Influence of the layer thickness in the Fused Deposition Modeling process on the dimensional and shape accuracy of the upper teeth model

Ján Milde,Ladislav Morovič,Jakub Blaha,N Balc

doi:10.1051/matecconf/201713702006

Abstract

The article is focused on research of the influence of the layer thickness in the Fused Deposition Modeling (FDM) additive manufacturing method on shape geometrical and dimensional accuracy of parts. The digital model of the object (upper teeths) was obtained by intraoral 3D scanner 3Shape TRIOS used in dentistry. Based on the 3D (Three Dimensional) scanned digital model, the manufacturing of the upper teeths was realized on the FDM 3D printer Zortrax M200. The parts were manufactured in three different layer thicknesses. The manufactured parts was digitized by optical 3D scanner GOM ATOS Triple Scan. The dimensional and shape accuracy of the parts was evaluated in the software GOM Inspect.

Highlights

According to Békés [1], parts may be produced by adding materials, moving materials and removing materials
The aim of this article is to publish the results of the experiment “Influence of the layer thickness in the process of Fused Deposition Modeling (FDM) on dimensional and shape accuracy of the upper teeth”
The shape deviation of the upper teeth model is visualised by the colour deviation map, which is created by the comparison of the reference CAD model and the 3D digitized parts

Summary

Introduction

According to Békés [1], parts may be produced by adding materials (additive manufacturing methods), moving materials (casting technology, forming technology) and removing materials (machining technology). The layer thickness in the RP process significantly determines the printed parts quality. The aim of this article is to publish the results of the experiment “Influence of the layer thickness in the process of FDM on dimensional and shape accuracy of the upper teeth”. It is known, that in the process of injection molding and additive manufacturing of plastic materials, some plastic materials, especially ABS (Acrylonitrile - Butadiene - Styrene) are susceptible to shrinkage. The model used for the experiment was a human upper teeth, obtained by 3Shape TRIOS optical intraoral 3D scanner. The software Autodesk PowerSHAPE 2017 was used (Fig. 1.a)

Editing of the upper teeth digital model

Creating of new elements on the upper teeth model

Fused Deposition Modeling method

Layer thickness setting of the upper teeth digital model

Evaluation of the accuracy of shape and dimensions of the upper teeth

Conclusion