Fried or Baked Corn Collets potato/corn snacks chips Gelatinization of moisturized starchy ingredients takes place inside a concentric cavity between two brass plates, one rotary with 3 blades (fingers) plus grooves, and the other one with grooves only. The action of these blades on the rotating head creates the necessary condition of pressure and heat to achieve gelatinization of the raw materials at approximately 260°F (127°C). Expansion and forming of the product occurs in a narrow gap between the two plates (usually referred to as rotor and stator). Blades affixed to a circular knife support ring mounted on the outer edge of the rotor cuts to the desired size. Moisture, feed screw speed and type of brass used for the extruder heads control the expansion and texture of the product.