目的 介绍一种封口机上的新型旋转式分盖装置。方法 首先通过对分盖动作的介绍， 详尽分析该装置的结构组成及工作原理。然后对刀盘进行设计， 确定其关键参数。最后对装置进行运动仿真，验证其是否满足设计要求。结果 经过仿真分析， 上下刀盘边缘切刀切入点在分盖过程中始终相距约10°， 与刀盘边缘切刀外形设计相符， 能够成功地实现分盖功能。结论 该装置稳定性好、 结构简单，经实际使用证明达到了设计要求。

A new type of rotary points cover device for sealing machine was introduced in this paper. First, its structure and working principle were analyzed in detail through the introduction of the motion of covers separation. Then the cutter design was carried out and the key parameters were determined, and finally, motion simulation was performed for the device to prove whether it met the design requirements. Though simulation analysis, the breakthrough point of the upper and lower cutter edges always had a distance of about 10° in the process of covers separation, which conformed to the cutter shape, and the function of covers separation could be successfully achieved. The device was characterized by good stability and simple structure, and it met the design requirements as proved by actual using.