TWI555463B - Heat sink and manufacturing method thereof - Google Patents

Description

Radiator and method of manufacturing same

The present invention relates to a heat sink, and more particularly to a heat sink for dissipating heat from an electronic component and a method of manufacturing the same.

With the rapid development of the electronic information industry, the heat generated by the heat-generating electronic components such as micro-processing wafers is increasing. In order to dissipate the heat to ensure the normal operation of the electronic components, the industry usually uses a heat-dissipating component on the electronic components. The device dissipates heat from the heat-generating electronic component.

A conventional heat sink generally includes a substrate and a plurality of heat dissipation fins disposed on the substrate. Each of the heat dissipation fins includes a body and a flange that is bent in the same direction from both sides of the body. The heat dissipating fins are sequentially arranged along the longitudinal direction of the substrate, and the ends of the folded edges of each of the heat dissipating fins are in contact with the body of the adjacent heat dissipating fins, and a joint surface is respectively formed at the top end and the bottom end of the heat sink. The substrate is in contact with the heat-generating electronic component, and the heat-dissipating fin is soldered to the substrate by soldering. In the soldering process, solder and flux are added, especially in the welding process of different materials, such as aluminum and copper. Nickel plating or other special treatments are also required, which are complicated and costly.

In view of this, it is necessary to provide a heat sink having a low cost and easy assembly and a method of manufacturing the same.

A heat sink includes a base and a heat sink fin set on the base The base is provided with two spaced-apart fixing portions, each fixing portion includes a boss extending upward from the base and a direction from the side of the boss to the other boss toward the other boss An abutting portion, the abutting portion and the boss and the base form a groove, the abutting portion is provided with a groove, and the opposite sides of the heat dissipating fin group are respectively disposed There is a protruding portion, the heat dissipating fin set is mounted on the base by receiving the protruding portion in a recess of the base and pressing a groove position of the abutting portion.

A method of manufacturing a heat sink, comprising the steps of: providing a pedestal having two spaced apart fixing portions, each fixing portion including a boss extending upward from the pedestal and the boss An abutting portion extending toward a direction of the other of the bosses, and abutting portion between the abutting portion and the boss and the base, the abutting portion is disposed a groove is provided; a heat dissipation fin group is provided, and a protrusion is disposed on each of opposite sides of the heat dissipation fin group; the protrusion is received in the groove of the base and pressed by a fixture The heat dissipating fins are assembled to the base by the groove position of the portion.

Compared with the prior art, the heat dissipation fin set of the heat sink is mounted on the base by receiving the protruding portion in the groove of the base and pressing the groove position of the abutting portion. It is easy to manufacture and allows for a tight and stable bond without the need for soldering between the two, resulting in cost savings and environmental friendliness.

10‧‧‧ radiator

12‧‧‧ Pedestal

16‧‧‧Fixing fin set

20‧‧‧ fixture

21‧‧‧Substrate

22‧‧‧ Punch

120‧‧‧lower surface

121‧‧‧Fixed Department

122‧‧‧ upper surface

123‧‧‧Boss

125‧‧‧Abutment

126‧‧‧ Groove

128‧‧‧ trench

160‧‧‧Heat fins

161‧‧‧ Body Department

162‧‧‧ first fold

163‧‧‧second hem

164‧‧‧ third hem

165‧‧‧ fourth fold

166‧‧‧ middle part

167‧‧‧Extension

168‧‧‧ buckle structure

169‧‧‧Protruding

170‧‧‧ bearing surface

172‧‧‧Support surface

221‧‧‧ knife mouth

1 is an assembled, isometric view of a heat sink in accordance with a preferred embodiment of the present invention.

Figure 2 is an exploded view of the heat sink of Figure 1.

3 is a perspective view of a heat sink fin in the heat sink shown in FIG. 2.

4 is a side view showing the heat sink shown in FIG. 1 stamped by a jig.

The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

As shown in FIG. 1 , the heat sink 10 includes a base 12 and a heat dissipation fin set 16 disposed on the base 12 .

2, the base 12 is generally rectangular in shape and includes a flat lower surface 120 and an upper surface 122 opposite the lower surface 120. The lower surface 120 is for conforming to a heat generating electronic component. A fixing portion 121 is disposed on each of opposite sides of the upper surface 122. The two fixing portions 121 are spaced apart from each other in parallel, which may be formed by extrusion or other means. Each of the fixing portions 121 includes a boss 123 extending upward from the upper surface 122 of the base 12 and extending from a side of the boss 123 toward a side of the other boss 123 toward the other boss 123. An abutting portion 125 defines a recess 126 between the abutting portion 125 and the boss 123 and the upper surface 122 of the base 12. Each of the bosses 123 is formed vertically extending upward from the upper surface 122 of the base 12 and has a rectangular cross section. Each of the abutting portions 125 extends horizontally from one side of the boss 123 to the other of the bosses 123, and a groove 128 is formed on the upper surface thereof. The groove 128 extends in the longitudinal direction of the abutting portion 125 and penetrates the front and rear sides of the base 12 opposite to each other.

