All you need to know about Oil Press Machines

This article is about an oil press appliance, a ram press appliance that is manually powered and applied in the pressing of a variety of seeds to get oil as the end product, and its different models, advantages, and disadvantages.

An oil press, also known as an oil extractor machine, is a device that uses high levels of heat and pressure to expel oils from plant products such as vegetables, fruits, nuts, seeds, and other green plants. This process is chemical-free and purely mechanical.

Types of Oil Press Machines

Oil extractor machines are mainly categorized into the screw and the hydraulic oil extractor. The hydraulic oil extractor is suitable for nutrient-flavored oil like cocoa beans, while the former is best for oil products with massive amounts, like peanuts, soybeans, and rapeseed. The screw oil extractor, therefore, has a higher output rate than the latter.

Components of an Oil Extractor

Although an oil press machine may come in various configurations, the major components are:

Slots: This screening platform enables oil to be extracted while retaining the other materials removed in a cake form as they navigate the screw.

Hopper: This metallic structure funnels the natural products down the pressing screw.

Screw press: It acts as the oil expeller’s powerhouse. It has a screw shaft that rotates cylindrically in a cage forcing the raw material into a chamber with high pressure, generating friction between the contents, the post, and the section itself.

Frame: It is a metallic structure that supports and connects all the components.

Gearbox: It is also known as the GRU (Gear Reduction Unit). It converts the motor’s torque and speed to match the machine’s settings correctly.

Other parts of an oil extractor machine include the rings, lock nuts, gaskets, and seals, which join to make more significant components. These parts are either made of elastomeric material or metal to ensure the durability of the oil extractor.

How an Oil Extractor Works

Raw materials such as groundnuts are first peeled before being introduced into the screw press (a screw inside a highly pressurized cylindrical chamber).

The products navigate along the screw while generating both heat and friction. It is important to note that the high pressure and heat force out some oil. Some proteins may be denatured for the oil to be viscous to ease its movement. As it squeezes out, it is passed through a filter to ascertain that no fibers or solids pass through, thus extracting a smooth and clean product—the residue from a cake-like structure that is gotten rid of. 

Advantages of an Oil Extractor

  • An oil extractor is easy to operate
  • It is economical
  • No chemical additives in your extracted oil, for you control whatever goes in your oil.
  • You have the freedom to remove any oil type
  • It is pollution free

Disadvantages of an Oil Extractor

  • The yielded oil is not as high
  • Yielded oil can only be stored for short periods since the content of water is not stable.

All said and done, the advantages of having an oil extractor machine outweigh its limitations. Oil extractor machines are widely used in the agricultural sector as they are reliable, healthy, and produce high-quality products.


I am Selim Khan Dipu (Professional Blogger)