A new method of using the epicyclic-train theory to the machining of the interrupted screw thread on the mould core was introduced, which has been verified in practice.

• 瓶盖类塑件上的螺纹常采用断续螺纹,其模具型芯的加工较困难,现介绍一种利用周转轮系理论完成模具型芯上断续螺纹加工的新方法,此方法已在实践中得到验证。