Extruded aluminum heatsinks are the most common heat sinks used for thermal management today. They are manufactured by pushing hot aluminum billets through a steel mold to produce the final shape. The most common aluminum alloy is 6063-T5, but other 6XXX aluminum alloys can also be examined as needed. When the material is extruded, the initial sticks are 30-40 feet and length and are very soft. The aluminum material is stretched by grabbing both ends to produce a straight stick. After the stretching, the aluminum material can be either air or over aged depending upon the required final hardness of the material. After aging process, the extruded aluminum enclosure is cut to the final length and any final fabrication (holes, pockets, or other secondary machining) can be done. Extruded aluminum heatsink is usually supplied with a “finish”, such as anodizing, which can enhance its thermal performance. The heat sink can also be supplied with a chromate finish, which provides some corrosion protection, or can be used as a primer before a final paint or powder coating is applied. While each extruded shape is unique to the requirements that it was designed for, extruded aluminum heatsinks are the most cost-effective cooling solution. Each shape is engineered to achieve the optimal thermal and structural performance. Lori is the good aluminum heat sink suppliers in china,our lori partners with a large list of vendors which insures that you have the best thermal solution based on your system structure and thermal requirements.