Thermoplastic composites play an increasingly important role in lightweight design. The composite industry employs several production techniques for thermoplastic composite parts. A novel approach utilizes a fully automated thermoplastic composite production cell which consists of five processing steps: (a) tape laying, (b) consolidation, (c) preheating, (d) forming, and optionally, (e) overmolding. To optimize process efficiency of the manufacturing chain and increase product quality it is important to gain real-time information of the quality of the intermediates between each processing step. This holds particularly for the preheated plate prior to injection molding. We developed an inline quality inspection method for the preheated part, including (a) a passive thermography camera for the measurement of thermal images and (b) a statistical data analysis approach to predicting critical quality attributes from the pictures. Several experiments with different set temperatures were performed using an industrial-scale infrared oven with consolidated plates made from polycarbonate and carbon fibers. To test our quality inspection approach, we used consolidated plates of different input qualities. The experiments confirmed the usefulness of the approach to assessing the process stability of the preheating step and the quality of the preheated plates.
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8 May 2024
PROCEEDINGS OF THE 38TH INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY (PPS-38)
22–26 May 2023
St. Gallen, Switzerland
Research Article|
May 08 2024
Inline quality measurement of preheated thermoplastic composite parts using passive thermography
Janos Birtha;
Janos Birtha
a)
1
Competence Center CHASE GmbH
, Altenberger Strasse 69, 4040, Linz Austria
a)Corresponding author: [email protected]
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Eva Kobler;
Eva Kobler
1
Competence Center CHASE GmbH
, Altenberger Strasse 69, 4040, Linz Austria
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Christian Marschik;
Christian Marschik
1
Competence Center CHASE GmbH
, Altenberger Strasse 69, 4040, Linz Austria
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Klaus Straka;
Klaus Straka
2
Johannes Kepler University Linz, Institute of Polymer Injection Molding and Process Automation
, Altenberger strasse 69, 4040 Linz, Austria
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Georg Steinbichler;
Georg Steinbichler
2
Johannes Kepler University Linz, Institute of Polymer Injection Molding and Process Automation
, Altenberger strasse 69, 4040 Linz, Austria
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Sven Schlecht;
Sven Schlecht
3
Covestro Deutschland AG
, Kaiser-Wilhelm-Allee 60, 51373 Leverkusen, Germany
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Paul Zwicklhuber
Paul Zwicklhuber
4
ENGEL AUSTRIA GmbH
, Ludwig-Engel-Straße 1, 4311 Schwertberg, Austria
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a)Corresponding author: [email protected]
AIP Conf. Proc. 3158, 130002 (2024)
Citation
Janos Birtha, Eva Kobler, Christian Marschik, Klaus Straka, Georg Steinbichler, Sven Schlecht, Paul Zwicklhuber; Inline quality measurement of preheated thermoplastic composite parts using passive thermography. AIP Conf. Proc. 8 May 2024; 3158 (1): 130002. https://doi.org/10.1063/5.0204556
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