Die Cast Heat Sink


Nowadays, heat sink is one of the most popular methods in heat management. Heat sink, as the name suggests, helps electronic components to dissipate heat from them, increase their performance and longevity. Although the market offers various manufacturing processes, but die casting is known to be a preferred method for the production of high-quality heat sinks.

In China, various companies are offering quality heat sinks. CFS Foundry, a die casting company, has gained popularity because of its credibility, high-end products, and time management.

Die Cast Heat SinksOur company has years of experience in manufacturing die cast heat sinks. The best part of our manufacturing is that we have merged the ancient technique with the advanced technology hence resulting in fine quality products. CFS Foundry not only delivers specific heat sinks but also works with their clients, so we can deliver products as per the need of the diverse industry requirements.

Below is a guide which will help you get insights of the manufacturing process of die cast heat sinks. Moreover, in this guide you will also get to know about material options, and other related processes that makes CFS Foundry a go-to manufacturer for die cast heat sinks.

What is a Heat Sink?

What is A Heat Sink
As we know, when electronic devices like CPUs, GPUs, and transistors work, they generate a huge amount of heat. To regulate that heat and keep the device, a heat sink is used whose main purpose is to cool down the device by dissipating heat generated from electronic components.

Heat sinks control overheating, otherwise it could lead to reduced performance, component failure, or even permanent damage. Common uses of Heat sinks are in computers, LED lighting, automotive systems, and other industrial applications.

The design of a heat sink depends on a base and fins, which increase the surface area that helps in heat dissipation. The base is attached to the heat source, while the fins extend outward to transfer heat into the surrounding air.

Although heat sinks are very efficient, their efficiency depends upon different factors, such as its manufacturing process, design, and material.

Die Casting Manufacturing Process for Heat Sinks
Die Casting Manufacturing Process for Heat Sinks

  1. Design and Mold Preparation

Designing the heat sink and creating a mold is the first step. These molds are made of hardened steel, so it can bear high temperatures. However, it is necessary to keep in mind the thermal performance, manufacturability and mechanical strength of the heat sink while designing the mold.

  1. MeltingThe Metal

Now you have the mold, the next step is to select the metal, we usually prefer aluminum or zinc. After metal selection, it is placed in the furnace for melting. Aluminum melts at approximately 660°C, while zinc melts at around 419°C. Managing temperature during the melting process results in quality and consistency of the molten metal.

  1. Injection

This process takes place under high pressure, as it ensures a uniform spread of the molten metal in each corner of the mold. A pressure between 1,500 and 25,000 psi is good to inject the molten metal into the mold.

  1. Cooling

The mold is then cooled so that the metal cools, and once solid, the shaped metal part is removed from the mold. This cooling time depends on the size and complexity of the heat sink and generally takes a few seconds to a minute. The benefits of proper cooling becomed apparent during testing of desired mechanical properties and dimensional accuracy.

  1. Ejection

After the metal has cooled and solidified, the mold is opened, and the finished heat sink is ejected. This step is automated using systems or is done physically based on the production scale. The removed heatsink might have some excess material, called flash, that will have to be cut away in the next step.

  1. Trimming and Finishing

The heat sink ejected is then trimmed to remove any flash. Finishing operations including machining, polishing sandblasting, or coating may be used to obtain an appropriate surface quality and appearance. These finishing details further optimize the heatsink and also help increase its aesthetic appeal.

Die Casting vs. Other Processes for Heat Sinks 

Die casting is one of the common methods to produce heat sinks. Besides, there are also some other methods that can be used in the manufacturing of heat sinks.


Extrusion is a process in which materials are forced through a shaped die, so it can create long, continuous profiles to be cut to length. This process is highly suitable when there is a need for high production. Moreover, it also allows high thermal conductivity. The process is great but it is nor suitable for creating complex shapes with defined geometries. However, die casting can create complex geometries.


In this process, the excess material from a solid block is removed with the help of a machine to obtain the desired shape. Although the process gives high end products, yet it is time consuming and expensive compared to die casting. Moreover, we can’t use this method for large-scale production.


As the name suggests, stamping process uses press to create metal sheets into the specific shapes. The process is good for low scale production and can create simple designs. Hence it is cost effective, yet not as good as die casting, as it can’t work with complex designs.


Forging is a modern method, and in this process, the metals are shaped with the help of comprehensive localized forces. Although the products of this process are strong and durable, this process also doesn’t work with complex designs like die casting.

