Heat sink structure and manufacturing method thereof

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, 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 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 thrust into the connection channels and moved in the axial direction to the second end to press fit and integrally connect the fins with the main body.