The extrusion heat sink is usually made of aluminum profile, the most prominent feature of which is heat transfer and cooling properties. Aluminum extrusion heat sink is used for all applications where cooling is an important issue.
It can be said that the extrusion heat sink, which is placed next to any heat source, provided it is properly connected to that source, can take the heat generated from the source, absorb its body and gradually discharge this heat.
Heat Sink is used to cool parts and equipment that get hot during operation. Many types of electronic and mechanical devices use aluminum extrusion heat sinks to dissipate the heat generated by them.
With these descriptions, how exactly does an aluminum extrusion heat sink work?
The simple and concise explanation is that these components gradually remove and dissipate the heat generated by the operation of various devices. In other words, the use of aluminum extrusion heat sink in each part improves its performance and increases its useful life, and allows the equipment and parts to function better, more efficiently, more durable and more durable.
More precisely, by definition, we can call any part or device that absorbs or dissipates heat an aluminum extrusion heat sink, especially when the heat generated is unwanted or detrimental to the performance of the part.
On the other hand, in certain conditions, the heat generated by electrical or mechanical devices can lead to overall system malfunction, fire, explosion and damage.
In fact, the term aluminum extrusion heat sink refers to any type of electronic cooling system that is sometimes referred to as heat dissipating or even cooling. These types of coolers are a type of radiator because they transfer the heat they collect to the environment and away from the source.
Aluminum extrusion heat sinks are used to absorb and dissipate large amounts of heat generated by a variety of electronic and mechanical devices. In fact, any system that generates heat due to its natural function uses devices such as aluminum extrusion heat sinks to dissipate heat to keep its vital components cool. For example, processes such as mechanical, fuel, electronic, abrasive, chemical, solar, or core produce heat.
As we said, there are different types of aluminum extrusion heat sinks. However, all of this equipment is made of metal, which is mostly copper or aluminum.
One of the most common models of aluminum extrusion heat sinks are finned models. Of course, there are other examples, such as pinned and stamped models. There are also some molding methods for these parts to produce that help increase the surface area and the average amount of heat dissipated.
The majority of aluminum extrusion heat sinks are inactive. Passive means that heat dissipation from the manufacturer’s source does not require special equipment or processes, and as long as the aluminum extrusion heat sink is in contact with the desired part or part, heat transfer and dissipation will take place.
However, cooling devices such as electric fans can be connected to aluminum extrusion heat sinks to perform the heat dissipation process with better efficiency and quality. Products that use this technique to dissipate heat are known as active aluminum extrusion heat sinks.
As mentioned, aluminum extrusion heat sinks that do not require products or ancillary processes to cool a part are called passive aluminum extrusion heat sinks. When you connect an aluminum extrusion heat sink or passive cooler to an electrical or mechanical device, the heat generated is transferred directly to the outside environment through direct contact of the device with the heat source.
Because heat dissipation is common in these extrusion heat sinks without the use of fans or cooling methods, passive extrusion heat sinks are generally larger in size than other active or active models. The connection of this blade-like equipment increases the surface area, which is very important for heat dissipation, diffusion to the outside environment and helping to cool the part in question.
Products such as passive aluminum cooling heat sinks are mainly used in electronics or low-power machines because they are not hot enough to require an active cooling system.
On the other hand, these types of products are a more cost-effective way to dissipate heat, especially for very large parts that make it virtually impossible to install active cooling systems. Because these systems must have a lot of free space around their installation site.
Active extrusion heat sinks are products that use devices such as fans, water pumps, or any other powerful process to increase cooling capacity and increase heat dissipation speed. In computers and electronic systems, these types of coolers mainly help dissipate heat from the computer’s internal power supply.
The most common form of active extrusion heat sink is one in which one or more fans are attached directly to or on one side of a set of extrusion heat sink blades or blades. These fans increase the efficiency and work efficiency of this part to dissipate heat by sucking / pulling the fresh air flow through the extrusion heat sink. You’ve usually seen extrusion heat sinks that have a fan called an HSF connected to them.
