Screen printing device for circuit board processing

Abstract

The invention relates to the technical field of screen printing machines, in particular to a screen printing device for circuit board processing. The switching mechanism comprises electric sliding rails symmetrically arranged between the moving frames on the two sides, a cross beam is arranged between sliding blocks of the electric sliding rails on the two sides, air cylinders are symmetrically installed on the cross beam, pushing frames are symmetrically arranged on the cross beam in a sliding and penetrating mode, and the pushing frames are connected with the telescopic ends of the adjacent air cylinders; the two ends of the pushing frame are each rotationally provided with a stirring frame, and scraping plates are arranged on the stirring frames. By arranging the switching mechanism and the cleaning mechanism, rapid replacement of the scraper for ink returning and ink scraping treatment in the screen printing operation process is achieved, the cleaning mechanism is synchronously started while replacement of the scraper is completed, the old scraper is subjected to soaking cleaning and surface wiping, residual ink is effectively removed, and the efficiency is improved. And it is ensured that the scraper has good flatness and contact effect when used again, so that the automatic cleaning function is integrated on the basis that the scraper is automatically replaced, and the printing precision and consistency are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing machines, and in particular to a screen printing device for processing circuit boards. Background Art

[0002] Screen printing is a critical process in the PCB manufacturing process, where text, symbols, graphics, and other information are printed onto the board surface, providing important guidance for subsequent assembly, commissioning, and maintenance. Existing screen printing equipment typically completes the printing process by raising or lowering the screen frame to contact or remove it from the PCB on a table.

[0003] Before the screen printing frame is attached to the circuit board, an ink return knife is usually used to gently attach the screen printing frame to evenly spread the ink on the screen without applying additional pressure. Then, after the screen printing frame and the circuit board are tightly attached, a certain amount of pressure is applied downward with a scraper. Under the action of pressure, the ink passes through the holes in the screen and is evenly transferred to the surface of the circuit board to achieve the printing effect.

[0004] However, during long-term continuous operation, the ink is exposed to the air for a long time, causing the moisture in it to gradually evaporate, or due to factors such as excessively high ambient temperature and humidity, and the ink being in a static state during production interruptions, the fluidity of the ink gradually decreases, and then local solidification occurs. This solidification often occurs on the surface of the ink return knife and the scraper, causing lumps and protrusions to form on their contact surface, destroying the originally smooth scraping surface. When the surface of the ink return knife or scraper becomes rough, problems such as uneven ink distribution and ink breakage are likely to occur in the subsequent printing process, affecting printing quality and equipment life. At present, the industry generally adopts the method of stopping the machine and disassembling related parts for manual cleaning to deal with such problems, but this method is not only cumbersome to operate, but also inevitably causes production line interruptions, reducing overall production efficiency.

[0005] To this end, a screen printing device for circuit board processing has been specially designed, which has the ability to perform real-time maintenance on the ink return blade and scraper during operation and integrates an automatic cleaning function to maintain the flatness of the scraping surface and the stability of the printing quality, thereby improving equipment operation efficiency and product yield. Summary of the Invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a screen printing device for circuit board processing that has the ability to perform real-time maintenance on the ink return blade and the scraper during operation and integrates an automatic cleaning function.

[0007] The technical solution is as follows: A screen printing device for circuit board processing, comprising: Workbench; The lifting platform is arranged at the rear side of the workbench, and has movable ends on both sides of the lifting platform. The movable ends on both sides are provided with movable frames, and the movable frames are provided with mounting parts. The mounting parts on both sides are used to place the screen printing frame body; The switching mechanism includes an electric slide rail symmetrically arranged between the movable frames on both sides, a crossbeam is arranged between the sliders of the electric slide rails on both sides, a cylinder with a telescopic end facing upward is symmetrically installed on the crossbeam, and a push frame is symmetrically slidably penetrated on the crossbeam, the push frame is connected to the telescopic end of the adjacent cylinder, and a driving motor is respectively installed at one end of the lower part of the push frame, the driving motors on both sides are relatively distributed, and a toggle frame is rotatably arranged at both ends of the push frame, a driving gear is provided at the shaft end of the toggle frame below the driving motor, the driving gear is connected to the output end of the driving motor on the same side, and a driven gear is provided at the shaft end of the other two toggle frames, the driven gear is meshed with the driving gear on the same side, and a scraper is provided on each toggle frame, and the scrapers on both sides are used for ink return and ink scraping respectively; The cleaning mechanism is symmetrically arranged between the movable frames and is used for cleaning the scraper.

