Slow flow defoaming structure and PCB cleaning device
By designing a slow-flow defoaming structure in the PCB board cleaning device, the three-time buffering of the inclined deflector and the current collector reduces foam, the problem of foam affecting cleaning is solved, and the cleaning effect and production efficiency are improved.
Patent Information
- Application Number
- CN202422115411.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The PCB board cleaning tank lacks a slow flow structure, resulting in more foam generated in the rinsing liquid, affecting the cleaning effect and production efficiency.
A slow-flow defoaming structure is designed, including an inclined defoamer, current collector and flow tube, to reduce foam generation through three buffering, and to assist defoaming with chemical agents.
Effectively reduce foam generation, improve cleaning effect, ensure the surface quality of PCB boards, and improve production efficiency.
Smart Images
Figure CN223047299U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PCB board cleaning, in particular to a slow-flow defoaming structure and a PCB board cleaning device. Background Art
[0002] PCB board etching is an important process in the PCB manufacturing process, which involves removing the unnecessary copper layer from the circuit board to form the required circuit pattern. The PCB board needs to be cleaned before etching to remove possible impurities such as oil stains, oxides, dust, etc., to ensure the clarity of the etched pattern.
[0003] When flushing the PCB board, a certain amount of foam will be generated. If the foam cannot be eliminated and broken in time, there may be fine foam on the surface of the PCB board. When the foam breaks, there will be tiny holes or defects on the surface of the PCB board, which may cause circuit open circuit or breakage. In addition, when there is more foam in the cleaning tank, it will affect the staff's observation of the cleaning situation of the PCB board, affecting the production efficiency and quality of the PCB board; the traditional defoaming method is to add chemical agents to the cleaning liquid. However, when the flushing liquid flows in the cleaning tank, if the flow of the flowing liquid cannot be restricted, there will still be more foam in the liquid, affecting the cleaning of the PCB board. Summary of the Utility Model
[0004] The utility model aims to solve the above technical problems, that is, the lack of a slow-flow structure in the PCB board cleaning tank will still cause more foam to be generated in the flushing liquid, affecting the cleaning of the PCB board.
[0005] In a first aspect, the utility model provides a slow-flow defoaming structure, including:
[0006] An outer housing, which forms a drainage part and a water storage part inside, and an inclined guide plate is arranged in the drainage part;
[0007] A defoaming component, which is arranged on the bottom surface of the guide plate. The defoaming component can collect the liquid flowing obliquely along the upper surface of the guide plate and buffer the collected liquid for conveying towards the water storage part.
[0008] In a preferred technical solution of the above slow-flow defoaming structure, the defoaming component at least includes a flow collecting member in an arc structure and at least one guide pipe arranged at the bottom of the flow collecting member and communicated with the flow collecting member. Among them, the opening at the top of the flow collecting member is communicated with the upper surface of the guide plate.
[0009] In a preferred technical solution of the above slow-flow defoaming structure, the guide pipe is one of a straight pipe or a bent pipe.
[0010] In the preferred technical solution of the above slow-flow defoaming structure, a rubber hose is arranged at one end of the diversion pipe away from the current collector.
[0011] In the preferred technical solution of the above slow-flow defoaming structure, an inclined slow-flow plate is arranged in the water storage part, and the relatively high position of the inclined slow-flow plate is directly below the diversion pipe.
[0012] In the preferred technical solution of the above slow-flow defoaming structure, a polytetrafluoroethylene coating is sprayed inside the current collector and the diversion pipe.
[0013] In a second aspect, the present utility model further provides a PCB board cleaning device, which includes the above slow-flow defoaming structure, and further includes a flushing component and a conveying component arranged in the drainage part. The conveying component is located between the flushing components, and the conveying component is used to convey the PCB board between the flushing components, so that: the flushing component pumps the liquid stored in the water storage part to the drainage part to form flushing of the PCB board conveyed by the conveying component.
[0014] In the preferred technical solution of the above PCB board cleaning device, the flushing component at least includes a first nozzle component and a second nozzle component symmetrically distributed in the height direction and arranged in the drainage part, and a circulation pump for pumping the liquid in the water storage part to the first nozzle component and the second nozzle component.
[0015] In the preferred technical solution of the above PCB board cleaning device, the conveying component at least includes a first conveying roller and a second conveying roller symmetrically arranged in the height direction, and a driving device for driving the first conveying roller and / or the second conveying roller to rotate.
[0016] In the preferred technical solution of the above PCB board cleaning device, a heating device for heating the liquid is arranged in the water storage part.
