Heat sink and manufacturing method thereof

Abstract

A heat sink includes a plurality of heat dissipation fins. Each of the heat dissipation fins includes a sheet body, at least one bent part, and at least one first combined part. The bent part is formed from a terminal end of the sheet body. The first combined part protrudes from the bent part along a direction opposite to the bent direction of the bent part. A manufacturing method of the heat sink is also disclosed.

1 . A heat sink, comprising:
 a plurality of heat dissipation fins, each of the heat dissipation fins comprising:
 a sheet body; 
 at least one bent part, formed from a terminal end of the sheet body; and 
 at least one first combined part, protruding from the bent part along a direction opposite to the bent direction of the bent part. 
   
   
   
       2 . The heat sink as claimed in  claim 1 , wherein the first combined part is formed via a gap on the sheet body. 
   
   
       3 . The heat sink as claimed in  claim 1 , wherein a second combined part is hollowly disposed on the bent part as an indentation, and the second combined part is disposed corresponding to the first combined part. 
   
   
       4 . The heat sink as claimed in  claim 3 , wherein the first combined part of the heat dissipation fin is fixed to the second combined part of another heat dissipation fin via welding, gluing, or adhering. 
   
   
       5 . The heat sink as claimed in  claim 3 , wherein the first combined part comprises a first side and the second combined part comprises a second side; when the heat dissipation fin is connected to another dissipation fin, an interval between two heat dissipation fins is determined by the distance between the first side and the second side. 
   
   
       6 . The heat sink as claimed in  claim 1 , wherein each of the heat dissipation fins comprises two bent parts and two first combined parts, respectively protrude from the two bent parts. 
   
   
       7 . The heat sink as claimed in  claim 1 , wherein a material of the heat sink comprises copper, aluminum, iron, magnesium or alloys thereof. 
   
   
       8 . A manufacturing method of a heat sink, wherein the method comprises steps of:
 transporting a board to a machine tool;   punching the board to form a plurality of sheet bodies, and a bent part is formed on a terminal end of each of the sheet bodies, wherein a first combined part protrudes from the bent part, and a second combined part is hollowly disposed on the edge of the bent part as an indentation corresponding to the first combined part;   bending the bent part to stand correspondingly to each of the sheet bodies; and   cutting each sheet bodies to form a plurality of heat dissipation fins;   wherein when the heat dissipation fins overlap with each other, the first combined part of one heat dissipation fin is connected adjacently to the second combined part of another dissipation fin, and an interval between each two heat dissipation fins is determined by a distance between a first side of the first combined part and a second side of the second combined part.   
   
   
       9 . The manufacturing method as claimed in  claim 8 , wherein the machine tool is a punching machine, or a material of the heat sink comprises copper, aluminum, iron, magnesium or alloys thereof. 
   
   
       10 . The manufacturing method as claimed in  claim 8 , further comprising forming a plurality of breaches when punching the board, and a suitable distance between the breaches is determined. 
   
   
       11 . The manufacturing method as claimed in  claim 10 , wherein the breaches are V-shaped, semi-elliptic shaped, concave-shaped, U-shaped, semicircle-shaped or trapezoid. 
   
   
       12 . The manufacturing method as claimed in  claim 10 , further comprising bending the bent part along troughs of any two breaches disposed horizontally and correspondingly to form a bent line, or bending the bent part along throughs of any two breaches disposed vertically and correspondingly to form a cutting line. 
   
   
       13 . The manufacturing method as claimed in  claim 8 , wherein when the two heat dissipation fins are combined, the first combined part of one heat dissipation fin is combined with the second combined part of another heat dissipation fin via laser spot welding, gluinge, or adhering. 
   
   
       14 . The manufacturing method as claimed in  claim 8 , wherein the interval between the two heat dissipation fins are a distance between the first side and the second side, and the tolerance is 0.1 millimeter. 
   
   
       15 . A manufacturing method of a heat sink, wherein the method comprises steps of:
 transporting a board to a machine tool;   punching the board to form a plurality of sheet bodies, and a bent part is formed on a terminal end of each of the sheet bodies, wherein a first combined part protrudes from the bent part;   bending the bent part to stand correspondingly to each of the sheet bodies; and   cutting each sheet bodies to form a plurality of heat dissipation fins;   wherein when the heat dissipation fins overlap with each other, the first combined part of one heat dissipation fin is adjacently stacked up with the bent part of another heat dissipation fin, and an interval between each two heat dissipation fins is determined by a distance between a third side on the overlap with of heat dissipation fins and a first side of the first combined part.   
   
   
       16 . The manufacturing method as claimed in  claim 15 , wherein the machine tool is a punching machine, or a material of the heat sink comprises copper, aluminum, iron, magnesium or alloys thereof. 
   
   
       17 . The manufacturing method as claimed in  claim 15 , further comprising forming a plurality of breaches when punching the board, and a suitable distance between the breaches is determined. 
   
   
       18 . The manufacturing method as claimed in  claim 17 , wherein the breaches are V-shaped, semi-elliptic-shaped, concave-shaped, U-shaped, semicircle-shaped or trapezoid. 
   
   
       19 . The manufacturing method as claimed in  claim 17 , further comprising bending the bent part along troughs of any two breaches disposed horizontally and correspondingly to form a bent line. 
   
   
       20 . The manufacturing method as claimed in  claim 17 , further comprising bending the bent part along troughs of any two breaches disposed vertically and correspondingly to form a cutting line.