1, 3D printing (3DP) is a rapid prototyping technology, also known as additive manufacturing. It is a technology based on digital model file, using adhesive materials such as powder metal or plastic, and constructing objects by printing layer by layer.

2.3D printing is usually realized by digital technology material printer. 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. Parts already printed with this technology. This technology has been applied to jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobile, aerospace, dentistry and medical industry, education, geographic information system, civil engineering, guns and other fields.

On March 20th1965438+1October14th, the University of California, San Diego made a spinal cord scaffold imitating the structure of the central nervous system for the first time, which successfully helped rats recover their motor function.

4. On May 5, 2020, a "3D printer" was carried on the Long March 5 B carrier rocket and successfully made its first flight in China. This is the first space 3D printing experiment in China and the first space 3D printing experiment of continuous fiber reinforced composites in the world.