Chemical silver plating auxiliary reaction device

Abstract

This utility model relates to the field of chemical silver deposition, and more particularly to an auxiliary reaction device for chemical silver deposition. This reaction device can clamp and fix corner-shaped PCB boards as described in the prior art at intervals, and can rotate to facilitate full contact with the liquid and uniform reaction, effectively solving the problems mentioned in the prior art. It includes a clamping mechanism comprising corner-shaped clamping plates spaced vertically. Both ends of the clamping plates are provided with vertical fixing plates. Fastening bolts are screwed through the middle positions of both ends of the clamping plates and the outer ends of the corners, respectively, from the outside in. Rotating shafts are coaxially fixed to the outer sides of the fixing plates. The outer ends of the rotating shafts are respectively sealed and rotatably connected to the silver deposition tank. One rotating shaft extends out of the silver deposition tank and is connected to a drive motor. It is simple to operate, convenient to use, and suitable for clamping and fixing corner-shaped PCB boards as described in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of chemical silver deposition, specifically to an auxiliary reaction device for chemical silver deposition. Background Technology

[0002] Chemical silver plating, a lead-free PCB surface treatment process, deposits a thin layer of silver onto a copper surface through a displacement reaction. This results in a smooth surface with good conductivity and solderability. The Giavani effect refers to the phenomenon where, due to a potential difference between two metals, electrons flow through the medium, generating an electric current and subsequently causing an electrochemical reaction, leading to the oxidation of the anode with the higher potential. During the chemical silver plating process on PCBs, the Giavani effect is more likely to occur in areas where the chemical solution cannot reach.

[0003] Currently, there exists a type of irregularly shaped PCB board, such as... Figure 1 As shown, the PCB board is corner-shaped, with the middle positions at both ends and the outer ends at the corners being non-functional areas that can be clamped and fixed. Currently, there is no auxiliary reaction device that can fix and rotate this corner-shaped PCB board, which is detrimental to the uniformity of the reaction on the PCB board. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a chemical silver deposition auxiliary reaction device. This device can clamp and fix the corner-shaped PCB board mentioned in the background technology at intervals, and can rotate, which facilitates full contact with the liquid and uniform reaction, effectively solving the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a chemical silver deposition auxiliary reaction device, comprising a clamping mechanism, the clamping mechanism comprising corner-shaped clamping plates arranged at intervals, the clamping plates having vertical fixing plates on both ends, and fastening bolts screwed through from the outside to the inside at the middle position and the outer end of the corner of both ends of the clamping plates respectively.

[0006] The outer side of the fixed plate is coaxially fixed with rotating shafts, and the outer ends of the rotating shafts are respectively sealed and rotatably connected to the silver melting tank. One side of the rotating shaft extends out of the silver melting tank and is connected to the drive motor.

[0007] As a preferred technical solution, the vertical projected area of ​​the clamping plate is larger than the area of ​​the corner-shaped PCB board.

[0008] As a preferred technical solution, locking nuts are provided on the outer side of each fastening bolt.

[0009] As a preferred technical solution, the inner ends of the fastening bolts are respectively pointed.

[0010] As a preferred technical solution, the inner end face of the rotating shaft is inclined at 45 degrees and is welded and fixed to the fixing plate.

[0011] As a preferred technical solution, the outer surface of the outer end of the corner of the clamping plate is also provided with an auxiliary fixing plate for connecting the upper and lower clamping plates.

[0012] Compared with the prior art, this utility model provides a chemical silver precipitation auxiliary reaction device, which has the following beneficial effects:

[0013] 1. This utility model includes a clamping mechanism comprising corner-shaped clamping plates spaced vertically. Both ends of the clamping plates are provided with vertical fixing plates. Fastening bolts are screwed through from the outside to the inside at the middle position of both ends of the clamping plates and the outer end of the corners. In use, the corner-shaped PCB board is placed between the upper and lower clamping plates and clamped and fixed by the fastening bolts at the three locations, so that the PCB board can be positioned vertically. A gap is left between the PCB board and the upper and lower clamping plates, which is conducive to the silver immersion reaction.

[0014] 2. This utility model has a rotating shaft coaxially fixed on the outer side of the fixing plate. The two ends of the rotating shaft are respectively sealed and rotatably connected to the silver plating tank. One side of the rotating shaft extends out of the silver plating tank and is connected to the drive motor. In use, the drive motor can drive the rotating shaft and the clamping plate to rotate, so that the PCB board can contact the solution more evenly, which is beneficial to the uniformity of the final silver plating.

[0015] 3. This utility model has locking nuts on the outside of the fastening bolts and the inner ends of the fastening bolts are pointed. In use, the locking nuts can prevent the fastening bolts from loosening, and the pointed structure can reduce the contact area with the PCB board.

[0016] 4. The present invention also provides an auxiliary fixing plate on the outer surface of one side of the outer end of the corner of the clamping plate to connect the upper and lower clamping plates. When in use, the auxiliary fixing plate can increase the firmness of the corner of the clamping plate and facilitate the clamping and fixing of the PCB board by the fastening bolts. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0018] Figure 1 This is a schematic diagram of a three-dimensional structure of a corner-shaped PCB board.

