This invention relates to the field of cup rim
spinning technology, and discloses a cup rim
spinning device for insulated cups, including a mounting frame, a rotating base, a horizontal plate, a first cylinder, a
drive motor, a U-shaped bracket, and a
spinning disc mounted on the mounting frame. It also includes a precision spinning mechanism disposed on the horizontal plate, comprising a fixed sleeve, an
extrusion shaft slidably disposed within the fixed sleeve, and a pressure plate fixed to the
extrusion shaft via a cross-shaped connecting plate. Through the cooperation of the
extrusion shaft, pressure plate, pressure cap, first ball bearings, ring plate, and
bushing, when the extrusion shaft presses down, the pressure plate and elastic element drive multiple first ball bearings at the bottom of the pressure cap to evenly abut against the ring plate, stably transmitting vertical pressure to the
bushing and main shaft. This effectively reduces the deflection vibration of the main shaft during spinning, significantly improves the spinning accuracy of the spinning disc, and solves the problem of poor cup rim forming quality caused by insufficient main shaft accuracy in traditional equipment.