It was proved by practice that the newly designed speed reducer had a good reliability and long service time, which exerted great significance for normal operation of the producing plants.

OPERATIONAL EQUIPMNT Double Winder, Die Rotating Device, Tension Auto Control System, PLC Control System, Air Shaft, Auto Unloader Device, Two or Three-Layer Coextrusion Blownand etc.

Based on analysis of malfunction of planet - gear speed reducer in rotating die system, this paper presented corresponding revamping measures, and optimized the design of its joggle parameters.