CN1536654A - Method for manufacturing thermal superconducting block, sheet and cover body - Google Patents

Abstract

The invention discloses a method for manufacturing a thermal superconducting block, a thermal superconducting sheet and a cover body, which comprises the following steps: selecting a metal pipe or body with a melting point higher than that of molten metal; the metal tube and the metal body are hollow, and at least one side of the metal tube is provided with an opening; placing a single or a plurality of hollow metal pipes or bodies into a powder metallurgy die-casting forming die or a melting die-casting forming die; the hollow metal pipe, body and metal are tightly fixed together by powder metallurgy or die-casting forming technology to form an integral structure; filling a heat conduction superconducting material into the metal tube and the body; pumping out the gas in the metal tube and the body to form vacuum; sealing the openings of the metal tube and the metal body; and finishing the finished product.

Description

Method for manufacturing thermal superconducting block, sheet and cover

technical field

The present invention provides a manufacturing method of a thermal superconducting block, sheet, and cover, especially a method of integrating a thermal conduction superconductor with a metal material, so that a metal tube with low pressure resistance can be used as a heat conduction tube. The outer shell of the superconductor can reduce the manufacturing cost, and the yield rate of the manufacturing process is high.

Background technique

At present, most of the cooling devices used by the industry for computer central processing units (CPU) or high heat source products are made of aluminum heat sinks with high heat transfer efficiency (such as the heat sink manufactured by Taiwan Patent No. 459469). The base is in contact with the heat source to absorb heat and transfer it to the fins of the heat sink, and then use the fan to blow out cold air to remove the heat on the heat sink.

Since the high heat generated by today's high-efficiency CPUs cannot be quickly conducted and eliminated by ordinary traditional aluminum heat sinks, it is another way to use copper metal, which is about twice as efficient as aluminum metal, to conduct heat from the CPU. However, the density of aluminum metal is about 2.7g/cm ³ , while the density of copper metal is 8.93g/cm ³ (the weight of copper metal in the same volume is about three times that of aluminum metal), so if copper metal is used entirely If it is made into a heat sink, it will fail to pass the landing test due to the weight of copper, or the motherboard will be deformed after being installed on the motherboard for a long time. At present, the so-called aluminum heat sink with copper bottom on the market is to embed the pre-formed copper plate on the bottom surface of the base of the aluminum heat sink by forging or welding technology; Taiwan Patent No. 459469 also belongs to the copper plate embedded Solid in the design of the aluminum heat sink.

Although embedding a small-thickness copper plate in an aluminum heat sink has the effect of improving thermal conductivity at a lighter weight, if an object with higher thermal conductivity can be combined with an aluminum heat sink, or It is to directly make the material with high thermal conductivity into the shell of the machine or equipment, which can further improve the heat dissipation performance. No. 91106780, No. 91110345, and No. 91106084 applications previously filed by the inventor of this case are all aimed at solving the shortcomings of the aforementioned traditional heat dissipation structure.

These previous applications all have a common characteristic, that is, using heat conduction superconducting tubes to combine metal blocks or sheets, and covers. However, no matter in what way the thermal conduction superconducting tube is combined with the metal block, sheet, or cover, the thermal conduction superconducting tubes adopted in these previous applications are hollow metal tubes before being combined with the metal block, sheet, or cover. The tube and body are filled with heat conduction superconducting material and sealed. During manufacture, the heat conduction superconductor body and body are put into a mold, and the metal is formed into a metal block combined with the heat conduction superconductor body and body by die casting or powder metallurgy technology. sheet or cover.

Due to the need to withstand high temperature and high pressure during die casting or powder metallurgy, the heat conduction superconductor must be made of metal tubes and bodies that can withstand high temperature and high pressure, and must be considered during the manufacturing process. , the influence caused by the body, whether it will affect the heat conduction performance of the heat conduction superconducting tube and the body, so the yield rate of the product is low, and the manufacturing cost is high. The present invention is to further improve the deficiencies in the manufacturing process of these previous applications.

Contents of the invention

The main purpose of the present invention is to provide a method for manufacturing thermal superconducting blocks, sheets, and covers, which can adopt lower-level low-pressure and low-temperature-resistant hollow metal tubes and body-integrated metal blocks, sheets, The cover body is filled with heat conduction superconducting material in the hollow metal tube and body, and the metal tube and body are closed to reduce the manufacturing cost, and there is no need to consider the heat transfer performance of the heat conduction superconducting tube due to temperature and pressure changes in the manufacturing process The impact can be used to improve the yield of the product.

Based on this, the manufacturing method of the thermal superconducting block, sheet and cover body provided by the present invention must first select a metal tube or body with a melting point higher than the temperature of the molten metal, set the metal tube or body as hollow, and have at least one One side is an opening, and then a single or multiple hollow metal tubes and bodies are placed in a powder metallurgy die-casting mold or a molten die-casting mold, and the hollow metal tubes, bodies and metal are tightly consolidated in the powder metallurgy or die-casting molding technology. Together to form an integrated structure, then fill the metal tube and body with heat conduction superconducting material, then pump out the gas in the metal tube and body to form a vacuum, and seal the opening of the metal tube and body to complete the finished product.

Description of drawings

Fig. 1 is a flowchart showing the production method of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention in which a circular metal tube bent into a  shape is combined with a heat-conducting metal block.

Fig. 3 is a perspective view showing an embodiment of the present invention in which a straight circular metal tube is combined with a heat-conducting metal block.

Fig. 4 is a planar cross-sectional view showing an embodiment of the present invention combining a hollow metal tube with an opening at one end and a body with a metal block.

