Automatic hot washing device before zinc spraying of multilayer circuit board

Abstract

The application relates to the technical field of multilayer circuit board cleaning, in particular to a multilayer circuit board automatic hot washing device before zinc spraying, which comprises a dynamic heating assembly, a cleaning liquid circulating system, a circuit board supporting assembly and a vibration auxiliary module. The dynamic heating assembly uniformly heats the cleaning liquid through the rotation of the arc-shaped heating pipe; the cleaning liquid circulating system ensures full coverage of the cleaning liquid by using a flow guide plate and an adjustable nozzle; the circuit board supporting assembly fixes the circuit board by adopting a grid frame and elastic clamping pieces; and the vibration auxiliary module enhances the cleaning effect through high-frequency vibration. The application can solve the problems of uneven temperature, poor flowability and cleaning blind spots of the cleaning liquid, significantly improve the cleaning efficiency and quality, and has compact structure and high practicability, and is suitable for promotion.

Description

Technical Field

[0001] This utility model belongs to the field of electronic manufacturing and surface treatment technology, specifically an automatic hot washing device for multilayer circuit boards before zinc spraying. Background Technology

[0002] To improve the surface treatment quality of multilayer circuit boards and ensure the adhesion and uniformity of the zinc spraying process, a hot washing treatment is required before zinc spraying. Hot washing involves heating a cleaning solution and using mechanical motion to remove impurities, oxides, and oil from the circuit board surface, similar to using hot water and a brush to remove stubborn stains when washing dishes. During processing, multilayer circuit boards undergo multiple pressing and etching processes, leaving organic matter or tiny particles on their surface. These residues directly affect the quality of the subsequent zinc spraying layer. Existing hot washing equipment typically operates in two stages: the first stage involves immersing the circuit board in a heated cleaning tank to soften and remove surface deposits; the second stage involves further cleaning the circuit board surface using spraying or brushing components to remove stubborn residues. However, in the first stage, when the circuit board is immersed in the cleaning tank, the temperature distribution of the cleaning solution is often uneven and the fluidity of the cleaning solution is poor, resulting in some areas of residue not being completely removed. Furthermore, the existing hot cleaning device has a relatively simple structure, and the heating elements in the cleaning tank are generally fixed. This causes cleaning blind spots in local areas if the circuit board is large or has a complex shape, affecting the overall cleaning effect. Therefore, improvements are urgently needed. Utility Model Content

[0003] This utility model proposes an automatic hot cleaning device for multi-layer circuit boards before zinc spraying, which has the advantages of uniform cleaning, high efficiency, and compact structure, and solves the problems of uneven temperature distribution, poor fluidity, and blind spots in the cleaning solution in the prior art. To achieve the above objectives, this utility model adopts the following technical solution: An automatic hot cleaning device for multi-layer circuit boards before zinc spraying, including a cleaning tank body and a control system, and further including:

[0004] Dynamic heating components

[0005] The dynamic heating assembly includes a heating tube group and a rotary drive mechanism. The heating tube group consists of several arc-shaped heating tubes. The two ends of each arc-shaped heating tube are mounted on the inner wall of the cleaning tank body through fixed brackets, and the arc-shaped heating tubes are arranged in a spiral shape along the axial direction of the cleaning tank body. The rotary drive mechanism includes a motor and a transmission gear. The output shaft of the motor is fixedly connected to a drive gear, which meshes with a driven gear ring set on the outer side of the arc-shaped heating tube, thereby driving the arc-shaped heating tube to rotate around the central axis of the cleaning tank body.

[0006] Cleaning fluid circulation system

[0007] The cleaning fluid circulation system includes a circulation pump, a guide plate, and a spray head assembly. The inlet of the circulation pump is connected to the outlet at the bottom of the cleaning tank body via a pipe, and the outlet of the circulation pump is connected to the spray head assembly via a diversion pipe. The guide plate is fixedly installed on the inner wall of the cleaning tank body, and multiple sets of inclined guide grooves are formed on the surface of the guide plate. The opening direction of the guide grooves forms a certain angle with the central axis of the cleaning tank body to guide the cleaning fluid to flow along a predetermined path. The spray head assembly includes multiple adjustable-angle nozzles, each nozzle is connected to the diversion pipe via a ball joint connector, and the spray direction of the nozzles can be adjusted as needed.

