Monitoring the effects of selective laser sintering (SLS) build parameters on polyamide using near infrared spectroscopy

Near infrared spectroscopy has been used to monitor the effects of changing build parameters on the sintering process of selective laser sintering components. The surface roughness of the parts produced has been studied whilst modifying laser scan speed and laser power build parameters. Near infrare...

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Bibliographic Details
Published in:Journal of applied polymer science 2011-09, Vol.121 (6), p.3153-3158
Main Authors: Beard, M. A., Ghita, O. R., Evans, K. E.
Format: Article
Language:English
Subjects:
Applied sciences
build parameters
Chemometrics
Construction
Exact sciences and technology
Infrared spectroscopy
Lasers
Machinery and processing
Machining
Materials science
Mathematical models
near infrared spectroscopy
Plastics
polyamide
Polymer industry, paints, wood
Polymers
Selective laser sintering
SLS
Spectra
Technology of polymers
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Summary:Near infrared spectroscopy has been used to monitor the effects of changing build parameters on the sintering process of selective laser sintering components. The surface roughness of the parts produced has been studied whilst modifying laser scan speed and laser power build parameters. Near infrared spectroscopy is shown to be a powerful tool in detecting subtle variations in the coalescence of particles that form the surface topology of the component. Principal component analysis (PCA) performed on the diffuse reflectance spectra obtained from the surface of the components shows a strong correlation between near infrared (NIR) spectra and build parameters. Using the chemometric model produced from the PCA analysis it is possible to calculate build parameters for unknown components, making NIR a useful aid for quality control of additive manufacturing technologies. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.33898