Die Cast Heatsink

Advantages of Heatsink

High degree of freedom for complex geometric shapes:

Die casting technology can precisely form complex structures such as internal cavities, irregular-shaped fins, curved surface substrates, integrated installation columns/screw holes, etc., breaking through the cross-sectional limitations of traditional aluminum extrusion profiles.
Realizing bionic heat dissipation structure, optimizing directional airflow channels, and achieving precise chip-level bonding significantly enhances heat dissipation efficiency.
Reduce or even eliminate secondary processing (such as CNC milling), lower costs and shorten delivery times.

Excellent mechanical strength and rigidity

Die-cast aluminum alloys (such as ADC12, A380) offer higher structural strength and rigidity, making them particularly suitable for large-sized heat sinks or applications that need to withstand vibration/shock (such as automotive and industrial control).
Integrated structure design avoids thermal interface problems caused by assembly.

High thermal conductivity and lightweight

Select high thermal conductivity die-cast aluminum alloy (specify the model, such as thermal conductivity ≥96 W/mK), to achieve lightweight design while ensuring heat dissipation performance.
By optimizing the wall thickness and fin design, the best balance between heat dissipation performance and weight is achieved.

The economy and consistency of mass production

Die casting is particularly suitable for mass production, and the cost per piece significantly decreases as output increases.
Molds ensure high consistency of products and meet the requirements of automated assembly.

Good adaptability to surface treatment

The surface of die-castings is dense and suitable for various surface treatments such as anodizing, sandblasting, painting, and electrophoresis, which enhance the appearance, corrosion resistance, and radiation heat dissipation capacity.

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Aluminum Die Cast Heatsink
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Necessity and core advantages

Die-casting technology has significant necessity and advantages in the production of heat dissipation parts (such as heat sinks and heat sinks) in many application scenarios：

The only solution for complex geometric forming

The only one capable of efficiently, precisely and in large quantities manufacturing ultra-thin high-density fins, complex three-dimensional surfaces and integrated structures that traditional processes (such as machining and extrusion) cannot achieve.

Large-scale production cost crushing

After the mold is put into production, it has an extremely low unit cost (far lower than machining/sheet metal welding) and a production speed of seconds, making it the economic first choice in the face of massive demand.

Comprehensive balance of material performance

Mainstream high thermal conductivity die-cast aluminum alloys achieve the best practical balance among thermal conductivity, lightweight, strength, corrosion resistance and cost.

Highly integrated design freedom

It can seamlessly integrate the heat dissipation body, installation structure, cavity, bracket and other functions at one time, simplifying assembly and enhancing reliability.

Applications Of Die Cast Heat Sinks

Die-Cast Heat Sinks Find Applications In Various Industries, Including:

LED Lighting (High Power/COB)

Provide complex integrated structures for high-power LED modules and COB light sources, achieve precise heat dissipation at the chip level, and ensure luminous efficiency and long lifespan.

Power Supply (Server/Switching)

Meet the high-density and high-reliability heat dissipation requirements of server power supplies and high-power switching power supplies, optimize the air duct design, and ensure the stable operation of the system.

Automotive Electronics (EV/ADAS)

Adapting to the harsh on-board environment (vibration, temperature shock), it provides high-strength and lightweight cooling solutions for motor controllers, OBC, BMS, lidar, etc.

Telecom Equipment (5G RRU/BBU)

Addressing the heat dissipation challenges of 5G high-power-density chips, providing customized solutions with high thermal conductivity and low thermal resistance.

New Energy (Solar Inverter/Charger)

Suitable for high-power heat dissipation of photovoltaic inverters and charging pile modules, optimizing structural strength and thermal performance.

FAQ

Q: How does a heat sink works?

A: A heat sink is a component that increases the heat flow away from a hot device. It accomplishes this task by increasing the device's working surface area and the amount of low-temperature fluid that moves across its enlarged surface area.

Q: How are metal heat sinks made?

A: Extrusion, the process of forcing hot metal billets through a steel die, is the most common way of making aluminum heat sinks. It is a fast, effective, and economic method for making heat sinks out of ductile materials like aluminum 1050. Extruded aluminum heat sinks are typically anodized before use.

Q: Which factor plays an important role in heat sink design?

A: Some of the key factors that should be considered in heat sink design include thermal resistance, material, fin configuration, fin size and shape, fin efficiency, heat sink attachment method, and thermal interface material.

Q: What are the two types of heat sink?

