A real-time monitoring device for printed circuit boards

Abstract

This utility model belongs to the field of circuit board printing technology, specifically a real-time monitoring device for circuit board printing. It includes a mounting frame with two guide rods symmetrically mounted on both sides. Sliding blocks are slidably mounted on the outer sides of each guide rod. A compression spring is fixed between one side of each sliding block and one side of the mounting frame. A storage cylinder is mounted on the top side of the sliding blocks. A rotating shaft is mounted on the output end of a drive motor, and a cam is mounted on the top of the rotating shaft. The storage cylinder is made of transparent material. When the drive motor starts, the rotating shaft at its output end drives the cam to rotate. The cam contacts the storage cylinder, causing the storage cylinder to move the sliding blocks along the guide rods and compress the compression springs. When the cam leaves the storage cylinder, the reaction force of the compression spring causes the storage cylinder to vibrate, ensuring the ink is evenly distributed within the storage cylinder, avoiding localized voids. This allows operators to visually monitor the ink level in real-time through the transparent storage cylinder.

Description

Technical Field

[0001] This utility model relates to the field of circuit board printing technology, specifically a real-time monitoring device for circuit board printing. Background Technology

[0002] In the process of circuit board printing, real-time monitoring of ink balance is crucial. When the ink balance is insufficient, the squeegee cannot spread the ink evenly, resulting in ink shortage in areas such as circuit board pads and circuits, leading to poor soldering and reduced printing quality. Therefore, a real-time monitoring device for circuit board printing is needed.

[0003] A Chinese patent with authorization announcement number CN117400620A discloses a double-sided screen printing device for circuit boards, including a base, a U-shaped slide rail fixedly connected to the base, a screen printing machine slidably connected to the U-shaped slide rail, a worktable fixedly connected to the base, and a flipping mechanism connected to the lower part of the screen printing machine that enables the circuit board to rotate. A clamping mechanism for fixing the circuit board is connected to the flipping mechanism. Under the action of a top plate and a push plate, the circuit board can be fixed on a mounting frame. When the screen printing machine rises, a first ratchet, in cooperation with a first gear and a first pawl, causes the mounting frame to flip, facilitating screen printing on the other side of the circuit board.

[0004] However, the above-mentioned device still has some problems. In practical applications, the ink in the storage cylinder forms local voids during the ink supply process, resulting in an uneven ink surface. This makes it impossible to detect insufficient ink in time, reducing the printing efficiency of the circuit board. Therefore, a real-time monitoring device for circuit board printing is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and solve the problems mentioned in the background art, this utility model proposes a real-time monitoring device for circuit board printing.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A real-time monitoring device for circuit board printing, comprising a workbench, two support columns symmetrically installed at the top edge of the workbench, a horizontal plate commonly installed at the top of the support columns, an installation frame installed on one side of the horizontal plate, two guide rods symmetrically installed between the two sides of the installation frame, sliding blocks slidably installed on the outer side of each guide rod, a compression spring fixedly connected between one side of each sliding block and one side of the installation frame, the compression spring being sleeved on the outer side of the guide rod, a storage cylinder commonly installed on the top side of each sliding block, and a drive mechanism installed at one end of the bottom side of the installation frame. The motor has a rotating shaft mounted on its output end, and a cam is mounted on the top of the rotating shaft. During operation, the cam contacts a transparent storage cylinder. Vibration of the storage cylinder ensures the ink is evenly distributed inside, preventing the formation of voids. The uniform ink distribution allows the operator to visually and in real-time monitor the ink level. When the ink level is low, the operator can add ink promptly, effectively preventing printing interruptions due to ink shortages and improving the continuity and efficiency of the printing operation.

[0007] Preferably, a cylinder is installed on the top side of the horizontal plate, and a U-shaped frame is installed on the working end of the cylinder. A printing screen is movably assembled inside the U-shaped frame. Threaded rods are installed through the four corners of the top side of the U-shaped frame, and pressing plates are installed on the bottom side of the threaded rods. When installing the printing screen, simply rotate the threaded rods to make the pressing plates fit tightly against the printing screen, thus achieving a firm fixation of the printing screen and ensuring that the printing screen will not shake or shift during the printing process, thereby guaranteeing the accuracy and clarity of the printed pattern.

