Hello! Ruyang Machinery Factory welcomes to answer your questions. The so-called self-cooked machine means that the fans are cooked when they come out. There are roughly two kinds: one is friction ripening. Many advertisements on the internet say that you can say sweet potato powder, but you can't. One way is to heat with water temperature and then ripen, which can be made into sweet potato vermicelli. Non-self-ripening refers to mechanical molding and then heating to mature in other forms, such as colander, coating and so on.