[0008] Furthermore, the mounting parts include mounting frames and fixing bolts. The mounting frames are provided on the opposite sides of the movable frames. The mounting frames on both sides are used to place the silk screen frame body, and the mounting frames are threaded with fixing bolts for abutting and fixing the position of the silk screen frame body.

[0009] Furthermore, the cleaning mechanism includes connecting parts arranged at the front and rear ends of the movable frame, a processing frame is installed between the two connecting parts opposite to each other on the left and right, a water inlet pipe and a drain pipe are respectively provided on both sides of the processing frame, a group of support rods are provided on the left and right sides of the inside of the processing frame, and a rotating rod is rotated on the support rod, and two elastic parts are provided between the rotating rod and the corresponding support rod, and a wiping part is provided between the two rotating rods opposite to each other on the left and right.

[0010] Furthermore, the connecting member includes mounting plates arranged at the ends of the movable frames on both sides, and the processing frame is symmetrically provided with card blocks adapted to the layout of the mounting plates, and the card blocks are slidably abutted and adapted with the corresponding mounting plates.

[0011] Furthermore, it also includes a limit part, which includes a plurality of inclined plates arranged on the electric slide rail sliders on both sides. A resistance frame is slidably provided at both ends of the pushing frame. Both sides of the resistance frame have protruding ends that contact and abut with the inclined plates on the same side. An elastic part is provided between the resistance frame and the inner wall of the corresponding pushing frame, and an extension plate is provided at the end of the pushing frame to abut with the corresponding resistance frame.

[0012] Furthermore, it also includes a centralizing mechanism, which includes electric push rods respectively installed on the mounting frames on both sides, and an arc plate for pushing the ink to concentrate is provided on the telescopic end of the electric push rod.

[0013] Furthermore, the centralized mechanism also includes a limit plate, the arc plate is slidably connected to the telescopic end of the corresponding electric push rod, and both ends of the arc plate are hinged with a limit plate that abuts and adapts to the mounting frame on the same side.

[0014] Furthermore, it also includes a positioning mechanism, which includes a guide plate arranged on the workbench, a placement plate slidingly arranged on the guide plate, a right-angle plate arranged along the circumferential direction is arranged on the placement plate, and rings adapted to abut against the placement plate are slidingly arranged on both sides of the guide plate.

[0015] The beneficial effects are as follows: 1. The present invention realizes the rapid replacement of scrapers used for ink return and scraping during the silk screen printing process by setting a switching mechanism and a cleaning mechanism. The structure uses a driving motor to provide power, and drives the two sets of scrapers to achieve rapid rotation and replacement through the meshing transmission of the driving gear and the driven gear. When the scraper is replaced, the cleaning mechanism is started synchronously to soak and clean the old scraper and wipe the surface, effectively removing residual ink and ensuring that the scraper has good flatness and contact effect when it is used again. In this way, on the basis of automatic replacement of the scraper, an automatic cleaning function is integrated to avoid the downtime loss caused by traditional manual disassembly and cleaning, significantly improve the continuous operation capability and production efficiency of the equipment, and further improve printing accuracy and consistency.

[0016] 2. The limiting parts in the present invention include an inclined plate, a support frame, an elastic part and an extension plate. These parts work together to automatically release the limiting constraint before the scraper is switched. After the switch is completed, the new scraper is firmly fixed again, effectively preventing the scraper instability caused by loose connection, thereby enhancing the operating safety and stability of the entire system and ensuring the continuity and reliability of the screen printing process.