The heat dissipation fin group 16 is formed by arranging a plurality of parallel heat dissipation fins 160. Referring to FIG. 3 , each of the heat dissipation fins 160 includes a body portion 161 , a first flange 162 extending from the outer edge of the body portion 161 , a second flange 163 , and two third portions Folding edge 164 and two fourth folding edges 165. The body portion 161 is generally an inverted "T"-shaped structure including a rectangular plate-shaped intermediate portion 166 and two extending portions 167 extending outwardly from opposite sides of the intermediate portion 166 near the bottom end thereof. The two extensions 167 are also rectangular and have a plane lying in the same plane as the plane of the body portion 161. The first flange 162 is formed by vertically bending the top end of the intermediate portion 166. The second flange 163 is opposite to the first flange 162 and is formed by vertically bending the bottom portion of the intermediate portion 166 and the two extending portions 167. The two third flanges 164 are respectively formed by vertically bending the top ends of the two extension portions 167. The two fourth flanges 165 are respectively connected between the third flange 164 and the second flange 163, and are respectively bent and extended by a side of the two extension portions 167 away from the intermediate portion 166. to make. The first flange 162 and the second flange 163 of each of the heat dissipation fins 160 are respectively provided with a buckle structure 168 that is matched with the first flange 162 and the second flange 163 of the adjacent heat dissipation fins 160. The heat dissipating fins 16 are assembled by being fastened to each other by the fastening structures 168. The extended portions 167 of the assembled heat dissipating fins 160 respectively form a protrusion on opposite sides of the bottom end of the heat dissipating fin group 16 . 169. The first flange 162, the second flange 163, the third and fourth flanges 164, 165 of each of the heat dissipation fins 160 have the same width extending outward from the body portion 161, and the heat dissipation fins are assembled together. The first folded edge 162, the second folded edge 163, and the third and fourth folded edges 164 and 165 of the rear heat dissipating fins 160 respectively abut against the body portion 161 of the front heat dissipation fin 160, thereby The first flange 162 and the second flange 163 respectively form a flat top surface and a bottom surface at the top end and the bottom end of the heat dissipation fin group 16 , and the third flange 164 is opposite to the two protrusions 169 . The top end of the two protrusions 169 forms a support surface 172 at the side ends of the two protrusions 169.

Referring to FIG. 4 at the same time, a jig 20 is provided. The jig 20 includes a substrate 21 and two punches 22 extending downward from opposite sides of the substrate 21. Each punch 22 has a plate shape and a distal end thereof. The end is provided with a knife edge 221 which extends obliquely inwardly from the outside of the jig 20. The distance between the two punches 22 is slightly larger than the width of the intermediate portion 166 of each of the heat dissipation fins 160 along the direction in which the two protrusions 169 are connected.

When the heat sink 10 is assembled, the heat dissipation fin group 16 is slidably mounted on one side of the base 12 On the upper surface 122 of the base 12, the two protrusions 169 are received in the two recesses 126 of the base 12. The jig 20 is spanned on the heat dissipating fin set 16 , and the cutting edges 221 of the two punches 22 of the jig 20 are respectively aligned with the grooves 128 of the two abutting portions 125 of the base 12 and At the same time, the pressure is applied downwards, so that the two abutting portions 125 press down the bearing surface 170 of the protruding portion 169 of the heat dissipation fin group 16 to firmly fix the heat dissipation fin group 16 to the base 12 . It is easy to manufacture and allows for a tight and stable bond without the need for soldering between the two, resulting in cost savings and environmental friendliness. Since the two abutting portions 125 are respectively provided with the grooves 128, the position of the grooves 128 of the two abutting portions 125 is simultaneously impacted downward, and the abutting portion 125 is deformed downward to press the heat dissipating fin group. When the protruding portion 169 of the portion 16 is 169, the abutting portion 125 can be prevented from deforming the upper surface of the boss 123 of the base 12, thereby preventing the heat sink 10 from being passed through the mounting members provided on the two bosses 123. Assembly onto an electronic component affects its assembly. In addition, the two bearing surfaces 170 of the protruding portion 169 are disposed, and the two abutting portions 125 of the heat sink 10 are simultaneously punched downward by the jig 20, so that the force is more uniform, thereby enhancing the reliability. Sex. At the same time, the supporting surface 172 is respectively disposed under the bearing surface 170, and the supporting surface 172 can strengthen the bearing capacity of the bearing surface 170, thereby reinforcing the supporting of the abutting portion 125 by the two bearing surfaces 170, thereby achieving close cooperation between the two. Combination of. Secondly, since the two punches 22 of the jig are plate-shaped, each punch 22 presses the corresponding abutting portion 125 of the base 12 downward, and the abutting portion 125 and the heat radiating fin are obtained. The protruding portion 169 of the group 16 forms a linear tight fit, which is advantageous for increasing the contact area of the susceptor 12 with the heat dissipation fin group 16, and improving the fastening degree and heat dissipation efficiency of the heat sink 10.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and those skilled in the art will be able to cover the following modifications or variations in accordance with the spirit of the present invention. Within the scope of the patent application.

