Abstract

Rheological Properties of Polyamide PA 2200 in SLS Technology

Highlights

  • Prototype production using conventional or unconventional manufacturing technologies in many cases requires obtaining a product with properties corresponding to the models that are produced

  • Models made in selective laser sintering technology with modified technological parameters were analyzed.the presented research attempts to determine the influence of two technological parameters (layer thickness in the 0.1 - 0.4 mm range and the printing direction (0° and 90°)) on stress relaxation determined during the uniaxial compression test and on the mass of models manufactured by SLS technology with PA 2200 polyamide powder

  • The state of the literature on the research of rheological and mechanical properties as well as the dimensional and shape accuracy of models produced with additive SLS technology includes many publications, in most of the work the laser parameters are analyzed omitting the thickness of the layer being built and printing direction (PD)

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Summary

INTRODUCTION

Prototype production using conventional or unconventional manufacturing technologies in many cases requires obtaining a product with properties corresponding to the models that are produced. The state of the literature on the research of rheological and mechanical properties as well as the dimensional and shape accuracy of models produced with additive SLS technology includes many publications, in most of the work the laser parameters are analyzed omitting the thickness of the layer being built and printing direction (PD). The results of the research showed that the stress relaxation of sample for selected material groups with a very good approximation can be approximated by a 3-parameter rheological model-standard 1. Due to the fact that SLS technology uses a number of materials reinforced with, for example, glass fibre or aluminium powders, the research presented in this publication, which analyzes the influence of the layer thickness and the printing direction on stress relaxation and the mass of produced models, can be used for the other group of materials and seems reasonable. It seems important to find a consensus between rheological properties and the mass of the produced models, which allows building models with satisfactory rheological properties and reduced mass, so important in the automotive and aerospace industry

MATERIALS AND METHODS
Findings
CONCLUSIONS

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