This article introduces the technology of trimming the aditus department of the thin-wall barrel-type piece based on the principles of transversal truncation about the polyurethane rubber.

• 基于聚氨脂橡胶横向截切原理介绍了薄壁筒形件口部修边的工艺方法,根据其剪切机理研制了修边模具,叙述了模具结构及主要工作零件的设计。