[0008] Circuit board support components

[0009] The circuit board support assembly includes a support frame and a clamping mechanism. The support frame is formed by multiple horizontal and vertical bars connected in an alternating grid structure. The bottom of the support frame is slidably connected to the inner wall of the cleaning tank body via a slide rail. Limit blocks are provided at both ends of the slide rail to limit the movement range of the support frame. The clamping mechanism includes multiple elastic clamps. Each elastic clamp is connected to a horizontal bar of the support frame via a spring. Anti-slip pads are provided on the inner side of the elastic clamps to fix the circuit board and prevent it from shifting during the cleaning process.

[0010] Vibration auxiliary module

[0011] The vibration auxiliary module includes a vibrator and a vibration transmission plate. The vibrator is fixedly installed on the outer wall of the main body of the cleaning tank, and the vibration transmission plate is fixedly connected to the inner wall of the main body of the cleaning tank by bolts. The surface of the vibration transmission plate is provided with multiple sets of protruding structures. The protruding structures are hemispherical in shape to enhance the turbulence effect of the cleaning fluid. The vibrator is connected to the power supply through the frequency adjustment module of the control system. The frequency adjustment module can adjust the working frequency of the vibrator according to the cleaning requirements.

[0012] This invention redesigns the layout of the heating element, enabling it to rotate synchronously with the flow of the cleaning fluid. An arc-shaped heating tube rotates around the central axis of the cleaning tank body, and its spiral arrangement uniformly heats the cleaning fluid. When the circuit board is placed inside the cleaning tank body, the cleaning fluid forms a vortex under the rotation of the arc-shaped heating tube, thus avoiding uneven temperature distribution in localized areas. Simultaneously, the rotation of the arc-shaped heating tube significantly enhances the fluidity of the cleaning fluid, allowing impurities and residues to be carried away more effectively, thereby improving the cleaning effect.

[0013] This invention also features a novel cleaning fluid circulation system. A circulation pump extracts the cleaning fluid from the bottom of the cleaning tank and delivers it to the spray head assembly. The guide channel on the guide plate guides the cleaning fluid to flow along a predetermined path, creating a stable circulation within the cleaning tank. The nozzles in the spray head assembly are angle-adjustable via ball joint connectors, allowing the spray direction to be adjusted according to the size and shape of the circuit board. This ensures that the cleaning fluid covers every corner of the circuit board, effectively eliminating blind spots in the cleaning process.

[0014] This invention further optimizes the support method for circuit boards. Through the grid structure of the support frame and the slide rail connection design, the circuit board can move freely within the main body of the cleaning tank. At the same time, the circuit board is fixed by the clamping action of the elastic clips to prevent it from shaking or tipping over during the cleaning process. The anti-slip pads on the inner side of the elastic clips can effectively reduce frictional damage to the surface of the circuit board, thereby protecting the integrity of the circuit board.

[0015] This invention also introduces a vibration-assisted module, which drives a vibration transmission plate to generate high-frequency vibration through a vibrator. The raised structure on the surface of the vibration transmission plate enhances the turbulence effect of the cleaning fluid, allowing the cleaning fluid to penetrate deeper into the tiny gaps in the circuit board, thereby further improving cleaning efficiency. The operating frequency of the vibrator can be adjusted by the frequency adjustment module of the control system to adapt to different cleaning needs.

[0016] This invention solves the problems of uneven temperature distribution, poor fluidity, and blind spots in cleaning fluid in the prior art through the synergistic effect of dynamic heating components, cleaning fluid circulation system, circuit board support components, and vibration auxiliary module. It significantly improves the cleaning quality and efficiency of multilayer circuit boards, while simplifying the overall structural design of the device and reducing manufacturing costs. It has high practicality and promotional value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout relationship of the main body of the cleaning tank, the dynamic heating component, the cleaning fluid circulation system, the circuit board support component, and the vibration auxiliary module.

[0018] Figure 2 This is a magnified view of a portion of the dynamic heating assembly, highlighting the spiral arrangement of the arc-shaped heating tubes and their connection structure with the rotary drive mechanism.

[0019] Figure 3 This is a schematic diagram of the cleaning fluid circulation system, showing the arrangement of the circulation pump, guide plate and spray head assembly, as well as the inclined design of the guide channel.

[0020] Figure 4 This is a top view of the circuit board support assembly, showing the grid structure of the support frame and the distribution of the elastic clips.

[0021] Figure 5 This is a partial sectional view of the vibration auxiliary module, showing the installation positions of the vibrator and vibration transmission plate, as well as the shape of the protruding structure.

[0022] Figure 6 This is a schematic diagram of the working state of this utility model, showing the overall operating state of the circuit board being cleaned in the cleaning tank.

