In the ideal world, the metal enclosure would have been selected far earlier in the process. It is done in particular so that the size constraints of the PCB would be known. You can design the industrial electronic product and can specify the board components. It is basically prototyped, either on a development board to check functionality and performance or laid out on a final PCB design. It has been tested, tweaked, debugged, tested again, and finally signed off for production. Now what has to be done is to decide on the enclosure. Size The most fundamental questions asked are related to size like how big is the PCB? For direct vertical mounting various plastic enclosures have slots molded into the sides of the enclosure and for horizontal mounting the PCB mounting bosses are molded into the top and base. Material In case of metal enclosure for electronics, material choice is typically among plastic, aluminum, and GRP. ABS and polycarbonate are the most widely used plastic materials. The more stringent test the more is the vertical burn test. Aluminum enclosures are either die-casted or extruded. Both are robust and provide good impact resistance. These are intrinsically electrically conductive and to preserve continuity throughout the enclosure it should not be painted or anodized finishes must not cover mating areas. To significantly increase the surface area to improve heat dissipation some designs of extruded enclosures offer features such as multiple fins. Die-cast aluminum housings are strong and robust. They do not corrode, are electrically conductive. They even have an intrinsically high level of electromagnetic attenuation, and are easily machined. Environmental sealing to IP68 can be easily achieved with a suitable gasket fitted between the lid and the base. With relatively thin walls such enclosures can be cast, however compared to the equivalent sized plastic molded one they will always be far heavier. The die-cast enclosure is the ideal low-cost choice for applications where protection against shock damage is needed, for metal enclosure manufacturer and even for where EMC is likely to be an issue, or where there is expectation of the presence of high temperatures, dust, or water. Follow us on Facebook
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Meba Electric Co., Ltd is a professional manufacturer and supplier of highly designed and premium quality electrical appliances. We always focused on developing our capacity and increasing the efficiency to compete in the current market. Archives
May 2024
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