Wire core with anti-falling coating

Abstract

The utility model relates to the technical field of cables, in particular to a wire core main body with an anti-falling coating. The utility model relates to a wire core main body with an anti-falling coating. The wire core main body comprises a core wire and a side wire. A plurality of side wires are arranged in the circumferential direction of the core wire, the side wires are uniformly spaced, and grooves are formed among different side wires. The outer layer of the wire core main body is provided with a tin plating layer, and the tin plating layer fills the groove. And a nickel plating layer is arranged on the outer layer of the tin plating layer. The bonding effect of the tin plating layer and the wire core main body is stable, the tin plating layer is protected through the wear resistance of the nickel plating layer, the plating layer of the wire core main body is effectively prevented from falling off, and the stable form of the wire core main body is kept.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a wire core with a coating that prevents peeling. Background Technology

[0002] With the rapid development of the electronics and electrical industry, the performance requirements for cables are becoming increasingly stringent. As the core conductive component of a cable, the performance of the conductor directly affects the cable's transmission efficiency, lifespan, and safety. Traditional conductors often use single-metal materials such as copper or aluminum. While these materials offer good conductivity, they lack resistance to corrosion, abrasion, and oxidation, making them unsuitable for increasingly demanding operating environments. To overcome the limitations of single-metal conductors, plating technology has emerged. By plating other metals or alloys onto the surface of the conductor, the overall performance of the conductor can be significantly improved.

[0003] However, traditional plating processes suffer from poor adhesion and easy peeling, severely impacting the lifespan and reliability of the wire core. Plating peeling leads to decreased conductivity, increased contact resistance, and can even cause short circuits, fires, and other safety hazards. The stability of the plating is related to factors such as the bonding strength between the plating metal and the wire core substrate, as well as the wear resistance of the plating metal. Therefore, improving the bonding strength between the plating and the wire core substrate and preventing plating peeling has become a critical technical challenge that urgently needs to be addressed in the wire core manufacturing industry. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A wire core with anti-detachment plating includes a wire core body, which includes core wires and side wires. Multiple side wires are arranged circumferentially around the core wires, with evenly spaced side wires forming grooves between them. The outer layer of the wire core body is coated with a tin plating layer that fills the grooves. A nickel plating layer is then applied to the outer layer of the tin plating layer.

[0006] Furthermore, the thickness of the tin plating layer is 3.5μm~6.2μm, and the thickness of the nickel plating layer is 1.5μm~3.2μm.

[0007] Furthermore, the side wires are twisted on the outer peripheral wall of the core wire in a clockwise or counterclockwise direction, and the grooves are spiral-shaped.

[0008] Furthermore, the pitch of the groove is 3mm~5mm, and the depth of the groove is 0.2mm~0.5mm.

[0009] Furthermore, multiple micropores are arranged in an array on the side of the side wire away from the core wire, and the tin plating layer fills the micropores.

[0010] Furthermore, the depth of the micropores is 20μm~50μm, the micropores are conical, and the diameter of the micropores decreases with increasing depth, with a maximum diameter of 5μm.

[0011] Furthermore, a nano-hydrophobic layer is provided on the inner wall of the micropore and the outer surface of the side wire away from the core wire, with a thickness of 2μm~5μm.

[0012] Furthermore, the bonding surfaces of the tin plating and nickel plating are frosted.

[0013] Furthermore, hard particles are uniformly distributed on the surface of the nickel plating layer, and the hard particles and the nickel plating layer form a hard layer with a thickness of 0.5μm~1.2μm.

[0014] Furthermore, an anti-corrosion layer with a thickness of 2μm to 3μm is plated on the outer wall of the nickel plating.

