Method for manufacturing flat heat pipe
A technology of a flat heat pipe and a manufacturing method, which is applied in the field of heat pipe manufacturing, and can solve problems such as low yield rate, inability to ensure the continuity of the airtight internal capillary structure, unstable performance of the flat heat pipe, etc., and achieve good sealing effect
Inactive Publication Date: 2009-12-30
FU ZHUN PRECISION IND SHENZHEN +1
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Problems solved by technology
However, the manufacturing process of this type of flat heat pipe is cumbersome, and the airtightness and the continuity of the internal capillary structure cannot be guaranteed when welding the upper and lower cover plates.
Therefore, the performance of the flat heat pipe manufactured by this method is unstable and the yield is not high.
Method used
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[0022] Such as image 3 and Figure 4 Shown is the flat heat pipe 30 of the first embodiment of the present invention, which is made by powder injection molding technology. The specific steps are as follows: (1) Provide a mold 10 with a cavity, and the cavity inside the mold 10 The shape is equivalent to the overall size of the flat heat pipe; (2) provide a two-color molding injection machine (not shown in the figure), this two-color molding injection machine has injection systems in two independent directions; (3) provide a particle size of 10 ~20 μm ultrafine metal powder (not shown) and another kind of particle size is 50~150 μm coarse metal powder (not shown); (4) provide a square disappearance filling body 20, and the disappearance The filling body 20 is placed in the cavity of the mold 10; (5) the ultrafine metal powder and the coarse metal powder are injected into the cavity of the mold through injection systems in different directions in order to form a green embryo c...
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Abstract
The invention discloses a method for manufacturing a flat heat pipe, which comprises the following steps: (1) providing a die with a cavity, wherein the shape of the cavity in the die corresponds to the overall dimensions of the flat heat pipe; (2) providing a bicolor injection molding machine which has two injection systems of respective directions; (3) providing two metal powder with different grain diameters; (4) providing a deorienting filling body, and placing the filling body in the cavity of the die; (5) feeding the two metal powder into the cavity of the die in turn through the injection systems of different directions to form a green blank containing the deorienting filling body; (6) removing the deorienting filling body from the inside of the green blank by a chemical degreasing or pyrolysis degreasing process to form a brown blank with an inside cavity; and (7) placing the brown blank into a sintering furnace to perform sintering process and posttreatment process respectively to form the flat heat pipe. The flat heat pipe is integrally molded and has excellent continuity and tightness.
Description
technical field [0001] The invention relates to a method for manufacturing a heat pipe, in particular to a method for manufacturing a flat heat pipe. Background technique [0002] At present, heat pipes are commonly used in the industry to solve the high-density heat dissipation problem of high-speed computers, such as heat pipes, loop heat pipes, and flat heat pipes (Vapor Chamber) and other products. [0003] The working principle of the flat heat pipe is the same as that of the traditional heat pipe. Because it has a larger heat conduction area than the traditional heat pipe, and meets the high practical value of "light, thin, short, and small", it is widely used in electronic products with large heat dissipation surfaces. superior. [0004] Such as figure 1 As shown, a general flat heat pipe has an upper cover 100 prepared by a stamping process, a lower cover 101 matched with the upper cover 100 , and a capillary structure 102 between the upper and lower covers 100 , 1...
Claims
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IPC IPC(8): F28D15/02
Inventor 侯春树
Owner FU ZHUN PRECISION IND SHENZHEN