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You don't know the secret of the heat sink manufacturing processes

An air cooled cooling products, the effect of good or bad in addition to the fan to see the air volume, more is dependent on the design of the heat sink. A properly designed heat sink can make the computer run stably when it is not overclocked and not continuously full. It can be seen that the importance of the heat sink, and the heat sink heat dissipation effect and its production process is inseparable.

Nowadays, the production process of heat sink includes several technologies such as cutting, skiving, extrusion, stamping and die casting, etc., and more than ten kinds of specific heat sink manufacturing processes have been developed. In the following article, small make up will be for you one by one, let you in the choice of cooling products do know.

Cutting and aluminum extrusion

Strictly speaking, cutting is the abbreviation of a large class of production technology, such as high-speed cutting, laser cutting belong to this class, but they have a common point is the car, drilling, milling, grinding and other machine tools, in the heat heat sink fin forming process, in order to obtain some more special, fine shape, need to use cutting technology. Mainly used for plate forming (base, fin formation), heat sink grooves, special lines and so on.

Aluminum extrusion is will aluminum alloy ingot heating to 520 ~ 540 ℃, using mechanical pressure, the liquid aluminum through the extrusion die made of steel, in the mold exit to the cooling of liquid aluminum, rapid solidification, become a continuous parallel structure of heat sink in the early embryo, again to clip the early embryo, and he saw us common extruded heat sink.

Precision skiving and aluminum die casting

I have to say, this is a very landmark metal forming process. The definition of precision skiving is to cut a whole piece of metal profile according to the need, using a special planer with precise control to cut out the specified thickness of thin slices, and then bending up to an upright state, as a skived fin.The easier way to think about it is to take a piece of metal and cut it into the shape of a heat sink that we normally see.This method is most common in the pure copper heat sink.

Aluminum die casting is a widely used single aluminum alloy processing process. After melting the aluminum alloy ingot into a liquid state, it was filled into the model, and formed by die-casting machine in one time, and then after cooling and subsequent treatment, it was made into a single die casting heat sink.

Folding and soldering is the mainstream

The thin, dense heat sinks that we see are made in this way. In forming, the edges of the fins are left with a small specially designed bulge, which is fixed in a custom-made mold, and the bulge is bent and locked together to form an orderly arrangement of parallel fins. In combination with stamping, it is mainly used to manufacture parallel dense thin fins for reflow soldering or air duct design.

Soldering is a familiar way of metal processing. The most commonly used soldering method in heat sink processing is reflow welding, also known as reflow welding. At present, most of the heat pipe heat sink, heat pipe and fin connection is welding. Because the joint degree of welding directly affects the heat dissipation effect, the cost of welding is higher.

A variety of heat sink technologies.

Actually we in addition to the above these cooling process forms, as we can often see cold forging, bonded fin, and other heat sink technology, the process is more or less still appear in our computer cooling form, just for the cost or the cause of the heat dissipation effect is less and less, but these are still for heat sink has played a contribution to the development of technology.

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Supermicro 4U Active CPU Heat Sink

The Supermicro 4U Active CPU Heat Sink, which also known as the SNK-P0070APS4. In itself, this Supermicro 4U CPU  Active Heat Sink is a simple unit that keeps things basic. It is built to work and not look pretty. After all, it is designed for use in rack servers. In fact, The Active CPU Heat Sink is designed for Supermicro’s X11 generation general 4U server & workstations, but that doesn’t limit you to them. Of course, you can use it for any system you build in which it will fit. The only demand is that the motherboard you’re using has the narrow mounting mechanism.

This 4U Active CPU Heat Sink supports a TDP of up to 205W, which also includes all currently available Intel Xeon Scalable processors.

The attached cooling fan is a 4-pin PWM model with a fan rotation speed of up to 3800 RPM. With such fan speeds, it’s clear that it won’t be the most silent cpu cooler on the market. On the other hand, it has impressive results. But in terms of noise generation, the fan is rated for up to 38 dBA.

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Factors of better heat Sink design

What are Heat Sinks Used For?

