What is the difference between die casting heat sink and cold forged aluminum heat sink for sports lighting

At present, for the better-selling stadium lights on the market, the heat sinks are mainly divided into two categories. One is the pressure heat sink, the other is the cold-end heat sink. Which process to choose mainly depends on heat dissipation, cost and technology.

The die-casting heat sink is made by forcing molten aluminum into a metal die which consists of two die halves locked and held together by hydraulic pressure. This process can produce aluminum heat sinks with highly complex shapes, and die castings are characterized by high dimensional accuracy and stability even in the case of thin walls. Smooth or textured surfaces can be easily created and require minimal surface preparation before electroplating, coating, or finishing. Die casting is the most efficient and cost-effective large-scale production process for LED heat sinks. It allows the production of geometrically challenging finned heat sinks without affecting thermal integrity. The thermal conductivity of die castings varies with the composition of aluminum alloy. The thermal conductivity of ADC12 is 96 W/mk. Many stadium lights on the market are made of ADC12 die-casting.

Cold forging is a metal forming process in which metal materials undergo plastic deformation below their recrystallization temperature (usually at room temperature) under a large amount of pressure. Cold forgings are superior to many other processes in thermal conductivity, mechanical strength, dimensional accuracy, surface quality, manufacturing cost and productivity. This process can achieve favorable grain flow and improve the thermal properties. Cold forging heat sinks usually have 80% more thermal energy than die-casting heat sinks. Cold-forged heat sinks using 1000 series aluminum alloy have thermal conductivity ranging from 220 W/mk to 240 W/mk. The aiko stadium lamp is made of AL1070 aluminum alloy and made by cold-end process.

From the above, it can be seen that using AL1070 cold forging to make stadium lamp is better than using ADC12 die-casting to do stadium lamp in terms of heat dissipation. Then why not all manufacturers choose AL1070 material, cold-end process?


This involves two other aspects. Cost and technical level. For heat sinks of the same size and weight, AL1070 cold forging is much more expensive than ADC12 die casting. There is also a technical level. Course lights are often very large, and need a lot of fins for heat dissipation, the selection of cold forged aluminum, need to have a high level of lamp design in order to open the mold successfully. We know that a company designed a 1500W 1800W stadium lamp and chose the cold forging technology. as a result, it took more than two years to open the mold successfully because of the technical level.

AIKO professional stadium lights all use AL1070 cold forging technology. A relatively small size of lamps and lanterns can achieve a good heat dissipation effect. Whether it is a replacement project or a new project, the load bearing of the lamp pole can be greatly reduced. There is no denying it, but from the point of view of the lamp fixtures, our price is relatively high. But considering the cost of the whole project, especially the small and light heat sink, which can greatly reduce the cost of the pole, Aiko’s stadium lamp is undoubtedly the most advantageous.

For more information, please contact us.


Email: info@aikoled.com

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