TY - GEN
T1 - POWDER-BINDER INTERACTION IN BINDER JETTING PROCESS
T2 - ASME 2023 18th International Manufacturing Science and Engineering Conference, MSEC 2023
AU - Shahed, Kazi Safowan
AU - Manogharan, Guha
N1 - Publisher Copyright:
Copyright © 2023 by ASME.
PY - 2023
Y1 - 2023
N2 - Binder Jetting (BJT) is a room-temperature powder-bed additive manufacturing process suitable for a wide range of materials such as bioceramics, sand, metals, and polymers. In this process, powder-binder interaction, which is influenced by the powder bed packing density during the printing process, has a major impact on the overall part quality. Although few recent studies have explored the modeling of the binder-jetting process, they are not realistic (e.g., 200 % larger droplet size when compared to the actual process). This study is the first to report a systematic study into the powder-binder interactions for bimodal powders with actual binder-jetting conditions across a wide range of packing densities and binder-jetting conditions. This integrated Discrete Element Modeling (DEM - powder spreading) – VOF (Volume of Fluid - binder interaction) study analyzed the powder-binder interaction in terms of: penetration depth, spreading time, and area per droplet on the powder bed. It was observed that an increase in droplet velocity resulted in deeper penetration (5.4%) of the binder but reduced the area of spread (20.8%) across packing densities. In addition, for a given droplet size and packing density, an increase in droplet velocity resulted in a shorter spreading time (27.3%). Findings from this study provide a new understanding of the temporospatial characteristics of the binder-powder interaction, which helps in identifying optimal printing parameters for a bimodal powder feedstock.
AB - Binder Jetting (BJT) is a room-temperature powder-bed additive manufacturing process suitable for a wide range of materials such as bioceramics, sand, metals, and polymers. In this process, powder-binder interaction, which is influenced by the powder bed packing density during the printing process, has a major impact on the overall part quality. Although few recent studies have explored the modeling of the binder-jetting process, they are not realistic (e.g., 200 % larger droplet size when compared to the actual process). This study is the first to report a systematic study into the powder-binder interactions for bimodal powders with actual binder-jetting conditions across a wide range of packing densities and binder-jetting conditions. This integrated Discrete Element Modeling (DEM - powder spreading) – VOF (Volume of Fluid - binder interaction) study analyzed the powder-binder interaction in terms of: penetration depth, spreading time, and area per droplet on the powder bed. It was observed that an increase in droplet velocity resulted in deeper penetration (5.4%) of the binder but reduced the area of spread (20.8%) across packing densities. In addition, for a given droplet size and packing density, an increase in droplet velocity resulted in a shorter spreading time (27.3%). Findings from this study provide a new understanding of the temporospatial characteristics of the binder-powder interaction, which helps in identifying optimal printing parameters for a bimodal powder feedstock.
UR - https://www.scopus.com/pages/publications/85176748686
UR - https://www.scopus.com/pages/publications/85176748686#tab=citedBy
U2 - 10.1115/msec2023-104366
DO - 10.1115/msec2023-104366
M3 - Conference contribution
AN - SCOPUS:85176748686
T3 - Proceedings of ASME 2023 18th International Manufacturing Science and Engineering Conference, MSEC 2023
BT - Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering
PB - American Society of Mechanical Engineers
Y2 - 12 June 2023 through 16 June 2023
ER -