Development of u-channel screw jack for vegetable oil extraction.

No Thumbnail Available



Journal Title

Journal ISSN

Volume Title


Faculty of Engineering, University of Nigeria, Nsukka.


A U - channel screw jack for extracting vegetable oil was developed through design (with Solid works – Computer Aided D e s i g n ( C A D ) ) a n d f a b r i c a t i o n p r o c e s s e s. A f a c t o r i a l e x p e r i m e n t i n a R a n d o m i z e d C o m p l e t e B l o c k D e s i g n (RCBD) was used to investigate the effect of heating temperature (50, 60 and 70 ° C) and heating time (5 and 10 min) on the performance of the machine in terms of oil yield, extraction efficiency and extraction loss with groundnut as the feedstock. Results of the machine design for some of the machine components gave the following values: U - channel structural frame made of mild steel (80 x 160 x 650 mm), compression cap ( 70 mm) and heater band(3.5kW). Also, the performance evaluation of the machine showed that increase in heating temperature (50 to 70 ° C) and heating time (5 to 10 min) did not cause the oil yield, extrac tion efficiency and extraction loss to increase beyond 30%, 48% and 15% r e s p e c t i v e l y. G e n e r a l l y, d e c r e a s e i n o i l y i e l d, e x t r a c t i o n e f f i c i e n c y a n d e x t r a c t i o n l o s s o c c u r r e d a t t h e h e a t i n g temperature of 70 o C irrespective of the heating time. For future work s, other machine and feedstock factors should be incorporated into the performance evaluation process. Also, automation of the machine is recommended.


main article


Design, U - channel screw jack, vegetable oil extraction, test analysis