... mould, which makes the every piece of the upper bonds tightly. And with the help of mould, ... traditional sewing machine. To produce 100000 pieces of shoe’s uppers a day, if use sewing processing, ... machines, but for seamless welding, a pair of shoe’s upper only needs 30-60seconds, which means we only ... start button.At last, collect the finished upper. No need training the professional skills. Sport Shoes ...