Rapid cleaning device for surface of SMT (Surface Mount Technology) steel mesh

Abstract

The utility model relates to the technical field of SMT steel mesh cleaning, and discloses an SMT steel mesh surface rapid cleaning device which comprises a cleaning table, the top of the cleaning table is fixedly connected with a protective shell and a circular ring block, the top of the circular ring block is rotationally connected with a cleaning disc, and the interior of the cleaning disc is fixedly connected with a rotating shaft. And a mounting frame is fixedly connected to the top of the cleaning table and located in the circular ring block, and a driving box is fixedly connected to the top of the mounting frame. Through cooperative use of the rotating shaft, the cleaning disc, the circular ring block, the driving assembly and other structures, the conveying path and position of a steel mesh can be accurately controlled through a meshing mechanism of a pin and a grooved wheel, and therefore the phenomenon of uneven cleaning caused by unstable conveying is effectively avoided, and the conveying efficiency is improved. The steel mesh is always kept stable in the cleaning process, it is ensured that all positions can be evenly cleaned, the cleaning efficiency is improved, and the requirement for manual intervention is reduced.

Description

Technical Field

[0001] This utility model relates to the field of SMT stencil cleaning technology, and in particular to a rapid cleaning device for the surface of SMT stencils. Background Technology

[0002] With the continuous development of the electronics manufacturing industry, SMT (Surface Mount Technology) has gradually become the mainstream technology for electronic component production. In the SMT production process, the stencil, as a key production tool, plays a crucial role in evenly applying solder paste to the PCB board. As production progresses, a large amount of solder residue, oxides, and other impurities accumulate on the stencil. These residues can affect production efficiency and product quality, and even lead to circuit board defects. Therefore, stencil surface cleaning has become an indispensable part of the SMT production process.

[0003] For example, Chinese utility model patent application number 201921353901.3 discloses a rapid cleaning device for SMT stencil surfaces, including a cleaning table. A base is fixedly installed at the bottom of the cleaning table, and a groove is formed on the inner wall of the base. A hydraulic column is fixedly installed on the inner wall of the groove. This utility model's rapid cleaning device for SMT stencil surfaces effectively avoids the mixing of water and debris. Wastewater flows into a collection bag. Two of the four installed bases on the front and same side have hydraulic columns installed inside, while the other two do not. Therefore, activating the hydraulic rods tilts the cleaning table, allowing water to be quickly drained into a collection bag, resulting in faster stencil drying. The stencil is placed below four pressure plates and above a fixed baffle. The downward pressure of a first spring ensures the four corners of the stencil are securely installed, preventing violent shaking during cleaning and accelerating the cleaning process.

[0004] Traditional stencil cleaning methods include manual cleaning, where operators wipe the stencil with lint-free cloths, alcohol, or stencil cleaner. However, these methods are inefficient and pose safety hazards, especially in large-scale production. Achieving fast and efficient cleaning of stencils has become crucial for improving production line efficiency and reducing production costs. Existing automatic cleaning devices are mostly static or require frequent manual adjustments, resulting in long cleaning cycles and errors during the cleaning process. This leads to compromised stencil precision and ultimately affects the final production quality. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid cleaning device for SMT stencil surfaces.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a rapid cleaning device for SMT stencil surfaces, comprising a cleaning table, a protective shell and a circular block fixedly connected to the top of the cleaning table, a cleaning disc rotatably connected to the top of the circular block, a rotating shaft fixedly connected inside the cleaning disc, a mounting frame fixedly connected to the top of the cleaning table and inside the circular block, a drive box fixedly connected to the top of the mounting frame, a drive assembly capable of driving the rotating shaft to rotate provided on the inner top surface of the drive box, and two [unclear - possibly related to a specific device or component] fixedly connected to the top of the cleaning table and inside the protective shell. The support rods have a support plate fixedly connected to their tops. A cylinder is fixedly installed on the top of the support plate. The telescopic end of the cylinder passes through the support plate and is fixedly connected to a cleaning frame. A moving component is provided on one side of the cleaning frame. Two guide rods are fixedly connected between the two sides of the inner wall of the cleaning frame. A moving block is slidably connected to the outer walls of the two guide rods. Several nozzles are fixedly connected to the bottom of the moving block. A pumping component is provided on the inner bottom surface of the cleaning platform. L-shaped plates are fixedly connected to both sides of the moving block. A cleaning component is provided on one side of one of the L-shaped plates.