[0015] The beneficial effects of this invention are: by increasing the surface roughness of the wire core body through the grooves between the side wires, more adhesion points are provided for the plating, improving the adhesion between the plating and the substrate and preventing the tin plating from peeling off the surface of the wire core body. The good wear resistance of the nickel plating is utilized to prevent it from peeling off due to wear. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] The labels in the attached diagram are as follows: 1. Core body; 2. Tin plating; 3. Nickel plating; 11. Core wire; 12. Side wire; 121. Groove; 122. Micropore; 123. Inner plane; 124. Side plane; 125. Outer arc surface; 21. Frosted surface; 31. Hard layer; 32. Anti-corrosion layer.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, provided that they are feasible for those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Please see Figures 1-3 A wire core body 1 with anti-detachment plating includes a wire core body 1, which includes a core wire 11 and side wires 12. Multiple side wires 12 are arranged circumferentially around the core wire 11, and the multiple side wires 12 are evenly spaced to enhance the mechanical strength of the wire core body 1 and reduce the risk of deformation and breakage. The outer layer of the wire core body 1 is provided with a tin plating layer 2. Copper and tin have good adhesion; plating the tin onto the surface of the wire core body 1 can form a plating layer with stable adhesion.

[0026] Multiple side wires 12 are twisted around the core wire 11 in the circumferential direction, and then drawn to form the core body 1. After drawing, the core wire 11 has a polygonal cross-section, the inner plane 123 of the side wires 12 is in contact with the side of the core wire 11, and the side planes 124 of adjacent side wires 12 are in contact with each other. This greatly improves the tightness of the connection between the side wires and the core wire 11, reduces the gaps between adjacent wires and between the side wires 12 and the core wire 11, and improves the efficiency of the core body 1 in transmitting electrical signals. At the same time, it ensures the stability of the core body 1 structure, avoids the plating from falling off due to the loosening of the core body 1 structure, and improves the durability of the tin plating 2. The side of the side wire 12 away from the inner plane 123 is provided with an outer arc surface 125, and the outer arc surfaces 125 of multiple side wires 12 are tangent to the same circle. This keeps the core surface smooth and regular, making it more aesthetically pleasing, and also facilitates the uniform coverage of the tin plating 2 on the outer arc surface 125. A groove 121 is formed between the outer arc surfaces 125 of adjacent side wires 12, and the tin plating layer 2 covers the outer arc surfaces 125 and fills the groove 121. The groove 121 increases the contact area between the tin plating layer 22 and the wire core body 11, further strengthening the bonding force between the tin plating layer 22 and the wire core body 11.

[0027] The tin plating layer 2 has a thickness of 3.5μm to 6.2μm. Tin plating layer 2 possesses good conductivity and corrosion resistance, protecting the core body 1 from environmental corrosion. The thickness of tin plating layer 2 is controlled between 3.5μm and 6.2μm, providing sufficient protection for the core body 1 while ensuring the uniformity and continuity of the tin plating layer 2, effectively filling the trench 121, ensuring a tight fit between the plating layer and the core body 1, without excessively increasing the weight and cost of the core body 1. Nickel plating layer 3 is located outside the tin plating layer 2, possessing higher hardness and wear resistance, further protecting the core body 1 from mechanical damage. The thickness of nickel plating layer 3 is controlled between 1.5μm and 3.2μm, ensuring wear resistance while avoiding increased brittleness due to excessive plating thickness, maintaining the overall flexibility of the core body 1.

[0028] Side wires 12 are twisted clockwise or counterclockwise around the outer periphery of the core wire 11. The spiral twisting of the side wires 12 increases the wire's flexibility and resistance to kinking. The grooves 121 are spiral-shaped following the winding pattern of the side wires 12, increasing the length of the grooves 121 per unit length of the core body 1, thus facilitating a larger contact area between the tin plating layer 2 and the grooves 121. The pitch of the grooves 121 is 3mm to 5mm. A 3mm pitch may result in a tighter structure, increasing strength and abrasion resistance, while a 5mm pitch may improve the flexibility of the core body 1 but may reduce strength. Choosing a range of 3-5mm strikes a balance between the two, balancing flexibility and strength. The depth of the grooves 121 is 0.2mm to 0.5mm, increasing the contact area between the plating layer and the core body 1 without affecting the conductivity of the core body 1 due to excessive depth.