[0017] The beneficial effect of the present utility model is that the liquid in the drainage part of the outer shell is collected by the inclined diversion plate to complete the first buffering of the liquid. The liquid on the diversion plate is collected into the current collector, and the current collector forms the second buffering of the liquid. The liquid in the current collector is discharged to the water storage part through the diversion pipe to form the third buffering of the liquid. Under the action of three times of buffering of the fluid, the phenomenon that more foam is generated during the flow of the liquid can be effectively reduced, and the slow-flow defoaming effect is achieved. Description of the Drawings
[0018] Figure 1 It is a schematic diagram of the slow-flow defoaming structure;
[0019] Figure 2 It is a schematic diagram of the PCB board cleaning deviceFigure 1 ;
[0020] Figure 3 Schematic of the PCB board cleaning device Figure 2 ;
[0021] In the figure: outer housing 1, drainage part 11, water storage part 12, diversion plate 2, current collector 31, diversion pipe 32, flow retarder plate 4, first spray head assembly 51, second spray head assembly 52, circulation pump 53, first conveying roller 61, second conveying roller 62, heating device 7. Detailed implementation manners
[0022] The following describes the preferred implementation manners of the present utility model with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.
[0023] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0024] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0025] See Figure 1 , the flow retarder and defoaming structure of the present utility model includes: an outer housing 1, in which a drainage part 11 and a water storage part 12 are formed, and an inclined diversion plate 2 is arranged in the drainage part 11; a defoaming assembly, the defoaming assembly is arranged on the bottom surface of the diversion plate 2, and the defoaming assembly can collect the liquid flowing obliquely along the upper surface of the diversion plate 2 and buffer the collected liquid for conveying towards the water storage part 12.
[0026] See Figure 1 , a drainage part 11 and a water storage part 12 are formed in the outer housing 1. Among them, the water storage part 12 is relatively located on the side of the drainage part 11, and in the height direction, the drainage part 11 is relatively higher than the water storage part 12, so that the liquid in the drainage part 11 can flow smoothly to the water storage part 12.
[0027] Refer to Figure 1 and Figure 2 . The deflector 2 is arranged obliquely so that the liquid dripping in the drainage part 11 can be guided and conveyed towards the water storage part 12 through the deflector 2. The defoaming component is relatively located at the lower position of the deflector 2, so that the liquid dripping onto the deflector 2 becomes gentle and then is collected by the defoaming component. When the liquid flows to the defoaming component, the defoaming component can deflect and buffer the liquid to reduce the problem of generating a large number of bubbles by colliding with other components in the outer housing 1, and has the characteristics of good defoaming effect. In addition, other chemical agents can be added to the liquid as an aid to further reduce the generation of bubbles in the liquid.
[0028] In one or more embodiments, the defoaming component at least includes a flow collecting member 31 having an arc-shaped structure and at least one diversion pipe 32 disposed at the bottom of the flow collecting member 31 and communicating with the flow collecting member 31. Among them, the opening at the top of the flow collecting member 31 is in communication with the upper surface of the deflector 2; the diversion pipe 32 is one of a straight pipe or a bent pipe.
[0029] Refer to Figure 1 and Figure 2 and Figure 3 . The cross-section of the flow collecting member 31 has an arc-shaped structure. A plurality of through holes are formed at the bottom of the flow collecting member 31. One end of the diversion pipe 32 is installed in the through hole of the flow collecting member 31. The diversion pipe 32 can be a straight pipe or a bent pipe. The flow collecting member 31 is relatively located at the lower position of the deflector 2, and a plurality of flow collecting members 31 can be arranged on the deflector 2.
[0030] When the liquid drips from the drainage part 11 onto the deflector 2, the obliquely arranged deflector 2 collects the liquid to complete the first buffering of the liquid. Then, the liquid on the deflector 2 converges into the flow collecting member 31 under the action of gravity. The arc-shaped flow collecting member 31 can form the second buffering of the liquid. The liquid in the flow collecting member 31 is then discharged to the water storage part 12 through the diversion pipe 32 to form the third buffering of the liquid. Through this setting, it can effectively reduce the phenomenon that more foam is generated when the liquid impacts foreign objects during the flowing process, achieve the effect of slow flow and defoaming, and has a simple structure and practicality.
[0031] In other possible implementation manners, the diversion pipe 32 is obliquely arranged to increase the slope of the diversion pipe 32 and reduce the liquid flow rate in the diversion pipe 32, further improving the buffering and defoaming effect on the liquid.
[0032] In one or more embodiments, a rubber hose is arranged at one end of the diversion pipe 32 away from the flow collecting member 31.
[0033] The rubber hose is not shown in the drawings. When no liquid flows through the rubber hose, at least part of the end of the rubber hose is in a closed state. When the liquid in the diversion pipe 32 flows out through the rubber hose, under the action of the rubber hose, a buffer for the liquid can be further formed; the size of the opening at the end of the rubber hose can adaptively increase with the increase of the liquid flow rate, and there will be no problem of hindering the flow of the liquid in the diversion pipe 32.
[0034] In one or more embodiments, the water storage part 12 is configured with an inclined flow retarder plate 4, and the relatively high position of the inclined flow retarder plate 4 is located directly below the diversion pipe 32. Refer to Figure 2 , by configuring the flow retarder plate 4 in the water storage part 12 of the outer housing 1 to receive the liquid flowing out of the diversion pipe 32, the function of slowing down the flow and defoaming the liquid can be further realized.
[0035] In one or more embodiments, a polytetrafluoroethylene coating is sprayed inside the flow collector 31 and the diversion pipe 32. Polytetrafluoroethylene has a certain lubricating effect, which can accelerate the flow rate of the liquid in the flow collector 31 and the diversion pipe 32 and further reduce the generation of foam.
