OPS CPU Heat Sink

Extrusion
Extrusion, the process of forcing hot metal billets through a steel die, is the most common way of making aluminum heat sinks. It is a fast, effective, and economic method for making heat sinks out of ductile materials like aluminum 1050. Extruded aluminum heat sinks are typically anodized before use.

Skiving
Skiving or scarfing, the process of cutting material into slices, is a common manufacturing process for the production of plate fin and flared fin heat sinks. The process allows for thinner and more closely packed fins than extrusion, and also provides a level or surface roughness, which slightly increases the total surface area.

Casting
Casting, the process of pouring molten metal into a mold, is another way to make heat sinks — aluminum or copper. Pressure die cast heat sinks can have a high level of complexity and offer excellent mechanical properties. Die casting is also sometimes used to make zinc heat sinks.

Milling
Milling, the subtractive process of cutting material from a blank workpiece, is an affordable way to make heat sinks with virtually any geometrical shape, from materials like aluminum alloys. Milled heat sinks (or machined heat sinks) may be more expensive than alternatives, especially in large quantities, but they can also be made very quickly.

3D Printing
Recent advancements in copper additive manufacturing have made 3D printed heat sinks a viable alternative to their traditional counterparts. Powder bed fusion and directed energy deposition technologies have been most successfully used for this purpose.