Continuous CPU local tin brushing manufacturing tool

Abstract

The utility model belongs to the technical field of electroplating mold tools, and particularly relates to a continuous CPU local tin brushing tool which comprises a tool body, a water inlet pipe, a conducting rod and a water outlet plate. The water inlet pipe is provided with a water inlet, the water inlet is communicated with the manufacturing tool body, the conducting rod is connected to the outer side of the water inlet pipe and connected with the manufacturing tool body, the water outlet plate is connected to the side face of the manufacturing tool body and arranged on one side of the conducting rod, the water outlet plate is provided with a plurality of water outlet holes, the water outlet holes are evenly formed in the water outlet plate, the hole diameter of the water outlet holes is 1.5 mm, and the hole distance is 2 mm. According to the continuous CPU local tin brushing tool provided by the invention, the liquid level fluctuation is eliminated through uniformly distributed water outlet holes and flow control; a high-precision tin plating area of 0.35-0.45 mm is realized by adapting to a three-dimensional CPU terminal structure; the structure is reasonable, the production cost is reduced, and the continuous tinning efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electroplating mold making technology, and in particular relates to a continuous CPU local brush tin plating mold. Background Technology

[0002] Tin is a hazy white metal with a relative atomic mass of 118.87, a relative density of 7.28 g / cm³, a melting point of 232℃, and a hardness of approximately 12 HV. The outermost electron configuration of tin is 4d¹⁰⁵s²⁵p². When electrons in the outermost p orbitals participate in a reaction, the tin ion exhibits a +2 valence; if the two electrons in the s shell also participate, it exhibits a +4 valence. Its conductivity is 9.09 MS / m. The standard potentials are φ₀Sn²⁺ / Sn = -0.136 V and φ₀Sn⁴⁺ / Sn²⁺ = 0.15 V, with an electrochemical equivalent of Sn²⁺ of 2.214 g / (A·h).

[0003] Tin plating is widely demanded across various fields, primarily due to tin's properties, such as: ① Corrosion resistance: At room temperature, tin readily forms a dense oxide film (SnO2) on its surface, effectively resisting corrosion from water, atmosphere, and weak acids and alkalis; ② Solderability: Tin has a low melting point (232℃) and good fluidity after melting, forming reliable solder joints, making it an ideal material for electronic soldering; ③ Low toxicity: Tin is non-toxic and meets food contact safety standards, making it suitable for food packaging and medical devices; ④ Ductility and lubricity: Tin is soft, and the plating layer can evenly cover substrates with complex shapes while reducing friction, making it suitable for precision mechanical parts; ⑤ While its conductivity is not as high as silver or copper, as a plating layer, it can protect the conductivity of the substrate (such as copper) while preventing oxidation. Based on these physical and chemical properties of tin, electroplated tin products are mainly used in printed circuit boards, connectors / terminals, semiconductor packaging, wire harnesses and electronic components, and photovoltaic modules.

[0004] With the acceleration of CPU localization, electroplating plays a crucial intermediate processing role in the domestic production of CPU basic components. To ensure the stability of CPU signal transmission and its lifespan, CPU terminals typically employ localized gold plating. In applications, thousands of CPU terminals need to be assembled and soldered onto the CPU board, thus placing extremely high demands on their soldering performance. Firstly, solderability must be guaranteed; secondly, the soldering area must not exceed a set value, typically within 0.35~0.45mm. To ensure solderability, a localized tin plating process is used. Because it is continuous electroplating, traditional immersion plating and selective plating cannot meet the 0.35~0.45mm tin plating area requirement due to liquid level fluctuations. Furthermore, CPU terminals are often three-dimensional, making spot plating molds impractical; therefore, other processes must be employed to meet this requirement. This invention addresses this need. Utility Model Content

[0005] The purpose of this invention is to provide a continuous CPU local brush tin plating fixture, which aims to solve the technical problems that traditional immersion plating and selective plating in the prior art cannot meet the tin plating area requirement of 0.35~0.45mm due to liquid level fluctuations; in addition, CPU terminal products are mostly three-dimensional and cannot be processed by spot plating molds, so other processes must be adopted to meet this requirement.

