阅读说明：本技术 一种终端设备的壳体及其加工方法 (Shell of terminal equipment and processing method thereof ) 是由 杨善强 张新服 于 2018-06-19 设计创作，主要内容包括：本申请提供了一种终端设备的壳体及其加工方法,其中壳体包括：壳体本体,以及喷涂于壳体本体表面的导热层,导热层内包括纳米碳粒子和导热金属颗粒,导热层的表面具有凹凸不平的散热微结构。其中,纳米碳粒子具有优良的热传导和热辐射性能,热传导性能主要体现在热扩散传递,纳米碳粒子的热扩散速度≥200mm<Sup>2</Sup>/S,热辐射系数为0.92-0.95,具有优异的热传导性能；另外,纳米碳粒子在干燥后能够在壳体表面形成连续的导热通道,有利于加强热传导性能,使热量更快的传导出去。导热金属颗粒的粒径较大,纳米碳粒子与导热金属颗粒能够在壳体本体的表面形成凹凸不平的散热微结构,有利于增大热辐射面积,从而进一步提高导热层的散热性能。(The application provides a shell of terminal equipment and a processing method thereof, wherein the shell comprises: the shell body to and the spraying in the heat-conducting layer on shell body surface, including nano carbon particle and heat conduction metal particle in the heat-conducting layer, the surface of heat-conducting layer has unevenness's heat dissipation microstructure. Wherein the nano carbon particles have excellent heat conduction and heat radiation performance, the heat conduction performance is mainly reflected in heat diffusion transfer, and the heat diffusion speed of the nano carbon particles is more than or equal to 200mm 2 (S), the heat radiation coefficient is 0.92-0.95, and the heat conduction performance is excellent; in addition, the nano carbon particles can form a continuous heat conduction channel on the surface of the shell after being dried, so that the heat conduction performance is enhanced, and the heat is conducted out more quickly. The particle size of the heat conduction metal particles is large, and the uneven heat dissipation microstructure can be formed on the surface of the shell body by the nano carbon particles and the heat conduction metal particles, so that the heat radiation area is increased, and the heat dissipation performance of the heat conduction layer is further improved.)

1. A housing for a terminal device, comprising: the shell comprises a shell body and a heat conduction layer sprayed on the surface of the shell body, wherein the heat conduction layer comprises nano carbon particles and heat conduction metal particles, the surface of the heat conduction layer is provided with an uneven heat dissipation microstructure, the height difference between the highest point and the lowest point of the heat dissipation microstructure is 1-6 mu m, and the heat conduction metal particles are 1-3 mu m.

2. A terminal device casing according to claim 1, wherein the thermally conductive metal particles have a thermal conductivity of more than 398W/MK.

3. The casing of the terminal device as claimed in claim 1, wherein the ratio of the parts by mass of the nano carbon particles to the parts by mass of the heat conducting metal particles is 1: (1.3-1.4).

4. The casing of the terminal equipment as claimed in claim 1, wherein the heat conducting layer comprises the following raw materials in parts by mass: 10.4-14 parts of heat-conducting metal particles, 25-30 parts of waterborne polyurethane resin, 0.2-0.5 part of surfactant, 8-10 parts of graphite and 50-70 parts of deionized water.

5. The casing of the terminal device according to claim 1, wherein the heat conductive layer includes a nano carbon layer and a heat conductive metal layer, the heat conductive metal layer is formed on a surface of the casing body, and the nano carbon layer is formed on a surface of the heat conductive metal layer.

6. The housing of a terminal device as set forth in claim 1, wherein the nano-carbon particles have a particle size of 10 to 100 nm.

7. A processing method of a terminal device shell is characterized by comprising the following steps:

providing a shell body;

the shell body is sprayed with a heat conduction layer formed by carbon nanoparticles and heat conduction metal particles, and the surface of the heat conduction layer is provided with an uneven heat dissipation microstructure.

8. The method as claimed in claim 7, wherein the step of spraying the heat conductive layer formed by the nano carbon particles and the heat conductive metal particles on the housing body comprises:

uniformly mixing waterborne polyurethane resin, a surfactant, graphite, heat-conducting metal particles and deionized water according to preset parts by mass to form a heat-conducting coating;

and spraying the heat-conducting coating to the surface of the shell body in an electrostatic spraying mode.

9. The method as claimed in claim 7, wherein the step of spraying the heat conductive layer formed by the nano carbon particles and the heat conductive metal particles on the housing body comprises:

spraying heat-conducting metal particles on the surface of the shell body in an electrostatic spraying mode to form a heat-conducting metal layer;

uniformly mixing waterborne polyurethane resin, a surfactant, graphite and deionized water according to a preset mass part to form a nano carbon coating;

and spraying the nano carbon coating on the surface of the heat-conducting metal layer in an electrostatic spraying manner to form a nano carbon layer.

10. The method for processing the terminal device casing according to claim 7, wherein the temperature of the spraying is 90 ℃ to 130 ℃.

