A simplified analysis method for correlating rotary atomizer performance on droplet size and coating appearance / Kevin R. J. Ellwood in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 3 (05/2014) . - p. 303-309 Titre : A simplified analysis method for correlating rotary atomizer performance on droplet size and coating appearance Type de document : texte imprimé Auteurs : Kevin R. J. Ellwood, Auteur ; Janice L. Tardiff, Auteur ; Seyed M. Alaie, Auteur Année de publication : 2014 Article en page(s) : p. 303-309 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Atomiseurs Automobiles -- Revêtements:Automobiles -- Peinture Dépôt par pulvérisation Revêtements -- Appareils et matériels:Peinture -- Appareils et matériels Système de pulvérisation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : The dominant method of atomizing automotive paint is through the use of rotating bell sprayers. For this class of atomizer, the problem of paint thickness across the bell has been theoretically solved on a representative geometry that includes factors such as fluid flow rate, bell speed, bell cup radius, and fluid properties. It was assumed that the paint film eventually forms uniform ligaments at the bell cup edge that break due to hydrodynamic stability during the paint spray process; thus, creating a characteristic particle size distribution for the spray. These particle size distributions will vary as the spray parameters, specifically fluid flow rate, bell speed, and bell cup radius, vary. The theoretical model that has been developed strongly correlates to the literature data available for paint droplet size from rotary bell atomizers. Expansion of the correlation of the theoretical model to paint appearance wavelength measurements, Wc and Wd, in place of droplet size provides further understanding of the effect of paint spray parameters on paint appearance. Use of these correlations can help to optimize paint appearance and improve paint spray simulation results. DOI : 10.1007/s11998-013-9535-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9535-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21449 [article]

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The evolution of surface texture in automotive coatings / Cindy Peters in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 4 (07/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 4 (07/2011) . - p. 469-480 Titre : The evolution of surface texture in automotive coatings Type de document : texte imprimé Auteurs : Cindy Peters, Auteur ; Mark E. Nichols, Auteur ; Kevin R. J. Ellwood, Auteur Année de publication : 2011 Article en page(s) : p. 469-480 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Revêtements -- Texture Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : The curing behavior and texture development of automotive clearcoats was studied by noncontacting profilometry and dynamic viscosity measurements during solvent evaporation and thermal curing. The changing surface texture was shown to be a strong function of temperature and solvent content. Leveling occurred during the initial heating of the clearcoats, while smaller wavelength roughness was observed to appear during cooling after curing. The dynamic viscosity was shown to be a strong function of catalyst loading. Numerical simulations were conducted to calculate the apparent viscosity during the leveling process. Calculated viscosity profiles matched theoretical predictions for the behavior of these clearcoats. Note de contenu : EXPERIMENTAL METHODS : Materials - Rheology measurements - Surface profile - Weight loss - Spray application LEVELING MODEL : Governing equations - Boundary conditions - Finite-element formulation EXPERIMENTAL RESULTS : Modeling results DOI : 10.1007/s11998-011-9333-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9333-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12135 [article]

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