 Heat sinks are used in electronic equipment and components to provide the auxiliary cooling needed to prevent components from overheating. These components are designed and optimized to ensure that the electronics operate within the temperature range provided by the manufacturer.

 Factors of heat sink design

 1. Thermal Resistance

2. Material

3. Shape, Arrangement, Size, and Location of Heat Sink Fins

4. Heat Sink Fin Efficiency

5. Thermal Interface Material

6. Heat Sink Attachment Methods

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Introduction of stamping heat sink

Stamping is the cold extrusion of thin sheet metal forming process, used to make stamping heat sink  sheet metal is mainly copper and aluminum. The stamping fin heat sink is mainly welded by stamed fins and base plate.

Difference between stamping heat sinks and laser-cut heat sinks

Compared with the stamping process, the cost of laser cutting is not too expensive, about 1 cm /0.005 yuan.

Advantages: mainly used for cutting irregular workpiece, small burr, accurate size, low noise,

Disadvantages: low efficiency, one-time equipment cost investment.

The advantages of stamped heat sink are: high efficiency, small investment, easy to grasp the technology,

Disadvantages: big burr, big production noise, can not be a single impulse shaped.

Lori produces all kinds of hardware stamping parts, stamped fin heat sink , suitable for a wide range of electrical products, electronic components of stamping parts. Can be customized by drawing, unit price according to the number of customers, specifications, appearance, materials and other requirements. Welcome to our customers!

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THESE HEATSINKS MAY HELP

Although the term laptop heat pipe may not be what most people think of when they hear the word computer, exactly. Without heat pipe technology inc, modern computers couldn't run at the speeds on their regular basic. Just as you cool down with a cold bottle of Gatorade after a high impact workout, heat sink also dissipates the heat of your computer's processor after it runs multiple programs simultaneously. And if you don’t have a qualified heat sink, your computer processor may be overheating, which could destroy the entire system, costing you lots of money and energy. Thus, having a custom heatsink will be a nice chioce.  

But the question is what exactly a heat sink is and how it works? Simply speaking, heat sink is an object that disperses heat from another object. They're most commonly used in computers, but also found in cell phones, DVD players and even refrigerators. In computers, a heat sink is an attachment for chip heatsink that protects the chip from overheating and, in modern computers, it's as important as any other component.

If you aren't very good at it, think of the heat sink like a car radiator. The same way a radiator draws heat away from your car's engine, a heat sink draws heat away from your computer's central processing unit (CPU).

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This is how chip cooling works

In the early days of computers, there weren't many computer components that used large heat sink. With the increasing power of computers and prevalence of overclocking among computer players, modern computers have increasingly high requirements for the heat sink of important components. Methods of heat-dissipating are various, basically divided into air cooling, chip heat sink,  water cooled plate and so on.

The commonly used one---air cooling, in fact, is heat sink fins with good thermal conductivity tightly against the larger chip. Above the heat sink there is a small fan.  In this way, the airflow generated by the high-speed rotation of the fan takes the heat away from the fins. Pay attention to these points when choose air cooling: Regardless of the material problem, I believe there are still many people think that, the larger the size of the heat sink is, the better the heat dissipation effect can play. In fact, the quality of heat sink has no absolute connection with its "volume", but the "surface area" size and heat dissipation have a direct relationship. In other words, the greater the surface area of the heat sink is and the more grooves it has, the better it will be.

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Where can’t copper heat sinks be used?

Copper heat sink has its advantages, also have its disadvantages. As is often the case that distributors and manufacturers always introduce advantages of heat sink while the disadvantages are hardly mentioned. However those shortcomings are often the key to solving the heat sink problems.

Large heat sink has great demand for water quality of heat-supplying system. If it has a simple corrosion phenomenon in the unsafe heating system, chip heat sink manufacturers said that consumers should know whether the heat sinks match the residential heat-supplying system before their purchase.

Since water quality of those residential heat-supplying system can not reach the specification, recently companies have begun to take corresponding anti-corrosion measures.

