Effect of Orientation Angle on Surface Quality and Dimensional Accuracy of Functional Parts Manufactured by Multi Jet Fusion Technology

Abstract

Multi Jet Fusion is one the new Additive Manufacturing method which belongs to powder bed fusion technology class and used for additive manufacturing of polymer based parts. There are restricted number of research about this developing technology. In this study, it is aimed to investigate the effect of build orientation angle on surface quality and dimensional accuracy of the printed bolts as functional parts. Samples were manufactured in two different build orientations such as 90 and 45 degrees. Surface quality and dimensional properties of the bolt tooth such as tooth height, tooth angle and distance between two teeth were inspected by optical and tactile precision measurement systems. The results were evaluated by comparing the measurement data with each other for two different sample groups and also with nominal design data. For determining the significance of the difference between two sample groups and nominal data the results were also evaluated by Student's t-test statistical analysis. The results revealed that, orientation angle had significant effect on surface roughness, tooth height and tooth angle but it didn't affect the distance between two teeth.

Impact of print bed build location on the dimensional accuracy and surface quality of parts printed by multi jet fusion

“…Multi Jet Fusion (MJF) is relatively newly developed, polymer based additive manufacturing (AM) processing technique, which was developed by Hewlett-Packard (HP) [1]. It belongs to the powder bed fusion (PBF) technology sub group, which also includes techniques such as binder jetting and selective laser sintering (SLS) [1,2].…”

“…Multi Jet Fusion (MJF) is relatively newly developed, polymer based additive manufacturing (AM) processing technique, which was developed by Hewlett-Packard (HP) [1]. It belongs to the powder bed fusion (PBF) technology sub group, which also includes techniques such as binder jetting and selective laser sintering (SLS) [1,2]. Compared with SLS and binder jetting, the MJF technique is reported to offer the advantages of high productivity and low cost per unit volume, in terms of energy and material consumption [3].…”

“…The IR energy source passes over the powder on the build plate and sinters the areas where the fusing agent was deposited and leaves the rest of the powder unaltered. The process is repeated until all parts are fabricated [1,5]. The fusing agent contains carbon black, which makes the white polymer powder more light absorbing.…”

“…This facilitates 80% powder re-use to the next printing process, thus facilitating greater processing sustainability [10]. The most widely used polymer with the MJF processing is polyamide (PA), which is a semicrystalline, thermoplastic polymer [1]. It is selected due to its relatively high mechanical strength, low melt viscosity [4], high impact resistance and low moisture absorbance.…”

Study on Geometry, Dimensional Accuracy and Structure of Parts Produced by Multi Jet Fusion

“…The results of various studies show that the orientation of parts and the heat distribution in the process may strongly affect the geometrical and dimensional accuracy of prints [20,21,27,31]. For powder bed fusion processes, including SLS (Selective Laser Sintering), MJF (Multi Jet Fusion) and 3DP (Three-Dimensional Printing) [22,26,28,32,33]. The orientation in the print chamber is also considered as one of the main factors affecting the accuracy of parts together with the print volume.…”