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It's time for your robot to paint ! / Scott Adams in COATINGS TECH, Vol. 19, N° 3 (03/2022)  

[article]  inCOATINGS TECH > Vol. 19, N° 3 (03/2022) . - p. 38-51 Titre : It's time for your robot to paint ! Type de document : texte imprimé Auteurs : Scott Adams, Auteur Année de publication : 2022 Article en page(s) : p. 38-51 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ateliers de peinture industrielle Revêtements -- Appareils et matériels:Peinture -- Appareils et matériels Revêtements -- Application-dosage:Peinture -- Application-dosage Robots industriels Système de pulvérisation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Adding a painting robot to a production process can bring with it improved quality and productivity. The functionality and cost of robotic paint systems has improved tremendously over the past two decades, and the technology is earning its way into small and medium-size production operations. Coating systems bring tremendous value in decorative application and functionality to products. At the same time, the industry goes to great lengths to minimize or eliminate human exposure to overspray and solvent vapors. For repetitive coating processes, a robot can be a great way to minimize human exposure, provide a stable and uniform film across months and years of production, and maximize production throughput. It is not difficult to program a robot to move along a path at a given speed and trigger a paint applicator nor is it difficult for a human to wave their arms and trigger a spray gun. Knowing how to properly configure the applicator, coordinate triggers and motions, and manage process variables is what separates a highly skilled painter from an unskilled sprayer. There can be a dozen or more interrelated factors at play during a coating application process. What seems simple on the surface has left many capable engineers and chemists wringing their hands in frustration while spraying hundreds or even thousands of test panels to find optimal application settings for their robotic application process. A trial-and-error setup approach is expensive, time consuming, and frustrating for everyone involved. Fortunately, there is a very successful and time-tested structured methodology employed by many of the coating industry’s most capable users, applicator manufacturers, robot manufacturers, and material formulators. With a data-driven and structured approach, any organization with a robot and a paint applicator can leverage these techniques to greatly reduce the time and effort required to set up a high-quality robotic painting process. There is a wealth of technical literature available on paint atomization, coating formulation, and robotic optimization. A person new to this rapidly growing field of automated paint application may find themselves overwhelmed with data or may not realize that they are reinventing wheels that were perfected long ago. This article will walk through the first and often the most complex part of a robotic application setup process, explain practical techniques, define some basic process acceptance criteria, and define typical terminology used by some of the industry’s most capable paint application specialists. Note de contenu : - Application process overview - Process considerations : Fluid-flow rate - painting tips speeds - Number of passes - Work piece geomerty - Applicator selection - Applicator testing - Spray pattern development - Static spray pattern - Testing the dynamic applicator pattern - Interpreting dynamic pattern data - Under-atomized pattern - Over-atomized pattern - Pattern shape - Normal pattern : Determining the pattern width - Index, overlaps, and offsets - What is an overlap ? : Overlap terminology - What is an offset ? - Triggers - Robot tip speed while painting - Next steps in the process En ligne : https://drive.google.com/file/d/18UBozdS6ZGKois75AkmcVQ6T4n1TDpwX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37607 [article]

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Exploring and comparing factory-applied and filed-applied coatings / Cynthia A. Gosselin in COATINGS TECH, Vol. 19, N° 3 (03/2022)  

[article]  inCOATINGS TECH > Vol. 19, N° 3 (03/2022) . - p. 56-63 Titre : Exploring and comparing factory-applied and filed-applied coatings Type de document : texte imprimé Auteurs : Cynthia A. Gosselin, Auteur Année de publication : 2022 Article en page(s) : p. 56-63 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Anticorrosion Coil coatings Métaux -- Revêtements protecteurs Revêtements en bâtiment:Peinture en bâtiment Revêtements:Peinture Spécifications Index. décimale : 667.9 Revêtements et enduits Résumé : Full disclosure : My involvement in the coatings industry centers around the field of prepainted metals. These factory-applied coatings were always fascinating to me because metal coils of all types of substrate pedigrees could be unwound onto a paint line and all the processes needed for painting completed in a matter of minutes. These processes went all the way from cleaning the surface to curing the paint, resulting in pristine coils waiting to be formed into parts for almost every market. Therefore, for purposes of this article, “factory applied” is defined as painted before forming, or prepainted. Conversely, "field-applied" refers to painting after forming-regardless of the application method or painting location. Factory-applied painting was very different from what some call “the traditional” method of applying coatings, which involves forming the parts, putting them together, and then cleaning and painting the end product. This method of painting after parts are formed could be done in an immersion or spray painting section of a facility, outsourced to another company, or painted on location during construction. Note de contenu : - Prepaint coatings attributes - The cut edge question - Building and construction - Test and verification - Environmental focus - Fig. 1 : Coil paint line schematic of a typical coil coating line. This diagram is for two layers of paint application ; some can apply three layers in one pass through the line - Fig. 2 : Schematic for a paint line coating formed and extruded products - Fig. 3 : Schematic illustration of a metallic coated substrate painted with a conversion coating (chemical pretreatment), primer and topcoat during the coil coating process - Fig. 4 : Schematic illustration of an aluminum substrate painted on a coil paint line. In this illustration, a conversion coating, primer, topcoat, and removable protective layer are applied - Fig. 5 : Comparison of cut edge corrosion performance of prepainted and postpainted hot-dip galvanized steel after 68 months of exposure at Daytona Beach - Table 1 : Testing criteria for AAMA specifications for architectural coating En ligne : https://drive.google.com/file/d/1iBPNmo5DArvsX9H1nCb_J7lqbPucNNsx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37608 [article]

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Coatings tech Vol. 19, N° 3 URL