Patent ID: 7954237
Filing Date: 2011-06-07
Classification: B22F,B23P,F28D,Y10T

Abstract:
1. A method for manufacturing a heat pipe, comprising: providing a hollow pipe having an open end and a closed end; placing a mold into the hollow pipe through the open end, wherein the mold has a central rod and a shaping component mating with the central rod, and the shaping component has an outward shaping surface, the shaping component comprising a plurality of shaping rods, respectively disposed on a periphery of the central rod; filling a powder into a space between the hollow pipe and the mold through the open end; sintering the powder to form a capillary structure on an inner wall of the hollow pipe, wherein the capillary structure has a profile corresponding to the shaping surface; drawing out the central rod from the hollow pipe along an axial direction of the hollow pipe, wherein the central rod moves relative to the shaping rods; and making the shaping rods away from the capillary structure along a radial direction of the hollow pipe respectively, and drawing out the shaping rods from the hollow pipe along the axial direction of the hollow pipe; pouring a working fluid into the hollow pipe, and drawing out an air inside the hollow pipe before or after pouring the working fluid; and sealing the open end of the hollow pipe.