TW201524333A - Heat dissipating device and method of manufacturing the same - Google Patents

Abstract

A heat dissipating device includes a base and a heat dissipating fin. The base includes an accommodating recess formed thereon. The heat dissipating fin includes a heat dissipating portion and a protruding portion, wherein the protruding portion protrudes from an end of the heat dissipating portion and is disposed in the accommodating recess. The base and the heat dissipating fin are combined with each other by a punching process, such that a first side wall of the accommodating recess covers at least a part of the protruding portion.

Description

Heat sink and method of manufacturing same

The invention relates to a heat dissipating device and a manufacturing method thereof, in particular to a heat dissipating device combining a pedestal and a heat sink by a stamping process and a manufacturing method thereof.

Heat sinks are closely related to the development of electronic products. Since the current in the circuit generates unnecessary heat due to the influence of the impedance when the electronic product is in operation, if the thermal energy cannot be effectively eliminated and accumulated on the electronic components inside the electronic product, the electronic component may be raised because of the rising The temperature is damaged. Therefore, the advantages and disadvantages of the heat sink affect the operation of electronic products.

Please refer to FIG. 1 , which is a schematic diagram of a heat sink 1 of the prior art. As shown in FIG. 1, the heat sink 12 is provided on the base 10 of the heat sink 1. As shown in Fig. 1, the heat sink 12 is integrally formed with the susceptor 10 by a die casting process. Due to the demolding requirements in the die casting process, the fins 12 need to have a draft angle α of two to three degrees, so the overall weight is heavy and the fin height is limited. In addition, in the same size heat sink, the draft angle α causes the number of fins to be small, resulting in insufficient heat dissipation area and poor heat dissipation performance.

The invention provides a heat dissipating device combining a pedestal and a heat sink by a stamping process and a manufacturing method thereof to solve the above problems.

According to an embodiment, the heat sink of the present invention includes a base and a heat sink. The base includes a receiving slot. The heat sink includes a heat dissipating portion and a protruding portion, wherein the protruding portion protrudes from one end of the heat dissipating portion and is disposed in the receiving groove. The pedestal and the heat sink are combined in a stamping process such that one of the first side walls of the accommodating groove covers at least a portion of the protrusion.

According to another embodiment, the method for manufacturing the heat sink of the present invention comprises: providing a pedestal and a heat sink, wherein the pedestal comprises a receiving groove, the heat sink comprises a heat dissipating portion and a protruding portion, and the protruding portion is self-heating portion One end protrudes; the protrusion is disposed in the receiving groove; and the base and the heat sink are stamped by a punch in a stamping process, so that one of the first sidewalls of the receiving groove covers at least a portion of the protrusion.

In summary, the present invention combines a susceptor and a heat sink in a stamping process. After the stamping process, the sidewall of the receiving groove of the base deforms to cover at least a portion of the protruding portion of the heat sink, so that the base is tightly coupled with the heat sink. Therefore, the heat sink of the present invention can eliminate the need for the draft angle of the heat sink. In addition, the heat sink of the present invention has a light overall weight and the fin height can be made higher than conventional heat sinks. Furthermore, in the same size heat sink, the number of heat sinks of the present invention can be installed more than the conventional heat sink, thereby increasing the heat dissipation area and improving the heat dissipation performance.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1,3,3'‧‧‧heating device

2‧‧‧ Punch

10, 30‧‧‧ Pedestal

12, 32, 32'‧‧ ‧ heat sink

300‧‧‧ accommodating slots

320‧‧‧ Department of heat dissipation

322‧‧‧Protruding

324‧‧‧ slit

326‧‧‧ hole

328‧‧‧ dent

‧‧‧‧Release angle

S1‧‧‧ first side wall

S2‧‧‧ second side wall

A-A‧‧‧ hatching

S10-S14‧‧‧Steps

Figure 1 is a schematic illustration of a prior art heat sink.

Fig. 2 is a perspective view of a heat sink according to a first embodiment of the present invention.

Fig. 3 is a flow chart showing a method of manufacturing the heat sink in Fig. 2.

