“What is Binder Jetting in 3D Printing

The binder jetting 3D printing process involves depositing an adhesive binder onto thin layers of powdered material. These materials can be ceramic-based, like glass or gypsum, or metal, such as stainless steel.

During the printing process, the 3D print head moves over the build platform, depositing droplets of binder, similar to how a 2D printer applies ink to paper. Once a layer is completed, the powder bed lowers, and a new layer of powder is spread over the build area. This layering continues until the entire object is printed.

After printing, the parts are in an unfinished, or "green," state and require further post-processing. To enhance the mechanical properties of the parts, an infiltrate substance, such as cyanoacrylate adhesive for ceramics or bronze for metals, is often added. Another method involves placing the green parts in an oven to sinter the material grains together.

Interestingly, the term "3D printing" originally described a process that used inkjet-like heads to deposit binder material onto a powder bed layer by layer.”