What Is Rapid Prototyping? Principles, Technologies, and Applications

Rapid prototyping technology, also known as RP technology, was developed in the late 1980s and is a high-tech manufacturing method based on additive material buildup. It combines advanced technologies such as computer-aided design, computer-aided manufacturing, computer numerical control, precision servo drive systems, and new material technologies into one integrated production process.

Based on the three-dimensional product model created in a computer, the digital model is sliced layer by layer to obtain the contour information of each section. Different forming methods are then used to create each layer. For example, a laser may be used to selectively cut sheet material, cure liquid resin, or sinter powder material. In other cases, a heated nozzle may deposit molten plastic, or a binder may be selectively sprayed onto powder material. Through this layer-by-layer process, the cross-sectional profiles are stacked gradually until a complete three-dimensional product is formed.

Although rapid prototyping has not existed for a very long time compared with traditional manufacturing technologies, it has been adopted increasingly widely because of the major benefits it brings to product development and manufacturing efficiency. Depending on the material system and forming method used, rapid prototyping has developed into several major process types, including stereolithography, selective laser sintering, fused deposition modeling, laminated object manufacturing, three-dimensional printing, and solid ground curing.

Today, rapid prototyping plays an important role in prototype development, design verification, rapid tooling, and small-batch manufacturing, and it continues to expand its influence across many industries as materials and process technologies continue to improve.