How Does Powder-Based 3D Printing Work?
There are two main powder printing processes: powder bed fusion and binder jetting. With powder bed fusion, powder 3D printers either sinter or melt powder particles with a laser into the desired object layer-by-layer, while a recoating blade adds more powder for each new layer.
In place of a laser, binder jetting uses a print head that deposits a liquid bonding agent to the powder print bed. The liquid binds powder particles together to form each layer of the desired object. A fresh coat of powder is then added, and the process repeats layer by layer.