Encapsulated coils as the name suggests are
electric coils that are encapsulated with protective coverings. This is to provide optimal protective covering for harsh work environment situation like moisture, salt, oil or vibration.
The materials used to encapsulate any kind of
electric coils are silicon rubber, polyester, liquid or thermoformed epoxy casing. Among the various application areas where these
encapsulated coils are integral to solenoid valves, transformers, transducers, circuits, electric motors and many electronic household appliances.
Well, so what are electric coils and why do they need protective covering?
They are nothing but metal wires that are coiled for electromagnetic properties which can be activated to magnetism with the introduction of electric current. And this electromagnetism allows movement and transfer of electric current. Hence, they have a very delicate performing quality. So, when these coils are exposed to harsh conditions then they might lose their conductivity, and hence they need to be protected. And, hence the use of encapsulated coils!
So, whats the difference between encapsulated coils and molded coils?
Well, they are almost same, as both are used to provide protection to
electric coils. And they almost overlap.
Molded coils are used to enclose injection molded or thermoplastic coverings to seal the entire coil unit. On the other hand,
encapsulated coils most of the times use liquid or thermoformed polymer epoxies, so that the coil gels with its casings and become one with it. However, it is to be mentioned here that encapsulated coils often offer better protection which injection-molded casings do not have the capacity for.
What is the process involved in the making of encapsulated coils?
The process of making
encapsulated coil as has already been mentioned involves encasing the electric coils with liquid or thermoformed polymer epoxies. They are usually heat treated at the post production phase, so that the plastic part and molded coil sinters inside thus providing better protection when used in any sector.
Solenoid coils can also be encapsulated whenever and wherever required.
Whatever, your area of operation is it is recommended that you use encapsulated coil systems that cover UL requirements for compatibility with all kinds of
electric coil materials