12‧‧‧ Pedestal

20‧‧‧ fixture

21‧‧‧Substrate

22‧‧‧ Punch

128‧‧‧ trench

166‧‧‧ middle part

169‧‧‧Protruding

221‧‧‧ knife mouth

Claims (12)

A heat sink includes a base and a heat dissipation fin set disposed on the base, wherein the base is provided with two spaced-apart fixing portions, each of which includes the base a boss extending upwardly from the seat and an abutting portion extending from the side of the boss adjacent to the other boss toward the other boss, the abutting portion and the boss and the base Forming a groove, a groove is formed on the upper surface of the abutting portion, and a protrusion is disposed on opposite sides of the heat dissipation fin group, and the heat dissipation fin group is received by the protrusion portion The groove of the seat is mounted on the base by pressing the groove position of the abutting portion, and the abutting portion is deformed by force to press the protruding portion of the heat dissipating fin group to assemble the heat dissipating fin group. On the base. The heat sink of claim 1, wherein the groove extends in a longitudinal direction of the abutting portion and penetrates to opposite sides of the base. The heat sink of claim 1, wherein the heat dissipation fin group is formed by a plurality of heat dissipation fins, each of the heat dissipation fins includes a body portion and a same direction of the two sides of the body portion a first folded edge and a second folded edge, the body portion includes an intermediate portion and two extending portions extending outward from opposite sides of the intermediate portion at a position near the bottom end thereof, The first hem is formed by bending the top end of the intermediate portion, and the second hem is formed by bending the bottom end of the intermediate portion and the two extending portions, and the extending portions of the heat dissipation fins constitute the heat dissipation fin Group of protrusions. The heat sink of claim 3, wherein the top end of each extension portion is bent to form a third flange, and the third flange of each heat dissipation fin is at the top end of the protrusion of the heat dissipation fin group. A bearing surface is formed, the projection being pressed against the bearing surface. The heat sink of claim 3, wherein each of the extending portions is bent away from a side away from the intermediate portion to form a fourth folded edge, and the fourth folded edge of each of the heat dissipating fins is disposed in the heat sink. fin The side ends of the protrusions of the sheet group form a support surface, and the support surface is supported below the pressing portion. The heat sink of claim 3, wherein each of the first hemming edge and the second hemming edge are respectively provided with a first folded edge and a second folded edge of the heat dissipating fin adjacent thereto The buckle structure is assembled by the snap structure. The heat sink of claim 1, wherein the heat sink fixes the heat sink fin set by simultaneously punching two abutting portions of the base by a jig. The heat sink of claim 1, wherein the abutting portion of the base forms a linear tight fit with the protruding portion of the heat dissipating fin set. A method of manufacturing a heat sink, comprising the steps of: providing a pedestal having two spaced apart fixing portions, each fixing portion including a boss extending upward from the pedestal and the boss An abutting portion extending toward a side of the other boss toward the other of the bosses, the abutting portion and the boss and the base enclosing a groove, the upper portion of the abutting portion a groove is disposed on the surface; a heat dissipation fin group is provided, and a protrusion is disposed on each of opposite sides of the heat dissipation fin group; the protrusion is received in the groove of the base and passed through a fixture Pressing the position of the groove of the abutting portion to assemble the heat dissipating fin to the base, the abutting portion is deformed by force to press the protruding portion of the heat dissipating fin group to assemble the heat dissipating fin group On the pedestal. The method for manufacturing a heat sink according to claim 9, wherein the heat dissipation fin group is slidably disposed on one side of the base to the base such that the protruding portion is received in the groove. The method of manufacturing a heat sink according to claim 9, wherein the fixture comprises a substrate and two punches extending downward from opposite sides of the substrate, and the heat sink fin is assembled to the During the process on the susceptor, the two punches respectively apply pressure to the groove positions of the two abutting portions of the pedestal. The method for manufacturing a heat sink according to claim 9, wherein the two punches are in the shape of a plate, and each punch presses the abutting portion and the heat radiating fin after punching the corresponding abutting portion of the base. Group of sudden The outlet forms a linear tight fit.