[0006] To achieve the above objectives, the present invention provides a continuous CPU partial brush tin plating fixture, comprising a fixture body, a water inlet pipe, a conductive rod, and a water outlet plate. The water inlet pipe is connected to the end of the fixture body and has a water inlet that is connected to the fixture body. The conductive rod is connected to the outside of the water inlet pipe and to the fixture body. The water outlet plate is connected to the side of the fixture body and is disposed on one side of the conductive rod. The water outlet plate has multiple water outlet holes that are evenly distributed on the water outlet plate. The diameter of each water outlet hole is 1.5 mm, and the spacing between the holes is 2 mm.

[0007] As an optional solution of this utility model, there are two water inlet pipes, both of which are fixedly connected to the end of the fixture body, and each water inlet pipe is provided with a water inlet.

[0008] As an optional embodiment of this utility model, there are two conductive rods and two water inlet pipes. The conductive rods are fixedly connected to the outside of the water inlet pipes and fixedly connected to the fixture body.

[0009] As an optional solution of this utility model, the water outlet plate is provided with screw fixing holes, and there are multiple screw fixing holes, which are arranged on one side of the water outlet hole. The water outlet plate is fixed to the fixture body through the screw fixing holes.

[0010] As an optional solution of this utility model, the fixture body is arranged in a trapezoidal shape.

[0011] The above-mentioned technical solutions in the continuous CPU partial brush tin plating fixture provided in this embodiment of the utility model have at least one of the following technical effects:

[0012] The continuous CPU local brush tin plating fixture provided in this application eliminates liquid level fluctuations through uniformly distributed water outlets and flow control; it achieves a high-precision tin plating area of ​​0.35~0.45mm by adapting to the three-dimensional CPU terminal structure; the structure of this application is reasonable, reduces production costs, and improves continuous tin plating efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A front view of a continuous CPU partial brush tin plating fixture provided for an embodiment of this utility model.

[0015] Figure 2 A perspective view of a continuous CPU partial brush tin plating fixture provided for an embodiment of this utility model.

[0016] Figure 3 A perspective view of a continuous CPU partial brush tin plating fixture provided for an embodiment of this utility model.

[0017] The following are the labeling elements in the figure:

[0018] 1. Water inlet; 2. Conductive rod; 3. Water outlet; 4. Screw fixing hole; 5. Water outlet plate; 6. Tool body. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0020] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0023] In one embodiment of this utility model, such as Figures 1-3 As shown, a continuous CPU partial brush tin plating fixture is provided, including a fixture body 6, a water inlet pipe, a conductive rod 2, and a water outlet plate 5. The water inlet pipe is connected to the end of the fixture body 6 and has a water inlet 1, which is connected to the fixture body 6. The conductive rod 2 is connected to the outside of the water inlet pipe and is connected to the fixture body 6. The water outlet plate 5 is connected to the side of the fixture body 6 and is located on one side of the conductive rod 2. The water outlet plate 5 has multiple water outlet holes 3, which are evenly distributed on the water outlet plate 5. The diameter of the water outlet holes 3 is 1.5 mm, and the spacing between the holes is 2 mm. There are two water inlet pipes, both fixedly connected to the end of the fixture body 6, and each water inlet pipe has a water inlet 1. There are two conductive rods, the same as the number of water inlet pipes. The conductive rods 2 are fixedly connected to the outside of the water inlet pipe and are fixedly connected to the fixture body 6. The water outlet plate 5 is provided with screw fixing holes 4. There are multiple screw fixing holes 4, which are located on one side of the water outlet 3. The water outlet plate 5 is fixed to the fixture body 6 through the screw fixing holes 4. The fixture body 6 is trapezoidal in shape.

[0024] The continuous CPU local brush tin plating fixture provided in this application eliminates liquid level fluctuations through uniformly distributed water outlet holes 3 and flow control; by adapting to the three-dimensional CPU terminal structure, it achieves a high-precision tin plating area of ​​0.35~0.45mm; the structure of this application is reasonable, reduces production costs, and improves continuous tin plating efficiency.

