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116. The process of rapid prototyping

We all know the rapid prototyping has already brought us a big change. But wether did you know the process of rapid prototyping? May be few people know it.

Rapid prototyping (RP) is a digital modeling process, which is a real physical model of a component (in prototype form) that is entirely created directly from a 3D CAD drawing. RP systems generate quick prototypes by constructing an additive and layer-by-layer process that is driven by 3D CAD data. RP is also known as desktop manufacturing or free-form fabrication. RP machines require STL data files, which are generated by the CAD system. An STL file is a data file format designed specifically for rapid prototyping machines. Any rapid prototyping system can use the STL file from any type of 3D CAD system that outputs the STL data. RP machines operate quite differently than typical CNC machines. RP machines are subtractive in nature, because they join together liquid, powder and sheet materials to form complex forms. Using layer-by-layer technology, RP systems fabricate plastic, wood, ceramic or metal objects based on several cross-sections from a 3D CAD model.

In fact, the process of the rapid prototyping is very complex. But it is very important for our life. So we should know more things about it.