extruded heat sink

Extruded Heat Sink

  • Thousands available molds for your alternative
  • Stock aboudant extruded heat sink with Standard size
  • One-stop Aluminum Fabrication save your whole cost
  • Customized your own design with our latest Tooling Technology

Your Premier Extruded Heat Sink Manufacturer

SGS & ISO Audited
Wellste, a professional extruded heat sink supplier, has been approved by SGS, and obtain ISO quality system certification, ISO environmental management system certification.
0% Quality Complaint
Wellste has advanced in-house quality testing lab, 48+ QC inspection team, 100% inspected extruded heat sink before each shipment, Guarantee the product quality and eliminate your concerns.
Manufacture Test Certificate
We will issue testing certificate each order before shipment. Make sure extruded heat sink to meet chemical composition standard and achieve mechanical performance standard.
Fast Delivery
Wellste keeps stable delivery time 25 days or less. Even in peak season, we can catch the delivery time. There will be no delay.

Your Premier Extruded Heat Sink Manufacturer

Wellste extruded heat sink also named as heat sink extrusion is at a high Precision Quality level, that guarantee by 30 engineers 10- Year Aluminum industry working experience. We own thousands of available standard mold, We can fast matching which Extruded Heatsink reach 90% similar to yours, which can save your money and time for heat sink extrusion tool.

Wellste stock a variety of extruded heat sink with Standard size. This can reduce your MOQ to 100KG only, furthermore, also can speed up lead time and ship out within 5 days.  Contact our sales engineer for searching the request size for you.

Wellste is specialized in manufacturing extruded heat sink. We supply a large number of extruded heat sink to customers in different industries. We provide one-stop Aluminum Fabrication, such as CNC/Punching/Tapping/Welding/Drilling/Milling. This can help save your time and lower cost. As an extruded heat sink manufacturer and supplier, Wellste Aluminum will meet you any demand.

Let’s Support Your Bussiness and Reduce Cost For You

Wellste can custom your Aluminum Extrusions , Also can design your own Products, Even If idea ONLY.

-Standard Packing Option-

* Long bar length profiles 3.0-6.0 meters*
* Short bar length profiles 0.3-3.0 meters*

-Loading & Shipment-

Wellste: Your Leading Extruded Heat Sink Supplier

Wellsteextruded heat sink is made from aluminum alloy 6063. Why Aluminum instead of Copper? The thermal conductivity of pure copper is about 380~400W/m·K, while for pure aluminum is about 230W/m·K, not to mention aluminum alloy, which is about 120~200W/m·K.

It is obvious that copper has much better thermal conductivity than aluminum. But the density of copper is 3.3 times more than aluminum, and more expensive. So considering these factors, aluminum is more suitable on light-weight and cost-effective for extruded heat sink.

Wellste extruded heat sink is most commonly anodized, commonly Silver natural Heatsink and Black anodized Heatsinks is most popular choose in Electronic industry. The anodized heatsink extrusions has better corrosion resistance, wear resistance and electrical isolation. If cosmetics are important, then Electrophoresis coating should be considered. Both of them have advanced thermal solutions.

Wellste extruded heat sink are widely used in a variety of industries, including architecture, information technology, consumer, medical, LED lighting and power conversion etc. Aluminum heat sink enclosure is suitable to be used as power heatsink amplifier, power supply, and industrial controls etc.

Electronic extruded heat sinks are used in electronic devices like PCB board to prevent overheating. Round heat sinks extrusion is often used as led heat sink. Small heat sinks are used in computer memory, chipset cooling fan and CPU etc.

Wellsteare able to customize big heat sinks with width 15.7’’~17.7’’, and we can refund the extrusion tooling fee if the order reaches specific quantities. Therefore, Wellste can supply you with extruded heat sinks with outstanding quality and save production procedure cost for you.

No, any excuse, contact wellste sales engineer and get a fast quote today.

Extruded Heat Sink- The Ultimate FAQ Guide

Heat sinks are an indispensable part of electrical and electronic devices and equipment. Heat sinks absorb the heat from devices and release it in the air or fluid. You will find heat sinks in-

  • Computers
  • PCBs
  • Refrigerators
  • DVD players and other devices

Extruded heat sinks are the most common types of heat sinks in use. They are affordable and offer a good thermal management. Extruded heat sinks can be of many types and configurations. Today we are presenting this helpful guide to answer all your questions on heat sinks.

By the end of this guide, you will know all about extruded heat sinks. The information will help you make an informed decision about your project needs. You will also be able to choose the right extruded heat sink without any confusion.

So let’s start with our guide without any more delay!

What is the best material for extruded heat sinks?

