Roller for improving exchange capacity of plating solution

Abstract

The invention belongs to the technical field of electroplating, and particularly relates to a roller for improving the exchange capacity of a plating solution. The roller comprises N bottom plates and two side plates, n is a positive integer greater than or equal to 3; the N bottom plates are connected and welded into a cylindrical structure, and the same side of each bottom plate partially extends out to form N hydrofoils; the two side plates are respectively welded with the N bottom plates; the N bottom plates and the two side plates form a roller; the liquid exchange capacity inside and outside the roller is improved, the uniformity of the plating solution is improved, the plating quality and efficiency are improved, meanwhile, the cleaning quality and efficiency of the cleaning step are also helped, and good application prospects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of electroplating, and in particular relates to a roller for improving the exchange capacity of plating solution. Background Art

[0002] Roller plating is a common plating method in the electroplating industry. The diameter of the opening on the wall of the plating roller must be smaller than the size of the workpiece. The opening size of some rollers used in the electronics industry is as small as 0.5mm. This causes: during plating, the plating solution inside and outside the roller is exchanged, and the concentration of the plating solution is uneven, which affects the uniformity and efficiency of plating; during cleaning, the liquid inside and outside the roller is not smooth, which affects the cleanliness and efficiency of cleaning. To solve this problem, the traditional method uses a plating tank plus a pump. However, this method uses a gas / liquid circulation method to promote the exchange of liquid in a relatively closed roller. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a roller for improving the exchange capacity of plating solution, the roller comprising: N bottom plates and two side plates; N is a positive integer greater than or equal to 3; the N bottom plates are connected and welded into a cylindrical structure, and each bottom plate has a portion extending out on the same side to form N hydrofoils; the two side plates are respectively welded to the N bottom plates; the N bottom plates and the two side plates form a roller.

[0004] Preferably, the areas of the N hydrofoils are equal.

[0005] Preferably, the N bottom plates and the two side plates are each provided with a plurality of drainage holes smaller than the plated workpieces.

[0006] Preferably, reinforcing ribs are provided on the N bottom plates.

[0007] Preferably, reinforcement frames are provided on the two side panels.

[0008] Preferably, it also includes: at least one through-flow hole, wherein the through-flow hole is arranged on N bottom plates or side plates.

[0009] Furthermore, it also includes a flow hole cover embedded with the flow hole.

[0010] The beneficial effects of the present invention are as follows: compared with the traditional roller, especially for the precision electroplating of small parts, the present invention uses a simple structure, adds a hydrofoil on the basis of the traditional roller, and uses the self-rotation power of the roller to promote the active circulation of the liquid inside and outside the roller. At the same time, holes are opened on the side walls at both ends of the roller to drain the liquid, thereby improving the liquid exchange capacity inside and outside the roller, improving the uniformity of the plating solution, and improving the plating quality and efficiency. At the same time, it is also helpful for the cleaning quality and efficiency of the cleaning step, and has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The three-dimensional diagram and the physical diagram of the drum in the present invention;

[0012] Figure 2 It is a schematic diagram of the drum rotation process in the present invention;

[0013] Figure 3 It is a schematic diagram of the exchange of plating solutions inside and outside the drum in the present invention. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The present invention proposes a roller for improving the exchange capacity of plating solution, such as Figure 1 As shown, the drum comprises: N bottom plates and two side plates; N is a positive integer greater than or equal to 3; the N bottom plates are connected and welded into a cylindrical structure, and each bottom plate has a portion extending out on the same side to form N hydrofoils; the two side plates are respectively welded to the N bottom plates; the N bottom plates and the two side plates form a drum. Preferably, the areas of the N hydrofoils are equal.

[0016] When the drum rotates in a certain direction, the hydrofoil paddles the liquid, forming a pressure difference between the inside and outside of the drum at the junction of the mesh plate, forcing the liquid to flow into the drum.

