Abstract: In order to fully utilize the fruit and vegetable skin residue, and develop a granular molding machine, this study designed a key component, die hole of the mold roll, for fruit and vegetable skin residue granule molding machine, and carried out analysis on numerical simulation of the molding process for fruit and vegetable slag granules by finite element method. The results showed that the stress was the largest at the junction between taper hole and shaped orifice and fatigue life of the die hole, while the fatigue life and safety factor were the lowest. According to the results of analysis, the structure optimization design of stress fatigue weak spot was carried out. The results showed that every performance index of the optimized die hole was improved significantly. This study provided useful references for designing fruit and vegetable skin residue granular molding machine.

Key words: fruit and vegetable skin residue, granulation, die hole, numerical simulation, optimization design

摘要： 为实现果蔬皮渣的资源化利用，研制出果蔬皮渣颗粒成型设备，对果蔬皮渣颗粒成型机关键部件模辊的模孔进行了结构设计，并以粉碎后的菠萝皮渣为压缩物料，运用有限元法对果蔬皮渣颗粒成型机压缩成型过程进行了数值模拟仿真分析，结果表明，模孔在锥形孔和成型孔交界处所受应力最大、疲劳寿命和安全系数最低。根据分析结果对应力疲劳薄弱部位进行结构优化设计，对比优化前和优化后数值模拟结果可知，优化后模孔各项性能指标都显著提升，优化效果明显，该结果为果蔬皮渣颗粒成型机的设计提供了有益参考。

关键词: 果蔬皮渣, 颗粒成型, 模孔, 数值模拟, 优化设计