Precision cutting of heat sink fins machine machine increases product cost

Nowadays, the process of the heat sink fins machine machine includes several technologies such as cutting, extrusion, stamping, die-casting, etc., and more than a dozen specific manufacturing processes have been derived. In the process of forming the heat sink, in order to obtain some special , Fine shapes, all need to use cutting technology. Mainly used for sheet metal forming (bottom surface, fin formation), radiator slotting, engraving of special lines, etc.

The advantage of precision cutting is that the heat-absorbing bottom and the fins are integrally formed, the connection area (connection ratio) is large, there is no interface impedance, and the fins are thicker, which can more effectively use the heat dissipation surface area; in addition, the cut fins are densely arranged, A larger heat dissipation area can be obtained in a unit volume. However, this method is affected by raw materials, and the yield rate is low; the slenderness ratio is insufficient; the distance between the films is short, the air passage space is small, and the wind resistance is large. And the production equipment and production costs are very high. This method is not very common now, but many blade servers use heat sinks of this specification.

Aluminum die casting is a widely used single aluminum alloy processing technology. After the aluminum alloy ingot is melted into a liquid state, it is filled into the mold, and then die-casted by a die-casting machine at one time. After cooling and subsequent processing, a single heat sink fins machine is made.

The advantages of aluminum die-casting are: it is integrally formed without interface impedance; it can manufacture thin, dense or complex fins, which is easy to realize some special designs. Its significant shortcomings: the material's mechanical properties and thermal conductivity cannot be balanced; excessive surface flow and oxidized slag during die-casting will reduce the heat transfer effect; internal micro-shrinkage holes are higher during cooling, and the actual thermal conductivity is reduced; mold life is shorter, and equipment Relatively complex, with small output and slightly higher cost. In fact, most of the aluminum heat sink fins machines of this kind of process, the heat dissipation effect is still said in the past, the products manufactured have a certain cost performance.