3D printer, a machine for rapid prototyping technology, is a digital model file based on a technique of constructing an object by layer-by-layer printing using a bondable material such as powdered metal or plastic. In the past, it was often used in the manufacture of molds in the fields of mold manufacturing and industrial design. It is now being used for the direct manufacture of some products, which means that this technology is becoming popular.
Its principle is: put the data and raw materials into the 3D printer, the machine will build the product layer by layer according to the program. The printed product can be used immediately.