A3D打印机uses an additive manufacturing process, i.e. it manufactures an object layer by layer: either by adding material, solidifying a liquid or powder binding. Unlike conventional machine tools that make it possible to create a part by removing material through machining, this technology creates objects by adding layers of material. It reduces production times compared to conventional machining processes and provides very high precision in the production of complex shapes.
Unlike molding techniques, which require the mold to be made before material can be poured into it to manufacture the part, 3D printers work directly from a digital file that is cut into “slices” corresponding to each layer of material.