Expeller Machines to Extract Oil From the Oilseeds

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Last month I was on a business tour when I come to know about different types of machines. I am a science graduate and now working as a marketing associate in a research firm. My primary task involves doing research on various factories and collecting valuable information about different types of machines. One machine to which I was very much interested was an oil expeller machine. In this article, I will share my knowledge about oil expeller machines which I gained during my visit.

Although there are several types of expeller machines, oil expeller machines are generally used to extract the oil from the oilseeds such as rapeseed, palm kernel, sunflower seeds, castor seeds, linseed, jatropha, cottonseed, groundnut, copra (coconut), mustard, seasame seed, soya bean, cocoa bean, cashew nut shell, sheanut, macadamia nuts, corn germ and other oil bearing seeds/nuts.

This expeller and screw press machine contains a pressing chamber to which seeds are fed from one side of the press. The expeller machines use pressure and friction from the screw drives to move as well as to compress the oil seeds. The oil comes out of seeds through the small openings. I asked the operator why these opening are so small. He explained that these openings prevent any kind of solid material or residue from the seeds to mix with the extracted oil. This waste or solid residue of the seeds exists from the other end of the machine. This leftover residue is known as oil cakes.

As I was very much keen to know more and more about this machine, the operator answered all my questions with ease. Since ancient times, people are used to extract oil from the oil seeds. So, what’s the difference? In earlier days, the seeds were only cleaned and grinded by using grinders or stone mills. With the enhancements in science and technology, the use of automated oil expeller machines has started to extract oil from the oil seeds or nuts. These machines have made the extraction process very easy by making it fast.

There are mainly two types of oil expellers – full press expellers and pre press expellers. While the full press expellers are used by small and medium oil mills, the pre press expellers are used by large oil extraction companies. There are many advantages of employing these advanced expeller machines such as optimum oil yield at low operating cost, low power consumption, and ability to crush all types of edible and non edible oil seeds.

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