3D printing technology appeared in the mid-1990s and was actually the latest rapid prototyping device using technologies such as photo-curing and paper lamination。It is basically the same as the normal printing working principle。The printer is filled with "printing material" such as liquid or powder, and after being connected with the computer, the "printing material" is layered by computer control, and finally the blueprint on the computer is turned into a kind. This printing technology is called 3D printing technology。
　　3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on a digital model file and uses a powdery metal or plastic adhesive material to build an object by layer-by-layer printing。
　　There are many different technologies for 3D printing. What makes them different is that they are created in different layers using the available materials. The commonly used materials for 3D printing include nylon glass fiber, durable nylon material, gypsum material, aluminum material, titanium alloy, stainless steel, silver plating, gold plating, and rubber materials。
　　3D printing is usually implemented using digital technology material printers. Often used in mold manufacturing, industrial design and other fields are used to manufacture models,and then gradually used in the direct manufacture of some products,there are already printed components using this technology。The technology has applications in jewellery, footwear,industrial design,construction,engineering and construction(AEC),automotive,aerospace,dental and medical industries,education, geographic information systems, civil engineering, firearms, and other fields。
　　In layman's terms,a 3D printer is a device that can "print" a real 3D object, such as printing a robot,printing a toy car,printing various models,or even food. The reason why it is popularly referred to as "printer" refers to the technical principle of ordinary printers,because the process of layering is very similar to inkjet printing。This printing technology is called 3D printing technology。