[0019] Figure 2 This is a three-dimensional structural diagram of the first embodiment of the present invention (the front side plate of the silver melting tank is not shown).

[0020] Figure 3 This is a schematic diagram of the split structure of the clamping mechanism;

[0021] Figure 4 This is a usage diagram of the first embodiment (the front side panel of the silver melting tank is not shown).

[0022] Figure 5 This is a three-dimensional structural diagram of the second embodiment of the present invention (the front side plate of the silver melting tank is not shown).

[0023] The diagram shows: 1. PCB board; 2. Clamping mechanism; 21. Clamping plate; 22. Fixing plate; 23. Fastening bolt; 24. Locking nut; 3. Rotating shaft; 4. Silver melting tank; 5. Drive motor; 6. Auxiliary fixing plate. 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. Example 1

[0025] like Figures 1 to 4 As shown, a chemical silver deposition auxiliary reaction device includes a clamping mechanism 2. The clamping mechanism 2 includes corner-shaped clamping plates 21 arranged at intervals. Both ends of the clamping plates 21 are provided with vertical fixing plates 22. Fastening bolts 23 are screwed through from the outside to the inside at the middle position of both ends of the clamping plates 21 and at the outer end of the corners. The fastening bolts 23 are respectively connected to the clamping plates 21 with damping threads.

[0026] The outer side of the fixed plate 22 is coaxially fixed with rotating shafts 3. The outer ends of the rotating shafts 3 are respectively sealed and rotatably connected to the silver melting tank 4. One side of the rotating shaft 3 extends out of the silver melting tank 4 and is connected to the drive motor 5. The drive motor 5 is electrically connected to the distribution box (not shown) through the line.

[0027] The vertical projected area of ​​the clamping plate 21 is larger than the area of ​​the corner-shaped PCB board 1, thus leaving a gap between the PCB board 1 and the fixing plate 22.

[0028] Locking nuts 24 are provided on the outer side of the fastening bolts 23.

[0029] The inner ends of the fastening bolts 23 are pointed.

[0030] The inner end face of the rotating shaft 3 is inclined at 45 degrees and is welded and fixed to the fixing plate 22.

[0031] In use, the corner-shaped PCB board 1 is placed between the upper and lower clamping plates 21 and clamped and fixed by three fastening bolts 23, allowing the PCB board 1 to be positioned vertically. A gap is left between the PCB board 1 and the upper and lower clamping plates 21 to facilitate the silver immersion reaction. The drive motor 5 drives the rotating shaft 3 and the clamping plates 21 to rotate, allowing the PCB board 1 to contact the solution more evenly, thus improving the uniformity of the final silver immersion. The locking nut 24 prevents the fastening bolts 23 from loosening, and its pointed structure reduces the contact area with the PCB board 1. Example 2

[0032] like Figure 5 As shown, an auxiliary fixing plate 22 connecting the upper and lower clamping plates 21 is also provided on the outer surface of one side of the outer end of the corner of the clamping plate 21.

[0033] When in use, the auxiliary fixing plate 22 can increase the firmness of the corner of the clamping plate 21, which is conducive to the clamping and fixing of the PCB board 1 by the fastening bolt 23.

[0034] The components used in this utility model are all general standard parts or components known to those skilled in the art, and their structures and principles are well known to those skilled in the art.

[0035] It should be noted that, in this document, the terms "first," "second," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0036] The structures, proportions, sizes, etc. shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which this utility model can be implemented. Any modification of the structure, change of the proportions, or adjustment of the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chemical silver immersion auxiliary reaction apparatus, characterized in that: The clamping mechanism includes corner-shaped clamping plates spaced apart vertically. Both ends of the clamping plates are provided with vertical fixing plates. Fastening bolts are screwed through from the outside to the inside at the middle position of both ends and the outer end of the corner of the clamping plates. The outer side of the fixed plate is coaxially fixed with rotating shafts, and the outer ends of the rotating shafts are respectively sealed and rotatably connected to the silver melting tank. One side of the rotating shaft extends out of the silver melting tank and is connected to the drive motor.

2. The chemical silver deposition auxiliary reaction apparatus according to claim 1, characterized in that: The vertical projected area of ​​the clamping plate is larger than the area of ​​the corner-shaped PCB board.

3. The chemical silver deposition auxiliary reaction apparatus according to claim 1, characterized in that: Locking nuts are provided on the outer side of each fastening bolt.

4. The chemical silver deposition auxiliary reaction apparatus according to claim 1, characterized in that: The inner ends of the fastening bolts are pointed.

5. The chemical silver deposition auxiliary reaction apparatus according to claim 1, characterized in that: The inner end face of the rotating shaft is inclined at 45 degrees and is welded and fixed to the fixing plate.

6. The chemical silver deposition auxiliary reaction apparatus according to claim 1, characterized in that: An auxiliary fixing plate connecting the upper and lower clamping plates is also provided on the outer surface of one side of the outer end of the corner of the clamping plate.

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