Sport shoes upper made by high frequency welding machine JY15000HR-PLC. with ... on the mould, which makes the every piece of the upper bonds tightly. And with the help of mould, the ... , but for seamless welding, a pair of shoe’s upper only needs 30-60seconds, which means we only need 14 ... , press the start button.At last, collect the finished upper. No need training the professional skills. Sport Shoes ...