目的 分析平口断点密封袋（又称连卷袋）包装机包覆机构的特点，设计出平口断点密封袋包装机电气控制电路。方法 利用PLC发给伺服驱动器控制指令，由伺服驱动器控制伺服电机。结果 该系统包装产品速度可达4300 个/h左右，采用该系统包装后，与人工包装相比，省时省力，包装动作标准统一，包装位置精确、美观，无折叠现象，包装特性非常优良。结论 该系统成功解决了人工包装平口断点密封袋包的难题，降低了工人的劳动强度，提高了企业生产效率。

The work aims to analyze the characteristics of the wrapping mechanism of the flat breakpoint sealing bag (also known as the roll-wrapping bag) packaging machine and design the electrical control circuit of the flat breakpoint sealing bag packaging machine. PLC was used to send the control command to the servo driver which controlled the servo motor. The system's product packaging speed could reach about 4,300 pcs/h. After the system was used for packaging, compared with the artificial packaging, both time and labor were saved, the packaging action was standard and uniform, the packaging position was accurate and aesthetic without folding, and the packaging characteristics were very good. The system successfully solves the problem of artificial packaging flat breakpoint sealing bags, reduces the labor intensity of workers and improves the production efficiency of enterprises.