[0023] The attached figures are labeled as follows:

[0024] 1. Cleaning tank body; 2. Arc-shaped heating tube; 3. Rotary drive mechanism; 4. Motor; 5. Drive gear; 6. Driven gear ring; 7. Circulation pump; 8. Guide plate; 9. Spray head assembly; 10. Support frame; 11. Elastic clamp; 12. Vibrator; 13. Vibration transmission plate; 14. Raised structure; 15. Slide rail; 16. Limiting block. Detailed Implementation

[0025] This utility model provides an automatic hot washing device for multilayer circuit boards before zinc spraying, the specific implementation of which is as follows. Figure 1 As shown, the device mainly includes a cleaning tank body 1, a dynamic heating component, a cleaning fluid circulation system, a circuit board support component, and a vibration auxiliary module. The cleaning tank body 1 is the core load-bearing component of the entire device. Its internal space is used to accommodate the cleaning fluid and the multi-layer circuit boards to be cleaned, while the various functional modules are installed inside and outside the cleaning tank body 1 according to a specific layout.

[0026] The dynamic heating assembly includes an arc-shaped heating tube 2 and a rotary drive mechanism 3, such as Figure 2 As shown. The arc-shaped heating tube 2 consists of several spirally arranged arc-shaped tubes. Each arc-shaped heating tube 2 is fixedly installed on the inner wall of the cleaning tank body 1 by a fixed bracket, and its two ends are respectively connected to the inner wall of the cleaning tank body 1. The spiral arrangement of the arc-shaped heating tubes 2 causes them to extend along the axial direction of the cleaning tank body 1 and cover most of the internal space of the cleaning tank body 1. The rotary drive mechanism 3 includes a motor 4, a drive gear 5, and a driven gear ring 6. The motor 4 is fixedly installed on the outside of the cleaning tank body 1, and its output shaft is fixedly connected to the drive gear 5. The drive gear 5 meshes with the driven gear ring 6 located on the outside of the arc-shaped heating tubes 2. When the motor 4 starts, the drive gear 5 drives the driven gear ring 6 to rotate, thereby causing the arc-shaped heating tubes 2 to rotate around the central axis of the cleaning tank body 1. The rotation of the arc-shaped heating tubes 2 can drive the cleaning liquid to form a vortex in the cleaning tank body 1. The cleaning liquid is uniformly heated and flows under the action of the arc-shaped heating tubes 2, thereby avoiding the problem of uneven temperature distribution in local areas.

[0027] The cleaning fluid circulation system includes a circulation pump 7, a baffle plate 8, and a spray head assembly 9, such as... Figure 3As shown. The inlet of the circulating pump 7 is connected to the outlet at the bottom of the cleaning tank body 1 via a pipe, and the outlet of the circulating pump 7 is connected to the spray head assembly 9 via a diversion pipe. The guide plate 8 is fixedly installed on the inner wall of the cleaning tank body 1, and its surface has multiple sets of inclined guide grooves. The opening direction of the guide grooves forms a certain angle with the central axis of the cleaning tank body 1. The design of the guide grooves can guide the cleaning liquid to flow along a predetermined path, so that the cleaning liquid forms a stable circulation within the cleaning tank body 1. The spray head assembly 9 includes multiple nozzles, each nozzle is connected to the diversion pipe via a ball joint connector, and the spray direction of the nozzle can be adjusted by the ball joint connector. In actual operation, the spray angle of the nozzle is adjusted according to the size and shape of the multilayer circuit board to ensure that the cleaning liquid can cover every corner of the circuit board.

[0028] The circuit board support assembly includes a support frame 10 and elastic clips 11, such as Figure 4 As shown, the support frame 10 is composed of multiple horizontal and vertical bars connected in an interlaced manner to form a grid structure. The bottom of the support frame 10 is slidably connected to the inner wall of the cleaning tank body 1 via a slide rail 15. Limiting blocks 16 are respectively provided at both ends of the slide rail 15 to limit the movement range of the support frame 10. The elastic clamping piece 11 is connected to the horizontal bar of the support frame 10 via a spring, and an anti-slip pad is provided on the inner side of the elastic clamping piece 11. During use, the multilayer circuit board is placed on the support frame 10 and clamped and fixed by the elastic clamping piece 11 to prevent the circuit board from shaking or tipping over during cleaning. The anti-slip pad of the elastic clamping piece 11 can reduce frictional damage to the surface of the circuit board and protect the integrity of the circuit board.

