Heat sink structure and manufacturing method thereof

Abstract

A heat sink structure and a manufacturing method thereof. The heat sink includes a main body and multiple radiating fins each having a folded root section. The main body has multiple connection channels formed on a circumference of the main body.The multiple radiating fins are placed in a mold. A mechanical processing measure is used to high-speed impact the main body so as to thrust the main body into the mold. Accordingly, the folded root sections of the radiating fins are relatively high-speed thrust into the connection channels of the main body to tightly integrally connect with the main body.

Description

[0001]This application claims the priority benefit of Taiwan patent application number 101127730 filed on Aug. 1, 2012.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to an improved heat sink structure and a manufacturing method thereof, and more particularly to an annular heat sink structure and a manufacturing method thereof.[0004]2. Description of the Related Art[0005]The conventional cylindrical heat sink includes a cylindrical body and multiple radiating fins connected to the circumference of the cylindrical body. There are several conventional measures for connecting the radiating fins to the circumference of the cylindrical body. For example, Taiwanese Invention Patent Application No. 098105429 discloses a cylindrical heat sink and a method of tightly planting radiating fins of the heat sink and an application device thereof. According to the method, a mold seat drivable by a power source to create stepped rotational ope...

AI Technical Summary

Benefits of technology

The present invention provides a heat sink structure with raised / recessed non-planar surfaces to enhance connection friction between the main body and radiating fins. Additionally, the heat sink structure has more radiating fins and better heat dissipation efficiency. The manufacturing method involves high-speed thrusting the main body into the internal space and moving it relative to the multiple radiating fins, resulting in quick and tightly integrally connection between the main body and radiating fins.

Problems solved by technology

1. The riveting process is a pressing process in which a mechanical measure is used to connect two components into an integrated body. The radiating fin is connected with the channel by means of riveting so that the junction between the radiating fin and the channel is deformed. As a result, the junction between the radiating fin and the channel is irregular and gaps exist between the radiating fin and the channel. This will affect the heat transfer efficiency.

2. The outer surface of the cylindrical body not only is formed with the channels, but also is formed with the guide grooves. The channels and the guide grooves are alternately arranged. That is, the number of the channels per unit surface area is reduced. As a result, the number of the mounted radiating fins is reduced.

3. The guide grooves on two sides of the channel are pressed to deform the channel and press the radiating fin to tightly integrally connect the radiating fin with the channel. This is likely to make the edges of the opening of the channel outward curl and warp. Therefore, the opening of the channel will be expanded. As a result, the radiating fin is apt to detach from the channel.

4. The manufacturing method includes numerous steps so that the manufacturing time is quite long.

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