Technical Field

The disclosure relates to the technical field of heat dissipation, in particular to a shell of a terminal device and a processing method thereof.

Background

At present, the development of the intelligent terminal industry is promoted by the appearance of large-scale integrated circuits. Meanwhile, the density of electronic components is continuously increased, effective heat management is difficult due to the fact that the intelligent terminal is light and thin and the packaging technology is compact, and the intelligent terminal can be overheated locally when working for a long time.

At present, common heat dissipation means includes attached heat dissipation membrane, heat conduction silica gel and copper facing etc. and wherein, copper facing's mode can form the one deck fine and close, smooth copper layer on the terminal housing, and this copper layer has good heat conductivility to can closely laminate with the terminal housing, thereby promote intelligent terminal to the ambient radiation heat energy.

However, the heat dissipation method of the evaporation copper layer is mainly based on heat conduction, the longitudinal heat dissipation capability is insufficient, and in addition, the smooth surface of the copper layer also limits the heat conduction area, and the heat dissipation effect is reduced.

Disclosure of Invention

The embodiment of the invention provides a shell of terminal equipment and a processing method thereof, and aims to solve the problem that the heat dissipation effect of the terminal equipment in the prior art is poor.

In a first aspect, the present invention provides a housing of a terminal device, comprising: the shell comprises a shell body and a heat conduction layer sprayed on the surface of the shell body, wherein the heat conduction layer comprises nano carbon particles and heat conduction metal particles, the surface of the heat conduction layer is provided with an uneven heat dissipation microstructure, the height difference between the highest point and the lowest point of the heat dissipation microstructure is 1-6 mu m, and the heat conduction metal particles are 1-3 mu m.

In a second aspect, the present invention further provides a method for processing a terminal device housing, including:

providing a shell body;

the shell body is sprayed with a heat conduction layer formed by carbon nanoparticles and heat conduction metal particles, and the surface of the heat conduction layer is provided with an uneven heat dissipation microstructure.

The beneficial effect of this application is as follows:

the application provides a shell of terminal equipment and a processing method thereof, wherein the shell comprises: the shell body and the spraying in the heat conduction layer on the surface of the shell body, the heat conduction layer comprises nano carbon particles and heat conduction metal particles, and the surface of the heat conduction layer is provided with concave-convex partsA flat heat dissipation microstructure. Wherein the nano carbon particles have excellent heat conduction and heat radiation performance, the heat conduction performance is mainly reflected in heat diffusion transfer, and the heat diffusion speed of the nano carbon particles is more than or equal to 200mm²(S), the heat radiation coefficient is 0.92-0.95, and the heat conduction performance is excellent; in addition, the nano carbon particles can form a continuous heat conduction channel on the surface of the shell after being dried, so that the heat conduction performance is enhanced, and the heat is conducted out more quickly. The particle size of the heat conduction metal particles is large, and the uneven heat dissipation microstructure can be formed on the surface of the shell body by the nano carbon particles and the heat conduction metal particles, so that the heat radiation area is increased, and the heat dissipation performance of the heat conduction layer is further improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a housing of a terminal device provided in the present application;

fig. 2 is a schematic structural diagram of a housing of another terminal device provided in the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The application provides a shell of a terminal device and a processing method thereof, aiming at the problem that the heat dissipation effect of the terminal device in the prior art is poor.

In this application, casing body 1 is metal casing, can be materials such as magnesium alloy, zinc alloy, aluminum alloy to the surface at metal casing can effectively be attached to nano-carbon particle and heat conduction metal particle. The heat-conducting metal particles can be micron-sized copper particles, silver particles and the like, and the heat conductivity coefficient of the heat-conducting metal particles is larger than 398W/MK, so that the heat dissipation effect is ensured. The particle size of heat conduction metal particle is too little, then can't form unevenness's micro-structure, and heat conduction metal particle's particle size is too big, then can lead to heat conduction metal particle discontinuous, and under the heat-conducting layer of the same thickness promptly, the continuity between the heat conduction metal particle that the particle size is big is poor than the continuity between the heat conduction metal particle that the particle size is little, and heat conductivility is poor. In the present application, the particle size of the heat conductive metal particles is preferably 1 to 3 μm to ensure formation of a distinct heat dissipation microstructure having a height difference of 1 to 6 μm between the highest point and the lowest point.

