KR20040026943A - Method for manufacturing the heat sink using ultrasonic welding of fin - Google Patents

Abstract

PURPOSE: A method for manufacturing a heat sink is provided to improve heat emission efficiency by bonding fins to the heat sink through an ultrasonic welding process. CONSTITUTION: A heat sink manufacturing method includes the steps of fabricating fins used in a heat sink(S1) and fabricating a heat sink base(S2). Slots are formed in the heat sink base(S3). Then, fins are inserted into an ultrasonic welder(S4). After that, the fins inserted into the ultrasonic welder are inserted into the slots formed on the heat sink base(S5). Then, an ultrasonic welding process is carried out(S6). After performing the ultrasonic welding process, the fins are separated from the ultrasonic welder(S7). Then, impurities remaining around the heat sink are removed(S8), thereby forming the heat sink.

Description

Method for manufacturing heat sink using ultrasonic welding of fins {Method for manufacturing the heat sink using ultrasonic welding of fin}

The present invention relates to a manufacturing method of a heat sink used for releasing heat generated in a device which may cause abnormalities in use if heat is generated during use such as various communication repeaters, and thus does not emit heat. It relates to a method of manufacturing a heat sink with excellent heat dissipation efficiency compared to the method.

Recently, as the communication market is rapidly growing, many data can be transmitted. Now, there is a demand for a communication repeater to smoothly communicate in a wireless mobile communication at a long distance and a short distance. In general, a communication repeater is a simple base station, and is a device that receives a signal generated as a radio wave source and amplifies and transmits the signal at high frequency. Such a communication repeater has a built-in module for processing a large amount of data, such as a video, in particular in the case of mobile communication IMT2000 method is commercialized, due to the performance of the module for large-capacity processing inevitably generates high heat.

As a result, heat sinks that remove heat from these modules are manufactured in various ways for more efficient heat dissipation.However, due to the space constraints to control the heat generation of the module in the repeater, There are many limitations.

The heat sink manufactured using extrusion is shown in FIG. 1 in the conventional technology for fabricating the heat sink to solve these problems. In the case of the heat sink manufactured by the extrusion manufacturing method, the heat generation amount of the module in the repeater was increased, so that it was difficult to effectively radiate all of them. Therefore, the heat sink specification has a high fin height, as well as the production of a heat sink having a high placement density between the fin and the fin has been required, there was a lot of difficulties in manufacturing this as an extrusion manufacturing method.

In order to improve the shortcomings of the heat sink manufacturing method using the extrusion, the heat sink structure using the press compression can be shown in Figure 2 to increase the height of the fin and increase the batch density between the fin and the fin.

This manufacturing method is to produce a fin (12) separately in order to increase the heat dissipation efficiency by making one side of the heat sink base 13 part uneven structure to insert a separately produced fin (12) into the uneven structure and then insert the fin (12) insertion site The press was used to press the fin (12) to the heat sink base (13) using a press process. However, this press press manufacturing method is used for the thermal insulation effect of the air layer existing between the heat sink base and the fin during pressing. The heat transfer efficiency to be dissipated is lowered, and there is a limitation in the method of manufacturing a heat sink in various communication repeaters incorporating a module for processing large data such as moving pictures.

Therefore, an object of the present invention devised to solve the problems of the prior art as described above in the manufacture of a heat sink for dissipating heat generated in the module in the various communication repeaters to produce a heat sink with excellent heat dissipation efficiency compared to the conventional heat sink manufacturing method To provide a way to.

1 is a structure of a heat sink manufactured using a conventional extrusion

Figure 1a is a perspective view for explaining the heat sink manufacturing method using extrusion

FIG. 1B illustrates View "A" in FIG. 1A

Figure 2 is a structure of a heat sink manufactured using a conventional press compression

Figure 2a is a perspective view for explaining the heat sink manufacturing method using press compression

FIG. 2B illustrates View "B" in FIG. 2A

Figure 3 is a flow chart for manufacturing the heat sink of the present invention

Figure 4 is a perspective view of the manufacturing method of the heat sink using the ultrasonic welding of heat treatment of the present invention

