Although 3D printing has covers automotive, aerospace, consumer goods, healthcare, education, architecture design, toys and other fields, but due to the limitations of printing materials, product stays at the model level. That is to say, at present the advantage of 3D printing technology mainly is to shorten the time of the design phase, make the designer's model to implement more convenient. , for example, in the traditional manufacturing process, no matter what industry, the designer's drawings, need to be broken down into individual elements, to open mould, and then assembled, its drawback that cost cycle is long. When the designer to adjust the model, it is the same steps again again, the cycle. And with 3D printing, the designer's drawings can quickly become real things, and then open mold, large-scale mass production. The meaning of 3D printing technology, the time cost savings of more lies in the design.