More advanced models of active heat sinks use water or other liquids, which greatly help dissipate heat from the production site. The simplest form of liquid cooling system is called closed loop cooling or CLC.
In a CLC device or equipment, the function of a pump is to suck water or coolant around a network of closed pipes or closed ends. This liquid flows through a block that flows directly to the components to be cooled, that is, exactly where it absorbs heat through direct contact with the target plate.
After this stage, it is time to transfer the liquid to the radiator or extrusion heat sink, in which the secondary heat transfer will occur directly between the water and the surrounding environment. In this method, the liquid is completely cooled before returning to the system and this cycle is repeated.
Extrusion Heat sinks that work with a fan or pump are mainly used in temperature control systems in electronic devices that are involved in protecting and improving the performance of various chips, LEDs, IC components and other modules. These components are very important in computers because the CPU and graphics card generate a lot of heat when they are active.
In such systems, if sufficient and powerful cooling equipment is not used, serious damage to the circuits will be caused by physical damage to the circuits or through a process called Thermal Throttling. This happens when a computer or any other intelligent system notices an increase in the overall temperature of the components and tries to control the rising temperature of the system by limiting the power required for the key components.
The thermal conductivity of aluminum is not as high as that of copper, but it is much lighter and cheaper. Aluminum metal has a very high structural strength, even when used in the form of thin sheets (extruded aluminum), which is not the case with copper extrusion heat sinks.
Many aluminum extrusion heat sinks have a common design feature. In designing and manufacturing this type of products, heat dissipation is possible through the number of blades or thin metal blades.
Some types of extrusion heat sinks, such as vane models, can be made of aluminum and copper.
A blade extrusion heat sink is actually a metal block that comes in the form of several fins or blades or a large number of very thin plates that arrange the blades outward from the center.
This type of design has increased the surface area of this type of extrusion heat sink, which in turn will have a great impact on the effective and efficient transfer and dissipation of heat from all the parts to which this extrusion heat sink is connected.
Several processes can be used when designing and manufacturing extrusion heat sink blades. Today, they mainly use methods such as die-casting, die-casting, CNC machining or milling.
Die-cast heat sinks are more common due to their lower price and bulk sales, while CNC-produced products are more expensive but of higher quality and sold only in small quantities.
Veneer extrusion heat sinks are also known as vane extrusion heat sinks or vane coolers. In fact, this type of extrusion heat sink is another type of very common and widely used extrusion heat sink that we mentioned.
In this model, a number of pins or rods are placed upwards or out of the center from the central part. These pins or blades are cylindrical, elliptical or square. These types of products have a larger surface area than blade samples. However, these types of products will not significantly improve the performance of the parts used in them and are much less used today than blade models.
Daily uses of extrusion heat sinks include:
The choice of extrusion heat sink material depends on the amount of heat dissipation expected from it and the type of application.
Metals are good conductors for heat and electricity, but we can not use any metal as an extrusion heat sink. Gold has the best conditions for heat dissipation, but due to the high world price of this precious metal, it can not be used as a suitable material in the manufacture of extrusion heat sinks, and only in certain industries, this metal is used very limited to make extrusion heat sinks. It becomes.
Copper is also a good conductor of heat, but copper metal is also very heavy due to its high density, which increases the cost of producing copper-based extrusion heat sinks, which is a disadvantage for copper and limits its use. This material is used in the production of extrusion heat sinks.
In addition to the high volumetric mass of copper, the low ductility of this metal can also be considered as another weakness for it.
Today, all over the world, aluminum metal with atomic number 13 is used to make heat sinks. Aluminum is a metal that is both relatively inexpensive and abundant almost everywhere. Another advantage of aluminum is that it can be easily combined with other alloys. High ductility is also an advantage for aluminum.