A: A heat sink thus transfers the heat from the high temperature component such as a transistor to the low-temperature medium such as air, oil, water or any other suitable medium through conduction and then convection. There are two types of heat sinks, namely the passive heat sink and the active heat sink.

Q: What is the boundary layer of a heat sink?

A: The Boundary Layer is a thin layer of fluid created along surfaces as fluid moves across it. Every surface, from your hand, to the surface of a heat sink used to cool electronic devices, is surrounded by a boundary layer.

Q: What is the thermal resistance of a heat sink?

A: Commercial extruded aluminium heat sinks have a thermal resistance (heat sink to ambient air) ranging from 0.4 °C/W for a large sink meant for TO-3 devices, up to as high as 85 °C/W for a clip-on heat sink for a TO-92 small plastic case.

Q: What is heat source vs heat sink?

A: A heat source is a system from which heat is 'lost' to a heat sink. For example, in the built environment, a radiator may be considered to be a heat source, whilst the space around it, which it heats by a process of radiation and convection, might be considered to be a heat sink.

Q: What materials are commonly used to manufacture die-cast heat sinks?

A: Die-cast heat sinks are often crafted from materials with high thermal conductivity, with aluminum being the most common choice due to its lightweight nature and excellent heat dissipation properties.

Q: How do die-cast heat sinks contribute to energy efficiency?

A: By efficiently dissipating heat and preventing devices from overheating, die-cast heat sinks contribute to improved energy efficiency and performance longevity.

Q: Can die-cast heat sinks be customized for specific applications?

A: Absolutely! Die-cast heat sinks are highly versatile and can be tailored to meet the unique cooling requirements of various applications, making them a go-to choice for diverse industries.

Q: How do die-cast heat sinks support sustainable manufacturing?

A: Manufacturers are exploring sustainable materials and eco-friendly processes to create die-cast heat sinks that minimize environmental impact, aligning with global sustainability goals.

Q: What are the advantages of using a Dia Cast Heatsink?

A: Some advantages of using a Dia Cast Heatsink include its lightweight design, excellent thermal conductivity, and cost-effectiveness. It also provides good electromagnetic shielding and can be easily customized.

Q: How are Dia Cast Heatsinks manufactured?

A: Dia Cast Heatsinks are manufactured using a process called die casting. In this process, molten aluminum is injected into a mold under high pressure, allowing for complex shapes and intricate designs.

Q: What is the difference between passive and active Dia Cast Heatsinks?

A: Passive Dia Cast Heatsinks rely on natural convection to dissipate heat, while active Dia Cast Heatsinks have built-in fans for forced-air cooling. Active heatsinks are generally used in applications with higher heat dissipation requirements.

Q: How to choose heatsink for MOSFET?

A: Before selecting a heat sink for power MOSFET, some basic calculations must be made. The first step to selecting a heat sink is calculating the total power dissipation of the components in the circuit application. Power dissipation can be determined from circuit calculations or from efficiency measurements.

Q: How can I improve my heatsink?

A: A heat sink design can be improved by adding fans or pins, choosing an alternative material, or adding in forced cooling via convection. A heat sink works by absorbing thermal energy in the surrounding environment from electrical component inefficiency via the conduction method of heat transfer.

Q: What is surface treatment for heatsink?

A: The surface treatment for heatsinks that are made out of copper is frequently plated with alloys such as gold, silver and other metals because of their ability to combat deterioration and increase the overall conductivity of the device.

Q: Do heatsinks need thermal paste?

A: Every CPU cooler needs thermal paste, but many have it pre-applied, which simplifies the installation process. To find out if you have pre-applied paste, check the bottom of the base plate or water block of your CPU cooler that attaches to the CPU.

Q: What surface roughness for heatsink?

A: A mounting surface flatness of 0.001 in/in is generally required for satisfactory contact between the electronic device and the heat sink or cold plate. The surface roughness should be equivalent to that of the electronic device, where 32-64 µin is usually adequate.

Q: How do you measure the temperature of a heat sink?

A: A small hole is drilled into the middle of the heat sink base and a thermocouple is placed inside of it to measure the base temperature of the heat sink. One thermocouple each is placed on the top and bottom of the polycarbonate insulator.

As one of the leading dia cast heatsink manufacturers and suppliers in China, we warmly welcome you to buy cheap dia cast heatsink from our factory. All customized products are with high quality and competitive price.

Crank Case Sensor, Aluminum Cover, Quadrate Heatsink