Extruded heat sinks can be made from materials like copper or aluminum. Copper has improved thermal conductivity than aluminum though it costs and weighs more. Copper is usually reserved for applications that need higher thermal conductivity.

Aluminum is most commonly used for extruded heat sinks. Aluminum is cheaper and lightweight compared to copper. The material also has relatively good thermal conductivity. So it is useful for a wide range of applications.

The best material for extruded heat sinks will be determined by your needs. You should also consider your project applications.

What is the difference between passive and active extruded heat sink?

Extruded heat sinks can be of two types- active or passive extruded heat sinks.

Passive extruded heat sinks don’t have any mechanical components. They cool your device through the process of convection. The heat is dissipated into the air as air flows across the fins of the heat sink. Passive heat sinks are more reliable as they don’t come with any moving parts.

Active extruded heat sinks have a mechanical component to assist the cooling process. You can find blowers or fans on active heat sinks. They cool more efficiently than passive heat sinks but are more expensive.

Active heat sink with fan

Active heat sink with fan. – Photo courtesy  Wikimedia Commons

Which aluminum alloy is suitable for extruded heat sinks?

Aluminum is the most common material used for extruded heat sinks. You can find heat sinks made from different aluminum alloys. The most common alloys used include 6000 aluminum series. They are durable and affordable too. Aluminum 6000 series can have a thermal conductivity of 166 to 201 (W/m•K).

You can also use aluminum 1050 alloy with a thermal conductivity of 229 (W/m•K). But the alloy may not be suitable for all applications as it is mechanically very soft. While choosing alloys, be sure to consider other factors and not only thermal conductivity.

Does using custom colors impact heat sink performance?

Sometimes extruded heat sinks are given various colors like green, blue or black. But color doesn’t have any relationship with the performance of the heat sink. The difference is merely a visual one. It doesn’t affect how fast or slow your device is cooled.

It’s also important not to paint or powder coat your heat sinks. Coatings form a layer over the heat sink and take the role of an insulator. That will prevent them from dissipating heat effectively.

What are the benefits of anodized extruded heat sinks?

Anodization is a type of electrochemical process. Heats sinks are anodized by the process of aluminum extrusion. The process makes the natural oxide on aluminum thicker. No powder or chemical is put on the surface of the aluminum like other methods.

Anodization provides a number of benefits for heat sinks. The thick oxide layer strengthens the heat sink. As a result, it can prevent corrosion much better. The strong layer also provides strength. The heat sink can withstand wear and tear better. You can also use it ideally in harsh conditions.

Anodization increases the electrical isolation of the heat sink. You can also enjoy improved surface emissivity. The heat transfer also becomes effective, especially for smaller heat sinks.

Here’s how an anodized heat sink looks-

 

How does aspect ratio impact the performance of extruded heat sinks?

Heat sinks can have different aspect ratios. A heat sink’s aspect ratio is the comparison between-

  • The fin height
  • The distance between the fins

Heat sinks generally come in aspect ratios of 3:1 and 5:1. A heat sink with high aspect ratio will have either-

  • A greater density of fins in a specific footprint,
  • Tall fins compared to heat sinks with less aspect ratio

High aspect ratio heat sinks offer more area for dissipating heat. Wellste has powerful manufacturing capable to product high aspect ratio more than 15:1.

That means the heat sinks are more effective in cooling the equipment. Extruded heat sinks with high aspect ratios also take up less space. So they are ideal for applications where space is limited.

What is the difference between bidirectional or omnidirectional extruded heat sinks?

Extruded heat sinks can be omnidirectional or bidirectional. Omnidirectional heat sinks allow the air to flow the heat sink at any angle. This is because producers crosscut the heat sink to make them omnidirectional.

Such heat sinks begin as extrusions, and use of crosscut saws make the fins in other direction. As a result, you get a pin-fin grid setup. The crosscut heat sink in a flow angle of 45-degrees has 25% more temperature rise. The arrangement allows you to position the heat sinks perfectly using with the help of clips.

Bidirectional heat sinks allow air to pass in both directions. The air flows following the direction of the extrusion.

What are some of the industrial applications of extruded heat sinks?

Extruded heat sinks are ideal for use in industrial applications. Some common applications include-

Microprocessors: Microprocessors control the function of many industrial machines and equipment. Heat sinks provide an effective way to cool microprocessors to keep them working.

Computers: Various hardware of a computer also use extruded heat sinks. You can find them on processors, graphics cards and more. They are common, whether in industrial or commercial workstations.