[0029] Multiple micro-holes 122 are arranged in an array on the side of the side wire 12 away from the core wire 11 using a laser device, and a tin plating layer 2 fills the micro-holes 122. The depth and diameter of the micro-holes 122 can be significantly adjusted by increasing or decreasing the output power of the laser device. When the laser power increases, the laser energy density increases, the material removal rate increases, resulting in deeper micro-holes 122 and larger diameters; conversely, decreasing the laser power reduces the amount of material removed, resulting in shallower micro-holes 122 with smaller diameters. This adjustment method can flexibly meet the requirements of different application scenarios for the size of the micro-holes 122. Furthermore, changing the angle at which the laser is incident on the surface of the side wire 12 can adjust the orientation of the micro-holes 122. When the laser is incident perpendicularly, the micro-holes 122 are vertically oriented. This structure facilitates plating filling, provides a good mechanical locking effect, and enhances the adhesion between the plating layer and the substrate. When the laser is incident at a certain angle, the micro-orifice 122 is tilted, which significantly increases the contact area between the coating and the substrate, further improving the adhesion and peel resistance of the tin coating 2. The tin coating 2 filling the tilted micro-orifice 122 enhances its shear resistance, making it suitable for applications with high mechanical performance requirements. By optimizing the laser power and incident angle, the size and orientation of the micro-orifice 122 can be precisely controlled, thereby achieving precise control over the coating adhesion performance and meeting the needs of various industrial applications.

[0030] The micropores 122 increase the contact area between the tin plating layer 2 and the wire core body 1, effectively improving the adhesion between them. The micropores 122 are tapered, with their diameter decreasing as the depth increases. This tapered design increases the contact area between the tin plating layer 2 and the side wires 12, forming a mechanical interlocking structure that significantly improves adhesion. After the tin plating layer 2 fills the micropores 122, it creates an "anchoring effect," preventing plating peeling. The depth of the micropores 122 is 20μm~50μm, which reasonably increases the contact area between the tin plating layer 2 and the wire core body 1 while minimizing the impact on the strength or conductivity of the wire core body 1. The maximum diameter of the micropores 122 is 5μm, which does not affect the tin plating layer 2 filling the internal space of the micropores 122, nor does it excessively affect the conductivity of the wire core body 1. A nano-hydrophobic layer is provided on the inner wall of the micropore 122 and the outer surface of the side wire 12 away from the core wire 11. This nano-hydrophobic layer covers the inner wall of the micropore 122 and the outer surface of the side wire 12, effectively preventing the intrusion of moisture, humidity, or corrosive substances, maintaining the smoothness of the core body 1 surface, and improving the adhesion between the nickel plating layer 3 and the core body 1. The low surface energy of the hydrophobic layer reduces the interfacial stress between the plating layer and the side wire 12, preventing the plating layer from cracking or peeling due to stress concentration. Common materials for the nano-hydrophobic layer include fluorides such as polytetrafluoroethylene and perfluoroalkyl compounds, or metal oxides such as titanium oxide and zinc oxide. When the thickness of the nano-hydrophobic layer is between 2μm and 5μm, the hydrophobic layer can uniformly cover the substrate surface, ensuring a strong bond between the plating layer and the substrate, without significantly increasing the rigidity of the core body 1.

[0031] The bonding surface between the tin plating layer 2 and the nickel plating layer 3 is a frosted surface 21. The frosted surface 21 increases the contact area between the tin plating layer 2 and the nickel plating layer 3, improving their bonding strength and thus further enhancing the overall durability of the plating. Hard particles are uniformly distributed on the surface of the nickel plating layer 3, forming a hard layer 31. The hard layer 31 further improves the physical wear resistance of the nickel plating layer 3, extending its service life and optimizing its protective effect on the tin plating layer 2. The thickness of the hard layer 31 is 0.5μm~1.2μm, ensuring sufficient protection for the nickel plating layer 3 without excessive manufacturing costs. An anti-corrosion layer 32 is plated on the outer wall of the nickel plating layer 3. This layer effectively prevents corrosion of the nickel plating layer 3 by external environmental factors such as moisture, salt, and chemicals. This significantly extends the service life of the nickel plating layer 3 in harsh environments and reduces the frequency of maintenance and replacement. The anti-corrosion layer 32 can be made of epoxy resin material with excellent adhesion and chemical resistance, or material that provides good wear resistance and UV resistance. Zinc powder can also be added to the nickel plating layer 3 to provide sacrificial anode protection and prevent electrochemical corrosion from damaging the nickel plating layer 3. The thickness of the anti-corrosion layer 32 is 2μm~3μm, which reduces the cost of anti-corrosion while still meeting the anti-corrosion requirements.

