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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 molten metal is pressed through a die under high pressure to produce an extruded section with a length of up to 18 meters, which is then 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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