[0017] 3. The present invention is also provided with a centralizing mechanism, which drives the arc plate through an electric push rod to push and concentrate the ink overflowing and residual on the silk screen frame, which not only reduces the waste of ink materials, but also improves the cleanliness of the overall working environment and the sustainability of production.

[0018] 4. The present invention ensures that the four corners of the circuit board body can be accurately positioned through the coordinated use of the guide plate, the placement plate and the right-angle plate; at the same time, the ring structure further limits the movement of the placement plate, so that the circuit board remains stable during the printing process, effectively improving the position accuracy during the printing process, thereby enhancing the consistency and yield rate of the product and meeting the requirements of high-quality screen printing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of some components of the switching mechanism of the present invention.

[0021] Figure 3 It is a three-dimensional structural diagram of components such as the movable frame, the installation frame and the fixing bolt of the present invention.

[0022] Figure 4 It is a three-dimensional structural diagram of components such as the driven gear, the shifting frame and the scraper of the present invention.

[0023] Figure 5 It is a three-dimensional structural diagram of the components such as the pushing frame, driving motor and driving gear of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the various components of the limiter of the present invention.

[0025] Figure 7 It is a three-dimensional structural diagram of the various components of the cleaning mechanism of the present invention.

[0026] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of part A.

[0027] Figure 9 For the present invention Figure 7 Schematic diagram of the enlarged portion B.

[0028] Figure 10 It is a three-dimensional structural diagram of the components of the centralized mechanism of the present invention.

[0029] Figure 11 It is a three-dimensional structural diagram of the various components of the positioning mechanism of the present invention.

[0030] Parts names and serial numbers in the figure: 100, circuit board body, 101, screen printing frame body, 1, workbench, 2, lifting platform, 21, mobile frame, 22, installation frame, 23, fixing bolt, 3, switching mechanism, 31, electric slide rail, 32, beam, 33, cylinder, 34, push frame, 35, drive motor, 36, drive gear, 37, driven gear, 38, toggle frame, 39, scraper, 4, limiter, 41, inclined plate, 42, Abutment frame, 43. Elastic part 1, 44. Extension plate, 5. Cleaning mechanism, 50. Mounting plate, 51. Processing frame, 511. Block, 52. Water inlet pipe, 53. Drain pipe, 54. Support rod, 55. Rotating rod, 56. Wiping member, 57. Elastic part 2, 6. Centralizing mechanism, 61. Electric push rod, 62. Arc plate, 63. Limiting plate, 7. Positioning mechanism, 71. Guide plate, 72. Placement plate, 73. Right-angle plate, 74. Ring. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Embodiment: A screen printing device for circuit board processing, such as Figures 1-9 Shown, including: Workbench 1, serving as the basic support platform for the entire device, is used to carry the required components and to place the circuit board body 100; The lifting platform 2 is arranged at the rear side of the workbench 1, and has movable ends on both sides of the lifting platform 2. A movable frame 21 is provided on each movable end, and a mounting member is provided on each movable frame 21. The mounting members on both sides are used to support and restrict the placement of the screen printing frame body 101. The lifting platform 2 controls the bonding and separation between the screen printing frame body 101 and the circuit board body 100 through vertical movement, thereby realizing the start and stop control of the printing action; The switching mechanism 3 includes an electric slide 31 symmetrically arranged between the two side moving frames 21, a crossbeam 32 is provided between the sliders of the electric slide 31 on both sides, and a cylinder 33 with a telescopic end facing upward is symmetrically installed on the crossbeam 32, and a push frame 34 is also symmetrically slidably penetrated on the crossbeam 32. The push frame 34 can slide up and down along the crossbeam 32, and the push frame 34 is connected to the telescopic end of the adjacent cylinder 33. A driving motor 35 is installed at one end of the lower part of the push frame 34. The driving motors on both sides The machines 35 are arranged front and back relative to each other, and a toggle frame 38 is rotatably provided at the front and rear ends of the pushing frame 34. A driving gear 36 is provided at the shaft end of the toggle frame 38 below the driving motor 35. The driving gear 36 is connected to the output end of the driving motor 35 on the same side, and a driven gear 37 is provided at the shaft end of the other two toggle frames 38. The driven gear 37 meshes with the driving gear 36 on the same side. A scraper 39 is fixed at the bottom of each toggle frame 38. The scrapers 39 on both sides are used for ink return and ink scraping respectively. Furthermore, the switching mechanism 3 drives the crossbeam 32 to move laterally via the electric slide 31, causing the scraper 39 to translate along the surface of the screen printing frame 101 to spread the ink. Simultaneously, the cylinder 33 drives the push frame 34 up and down, bringing the scraper 39 into and out of contact with the screen printing frame 101. The drive motor 35 rotates the drive gear 36, which, through meshing with the driven gear 37, rotates the toggle frame 38, thereby switching the position of the scraper 39. Alternating between the two allows for rapid replacement without stopping the machine, resulting in a more continuous printing process.

