TWI566865B - Heat sink and method of making the same - Google Patents

Description

Radiator and method of manufacturing same

The present invention relates to a heat sink, and more particularly to a heat sink having a shovelled fin.

With the rapid development of the electronics industry and the trend of miniaturization and light weight, the large increase in heat is inevitable, and in order to prevent the temperature rise environment generated by the heat source from affecting the operation of electronic components, The demand for heat dissipation is also increasing day by day. It is common practice to directly attach the heat sink to the heat generating component. Therefore, the heat sink needs to have good heat conduction force to improve the heat dissipation performance of the heat generating component.

Conventional annular heat sinks can be roughly classified into aluminum extrusion type and combined type. Among them, the aluminum extruded annular heat sink can only form a simple shape due to the limitation of the aluminum extrusion process, and it is impossible to manufacture a heat sink with a high fin density, and there is still a relatively large spacing between the fins, so that the fin The number of sheets and the heat dissipation area are insufficient, so that the heat dissipation effect is poor, and the high-efficiency electronic components cannot achieve the effect of rapid heat dissipation, thereby affecting the use efficiency of the electronic components.

The combined annular heat sink is first made of a plurality of heat dissipation fins and an annular base, and then a plurality of heat dissipation fins are mounted on the base to increase the density of the fins and increase the heat dissipation area. However, the heat dissipating fins of the combined annular heat sink and the base are assembled with each other, and are not integrally formed. Therefore, there is a gap between the base and each of the heat radiating fins, resulting in excessive thermal resistance and lowering overall heat conduction performance. Is not conducive to heat dissipation.

So how to increase the number of fins on the heat sink and shrink The spacing between the fins reaches the doubled total heat area and reduces the thermal resistance. This is the standard that the industry has been trying to break through.

In view of the above problems, the present invention provides a heat pipe type heat sink and a manufacturing method thereof, thereby solving the conventional aluminum extrusion type annular heat sink, and the heat sink having a high fin density cannot be fabricated due to the limitation of the aluminum extrusion process, so that the heat dissipation area is insufficient. . Or, the heat dissipating fins and the pedestals of the conventional combined annular heat sink are mutually connected and have a gap, which leads to excessive thermal resistance and reduced heat conduction performance, which is disadvantageous for heat dissipation.

To this end, the present invention provides a method of manufacturing a heat sink, comprising the steps of: (a) providing a body, the body is in the shape of a cylinder; (b) providing the body on a shovel table, and the shovel machine Having a cutter; (c) driving the body in a forward direction by a shovel machine, and applying a shovel process along the circumference of the body to form a fin on the periphery of the body; (d) exiting the cutter to Rotate the body in the opposite direction; (e) feed the tool, rotate the body in the forward direction, and apply a cutting process along the circumference of the body with the tool to form another adjacent fin on the periphery of the body, so that the fins and the other A spacing is formed between the fins; (f) steps (d), (e) are repeated to form a plurality of fins.

In an embodiment of the method of manufacturing a heat sink of the present invention, the tool is shoveled from a starting point and stopped being shoveled to a termination point, and the cutting stroke from the starting point to the ending point is equal to the cutting length of the fin.

In an embodiment of the method of manufacturing the heat sink of the present invention, the starting point is displaced by a distance in the forward direction to form another starting point, and the cutter system starts to shovel the other fin from another starting point, and stops the shovel. The other end point is cut, and the distance at which the starting point is displaced is equal to the distance between the fin and the other fin.

In an embodiment of the method of manufacturing a heat sink of the present invention, each of the fins extends outward in a tangential direction along a tangential direction of the body.

The invention also provides a heat sink manufactured by the above manufacturing method, wherein the body has a plurality of fins, and the shape of the body is a circle In the cylinder, a plurality of fins are disposed around the circumference of the body, and the plurality of fins extend radially outward in the forward direction.

The invention further provides a method for manufacturing a heat sink, comprising the steps of: (a) providing a body, wherein the body is in the shape of a polygonal cylinder; (b) providing the body on a cutting machine, and the cutting machine has (c) applying a cutting process to one side of the body by the cutter to form a plurality of fins on the side of the body; (d) exiting the cutter, and rotating the body to rotate in a reverse direction by the scraping machine; Feeding the tool, applying a cutting process to the other side of the body to form another plurality of fins on the other side of the body; (f) repeating steps (d), (e) to form a plurality of fins On each side of the body.

