目的 针对目前快递行业中纸箱包装存在的效率低、人工耗费高等问题，以350 mm×230 mm×190 mm标准邮政纸箱为研究对象，设计一种半自动纸箱包装机。方法 该包装机的机械系统由托盘转动机构、开箱成型机构和折叶折曲机构组成，通过这三大机构实现纸箱的折纸包装。结果 开箱成型机构实现了纸箱的开箱、成型，折叶折曲机构实现了纸箱短叶、长叶的折合，托盘转动机构保证了包装过程中各工序之间运动的连续性。结论 该包装机能够在保证包装质量的前提下，大幅度提高包装效率、降低包装成本。

Aiming at the low efficiency and high labor cost of carton packing in express industry, the work studies the standard postal box of 350 mm×230 mm×190 mm and designs a kind of semi-automatic carton packing machine. The mechanical system of packaging machine was composed of a pallet rotary mechanism, an unfolding and shaping mechanism, and a hinge-bending mechanism to realize the carton packaging. The unfolding and shaping mechanism unfolded the carton gradually to a cuboid; the hinge-bending mechanism drove the short or long blades of the carton to turn 90 degrees; and the pallet rotary mechanism ensured the continuity between the processes in the packaging process. In conclusion, the packing machine can greatly improve the packaging efficiency and reduce the packaging cost on the premise of ensuring the packaging quality.