[0029] The vibration auxiliary module includes a vibrator 12 and a vibration transmission plate 13, such as Figure 5 As shown. The vibrator 12 is fixedly installed on the outer wall of the cleaning tank body 1, and the vibration transmission plate 13 is fixedly connected to the inner wall of the cleaning tank body 1 by bolts. The surface of the vibration transmission plate 13 is provided with multiple sets of protruding structures 14, each protruding structure 14 being hemispherical in shape. When the vibrator 12 is started, the vibration transmission plate 13 generates high-frequency vibration, and the protruding structures 14 enhance the turbulence effect of the cleaning fluid, allowing the cleaning fluid to penetrate deeper into the tiny gaps of the circuit board, further improving cleaning efficiency. The operating frequency of the vibrator 12 can be adjusted by the frequency adjustment module of the control system to adapt to different cleaning needs.

[0030] In actual operation, such as Figure 6As shown, the multilayer circuit board is placed on the support frame 10 and fixed by the elastic clips 11. The support frame 10 then moves to the center of the cleaning tank body 1 via the slide rail 15. After starting the motor 4, the arc-shaped heating tube 2 begins to rotate. Simultaneously, the circulation pump 7 extracts the cleaning fluid from the bottom of the cleaning tank body 1 and delivers it to the spray head assembly 9 through a diversion pipe. The nozzles in the spray head assembly 9 spray the cleaning fluid onto the circuit board at a preset angle. Under the action of the guide channel of the guide plate 8, the cleaning fluid flows along a predetermined path, forming a stable circulation. At the same time, the vibrator 12 drives the vibration transmission plate 13 to generate high-frequency vibration, and the raised structure 14 enhances the turbulence effect of the cleaning fluid, enabling the cleaning fluid to more effectively clean the surface and gaps of the circuit board. Throughout the cleaning process, the synergistic effect of the rotational motion of the arc-shaped heating tube 2 and the cleaning fluid circulation system ensures uniform heating and fluidity of the cleaning fluid, thereby significantly improving cleaning quality and efficiency.

[0031] The above describes the specific implementation of this utility model. Through the coordinated operation of the dynamic heating component, the cleaning fluid circulation system, the circuit board support component, and the vibration auxiliary module, efficient cleaning of multi-layer circuit boards is achieved.

[0032] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0033] First, the operator places the multilayer circuit board to be cleaned on the support frame 10 and secures it with elastic clips 11. The anti-slip pads on the inner side of the elastic clips 11 contact the surface of the circuit board, ensuring that the circuit board is not damaged during clamping. Then, the support frame 10 moves to the center of the cleaning tank body 1 via the slide rail 15. The limiting block 16 restricts the movement range of the support frame 10, ensuring that the circuit board is accurately positioned in the center of the cleaning tank body 1, thus providing a stable positioning basis for subsequent cleaning steps.

[0034] Next, motor 4 is started, and the rotary drive mechanism 3 begins to operate. Driven by motor 4, the driving gear 5 rotates, and through meshing with the driven gear ring 6, it drives the arc-shaped heating tube 2 to rotate around the central axis of the cleaning tank body 1. The spiral arrangement of the arc-shaped heating tube 2 extends axially along the cleaning tank body 1, covering most of the internal space. The rotation of the arc-shaped heating tube 2 not only heats the cleaning fluid evenly but also creates vortices in the fluid through its movement. This vortex effect makes the cleaning fluid flow more evenly within the cleaning tank body 1, avoiding uneven temperature distribution in localized areas, and enhancing the fluidity of the cleaning fluid, thus helping to remove impurities and residues adhering to the circuit board surface.

[0035] Simultaneously, the circulation pump 7 starts, drawing the cleaning fluid from the bottom of the cleaning tank body 1 and delivering it to the spray head assembly 9 through a diversion pipe. Multiple nozzles in the spray head assembly 9 spray the cleaning fluid onto the circuit board at preset angles. The spray direction of the nozzles can be adjusted via ball joint connectors to accommodate circuit boards of different sizes and shapes. Inclined guide channels on the guide plate 8 further guide the cleaning fluid along a predetermined path, creating a stable circulation of the cleaning fluid within the cleaning tank body 1. This design ensures that the cleaning fluid covers every corner of the circuit board, effectively eliminating cleaning blind spots.

