The structure and processing of aluminum extrusion heat sink seems to be simple, but there are certain requirements in production, such as the first aluminum extrusion dosage of MOQ can not be less than 500kg, meaning that aluminum extrusion samples are usually dozens or even hundreds of units, so the amount of aluminum extrusion is large, and the processing quality is guaranteed? The answer is yes, because it is through the mold molding, it can be shown that the processing size of the product is close to the requirements of the drawing, and the tolerances allowed for aluminum extrusion profiles are relatively large and the processing size is larger and wider, relatively speaking, it reduces the risk of excessive processing size, and the size and flatness of the heat sink are more guaranteed after the machining of the heat sink. It also ensures the smoothness and brightness of the product, and aluminum extrusion heat sinks are widely used: heat sinks are used in computer circuit boards, industrial equipment circuit boards and other electronic products to meet the basic heat dissipation. We all know that electronic products are the representatives of science and technology in the 21st century, the market demand is large and quite various, to meet the needs of electronic components in all walks of life, the supply chain is strong and the product demand is stable, aluminum heat sink is also immediately produced a large demand, not only in the country, and even overseas are also welcomed.

Aluminum extrusion heat sink is melted at 660°C by aluminum extrusion die, heated to 450-500°C into the extrusion machine, extrusion molding in the die, usually the material is AL 6063 specifications, the material is hard, and the durability is longer, due to its high Cu content, so the conductivity is strong. The size of the copper content can directly affect the conductivity and the heat dissipation effect of the heat sink. In our design, the thickness of the fin sheet should be taken into account first. Generally speaking, the fin sheet is smaller than 0.5mm, and the mold is difficult to make.

So next we will explain how aluminum extrusion is processed, friction and dynamic balance, aluminum extrusion, is to control the size of the total friction force by controlling the effective distance of friction work, the acceleration of friction speed reduces the resistance, the relative discharge speed will be larger, but its accuracy will be reduced, in other words, it will be difficult to control the quality, Therefore, in the aluminum extrusion processing, it is necessary to take into account the friction resistance and the discharge speed to ensure a good balance, otherwise it will affect the uniformity and plasticity of the fin.

The stack series, the appearance looks like the same as the aluminum extrusion heat sink, but there is still a big difference in subtle observation.

Difference

Fin piece gap

I believe that people who are not too knowledgeable, it is difficult to distinguish the difference between the two, because both stacking and aluminum extrusion have Fin pieces, Fin pieces are the basis of the heat sink, and the stacked fin pieces will obviously have a zigzag shape and the fin pieces are twisted, but the aluminum extrusion fin pieces are vertical, and the spacing is generally wide, and the stacked heat sink material is also hard aluminum. AL 6061/Al 6063, the material also has a relative heat dissipation effect, because the composition contains Fe,Mg,Cu, si,S,P and other elements. The processing of the stacked heat sink is formed by the profile. After CNC processing, it can be superimposed by friction welding piece by piece. The second CNC processing ensures that the splicing gap of the product is small to 0.05-0.1mm 

Stack heat sink applications

This kind of heat sink is often used in machines that need heat dissipation on both sides, such as high-power laser machine, photoelectric laser cleaning equipment, from the appearance point of view, both sides are heat dissipation substrate, hollow heat sink in the middle, the heat of both sides through the heat dissipation substrate to the middle heat sink, heat dissipation. The stacked heat sink has the following advantages: increase the heat dissipation area and form a closed channel, so it has better heat dissipation performance, unlimited volume, high strength, low production cost, easy installation and maintenance, and long service life.