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What is electronic potting and its role in the electronics industry?

What is electronic potting

This article will introduce about electronic potting. Electronic potting products from small electronic components, precision instruments, military communication products, and a variety of electronic casting products large transformers, from motor coils to high-voltage electrical current transformers, cable junction boxes and cable terminals, etc., anhydride curing agent has been widely used.

What does potting mean in electronics?

What does potting mean in electronics?
Electronics are “potted,” which extends product life and improves safety by encasing electronic components and assemblies in a shielding resin to guard against external threats. This treatment can shield you against harm brought on by Air\Water,Physical force, chemicals, heat, dust, and modification.It may also provide plainly evident protection for both consumer information and intellectual property.

What is the purpose of potting in?

The automotive sector employs a variety of electrical systems and components, all of which may be exposed to dust, liquids, dampness, vibration, and extremely high or low temperatures. It is possible to pot strategic sections and components to improve reliability and delay ageing and failure.

To guarantee the continuing, trustworthy operation of the electronic systems and conduits, effective protection of these components must be used while pressure washing forklifts and other construction machinery at the end of shifts. Again, potting can protect exposed parts from harm.

The effective operation of traffic lights, switches, power supplies, sensors, and other electronics used in infrastructure is dependent upon sealed enclosures. After the enclosures lose their effectiveness due to ageing, temperature changes, mechanical stress, etc., reliable operation is not guaranteed. Strategic component potting might improve dependability and lower maintenance and replacement costs.

What do you use to potting electronics

What do you use to potting electronics?

The most popular materials used by fabricators for potting electronics are epoxy and urethane. They provide the electronics they cover with a tremendous level of protection because to their extreme hardness. Urethanes can withstand temperatures of up to 180 °F, but epoxy materials can often withstand temperatures of up to 250 °F, depending on the product. Additionally, urethanes and epoxies offer high adherence to components, making it challenging to remove them.

Additionally, they safeguard your intellectual property from rivals that attempt to reverse engineer already-available items since they are difficult to remove. Although these materials’ strength and stickiness have many advantages, they can also have characteristics that make them challenging to deal with. The biggest issue is that once the potting is placed, it cannot be removed. Repairs are rendered impossible as a result every time a part requires repair, you must scrap it.

How is potting done?

Potting material was able to go into places it wasn’t supposed to since some electrical components couldn’t be adequately sealed. Such components must be recognized in order to prevent future malfunction.Various processing stages are necessary for various potting materials. They can require unique mixing, different temperatures, different techniques for getting rid of bubbles, and further curing to lessen shrinkage. Perhaps vacuum chambers are required to remove bubbles (also known as “degassing”). For some complex potting jobs, a higher viscosity of the potting material is necessary, and this is achieved by increasing the temperature.

What is the difference between potting and encapsulation?

There is a little difference between “potting” and “encapsulation,” despite the fact that the terms are occasionally used interchangeably. Once the resin has cured and the component is enclosed, the container is destroyed, leaving the component and its resin shield intact. In the potting procedure, the resin-filled “pot” or container is integrated into the finished component.

How do you remove electronic potting compound?

Figuring out what sort of potting material it is is difficult. However, you can attempt the typical techniques for de-potting listed below, from from easy to hardest: Warming it up When you just heat a substrate to roughly 150 Celsius, certain chemicals start to separate from the substrate. The separation might be aided by soaking it in water in between heating cycles. With a hammer, strike it.

A strong impact may cause the coating to detach if it is only present on one side of the PCB, as seen in the illustration.bath in acetone. Scrape off any ooze after an hour, then repeat the process until all of the plastic is gone. Simple safety measures like protective gloves and eyewear are required.bath of heated nitric acid. This will need the elimination of fumes and around 70% nitric acid.Without a suitable lab setup, Obviously, there is a serious chance that the electronics will be harmed by all of them.

Can I use silicone as a potting compound?

A distinctive mix of flexibility, resistance to high and low temperatures, and stability of mechanical properties across a broad temperature range are all offered by silicone potting compounds. Silicone is a soft, flexible material with a high elongation that is ideal for sealing fragile electrical components. Silicone gels are frequently used for particularly delicate equipment because they facilitate repairs.Can I use silicone as a potting compound
The most flexible and least mechanically strong potting compounds are silicone-based ones, although they can endure working temperatures of roughly 200°C and are very temperature resistant. Silicone potting compounds are growing rapidly on a global basis as one of the essential parts of the electronics and automotive industries.These substances offer defence against environmental elements such as corrosion brought on by water intrusion, dampness, or security from caustic chemicals and gases.

What is epoxy potting compound used for?

Printed circuit boards and devices are protected by potting materials. The best electronic epoxy encapsulant potting compound provides superior protection against water damage and chemical, mechanical, thermal, or electrical shock.

A wide range of distinctive qualities, including as flame resistance, thermal conductivity, optical clarity, and dimensional stability, are included in the best electronics epoxy materials.When a polymer resin and a hardener are combined, a chemical reaction occurs that cross-links the chemical bonds in the polymer chains to produce a tough, stiff, and strong material.

This is known as two-component epoxy.Epoxy potting materials provide the following advantages:
√ High tensile strength and stiffness (tough and durable in the cured state)
√ Capacity to tolerate high temperatures (from -150°C to +150°C or greater)
√ Minimal shrinking
√ Good adherence

Does potting compound transfer heat?

Does potting compound transfer heat
When potting or casting electronic modules that contain heat-generating components, thermal conductivity is a crucial factor to take into account. In order to keep the maximum operating temperature of the circuit’s most sensitive component from being exceeded, the heat produced during operation by the different components must be dissipated.

Heat energy moves from hot to cold, hence there has to be a temperature difference between the device and ambient air for heat to be transferred. The potential for heat transmission increases with temperature difference; conversely, the potential for heat transfer decreases with decreasing difference.

Conclusion

Electronic potting is used for bonding, sealing, potting and coating protection of electronic components. Potting adhesive is liquid before curing, with fluidity, and the viscosity of the adhesive varies according to the material, performance and production process of the product. Potting glue is completely cured to achieve its use value, after curing can play a waterproof moisture-proof, dust-proof, insulation, thermal conductivity, confidentiality, anti-corrosion, temperature resistance, shockproof role.

There are many kinds of electronic potting adhesives, from the type of material to divide, at present the most common use of the main three kinds, namely, epoxy resin potting adhesive, organic silicon resin potting adhesive, polyurethane potting adhesive.

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