[0032] The working principle of this invention is as follows: The core body 1 is composed of core wires 11 and side wires 12. The side wires 12 are uniformly twisted along the outer peripheral wall of the core wires 11. This structural design not only enhances the overall strength and toughness of the core body 1, but also improves its tensile and torsional resistance. The grooves 121 formed between the side wires 12 significantly increase the contact area between the tin plating layer 2 and the core body 1, making the tin plating layer 2 more firmly attached to the surface of the core body 1 and effectively preventing plating peeling. In addition, a nickel plating layer 3 is added to the outside of the tin plating layer 2. Utilizing the high wear resistance and corrosion resistance of the nickel plating layer 3, the tin plating layer 2 is further protected from external mechanical wear and chemical corrosion, thereby extending the service life of the core body 1. This multi-layer plating structure design not only improves the electrical performance of the core, but also enhances its mechanical stability and environmental adaptability, making it suitable for applications with high reliability requirements.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A wire core with a coating designed to prevent peeling, characterized in that: include: The core body (1) includes a core wire (11) and side wires (12); the core wire (11) has multiple side wires (12) arranged in the circumferential direction, the multiple side wires (12) are evenly spaced, and grooves (121) are formed between different side wires (12); the outer layer of the core body (1) is provided with a tin plating layer (2), the tin plating layer (2) fills the grooves (121); the outer layer of the tin plating layer (2) is provided with a nickel plating layer (3).

2. The wire core with anti-detachment coating according to claim 1, characterized in that: The thickness of the tin plating layer (2) is 3.5μm to 6.2μm, and the thickness of the nickel plating layer (3) is 1.5μm to 3.2μm.

3. The wire core with anti-detachment coating according to claim 1, characterized in that: The side wire (12) is twisted in a clockwise or counterclockwise direction on the outer peripheral wall of the core wire (11), and the groove (121) is spiral.

4. The wire core with anti-detachment coating according to claim 3, characterized in that: The pitch of the groove (121) is 3mm~5mm, and the depth of the groove (121) is 0.2mm~0.5mm.

5. The wire core with anti-detachment coating according to claim 1, characterized in that: The side wire (12) has a plurality of micropores (122) arranged in an array on the side away from the core wire (11), and the tin plating layer (2) fills the micropores (122).

6. The wire core with anti-detachment coating according to claim 5, characterized in that: The depth of the micropore (122) is 20μm~50μm, the micropore (122) is conical, the diameter of the micropore decreases as the depth increases, and the maximum diameter of the micropore (122) is 5μm.

7. A wire core with anti-detachment coating according to claim 5, characterized in that: The inner wall of the micropore (122) and the outer surface of the side wire (12) away from the core wire (11) are provided with a nano-hydrophobic layer, the thickness of which is 2μm~5μm.

8. The wire core with anti-detachment coating according to claim 1, characterized in that: The bonding surface between the tin plating layer (2) and the nickel plating layer (3) is a frosted surface (21).

9. A wire core with anti-detachment coating according to claim 1, characterized in that: The surface of the nickel plating layer (3) is uniformly distributed with hard particles, and the hard particles and the nickel plating layer (3) form a hard layer (31); the thickness of the hard layer (31) is 0.5μm~1.2μm.

10. A wire core with anti-detachment coating according to claim 1, characterized in that: The outer wall of the nickel plating layer (3) is plated with an anti-corrosion layer (32), the thickness of which is 2μm~3μm.

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