Screw Oil Press: One Machine for Multiple Oilseeds

A screw oil press is a piece of equipment that extracts vegetable oil through pure physical compression. It is widely used in small and medium-sized oil mills and oil processing plants. It does not use any chemical solvents; instead, it relies on mechanical force to “squeeze” the oil out of the oilseeds, resulting in pure, safe oil with a natural flavor.

Working Principle (Three-Step Oil Extraction)

1. Feed Advancement: The oilseeds enter the pressing chamber, where the rotating screw shaft pushes them forward.

2. Extraction by Compression: The space within the pressing chamber gradually narrows, increasing pressure continuously. The oil is released from the oilseed cells and flows out through the gaps between the pressing bars.

3. Cake Discharge: The remaining residue is pushed to the cake outlet, compressed into cake form, and discharged; it can be used as animal feed or fertilizer.

The entire process involves physical pressing with no chemical additives and no solvent residues.

Suitable Raw Materials (Multi-Purpose Machine)

The screw oil press has broad raw material adaptability. Common oilseeds that can be processed include:

Category and Varieties

Edible Oilseeds: Rapeseed, soybeans, peanuts, sesame, sunflower seeds

Specialty Oilseeds: Cottonseed (for edible use after refining), flaxseed, tea seed

Industrial Oilseeds: Tung seed (for industrial oils such as paints and coatings)

A single machine can process multiple types of oilseeds, offering high production flexibility.

Core Advantages (Four-Point Summary)

Physical pressing, safe and pure: No chemical solvents are used, eliminating the risk of oil residue and aligning with natural food standards.

High Oil Yield, Substantial Returns: The well-designed pressing chamber structure ensures high oil extraction efficiency, directly boosting production profits.

Simple Setup, Low Entry Barrier: Production can begin with just a roasting pan, oil press, and filtration equipment; space requirements are minimal.

Easy to Operate, Low-Maintenance: Modular design makes daily operation intuitive; stable operation is maintained through cleaning, lubrication, and part replacement.

Summary

The reason screw oil presses have become the mainstream choice for small and medium-sized oil mills is straightforward:

Thorough extraction—physical pressing ensures pure oil;

User-friendly operation—simple setup and convenient maintenance;

Clear profitability—high oil extraction rate, compatibility with all raw materials, and a clear return on investment.