive adhesive for fine grid lines according to claim 1, characterized in that: The placement platform (5) has a cavity (29) inside. The top of the placement platform (5) has multiple suction holes (30) arranged in an array. All of the suction holes (30) are connected to the cavity (29). An air pump (31) is fixedly installed at the bottom of the placement platform (5). An air suction pipe (32) is fixedly connected to the suction end of the air pump (31). One end of the air suction pipe (32) extends into the cavity (29). A one-way valve (33) is fixedly installed on the air suction pipe (32).

9. The precision printing equipment for conductive adhesive for fine grid lines according to claim 8, characterized in that: An air inlet pipe (34) is fixedly installed at the bottom of the placement platform (5), the top end of the air inlet pipe (34) extends into the cavity (29), and a solenoid valve (35) is fixedly installed on the air inlet pipe (34).

10. The precision printing equipment for conductive adhesive for fine grid lines according to claim 1, characterized in that: The bottom of the placement platform (5) is fixedly installed with a support column (36), the bottom end of the support column (36) slides in contact with the top of the machine platform (1), and the bottom end of the support column (36) has an arc-shaped surface structure.

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