There are more and more models of profile radiators, insert radiators, and electronic radiators, with hundreds to thousands of specifications, which are commonly used in electronics, household appliances, mechanical equipment and other fields. The main function is to absorb the heat generated by the electronic components, and then transfer and radiate it, thereby reducing the temperature of the components and avoiding damage to the components due to too high operating temperature; currently commonly used heat sink materials mainly use aluminum alloy and copper Alloy, and other materials. Let's introduce it below.
The folded heat sink is to fold the metal sheet into a fin array shape. Since the folded metal sheet is soldered to the bottom of the heat sink by soldering and brazing, additional thermal resistance is caused on the interface. The increase in manufacturing steps increases the cost. It is also difficult to manufacture fins with small pitches. Due to the increased heat dissipation area, the heat dissipation efficiency is good.
Improved cast radiator
This manufacturing method is an extension of the traditional casting method. First, the relatively thin embossed fin array is separated by partitions, and then fixed with a clamp, so that the bottom of the radiator is fixed to the bottom when the radiator is cast to form the radiator . This method eliminates the interface thermal resistance of the fins and the bottom material. This process can provide a high aspect ratio.
Forged radiators use a very high pressure percussion method to press metal materials into the mold to form the fins. The problem that may be encountered in the process is that the material will be blocked in the mold, making the height uneven, and hot forging is easier. Cold forging can produce denser and stronger fins. The advantages of forging methods include high strength, low surface roughness, and material uniformity. Forged radiators have a high aspect ratio.
Machined heat sink
Machining a heat sink is a way of machining to remove material from a metal block to form the shape of a fin. The common way is to use a set of cutting saws with a trolley-type gas stove on a CNC machine, with a precise distance between the saws to cut the fin geometry. Because it is easy to cause damage or curling of the fins during processing, secondary processing is required. The advantage is that it is easy to automate, and there is still room for use in the future.