|About this Abstract
||Materials Science & Technology 2020
||Additive Manufacturing: Qualification and Certification
||Influence of Printing Parameters within the Binder-powder Interaction
||Trenton Colton, Nathan Crane
|On-Site Speaker (Planned)
The understanding of binder-powder interaction is crucial to the advancement of several additive manufacturing processes (AM) most notably binder jetting. Attempts have been made to predict saturation levels of parts with simple calculations based on droplet primitives and/or capillary pressure. These methods have lacked clear predictive ability and neglect crucial aspects of printing parameters. The capability of AM to improve depends on this dynamic droplet/powder interaction as the interaction influences dimensional accuracy, print time, and green part strength. Understanding the underlying physics will decrease needed resources for new material implementation in binder jetting. This study reports on the impact of heating and drop velocity, spacing, and interarrival time on the effective binder saturation levels of lines, layers, and multilayer parts. The results show that velocity and droplet size have a strong impact on the effective saturation of a part. However, drying reduces sensitivity of the process to the process parameters.