[0017] In some preferred embodiments, N is 6. In this case, the drum is welded together by 6 bottom plates into a cylindrical structure, and each bottom plate has a part extending out on the same side to form 6 hydrofoils; the two side plates are welded to the 6 bottom plates respectively; the 6 bottom plates and the two side plates form a drum. The more sides there are, the closer it is to a circular drum, the more products can be loaded (generally 1 / 3 of the drum volume is loaded), and the more stable the plated parts roll in the drum; the fewer sides there are, the fewer products can be loaded, the more irregular the plated parts can roll, and the more conducive to improving the uniformity of the coating. When N is 6, both the loading capacity and the sufficient rolling of the plated parts can be taken into account.

[0018] like Figure 2 , Figure 3 As shown in the figure, the N bottom plates and the two side plates are all provided with a number of drainage holes smaller than the plated workpieces. When the drum rotates in a certain direction, the hydrofoil paddles the liquid to increase the pressure inside the drum, breaking the hydraulic balance inside and outside the side wall, forcing the liquid to flow out of the drum, forming a single cycle of water entering the drum wall and water exiting the side wall, thereby promoting the exchange of liquid inside and outside the drum.

[0019] Preferably, the drum opening area can be maximized, that is, drainage holes are also added at the overlap area. Through this design, the drainage efficiency of the drum when leaving the plating solution can be improved.

[0020] In some preferred embodiments, N bottom plates are provided with reinforcing ribs, and two side plates are provided with reinforcing frames. By designing reinforcing ribs in the middle of the bottom plate through holes and adding reinforcing frame structures to the side plates, the risk of deformation of the equipment due to long-term operation is reduced.

[0021] In some preferred embodiments, the drum further comprises at least one through-flow hole, which is arranged on N bottom plates or side plates and is provided with a through-flow hole cover engaged with the through-flow hole.

[0022] During the operation of the plating tank, the roller designed in the present invention rotates itself, and the plating solution in the plating tank enters the roller through the hydrofoil formed by the bottom plate extending from the overlapped part of the mesh plate. The plating solution enters through the bottom plate and flows out through the holes of the side plate, and the cycle is repeated. Precision electroplating of small parts can be achieved.

[0023] In summary, the present invention uses a simple structure and the power of the drum's rotation to promote the active circulation of liquid inside and outside the drum; compared with traditional drums, especially the precision electroplating of small parts, the advantages of the present invention are reflected in the two aspects of improving the uniformity of the coating and the efficiency of electroplating. The Ppk value of the coating thickness is increased from 0.8 to 2.0, which greatly improves the uniformity of the coating; the electroplating efficiency is reflected in the exchange of the plating solution. Under the premise of plating the same coating thickness, the electroplating time can be reduced by about 20%. At the same time, the quality of all steps in the electroplating process, such as degreasing and activation, can be improved by promoting the circulation of liquid inside and outside the drum, and the post-plating cleaning effect is also greatly improved, and the proportion of product dirtiness is reduced from 1% to 0.25%.

[0024] The above embodiments further illustrate the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above embodiments are only preferred implementation modes of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller for improving the exchange capacity of plating solution, characterized in that: include: N bottom panels and two side panels; N is a positive integer greater than or equal to 3; N bottom plates are connected and welded to form a cylindrical structure, and each bottom plate has a portion extending out on the same side to form N hydrofoils; two side plates are respectively welded to the N bottom plates; the N bottom plates and the two side plates form a drum.

2. A roller for improving the exchange capacity of plating solution according to claim 2, characterized in that: The areas of the N hydrofoils are equal.

3. A roller for improving the exchange capacity of plating solution according to claim 1, characterized in that: The N bottom plates and the two side plates are all provided with a plurality of drainage holes which are smaller than the plated workpieces.

4. A roller for improving the exchange capacity of plating solution according to claim 1, characterized in that: Reinforcing ribs are arranged on the N bottom plates.

5. The roller for improving the exchange capacity of plating solution according to claim 1, characterized in that: Reinforcement frames are arranged on the two side panels.

6. A roller for improving the exchange capacity of plating solution according to claim 1, characterized in that: Also includes: At least one through-flow hole is provided on N bottom plates or side plates.

7. A roller for improving the exchange capacity of plating solution according to claim 6, characterized in that: Also included is a through-hole cover engaged with the through-hole.

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