[0008] Preferably, a support frame is installed on the top side of the U-shaped frame, a reciprocating motor is installed on one side of the support frame, a lead screw is installed at the output end of the reciprocating motor, a guide rod is fixed between the two sides of the support frame, a slider is slidably installed on the outer side of the guide rod, a screw hole is opened inside one side of the slider, one end of the lead screw passes through the screw hole and is rotatably installed inside one side of the support frame, two telescopic rods are symmetrically installed on the top side of the slider, and a squeegee is installed on the working end of the telescopic rod that extends to the bottom side of the slider. When the telescopic rod extends, the squeegee contacts the top side of the printing screen. The reciprocating motor drives the lead screw to rotate, and the slider will move back and forth in a straight line along the guide rod. Driven by the slider, the squeegee can evenly apply ink on the printing screen to realize the printing operation.

[0009] Preferably, an ink inlet pipe is connected to the top side of the storage cylinder, and a pump is installed on the outer side of the bottom end of the storage cylinder. The input end of the pump is connected to the bottom side of the storage cylinder, and the output end of the pump is connected to an ink outlet pipe. One end of the ink outlet pipe passes through the slider and is installed with a conveying pipe between the two doctor blades. The conveying pipe is arranged parallel to the doctor blades. When the printing operation starts, the pump starts and conveys the ink in the storage cylinder through the ink outlet pipe to the conveying pipe located between the two doctor blades. The ink then falls onto the metal screen through the conveying pipe. The fact that the conveying pipe is arranged parallel to the doctor blades ensures that the ink can be evenly distributed in front of the doctor blades, providing a stable ink source for the doctor blades to apply ink.

[0010] Preferably, the top side of the workbench is provided with a slide rail, and a slide plate is slidably installed inside the slide rail. A placement frame is installed on the top side of the slide plate. Two electric push rods are symmetrically installed on the top side of the workbench. A fixing plate is installed on the actuating end of the electric push rod. When it is necessary to print circuit boards of different sizes, simply slide the slide plate out of the slide rail, replace it with a placement frame of the appropriate size, and then slide the slide plate back into the slide rail. The electric push rods and fixing plates can stably fix the placement frames of different sizes.

[0011] Preferably, a control panel is installed on one side of the workbench, and the control panel is electrically connected to the electrical components inside the device, thereby realizing centralized control of the electrical components inside the device.

[0012] The advantages of this utility model are:

[0013] 1. When the drive motor of this utility model starts, the rotating shaft at its output end drives the cam to rotate. The cam contacts the storage cylinder, causing the storage cylinder to drive the sliding block to slide along the guide rod and squeeze the compression spring. When the cam leaves the storage cylinder, the reaction force of the compression spring causes the storage cylinder to vibrate, so that the ink is evenly spread in the storage cylinder, avoiding local voids. It is convenient for operators to visually monitor the ink level in real time through the transparent storage cylinder. When the ink level is lower than the preset scale, ink can be added in time through the ink inlet pipe to prevent printing interruption due to ink shortage.

[0014] 2. When different sizes of circuit boards need to be printed, the electric push rod retracts, loosens the fixing clamp, slides the slide plate off the worktable along the slide rail, removes the original placement frame, replaces it with a placement frame of the appropriate size, and then slides the slide plate back to the slide rail to ensure that the placement frame is in place. The electric push rod extends, driving the fixing clamp to clamp the two sides of the placement frame. By adjusting the extension and retraction of the electric push rod, it can adapt to placement frames of different widths, ensuring the stability of the placement frame and avoiding displacement during printing that affects the printing quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the intermediate axis side view of the present invention;

[0017] Figure 2 A schematic diagram of a partial structure at the top of a real-time printing monitoring device;

[0018] Figure 3 A schematic diagram of the structure for facilitating the monitoring of ink balance in the vibration assembly;

[0019] Figure 4 A schematic diagram of the top part of the printing real-time monitoring device from below.

[0020] Figure 5 This is a schematic diagram of the circuit board fixing assembly.

