Extruded Aluminium Heatsink

Extruded Aluminium Heatsink is a heat dissipation component manufactured using the aluminum extrusion process. Its core function is to utilize the high thermal conductivity of aluminum alloy to create products with structures such as fins and bases through extrusion, which absorb heat generated by electronic devices and quickly conduct and dissipate it, ultimately achieving device temperature control.

 

Application Scenarios

 

Computers and servers: CPUs, GPUs, and other processors generate a large amount of heat during high-performance computing. Extruded aluminum heat sinks increase the heat dissipation area through dense fin structures and achieve efficient cooling with natural convection or forced air cooling.

Network devices: Routers, switches, and data center servers need to operate stably for long periods. Extruded aluminum heatsinks, through customized design, meet the cooling requirements of high-power modules, ensuring the devices can work reliably in high-temperature environments.

Industrial Automation: Motor drives, inverters, PLCs, and other equipment in industrial environments need to withstand high loads and high temperatures. Extruded aluminum heat sinks enhance heat dissipation through corrosion-resistant surface treatment and complex fin structures, extending the lifespan of the equipment.

Communication Equipment: Base stations, RF modules, and other communication equipment need to operate outdoors for extended periods. Extruded aluminum heat sinks meet heat dissipation requirements through weather-resistant surface treatments and dust-proof designs, while modular design enables quick maintenance and upgrades.

一. Raw Material Inspection

1. Verification of Alloy Composition 

X-Ray Fluorescence (XRF) Analysis: Use high-precision equipment (such as Hitachi EA1400) to detect the content of elements like aluminum, silicon, and magnesium, ensuring compliance with the target alloy standards (for example, the Si content in 6063 aluminum alloy must be within the range of 0.2-0.6%). The test precision should reach RSD≤2%.

Metallographic Analysis: Observe the grain structure using an optical microscope to verify whether casting defects (such as porosity and segregation) are within acceptable limits (for example, according to ASTM E112, the grain size should be ≥ grade 5).

Hardness Testing: Use a Vickers hardness tester (HV) or Rockwell hardness tester (HRB) to measure material hardness. The hardness of 6063 aluminum alloy should be ≥ HV80 or HRB50.

2. Surface Quality Inspection

Visual and tactile inspection: Check for scratches, cracks, burrs, and other defects on the surface of extruded profiles. Surface roughness must be ≤ Ra 1.6 μm.

Ultrasonic testing: Inspect key structural components for internal defects, with crack depth not exceeding 0.5 mm.

3. Material Compliance Certification

Environmental Standards: Provide RoHS and REACH certifications to ensure that the content of harmful substances such as lead and cadmium is below the limit (e.g., lead ≤ 0.1%).

Material Certification: Require suppliers to provide material reports certified according to EN 10088-1 or ISO 17025.

二. Process Inspection

1. Extrusion Process Monitoring

Mold Precision Inspection: Use a Coordinate Measuring Machine (CMM) to verify mold dimensions, with key tolerances controlled within ±0.1mm.

Temperature and Pressure Recording: Monitor extrusion temperature (450-500℃) and pressure (80-120MPa) in real time to ensure process stability.

2. Surface Treatment Inspection

Anodized Coating Thickness: Measured using an eddy current thickness gauge (e.g., TT260). The standard requirement is ≥10 μm, and for outdoor applications, ≥20 μm.

Salt Spray Test: Conducted according to GB/T 10125 standard for neutral salt spray test, with no white rust formation within 96 hours (rating ≥ 9).

Adhesion Test: Coating adhesion is measured using the cross-cut method (ASTM D3359), and the rating must be ≥ 4B.

3. Dimensions and Geometric Tolerances

Profile measurement: Measure fin height, spacing, and other parameters using a profilometer, with tolerances required to be ≤ ±0.15mm.

Flatness measurement: Use a laser flatness meter to measure the flatness of the base, with an error requirement of ≤ 0.1mm/m.

三. Finished Product Performance Testing

1. Thermal Performance Verification

Thermal Resistance Testing:

Steady-State Method: Using the heat flow meter method (ASTM D5470), the thermal resistance is tested under standard conditions (ΔT=64.5℃), with a requirement of ≤0.1℃·cm²/W.

Transient Method: Using the T3Ster thermal resistance tester (JESD51-1 standard), thermal resistance and thermal capacitance are analyzed through real-time temperature response curves.

Thermal cycling test: Conduct 1000 cycles within the range of -40℃ to 125℃, with thermal resistance change required to be ≤15%.

2. Mechanical Reliability Testing:Vibration Test:

Conduct sweep vibration according to IEC 60068-2-6 standard at a frequency range of 10-2000Hz, with an acceleration of 5g, lasting 20 minutes per direction, without any structural looseness.

Drop Test: Free fall from a height of 1.5 meters onto a concrete floor, testing 3 times without cracks or deformation.

Pressure Test: Apply 1.5 times the operating pressure (≥1.2MPa) to the water-cooled radiator, maintain pressure for 3 minutes without leakage.

3. Environmental Adaptability

TestingSalt Spray Test: According to the AEC-Q200 standard, conduct a 96-hour salt spray test (5% NaCl solution) on automotive electronic radiators, with no corrosion spots.

Damp Heat Aging: Place in an environment of 85°C/85% RH for 1000 hours, with thermal resistance change ≤5% and insulation resistance ≥100MΩ.

四. Packaging and Shipping Inspection:

Visual Inspection: Ensure the surface is free of scratches and oxide film peeling, and that label information is complete (model, batch, production date).

Anti-Corrosion Packaging: Use moisture-proof bags and foam padding to ensure a salt spray protection level of ≥IP65 in a marine shipping environment.