Filtering device for preparing tin-silver alloy plating solution

Abstract

The utility model discloses a filtering device for tin-silver alloy plating solution preparation, which belongs to the technical field of tin-silver alloy plating solution preparation and comprises a filtering tank, a first connecting shell and a second connecting shell are arranged in the filtering tank, and the bottom of the first connecting shell is fixedly connected with the top of the second connecting shell. A plurality of filtering holes which are annularly distributed at equal intervals are formed in the outer surface of the first connecting shell, impurities in the plating solution can be efficiently removed through the multiple filtering holes which are annularly distributed at equal intervals in the outer surface of the first connecting shell, and the rotating assembly drives the first connecting shell to rotate through the driving motor; the plating solution is more uniformly distributed around the filtering holes by utilizing centrifugal force, the concentration gradient in the plating solution is effectively reduced, the uniformity of the plating solution is improved, the deposition and agglomeration of impurities in the plating solution are favorably prevented by the rotary motion, the stability of the plating solution is enhanced, and the plating solution is more stable due to the removal of most impurities. And the plating layer can be more uniform and compact in the deposition process, so that the performance of the plating layer is improved.

Description

Technical Field

[0001] This utility model relates to the field of tin-silver alloy plating solution preparation technology, and more specifically, to a filtration device for preparing tin-silver alloy plating solution. Background Technology

[0002] In the fields of electronics manufacturing and semiconductor packaging, tin-silver alloy plating solutions are widely used due to their excellent conductivity, solderability, corrosion resistance, and mechanical strength. Especially in wafer-level packaging and printed circuit board manufacturing processes, tin-silver alloy plating can effectively improve product reliability and lifespan.

[0003] In the preparation of tin-silver alloy plating solutions, various raw materials such as tin salts, silver salts, and other additives need to be precisely proportioned and mixed and dissolved through specific process steps. However, due to impurities in the raw materials, chemical reactions during the dissolution process, and factors such as oxygen and carbon dioxide in the air, insoluble precipitates, oxides, and other impurities may be generated in the plating solution. These impurities not only affect the uniformity and stability of the plating solution but also reduce the quality and performance of the coating. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a filtration device for preparing tin-silver alloy plating solutions, thus solving the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a filtration device for preparing a tin-silver alloy plating solution, comprising a filter tank, an inlet fixedly installed on the outer surface of the filter tank, an outlet fixedly installed at the bottom of the filter tank, the inlet being located above the outlet, a first connecting shell and a second connecting shell being provided inside the filter tank, the bottom of the first connecting shell being fixedly connected to the top of the second connecting shell, the inlet being fixedly connected to the first connecting shell, a plurality of annularly equidistantly distributed filter holes being opened on the outer surface of the first connecting shell, the lower part of the second connecting shell being conical and located inside the outlet, and further comprising:

[0006] A cleaning component, located inside the first connecting housing, is used to clean multiple filter holes;

[0007] A rotating assembly, located inside the first connecting shell, is used to drive the first connecting shell to rotate.

[0008] Preferably, the cleaning assembly includes a connecting plate, a fixing seat, a cleaning plate, cleaning columns, and connecting rods. The connecting plate is fixedly connected to the bottom of the first connecting shell, and the fixing seat is fixedly connected to the top of the connecting plate. Multiple annularly distributed connecting rods are rotatably connected to the outer surface of the fixing seat. The ends of the multiple connecting rods located in the same vertical and horizontal direction are rotatably connected to the cleaning plates. The multiple cleaning plates are all arranged in an arc shape. Multiple equidistantly distributed cleaning columns are fixedly connected to the outer surfaces of the multiple cleaning plates that are close to the filter tank. The multiple cleaning columns are movably inserted into the multiple filter holes.

[0009] Preferably, a push cylinder is fixedly installed on the top of the connecting plate. The push cylinder is located inside the fixed base and its output end is movably connected to the fixed base. A connecting block is fixedly connected to the output end of the push cylinder. The connecting block is located above the fixed base, and multiple connecting rods on the upper side are rotatably connected to the outer surface of the connecting block.