[0025] This application provides a continuous CPU partial brush tin plating fixture, comprising two inlets 1, which are wrapped with silicone tubes. Tin plating solution enters the brush tin plating fixture through the inlets 1 and exits through outlet holes 3, which are evenly distributed across a water outlet plate 5. The outlet holes 3 have a diameter of 1.5 mm and a spacing of 2 mm. The water outlet plate 5 is fixed to the brush tin plating fixture using screw holes 4. A special brush cloth is used to apply the tin plating solution through the inlets 1, ensuring even wetting of the brush cloth through the outlet holes 3. The flow rate of the outlet holes 3 is controlled by a frequency converter; a higher flow rate results in faster solution exchange (within the operable current density range) and higher plating efficiency. During production, the anode is clamped to the conductive rod 2 by a mechanical fixture. The brush-plating tin fixture of this application acts as the electroplating anode during energization, while the CPU product acts as the electroplating cathode. The brush cloth serves as an insulating material to prevent short circuits caused by contact between the anode and cathode. The plating solution exiting from the outlet hole 3 is deposited directionally and evenly onto the electroplating area of ​​the product. During production, the anode is clamped to the conductive rod 2 by a mechanical fixture, making the brush-plating tin fixture act as the electroplating anode during energization, while the CPU product acts as the electroplating cathode. At this time, after the external power supply is turned on, a closed circuit is formed, and current flows from the anode through the plating solution to the cathode, providing driving force for the tin plating process. The brush cloth, as a crucial insulating material, effectively prevents direct contact between the anode and cathode, avoiding short circuits and ensuring that current is conducted only through the plating solution between the anode and cathode, guaranteeing a safe and stable electroplating process. The plating solution flows into the fixture body 6 from the inlet pipe and is directionally sprayed out through the evenly distributed outlet holes 3 on the outlet plate 5, precisely covering the area of ​​the CPU product to be plated. Under the influence of an electric field, tin ions in the plating solution move toward the cathode (CPU product) and gain electrons on its surface, undergoing a reduction reaction, thereby uniformly depositing and forming a tin plating layer.

[0026] The continuous CPU local brush tin plating fixture provided in this application eliminates liquid level fluctuations through uniformly distributed water outlet holes 3 and flow control; by adapting to the three-dimensional CPU terminal structure, it achieves a high-precision tin plating area of ​​0.35~0.45mm; the structure of this application is reasonable, reduces production costs, and improves continuous tin plating efficiency.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous CPU localized brush tin plating fixture, characterized in that, The tool includes a tool body, a water inlet pipe, a conductive rod, and a water outlet plate. The water inlet pipe is connected to the end of the tool body and has a water inlet that is connected to the tool body. The conductive rod is connected to the outside of the water inlet pipe and is connected to the tool body. The water outlet plate is connected to the side of the tool body and is located on one side of the conductive rod. The water outlet plate has multiple water outlet holes that are evenly distributed on the water outlet plate. The diameter of each water outlet hole is 1.5 mm and the spacing between the holes is 2 mm.

2. The continuous CPU partial brush tin plating fixture according to claim 1, characterized in that, There are two water inlet pipes, both of which are fixedly connected to the end of the fixture body, and each water inlet pipe is provided with a water inlet.

3. A continuous CPU partial brush tin plating fixture according to claim 2, characterized in that, There are two conductive rods and two water inlet pipes. The conductive rods are fixedly connected to the outside of the water inlet pipes and to the fixture body.

4. A continuous CPU partial brush tin plating fixture according to claim 1, characterized in that, The water outlet plate is provided with screw fixing holes, and there are multiple screw fixing holes, which are located on one side of the water outlet. The water outlet plate is fixed to the fixture body through the screw fixing holes.

5. A continuous CPU partial brush tin plating fixture according to claim 1, characterized in that, The fixture body is trapezoidal in shape.

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