Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of Laser Marking Parameters in The DMC Code Quality on the PBT/Glass Fibre Composite Surface Using SEM

Rita Sales-Contini
,
João Costa
,
Francisco Silva
ORCID logo ,
Arnaldo Pinto
ORCID logo ,
Raul Campilho
,
Rui Martinho
* ORCID logo ,
Isabel Pinto
,
Vitor Sousa
Version 1 : Received: 23 October 2023 / Approved: 24 October 2023 / Online: 25 October 2023 (08:13:27 CEST)

How to cite: Sales-Contini, R.; Costa, J.; Silva, F.; Pinto, A.; Campilho, R.; Martinho, R.; Pinto, I.; Sousa, V. Influence of Laser Marking Parameters in The DMC Code Quality on the PBT/Glass Fibre Composite Surface Using SEM. Preprints 2023, 2023101529. https://doi.org/10.20944/preprints202310.1529.v1 Sales-Contini, R.; Costa, J.; Silva, F.; Pinto, A.; Campilho, R.; Martinho, R.; Pinto, I.; Sousa, V. Influence of Laser Marking Parameters in The DMC Code Quality on the PBT/Glass Fibre Composite Surface Using SEM. Preprints 2023, 2023101529. https://doi.org/10.20944/preprints202310.1529.v1

Abstract

Laser marking on polymer composite surfaces can be difficult to contrast and cause readability problems for electronic decoding equipment on production lines due to poor interaction between the laser and the fibres used to reinforce these materials. This problem can be solved with the right choice of marking parameters, resulting in savings for companies by avoiding production problems such as rejection, scrap and customer complaints. The present work uses the PBT/glass fibre composite used in the manufacture of instrument panels for motorcycles. The tests were carried out with different laser marking parameters using a Nd: YAG laser. Subsequently, the laser-marked DMC codes were analysed using a Verifier to evaluate the quality according to the ISO/IEC 29158:2020 standard. A detailed analysis of these surfaces was also carried out to observe some physical and chemical changes using SEM microscopy and EDS spectroscopy. The optical analysis showed that the lower the radiation power and pulse frequency and the higher the marking speed, the weaker the laser marking and therefore the poorer the DMC code quality, which was confirmed by the SEM. EDS spectroscopy showed that the laser marking process did not affect the chemical changes on the sample surface.

Keywords

Laser Marking Quality; Marking Parameters; DMC code; PBT composite; SEM analysis

Subject

Engineering, Mechanical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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