The extrusion process Cooling in series
Profile heat sinks are classic among electronic heat sinks. Their cooling fins offer a large surface area for reliable cooling of the electronic components through natural convection. Extruded heat sinks are typically manufactured from an aluminum extrusion alloy, less often from high-grade aluminum or high-grade copper.
How it works
In the extrusion process, the metal, which is heated to 450 to 500 °C, is pressed through a die under high pressure and the resulting 6 to 7 metre long profile strand is cut to length after cooling. The individual design of the extrusion tool defines the design and therefore also the cooling capacity. Once a die is manufactured, it can be used to produce numerous heat sinks.
If required, the cooling capacity of extruded heat sinks can be optimized by CNC machining and/or surface finishing.
The benefits
- High piece rates
- Low production and piece costs
- Complex heat sink geometries
- Good thermal conductivity
- Aluminum continuous cast alloy: 180 W/mK
- High-grade aluminum: 235 W/mK
- High-grade copper: 400 W/mK
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