In an embodiment of the method for manufacturing a heat sink of the present invention, the plurality of fins are bent away from the body direction to form a gap between the adjacent two fins.

In an embodiment of the method for manufacturing the heat sink of the present invention, the other plurality of fins are bent away from the body direction to form a gap between the adjacent two fins.

The present invention also provides a heat sink manufactured by the above manufacturing method, wherein the body has a polygonal column shape, and each side of the body has a plurality of fins, and the plurality of fins are surrounded by the body. Extend outward.

In an embodiment of the heat sink of the present invention, a gap is formed between each of the two fins adjacent to each other.

The effect of the invention is that the heat sink not only uses the cutting process to produce high-density fins with low thermal resistance, but also can greatly increase the heat dissipation area, and can improve the overall heat dissipation performance, and also utilizes the technical means of rotating the body to simplify. Process to increase productivity. Therefore, it has better heat dissipation and usability than conventional techniques.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

100‧‧‧heatsink

110‧‧‧ body

120‧‧‧Weekly

130‧‧‧Fins

140‧‧‧ spacing

200‧‧‧heatsink

210‧‧‧ body

220‧‧‧ side

230‧‧‧Fins

240‧‧‧ gap

300‧‧‧Scraping machine

310‧‧‧Tools

P10‧‧‧ 顺向

P20‧‧‧ reverse direction

S‧‧‧ starting point

S ₁ ‧‧‧ termination point

L‧‧‧ distance

Figure 1 is a perspective view of a first embodiment of a heat sink of the present invention.

2A to 2C are schematic views showing the operation of the shoveling process in the first embodiment of the present invention.

Figure 3 is a plan view showing the first embodiment of the present invention.

Figure 4 is a flow chart showing the fabrication of the first embodiment of the present invention.

Figure 5 is a perspective view of a second embodiment of the heat sink of the present invention.

6A to 6C are views showing the operation of the shoveling process in the second embodiment of the present invention.

Figure 7 is a plan view showing a second embodiment of the present invention.

Figure 8 is a flow chart showing the fabrication of the second embodiment of the present invention.

The heat sinks 100 and 200 of the second embodiment of the present invention are described as an embodiment with a heat sink having a shoveled fin, but are not limited to the type disclosed in the embodiment. The technician can change the appearance of the heat sink 100 of the present invention according to actual design requirements or usage requirements.

Please refer to FIG. 1 to FIG. 3 , which are respectively a schematic perspective view and a plan view of a first embodiment of the heat sink according to the present invention, and a shoveling process. The heat sink 100 is manufactured by a shoveling process, and the heat sink 100 includes a body 110 and a plurality of fins 130, which may be made of aluminum, aluminum alloy or other metal materials. It is applied to the cutting process and has good heat dissipation. Referring to the manufacturing flow chart of the heat sink of the first embodiment shown in FIG. 4 at the same time. In step S401, a body 110 is provided, and the shape of the body 110 is a cylinder, as shown in FIG.

Step S402, the body 100 is disposed on a shovel table 300, and the shovel machine 300 is provided with a cutter 310, and the cutters 310 may be disposed in parallel or at an angle to the shovel station 300, and Phase The reciprocating movement of the scraping machine table 300 is performed to perform the operations of the infeed and the retraction.

In step S403, the tool 310 is contacted with the body 110, and the body 110 is rotated by a cutting machine 300 along a forward direction P10. The cutter 310 is subjected to a cutting process along the circumference 120 of the body 110 to form a fin. 130 is on the periphery 120 of the body 110. Wherein, the cutter 310 is shoveled from a starting point S on the circumference 120 of the body 110, and stops being shoveled at a termination point S1, and the cutting stroke from the starting point S to the ending point S1 is equal to the fin 130. The length of the shovel is as shown in Figure 2A.

Step S404, the tool 310 is withdrawn, and the body 110 is rotated in a reverse direction P20, the purpose of which is to retract the previous cutting stroke, and at the same time, the starting point S position on the body 110 can be returned to the previous starting of the cutting. The position is shown in Figure 2B.