[0033] It can be seen that the mechanism realizes the automatic lifting, rotation and switching functions of the scraper 39, has a compact structure and coordinated movements, significantly improves the automation level and work efficiency of the equipment, reduces the frequency of manual intervention, and improves the consistency of printing effects.

[0034] The cleaning mechanism 5 is symmetrically arranged between the movable frames 21. The cleaning mechanism 5 can automatically clean and wipe the surface of the scraper 39 while replacing it, effectively removing the attached ink and ensuring the flatness and contact of the scraper 39 when it is used again, thereby improving the stability of the printing quality.

[0035] like Figure 2 、 Figure 3 and Figure 10 As shown, the mounting parts include a mounting frame 22 and a fixing bolt 23. The mounting frames 22 are fixedly provided on the opposite sides of the movable frames 21 on both sides. The two mounting frames 22 cooperate with each other to carry and position the screen printing frame body 101, and the front and rear sides of the mounting frames 22 are both threaded with fixing bolts 23 for abutting and fixing the position of the screen printing frame body 101. By rotating the fixing bolt 23, its end can be screwed in toward the screen printing frame body 101 to achieve abutment and fixation of the screen printing frame body 101.

[0036] like Figure 7 and Figure 9 As shown, the cleaning mechanism 5 includes connecting pieces arranged at the front and rear ends of the mobile frame 21, and a processing frame 51 is installed between the two connecting pieces opposite to each other on the left and right. The overall length of the processing frame 51 is greater than the overall stroke of each electric slide rail 31, ensuring that the scraper 39 can maintain a stable immersed state inside the processing frame 51 during subsequent use, thereby achieving continuous and effective cleaning. A water inlet pipe 52 and a drain pipe 53 are respectively provided on both sides of the processing frame 51. Valves for controlling opening and closing are installed on the water inlet pipe 52 and the drain pipe 53 to facilitate the input and discharge of the cleaning liquid, ensuring the circulation of the cleaning liquid. Ring update, a group of support rods 54 arranged in a front-to-back spacing are provided on the left and right sides of the inside of the processing frame 51, and a rotating rod 55 is rotated on the support rod 54. An elastic member 57 is provided between the rotating rod 55 and the corresponding support rod 54. In this embodiment, the elastic member 57 is a spring to provide appropriate reset force and ensure that the corresponding rotating rod 55 can achieve stable rotation, and a wiper 56 is provided between the two rotating rods 55 opposite to each other on the left and right. When the scraper 39 rises from the processing frame 51, it will pass between the wipers 56 to effectively remove the ink on the surface of the scraper 39 after use.

[0037] like Figure 7 and Figure 8 As shown, the connecting parts include mounting plates 50 fixedly arranged at the ends of the movable frames 21 on both sides, a T-shaped slot is provided on the mounting plates 50, and blocks 511 adapted to the layout of the mounting plates 50 are symmetrically provided on the left and right sides of the processing frame 51. The blocks 511 are slidably abutted against the corresponding mounting plates 50, and the processing frame 51 can be quickly installed and disassembled by sliding up and down. This connection method is not only convenient for assembly and maintenance, but also ensures the overall stability of the cleaning mechanism 5 during operation.

