For plastic part with two_section of different screwpitch screwthread in an axle hole,their common standard pitches are different due to different size of thread.

• 对同一轴孔内有两段不同螺距的螺纹塑料制品,由于螺纹的大小不一,其常用标准螺距是不相同的,为了采用标准螺纹,便于标准件的购买,对模具结构进行了改进设计,可进行全自动生产。