By changing the screw dimensions (diameter, winding pitch, etc.), the supply amount of raw materials can be adjusted.
In addition, by altering the shape of the screw, the characteristics of the raw materials (smooth and good flowability) can be combined with adhesiveness and cohesiveness (such as fluffiness and lightness) for handling.
It can be said that the screw feeder is the most stable and widely applicable conveying method for powdered and granular materials.