TW201317536A - Method for spraying surface of heat sink - Google Patents

Abstract

A method for spraying a surface of a heat sink is disclosed. First, the heat sink, right amount of ceramic powder, and a solvent are provided. Afterward, the ceramic powder is mixed with the solvent forming ropy liquidity. Afterward, the surface of the heat sink is cleaned. Afterward, the mixed ropy liquidity is sprayed on the surface of the heat sink. Finally, the surface of the heat sink is dried to form a ceramic coating layer thereon, thus providing an antioxidant function.

Description

Radiator surface spraying method

The invention relates to a surface treatment of a metal, in particular to a method for spraying a surface of a heat sink.

According to the conventional heat sink, after the molding, a surface treatment is usually performed to form a film on the surface to achieve an anti-oxidation effect. Conventionally, in order to achieve the purpose of anti-oxidation, a metal heat-dissipating material such as aluminum having an easily oxidizing property, such as aluminum, is used to control the formation of an oxide layer by electrochemical means to prevent further oxidation of materials such as aluminum. Can increase the mechanical properties of the surface.

However, in the past, such as anodizing, the oxidation resistance has been improved to some extent compared with the conventional heat treatment without any treatment, but it is still unable to overcome serious oxidation problems when used for a long time in a high humidity environment. Therefore, the effect of oxidation resistance is not good.

In view of the above, the present inventors have made an effort to improve and solve the above-mentioned shortcomings, and have devoted themselves to research and cooperate with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

The main object of the present invention is to provide a method for spraying a surface of a heat sink by mixing ceramic powder into a solvent and then forming a ceramic coating on the surface of the heat sink by spraying to achieve oxidation resistance.

Another object of the present invention is to provide a method for spraying a surface of a heat sink, since the formed ceramic coating can provide good oxidation resistance and corrosion resistance, and is attached to the surface of the heat sink in a powder form. Therefore, the surface has a concave and convex texture to effectively enhance and increase the heat dissipation capability of the heat sink and its effect.

In order to achieve the above object, the present invention provides a method for spraying a surface of a heat sink, the steps of which include:

a) providing a heat sink, and an appropriate amount of ceramic powder and a solvent, the ceramic powder being mixed into the solvent to form a viscous liquid;

b) cleaning the surface of the heat sink;

c) spraying a solvent mixed with the ceramic powder on the surface of the heat sink;

d) drying the surface of the heat sink to form a ceramic coating.

The detailed description of the present invention and the accompanying drawings are to be understood by the accompanying claims .

Please refer to the first figure, which is a schematic flow chart of the main manufacturing process of the present invention. The invention provides a method for spraying a surface of a heat sink, which mainly performs a surface cleaning operation (such as step S1) by a heat sink formed by a process such as extrusion or drawing of aluminum, and then spraying a solvent mixed with ceramic powder. At the surface of the heat sink (step S2), the surface of the heat sink is finally dried to form a ceramic coating on the surface thereof (step S3) to complete the surface coating method of the heat sink of the present invention.

In more detail, please refer to step S0 of the second figure, and cooperate with the third figure: First, provide a heat sink 1 for surface coating, which is generally made of a metal material having good thermal conductivity such as aluminum. It can be formed by a process such as aluminum extrusion or drawing as described above; the shape, size or appearance of the heat sink 1 is the same as that of the conventional ones, and the embodiment of the present invention is not limit. In addition, an appropriate amount of ceramic powder and a solvent may be prepared as a spray coating, which is mixed into a solvent in a dry state to be a viscous liquid, and the solvent may be an oil or other liquid oil. .

Referring to step S1 of the second figure, the surface of the heat sink 1 is cleaned, and the cleaning operation can be performed by using ultrasonic waves; the heat sink 1 is placed in clear water and the water is vibrated by ultrasonic waves. In order to generate fine vacuum bubbles in the clean water, when the vacuum bubbles are blasted, the energy stored in the bubbles will be released, and the impurities such as dirt contaminated on the surface of the radiator 1 can be taken away, thereby achieving the purpose of cleaning the surface. In addition, in order to make the surface of the heat sink 1 more clean, after the above step S1 is completed, the step S1a may be further performed: the surface of the heat sink 1 is wiped with white electric oil. Therefore, the surface of the heat sink 1 has a cleanliness suitable for adhesion after solvent spraying.