[0021] In the diagram: 1. Workbench; 2. Support column; 3. Horizontal plate; 4. Mounting frame; 5. Guide rod; 6. Sliding block; 7. Compression spring; 8. Storage cylinder; 9. Drive motor; 10. Rotating shaft; 11. Cam; 12. Cylinder; 13. U-shaped frame; 14. Printing screen; 15. Threaded rod; 16. Pressing plate; 17. Support frame; 18. Reciprocating motor; 19. Lead screw; 20. Smooth rod; 21. Slider; 22. Telescopic rod; 23. Doctor blade; 24. Ink inlet pipe; 25. Pump; 26. Ink outlet pipe; 27. Conveying pipe; 28. Slide rail; 29. ​​Slide plate; 30. Placement frame; 31. Electric push rod; 32. Fixing clamp; 33. Control panel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-4As shown, a real-time monitoring device for circuit board printing includes a workbench 1. Two support columns 2 are symmetrically installed on the top edge of the workbench 1. A horizontal plate 3 is installed on the top of the support columns 2. An installation frame 4 is installed on one side of the horizontal plate 3. Two guide rods 5 are symmetrically installed between the two sides of the installation frame 4. A sliding block 6 is slidably installed on the outer side of each guide rod 5. A compression spring 7 is fixed between one side of the sliding block 6 and one side of the installation frame 4. The compression spring 7 is sleeved on the outer side of the guide rod 5. A storage cylinder 8 is installed on the top side of the sliding block 6. A drive motor 9 is installed at one end of the bottom side of the installation frame 4. A rotating shaft 10 is installed at the output end of the drive motor 9. A cam 11 is installed at the top of the rotating shaft 10. The cam 11 will contact the storage cylinder 8 during operation. The storage cylinder 8 is made of transparent material.

[0024] The top side of the storage cylinder 8 is connected to an ink inlet pipe 24, and a pump 25 is installed on the outer side of the bottom end of the storage cylinder 8. The input end of the pump 25 is connected to the bottom side of the storage cylinder 8, and the output end of the pump 25 is connected to an ink outlet pipe 26. One end of the ink outlet pipe 26 passes through the slider 21 and is located between the two doctor blades 23. A conveying pipe 27 is installed thereon, and the conveying pipe 27 is arranged parallel to the doctor blades 23.

[0025] A control panel 33 is installed on one side of the workbench 1. The control panel 33 is electrically connected to the electrical components inside the device. During operation, in practical applications, the ink in the storage cylinder 8 forms local voids during the ink supply process, resulting in an uneven ink surface. This can lead to the inability to detect insufficient ink in time, reducing the printing efficiency of the circuit board. The ink is injected into the storage cylinder 8 through the ink inlet pipe 24. The drive motor 9 starts, and the rotating shaft 10 at its output end drives the cam 11 to rotate. The cam 11 contacts the storage cylinder 8, causing the storage cylinder 8 to drive the sliding block 6 to slide along the guide rod 5 and squeeze. The compression spring 7 causes the storage cylinder 8 to rebound under the reaction force of the compression spring 7 after the cam 11 leaves the storage cylinder 8. This process is repeated to ensure that the ink is evenly distributed in the storage cylinder 8, avoiding local voids. This allows the operator to visually monitor the ink level in real time through the transparent storage cylinder 8. When the ink level is lower than the preset mark, ink is added in time through the ink inlet pipe 24 to prevent printing interruption due to ink shortage. When printing is required, the pump 25 is started to draw the ink in the storage cylinder 8 from its bottom side and deliver it through the ink outlet pipe 26 and the conveying pipe 27 to the position located between the two doctor blades 23, providing a stable ink source for printing.

[0026] Please see Figure 1 , 2As shown in Figures 4 and 5, a cylinder 12 is installed on the top side of the horizontal plate 3, a U-shaped frame 13 is installed on the working end of the cylinder 12, a printing screen 14 is movably assembled inside the U-shaped frame 13, threaded rods 15 are installed through the four corners of the top side of the U-shaped frame 13, and a pressing plate 16 is installed on the bottom side of the threaded rods 15.

[0027] A support frame 17 is mounted on the top side of the U-shaped frame 13. A reciprocating motor 18 is mounted on one side of the support frame 17. A lead screw 19 is mounted on the output end of the reciprocating motor 18. A guide rod 20 is fixed between the two sides of the support frame 17. A slider 21 is slidably mounted on the outer side of the guide rod 20. A screw hole is opened inside one side of the slider 21. One end of the lead screw 19 passes through the screw hole and is rotatably mounted inside one side of the support frame 17. Two telescopic rods 22 are symmetrically mounted on the top side of the slider 21. The working end of the telescopic rod 22 extends movably to the bottom side of the slider 21, and a scraper 23 is mounted on each of them.

