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A Novel Semiautomatic Flesh Peeling and Seed Removing Mechanism for Dried Longan

Author

Listed:
  • Cheng-Han Li

    (Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung 402, Taiwan)

  • Yu-Ting Hsu

    (Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung 402, Taiwan)

  • Chun-Hung Hsieh

    (Department of Information Management, National Taichung University of Science and Technology, Taichung 404, Taiwan)

  • Ching-Wei Cheng

    (College of Intelligence, National Taichung University of Science and Technology, Taichung 404, Taiwan)

Abstract

Longans, which are produced in tropical countries, are rich in nutrients and high in commercial value. To extend their shelf life, fresh longans are roasted to dry them out. For the convenience of cooking applications, the dried longan pulp is peeled and seeded beforehand. Presently, this is done manually; thus, this research aims to automate this process. A cutting tool with a serrated bending angle is used to cut the dried longan pulp, and then the longan is fixed by a lifting mechanism. The pulp is breached with a cutting tool and this breach is pushed up against a 6 mm hole in the silicone soft plate of the lifting mechanism to separate out the seed by squeezing. Commercially available dried longans are used in this experiment. The cutting surface width of the cutter designed in this study is 20 mm, and the serration bending angle is 30°. This cutter operates at a speed of 29 cm/s on dried longan pulp, attaining a success rate of 85%. The lifting mechanism also presented in this study fixes the dried longan and uses a squeezing motion to separate the flesh from the seed with a silicone soft plate. Here, a lifting speed of 28 mm/s achieves the highest rate of success at peeling, and the success rate of pulp-and-seed separation can reach 86.7%.

Suggested Citation

  • Cheng-Han Li & Yu-Ting Hsu & Chun-Hung Hsieh & Ching-Wei Cheng, 2021. "A Novel Semiautomatic Flesh Peeling and Seed Removing Mechanism for Dried Longan," Agriculture, MDPI, vol. 11(1), pages 1-11, January.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:1:p:48-:d:477789
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    References listed on IDEAS

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    1. Tippayawong, N. & Tantakitti, C. & Thavornun, S., 2008. "Energy efficiency improvements in longan drying practice," Energy, Elsevier, vol. 33(7), pages 1137-1143.
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