References to the book: Additive Manufacturing Technologies: 3D Printing, Rapid

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References to the book:   Additive Manufacturing Technologies: 3D Printing, Rapid Prototyping, and Direct Digital Manufacturing 2nd ed. 2015 Edition

Problem 3: Saturation ratio (S) describes the percentage of the air space between powder particles (Vax) that is occupied by a binder volume (Vbinder). The saturation ratio is determined from Equations (1) and (2), and is based on the packing density of the powder bed (PR) and the volume of solid particles in a defined envelope (Vsoid Vbinder(1 V. air PR 100)+ Vsolid (2) air Reference: AN EXPLORATION OF BINDER JETTING OF COPPER by Yun Bai and Christopher B. Williams; osium.engr.utexas.edu/sites/default/files/201 4-063-Bai 063-Bai.pdf (p.5) (a) Calculate the required volume of binder to be printed with the above resultant saturation ratio (S) for the model below. Binder: Silica Sand wall thickness xx diameter = xx (b) List 3 factors that have influence on a high packing density on the power bed of binder jetting printers

Explanation / Answer

b) Factors that influence on high packing density on the poweder bed of binder jetting printers are

1) Size, 2) Shape, 3) Surface Texture, 4) Particle Size Distribution, 5)The method of Compaction, 6) Wall effect

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