Aluminum has a density of about 2.7 grams per cubic centimeter, which is about one-third the density of steel. Aluminum is produced in the industry by electrolysis of molten aluminum oxide, and caustic soda is used to separate aluminum.
The strength of aluminum alloys can also be increased by selecting the appropriate alloy and sometimes by performing special heat treatments to the strength of steel. Aluminum melts at 650 ° C, which takes a relatively long time to reach. Aluminum does not produce any dangerous or toxic gases or fumes when heated or even melted.
Aluminum does not absorb moisture, does not crack, does not crack or tear. Aluminum does not require any UV protection. Another great property of albumen is its corrosion resistance. Natural oxide, which is always present on the surface of aluminum, is a great barrier against all kinds of corrosive substances.
Aluminum is a metal that is anodized, that is, aluminum is placed as an anode by applying an electric current, a layer of oxide is created on its surface, which is thicker than the layer of natural oxide.
In addition, it gives aluminum the ability to paint. During the anodizing process, aluminum can be turned into beautiful colors and it can be beautified and strengthened, as a result, a beautiful and attractive design is produced, the surface of which can be easily washed with hot water and does not require any cleaning and maintenance, and is naturally durable. It is corrosive.
The extrusion heat sink is used in all applications. The simplest example is the use of extrusion heat sinks in computer CPU fans to lower its temperature. The next example is the use of electronic boards. Such as washing machine board or side board and….
The reason for using an extrusion heat sink is its cooling properties. It can be said that one of the important features for an extrusion heat sink is its heat dissipation and cooling properties. Therefore, heat exchangers can be a good equivalent for heat sinks.
There are components such as different types of transistors, thyristors, diodes, IGBTs and POWER MOS FETs as well as POWER LEDs that generate heat due to the production activity. Now, if we do not dissipate the heat produced in these parts properly and continuously, we will reduce the useful life of these parts.
So far, we have talked about the use of aluminum extrusion heat sinks in a specific and specialized way. Now we are going to examine the methods of making an extrusion heat sink together.
Before making modern extrusion heat sinks, manufacturers of various appliances in the electrical, electronics, and telecommunications industries, if they felt the need for an extrusion heat sink during the manufacturing process, manually made a metal such as copper or aluminum, which is more than They chose the sheet or ingot of these metals and designed a very simple shape of an extrusion heat sink.
Here it was only the metal’s own heat dissipation feature that played the cooling role, and no air or water ducts were used to cool the extrusion heat sink. With the passage of time and the development of the industry, new methods for creating profiles in various forms emerged. Methods such as die casting and extrusion or the same extrusion which was also called INJECTION or injection.
In the die-casting method, they act like casting methods by making a mold in precise dimensions and according to the plan required for the extruded heat sink. The aluminum metal is heated to melting point and then pressed into the mold. This process is performed under the pressure of pumps or hydraulic presses.
On a large scale, the best method is Extrude. In this method, the profile can be produced in lengths of 3 to 9 meters or even higher, and in later stages, using different machines, the profile can be cut to the desired size.
Forming metals such as aluminum is a specific process that enters the mold by pressure with the hydraulic force of a billet and exits the mold as extruded products in various shapes.
Extrusion presses are made in certain sizes and their size is directly related to the size of the billet that needs to be extruded. In this method, the billet first enters the furnace and reaches a temperature of approximately 450 degrees Celsius (between 426 and 496 degrees Celsius).
To design an extruded heat sink for special purposes and to connect to specific parts, many points must be considered, so that the final product can be used easily. For example, if the extruded heat sink is to have different types of relays and the ability to install a fan at the same time, to design such a mold, comprehensive research must be done to properly calculate and design the dimensions of the heat sink.
Adequate space should be considered for connecting the fan to the extruded heat sink, and if possible, the screwing area should be installed on the cross-section of the extruded heat sink so that less machining is required during use.
