ASTM Worldwide’s additive manufacturing committee (F42) is growing a proposed customary (WK94968) that goals to assist outline the printability vary of cementitious supplies for ‘any given extrusion-based 3D printer.’
WK94968 is underneath improvement throughout the committee’s check strategies subcommittee (F42.01).
In line with ASTM member Reza Foruzanmehr, the brand new customary addresses an present hole by offering a check methodology that can determine the compatibility zone between cementitious mixtures and 3D printing extrusion programs when it comes to optimum rheological properties.
“Contemplate the instance of a piping bag used for adorning muffins. If the cream inside is simply too stiff, it won’t come out. Whether it is too runny, it won’t maintain its form,” mentioned Foruzanmehr, Affiliate Professor within the Division of Civil Engineering on the College of Ottawa. “The dimensions and form of the nozzle, in addition to the drive utilized to squeeze the bag, additionally have an effect on the end result.”
The usual defines the minimal and most values of yield stress and viscosity, inside which cementitious supplies may be reliably extruded whereas sustaining printability elements, with out requiring entry to costly and time-consuming rheometric checks.
Foruzanmehr notes that by offering a reproducible and accessible method to evaluating materials printability, the usual helps optimised combine design, correct printer calibration, and constant high quality management for extrusion-based 3D printing programs.
This effort instantly pertains to the United Nations Sustainable Improvement Aim #11 on Sustainable Cities and Communities, #9 on Trade, Innovation, and Infrastructure, and #12 on Accountable Consumption and Manufacturing.
Earlier this week, ASTM Worldwide’s Wohlers Associates crew sat down with TCT to discover the important thing findings of this yr’s Wohlers Report, the way it has transitioned into ASTM Worldwide after the 2021 acquisition, and what goes into the event of the report.