[0038] like Figure 6As shown, it also includes a limit member 4, which includes three inclined plates 41 arranged on the sliders of the electric slide rails 31 on both sides, and abutment frames 42 are slidably provided at the front and rear ends of the pushing frame 34. The left and right sides of the abutment frame 42 have protruding ends that contact and abut with the inclined plates 41 on the same side, and an elastic member 43 is provided between the abutment frame 42 and the inner wall of the corresponding pushing frame 34. In this embodiment, the elastic member 43 is a spring, and the end of the pushing frame 34 is fixedly provided with an extension plate 44 that abuts with the corresponding abutment frame 42. The function of the limit member 4 is to realize the position limitation of the scraper 39 in use, and to realize the automatic limitation and release of the scraper 39 and the extension plate 44 when the inclined plate 41 is in contact with the corresponding abutment frame 42.

[0039] like Figure 10 As shown, it also includes a centralizing mechanism 6, which includes electric push rods 61 respectively installed on the mounting frames 22 on both sides. An arc plate 62 is provided on the telescopic end of the electric push rod 61. The arc plate 62 can fit the internal contour of the silk screen frame body 101 to ensure that the dispersed ink is effectively pushed to the central area during the movement.

[0040] like Figure 10 As shown, the centralized mechanism 6 also includes a limit plate 63. The arc plate 62 is slidably connected to the telescopic end of the corresponding electric push rod 61, so that the arc plate 62 can slide up and down. The front and rear ends of the arc plate 62 are hinged with a limit plate 63 that abuts and adapts to the mounting frame 22 on the same side. By pushing the arc plate 62 upward and rotating the limit plate 63 to abut on the mounting frame 22, the position of the arc plate 62 and the screen printing frame body 101 is effectively ensured, so that the two are separated, so that the screen printing frame body 101 can be replaced later.

[0041] like Figure 11 As shown, it also includes a positioning mechanism 7, which includes a guide plate 71 arranged on the workbench 1, a placement plate 72 is slidably provided on the guide plate 71, and a right-angle plate 73 arranged along the circumferential direction is provided on the placement plate 72. Rings 74 that are adapted to abut against the placement plate 72 are slidably provided on the left and right sides of the guide plate 71, and the rings 74 play a limiting role. After the placement plate 72 is in place, it can be locked by the rings 74 to avoid unnecessary movement during the printing process.

[0042] During use, first ensure that the device is placed stably. Then push the rings 74 on both sides to release the limit on the placement plate 72, and then slide the placement plate 72 forward along the guide plate 71. Place the circuit board body 100 to be screen-printed on the placement plate 72, and align the four corners of the circuit board body 100 with the right-angle plates 73 at the corresponding positions. After positioning is completed, push the placement plate 72 back into the guide plate 71, and reset the rings 74 on both sides to fix the position of the placement plate 72. Next, install the screen printing frame body 101, directly insert it between the mounting frames 22 on both sides, tighten the fixing bolts 23, move it downward and press the screen printing frame body 101, so as to achieve a firm fixation. Then install the cleaning mechanism 5. During installation, align the block 511 on the two processing frames 51 with the corresponding position of the mounting plate 50, and slide it downward after fitting, so as to achieve the positioning and fixation of the cleaning mechanism 5. At the same time, the water inlet pipe 52 and the drain pipe 53 are connected to the water supply and drainage equipment respectively to ensure that the cleaning liquid inside the processing frame 51 can be circulated and replaced.

[0043] After the preparatory work is complete, the lifting platform 2 is activated, driving the upper components to move upward and downward, so that the screen printing frame body 101 is aligned with the circuit board body 100 below. The required ink is then poured into the screen printing frame body 101, and the cylinder 33 on one side is activated to extend its telescopic end, driving the corresponding push frame 34 and its components to rise, allowing the scraper 39 mounted thereon to separate from the screen printing frame body 101. Next, the cylinder 33 on the other side is activated to retract its telescopic end, driving the push frame 34 and its components downward, so that the scraper 39 mounted thereon is tightly aligned with the screen printing frame body 101.

