This machine is designed in such a way that all the three processes:
Roasting of groundnut, Separation of groundnut shells from the groundnut seed, and the oil extraction is done in a single unit without any human interference.
The machine components are:
bowl feeder, crushing rollers, conveyor tray, vibrating tray, hopper and extracting chamber.
The fabricated machine is then tested to establish the influence of moisture content, heating time and temperature on percentage oil yield. The machine has an extraction capacity of 85 kg/hr with the screw shaft rotating at 53 revolutions per minute and a reduction gear to step down the speed of rotation to ratio of 27:1. The roaster was equipped with; a barrel heater. The machine gave the highest oil yield of 28 %, an equivalent of 64% when compared to 45% oil content of groundnut, at 100oC, heating time of 15minutes. The overall cost of the machine was Rs. 45,000.