Development of a Sunflower Oil Expeller

An expelling machine was developed for extracting oil from decorticated sunflower seeds. The expelling unit consists of an auger with decreasing pitches and the heating of seeds is achieved by generated steam, which heats the surrounding of seeds passage. The machine was tested at auger speeds of 30, 40, 50rpm respectively and three throughputs. Results showed that performance efficiencies increased with auger speed and throughput. Expelling efficiency of over 70 % was obtained. The machine has expelling capacity of 24.4 litres/hr. of oil and throughput capacity of 502.64 kg/day