[0044] During this process, the drive gear 36 and the driven gear 37 remain engaged, sliding synchronously but not disengaging, ensuring stable transmission. The motorized slide 31 is then activated, driving the slider and the components on the crossbeam 32 to translate left and right. The scraper 39, attached to the screen printing frame 101, moves synchronously, applying pressure to the ink and spreading it evenly, forcing it to pass through the screen printing frame 101 and onto the circuit board 100 below.

[0045] After a printing cycle is completed, the lifting platform 2 drives the upper components upward, separating the screen printing frame 101 from the printed circuit board 100. The electric push rod 61 is then activated, driving the connected curved plate 62 to push the ink that has exceeded the travel range of the scraper 39 and overflowed toward the center. The reverse operation is then performed: the raised scraper 39 is lowered, while the used scraper 39 is raised. The lowered scraper 39 is then used to push the used ink from one side, concentrating the ink for subsequent use.

[0046] When a set of scrapers 39 accumulates a large amount of ink after use, the cylinders 33 on both sides can be activated while the circuit board body 100 is being replaced, causing the push frame 34 to rise as a whole, freeing each scraper 39 from the constraints of the screen printing frame body 101. Simultaneously, the raised end of the support frame 42 comes into contact with the inclined plate 41 on the same side. Under the action of the inclined plate 41, the support frame 42 is pushed away from each other and slides, causing the elastic member 1 43 to deform accordingly. As the support frame 42 moves, it separates from the extension plate 44 until it slides to the end of the inclined plate 41, allowing the support frame 42 to be abutted by the inclined plate 41 and restrained in position, thereby releasing the constraints on the scrapers 39 and extension plate 44, facilitating subsequent replacement.

[0047] The drive motors 35 on both sides are then activated, driving the drive gears 36 to rotate, further driving the shifting frame 38 and the old scraper 39 on it to rotate toward the processing frame 51. Simultaneously, the drive gears 36 and the driven gears 37 engage, driving the shifting frame 38 and the new scraper 39 on the other side to rotate toward the push frame 34, fitting them together and replacing the old scraper 39 for quick replacement. The old scraper 39 then rests above the processing frame 51, awaiting cleaning.

[0048] When a new scraper 39 is put into use, the old scraper 39 enters the processing frame 51 during the lifting motion, where it dissolves adhered ink in the cleaning fluid. Furthermore, as the new scraper 39 translates during use, the old scraper 39 continues to soak and clean within the processing frame 51 until it is next replaced, gradually rising and exiting the processing frame 51 during the aforementioned lifting process. During this ascent, the scraper 39 passes between the wipers 56, receiving a close-fitting wipe. The rotating rod 55 adaptively rotates on the support rod 54, causing the elastic member 2 57 to deform accordingly, ensuring a stable and reliable wiping effect.

[0049] Through the above process, the scraper 39 can be quickly replaced and automatically cleaned. The whole process is coherent and efficient, which significantly improves the user experience and work efficiency of the equipment.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screen printing device for circuit board processing, comprising: Workbench (1); A lifting platform (2) is arranged at the rear side of the workbench (1), and has movable ends on both sides of the lifting platform (2), and movable frames (21) are provided on both sides of the movable ends, and mounting parts are provided on both sides of the movable frames (21), and the mounting parts on both sides are used to place the screen printing frame body (101); The invention is characterized in that it further comprises: a switching mechanism (3), wherein the switching mechanism (3) comprises an electric slide rail (31) symmetrically arranged between the movable frames (21) on both sides, a crossbeam (32) is arranged between the sliders of the electric slide rails (31) on both sides, a cylinder (33) with its telescopic end facing upward is symmetrically mounted on the crossbeam (32), and a push frame (34) is symmetrically slidably penetrated on the crossbeam (32), the push frame (34) is connected to the telescopic end of the adjacent cylinder (33), and a driving motor (35) is respectively installed at one end of the lower part of the push frame (34), and the driving motors (35) on both sides are symmetrically mounted on the crossbeam (32). ) are relatively distributed, and a toggle frame (38) is rotatably provided at each end of the pushing frame (34), and a driving gear (36) is provided at the shaft end of the toggle frame (38) located below the driving motor (35), and the driving gear (36) is connected to the output end of the driving motor (35) on the same side, while the shaft ends of the other two toggle frames (38) are provided with driven gears (37), and the driven gears (37) are meshed with the driving gear (36) on the same side, and scrapers (39) are provided on each of the toggle frames (38), and the scrapers (39) on both sides are used for ink return and ink scraping respectively; A cleaning mechanism (5) is symmetrically arranged between the movable frames (21) and is used for cleaning the scraper (39).

