The invention discloses a
cup feeding mechanism of a cup printing
machine. The
cup feeding mechanism of the cup printing
machine comprises a
machine frame, a supporting plate, a
turbine, a worm, fourfixed shafts, four swing arms, four screws and a driving mechanism capable of driving every two adjacent screws to rotate in the opposite direction. The four points on the edge of an opening of a cupare subjected to synchronous transmission though screw grooves of the four screws, and the cup can be more stably and accurately connected on a cup mold in a sleeving mode, so that the alignment of the cup with a printing device is more accurate; linear wire guiding grooves and curved guiding grooves which cross each other are arranged on the
turbine and supporting plate to locate the movement track of a roller shaft, the
turbine pushes the swing arms to swing inside and outside through the roller shaft through the adjustment of the worm, and the
diameter of a circle enclosed by the four screws is adjusted and the circle is applicable to cups of different specifications; since the screws are installed at the
tail ends of long arms of the swing arms, the distance between the screws and a fixed shaft is fixed and unchanged, part of the transmission connection on the long arms follows the movement of the long arms, and when the
diameter of the circle enclosed by the four screws is adjusted, any structure of the driving mechanism does not need to be changed.