3D printing is a rapid prototyping technology, which is based on digital model files and uses adhesive materials such as powder metal or plastic to construct objects by printing layer by layer.

3D printing is usually realized by a material printer using digital technology. It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used in the direct manufacturing of some products. There are already parts printed by this technology.

3D printing technology has been applied in jewelry, footwear, industrial design, architecture, engineering and architecture (AEC), automobile, aerospace, dentistry and medical industry, education, geographic information system, civil engineering, guns and other fields.

Extended data:

Technical principle of 3D printing;

Ordinary printers used in daily life can print plane objects designed by computers, while the so-called 3D printers have basically the same working principle as ordinary printers, but the printing materials are somewhat different. The printing materials of ordinary printers are ink and paper.

3D printers contain different "printing materials" such as metal, ceramics, plastic and sand, which are real raw materials. After the printer is connected to the computer, the "printed materials" can be superimposed layer by layer through computer control, and finally the blueprint on the computer becomes a physical object.

Generally speaking, a 3D printer is a device that can "print" real 3D objects, such as robots, toy cars, various models and even food. The reason why it is popularly called "printer" refers to the technical principle of ordinary printers, because the process of layered processing is very similar to inkjet printing.

Baidu encyclopedia -3D printing