Folded Fin Heat Sink

Folded fin heat sinks represent a sophisticated approach to thermal management, designed to optimize heat dissipation in compact and high-performance systems. Unlike stamped or extruded heat sinks, folded fin designs involve bending thin metal sheets into a series of fins, creating a structure with exceptional surface area for cooling. These heat sinks are increasingly popular in electronics, renewable energy, and medical devices, where space efficiency and effective heat removal are paramount. Their unique construction offers a blend of lightweight design and robust thermal performance.

Aluminum rolled

Folding din machine during production

Folded fin heat sinks are commonly made from Aluminum (Al 1100), Copper (Cu1100), and Stainless Steel (SUS 304). Al 1100, with a thermal conductivity of 222 W/m·K and a density of 2.7 g/cm³, is lightweight, corrosion-resistant, and easy to form, making it cost-effective for general use. Cu1100, boasting a thermal conductivity of 401 W/m·K and a density of 8.96 g/cm³, excels in high-heat environments, though it's heavier and pricier. SUS 304, a stainless steel alloy, offers moderate thermal conductivity (16 W/m·K) but superior strength, durability, and resistance to harsh conditions, with a density of 8 g/cm³. Material selection depends on thermal needs, environmental factors, and structural requirements.

Folded fin heat sinks are available in a wide range of configurations, customized according to application requirements. The standard specifications include:

• Material: Al 1100, Cu 1100, or SUS 304
• Fin thickness: 0.08 mm – 1.2 mm
• Fin height: 3 mm – 80 mm
• Base thickness: 1.0mm – 10mm
• Surface treatment: Anodizing, nickel plating, chemical coating, or passivation (for SUS 304)
• Fin pitch: Customizable to optimize heat dissipation and airflow

All above specification just for reference and it can be change based on fin size, fin height ,fin gap, fin width etc...

• Power Electronics: Used in inverters, rectifiers, and power modules for superior heat management.
• LED Lighting: Ensures temperature stability in high-power LED applications.
• Telecommunication Equipment: Enhances cooling efficiency in network hardware and data centers.
• Aerospace and Defense: Applied in avionics and military electronics requiring reliable thermal control.
• Medical Devices: Supports precise cooling needs in imaging and diagnostic equipment.
• Automotive and EV Systems: Essential for battery management systems (BMS) and electric vehicle power modules.

The production process of folded fin heat sinks involves several precision-driven steps:

1. Material Selection: High-quality Al 1100, Cu 1100, or SUS 304 sheets are chosen based on the application requirements.
2. Fin Folding: Automated folding machines precisely shape metal sheets into fin structures, ensuring consistency and accuracy.
3. Fin Attachment: Fins are securely bonded to the base using thermal bonding, brazing, or soldering techniques.
4. Surface Treatment: Additional finishing processes such as anodizing, plating, or passivation are applied to enhance durability and corrosion resistance.
5. Quality Control: Each heat sink undergoes strict testing for thermal efficiency, mechanical strength, and dimensional accuracy.

Folded fin heat sinks provide an exceptional balance between performance, flexibility, and durability. Their ability to accommodate various materials and custom configurations makes them a top choice for industries requiring advanced cooling solutions.

 

PowerWinx is a leading expert in folded fin heat sinks technology, delivering innovative and efficient cooling solutions for electronics. Specializing in precision-crafted aluminum designs, PowerWinx excels in producing high-density, lightweight heat sinks for LEDs, power supplies, and more. Trust PowerWinx for professional, cost-effective folded fin heat sinks tailored to meet your thermal management needs with superior quality.

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