Heat sink structure and manufacturing method thereof

Abstract

A heat sink structure and a manufacturing method thereof. The heat sink includes a main body and multiple radiating fins each having a folded root section. The main body has multiple connection channels formed on a circumference of the main body. The multiple radiating fins are placed in a mold. A mechanical processing measure is used to high-speed impact the main body so as to thrust the main body into the mold. Accordingly, the folded root sections of the radiating fins are relatively high-speed thrust into the connection channels of the main body to tightly integrally connect with the main body.

What is claimed is: 
     
         1 . A heat sink structure comprising:
 a main body having a first end and a second end, the first and second ends defining an axial direction, multiple connection channels being formed on a circumference of the main body; and   multiple radiating fins connected to the circumference of the main body, each first radiating fin having an end formed with at least one folded root section corresponding to the connection channel, the folded root section having a certain form, a mechanical processing measure being used to high-speed impact the main body toward the radiating fins, wherein the folded root sections of the radiating fins are high-speed thrust into the connection channels from the first end to the second end of the main body in the axial direction to tightly integrally connect with the main body.   
     
     
         2 . The heat sink structure as claimed in  claim 1 , wherein the end of the radiating fin is folded back onto itself, bent or waved to form the folded root section. 
     
     
         3 . The heat sink structure as claimed in  claim 1 , wherein the end of the radiating fin is directly folded back onto itself to form the folded root section. 
     
     
         4 . The heat sink structure as claimed in  claim 1 , wherein the folded root section is L-shaped, triangular, reverse T-shaped, curled or water drop-shaped. 
     
     
         5 . The heat sink structure as claimed in  claim 1 , wherein the folded root section of the radiating fin has a thickness slightly larger than a width of the connection channel. 
     
     
         6 . The heat sink structure as claimed in  claim 1 , wherein each connection channel is formed with a planar surface or a raised/recessed non-planar surface. 
     
     
         7 . The heat sink structure as claimed in  claim 1 , wherein the connection channels are radially distributed over the circumference of the main body and the connection channels are normal to the surface of the main body or inclined to the surface of the main body by a certain angle. 
     
     
         8 . The heat sink structure as claimed in  claim 1 , wherein the radiating fin is straight without bending or is formed with at least one bending angle. 
     
     
         9 . The heat sink structure as claimed in  claim 1 , wherein the main body is formed with multiple thrust spaces in communication with the connection channels. 
     
     
         10 . A manufacturing method of a heat sink, comprising steps of:
 providing a mold, the mold having an inner circumference, an upper surface and multiple splits, the inner circumference defining an internal space, the multiple splits being radially formed around the internal space in communication with the internal space and downward extending from the upper surface;   providing multiple radiating fins, the radiating fins being placed in the splits, one radiating fin being placed in each split, an end of each radiating fin being preformed with a folded root section with a certain shape, the folded root sections protruding from the inner circumference of the mold;   providing a main body, the main body having a first end and a second end, the first and second ends of the main body defining an axial direction, multiple connection channels being preformed on a circumference of the main body between the first and second ends, the first end of the main body being aimed at the internal space; and   using a mechanical processing measure to high-speed impact the main body so as to thrust the main body into the internal space and move the main body relative to the multiple radiating fins, whereby the folded root sections of the radiating fins are high-speed thrust into the connection channels and moved in the axial direction to the second end to quickly tightly integrally connect with the main body.   
     
     
         11 . The manufacturing method of the heat sink as claimed in  claim 10 , wherein the main body is temporarily positioned above the mold and the mechanical processing measure is an air compression apparatus for creating compressed air to thrust the main body into the internal space. 
     
     
         12 . The manufacturing method of the heat sink as claimed in  claim 11 , wherein a central body is disposed in the internal space in alignment with the main body.