[0036] In addition, refer to Figure 2 、 Figure 3 , the present utility model further provides a PCB board cleaning device, which has the flow retardation and defoaming structure in any of the above embodiments, and further includes a flushing component and a conveying component arranged in the drainage part 11. The conveying component is located between the flushing components. The conveying component is used to convey the PCB board between the flushing components, so that: the flushing component pumps the liquid stored in the water storage part 12 to the drainage part 11 to form flushing of the PCB board conveyed by the conveying component; the flushing component at least includes a first nozzle component 51 and a second nozzle component 52 that are symmetrically distributed in the height direction and arranged in the drainage part 11, and a circulating pump 53 for pumping the liquid in the water storage part 12 to the first nozzle component 51 and the second nozzle component 52; the conveying component at least includes a first conveying roller 61 and a second conveying roller 62 that are symmetrically arranged in the height direction, and a driving device for driving the first conveying roller 61 and / or the second conveying roller 62 to rotate.
[0037] Refer to Figure 2 、 Figure 3 , both the first nozzle component 51 and the second nozzle component 52 are composed of a plurality of nozzles. The outlet of the circulating pump 53 is connected to the first nozzle component 51 and the second nozzle component 52 through pipelines. The inlet of the circulating pump 53 is connected to the water storage part 12 of the outer housing 1 through a pipeline. When the circulating pump 53 works, it can pump the liquid in the water storage part 12 of the outer housing 1 into the first nozzle component 51 and the second nozzle component 52. The liquid in the first nozzle component 51 and the second nozzle component 52 is sprayed towards the PCB board conveyed by the conveying component in opposite directions to realize simultaneous cleaning of both sides of the PCB board.
[0038] See Figure 2 and Figure 3 Figure 3 , the conveying assembly includes a plurality of first conveying rollers 61 and second conveying rollers 62. The plurality of first conveying rollers 61 and second conveying rollers 62 are arranged along the PCB board conveying direction. The first conveying rollers 61 and second conveying rollers 62 pass between the first spray head assembly 51 and the second spray head assembly 52. The driving device can drive the first conveying rollers 61 or the second conveying rollers 62 to rotate. The driving device can be a servo motor or other possible driving sources.
[0039] In one or more embodiments, a heating device 7 for heating the liquid is arranged in the water storage part 12. See Figure 2 Figure 2 , the heating device 7 can be a heating coil. By heating the water storage part 12 of the outer shell 1 through the heating device 7, the temperature requirement for flushing the PCB board in different environments can be met, and the application range of the PCB board cleaning device of the present application can be improved.
[0040] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims
1. A slow-flow defoaming structure, characterized in that: include: An outer shell, in which a drainage part and a water storage part are formed, and an inclined guide plate is arranged in the drainage part; A defoaming component is arranged on the bottom surface of the guide plate, and the defoaming component can collect the liquid flowing obliquely along the upper surface of the guide plate, and buffer the collected liquid to transport it toward the water storage part.
2. The slow-flow defoaming structure according to claim 1, characterized in that: The defoaming assembly at least includes a current collecting member with an arc-shaped structure, and at least one guide tube arranged at the bottom of the current collecting member and connected to the current collecting member, wherein the opening at the top of the current collecting member is connected to the upper surface of the guide plate.
3. The slow-flow defoaming structure according to claim 2, characterized in that: The flow guide pipe is a straight pipe or a curved pipe.
4. The slow-flow defoaming structure according to claim 2 or 3, characterized in that: The flow guide pipe is provided with a rubber hose at one end away from the flow collecting member.
5. The slow-flow defoaming structure according to claim 2, characterized in that: The water storage part is provided with an inclined slow flow plate, and the relatively high position of the inclined slow flow plate is located directly below the guide pipe.
6. The slow-flow defoaming structure according to claim 2, characterized in that: The current collecting member and the flow guide pipe are sprayed with polytetrafluoroethylene coating.
7. A PCB cleaning device, characterized in that: It comprises the slow-flow defoaming structure as described in any one of claims 1 to 6, and also comprises a flushing component and a conveying component arranged in the drainage part, wherein the conveying component is located between the flushing components, and the conveying component is used to convey the PCB board to between the flushing components, so that: the flushing component draws the liquid stored in the water storage part to the drainage part to flush the PCB board conveyed by the conveying component.
8. The PCB cleaning device according to claim 7, characterized in that: The flushing assembly at least includes a first nozzle assembly and a second nozzle assembly which are symmetrically distributed in the height direction and arranged in the drainage part, and a circulation pump for pumping liquid in the water storage part to the first nozzle assembly and the second nozzle assembly.
9. The PCB cleaning device according to claim 7, characterized in that: The conveying assembly at least includes a first conveying roller and a second conveying roller which are symmetrically arranged in the height direction, and a driving device for driving the first conveying roller and / or the second conveying roller to rotate.
10. The PCB cleaning device according to claim 7, characterized in that: The water storage part is provided with a heating device for heating the liquid.