3D printer, also known as three-dimensional printer (3DP), is a kind of cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file and uses special wax materials and powdered materials. Adhesive materials such as metal or plastic can be used to create three-dimensional objects by printing layers of adhesive materials. Currently, 3D printers are used to manufacture products. A technology that constructs objects by printing layer by layer. The principle of a 3D printer is to put data and raw materials into the 3D printer, and the machine will create the product layer by layer according to the program.

3D printers can stack thin layers in various forms. The biggest difference between a 3D printer and a traditional printer is that the "ink" it uses is a real raw material. There are various forms of stacking thin layers, and a variety of media can be used for printing, from a variety of plastics to metals, ceramics and rubber. quasi-substance. Some printers can also combine different media, making the printed object hard on one end and soft on the other.

1. Some 3D printers use the "inkjet" method. A very thin layer of liquid plastic material is sprayed onto the mold tray using a printer nozzle, and this coating is then exposed to UV light. The mold pallet is then lowered a very small distance to allow the next layer to be stacked up.

2. Others use a technology called "fusion deposition molding". The entire process is to melt the plastic in the nozzle, and then form a thin layer by depositing plastic fibers.

3. There are also some systems that use a technology called "laser sintering" to use powder particles as the printing medium. Powder particles are sprayed onto the mold tray to form an extremely thin layer of powder, melted into the desired shape, and then solidified by the sprayed liquid adhesive.

4. Some use electron flow in vacuum to melt powder particles. When encountering complex structures including holes and cantilevers, gelling agents or other substances need to be added to the medium to provide support. Or used to occupy space. This part of the powder will not be cast, and the pores will be formed by simply flushing away the support with water or airflow.