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What opportunities and challenges does the aluminum heat sink industry face?

This has been a tough year for the heat sinks suppliers. Large heat sink industry in the war on the battlefield, the future is the battle of soft power. The strong will grow stronger, and the weak will fade away. Now those predictions are coming true. Fixed aluminum heat sink market rise is weak, in the early stage of change, the performance of aluminum heat sink companies slow down the trend. At the same time, the changing environment at home and abroad has put the company under unprecedented pressure to survive.

First, the growth rate is slowing down

Data show that even though the market for heat sinks aluminum in China is still growing steadily, the overall upward trend has slowed down significantly. Aluminum heat sink on the market up slow, the company up drive is insufficient. While the cost of heatsink materials and labor continued to increase, the price of aluminum heat sink continued to decline, resulting in the compression of the profit range, which further affected the performance of aluminum heat sink company.

Second, trade friction

After more than half a year of trade friction, to a large extent affected the domestic economic growth rate. At the same time, it also restricts the export of Chinese goods to some extent.

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How to effectively prevent the false warranty of heat sink?

The quality assurance, after-sales service of the Led light heat sink is in order to protect consumer interests and make a commitment, and also the important aspect for customers to buy heat sink. So, the large heat sink manufacturers will invest a lot of money in quality assurance and after-sales service. Contrary to this, those heat sink manufacturers of opportunism use false quality to cheat customers.

1. Purchase heatsink from dealers:

Be sure to pay attention to the dealer warranty and manufacturer warranty is consistent. Because the dealer authority is limited, the quality assurance is impossible to do very perfect. And warranty commitment of the dealer is also authorized by the manufacturer.

2. If you buy the Led light heat sink from the Internet:

After understanding electronic heat sink (like electronic cooling plate) relevant information beforehand, inquire the official website of this manufacturer seeing whether it makes the written explanation to the Led light heat sink quality assurance problem. If not, you must call the consultation to fully ensure your interests are not damaged.

3. Claim that there is a physical store but is not:

The real situation may be a small factory with dozens of people, they even need to order products from other manufacturers. It’s not hard to imagine the quality of their assurance and after-sale service. If the economic conditions allow, you can visit the field and then make the purchase.

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The requirements of electronic heat sink surface quality

LED heat sink manufacturers believe that the surface should be protected, which means its resistance to moisture, salt spray and mold should meet the corresponding LED standards.

Pay attention to water leakage prevention, block prevention while the heat sink is working.

Generally speaking, led heat sinks suppliers have the following requirements for the surface quality of heat sink for Led lights:

1. The surface of the heat sink should be free from shrinkage, corrosion, crack and other defects.

2. Metal fasteners of flat-plate heat sink and conductive plates of water cooled heat sink should be protected by coating.

3. The allowable value of surface roughness of the cooling body table is up to 3.2m.

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Heat sink components--- heat pipe

As electronics have become smaller and more powerful,heat pipe technology has become much more prevalent among industries.Lori is equipped to meet industries’need of the high volume production Consumer Electronics or the research and development for Aerospace & Defense.

Lori manufactures its own heat pipes and maintains strict quality standards to ensure the longevity and reliability of our heat pipe heat sink.Heat pipes capabilities also include loop heat pipes and high temperature heat pipes.Lori has been performing heat pipe and loop heat pipe life testing on a variety of material systems and heat sink conditions for years.Material systems and heat sink conditions include copper pipe water cooling,copper-water sintered     powder,copper-methanol,aluminum-ammonia,natural convection,forced convection,and liquid cooling.

With ongoing lifespan testing on copper-water-sintered power heat pipe systems,Lori has developed proven manufacturing processes that ensure the lifetime and reliability of our heat sink.

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How does LED heat sink team achieve order increment on the Internet?

Since the development of China's manufacturing industry a few years ago, the thinking of entrepreneurs has also been gradually broadened and new words have been introduced to adapt to the innovative development. The most prominent word is "Internet plus", which means innovation and entrepreneurship.

