The invention relates to the field of cup
automation, and discloses a cup rim
processing technology which comprises the following steps: a,
assembly line feeding: putting cup bodies on an
assembly line capable of conveying the cup bodies in a stepping manner; b, cup body opening
necking is conducted, specifically, to-be-machined cup bodies on an
assembly line are placed on a cup opening
necking device through a feeding and discharging device, and threads are driven to be formed on cup body openings; c, material changing is conducted through the
necking device, and through the feeding and discharging device, the positions of the cup bodies to be machined on the
assembly line and the positions of the cups with the necked inner cup openings in the necking device are exchanged; d,
assembly line conveying is conducted, specifically, the
assembly line conveys the cup with the necked cup opening to the next procedure, and the cup body to be machined is aligned with cup opening necking equipment; and e, cup mouth
cutting is conducted, specifically, the
water flow line is conveyed to the cup mouth
cutting device, and the cup mouth of the cup subjected to cup mouth necking is
cut through the cup mouth
cutting device. The cups on the assembly line and the
machining equipment are exchanged through the feeding and discharging device, and the working efficiency is improved.