Amazing Aluminium Heatsink Process

By Author: Hxalu Hxalu
Total Articles: 3
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The mode of aluminium profiles production in our company is most compactable and endurable than any other company. Aluminium Heatsink can be classified in terms of manufacturing methods and their final form shapes. The most common types of air-cooled heatsinks include stampings, extrusions, forging, bonded/fabricated fins, die castings and folded fins. Following is an explanation of each technique.

Stampings - Copper or aluminium sheet metals are stamped into desired shapes. They offer a low cost solution to low density thermal problems. They are suitable for high volume production, because advanced tooling with high speed stamping would lower costs. Additional labour-saving options, such as clips and interface materials, can be factory applied to help to reduce assembly costs.

Aluminum Extrusions - This is the most popular method of manufacturing heatsinks. Extrusion is the process by which long straight metal parts can be produced. It is done by squeezing metal in a closed cavity through a tool, known ...
... as a die, using either a mechanical or hydraulic press. After the metal has cooled, it is cut to the size you want the heatsink to be, based on motherboard standard sizes.

Forging - This is the process whereby metal is heated and shaped by plastic deformation by suitably applying compressive force. Usually the compressive force is in the form of hammer blows using a power hammer or a press. Heatsink manufacturers rarely use this method but it is used occasionally, and is definitely worth mentioning.

Bonded/Fabricated Fins - Most air cooled aluminium heatsink are convection limited, and the overall thermal performance of an air cooled heatsink can often be improved significantly if more surface area can be exposed to the air stream. These high performance heatsinks utilise thermally conductive aluminium-filled epoxy to bond planar fins onto a grooved extrusion base plate.

Die Castings - Die casting is where the metal is injected into the mould under high pressure of 1,450-30,500psi. This results in a more uniform part, generally good surface finish and good dimensional accuracy, as good as 0.2% of casting dimension. In other words, you can make more complex shapes using die casting than you can using other methods such as extrusion.

Folded Fins - Corrugated sheet metal in either aluminium or copper increases surface area, hence the volumetric performance. The heatsink is then attached to either a base plate or directly to the heating surface via epoxying or brazing. It is not suitable for high aluminum profile heatsinks on account of the availability and fin efficiency. New types of trigger and multi-cell profiles with four square elements at the corner are developed. In terms of the crash energy absorption and weight efficiency, the new multi-cell structure shows dramatic improvements over the conventional square box column. The optimization process with the target of maximizing the specific energy absorption has been successfully carried out, and the example of design process is provided. In the optimization process, the problem of stable progressive folding is also addressed. The analytical solution for calculating the mean crushing force of new multi-cell profiles is derived showing good agreement with the numerical results.

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The article is written by Hxalu.com which is specially designed aluminium tile trim and aluminium carpet trim for sliding doors & windows at luxory homes. For information log on to http://www.hxalu.com