Laser Marking of a Small Sized QR Code on a Plastic Surface

Narica, Pavels; Fedotovs, Janis

doi:10.1007/978-3-030-44610-9_41

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…Each thermal mechanism is characterized by a temperature rise that ranges from heating, melting, and vaporization [5]- [6]. The effects of material properties (such as absorptivity and melting point) and marking parameters (such as power density, focal position and marking speed) on mark readability characteristics (such as mark contrast and mark width) are reviewed [7]- [8]. Advances in direct laser marking of plastics provide unprecedented marking quality, contrast and speed.…”

Section: Daniels Raubiška Et Al Investigating the Contrast Of Surface...mentioning

confidence: 99%

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Investigating the Contrast of Surface Marking on Different Color Connectors for Telecommunications Needs

Raubiška

Adijāns

Yankov

et al. 2023

ETR

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The development of marking technologies for telecommunications connectors requires increasingly detailed information about their applications. One solution is to use QR codes that contain sufficient information about the connectors' applications. Accurate marking of connectors requires a precise marking system, such as a laser marking system. In this study, a Rofin PowerLine F20 Varia fiber laser was used to mark four different types of ABS plastic connectors in various colors. To achieve optimal marking for all four colors, three experiments were conducted to achieve contrasting marking and high roughness. Easy QR code reading was achieved with an average marking power of 3 W to 4.2 W, a laser marking speed of 300 mm/s to 500 mm/s, and a scanning frequency of 50 kHz to 70 kHz at a constant pulse duration of 8 ns and raster spacing of 50 µm. The microstructural changes and change in roughness were determined using a laser scanning microscope (Olympus OLS5000), which revealed structural changes on the surface and an increase in relative roughness from 39% to 76%. This experiment shows that different parameters of the laser marking mode are required for each color.

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Section: Daniels Raubiška Et Al Investigating the Contrast Of Surface...mentioning

confidence: 99%

“…Sampling of the unmarked and marked area is done at an area of 11x11 pixels in order to average the measurement. The obtained values for each measured area are recalculated according to equation (8) for contrast against the background in percentages:…”

Section: Environment Technology Resources Rezekne Latvia Proceedings ...mentioning

confidence: 99%

Investigating the Contrast of Surface Marking on Different Color Connectors for Telecommunications Needs

Raubiška

Adijāns

Yankov

et al. 2023

ETR

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show abstract

“…The nature of the laser-material interaction and the quality of the laser marking are highly dependent on both the material composition and the laser settings. Some of the polymers receive additives to facilitate laser marking and improve the quality of the codes, such as PP [13], ABS [14,15], and PA [16]. Some authors have studied the performance of laser marking on the surface of polymeric materials added by nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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

Sales-Contini,

Costa,

Silva

et al. 2023

Preprint

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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.

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Laser Marking of a Small Sized QR Code on a Plastic Surface

Cited by 2 publications

References 5 publications

Investigating the Contrast of Surface Marking on Different Color Connectors for Telecommunications Needs

Investigating the Contrast of Surface Marking on Different Color Connectors for Telecommunications Needs

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

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