Fig. 5 is to show that the present invention will combine the hollow metal tube of metal block, the body after filling heat conduction superconducting material

Example plan view.

FIG. 6 is a planar cross-sectional view of an embodiment of the present invention, in which a hollow metal tube combined with a metal block is filled with a thermally conductive superconducting material, and the end of the metal tube is closed to complete the finished product. Among them, the figure number:

(1) heat conduction superconducting conduit, body (11) metal tube, body (111) opening

(12) Heat conduction superconducting materials (2) Metals

Referring to the flow chart of Fig. 1 and shown in Fig. 4, the manufacturing method of thermal superconducting block, sheet, cover provided by the present invention comprises the following steps:

a, select the metal pipe and body 11 with melting point higher than the temperature of molten metal;

b. Set the metal pipe and body 11 as hollow, and at least one side is an opening 111;

c. Place a single or multiple hollow metal tubes and body 11 into a powder metallurgy die-casting mold or a molten die-casting mold;

d. The hollow metal tube, the body 11 and the metal 2 are closely consolidated together by powder metallurgy or die-casting molding technology to form an integrated structure (as shown in Figure 4);

E, filling the heat conduction superconducting material 12 into the metal pipe, the body 11 (as shown in Figure 5);

f. The gas in the metal tube and body 11 is drawn out to form a vacuum;

g, metal pipe, opening 111 of body 11 is sealed (as shown in Figure 6);

h. Complete the finished product.

The completed finished product can be shown in Fig. 2 and Fig. 3 .

The heat-conducting superconducting tube and the body can adopt metal pipes and bodies (such as copper, aluminum or other metal pipes) that are relatively low in compression resistance and temperature resistance but can be freely bent or deformed to reduce costs; the filling The heat conduction superconducting material 12 in the metal tube and body 11 is a material with high-speed heat conduction performance, such as:

1. Inorganic high-temperature superconducting compound materials, such as: yttrium barium copper oxide (YBCO) superconducting material, thallium barium calcium copper oxide (TBCCO) superconducting material, mercury barium calcium copper oxide (HBCCO) superconducting material, bismuth Strontium calcium copper oxide (BSCCO) superconducting material, or other inorganic superconducting materials.

2. Organic superconducting materials, such as: pure water or other organic superconducting materials.

3. Other materials that can achieve high-speed thermal conductivity.

After the heat-conducting superconducting material is filled in the metal tube and body 11, the tube and body are processed and sealed to prevent the said heat-conducting material from leaking out of the tube body; Materials constitute heat conduction superconducting tubes and bodies; the above-mentioned inorganic hypersuperconducting materials are applied on the principle of utilizing the high-speed oscillation and friction generated when the molecules in the tubes and bodies are heated, so that heat energy can be quickly transferred in a fluctuating manner; organic high-temperature superconducting materials Conductive material, the principle of its application is to use the phase change produced by the metal tube and the liquid molecules in the body to conduct heat quickly. The transmission time of the pipe and body from the hot end to the cold end is very short, so the temperature difference between the hot end and the cold end is very small, which can achieve the best heat conduction effect. Experiments have proved that its heat transfer rate is about five times that of copper, and more than ten times faster than that of ordinary aluminum metals.

By the aforementioned method of the present invention, it can first bend the metal pipe and body into a curved shape or other three-dimensional shapes, then put a single or multiple heat-conducting superconducting tubes and bodies into the molding die, and then put the metal powder and high The mixed material of the molecular binder is injected into the molding mold by injection molding technology and combined with the heat conduction superconducting tube to form a green embryo; the green embryo is then subjected to solvent degreasing, thermal degreasing and sintering procedures, and then it can be cooled and formed to complete the finished product . Or use die-casting technology to combine elements formed into metal blocks, sheets or covers with metal tubes and bodies, and then fill the metal tubes and bodies with the heat-conducting superconducting material, and then vacuumize and Close the opening of the metal tube and body to complete the finished product.

The thermal superconducting heat conduction block and sheet made by the aforementioned method of the present invention are mainly used to transfer the heat of the heat source to another heat dissipation element to improve the heat conduction efficiency; One end is in contact with the heat source, while the other end of the thermal superconducting heat-conducting block and sheet is in contact with the heat sink or the chassis to transfer the heat to the components that are easier to dissipate heat and then cooperate with the fan to dissipate heat. It is suitable for the place where the heat source is located. The location is relatively narrow and it is not easy to install heat dissipation elements, or the heat needs to be redistributed and conducted to improve the heat dissipation effect. Therefore, the present invention can also bend the heat conduction superconducting tube into a 3D shape to meet the needs of different environments. And sintered into various shapes of thermal superconducting thermal blocks, sheets or parts.

The parts made by the aforementioned method of the present invention can be directly assembled as a part of the structure of the machine or tool, so that the heat generated during the operation of the machine or tool can be directly absorbed and dissipated by the casing.

Claims (1)

1. A method for manufacturing a thermal superconducting block, sheet, and cover, comprising the following steps: a. Select metal tubes and bodies with higher melting point than molten metal; b. Set the metal tube and body as hollow, and at least one side is an opening; c. Put single or multiple hollow metal tubes and bodies into powder metallurgy die-casting molds or molten die-casting molds; d. The hollow metal tube, body and metal are tightly consolidated together by powder metallurgy or die-casting forming technology to form an integrated structure; e. Filling the heat conduction superconducting material into the metal tube and the body; f. Evacuate the metal tube and the gas in the body to form a vacuum; g. Seal the opening of the metal pipe and body; h. Complete the finished product.

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