Patent ID: 7231715
Filing Date: 2007-06-19
Classification: B21K,F28D,Y10T

Abstract:
1. A method for forming an end surface of a sealed hollow tubular heat pipe that is vacuumed and filled with working fluid with at least one protruding end, comprising steps of: providing a mold module for placing the sealed hollow tubular heat pipe therein, wherein the mold module having a longer length than the heat pipe has, inside of the mold module further comprises a mold chamber, having the same diameter as the outer diameter of the heat pipe has, to receive the sealed hollow tubular heat pipe; providing a pointed extruding shaft, which can inserted into the mold chamber from an open end of the mold module; and compressing the protruding end of the hollow tubular heat pipe via the pointed extruding shaft to render the protruding end of the heat pipe to be depressed inward into inside of the hollow tubular heat pipe, thereby obtaining the hollow tubular heat pipe having a concaved end surface.