Method for manufacturing flat plate type heat pipe

Abstract

The invention provides a method for manufacturing a flat plate type heat pipe. The method comprises the following steps of: providing a mould comprising a first mould cavity and a plurality of second mould cavities communicated with the first mould cavity; providing a bi-color moulding injection machine provided with injection systems with two independent directions; providing first metallic powder and second metallic powder; providing a plurality of disappearing filling bodies and placing the disappearing filling bodies in the first mould cavity of the mould; injecting the first metallic powder and the second metallic powder in the first mould cavity and the second mould cavities of the mould from the injection systems in different directions so as to make the second metallic powder completely fill the holes of the disappearing filling bodies and surround the disappearing filling bodies, and make the first metallic powder fill the first mould cavity and the second mould cavities to form a raw blank; removing the filling bodies from the inside of the raw blank to form a brown blank the inside of which is provided with a plurality of accommodating cavities; and placing the brown blank in a sintering furnace, and performing the sintering process and the post-treatment process of the brown blank to obtain the flat plate type heat pipe, wherein the metallic powder is bonded to form a continuous outer cavity of the heat pipe and a plurality of radiator fins extended from the side of the outer cavity.

Description

technical field [0001] The invention relates to a manufacturing method of a heat pipe, in particular to a manufacturing method of a flat heat pipe. Background technique [0002] At present, heat pipes are widely used in the industry to solve the problem of high-density heat dissipation of high-speed computers, such as heat pipes, loop heat pipes, and Vapor Chambers. [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] A general flat-plate heat pipe has an upper cover plate prepared by a stamping process, a lower cover plate matched with the upper cover plate, and a capillary structure between the upper and lower cover plates. The upper and lower cover plates are connected into one bod...

AI Technical Summary

Problems solved by technology

However, the thermal resistance between the heat sink and the upper cover of the flat heat pipe is relatively large, so the heat dissipation performance of the flat heat pipe is not good.

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