Step S405, feeding the tool 310, rotating the body 110 in the forward direction P10, and applying a cutting process along the circumference 120 of the body 110 with the cutter 310 to form an adjacent other fin 130 on the periphery 120 of the body 110. A spacing 140 is formed between the fins 130 and the other fins 130. It should be noted that, as shown in FIG. 1 , each fin 130 of the heat sink 100 of the present embodiment is disposed around the circumference 120 of the body 110 , and each fin 130 is maintained at the same length.

Therefore, when the body 110 is rotated in the reverse direction P20, the starting point S is displaced by a distance L in the forward direction P10, so that the position of the starting point S is changed to form another starting point S (indicated by a broken line in the figure). The cutter 310 starts shoveling the other fin 130 from the starting point S after the displacement. In contrast, when the starting point S is displaced, the ending point S1 is also displaced, so that the other fin 130 stops cutting to another ending point S1 (indicated by a broken line in the figure). The distance L between the starting point S (shown by a broken line in the figure) and the previous starting point S is equal to the spacing 140 between the adjacent two fins 130, as shown in FIG. 2B. Figure 2C shows.

Step S406, by repeating the above-described cutting step S404, S405, to form a plurality of fins 130. The plurality of fins 130 are disposed around the periphery 120 of the body 110, and each of the fins 130 radially outwardly extends along the tangential direction of the body 110 in the forward direction P10, so that the overall appearance of the heat sink 100 is substantially The shape of the sun flower is shown in Figure 3.

Therefore, the fin 130 made by the invention can be thinner than the general aluminum extrusion, and has high density, can greatly increase the heat dissipation area thereof, and the fin 130 and the body 110 are integrally formed. It has low thermal resistance and fast heat conduction, achieving rapid heat dissipation. At the same time, the fins 130 extending radially along the tangential direction of the body 110 are offset from the surrounding air to accelerate the convection between the air so that the hot air does not stay in the fins 130. Furthermore, the heat dissipation performance of the entire heat sink 100 is further improved.

Please refer to FIG. 5 to FIG. 7 , which are perspective views, operation schematics and front views of a second embodiment of the heat sink of the present invention. Referring to the manufacturing flow chart of the heat sink of the second embodiment shown in FIG. In the second embodiment of the present invention, the heat sink 200 and the manufacturing method are similar to those disclosed in the first embodiment, so that the following details only explain the technical differences of the second embodiment disclosed in the present invention. .

The heat sink 200 of this embodiment includes a body 210 and a plurality of fins 230. Step S801, a body 210 is provided, and the shape of the body 210 is a polygonal cylinder, such as a square cylinder shape, a five-sided cylinder or a hexagonal cylinder. The embodiment is illustrated by a square, as shown in FIG. .

Step S802, the body 210 is disposed on a shovel table 300, and the shovel machine 300 is provided with a cutter 310, wherein the cutters 310 may be disposed in parallel or at an angle to the shovel station 300, and The reciprocating movement can be performed with respect to the scraping machine table 300 to perform the operations of the infeed and the retraction.

In step S803, the tool 310 is contacted with the body 210, and the tool 310 is subjected to a cutting process along a side surface 220 of the body 210 to form a plurality of fins 230 on one side 220 of the body 210. The above The body 210 has a projection extending outwardly from each of the four sides of the body 210 along the respective sides 220 for providing the thickness of the meat required to shovel the fins 230. Thus, the cutter 310 is formed by the side 220 and the projection of the body 210. A plurality of fins 230 are shredded. Then, the plurality of fins 230 that are shoveled in the shovel process are bent away from the body 210, so that a gap 240 is formed between the adjacent two fins 230, wherein the plurality of fins 230 are formed. It may be perpendicular to the side 220 of the body 210 or may be inclined at an angle to the side 220 of the body 210, as shown in FIG. 6A.

Step S804, the tool 310 is withdrawn, and the body 300 is rotated by the scraping machine 300 in a reverse direction P20, so that the other side 220 of the body 210 can be rotated to a position corresponding to the cutter 310 for performing a cutting process, such as Figure 6B shows.

In step S805, the tool 310 is fed, and the other side 220 of the body 210 is subjected to a cutting process to form another plurality of fins 230 on the other side 220 of the body 210, as shown in FIG. 6C.