[0007] The top of the rotating shaft is rotatably connected to the bottom of the support plate. The top of the cleaning plate is equipped with four cleaning frames for placing steel mesh. The cleaning platform serves as the main frame of the equipment, supporting the mechanical and electrical systems for the entire steel mesh cleaning process. There are control buttons on the front and safety valves, controllers, and other equipment on one side. The protective shell covers the cleaning area to prevent cleaning liquid splashing and external contamination. The internal baffle is made of transparent acrylic material, which facilitates observation of the cleaning process and reduces noise and safety hazards. The circular block supports the rotation of the cleaning plate and, together with the drive component, realizes the indexing and conveying of the steel mesh. The cylinder precisely controls the contact pressure between the cleaning brush and the surface of the steel mesh to avoid tension loss. The support rod limits the lateral displacement of the cleaning frame. The nozzle has built-in micro-orifice nozzles located inside the two cleaning brushes, spraying cleaning liquid while using the cleaning brushes to block splashing.

[0008] As a further description of the above technical solution:

[0009] The drive assembly includes a drive motor fixedly installed on the top surface inside the drive housing, and the output end of the drive motor extends through to the outside of the drive housing and is fixedly connected to a drive disk.

[0010] The drive motor controls the rotation speed and angle of the drive disc, providing indexing power to achieve precise stepping of the cleaning disc. A single pin is fixed on the top of the drive disc, engaging the grooved wheel once per revolution.

[0011] As a further description of the above technical solution:

[0012] A pin is fixedly connected to the top of the drive disk, and a grooved wheel is engaged with the outer wall of the pin.

[0013] The interior of the grooved wheel is fixedly connected to the drive shaft. The four-groove design of the grooved wheel, in conjunction with the pin, completes the indexing. The continuous rotation of the drive disc is converted into the intermittent indexing motion of the cleaning disc by the 90° indexing angle of the four-groove grooved wheel.

[0014] As a further description of the above technical solution:

[0015] The moving component includes a servo motor fixedly installed on one side of the cleaning frame, the output end of which extends through the interior of the cleaning frame and is fixedly connected to a lead screw.

[0016] One end of the lead screw is fixedly connected to the inner wall of the cleaning frame, and the outer wall of the lead screw is threadedly connected to the moving block. The guide rod ensures that the movement trajectory of the nozzle and the cleaning brush is parallel to the surface of the steel mesh.

[0017] As a further description of the above technical solution:

[0018] The pumping assembly includes a delivery pump fixedly installed on the bottom surface of the cleaning platform, and the outlet end of the delivery pump is fixedly connected to a hose.

[0019] One end of the hose extends into the interior of the movable block and is fixedly connected to several nozzles. The delivery pump is a high-pressure diaphragm pump that delivers water-based cleaning fluid.

[0020] As a further description of the above technical solution:

[0021] The cleaning assembly includes a synchronous motor fixedly mounted on one side of one of the L-shaped plates via a support plate, and the output end of the synchronous motor is fixedly connected to a main synchronous pulley.

[0022] The synchronous motor drives the main synchronous pulley, which in turn drives the auxiliary synchronous pulley via a synchronous belt with a 1:1 transmission ratio.

[0023] As a further description of the above technical solution:

[0024] The outer wall of the main synchronous pulley is connected to the auxiliary synchronous pulley via a synchronous belt drive. Cleaning brushes are fixedly connected to one side of both the main synchronous pulley and the auxiliary synchronous pulley via a rotating shaft.

[0025] One end of the cleaning brush is rotatably connected to one side of another L-shaped plate. The cleaning brush is made of nylon composite bristles and coated with a tungsten carbide wear-resistant layer to remove solder paste residue from the surface of the stencil and protect the mesh structure.

[0026] As a further description of the above technical solution:

[0027] Two limiting rods are fixedly installed on the top of the cleaning rack.

[0028] The outer wall of the limiting rod slides through to the top of the support plate. The limiting rod consists of two chrome-plated steel rods, which limit the vertical movement trajectory of the cleaning frame and prevent uneven wear of the bristles caused by off-center loading.

[0029] This utility model has the following beneficial effects:

[0030] 1. Compared with existing technologies, this SMT stencil surface rapid cleaning device, through the coordinated use of structures such as rotating shaft, cleaning disc, circular block and drive assembly, can precisely control the conveying path and position of the stencil through the engagement mechanism of pin and groove wheel. This effectively avoids uneven cleaning caused by unstable conveying, ensuring that the stencil remains stable during the cleaning process, ensuring that every position is cleaned evenly, improving cleaning efficiency and reducing the need for manual intervention.

