Double-sided milled fin heat sinks involve first milling fin-shaped teeth onto both the upper and lower surfaces of aluminum extrusions with tubes. Subsequently, PTC elements and conductive electrode sheets are wrapped in insulating paper and inserted into the through-holes of the milled fin heat sink (also known as a milled-fin heat sink or milled-fin radiator).
The protruding sections on both sides of the through-holes are then compressed to ensure the PTC element and electrode sheets are tightly bonded to the heat sink. This achieves optimal heat dissipation. Leveraging the unique positive temperature coefficient (PTC) characteristics of the core heating element, this design facilitates the full utilization of the heater's power output.
Advantages: The double-sided fin design enables an ultra-thin, high-density fin structure that maximizes thermal conductivity. It also accommodates various inner tube shapes and configurations, making it suitable for diverse PTC heating applications. The curved fin structure increases heat dissipation area, enhances airflow direction, and reduces aerodynamic drag. Furthermore, the one-piece molding eliminates heat loss from welding or brazing, lowers costs, and improves thermal performance.