Step S806, by repeating the above-described shoveling steps S804, S805, to form a plurality of fins 230 on the respective sides 220 of the body 210, and the plurality of fins 230 are extended outward from the periphery of the body 210, as in the seventh The figure shows. Therefore, the fin 230 made by the invention can be thinner than the general aluminum extruded product, and has high density, can greatly increase the heat dissipation area thereof, and the fin 230 is integrally formed with the body 210. It has low thermal resistance and fast heat conduction, achieving rapid heat dissipation.

It can be clearly seen from the above embodiments of the present invention that the heat sink of the present invention can form a heat sink fin by a cutting process, and can not only solve the conventional aluminum extruded ring heat sink, because of the limitation of the aluminum extrusion process. It is impossible to make a heat sink with a high fin density, so that the heat dissipation area is insufficient, or the heat dissipation fins and the base of the combined annular heat sink are connected to each other with a gap, resulting in excessive thermal resistance and reduced heat conduction performance. Not conducive to heat dissipation. At the same time, the technical means of rotating the body is utilized to enable a plurality of fins to be formed quickly. Around the body, there is no need to repeatedly set the position of the tool and the body, which can effectively simplify the process and increase productivity.

Compared with the prior art, the heat sink of the present invention not only uses the cutting process to produce high-density fins with low thermal resistance, but also greatly increases the heat dissipation area, and can improve the overall heat dissipation performance, and also utilizes the rotating body. Technical means to simplify the process to increase productivity. Therefore, it has better heat dissipation and usability than conventional techniques.

Although the embodiments of the present invention are disclosed above, it is not intended to limit the present invention, and those skilled in the art, regardless of the spirit and scope of the present invention, the shapes, structures, and features described in the scope of the present application. And the number of modifications may be made, and the scope of patent protection of the present invention shall be determined by the scope of the patent application attached to the specification.

100‧‧‧heatsink

110‧‧‧ body

120‧‧‧Weekly

130‧‧‧Fins

140‧‧‧ spacing

Claims (9)

A method of manufacturing a heat sink, comprising the steps of: (a) providing a body, wherein the body is in the shape of a cylinder; (b) providing the body on a cutting machine table, and the cutting machine has a cutter (c) driving the body in a forward direction by the cutting machine, the tool is subjected to a cutting process along the circumference of the body to form a fin on the periphery of the body; (d) exiting the tool Rotating the body in a reverse direction; (e) feeding the tool, rotating the body in the forward direction, and applying a cutting process along the circumference of the body with the cutter to form another adjacent one of the fins Forming a spacing between the fin and the other of the fins on the periphery of the body; and (f) repeating steps (d), (e) to form a plurality of the fins. The manufacturing method of claim 1, wherein in the step (c), the tool starts to shovel from a starting point, and stops shoveling at a termination point, and the shovel from the starting point to the ending point The cutting stroke is equal to the cutting length of the fin. The manufacturing method of claim 2, wherein in the step (e), the starting point is displaced by a distance along the forward direction to form another starting point, and the tool is another The starting point begins to sculpt another fin and stops sculling at the other end point, and the starting point is displaced by a distance equal to the spacing between the fin and the other fin. The manufacturing method of claim 1, wherein in the step (f), each of the fins extends outward in a tangential direction of the body in the forward direction. A method for manufacturing a heat sink, comprising the steps of: (a) providing a body, wherein the body is in the shape of a polygonal cylinder; (b) providing the body on a cutting machine, and the cutting machine has a a tool; (c) applying a cutting process to one side of the body by the tool to form a plurality of fins on the side of the body; (d) withdrawing the tool, and driving the body along the cutting machine Rotating in the reverse direction; (e) feeding the tool, applying a shoveling process to the other side of the body to form another plurality of fins on the other side of the body; and (f) repeating step (d), (e) forming the fins on each of the sides of the body. The manufacturing method of claim 5, wherein in the step (c), the fins are bent away from the body direction such that a gap is formed between the adjacent two fins. The manufacturing method of claim 6, wherein in the step (e), the other fins are bent away from the body direction to form a gap between the adjacent two fins. A heat sink manufactured by the manufacturing method of claim 5, wherein the body has a shape of a polygonal cylinder, and each side of the body has the fins, and the fins are The circumference of the body extends outward. The heat sink of claim 8, wherein a gap is formed between each of the two fins adjacent to the side.