Material Options for Die Cast Heat Sinks

Material Options for Die Cast Heat Sinks

Die Cast Aluminum

Aluminum die casting is an increasingly popular choice for heat sinks due to good functional properties, such as light weight, corrosion resistance and good thermal conductivity. Such properties makes aluminum a very good material to remove heat from electronic components, and there by enhance their performance and reliability. Aluminum is lightweight which makes is a good candidate for places that needs weight saving such as aerospace and automotive industries. And due to the fact that aluminum also has natural corrosion resistance, a premium aluminum pedestrian bridge will last for decades and will able to withstand harsh conditions in nature. This material is also castable and machinable, which means it can produce complex shapes and consistent patterns to meet particular thermal and mechanical guides. The aluminum, aside from its versatility and mechanical characteristics allows its utilization in a big array of application from consumer electronics to industrial machinery. CFS Foundry has rich experience in producing die cast aluminum heat sinks, we well know the key factors that may affect the quality of parts, and can avoid the quality issues effectively during production process.

Die Cast Zinc

Another choice for die cast heat sinks is zinc, with its own set of benefits. Effective heat dissipation is obviously essential, so we chose zinc, which offers decent thermal conductivity. Due to its high precision-to-size ratio and superb mechanical properties, zinc serves as an excellent material for complex heat sinks in need of tight geometrical tolerances. Thin walls are able to be cast in zinc, thus allowing for new and more compact heat sink designs. Zinc also provides high resistance to impact whereas still being a strong and powerful metal and it is viable for components that require durability. In addition, zinc has a lower melting temperature than aluminium, thereby saving energy during casting which means, more cost savings. This makes zinc an appealing material for a number of heat sink applications, especially where intricate forms and exact dimensions are essential.

Aluminum vs. Zinc for Die Cast Heat Sinks: How to Select?

If you are confused about how to choose between aluminum and zinc for die cast heat sinks. Please consider the features below:

Thermal Conductivity

For thermal conductivity, although it is good in both aluminum and zinc, aluminum has higher thermal conductivity than zinc, making it good for this purpose.


Aluminum is also lighter than zinc, which can be beneficial in applications where weight is an important consideration, like the aerospace and automotive industries.


Budget control is very important. So if your budget is low, you may choose zinc instead of aluminum, as it is cheaper than the latter.

Design Complexity

Zinc is more variable and can work with thin walls and complex designs compared to aluminum. So, it could be a good choice in areas where high precision is required.

Corrosion Resistance

Both aluminum and zinc are good corrosion resistant. However, aluminum can show better corrosion resistance in harsh conditions.

Advantages of  Die Casting for Heat Sinks 

Die casting is a preferred choice for manufacturing heat sinks, because it offers various benefits. Below are the 5 benefits you will get when using the die casting process for heat sinks.

High Precision and Consistency

With the process of die casting, we can make designs with complex geometries and close tolerances. This will result in the production of high precision, reliable, and durable products in large volumes.

Cost-Effective Production

This process is automated and doesn’t require manual labor to produce larger volume, which reduces its overall costs. Moreover, the final product doesn’t necessarily require extra finishing which makes it more cost-effective.

Material Efficiency

The excess materials in the die casting process can be reused, which not only makes it cost effective, but also environmentally friendly.

Superior Surface Finish

With die casting, you don’t need extra surface finishing, as it produces parts with smoother finishing compared to other methods, which reduces its costs and saves time.

Design Flexibility

Other methods don’t support the manufacturing of complex and intricate designs, whereas die casting not only works with complex designs but also helps in the production of thin walled designs.

Design Tips for Die Cast Heat Sinks

Design Tips for Die Cast Heat SinksDesigning die cast heat sinks that work perfectly isn’t easy, and it needs a deep consideration of different features to produce highly precise products. Below you will find some tips to design a perfect die cast heat sink:

Increased Surface Area 

Heat dispersion can be increased by adding fins and extra surface. The greater the surface area the more heat will be dispersed.

Optimize Fin Spacing

The space between the fins is also important, so proper and balanced spacing between the fins enhances airflow, cooling efficiency, and maximizes surface area.

Minimize Thermal Resistance

Use of less materials and thin walls between the cooling fins and heat source makes the heat sink a well designed model with improved heat transfer.

Consider Manufacturing Constraints

Before designing, you need to keep in mind to avoid extra complex designs and shapes. Efficient die casting techniques will result in the production of high quality heat sinks.