[0010] Preferably, the top of the connecting plate has a plurality of annularly spaced through holes.

[0011] Preferably, the rotating assembly includes a drive motor and a connecting column. The connecting column is fixedly connected inside the first connecting shell, the drive motor is fixedly installed on the top of the filter tank, the output end of the drive motor is fixedly connected to the connecting column, and the first connecting shell is rotatably connected to the inner wall of the top of the filter tank.

[0012] Preferably, a PLC controller is fixedly installed on the outer surface of the filter tank, and the drive motor and the push cylinder are both controlled by the PLC controller.

[0013] Compared with the prior art, the present invention provides a filtration device for preparing tin-silver alloy plating solution, which has the following advantages:

[0014] This filtration device for preparing tin-silver alloy plating solution can efficiently remove impurities from the plating solution through multiple annularly spaced filter holes on the outer surface of the first connecting shell. The rotating component drives the first connecting shell to rotate through a drive motor, and the centrifugal force makes the plating solution more evenly distributed around the filter holes, effectively reducing the concentration gradient in the plating solution and improving the uniformity of the plating solution. The rotational motion also helps to prevent the deposition and agglomeration of impurities in the plating solution, further enhancing the stability of the plating solution. The plating solution filtered by this device has removed most of the impurities, making the coating more uniform and dense during the deposition process, thereby improving the hardness, corrosion resistance and solderability of the coating.

[0015] This filtration device for preparing tin-silver alloy plating solution makes cleaning the filter holes simple and efficient through the design of the cleaning components. When the filter holes need to be cleaned, the PLC controller starts to push the cylinder. Through the unfolding of the connecting rod and the cleaning plate, the cleaning column can be inserted and passed through the filter holes, effectively removing impurities attached to the filter holes, thereby keeping the filter holes unobstructed, extending the service life of the filtration device, and further improving the filtration efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the filter tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting column structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting plate assembly structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the cleaning component structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the cylinder that drives this utility model;

[0022] Figure 7 This is a schematic diagram of the PLC controller structure of this utility model.

[0023] In the diagram: 1. Filter tank; 2. Inlet; 3. Outlet; 4. Drive motor; 5. First connecting shell; 6. Second connecting shell; 7. Filter hole; 8. Connecting column; 9. Connecting plate; 10. Through hole; 11. Fixing base; 12. Cleaning plate; 13. Cleaning column; 14. Connecting rod; 15. Connecting block; 16. Push cylinder; 17. PLC controller. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-7 This utility model provides a technical solution:

[0026] A filtration device for preparing a tin-silver alloy plating solution includes a filter tank 1. An inlet 2 is fixedly installed on the outer surface of the filter tank 1, and an outlet 3 is fixedly installed on the bottom of the filter tank 1. The inlet 2 is located above the outlet 3. The filter tank 1 has a first connecting shell 5 and a second connecting shell 6 inside. The bottom of the first connecting shell 5 is fixedly connected to the top of the second connecting shell 6. The inlet 2 is fixedly connected to the first connecting shell 5. The outer surface of the first connecting shell 5 has a plurality of annularly spaced filter holes 7. The lower part of the second connecting shell 6 is conical and located inside the outlet 3. The device also includes:

[0027] A cleaning component, located inside the first connecting housing 5, is used to clean the multiple filter holes 7;

[0028] The rotating component, located inside the first connecting shell 5, is used to drive the first connecting shell 5 to rotate. First, the plating solution enters the first connecting shell 5 inside the filter tank 1 through the feed port 2. The filtered tin-silver alloy plating solution located in the filter tank 1 or the second connecting shell 6 flows out from the discharge port 3.