[0036] While the cleaning fluid circulation system is running, the vibrator 12 is activated, driving the vibration transmission plate 13 to generate high-frequency vibration. The hemispherical protrusions 14 on the surface of the vibration transmission plate 13 enhance the turbulence effect of the cleaning fluid, allowing it to penetrate deeper into the tiny gaps in the circuit board. The operating frequency of the vibrator 12 can be adjusted via the frequency regulation module of the control system to adapt to different cleaning needs. This vibration-assisted mechanism further improves cleaning efficiency, especially when dealing with complex shapes or multi-layered circuit boards, significantly improving the cleaning effect.

[0037] Throughout the cleaning process, the dynamic heating components, cleaning fluid circulation system, circuit board support components, and vibration auxiliary module work together to ensure uniform heating and fluidity of the cleaning fluid. The rotational motion of the arc-shaped heating tube 2, combined with the circulation design of the cleaning fluid circulation system, avoids uneven temperature distribution in local areas; the angle adjustment function of the spray head assembly 9 and the guide groove design of the guide plate 8 ensure that the cleaning fluid can fully cover the surface of the circuit board; the high-frequency vibration of the vibration transmission plate 13 further enhances the penetration ability of the cleaning fluid.

[0038] Through the above steps, this invention achieves efficient cleaning of multilayer circuit boards. The uniform heating and flow properties of the cleaning fluid significantly improve the cleaning quality, while the introduction of the vibration-assisted module further enhances cleaning efficiency, especially for complex-shaped or multilayer circuit boards. The entire device is compact and reasonable in design, easy to operate, and has high practicality and promotional value.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic hot cleaning device for multilayer circuit boards before zinc spraying, comprising a cleaning tank body (1) and a control system, characterized in that, Also includes: The dynamic heating assembly includes a heating tube group and a rotary drive mechanism (3). The heating tube group consists of several arc-shaped heating tubes (2). The two ends of each arc-shaped heating tube (2) are mounted on the inner wall of the cleaning tank body (1) by a fixed bracket. The arc-shaped heating tubes (2) are arranged in a spiral shape along the axial direction of the cleaning tank body (1). The rotary drive mechanism (3) includes a motor (4) and a transmission gear. The output shaft end of the motor (4) is fixedly connected to a drive gear (5). The drive gear (5) meshes with a driven gear ring (6) provided on the outside of the arc-shaped heating tubes (2). The cleaning fluid circulation system includes a circulation pump (7), a guide plate (8), and a spray head assembly (9). The inlet of the circulation pump (7) is connected to the outlet at the bottom of the cleaning tank body (1) through a pipe. The outlet of the circulation pump (7) is connected to the spray head assembly (9) through a diversion pipe. The guide plate (8) is fixedly installed on the inner wall of the cleaning tank body (1), and multiple sets of inclined guide grooves are opened on the surface of the guide plate (8). The spray head assembly (9) includes multiple nozzles, and each nozzle is connected to the diversion pipe through a ball joint connector. The circuit board support assembly includes a support frame (10) and a clamping mechanism. The support frame (10) is formed by multiple horizontal and vertical bars connected in an interlaced manner to form a grid structure. The bottom of the support frame (10) is slidably connected to the inner wall of the cleaning tank body (1) through a slide rail (15). Limiting blocks (16) are respectively provided at both ends of the slide rail (15). The clamping mechanism includes multiple elastic clamps (11). Each elastic clamp (11) is connected to the horizontal bar of the support frame (10) through a spring. The vibration auxiliary module includes a vibrator (12) and a vibration transmission plate (13). The vibrator (12) is fixedly installed on the outer wall of the cleaning tank body (1). The vibration transmission plate (13) is fixedly connected to the inner wall of the cleaning tank body (1) by bolts. The surface of the vibration transmission plate (13) is provided with multiple sets of protruding structures (14).

2. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The spiral arrangement of the arc-shaped heating tube (2) extends along the axial direction of the cleaning tank body (1) and covers the internal space of the cleaning tank body (1).

3. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The opening direction of the guide channel is at a certain angle to the central axis of the main body of the cleaning tank (1), which is used to guide the cleaning liquid to flow along a predetermined path.

4. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The inner side of the elastic clip (11) is provided with an anti-slip pad to fix the circuit board and reduce friction damage.

5. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The protruding structure (14) is hemispherical in shape, which is used to enhance the turbulence effect of the cleaning fluid.

6. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The spray direction of the nozzle can be adjusted by a ball joint connector to accommodate circuit boards of different sizes and shapes.

7. The automatic hot washing device for multilayer circuit boards before zinc spraying according to claim 1, characterized in that, The vibrator (12) is connected to the power supply through the frequency adjustment module of the control system, which is used to adjust the working frequency of the vibrator (12).

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