Mounting Features Incorporation

Mounting holes and clips incorporation not only helps in simplifying the installation, but also results in secure attachment with electronic components.

High-Conductivity Materials Usage 

High thermal conductivity materials like aluminum and zinc can be used to increase heat dispersion. These materials offer excellent thermal performance.

Surface Finishes Application

If you want a perfect shine, precision, and increased thermal performance then you can anodize, paint, or coat the heat sink.

Thermal Simulation and Testing

You can also use thermal simulation software to predict any fault in the heat sink’s performance. Identifying the potential issues before the production can result in fine design with perfect thermal management.

If you follow the tips mentioned above, you can create die cast heat sinks that show great thermal performance and are reliable.

Applications of Die Cast Heat Sinks

Applications of Die Cast Heat SinksDie cast heat sinks can be used in a variety of industries, which are mentioned below:

Consumer Electronics

Heat sinks are helpful in consumer electronics, as they assist devices like CPUs and GPUs to disperse the heat evenly. So, the devices can perform efficiently at optimal temperatures.

LED Lighting

High-power LEDs generate a huge amount of heat, so die cast heat sinks are important to be placed in LED lighting fixtures so it can manage the heat. It is also helpful in structural support.

Automotive Electronics

Automotive industry is widely using die cast heat sinks in their automotive electronic control units (ECUs). They are helpful in maintaining the thermal load that is emitting from the electronics.

Telecommunication Equipment

Server and data center are important in telecommunication and die cast heat sinks help them to cool down and maintain temperature. They are also helpful in preventing overheating.

Industrial Machinery

Industrial machines are heavy and usually they start in harsh conditions while generating maximum heat. Die cast heat sinks in industries are used to dissipate the heat and help in maintaining the efficiency and reliability of the machinery.

Medical Devices

In the medical field, die cast heat sinks can be used in advanced medical machinery, such as diagnostic instruments and imaging equipment, to maintain the heat during operation.

CFS Foundry – Your Partner for Die Casting Heat Sinks

Die Cast Heat Sink Manufacturer in ChinaCFS Foundry has gained its reputation by producing high-quality die cast heat sinks. We combine the latest die casting technology with skilled professionals to deliver high-class thermal management solutions.

We do not compromise on quality and always deliver our products accurately and consistently. We also serve a range of industries including consumer electronics, automotive and medical technology.

Why should you choose CFS Foundry for Die Casting?

CFS Foundry assures you to deliver the exact product you are looking for, because we understand your needs, priorities, and specific requirements. We have experienced staff to understand your requirements, guide you towards the best choices, and produce custom heat sinks that will maximize the thermal performance of your device.

Moreover, we always work with high quality materials such as aluminum and zinc to enhance the reliability and longevity of your electronic components.

If you are seeking reliable and efficient thermal management solutions for your electronic components, pls feel free to reach us. We deliver precise, guaranteed, and fine quality die cast heat sinks. No matter what you need, we are here to custom-design heat sinks. Contact us today to discuss your project and learn how we can help you achieve optimal thermal management.


Die cast heat sinks are necessary in modern electronic devices, they offer thermal management solutions for various applications. You will benefit with the die casting process in numerous advantages because they offer high precision, cost-effectiveness, and can produce complex geometries.

CFS Foundry is a leading die casting company in China. With both hot chamber die casting and cold chamber die casting capabilities, we are dedicated to manufacture high-quality heat sinks that meet maximum performance and your design requirements. We understand the intricacies of die casting, material options, and design considerations and depending on that we offer customized thermal management solutions.

Frequently Asked Questions (FAQs)

1. What is the typical lead time for CFS Foundry to die cast heat sinks?

Depending on the complexity of designs, order size and type, it takes different time frames for CFS Foundry to produce die cast heat sinks. It usually takes from 4-6 weeks. Though punctuality in delivery ensures good quality services all through.

2. Can CFS Foundry produce custom heat sinks?

CFS Foundry is capable of producing custom-made heat sinks that meet specific design parameters as well as overall performance. Our company works closely with our customers in creating customized solutions to suit their unique applications.

3. What quality control measures does CFS Foundry implement for its die cast heat sinks?

CFS Foundry has a very strict method of maintaining quality throughout the production process of its die casted heat sinks. These include inspections, performance testing and adherence to relevant industry standards that guarantee each piece meets optimal levels of reliability and quality.

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