[0029] Furthermore, the cleaning assembly includes a connecting plate 9, a fixing seat 11, a cleaning plate 12, a cleaning column 13, and connecting rods 14. The connecting plate 9 is fixedly connected to the bottom of the first connecting shell 5, and the fixing seat 11 is fixedly connected to the top of the connecting plate 9. Multiple annularly distributed connecting rods 14 are rotatably connected to the outer surface of the fixing seat 11. The ends of the multiple connecting rods 14 located in the same vertical and horizontal direction are rotatably connected to cleaning plates 12. The multiple cleaning plates 12 are all arranged in an arc shape and are close to the filter tank 1. Multiple cleaning columns 13 are fixedly connected to the outer surface at equal intervals. The multiple cleaning columns 13 are movably inserted into the multiple filter holes 7, thereby driving the remaining connecting rods 14 to move down and thus opening up the multiple cleaning plates 12. The cleaning plates 12 are arranged in an arc shape. When the cleaning plates 12 are tightly attached to the inner wall of the filter tank 1, the cleaning columns 13 are movably inserted into the filter holes 7. As the cleaning plates 12 come into contact with the inner wall of the first connecting shell 5, the cleaning columns 13 will insert into and pass through the filter holes 7, thereby effectively removing impurities attached to the area around the filter holes 7.

[0030] Furthermore, a push cylinder 16 is fixedly installed on the top of the connecting plate 9. The push cylinder 16 is located inside the fixed base 11 and its output end is movably connected to the fixed base 11. A connecting block 15 is fixedly connected to the output end of the push cylinder 16. The connecting block 15 is located above the fixed base 11. Multiple connecting rods 14 on the upper side are rotatably connected to the outer surface of the connecting block 15. The PLC controller 17 can start and control the push cylinder 16 according to the preset program and parameters. During the downward movement of the output end of the push cylinder 16, the connecting block 15 is driven to move downward. During the downward movement of the connecting block 15, the multiple connecting rods 14 on the upper side are unfolded.

[0031] Furthermore, the top of the connecting plate 9 is provided with multiple annularly distributed through holes 10, through which the remaining tin-silver alloy plating solution is filtered.

[0032] Furthermore, the rotating assembly includes a drive motor 4 and a connecting column 8. The connecting column 8 is fixedly connected inside the first connecting shell 5. The drive motor 4 is fixedly installed on the top of the filter tank 1. The output end of the drive motor 4 is fixedly connected to the connecting column 8. The first connecting shell 5 is rotatably connected to the inner wall of the top of the filter tank 1.

[0033] Furthermore, a PLC controller 17 is fixedly installed on the outer surface of the filter tank 1. The drive motor 4 and the push cylinder 16 are all controlled by the PLC controller 17. The entire filtration and cleaning process is intelligently controlled by the PLC controller 17.

[0034] Working Principle: When the operator needs to use the filtration device for preparing tin-silver alloy plating solution, the plating solution first enters the first connecting shell 5 inside the filter tank 1 through the inlet 2. Then, the PLC controller 17 can start and control the drive motor 4 according to the preset program and parameters. The output end of the drive motor 4 is fixedly connected to the connecting column 8, which is in turn fixedly connected inside the first connecting shell 5. When the drive motor 4 starts, it drives the first connecting shell 5 to rotate on the top inner wall of the filter tank 1 through the connecting column 8. This rotation helps the tin-silver alloy plating solution to be thrown out through the filter holes 7 under the action of centrifugal force. Large impurities remain in the first connecting shell 5, thereby improving the filtration efficiency. The remaining tin-silver alloy plating solution is filtered through the through holes 10 on the connecting plate 9. Finally, the filtered tin-silver alloy plating solution is located in the filter tank 1 or the second connecting shell 6. The liquid flows out from the outlet 3. To keep the filter holes 7 unobstructed, the device is equipped with a cleaning component. When the filter holes 7 need to be cleaned, the PLC controller 17 can start the control of the push cylinder 16 according to the preset program and parameters. During the downward movement of the output end of the push cylinder 16, the connecting block 15 is driven to move downward. During the downward movement of the connecting block 15, the multiple connecting rods 14 on the upper side are unfolded, thereby driving the remaining connecting rods 14 to move downward and thus opening up the multiple cleaning plates 12. The cleaning plates 12 are set in an arc-shaped structure. When the cleaning plates 12 are tightly attached to the inner wall of the filter tank 1, the cleaning column 13 is movably inserted into the filter hole 7. As the cleaning plates 12 come into contact with the inner wall of the first connecting shell 5, the cleaning column 13 will insert and pass through the filter hole 7, thereby effectively removing the impurities attached to the area around the filter hole 7. The entire filtration and cleaning process is intelligently controlled by the PLC controller 17.

