For over 20 years, ExOne has been a global leader in Additive Manufacturing, providing 3D printing machines, 3D printed products and related services to customers in a variety of industries including: pumps/valves, automotive, aerospace, energy, heavy equipment, and general industry. The ExOne process, which utilizes a binder jetting technology, selectively jets binder onto a powdered material bed and builds parts from a 3D CAD file layer by layer.
The key benefits of binder jetting include: highest volumetric output (cm3/hr) versus alternative technologies; scalability of process to high production volumes; diversity of powder materials that can be printed; diverse range of part sizes – small intricate MIM parts to large multi-segment sand castings.
ExOne’s corporate headquarters is in North Huntingdon, PA with manufacturing operations in the United States and Germany. Production service and adoption centers are located in the United States, Germany, and Japan.
Visit Us at RAPID + TCT 2019
Technical Challenges in Scaling Binder Jet 3D Printing
Date(s): 05/23/2019, 11:00 AM
Director of R&D at ExOne
Though binder jet 3D printing has been used to produce metal parts for over 20 years, it only recently gained significant traction as a production technology. In addition to established companies like Digital Metal and ExOne, Hewlett-Packard, Desktop Metal and General Electric have all announced their intention to build a binder jet 3D printer. The new excitement in binder jetting is in part being driven by the similarities with a proven manufacturing technology called metal injection molding (MIM). ExOne utilizes powders and furnaces that are traditionally used in the MIM industry. By using MIM powders, binder jetting can leverage the supply chain and sintering knowledge of a more established industry. This has allowed parts to be produced that exceed MPIF Standard 35 properties with surface finishes as fine as 3µm Ra in materials such as 316L and 17-4PH.
Despite the success in producing parts on small printers, there is a need to scale the technology to be able to print larger parts for molding applications and large quantities of smaller parts. While the MIM and powder metallurgy industries can assist in the sintering of these parts, the printers themselves need to be optimized to print repeatable and consistent parts. This presentation will highlight some of these challenges including a discussion on optimizing spread speed vs green density, uniformity vs green density, experimental spreading and compaction techniques and novel jetting approaches.
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