Custom Aluminum Heat Sinks Tin Plating

1. Efficient Heat Dissipation: Custom Aluminum Heat Sinks Tin Plating utilizes a highly thermally conductive aluminum alloy base, combined with a strategically designed metal plate, to efficiently transfer heat from the chip/module to the air, reducing device temperatures and extending device life.

2. Solderability: The tin plating enhances wettability on critical connection surfaces, ensuring strong solder joints and minimizing rework, significantly improving production efficiency. The tin layer provides a protective film on the aluminum surface, making it more durable than bare aluminum in humid or mildly corrosive environments, providing enhanced corrosion and electric shock protection.

3. Cost Control: Compared to copper heat sinks, the aluminum + tin combination is lighter and less expensive to manufacture for the same volume.

4. Small/Large Quantity Support: We can produce according to drawings or samples for both prototypes and mass production, supporting processing, modification, and proofing services.

1. Density and Thickness: The appropriate metal sheet spacing and thickness can be selected based on power consumption and air-cooling/self-cooling conditions. For fan-forced convection, denser metal sheets can be used to increase heat transfer area; for natural convection, the spacing should be maintained to prevent air stagnation.

2. Base Flatness: The base of custom aluminum heat sinks must be sufficiently smooth to ensure good contact with the device. If required, surface grinding or tinning can be performed before application of thermal adhesive or soldering.

3. Fixing and Installation: Heat sinks generally have positioning holes, side ears, or guide rails to facilitate direct assembly to a PCB or chassis.

1. Extrusion/CNC Molding: Depending on the structure, choose extrusion molding (high production volume, low cost) or CNC machining (complex shapes, high precision).

2. Degreasing and Activation: After molding, the aluminum parts should be degreased and pickled or alkali-washed to remove the oxide film and improve the adhesion of subsequent coatings.

3. Tinning: Electroplating or chemical plating creates a uniform tin layer on the aluminum surface, improving weldability and protective properties.

4. Surface Inspection: Checks the coating consistency, weldability, and appearance quality. If necessary, secondary treatment is performed to meet customer requirements.

1. Incoming Material Inspection: Confirms the aluminum grade and chemical composition.

2. In-Process Inspection: In-line inspection of key dimensions, hole positions, and fin straightness.

3. Surface Inspection: Tests the coating appearance, adhesion, and thickness.

Common Applications: Heat sinks for LED lamps and modules; heat sinks for switching power supplies and power modules; communications equipment and base station power amplifiers; automotive electronics (not in high-temperature chambers) and industrial control modules.

Packaging and After-Sales Service: Packaging is shockproof and moisture-proofed according to export standards, and customer-specified labeling and packing list formats are supported. We provide sample inspection, sample creation based on custom drawings and samples, and necessary technical support. Quality issues are handled according to contract terms, and returns or replacements are supported (specific details are subject to contractual agreement).

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