Fig. 4 is a cross-sectional view of the heat sink device taken along line A-A in Fig. 2.

Figure 5 is a cross-sectional view of the heat sink of Figure 4 before the stamping process.

Fig. 6 is an exploded view of the heat sink device in Fig. 5 before the stamping process.

Figure 7 is a perspective view of the heat sink of Figure 6 in another perspective.

Figure 8 is a cross-sectional view of the heat sink according to the second embodiment of the present invention before the stamping process.

Figure 9 is a cross-sectional view of the heat sink of Figure 8 after the stamping process.

Please refer to FIG. 2 to FIG. 7 , and FIG. 2 is a heat dissipation according to the first embodiment of the present invention. 3 is a perspective view of a method of manufacturing the heat sink 3 in FIG. 2, and FIG. 4 is a cross-sectional view of the heat sink 3 along line AA of FIG. 2, and FIG. 5 is a fourth view. FIG. 6 is a cross-sectional view of the heat sink 3 before the stamping process, FIG. 6 is an exploded view of the heat sink 3 in FIG. 5 before the stamping process, and FIG. 7 is the heat sink 32 of FIG. 6 at another angle of view. Stereo picture.

As shown in FIG. 2, the heat sink 3 of the present invention includes a base 30 and a plurality of heat sinks 32. The number of the heat sinks 32 can be determined according to the actual application, and the embodiment shown in FIG. 2 is not limit. In this embodiment, the base 30 can be made of copper, aluminum or other thermally conductive material, and the heat sink 32 can be made of aluminum or other thermally conductive material. As shown in FIG. 4 , the pedestal 30 includes a accommodating groove 300 , and the heat sink 32 includes a heat dissipating portion 320 and a protruding portion 322 . The protruding portion 322 protrudes from one end of the heat dissipating portion 320 and is disposed in the accommodating groove 300 . in. The susceptor 30 is combined with the heat sink 32 in a stamping process such that one of the first side walls S1 of the accommodating groove 300 covers at least a portion of the protrusion 322 such that the susceptor 30 is tightly coupled to the heat sink 32.

In this embodiment, the protruding portion 322 of the heat sink 32 may protrude from one end of the heat dissipating portion 320 in a drawing forming process, so that one side of the protruding portion 322 forms a slit 324 before the stamping process, as shown in FIG. 5 to FIG. Figure 7 shows. Therefore, the protrusion 322 is U-shaped before the stamping process. In addition, the present invention can form two holes 326 at opposite ends of the protrusion 322 to facilitate forming the protrusion 322 in a stretch forming process. In this embodiment, the protrusion 322 is a continuous elongated structure. However, in another embodiment, the protrusion 322 can also be a discontinuous strip-like structure (eg, a dashed line), depending on the application.

When manufacturing the heat sink 3 described above, first, the step S10 shown in FIG. 3 is performed to provide the susceptor 30 and the heat sink 32. Next, in step S12 shown in FIG. 3, the protruding portion 322 of the heat sink 32 is placed in the receiving groove 300 of the base 30. Finally, step S14 shown in FIG. 3 is performed, and the base 30 and the heat sink 32 are punched by the punch 2 shown in FIG. 5 in the stamping process, so that the first side wall S1 of the receiving groove 300 of the base 30 is wrapped. At least a portion of the protrusion 322 of the heat sink 32 is covered. As shown in FIGS. 4 and 5, the slit 324 is adhered after the stamping process to form a recess 328 on one side of the protruding portion 322. Therefore, the second side wall S2 of one of the receiving slots 300 of the base 30 is rushed After the pressing process, it will engage with the recess 328, wherein the first side wall S1 is opposite to the second side wall S2. The first side wall S1 of the accommodating groove 300 covers at least a portion of the protruding portion 322, and the second side wall S2 of the accommodating groove 300 is engaged with the recess 328, so that the susceptor 30 and the heat sink 32 can be more tightly coupled. It should be noted that the punch 2 can be appropriately designed such that after the punch 2 punches the base 30 and the heat sink 32, the first side wall S1 of the receiving groove 300 of the base 30 completely covers the protruding portion of the heat sink 32. 322.

