Working Principle: Heat is produced with the functions of kneading, friction between the spiral shaft and inner wall of the expander, meanwhile eject in steam to increase flake temperature. Cell tissue of oilseed is destroyed completely inside the Expander. When the oilseed is extruded out of the expander, high pressure and high temperature oilseed is expanded because of sudden pressure-relief. Meanwhile moisture in it is evaporated all of a sudden. Therefore the material becomes microporous structure and the soybean is expanded to irregular, loose and high intensity particles. Features: 1 Improve the working capacity of subsequent Extractor 2 Improve the extraction speed and shorten the extraction time; 3. Reduce solvent content in wet meal and reduce load of desolventizing system 4. Increase miscella concentration and reduce load of miscella evaporation system 5 De-activate enzymes in oilseed and improve oil quality 6 Improve working capacity of Flaking Mill 7. Reduce Energy Consumption in the process of Oil Extraction