Figure 4a is a perspective view

4b is a perspective view of the base

4c is a perspective view of the ultrasonic welding machine

Figure 4d is a perspective view of the insert inserted into the ultrasonic welding machine

(Describe where it was inserted)

Figure 4e is a perspective view of the insert into the base groove

5 is a structure of a heat sink manufactured by the method of the present invention

5A is a perspective view of a heat sink

FIG. 5B is a cross-sectional view taken along the line D-D 'of FIG. 5A

-Explanation of symbols for the main parts of the drawings-

10: Extrusion mold

11: heat sink

12, 14: 휜

13, 15: heat sink base

16: ultrasonic welding machine

Heat sink manufacturing method using the ultrasonic welding of the present invention for achieving the above object comprises the steps of producing a fin for use in the heat sink (S1); Manufacturing a heat sink base (S2); Processing a groove on the manufactured heat sink base (S3); Inserting the manufactured fin into an ultrasonic welder (S4); Inserting 휜 inserted into the ultrasonic welding machine into the heat sink base groove (S5); Performing ultrasonic welding (S6); Separating the fin in the ultrasound machine (S7); It is characterized in that it comprises a post-processing step (S8) to remove this material around the heat sink, the step of repeating the number of heat sink base grooves from step S4 to step S7 before the post-processing step (S8).

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows an overview of the present invention as a flow chart for a heat sink manufacturing method using the ultrasonic welding of heat treatment of the present invention at a glance.

First, by designing the specification of the fin and the base to be used for the heat sink to perform the step (S1) to produce a fin by a manufacturing method such as extrusion, cutting, press molding, sintering, injection or casting, and manufacturing a heat sink base ( After performing S2), the step (S3) of processing the grooves that can be inserted or positioned in the heat sink base is performed. Here, the shape of grooves is not limited to specific shapes such as groove shape or square shape.

After performing the step (S4) of inserting the manufactured fin into the ultrasonic welder, the step (S5) of inserting into the groove of the produced heat sink base is performed, and performing the ultrasonic welding (S6). After the ultrasonic welding is finished to perform the step (S7) to remove the pin inserted in the ultrasonic welding machine. At this time, the end of the step (S4) to the step (S7) as much as the number of the heat sink base groove, the end of repeated welding by the number of grooves to produce a heat sink through the post-processing step (S8) to remove the foreign matter around the heat sink.

Figure 4 shows a perspective view of the manufacturing method of the heat sink using the ultrasonic welding of the present invention, Figure 4a shows the shape of the fin 14 produced by a method such as compression, cutting, press forming, sintering, injection or casting 4B shows the shape of the heat sink base 15.

Fig. 4C shows a part of the ultrasonic welding machine for ultrasonic welding.

Fig. 4D shows the insertion of the fin into the ultrasonic welding machine.

Fig. 4E shows a state in which the fin inserted into the ultrasonic welding machine is inserted into the heat sink base groove. After that, ultrasonic welding is performed to start integration of the fin and the heat sink base.

5 shows a structure of a heat sink manufactured by using ultrasonic welding of the present invention. Here, a heat sink having an integrated heat sink base 20 and a fin 19 structure as shown in FIG. 5A can be seen. FIG. 5B shows a cross section of a heat sink manufactured by the method of the present invention, in which there is no air layer present between the fin 19 and the heat sink base 20 produced in the heat sink manufactured by a conventional press crimping method. It is possible to obtain a heat sink that can prevent the thermal insulation effect.

As described in detail above, the present invention has excellent heat dissipation efficiency in manufacturing a heat sink that emits heat generated in a device that may cause abnormalities in use if heat is generated during use, such as various communication repeaters, to release heat. The heat sink can be manufactured.

Claims (1)

In the manufacturing method of the heat sink, Manufacturing a fin for use in a heat sink (S1); Manufacturing a heat sink base (S2); Processing a groove on the manufactured heat sink base (S3); Inserting the manufactured fin into an ultrasonic welder (S4); Inserting 휜 inserted into the ultrasonic welding machine into the heat sink base groove (S5); Performing ultrasonic welding (S6); Repeating step S7 of removing the fin in the ultrasonic machine from step S4 to step S7 by the number of heat sink base grooves; It is characterized by consisting of a post-processing step (S8) for removing this material around the heat sink.