Modelagem da temperatura e otimização do índice de desplacamento de painéis de MDF envernizados em fornos UV

• Ano de defesa: 2018
• Autor(a) principal: Loyola, Fábio Soares
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Energia; UFES; Programa de Pós-Graduação em Energia
• Palavras-chave em Português: Curing temperature; Displacement of varnish; Experimental approach; Temperatura de cura; Desplacamento de verniz; Abordagem experimental; Otimização do processo de cura por ultravioleta; Modelagem da temperatura de cura; Análise das variáveis de operação do forno por meios de estatística; Processos de fabricação; Vernizes e envernizamento; Engenharia/Tecnologia/Gestão; 620.9
• Link de acesso: http://repositorio.ufes.br/handle/10/11339

Varnish curing on varnished MDF panels on an industrial scale is usually accomplished using UV kilns. Failure to adjust these ovens can lead to film overheating, causing the degradation of the lacquer. In practice, this degradation is recognized as displacement and compromises the quality of the film. In this context, the objective of this research is to evaluate the effect of radiation, convection and transport velocity of the panels on the curing temperature and ID (displacement index). The methodology used was experimental on an industrial scale, besides a mathematical approach. Considering the results and based on what the literature reports, the effect of the phenomenon of radiation on temperature is five times more important in relation to the other factors. The results showed that the effect of convection and transport velocity are inversely proportional to the increase in film temperature and displacement. The results of the heat transfer model to the concentrated parameters showed good adherence to the experimental temperature data. Optimum operating conditions (temperature of 53⁰C, ID up to 26% and ISO 3 / ASTM 2B quality standard) acceptable for UV curing can be achieved with power setting at 190 W / cm², transport speed at 18 m / min and ventilation velocity at 24 m / s.