[0031] 2. Compared with existing technologies, this SMT stencil surface rapid cleaning device, through the coordinated use of cylinders, moving blocks, moving components, and cleaning components, ensures uniform and thorough cleaning of the stencil surface through multiple cleaning mechanisms such as cleaning brushes, nozzles, and synchronous wheels. It effectively removes stains and residues from the stencil surface. At the same time, the spraying of cleaning fluid from the nozzles increases the cleaning effect and avoids splashing, ensuring the safety and cleanliness of the cleaning process. It saves a lot of time compared to manual cleaning, reduces labor intensity, and avoids the instability and inaccuracy of manual operation. Attached Figure Description

[0032] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model;

[0033] Figure 2 This is a three-dimensional schematic diagram of the pumping component structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model;

[0034] Figure 3 This is a three-dimensional schematic diagram of the cleaning tray structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model;

[0035] Figure 4 This is a three-dimensional schematic diagram of the drive component structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model;

[0036] Figure 5 This is a three-dimensional schematic diagram of the moving component structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model;

[0037] Figure 6 This is a three-dimensional schematic diagram of the cleaning component structure of a rapid cleaning device for SMT stencil surfaces proposed in this utility model.

[0038] Legend:

[0039] 1. Cleaning table; 2. Protective shell; 3. Circular block; 4. Cleaning tray; 5. Rotating shaft; 6. Mounting frame; 7. Drive box; 8. Support rod; 9. Support plate; 10. Cylinder; 11. Cleaning frame; 12. Guide rod; 13. Moving block; 14. Nozzle; 15. L-shaped plate; 16. Drive motor; 17. Drive plate; 18. Pin; 19. Grooved wheel; 20. Servo motor; 21. Lead screw; 22. Conveyor pump; 23. Hose; 24. Synchronous motor; 25. Main synchronous pulley; 26. Secondary synchronous pulley; 27. Cleaning brush; 28. Limiting rod. Detailed Implementation

[0040] 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 protection scope of the present utility model.

[0041] Reference Figure 1-6This utility model provides a rapid cleaning device for SMT stencil surfaces: It includes a cleaning table 1, a protective shell 2 and a circular block 3 fixedly connected to the top of the cleaning table 1, a cleaning disc 4 rotatably connected to the top of the circular block 3, a rotating shaft 5 fixedly connected inside the cleaning disc, a mounting frame 6 fixedly connected to the top of the cleaning table 1 and inside the circular block 3, a drive box 7 fixedly connected to the top of the mounting frame 6, a drive assembly capable of driving the rotating shaft 5 to rotate provided on the inner top surface of the drive box 7, and two support rods 8 fixedly connected to the top of the cleaning table 1 and inside the protective shell 2, the tops of the two support rods 8 being jointly fixedly connected... A support plate 9 is attached, and a cylinder 10 is fixedly installed on the top of the support plate 9. The telescopic end of the cylinder 10 passes through the support plate 9 and is fixedly connected to a cleaning frame 11. A moving component is provided on one side of the cleaning frame 11. Two guide rods 12 are fixedly connected between the two sides of the inner wall of the cleaning frame 11. A moving block 13 is slidably connected to the outer wall of the two guide rods 12. Several nozzles 14 are fixedly connected to the bottom of the moving block 1. A pumping component is provided on the inner bottom surface of the cleaning platform 1. L-shaped plates 15 are fixedly connected to both sides of the moving block 13. A cleaning component is provided on one side of one of the L-shaped plates 15. The top of the rotating shaft is connected to the bottom of the support plate 9. The unit features a rotating connection, with four cleaning frames on top of the cleaning disc for holding steel mesh. The cleaning platform 1 serves as the main frame of the equipment, supporting the mechanical and electrical systems for the entire steel mesh cleaning process. Control buttons are located on the front, and safety valves and controllers are on one side. A protective shell 2 covers the cleaning area to prevent cleaning fluid splashes and external contamination. Its internal baffles are made of transparent acrylic material, facilitating observation of the cleaning process while reducing noise and safety hazards. A circular block 3 supports the rotation of the cleaning disc 4, working in conjunction with the drive assembly to achieve indexing and conveying of the steel mesh. A cylinder 10 precisely controls the contact pressure between the cleaning brush 27 and the steel mesh surface, preventing tension loss. The support rod 8 restricts the lateral displacement of the cleaning frame 11. The nozzle 14 has a built-in micro-orifice nozzle located inside the two cleaning brushes 27. While spraying the cleaning liquid, the cleaning brushes 27 block splashes. Through the coordinated use of structures such as the rotating shaft 5, cleaning disc 4, annular block 3 and drive assembly, the conveying path and position of the steel mesh can be precisely controlled through the meshing mechanism of the pin 18 and the groove wheel 19. This effectively avoids uneven cleaning caused by unstable conveying, ensuring that the steel mesh remains stable during the cleaning process and that each position is cleaned evenly, thus improving cleaning efficiency and reducing the need for manual intervention.

