Start Date

5-2020 12:00 AM

Description

Binder Jetting (BJ) is a low-cost Additive Manufacturing (AM) process that uses inkjet technology to selectively bind particles in a powder bed. The interaction of the binder droplets with the powder is essential to the process. This is a complex interaction in which picoliter-sized droplets impact powder beds at velocities of approximately 10 m/s. The binder partially fills the voids between the powders. The fraction of void space filled with binder is the saturation and is a key parameter in BJ. The effects of printing parameters such as droplet velocity, size, and spacing on saturation levels are unknown. This study analyses the influence of these parameters on the effective saturation level when printing single lines into powder beds of varied materials (316 Stainless steel, 420 stainless steel, and alumina) and varied particle size (d₅₀= 10-47 microns). Results show that increasing droplet velocity or droplet spacing decreased effective saturation.

Comments

Due to COVID-19, the Symposium was not able to be held this year. However, papers and posters were still submitted.

Available for download on Saturday, May 01, 2021

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May 1st, 12:00 AM

Assessing the Impact of Drop Velocity and Spacing in Binder Jetting to Improve Printing in Novel Powders and New Environments

Binder Jetting (BJ) is a low-cost Additive Manufacturing (AM) process that uses inkjet technology to selectively bind particles in a powder bed. The interaction of the binder droplets with the powder is essential to the process. This is a complex interaction in which picoliter-sized droplets impact powder beds at velocities of approximately 10 m/s. The binder partially fills the voids between the powders. The fraction of void space filled with binder is the saturation and is a key parameter in BJ. The effects of printing parameters such as droplet velocity, size, and spacing on saturation levels are unknown. This study analyses the influence of these parameters on the effective saturation level when printing single lines into powder beds of varied materials (316 Stainless steel, 420 stainless steel, and alumina) and varied particle size (d₅₀= 10-47 microns). Results show that increasing droplet velocity or droplet spacing decreased effective saturation.