[0028] The workbench 1 has a slide rail 28 inside its top side, and a slide plate 29 is slidably installed inside the slide rail 28. A placement frame 30 is installed on the top side of the slide plate 29. Two electric push rods 31 are symmetrically installed on the top side of the workbench 1, and a fixing clamp 32 is installed on the actuating end of the electric push rod 31. During operation, the size of the circuit boards varies during the circuit board printing process. If it is not convenient to change to a placement frame 30 that matches the circuit board, the circuit board may shift in an unsuitable placement frame 30, affecting the printing quality of the circuit board. When different sizes need to be printed... When printing the circuit board, the electric push rod 31 retracts, loosens the fixing clamp 32, slides the slide plate 29 out of the worktable 1 along the slide rail 28, removes the original placement frame 30, replaces it with a placement frame 30 of the appropriate size, and then slides the slide plate 29 back to the slide rail 28 to ensure that the placement frame 30 is in place. The electric push rod 31 extends, driving the fixing clamp 32 to clamp the two sides of the placement frame 30. Through the extension and retraction adjustment of the electric push rod 31, it can adapt to placement frames 30 of different widths to ensure that the placement frame 30 is stable and avoids displacement during printing that affects the printing quality. The circuit board to be printed is placed in the appropriate placement frame 30.

[0029] Place the printing screen 14 inside the U-shaped frame 13, rotate the threaded rods 15 at the four corners of the top side of the U-shaped frame 13, so that the pressing plate 16 on the bottom side of the threaded rod 15 fits tightly against the printing screen 14, thereby firmly fixing the printing screen 14 and preventing it from shaking or shifting during the printing process.

[0030] The cylinder 12 is activated, causing its working end to extend. This causes the U-shaped frame 13 to move the printing screen 14 downwards, bringing it close to the circuit board to be printed. The telescopic rod 22 extends, causing the squeegee 23 to contact the top surface of the printing screen 14. The reciprocating motor 18 is activated, and its output end drives the lead screw 19 to rotate, causing the slider 21 to reciprocate linearly along the guide rod 20. The slider 21 drives the squeegee 23 to move at a constant speed on the printing screen 14, evenly applying and pressing the ink through the cutouts of the screen to form a printed pattern on the circuit board, thus realizing the printing operation on the circuit board.

[0031] Working principle: When different sizes of circuit boards need to be printed, the electric push rod 31 retracts, loosens the fixing clamp 32, slides the slide plate 29 out of the worktable 1 along the slide rail 28, removes the original placement frame 30, replaces it with a placement frame 30 of the appropriate size, and then slides the slide plate 29 back to the slide rail 28 to ensure that the placement frame 30 is in place. The electric push rod 31 extends, driving the fixing clamp 32 to clamp the two sides of the placement frame 30. Through the extension and retraction adjustment of the electric push rod 31, it can adapt to placement frames 30 of different widths, ensuring that the placement frame 30 is stable and avoiding displacement during printing that affects the printing quality. The circuit board to be printed is placed in the appropriate placement frame 30.

[0032] Place the printing screen 14 inside the U-shaped frame 13, rotate the threaded rods 15 at the four corners of the top side of the U-shaped frame 13, so that the pressing plate 16 on the bottom side of the threaded rod 15 fits tightly against the printing screen 14, thereby firmly fixing the printing screen 14 and preventing it from shaking or shifting during the printing process.

[0033] When printing is required, the pump 25 is started, drawing the ink from the bottom of the storage cylinder 8 and transporting it through the ink outlet pipe 26 and the delivery pipe 27 to the position located between the two doctor blades 23, providing a stable ink source for printing.

[0034] The cylinder 12 is activated, causing its working end to extend, which in turn causes the U-shaped frame 13 to move the printing screen 14 downward, bringing the printing screen 14 close to the circuit board to be printed. The telescopic rod 22 extends, causing the squeegee 23 to contact the top surface of the printing screen 14. The reciprocating motor 18 is activated, and its output end drives the lead screw 19 to rotate, causing the slider 21 to reciprocate in a straight line along the guide rod 20. The slider 21 drives the squeegee 23 to move at a constant speed on the printing screen 14, evenly applying and squeezing the ink through the cutout part of the screen to form a printed pattern on the circuit board, thus realizing the printing operation on the circuit board.

