Aluminum Heatsink Extrusions

What is Aluminum Heatsink and How does it work?

The function of a aluminum heatsink is to prevent overheating in electrical components. The aluminum heatsinks are mainly made from aluminum extrusions. Because of the conductivity rates of metal, aluminium heat sink can carry the heat away. If without an effective heat sink, many electronics components/machines/equipment will burn out.

What heatsinks that FONNOV ALUMINIUM produce?

FONNOV ALUMINIUM is a professional extruded aluminum heat sink manufacturer, producing aluminium heatsink extrusions and machined aluminum heat sinks since the year 2004.

aluminum heat sink-fonnovaluminium

FONNOV ALUMINIUM extrudes heatsinks with national standard aluminum billet, we don’t produce with scrap aluminum. Once scrap aluminum is used, the surface is likely to be rough and the mechanical properties cannot be reached to the standard. FONNOV ALUMINIUM uses high-quality steel tooling dies to ensure that each side of the heatsink has high strength and toughness because each side has to withstand a large extrusion force. If there is a big difference in performance between each other, it is easy to break. FONNOV ALUMINIUM can produce heat sinks with a width of 500mm by 4000TON extrusion press. FONNOV ALUMINIUM has been engaged in the extrusion industry since 2004, there are hundreds of existing dies of the heatsink, which will help reduce your costs.

Extra machining works(such as CNC milling, hole punching, drilling, tapping, etc) can be done in the FONNOV fabrication factory for your direct use.

Existing Heatsinks

We have a large and wide range of existing tooling dies of the heatsink and electrical enclosure. The existing stocks are mainly of round heatsinks(hollow or solid) and straight fins type. You can check the below lists to see if any existing ones are workable for you. Designs will be different, so contact us for details now, and we believe we can help to save more costs for you with our existing tooling and stocks.

round heat sink hollow type-fonnovaluminium


round heatsink solid type-fonnovaluminium


heatsink straight fin-fonnovaluminium



How does FONNOV ALUMINIUM assure a high quality of heatsinks while production?

The production difficulty for heat sinks is larger than some usual profiles. Many fins on heatsinks are the main reason. How to assure getting quality heat sinks?

  1. Mostly, the steel tooling dies used for heatsinks production is better. There’re many fins on heat sinks, and each fin will be under great pressure while extrusion and this pressure are uneven, so we must make each fin very strong. The high quality of the H13 steel die will be reliable to prevent any fins from breaking.
  2. Avoiding fins breaking is also the main target while extrusion. What we should do is a careful extrusion and reduce the extrusion pressure.
  3. To get a perfect dimension as per drawing, the tooling die will be under several amending after each trial. So the heatsink extrusion is generally with several times trials.

What makes aluminum the best material for heatsinks?

Aluminum extrusion makes the production of heat sink easier and relatively low cost. Aluminium has good thermal conductivity and is easy to process into complex shapes. The commonly used AA6063 aluminum alloy has good thermal conductivity (160-180W/m·K). There are many shapes of extruded heatsinks, which are usually customized according to the needs of industry products, achieving the ideal heat dissipation effect. There are comb shapes, tree shapes, fishbone shapes, round shapes, and so on. Their common characteristics are: the distance between the heat sinks is short, the groove shape is formed between two adjacent heat sinks, and the aspect ratio is large. The wall thickness difference is large, the heat sink is usually thinner, and the bottom plate at the root is thicker. Increase the surface area of the aluminium profile, and the heat dissipation effect will be better. The surface of the extruded heatsink is anodized (always natural silver clear anodizing or black anodizing) to improve the corrosion resistance, wear resistance, and aesthetics of the aluminum material.

Where aluminum heatsinks usually used in?

Aluminium heatsinks are more and more widely used due to their good heat dissipation performance. They are mainly divided into large aluminum heat sink profiles for central air conditioning and transportation industry, and small precision high-powered aluminium profiles used in electronics and precision machinery and instrument industries. The big extruded aluminium heatsinks have a large cross-sectional size, with a width of 200~800mm, and need to be produced on a large extrusion press. The small aluminum heat sinks generally have a smaller cross-sectional size and stricter accuracy, which is quite difficult in extrusion production. To produce qualified heat sink extrusions, high-quality aluminum ingots, high-precision tooling dies and extrusion processes are all required. Aluminium heat sinks are widely used in lighting, automobiles, wind power generation, construction machinery, air compressors, railway locomotives, household appliances, computers, and other industries due to their excellent performance. Welcome to contact us [email protected] for your needs for the custom aluminum heat sink.

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