CAMARTEC oil press machine
CAMARTEC is a manually operated oil expeller machine used to produce oil from different kinds of seeds.
Oil press machine is a manually powered machine which was innovated and designed by CAMARTEC in the year 1990. It is used to press different types of seeds in order to produce oil out of them.
There are two models of different sizes: the BP30 (has small capacity) and the BP50 (has bigger capacity).
The product’s most recent testing and evaluation was in 2007, it has also been mentioned in a paper on cosmetic uses of sesame oil in 2011. It is uncertain if this product is still in the market or in use.
Ranging from $90 to $106 USD (price as of 1993)
Goal 8: improve livelyhoods and economic growth.
Trained individuals; it takes one day to be fully trained on how to operate the machine.
Mass produced through 9 manufacturers.
Direct from manufacturer, distributed once through Village Oil Press Project (VOPP).
Over 100 of these presses were sold in Tanzania until 1992.
A ram press operates by applying pressure to seeds inside a cylinder and cage by means of a piston and a system of levers. Under the pressure built in the cage the seeds release oil. To operate the machine a handle is used to press the seeds. The oil pressing process should be continuous from the beginning to end.
The machine is designed to be portable and to be repaired locally.
Specifications: -Mass: ~40 kg -Piston diameter: 30 mm -Handle length: 1 m -Bushing: none -Cage shape: straight
Image of a typical ram press. The piston of the press is operated by moving a long handle back and forth. The press may be mounted on either a steel or hardwood base for portability or, for greater stability, fixed in place on a cement platform with bolts.
By user. Parts need to be lubricated, bolts and nuts need weekly retightening and cleaning should be done twice a week.
The press can be repaired locally
According to a visit report in Tanzania, a common complaint among CAMARTEC press owners was that the piston tended to jam and that parts were wearing quickly. None of the presses visited had processed more than 60 bags (3 tons). This suggests a short lifetime, close to one year. The metal parts could be repaired or recycled after intensive wear.
On average it takes 4 to 5 hours to extract the oil, one man can operate the machine. The operation should be continuous. A stroke rate of 12 and 20 (strokes per minute) is recommended.
The BP-30 model was tested and compared to two other similar presses, to extract sunflower oil. CAMARTEC BP-30 was found to have the best performance; see comparison table.
The press has been tested to produce sesame oil, producing 1.5 l/in with a 62% extraction efficiency.
According to a visit report in Tanzania, a common complaint among CAMARTEC press owners was that the piston tended to jam and that parts were wearing quickly.
Uziak, J and Loukanov, I. A. 2007. Performance Evaluation of Commonly Used Oil Ram Press Machines. Agricultural Engineering International: the CIGR Ejournal. Vol 9
Warra, A. A. 2011 Sesame (sesamum indicum L.) seed oil methods of extraction and its prospects in cosmetic industry: a review.. Bayero Journal of Pure and Applied Sciences. 4(2): 164-168
Hyman, E. L. 1993. Production of Edible Oils For the Masses and By the Masses: The Impact of the Ram Press in Tanzania. World development. 21(3): 429-443.
Swetman, T. 1993. Report on a visit to Tanzania to review ram presses for Appropriate Technology International.. Chatham, England: Natural Resources Institute.
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