... related food 2)mould changable 3)easy working paper box folding machineJBZ-S30 Paper Bowl Machine Description :Model JBZ-S30 ... procedure of automatic pre-printed-fan-shape-paper feeding, two-step pre-heating, bowl-side-body sealing(ultrasonic wave), silicone ... lubricating(for top curling), bottom punching, two-step bottom heating, bottom pre-folding, bottom knurling, top curling and bowl discharging. ...