2. A screen printing device for circuit board processing according to claim 1, characterized in that: The mounting member includes a mounting frame (22) and a fixing bolt (23). The mounting frames (22) are provided on opposite sides of the movable frames (21). The mounting frames (22) on both sides are used to place the screen printing frame body (101), and the mounting frames (22) are threadedly provided with fixing bolts (23) for abutting and fixing the position of the screen printing frame body (101).

3. A screen printing device for circuit board processing according to claim 2, characterized in that: The cleaning mechanism (5) includes connecting members arranged at the front and rear ends of the movable frame (21), a processing frame (51) is installed between the two connecting members on the left and right sides, a water inlet pipe (52) and a drain pipe (53) are respectively provided on both sides of the processing frame (51), a group of support rods (54) are provided on the left and right sides of the interior of the processing frame (51), a rotating rod (55) is rotated on each of the support rods (54), an elastic member (57) is provided between the rotating rod (55) and the corresponding support rod (54), and a wiping member (56) is provided between the two rotating rods (55) on the left and right sides.

4. A screen printing device for circuit board processing according to claim 3, characterized in that: The connecting member comprises mounting plates (50) arranged at the ends of the movable frames (21) on both sides, and the processing frame (51) is symmetrically provided with clamping blocks (511) adapted to the layout of the mounting plates (50), and the clamping blocks (511) are adapted to slide against the corresponding mounting plates (50).

5. A screen printing device for circuit board processing according to claim 4, characterized in that: The invention also includes a limiting member (4), wherein the limiting member (4) includes a plurality of inclined plates (41) arranged on the sliders of the electric slide rail (31) on both sides, and abutment frames (42) are slidably arranged at both ends of the pushing frame (34), and both sides of the abutment frame (42) have protruding ends that contact and abut with the inclined plates (41) on the same side, and an elastic member (43) is arranged between the abutment frame (42) and the inner wall of the corresponding pushing frame (34), and an extension plate (44) is arranged at the end of the pushing frame (34) to abut with the corresponding abutment frame (42).

6. A screen printing device for circuit board processing according to claim 5, characterized in that: The inkjet printer further comprises a centralizing mechanism (6), wherein the centralizing mechanism (6) comprises electric push rods (61) respectively mounted on the mounting frames (22) on both sides, and an arc-shaped plate (62) for pushing the ink to centralize is provided on the telescopic end of the electric push rod (61).

7. A screen printing device for circuit board processing according to claim 6, characterized in that: The centralizing mechanism (6) further includes a limit plate (63), the arc plate (62) is slidably connected to the telescopic end corresponding to the electric push rod (61), and both ends of the arc plate (62) are hinged with a limit plate (63) that abuts and adapts to the mounting frame (22) on the same side.

8. A screen printing device for circuit board processing according to claim 7, characterized in that: The invention also includes a positioning mechanism (7), wherein the positioning mechanism (7) includes a guide plate (71) arranged on the workbench (1), a placement plate (72) is slidably provided on the guide plate (71), a right-angle plate (73) arranged along the circumferential direction is provided on the placement plate (72), and sleeve rings (74) are slidably provided on both sides of the guide plate (71) and are adapted to abut against the placement plate (72).

Images