This paper describes an innovative system to make writings or patterns on painted or unpainted metallic surfaces by diode laser cure of thermosetting powders. The process is very interesting to personalize objects such as automotive components and others. An electrostatic deposition of commercial thermosetting powder is performed on metallic surfaces, the laser beam passes on the deposited powder following a fixed path and cures it. A process map was found in terms of laser power and scan speed. The laser power is in the range 55–70 W for a scan speed of 1 or 2 mm/s in the case of metallic surfaces, while the power is in the range 35–50 W for the same scan speeds in the case of painted surfaces. Visual inspection and scratch tests were performed in order to evaluate the aspect and the adhesion to the substrate. Very good results were found demonstrating that the diode laser is a useful tool to make writing.
Santo, L., Tagliaferri, V., Trovalusci, F. (2009). Diode laser cure of thermosetting powders for writing on painted and unpainted metallic surfaces. In Dynamic Thermal Thin Film Processing of Large Areas With High Power Laser Sources High power laser sources are used in various production tools for cutting, welding and hardening of metal parts and patterning, annealing and lithography of flat panel displays, solar cells and microe... Modeling of Thermoelastic Stress Wave in Laser-Assisted Cell Direct Writing Laser-assisted cell direct-write technique has been a promising biomaterial direct-write method. For safe and reproducible cell direct writing, the cell damage due to process-induced external stress m... ASME Conf. Proc. ASME 2009 International Manufacturing Science and Engineering Conference (pp.701-704). American Society of Mechanical Engineer [10.1115/MSEC2009-84242].
Diode laser cure of thermosetting powders for writing on painted and unpainted metallic surfaces
SANTO, LOREDANA;TAGLIAFERRI, VINCENZO;TROVALUSCI, FEDERICA
2009-01-01
Abstract
This paper describes an innovative system to make writings or patterns on painted or unpainted metallic surfaces by diode laser cure of thermosetting powders. The process is very interesting to personalize objects such as automotive components and others. An electrostatic deposition of commercial thermosetting powder is performed on metallic surfaces, the laser beam passes on the deposited powder following a fixed path and cures it. A process map was found in terms of laser power and scan speed. The laser power is in the range 55–70 W for a scan speed of 1 or 2 mm/s in the case of metallic surfaces, while the power is in the range 35–50 W for the same scan speeds in the case of painted surfaces. Visual inspection and scratch tests were performed in order to evaluate the aspect and the adhesion to the substrate. Very good results were found demonstrating that the diode laser is a useful tool to make writing.Questo articolo è pubblicato sotto una Licenza Licenza Creative Commons