Please refer to fig. 1, which is a schematic structural diagram of a housing of a terminal device provided in the present application. As can be seen from fig. 1, the housing of the terminal device provided in the present embodiment includes: the heat conduction layer 2 comprises a nano carbon layer 21 and a heat conduction metal layer 22, the heat conduction metal layer 22 is formed on the surface of the shell body 1, and the nano carbon layer 21 is formed on the surface of the heat conduction metal layer 22. The nano-carbon layer 21 includes nano-carbon particles 210 therein, and the heat-conducting metal layer 22 includes heat-conducting metal particles 220 therein. The particle size of the heat conducting metal particles 220 is relatively large, and the nano carbon layer 21 and the heat conducting metal layer 22 are both formed on the surface of the housing body 1 in a spraying manner, so that an uneven heat dissipation microstructure can be formed on the surface of the housing body 1, the horizontal line where the highest point of the heat dissipation microstructure is located is H, the horizontal line where the lowest point is located is L, and the height difference between the lines H and L is 1-6 μm. Wherein, the nano carbon particles 210 have excellent heat conduction and heat radiation performance, the heat conduction performance is mainly reflected in heat diffusion transfer, in the embodiment, the heat diffusion speed of the nano carbon particles 210 is more than or equal to 200mm²S, heat radiationThe coefficient is 0.92-0.95, and the heat conduction performance is excellent; in addition, the nano carbon particles 210 can form a continuous heat conduction channel on the surface of the shell after drying, which is beneficial to enhancing the heat conduction performance and enabling heat to be conducted out more quickly. The particle size of the heat conducting metal particles 220 is large, and the uneven heat dissipation microstructure can be formed on the surface of the shell body 1 by the nano carbon particles 210 and the heat conducting metal particles 220, so that the heat radiation area is increased, and the heat dissipation performance of the heat conducting layer 2 is further improved.

Please refer to fig. 2, which is a schematic structural diagram of a housing of another terminal device provided in the present application. As can be seen from fig. 2, the housing of the terminal device provided in the present embodiment includes: the heat conduction layer 2 comprises a shell body 1 and a heat conduction layer 2 sprayed on the surface of the shell body 1, the heat conduction layer 2 comprises a mixture of nano carbon particles 210 and heat conduction metal particles 220, the nano carbon particles 210 with small particle sizes are dispersed among the heat conduction metal particles 220 with large particle sizes, and uneven heat dissipation microstructures can be formed on the surface of the shell body 1. The horizontal line of the highest point of the heat dissipation microstructure is H, the horizontal line of the lowest point of the heat dissipation microstructure is L, and the height difference between the lines H and L is 1-6 μm.

In this application, the raw materials of heat-conducting layer include according to the part by mass: 25-30 parts of waterborne polyurethane resin, 0.2-0.5 part of surfactant, 8-10 parts of graphite and 50-70 parts of deionized water. In addition, the mass part ratio of the nano carbon particles to the heat conducting metal particles is 1: (1.3-1.4). Wherein, graphite is a raw material for forming the nano carbon particles, the water-based polyurethane resin is a main material of the coating, the spraying adhesion force can be increased, the nano carbon particles are dispersed, and the surfactant can be additives with leveling and defoaming effects, such as polyether modified polydimethylsiloxane and the like.

In addition, the application also provides a processing method of the terminal equipment shell, which comprises the following steps:

step S100: a housing body is provided.

Step S200: and spraying a heat conduction layer formed by the nano carbon particles and the heat conduction metal particles on the shell body, wherein the surface of the heat conduction layer is provided with an uneven heat dissipation microstructure.

Specific forming manners of the heat conductive layer may include two manners, wherein the first manner includes the following steps:

step S211: uniformly mixing the waterborne polyurethane resin, the surfactant, the graphite, the heat-conducting metal particles and the deionized water according to the preset mass part to form the heat-conducting coating.

Step S212: and spraying the heat-conducting coating to the surface of the shell body in an electrostatic spraying mode.

The steps of the second mode are as follows:

step S221: and thermally conducting metal particles are sprayed on the surface of the shell body in an electrostatic spraying mode.

Step S222: uniformly mixing the waterborne polyurethane resin, the surfactant, the graphite and the deionized water according to the preset mass part to form the nano-carbon coating.

Step S223: and spraying the nano carbon coating on the surface of the heat-conducting metal particles in an electrostatic spraying manner.

The first method for forming the heat conducting layer is to pre-mix the raw materials such as the waterborne polyurethane resin, the surfactant, the graphite and the heat conducting metal particles, and the heat conducting metal particles can precipitate in the nano carbon slurry formed by the waterborne polyurethane resin, the surfactant, the graphite and the like, so that the heat conducting coating needs to be stirred simultaneously during spraying to avoid the heat conducting metal particles from depositing at the bottom and influencing the uniformity of the heat conducting coating. The appearance of the heat-conducting layer formed by the first method is different from that of the heat-conducting layer formed by the second method, the appearance of the heat-conducting layer formed by the first method is the appearance of mixing bronze speckles in black, and the appearance of the heat-conducting layer formed by the second method is black.

In addition, the temperature of spraying in this application is 90 ℃ to 130 ℃. The spraying temperature is too high, so that the shell is easy to deform at high temperature, and the spraying temperature is too low, so that the adhesive force of the coating is easy to reduce. After the spraying is finished, the coating is usually dried for 5-30min at 80-120 ℃ to further improve the bonding force between the coating and the shell. The present solution is further described below with reference to specific embodiments.