Key Parameter Design and Experimental Analysis for Peelable Seedling Belts in Sweet Potato Transplanting Systems

文献类型： 外文期刊

第一作者： Wei, Youhao

作者： Wei, Youhao;Li, Kun;Hu, Minjuan;Qi, Bing;Ji, Yao;Zhang, Wenyi;Yan, Wei

作者机构：

关键词： sweet potato seedlings; LDPE seedling belts; heat sealing; orthogonal experiment; peeling strength

期刊名称：APPLIED SCIENCES-BASEL （ 影响因子：2.5； 五年影响因子：2.7 ）

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年卷期： 2024 年 14 卷 23 期

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收录情况： SCI

摘要： Sweet potato is essential for food security, but its transplanting efficiency is currently low. To improve this, we developed a belt-type transplanter that uses seedling belt technology for automated feeding, increasing efficiency by over 25%. The use of the seedling belt is key to significantly enhancing the transplanter's efficiency. Building on seedling belt feeding, we designed a "trumpet-shaped" staggered detachable seedling belt using LDPE film. Seedlings are fixed at intervals between two film layers via thermal bonding points. Mechanical analysis showed the optimal peeling strength is 13.2 N, ensuring smooth seedling transport during transplanting. Peeling strength depends on the heat sealing temperature, time, and pressure. To optimize these parameters, we designed an experimental device and conducted single-factor experiments to determine their effects on the peeling strength and establish reasonable ranges. Results show that, at a peeling strength of 13.2 N, the thermal bonds separate smoothly without tearing the film. A three-factor, three-level orthogonal experiment further optimized the heat sealing parameters, concluding that, at 140 degrees C, 1.2 s, and 0.4 MPa, the average peel force of the seedling tapes obtained from the experiments was 14.31 N, at which point the peeling effect was optimal.

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