Aluminum Bonded Fin Heat Sink is a high-performance air cooling solution designed for power electronics, thermoelectric modules, UPS systems, laser power supplies, traction drives, and other applications with demanding thermal management requirements. It combines an AL6063 aluminum base, individual bonded fins, and a copper heat pipe to provide an efficient thermal path from the heat source to the fin array.
Unlike an integrated extruded heat sink, the bonded fin structure allows the fin density, fin height, fin thickness, and fin spacing to be customized according to the required thermal resistance, heat load, airflow, and installation space. Thermal epoxy bonding, brazing, or soldering can be selected to achieve reliable fin-to-base attachment and stable heat transfer.
The heat sink uses an AL6063 aluminum base with individually manufactured fins installed into precision grooves. The aluminum construction offers a good balance between thermal conductivity, weight, corrosion resistance, and manufacturing cost.
Individual fin assembly also allows a higher fin density and aspect ratio than many conventional extrusion profiles, increasing the effective heat dissipation area within a compact footprint.
For applications with concentrated heat sources, a copper heat pipe can be integrated into the aluminum bonded fin heat sink. The heat pipe transfers heat rapidly from the heat source to the larger fin array, improving heat spreading and reducing localized hot spots.
The typical thermal path is:
Heat Source → Copper Heat Pipe → Aluminum Base → Bonded Fin Array → Airflow
This configuration is particularly suitable for high-power electronics where conventional passive heat spreading may not be sufficient.
Different bonding technologies can be selected according to operating temperature, thermal performance, mechanical strength, and production requirements:
Thermally conductive epoxy bonding
Brazing
Soldering
These processes are designed to provide reliable fin-to-base thermal contact while maintaining structural stability during long-term operation.
The performance of an aluminum bonded fin heat sink is influenced by several factors, including heat load, thermal resistance, ambient temperature, airflow rate, fin geometry, and thermal interface resistance.
The flexible bonded-fin structure allows engineers to optimize:
Fin density
Fin pitch
Fin height
Fin thickness
Fin aspect ratio
Base thickness
Heat pipe position
Airflow direction
Heat source location
For forced-air cooling, the fin spacing can be designed according to the available airflow and fan characteristics. Excessively narrow spacing may increase pressure drop, while wider spacing can reduce the available heat dissipation area. Therefore, fin geometry should be optimized according to the actual cooling system.
The AL6063 aluminum base is manufactured according to the customer's drawings. Depending on the design, the base can be extruded, die cast, or CNC machined.
Precision grooves are produced to accommodate the individual fins and ensure consistent fin positioning.
The fins are produced from thin aluminum or copper sheet stock through punching, cutting, or forming processes. Individual fins allow greater freedom in fin height, thickness, and spacing.
The fins are accurately inserted into the grooves and bonded to the aluminum base using the selected bonding process. Thermal epoxy, brazing, or soldering can be used depending on the required operating conditions.
Additional CNC machining can be performed for mounting holes, threaded holes, contact surfaces, and other precision features.
The finished heat sink can be cleaned and anodized to improve surface durability and corrosion resistance.
| Parameter | Specification |
|---|---|
| Product Type | Aluminum Bonded Fin Heat Sink |
| Base Material | AL6063 Aluminum |
| Heat Pipe | Copper |
| Manufacturing Process | Bonded Fin |
| Fin Bonding | Thermal Epoxy / Brazing / Soldering |
| Fin Type | Individual Bonded Fins |
| Base Process | Extrusion / Die Casting / CNC Machining |
| Fin Process | Punching / Sheet Cutting |
| Size | 489 × 390 × 49 mm or custom |
| Tolerance | Up to 0.01 mm |
| Surface Treatment | Cleaning + Anodizing |
| CNC Machining | Available |
| Quality Control | 100% Thermal Testing |
| OEM | Available |
| Packaging | Standard Export Packaging |
The bonded fin manufacturing process allows a high number of individual fins to be installed on the base, increasing the effective heat dissipation surface area.
Unlike some fixed extrusion profiles, bonded fins can be individually optimized for fin height, thickness, pitch, and orientation. This flexibility makes the design suitable for customized high-power heat sinks.
The integration of a copper heat pipe provides a rapid heat transfer path from localized heat sources to the larger aluminum fin array, helping improve temperature uniformity.
Bonded fin heat sinks can use a relatively simple grooved base structure. This can reduce tooling requirements compared with manufacturing complex one-piece fin profiles, particularly for customized designs.
The bonded fin structure provides greater flexibility for longer heat sinks and customized airflow configurations. This is useful for large industrial thermal management systems.
Used for heat dissipation in thermoelectric systems where effective heat spreading and controlled operating temperatures are required.
The heat sink can cool power semiconductor components inside uninterruptible power supplies (UPS) and help maintain stable operation.
High-power switching components in variable speed motor controls generate significant heat. Bonded fin heat sinks provide efficient forced-air cooling for these components.
The high-density fin structure provides a large heat dissipation area for power switching and rectification equipment.
Laser power supplies require stable thermal management to prevent excessive component temperatures. Copper heat pipe integration can improve heat spreading from concentrated heat sources.
Customized bonded fin heat sinks can be designed for traction drives and other high-power electrical systems where space, airflow, and thermal resistance must be considered simultaneously.
As a custom heat sink manufacturer, we provide OEM solutions based on customer drawings, 3D models, samples, or thermal requirements. The Aluminum Bonded Fin Heat Sink can be customized in terms of dimensions, fin geometry, bonding method, heat pipe configuration, mounting structure, and surface treatment.
For high-power applications, the design can be evaluated according to thermal resistance (°C/W or K/W), heat dissipation power (W), airflow (CFM), pressure drop, fin efficiency, and thermal interface resistance.
With CNC machining, anodizing, copper heat pipe integration, multiple fin bonding technologies, and 100% thermal testing, the solution can be engineered for reliable and efficient thermal management.
It is a heat sink consisting of an aluminum base and individually manufactured fins bonded into precision grooves. The fins can be attached using thermal epoxy, brazing, or soldering.
Bonded fins provide greater flexibility in fin density, fin height, fin thickness, and aspect ratio, making them suitable for applications requiring high thermal performance or customized dimensions.
Yes. Copper heat pipes can be integrated into the aluminum base to improve heat spreading from concentrated heat sources.
Yes. The size, fin configuration, heat pipe position, mounting holes, and other structural features can be customized according to the application.
The product can be cleaned and anodized. Other surface treatments can be evaluated according to the application requirements.
Kingka Tech Industrial Limited
We specialize in Heat Sink、Liquid Cold Plate、precision CNC machining and our products are widely used in telecommunication industry, aerospace, automotive, industrial control, power electronics, medical instruments, security electronics, LED lighting and multimedia consumption.
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Da Long New Village, Xie Gang Town, Dongguan City, Guangdong Province, China 523598
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