Sealing method and structure of heat pipe

Abstract

A method of forming a sealing structure at an open end of a heat pipe includes shrinking the open end to form a shrunk end with a cone-shaped portion, pressing the shrunk end to form a pinched portion so that the shrunk end and regions adjacent to the cone-shaped portion are deformed exceedingly outer than a circumference of the heat pipe, soldering an edge of the shrunk end, and modifying the shrunk end and the regions without any deformation exceeded outer than an original annular size of heat pipe. As such, the sealing structure includes a pinched portion with internal surfaces closely contacted, and at least two edges formed on the pinched portion to be flatly and smoothly extended from an end of the heat pipe.

1 . A method of forming a sealing structure at an open end of a heat pipe, comprising: 
 shrinking the open end to form a shrunk end with a cone-shaped portion;    pressing the shrunk end to form a pinched portion so that the shrunk end and regions adjacent to the cone-shaped portion are deformed exceedingly outer than a circumference of the heat pipe;    soldering an edge of the shrunk end; and    modifying the shrunk end and the regions without any deformation exceeded outer than an original annular size of heat pipe.    
   
   
       2 . The method of  claim 1 , wherein the heat pipe is a cylindrical tube with a circular cross section.  
   
   
       3 . A sealing structure of a heat pipe, the sealing structure comprising: 
 a pinched portion with internal surfaces closely contacted; and    at least two edges formed on the pinched portion to be flatly and smoothly extended from an end of the heat pipe.    
   
   
       4 . The sealing structure of  claim 3 , further comprising a soldering portion formed on the pinched portion.  
   
   
       5 . The sealing structure of  claim 3 , wherein the pinched portion is formed in a line-shaped and the edges are formed on two opposite sides thereof.