Heat sink and manufacturing method thereof

Abstract

In a heat sink and the manufacturing method thereof, the heat sink includes heat dissipation fins and heat pipes, and the heat dissipation fins have through holes for the heat pipes to pass through. The heat dissipating fins also have a notch formed at the peripheral of the through hole and communicating with the through hole, and openings formed at two sides of the notch, respectively. According to the manufacturing method, after the heat pipe is assembled with the heat dissipating fin, press strips pass through the openings and are pressed inwardly to reduce the notch to make the notch and the heat pipe plastically deformed. Finally the press strips are removed.

1 . A method of manufacturing a heat sink having a heat dissipation fin, the heat dissipation fin having a through hole for a heat pipe to pass through, a notch formed at the peripheral of the through hole and communicating with the through hole, and openings located at two sides of the notch, respectively, the method comprising:
 making the heat pipe pass through the through hole;   making press strips pass through the openings, respectively;   pressing the press strips to reduce the notch to make the heat dissipation fin plastically deformed; and   removing the press strips.   
   
   
       2 . The method of manufacturing the heat sink according to  claim 1 , wherein the step of pressing the press strips to reduce the notch to make the notch and the heat pipe plastically deformed comprises making the notch tightly-fitted with the peripheral of the heat pipe. 
   
   
       3 . A heat sink, comprising:
 a heat pipe; and   a plurality of heat dissipation fins, each of which has a through hole for the heat pipe to pass through, a notch formed at the peripheral of the through hole and communicating with the through hole, and openings located at two sides of the notch, respectively, the notch being reduced to make the heat dissipation fin plastically deformed, wherein press strips pass through the openings, respectively, and the press strips are pressed to reduce the notch to make the heat dissipation fin plastically deformed.   
   
   
       4 . The heat sink according to  claim 3 , wherein a ring is projected from the peripheral of the through hole to press the heat pipe. 
   
   
       5 . The heat sink according to  claim 3 , wherein the openings are in the shapes of reverse triangles. 
   
   
       6 . The heat sink according to  claim 3 , wherein the press strips are triangular posts. 
   
   
       7 . The heat sink according to  claim 3 , wherein the shapes of the cross sections of the press strips are substantially the same to those of the openings.