Development of withering machine for fresh tea leaves manufacturing using vibration

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  • 振動を利用した茶生葉萎凋機の開発

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Abstract

Miyazaki agricultural experiment station has succeeded in producing a unique oolong tea by using fresh tea leaves of green tea varieties. In the manufacturing process of oolong tea, indoor withering is the most important to bringing out a distinctive color and aroma of tea. The purpose of this study is to develop a withering machine for fresh tea leaves manufacturing using vibration. First, the small-size prototype has been developed to verify the effect of vibration on tea leaves, and it was proven that the excitation force is available for withering the leaves moderately. And then the large-size prototype has been developed for the practical use of the withering machine. The results of a verification experiment confirmed that the prototype developed can vibrate about 10 kilograms of tea leaves at the same time. In addition, the conditions for uniform vibrating the tea leaves were experimentally examined.

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