[0035] 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 preferred examples and are not intended to limit the 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filtration device for preparing a tin-silver alloy plating solution, comprising a filter tank (1), wherein an inlet (2) is fixedly installed on the outer surface of the filter tank (1), and an outlet (3) is fixedly installed at the bottom of the filter tank (1), wherein the inlet (2) is located above the outlet (3), characterized in that: The filter tank (1) is provided with a first connecting shell (5) and a second connecting shell (6) inside. The bottom of the first connecting shell (5) is fixedly connected to the top of the second connecting shell (6). The feed inlet (2) is fixedly connected to the first connecting shell (5). The outer surface of the first connecting shell (5) is provided with a plurality of annularly distributed filter holes (7). The bottom of the second connecting shell (6) is conical and located inside the discharge port (3). The filter tank also includes: A cleaning component, located inside the first connecting housing (5), is used to clean the multiple filter holes (7); A rotating assembly, located inside the first connecting shell (5), is used to drive the first connecting shell (5) to rotate.

2. The filtration device for preparing tin-silver alloy plating solution according to claim 1, characterized in that: The cleaning assembly includes a connecting plate (9), a fixing seat (11), a cleaning plate (12), a cleaning column (13), and a connecting rod (14). The bottom of the first connecting shell (5) is fixedly connected to the connecting plate (9), and the top of the connecting plate (9) is fixedly connected to the fixing seat (11). The outer surface of the fixing seat (11) is rotatably connected to a plurality of annularly distributed connecting rods (14). The ends of the plurality of connecting rods (14) located in the same vertical and horizontal direction are rotatably connected to the cleaning plate (12). The plurality of cleaning plates (12) are all arranged in an arc shape. The outer surfaces of the plurality of cleaning plates (12) that are close to the filter tank (1) are fixedly connected to a plurality of equidistantly distributed cleaning columns (13). The plurality of cleaning columns (13) are movably inserted into a plurality of filter holes (7).

3. The filtration device for preparing tin-silver alloy plating solution according to claim 2, characterized in that: A push cylinder (16) is fixedly installed on the top of the connecting plate (9). The push cylinder (16) is located inside the fixed seat (11) and the output end of the push cylinder (16) is movably connected to the fixed seat (11). A connecting block (15) is fixedly connected to the output end of the push cylinder (16). The connecting block (15) is located above the fixed seat (11), and multiple connecting rods (14) on the upper side are rotatably connected to the outer surface of the connecting block (15).

4. The filtration device for preparing tin-silver alloy plating solution according to claim 2, characterized in that: The top of the connecting plate (9) has multiple annularly distributed through holes (10).

5. The filtration device for preparing tin-silver alloy plating solution according to claim 1, characterized in that: The rotating assembly includes a drive motor (4) and a connecting column (8). The connecting column (8) is fixedly connected inside the first connecting shell (5). The drive motor (4) is fixedly installed on the top of the filter tank (1). The output end of the drive motor (4) is fixedly connected to the connecting column (8). The first connecting shell (5) is rotatably connected to the inner wall of the top of the filter tank (1).

6. The filtration device for preparing tin-silver alloy plating solution according to claim 5, characterized in that: A PLC controller (17) is fixedly installed on the outer surface of the filter tank (1), and the drive motor (4) and the push cylinder (16) are both controlled by the PLC controller (17).

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