الفهرس 
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Abstract
An expelling machine for extracting oil -#102;-#114;-#111;-#109; wheat germ was designed and fabricated to be suitable for young investors. The procedures include the design stages, construction and testing. The main machine components are: Hopper (feeding inlet); expellant unit and an electric motor. The power is transmitted by means of a set of pulleys; sprockets; V-belt; chain and speed reducer (gear box). The expelling unit consists of two screw expellant shafts with two expellant barrels. br The expelling machine evaluated at five screw speeds (25, 35, 45, 55, and 65 rpm); four levels of press head clearance (0.5, 1, 1.5, and 2 mm); studying influence of the preheating process (in the range of 60-70°C) by the water at different atmospheric steaming periods (0, 10, 20, and 30 min) to change the initial moisture content of raw material (13.2%) to different levels (15.4, 16.2, and 16.8%). and influence of heating stabilization process (9.5% of moisture content) on expelling machine performance to determine the best Machine capacity (kg/h); Oil recovery (%); Residual oil (%); Oil productivity(L/h); Specific energy consumption (kWh/kgfeed); and Barrel temperature(°C). also, determine the economic feasibility for developed expelling machine. br Results showed that the expeller could be pressed wheat germ on two stages to give a better performance at as following. br 1-The maximum machine capacity (42.6 kg/h) was obtained -#102;-#114;-#111;-#109; stabilized wheat germ (9.5% moisture content) at 2mm outlet clearance and 65 rpm of screw speed. br 2-The maximum oil recovery (63%) was obtained -#102;-#114;-#111;-#109; stabilized wheat germ (9.5% moisture content) at 0.5mm outlet clearance and 25 rpm of screw speed. br 3-The maximum oil productivity (2.36 L/h) was obtained -#102;-#114;-#111;-#109; stabilized wheat germ (9.5% moisture content) at 2mm outlet clearance and 65 rpm of screw speed. br 4-The minimum SEC (0.0304 kWh/kgfeed) was found -#102;-#114;-#111;-#109; wheat germ (13.2% moisture content) at 2mm outlet clearance and 65 rpm of screw speed. br 5-The minimum barrel temperature (51.1°C) was found -#102;-#114;-#111;-#109; raw wheat germ (13.2% moisture content) at 2mm outlet clearance and 25 rpm of screw speed.