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Abstract(s)
Para realizar a vulcanização de um pneu é necessário que exista enxofre e calor. A necessidade de calor no processo leva a gastos avultados com a energia gasta no aquecimento de moldes. A empresa Continental Mabor-Indústria de Pneus S.A. (CMIP) dedica-se à produção de pneus para veículos ligeiros de passageiros, veículos ligeiros de mercadorias e mais recentemente nos pneus para veículos agrícolas. Para o fabrico destes artigos a CMIP utiliza prensas hidráulicas e mecânicas com o aquecimento dos moldes a vapor saturado. O projecto aqui elaborado estuda o comportamento do aquecimento do molde antes de entrar em produção. Este estudo vai utilizar conceitos de Transferência de Calor de forma a elaborar um modelo teórico que preveja a evolução das temperaturas durante o aquecimento dos moldes que existem na CMIP; o objectivo primeiro do trabalho é precisamente este. Durante o projecto fizeram-se testes a diferentes tamanhos de molde durante o seu aquecimento em diferentes dipositivos existentes. A par dos testes, foi feito um estudo teórico dos diferentes modos de transferência de calor de forma a encontrar uma aproximação entre o real e o teórico. Na fase final do trabalho fizeram-se recomendações para diminuir o tempo de aquecimento moldes nas prensas, o que será o segundo objectivo do trabalho. Estas mesmas recomendações foram testadas de forma a comprovar a diminuição de tempo.
For vulcanization of a tire is necessary sulphur and heat. This necessity of heat in the process creates a high cost with steam consumption for heating moulds. The Continental Mabor – Indústria de Pneus S.A produces tires for passenger vehicles, light trucks and, most recently, agriculture tires. To manufacture these tires, CMIP uses hydraulic and mechanical press with saturated steam for heating moulds. This project studies the behaviour of heating moulds before the moulds go into production. This study will use heat transfer concepts to predict the evolution of the temperature during the heating of moulds that exist in CMIP; the main scope of this study is this. During the project, different moulds and container sizes were tested during their heating in different places. Along with the tests, was made a theoretical study about different heat transfers modes to find a good approach between the theory and reality. In the final phase, are made recommendations to decreased mould heating time in presses, which will be the second scope of this study. These recommendations were tested to prove this decrease of time.
For vulcanization of a tire is necessary sulphur and heat. This necessity of heat in the process creates a high cost with steam consumption for heating moulds. The Continental Mabor – Indústria de Pneus S.A produces tires for passenger vehicles, light trucks and, most recently, agriculture tires. To manufacture these tires, CMIP uses hydraulic and mechanical press with saturated steam for heating moulds. This project studies the behaviour of heating moulds before the moulds go into production. This study will use heat transfer concepts to predict the evolution of the temperature during the heating of moulds that exist in CMIP; the main scope of this study is this. During the project, different moulds and container sizes were tested during their heating in different places. Along with the tests, was made a theoretical study about different heat transfers modes to find a good approach between the theory and reality. In the final phase, are made recommendations to decreased mould heating time in presses, which will be the second scope of this study. These recommendations were tested to prove this decrease of time.
Description
Keywords
Transferência de calor Vulcanização Aquecimento de Moldes Heat transfer Vulcanization Mold heating