The safest way to choose an extruded heat sink is to view their thermal diagrams, so that by matching the information in this diagram with the data of your electronic components, you can select and prepare the appropriate extruded heat sink for your needs. Of course, accurate and reliable heat sink diagrams are less available in online sources that can be used to select the appropriate extruded heat sink.
Therefore, our suggestion is that the tolerable power of parts loss is extracted from their catalog and the heat loss capacity of the extruded heat sink is calculated using GSH software and used with a 20% confidence interval for the desired part. You can multiply the use of the extruded heat sink by choosing a suitable extruded heat sink.
After producing profiles in different shapes, these profiles are stored in large sizes (usually 3 meters) in the warehouse. According to the customer’s needs, these branches should be cut to the required size with precision cutting machines. After drilling and drilling on the surface and wall of the extruded heat sink to install the parts, the contact surface of the extruded heat sink and the heat source must be smooth and smooth, which is called flat.
If the surface of the extruded heat sink is uneven or even has scratches and scratches, the heat transfer from the heat source to the extruded heat sink is not done well and this part may be damaged and its useful life may be reduced due to the increase in temperature in the heat source.
For better heat exchange between the extruded heat sink and the heat source, silicone paste is sometimes used as an interface between the two. Finally, the best possible condition for the surface of the extruded heat sink is that the surface of the floor piece is paved and then sanded with special machines in several stages to finally form a mirror with the surface polishing machine. In this case, the best heat exchange between the extruded heat sink and the heat source occurs.
Usually the best type of extruded heat sink to buy depends entirely on the type of activity and operation as well as your need for cooling systems. In order to know which products are the best type of extruded heat sink for your industry, you need to have some basic information about your ultimate and main goal.
Depending on the type of system you have, what is the best design or extruded heat sink model for the best heat dissipation performance?
Do you need active or inactive heat sinks?
How much do you plan to spend on a cooler?
Almost every type and model of heatsink has its own installation method, although most of these products are very similar. In most cases, the installer of these parts must connect the cooling plate to the surface of the part to be cooled. This is usually done by hand clamps or bolts. Heat sink installation accessories are very diverse and have different models such as spring clamps, rivets, screws and adhesive tape.
Almost all extruded heatsinks, especially those used for computers and motherboards, require heat paste to be installed between the workpiece and the cooling plate or heatsink.
Thermal paste, also called thermal grease, or TIM, is a heat-conducting material that improves heat transfer between two metal plates. This paste fills any small gaps between the two metal plates to make the cooling operation much more efficient. Over time, this thermal paste dries and leaves cracks that must be reused.
Like any other electrical appliance you know, the active parts in a power amplifier, especially transistors, generate a lot of heat as the current flows. Just like computer components, these components have a specific operating temperature threshold that should not be exceeded, otherwise the risk of damage, failure or, in the slightest case, will prevent the components from functioning properly.
By purchasing a suitable heatsink for these parts, while protecting sensitive electronic devices and the people who use them, you will be assured of the excellent performance of these parts.
Low-cost, small computers, usually the size of a palm, attached to a monitor or TV and used for small office work, do not require a heatsink.
Although some of the newer models have been found to consume a little more power, most of the chips used in them are designed so that they do not need a heatsink for proper and continuous operation.
Today, LED lighting is a large part of the world’s lighting. Aluminum extrusion LED strip heat sink lights have many advantages, including energy savings, reduced maintenance costs, long life and rust resistance. Scattering, light weight, easy installation, etc.
have made the aluminum extrusion LED strip heat sink lamp to be used in many fields and to be used in industrial and non-industrial applications. Therefore, the production of aluminum extrusion LED strip heat sink lamp It is increasing day by day in the world.
Rosenberg Aluminum Plant is a manufacturer of aluminum extrusion thermal sinks with a brilliant history and expertise in the production of these thermal sinks and uses 6063 alloy for its own production.
Production of aluminum extrusion heat sink with advanced equipment and up-to-date machines in order to control energy and heat loss, as well as help the environment, etc.
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