[0042] The drive assembly includes a drive motor 16 fixedly installed on the top surface inside the drive housing 7. The output end of the drive motor 16 extends to the outside of the drive housing 7 and is fixedly connected to a drive disk 17. The drive motor 16 controls the rotation speed and angle of the drive disk 17, providing indexing power to achieve precise stepping of the cleaning disk 4. A single pin 18 is fixedly fixed on the top of the drive disk 17, engaging a grooved wheel 19 once per revolution. The pin 18 is fixedly connected to the top of the drive disk 17, and the outer wall of the pin 18 engages with the grooved wheel 19. The interior of the grooved wheel 19 is fixedly connected to the drive shaft. The four-groove design of the grooved wheel 19 cooperates with the pin 18 to complete the indexing. The continuous rotation of the drive disk 17 is converted into the intermittent indexing motion of the cleaning disk 4 through the 90° indexing angle of the four-groove grooved wheel 19.

[0043] The moving component includes a servo motor 20 fixedly installed on one side of the cleaning frame 11. The output end of the servo motor 20 extends into the interior of the cleaning frame 11 and is fixedly connected to a lead screw 21. One end of the lead screw 21 is fixedly connected to the inner wall of the cleaning frame 11, and the outer wall of the lead screw 21 is threadedly connected to the moving block 13. The guide rod 12 ensures that the moving trajectory of the nozzle 14 and the cleaning brush 27 is parallel to the surface of the steel mesh.

[0044] The pumping assembly includes a delivery pump 22 fixedly installed on the bottom surface of the cleaning platform 1. The outlet end of the delivery pump 22 is fixedly connected to a hose 23. One end of the hose 23 passes through the interior of the movable block 13 and is fixedly connected to several nozzles 14. The delivery pump 22 is a high-pressure diaphragm pump that delivers water-based cleaning fluid.

[0045] The cleaning assembly includes a synchronous motor 24 fixedly mounted on one side of one of the L-shaped plates 15 via a support plate. The output end of the synchronous motor 24 is fixedly connected to a main synchronous pulley 25. The synchronous motor 24 drives the main synchronous pulley 25 and drives the auxiliary synchronous pulley 26 through a synchronous belt transmission ratio of 1:1. The outer wall of the main synchronous pulley 25 is connected to the auxiliary synchronous pulley 26 through a synchronous belt transmission. A cleaning brush 27 is fixedly connected to one side of both the main synchronous pulley 25 and the auxiliary synchronous pulley 26 via a rotating shaft. One end of the cleaning brush 27 is rotatably connected to one side of the other L-shaped plate 15. The cleaning brush 27 is made of nylon composite bristles and coated with a tungsten carbide wear-resistant layer to remove solder paste residue from the surface of the stencil and protect the mesh structure.

[0046] Two limiting rods 28 are fixedly installed on the top of the cleaning frame 11. The outer wall of the limiting rods 28 slides through to the top of the support plate 9. The limiting rods 28 are two chrome-plated steel rods that limit the vertical movement trajectory of the cleaning frame 11 and prevent uneven wear of the bristles caused by off-center loading.

[0047] Working principle: First, before use, connect the device to an external power source. Then, the operator places the steel mesh to be cleaned into the pre-set frame on the cleaning tray 4. Then, the control button on the front of the cleaning table 1 can be activated, which powers the drive motor 16, causing its output end to rotate and drive the drive disc 17 to rotate. This, in turn, drives the pins 18 on the drive disc 17 to rotate. When the drive disc 17 rotates, the pins 18 engage with the grooved wheel 19, thereby driving the rotating shaft 5 to rotate. This, in turn, causes the cleaning tray 4 to rotate. As the drive disc 17 rotates one revolution through the four grooves on the grooved wheel 19, the grooved wheel 19 rotates one-quarter revolution, thus fitting into the frame on the cleaning tray 4 where the steel mesh is placed. This precisely controls the conveying path and position of the steel mesh, ensuring stable position during each cleaning process and avoiding uneven cleaning caused by unstable conveying.