After that, as shown in step S2 and the fourth figure of the second figure, a solvent mixed with ceramic powder is sprayed on the surface of the heat sink 1, and the spraying can be divided into manual spraying and automatic spraying, wherein manual spraying is performed. It means that the inner or inner edge of the surface of each fin 10 such as the heat sink 1 is manually sprayed, and the automatic spraying is performed by the outer surface of the heat sink 1 by a machine such as a robot arm. The solvent mixed with the ceramic powder is uniformly sprayed on the surface of the heat sink 1. In addition, in order to facilitate a large number of operations, a plurality of heat sinks 1 can be attached to a stencil (not shown), and at the same time, the plurality of heat sinks 1 on the stencil are subjected to the aforementioned spraying operation.

Finally, as in step S3 of the second figure, the surface of the heat sink 1 is dried to adhere the ceramic powder mixed with the solvent to the surface of the heat sink to form a ceramic coating 11, and the spraying is completed as in the fifth. The finished product shown in the figure.

Therefore, the surface spraying method of the heat sink of the present invention can be obtained by the above-mentioned step flow.

Therefore, by the surface spraying method of the heat sink of the present invention, since the formed ceramic coating layer 11 can provide good oxidation resistance and corrosion resistance, and is attached to the surface of the heat sink 1 in a powder form, The surface of the heat sink 1 has a concave and convex texture, and can effectively enhance and increase the heat dissipation capability of the heat sink 1 and its effect.

In summary, the present invention can achieve the intended use purpose, and solve the lack of the conventional, and because of the novelty and progress, fully meet the requirements of the invention patent application, and apply according to the patent law, please check and The patent in this case is granted to protect the rights of the inventor.

However, the above description is only a preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, and the equivalent techniques and means, etc., which are used in the description of the present invention and the contents of the drawings, are the same. It is included in the scope of the present invention and is combined with Chen Ming.

<present invention>

1. . . heat sink

10. . . Fin

11. . . Ceramic coating

S0, S1, S1a, S2, S3. . . step

The first figure is a schematic flow chart of the main manufacturing process of the present invention.

The second drawing is a schematic flow chart of a further manufacturing process of the present invention.

The third figure is a schematic view of the appearance of the heat sink to be sprayed by the present invention.

The fourth figure is a schematic diagram of the steps of spraying according to the heat sink of the third figure.

The fifth figure is a schematic view of the appearance of the sprayed finished heat sink of the present invention.

S1, S2, S3. . . step

Claims (10)

A method for spraying a surface of a radiator, the steps of which include:
a) providing a heat sink, and an appropriate amount of ceramic powder and a solvent, the ceramic powder being mixed into the solvent to form a viscous liquid;
b) cleaning the surface of the heat sink;
c) spraying a solvent mixed with the ceramic powder on the surface of the heat sink;
d) drying the surface of the heat sink to form a ceramic coating. The method of spraying a surface of a heat sink according to claim 1, wherein the heat sink of step a) is made of aluminum. The method of spraying a surface of a heat sink according to claim 1, wherein the ceramic powder of the step a) is mixed into the solvent in a dry state. The method for spraying a surface of a heat sink according to claim 1 or 3, wherein the solvent of the step a) is an engine oil. The method for spraying a surface of a heat sink according to claim 1, wherein the cleaning according to step b) is performed by ultrasonic waves in water. The method for spraying a surface of a heat sink according to claim 1, wherein the step b) is followed by wiping the surface of the heat sink with white electric oil. The method for spraying a surface of a heat sink according to claim 1, wherein in the step c), a plurality of the heat sinks are attached to a screen to simultaneously spray. The method for spraying a surface of a radiator according to claim 1, wherein the spraying of the step c) is first manually sprayed, and then automatically sprayed by the machine. The method of spraying a surface of a heat sink according to claim 8, wherein the manual spraying is performed on an inner or inner edge between the fin surfaces of the heat sink. The method of spraying a surface of a heat sink according to claim 8 or 9, wherein the automatic spraying is performed by spraying a large area on the periphery of the heat sink.