Ordinary printers used in daily life can print flat objects designed by computers, and the so-called 3D printers work basically the same as ordinary printers, but the printing materials are slightly different. The printing materials of ordinary printers are ink and paper, while 3D printers are equipped with metal , ceramics, plastics, sand and other different "printing materials" are real raw materials. After the printer is connected to the computer, the "printing materials" can be superimposed layer by layer through computer control, and finally the blueprint on the computer becomes real.

3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing. It is a digital model file based, using powder metal or plastic and other bondable materials to construct layer by layer printing. object technology.