[0048] When the steel mesh moves to the lower position of the cleaning frame 11, the drive motor 16 is turned off, and then the cylinder 10 is started. The telescopic end extends and retracts, causing the cleaning frame 11 to move down along the limiting rod 28, so that the bristles on the surface of the cleaning brush 27 come into contact with the steel mesh. At this time, the synchronous motor 24 is started, and its output end drives the main synchronous pulley 25 to rotate. Then, under the action of the synchronous belt, the auxiliary synchronous belt rotates synchronously. Through the rotation of the two synchronous pulleys, the cleaning brush 27 rotates, so that the surface bristles clean the surface of the steel mesh. Then, the conveyor is moved in advance. The inlet of pump 22 is connected to the cleaning fluid, and then the delivery pump 22 is started to draw the cleaning fluid into the hose 23. The fluid is then sprayed out from inside the two cleaning brushes 27 through the nozzle 14, providing a better cleaning effect while preventing the cleaning fluid from splashing due to the obstruction of the cleaning brushes 27. Then the servo motor 20 is started, and its output end rotates to drive the lead screw 21 to rotate, so that the moving block 13 can move along the guide rod 12. This allows the cleaning brushes 27 and the nozzle 14 to clean the surface of the steel mesh, ensuring a uniform cleaning effect without dead corners.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid cleaning device for SMT stencil surfaces, comprising a cleaning table (1), characterized in that: The top of the cleaning platform (1) is fixedly connected to a protective shell (2) and a circular block (3). A cleaning disc (4) is rotatably connected to the top of the circular block (3). A rotating shaft (5) is fixedly connected inside the cleaning disc. A mounting frame (6) is fixedly connected to the top of the cleaning platform (1) and inside the circular block (3). A drive box (7) is fixedly connected to the top of the mounting frame (6). A drive assembly capable of driving the rotating shaft (5) is provided on the inner top surface of the drive box (7). Two support rods (8) are fixedly connected to the top of the cleaning platform (1) and inside the protective shell (2). A support disc (9) is fixedly connected to the top of the two support rods (8). A cylinder (10) is fixedly installed on the top of the support plate (9). The telescopic end of the cylinder (10) passes through the support plate (9) and is fixedly connected to a cleaning frame (11). A moving component is provided on one side of the cleaning frame (11). Two guide rods (12) are fixedly connected between the two sides of the inner wall of the cleaning frame (11). A moving block (13) is slidably connected to the outer wall of the two guide rods (12). Several nozzles (14) are fixedly connected to the bottom of the moving block (13). A pumping component is provided on the inner bottom surface of the cleaning platform (1). L-shaped plates (15) are fixedly connected to both sides of the moving block (13). A cleaning component is provided on one side of one of the L-shaped plates (15).

2. The SMT stencil surface rapid cleaning device according to claim 1, characterized in that: The drive assembly includes a drive motor (16) fixedly installed on the top surface inside the drive housing (7), and the output end of the drive motor (16) extends through to the outside of the drive housing (7) and is fixedly connected to a drive disk (17).

3. The SMT stencil surface rapid cleaning device according to claim 2, characterized in that: A pin (18) is fixedly connected to the top of the drive disk (17), and a grooved wheel (19) is engaged with the outer wall of the pin (18). The interior of the grooved wheel (19) is fixedly connected to the drive shaft.

4. The SMT stencil surface rapid cleaning device according to claim 1, characterized in that: The moving component includes a servo motor (20) fixedly installed on one side of the cleaning frame (11). The output end of the servo motor (20) extends into the interior of the cleaning frame (11) and is fixedly connected to a lead screw (21). One end of the lead screw (21) is fixedly connected to the inner wall of the cleaning frame (11), and the outer wall of the lead screw (21) is threadedly connected to the moving block (13).

5. The SMT stencil surface rapid cleaning device according to claim 1, characterized in that: The pumping assembly includes a delivery pump (22) fixedly installed on the bottom surface of the cleaning platform (1). The outlet end of the delivery pump (22) is fixedly connected to a hose (23). One end of the hose (23) passes through the interior of the moving block (13) and is fixedly connected to several nozzles (14).

6. The SMT stencil surface rapid cleaning device according to claim 1, characterized in that: The cleaning assembly includes a synchronous motor (24) fixedly mounted on one side of one of the L-shaped plates (15) via a support plate, and the output end of the synchronous motor (24) is fixedly connected to a main synchronous pulley (25).

7. The SMT stencil surface rapid cleaning device according to claim 6, characterized in that: The outer wall of the main synchronous pulley (25) is connected to the auxiliary synchronous pulley (26) via a synchronous belt drive. A cleaning brush (27) is fixedly connected to one side of both the main synchronous pulley (25) and the auxiliary synchronous pulley (26) via a rotating shaft. One end of the cleaning brush (27) is rotatably connected to one side of another L-shaped plate (15).

8. The SMT stencil surface rapid cleaning device according to claim 1, characterized in that: Two limiting rods (28) are fixedly installed on the top of the cleaning rack (11), and the outer wall of the limiting rods (28) slides through to the top of the support plate (9).

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