[0035] During printing, ink is injected into the storage cylinder 8 through the ink inlet pipe 24. The drive motor 9 starts, and the rotating shaft 10 at its output end drives the cam 11 to rotate. The cam 11 contacts the storage cylinder 8, causing the storage cylinder 8 to drive the sliding block 6 to slide along the guide rod 5 and compress the compression spring 7. When the cam 11 leaves the storage cylinder 8, the storage cylinder 8 rebounds under the reaction force of the compression spring 7. This process is repeated to ensure that the ink is evenly distributed in the storage cylinder 8, avoiding local voids. This allows the operator to visually monitor the ink level in real time through the transparent storage cylinder 8. When the ink level is lower than the preset mark, ink is added in time through the ink inlet pipe 24 to prevent printing interruption due to ink shortage.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A real-time monitoring device for printed circuit boards, characterized in that: The system includes a workbench (1), on which two support columns (2) are symmetrically installed at the top edge. A horizontal plate (3) is installed at the top of the support columns (2). A mounting frame (4) is installed on one side of the horizontal plate (3). Two guide rods (5) are symmetrically installed between the two sides of the mounting frame (4). Sliding blocks (6) are slidably installed on the outer side of each guide rod (5). A compression spring (7) is fixed between one side of the sliding block (6) and one side of the mounting frame (4). The compression spring (7) is sleeved on the outer side of the guide rod (5). A storage cylinder (8) is installed on the top side of the sliding block (6). A drive motor (9) is installed at one end of the bottom side of the mounting frame (4). A rotating shaft (10) is installed at the output end of the drive motor (9). A cam (11) is installed at the top of the rotating shaft (10). The cam (11) will contact the storage cylinder (8) during operation. The storage cylinder (8) is made of transparent material.

2. The circuit board printing real-time monitoring device according to claim 1, characterized in that: A cylinder (12) is installed on the top side of the horizontal plate (3). A U-shaped frame (13) is installed on the working end of the cylinder (12). A printing screen (14) is movably assembled inside the U-shaped frame (13). Threaded rods (15) are installed through the four corners of the top side of the U-shaped frame (13). A pressing plate (16) is installed on the bottom side of the threaded rods (15).

3. The circuit board printing real-time monitoring device according to claim 2, characterized in that: A support frame (17) is installed on the top side of the U-shaped frame (13). A reciprocating motor (18) is installed on one side of the support frame (17). A lead screw (19) is installed at the output end of the reciprocating motor (18). A smooth rod (20) is fixed between the two sides of the support frame (17). A slider (21) is slidably installed on the outside of the smooth rod (20). A screw hole is opened inside one side of the slider (21). One end of the lead screw (19) passes through the screw hole and is rotatably installed inside one side of the support frame (17). Two telescopic rods (22) are symmetrically installed on the top side of the slider (21). The working end of the telescopic rod (22) moves through to the bottom side of the slider (21) and a scraper (23) is installed on each.

4. The circuit board printing real-time monitoring device according to claim 3, characterized in that: The top side of the storage cylinder (8) is connected to an ink inlet pipe (24), and a pump (25) is installed on the outer side of the bottom end of the storage cylinder (8). The input end of the pump (25) is connected to the bottom side of the storage cylinder (8), and the output end of the pump (25) is connected to an ink outlet pipe (26). One end of the ink outlet pipe (26) passes through the slider (21) and is located in the middle of the two doctor blades (23) and is equipped with a conveying pipe (27). The conveying pipe (27) is arranged parallel to the doctor blades (23).

5. A real-time monitoring device for circuit board printing according to claim 4, characterized in that: The top side of the workbench (1) is provided with a slide rail (28), and a slide plate (29) is slidably installed inside the slide rail (28). A placement frame (30) is installed on the top side of the slide plate (29). Two electric push rods (31) are symmetrically installed on the top side of the workbench (1). A fixing clamp (32) is installed on the working end of the electric push rod (31).

6. A real-time monitoring device for circuit board printing according to claim 5, characterized in that: A control panel (33) is installed on one side of the workbench (1), and the control panel (33) is electrically connected to the electrical components inside the device.

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