There’s no doubt that Internet has promoted all kinds of companies to a certain extent. Like Sharing bikes have attracted much attention. But how can the production team of Large heatsink increase their orders by the Internet?

First of all, we should be clear what the product is and where the market is? What are customers' concerns about Led light heatsink?

Only by knowing customers' concerns and dealing with them can a team set up an accountable image. Like the 100w LED heatsink, the customer is more concerned about the LED heat sink frequency. Is there a simple way to comply with the operation of the new product when changing the product operation? These important issues about the quality of LED heat sinks are what customers will attach great importance to. It’s quite important for a team to achieve large-scale development by dealing with customer difficulties.

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Extrusion technology makes a better heat sink

Aluminium extrusion heatsink  must have extremely high requirement on shape design and dimensional accuracy. Plus,round aluminum heatsink should have no error in molding process to achieve the best heat dissipation effect, which means the help of technology of aluminium heat sink is indispensable.

Extrusion molding is to put in the mold cavity of the alloy material to exert a strong pressure making the aluminum alloy directional deformation. And then obtain the proper section shape, size and certain mechanical properties of the parts processing method.

Using heat sink extrusion technology can make heat sink of high precision, good surface quality and the solid structure, which ensure the pass rate of our products. However, the traditional welding technology is not as good as extrusion molding. It doesn’t meet the accuracy demand and easy to rot, which affects the stability of the whole structure.

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How to improve the utilization of high power led heatsink?

While using LED heat sink, how to improve its efficiency, especially when we use high power led heatsink. Here below are relevant instructions.

The heat sink temperature control valve is installed on the automatic control valve. Its control elements are temperature-sensitive materials filled with temperature control components. When the temperature rises, the temperature pack expands to make the valve smaller, reducing the hot water supply to the aluminum heat sink for led. If the temperature drops, the situation is reversed, thus the purpose of temperature control achieve. The LED heat sink temperature control valve can also adjust the set temperature and automatically control and adjust the hot water supply of the LED light heat sink according to the set requirements. Luckily, LED heat sink temperature control valve with built-in preset device solves this problem.

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Fin design of round aluminum heat sink for led light

The round aluminum heat sink is designed as a sunflower shape and fin shape, not only to increase the contact area with the heat source absorbing more heat, but also increase the contact area between heat sink in led lights and air in order to disperse heat to the air more quickly.

Here people may wonder if the thicker fins are, the better cooling effect will be.

Absolutely not, the round heat sink of the whole area is finite. Thus, more fins means that there’re more contact areas to absorb more heat, but it also means that the spacing between the fins is shorter. the air flow velocity of each channel is slower as well, which results in difficulty of dispersing heat to the air.

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How to produce a led light heat sink with good cooling effect?

Heatsink for led as a high heat dissipation efficiency of a heat dissipation tool, different LED heat sink manufacturers master different technologies, the production standards are different, the led light heat sink produced in the heat dissipation effect will have advantages and disadvantages. So how can LED heat sink manufacturers produce a good cooling effect led light heat sink?

Heat sink bottom thickness design. Many people in contact with the led light heat sink will think that heat pipe fin is the key to heat, in fact, the bottom of the heat sink is a part of the heat can not be ignored. The led lighting heat sinks should adhere to the principle of being thinner from the heat source part to both sides on the bottom design, which is to ensure that the heat absorbed by the heat source part can quickly transfer to the surrounding thinner part. And then achieve high efficiency heat dissipation. If bottom heat sink is designed level off, the heat of heat source part diffuses hard, so that the heat will affect heat sink absorbs heat source further.

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It’s time to build a high-level management system.

Lately, led heat sinks suppliers formally starts to implement the high-level management by maintaining the original quality management system and continuously improving the quality of product and service. We will try our best to achieve customer needs. Suppliers continually change the effectiveness of the quality management system.

Led heat sink suppliers attach great importance to quality management system construction, workers' quality concept and professional technical training. As long as workers' quality concept has been improved, led chip heatsink will be improved as well.