Pentium processor heat sink

Pentium processor heat sink. – Photo courtesy Wikimedia Commons

Electrical circuits: Electronic and electrical devices need electrical circuits for proper working. You will need to keep the circuits at the optimum temperature to avoid failure. That’s why you will find heat sinks on most electrical circuits. They are common in-

  • LED systems
  • Voltage regulators
  • Transistors
  • Semiconductors
  • Power transistors
  • ICs

Medical equipment: The healthcare industry has an extensive need for temperature control. They need their devices to work without problems for serving patients. Heat sinks help the medical equipment to work at recommended temperatures. As a result, organizations can ensure the health and wellbeing of patients.

Audio applications: Extruded heat sinks are also present in audio equipment. You can find them, especially in recording studios.

How are extruded heat sinks manufactured?

Extrusion is the most common method of making heat sinks. It is cost-effective too. The heat sink material is passed through a die. The die is made according to the desired cross-section. You can use the manufacturing process to make complex cross-sections. You can also customize heat sinks with various molds after they are made.

What fin configurations do extruded heat sinks come in?

Extruded heat sinks come with pin fins to dissipate heat. You can have three types of pin configurations-

Straight fin: The fins run through the whole length of the heat sink. They exist at regular intervals on the sink with fixed gaps. The configuration is also available as crosscut heat sinks.

Flared fin: Flared pins on a heat sink are not parallel to each other. They can rise at any angle from the base. The configuration is able to reduce resistance and flow. Thus, more air flows through the heat sink and cools your application better.

How can you choose the right extruded heat sink?

You can follow some simple steps to choose the right extruded heat sink. Now the process has become much simpler and easier. You can now use computer programs to create thermal models and simulations. The analysis will then help you determine the heat-sink performance you need.

You can use the findings as a starting point to design your heat sinks. Manufacturers may also provide you with thermal and mechanical models. This creates a thermal map of your application for analysis. You can use them to find out if the heat sink is suitable for your application or not.

Heat sink thermal model

Heat sink thermal model. – Photo courtesy Wikimedia Commons

How to increase extruded heat sink fin efficiency?

You can increase pin fin efficiency in many ways-

  • By increasing the aspect ratio
  • Making the fins shorter in length
  • Choosing a flared pin design
  • Making the fins from a high thermal conductivity material
  • By increasing the surface area of fins

What parameters do you need to select the right extruded heat sink?

You can follow the steps below to choose the heat sink with the right parameters-

Thermal modeling: We have already discussed the importance of thermal modeling. It will help you choose the heat sink with the performance you need. You can use computer software or ask your vendor for modeling.

Material: Heat sinks can be made of aluminum alloys. The material should have high thermal conductivity. Aluminum alloys are most commonly used as they are durable and have good thermal properties.

Diamond is another material with high thermal conductivity. You can also use various aluminum alloys based on your needs.

Fins: Fins can come in different arrangement, shape, size and location. Each arrangement can influence the performance of the heat sink. For instance, flared pins provide a bigger surface area for heat to dissipate.

Fin efficiency: Fins take the heat from the device and transfer it to air or fluid. You can increase the efficiency of fins in many ways. For example, you can increase the aspect ratio or reduce the length of the fins.

Heat sink fins

Heat sink fins – Photo courtesy Wikimedia Commons

What fabrication capabilities are available for extruded heat sinks?

You can make use of various fabrication capabilities for your extruded heat sink. Some common fabrication capabilities include-

  • Drilling (CNC): We use a range of automated and semi-automated drilling machines.
  • Cutting (Sawing): A cost-effective method ideal for prototyping.
  • Sanding: Using sandpapers or sandy balsting equipment.
  • Epoxy bonding: We use quality epoxy for strong bonding.
  • Machining (EDM): We use EDM to build your desired shape using electrical sparks.
  • Deburring: Use of automated deburring tools. It improves the quality and consistency of heat sinks.
  • Fly cutting: Used on milling machines for flat surface of heat sinks.
  • Stamping (High Speed): Paves the way for superior performance and high heat-flux density.
  • Counterboring: For easy placement using cylindrical flat-bottomed hole or coaxial hole.

What is the difference between traditional extrusion and ultra-high ratio extrusions?

Recently, ultra-high ratio extrusion has become popular. The method uses thinner fins on the heat sinks for improved thermal management. You get more surface area per unit width. As a result, cooling is more effective.

Ultra-high ratio extrusion also offers other advantages over traditional extrusion. You can make them at a much lower cost than traditional extruded heat sinks. For example, you can lower costs by eliminating the need for fin-to-bond joints.

But you may need to incur more tooling cost compared to traditional extrusion. However, the good thing is that it’s a one-time cost.

The configuration also makes room for high airflow rates. They do this by reducing airflow backpressure.