Soybean oil Extraction with Oil Pressing Machine

Soybean oil is one of the major vegetable oils in the world, occupying a significant share in the global edible oil market, and the global production of soybean oil is usually more than tens of millions of tons. China, the United States, Brazil and other major producers of soybean oil.

Since the oil content of soybean is in the range of 15%-26% and the oil yield is in the range of 12%-18%, the oil pressing method has been an important and effective method in the production of soybean oil.

Generally, the gross oil with more impurities is obtained after treatment with various methods such as pressing method and leaching method, and then the edible refined oil is obtained after refining.

To ensure your soybean oil production is at its optimal level, Zhengzhou Fude Machinery’s oil extraction solution covers every key step from pretreatment and pressing to screw pressing operations.

Soybean oil pressing process

Hot Pressing Process: soybeans→cleaning →crushing→softening→steaming→oil pressing

Soybean Steaming & Frying in Oil Extrac​ting Method

In addition to the soybean pretreatment stage of soybean cleaning, crushing and softening, embryo making, before the extraction of soybean oil, the soybean embryo steaming directly affects the subsequent process and the quality of the oil, and aimed at destroying the cell structure of soybeans, help to improve the extracting rate of oil.

In the process of steaming & frying into the steaming pot, the reasonable control of the steaming and frying parameters is the key to ensure the maximization of the effect of the oil extraction process. The following is the key parameters of the optimization proposals:

Rational Control of Soybean Streaming Parameters

Note on cold pressing of soybeans：

Can be whole seed pressing, so that the whole seed pressing to strictly control the moisture, generally control 8-10% , and pay attention to the heating of the press to be the body temperature rose to about 80 ℃ before pressing.

How to Select Su​itable Soybean Oil Pressing Mill for Business?

• Matching equipment selection: the basis for quality pressed soybean oil production

Different production and processes have different requirements for soybean extraction equipment. For example, some equipment may be better suited to specific pressing temperatures and pressures. Ensure that the equipment you select meets the requirements of your production process in order to obtain high quality soybean oil.

• Matching production size: increasing productivity

Different sizes of soybean oil pressing equipment are suitable for different production needs. Fully understand the scale of production and market demand to determine the capacity of the required equipment. Selecting equipment that matches the production scale helps to improve efficiency.

Oil Press: Screw vs. Hydraulic

• The screw oil press is a fully hydraulic, automated edible oil processing machine that uses a rotating screw shaft to continuously and efficiently extract oil from raw materials. Its core advantages lie in its compact structure, user-friendly operation, and high oil yield. Widely adopted by individual entrepreneurs, small oil mills, and agricultural cooperatives, it supports pressing over 30 types of oilseeds including peanuts, soybeans, rapeseed, and sunflower seeds.
• The screw auger is constructed from high-carbon steel or Chromium 40 material, undergoing high-frequency quenching and heat treatment to achieve high hardness and exceptional wear resistance. It is designed for continuous operation under high-temperature and high-pressure conditions, with a service life 8-10 times longer than traditional materials.
• The pressing chamber features a progressive pressure-building structure. The root diameter of the screw gradually increases while the pitch decreases, propelling the material forward while inducing tumbling and relative motion. Friction-generated heat disrupts the colloidal structure of the oilseeds, promoting oil separation.
• Employing a multi-stage progressive pressure-building principle, chamber pressure rapidly escalates to achieve complete oil-seed fission and separation in a single pass.
• Equipped with an infrared temperature control system, it automatically regulates pressing temperature (120-160°C) and moisture content. This softens and activates oil molecules, enhancing oil yield while ensuring oil quality.
• Hydraulic oil presses are designed based on Pascal’s principle (a principle of hydraulics). Within a sealed container, any change in pressure at a single point in a balanced fluid transmits to all directions with equal magnitude. By generating substantial pressure through the hydraulic system and applying it to the oilseeds, the oil within the seeds is squeezed out.
• High Oil Yield: Employing a multi-stage progressive pressure increase mechanism, the pressing chamber rapidly builds pressure to achieve complete oil separation in a single pass. Simultaneously, an infrared temperature control system automatically regulates pressing temperature and moisture content. This directly softens the oilseeds, activating oil molecules for stable pressing and complete extraction in a single pass, significantly boosting oil yield. Compared to older equipment, normal oil extraction rates can be 2 to 3 percentage points higher.
• Multi-purpose design: Capable of efficiently processing a wide range of oilseeds, including peanuts, soybeans, sesame seeds, sunflower seeds, flaxseeds, walnut kernels, tung seeds, castor beans, almonds, and other oil-bearing crops.
  

Cleaning and Maintenance of Screw Oil Press

• In order to ensure the efficient operation and prolong the service life of the screw oil press, regular maintenance is required. 

Regular cleaning: Clean all parts of the screw press, especially the oil residue opening and the feed box, to prevent the soybean residue from accumulating and affecting the production efficiency.

Check the lubrication system: Ensure that the lubrication system of the screw oil press machine operates normally, add lubricant in time to ensure the smoothness of the screw operation.

Check the screw wear: Check the screw wear regularly, and if necessary, replace the screws with serious wear in time to maintain the pressing effect.

Clean the filter screen: Clean the filter screen regularly to prevent clogging and ensure the quality of oil and grease extracted.

Join the oil press business

Building a successful soybean oil production line requires a clear plan. The process starts with a complete pre-treatment line to prepare the beans. Then, you must choose the right extraction method based on your capacity: mechanical pressing for smaller scale or solvent extraction for large, industrial scale. Finally, the crude oil must be refined to create a valuable, edible product. The soybean meal produced is also a major source of revenue.

Your first step should be to analyze your intended production volume and your target markets for both the oil and the meal. Then, you can decide which type of soybean oil extraction machine line is the right investment for you.

Contact our expert team at Fude Machinery today. We are here to provide a professional consultation and a detailed quotation for your project.