For the 4th and 5th figures, please refer to Figure 8 and Figure 9. Figure 8 is a cross-sectional view of the heat sink 3' according to the second embodiment of the present invention before the stamping process, and Figure 9 is a cross-sectional view of the heat sink 3' of Figure 8 after the stamping process. The main difference between the heat sink 3' and the heat sink 3 described above is that the heat sink 32' of the heat sink 3' is formed by a die casting process. As shown in Fig. 8, since the fins 32' are formed by a die-casting process, the protrusions 322 do not have the slits 324 described above. Therefore, after the susceptor 30 and the heat sink 32' are punched, the recess 328 is not formed on one side of the protruding portion 322, as shown in FIG. It should be noted that the components of the same reference numerals as those shown in FIGS. 4 to 5 are substantially the same, and will not be described again.

In summary, the present invention combines a susceptor and a heat sink in a stamping process. After the stamping process, the sidewall of the receiving groove of the base deforms to cover at least a portion of the protruding portion of the heat sink, so that the base is tightly coupled with the heat sink. Therefore, the heat sink of the present invention can eliminate the need for the draft angle of the heat sink. In addition, the heat sink of the present invention has a light overall weight and the fin height can be made higher than conventional heat sinks. Furthermore, in the same size heat sink, the number of heat sinks of the present invention can be installed more than the conventional heat sink, thereby increasing the heat dissipation area and improving the heat dissipation performance.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

3‧‧‧heating device

30‧‧‧Base

32‧‧‧ Heat sink

300‧‧‧ accommodating slots

320‧‧‧ Department of heat dissipation

322‧‧‧Protruding

328‧‧‧ dent

S1‧‧‧ first side wall

S2‧‧‧ second side wall

Claims (14)

A heat dissipating device includes: a pedestal including a accommodating groove; and a heat sink including a heat dissipating portion and a protruding portion protruding from one end of the heat dissipating portion and disposed in the accommodating groove The pedestal and the heat sink are combined in a stamping process such that a first side wall of the accommodating groove covers at least a portion of the protruding portion. The heat dissipating device of claim 1, wherein the protrusion protrudes from one end of the heat dissipating portion by a stretch forming process such that one side of the protruding portion forms a slit before the stamping process. The heat dissipating device of claim 2, wherein the slit is adhered after the stamping process to form a recess on one side of the protruding portion. The heat dissipating device of claim 3, wherein a second sidewall of the receiving slot is engaged with the recess after the stamping process, and the first sidewall is opposite to the second sidewall. The heat dissipating device of claim 1, wherein the opposite ends of the protruding portion are formed with two holes. The heat sink of claim 1, wherein the heat sink is formed by a die casting process. The heat sink of claim 1, wherein the protrusion is a continuous or discontinuous strip structure. A method for manufacturing a heat dissipating device includes: providing a pedestal and a heat sink, wherein the pedestal includes a receiving groove, the heat sink includes a heat dissipating portion and a protruding portion protruding from one end of the heat dissipating portion Providing the protrusion in the accommodating groove; and punching the pedestal and the heat sink with a punch in a stamping process, so that one of the first side walls of the accommodating groove covers at least a part of the protruding portion . The method for manufacturing a heat dissipating device according to claim 8, further comprising: forming the protrusion from one end of the heat dissipating portion by a drawing forming process such that one side of the protruding portion forms a slit before the stamping process. The method of manufacturing a heat sink according to claim 9, wherein the slit is adhered after the stamping process to form a recess on one side of the protruding portion. The method of manufacturing a heat sink according to claim 10, wherein a second side wall of the receiving groove is engaged with the recess after the stamping process, and the first side wall is opposite to the second side wall. The method for manufacturing a heat dissipating device according to claim 8, further comprising: forming two holes at opposite ends of the protruding portion. The method for manufacturing a heat sink according to claim 8, further comprising: forming the heat sink by a die casting process. The method of manufacturing a heat sink according to claim 8, wherein the protrusion is a continuous or discontinuous strip structure.