Oilseeds pre-pressing is an important link in oil processing technology. Its main purpose is to preliminarily extract some oil from oilseeds by mechanical pressing, thus creating conditions for the subsequent leaching process. At the same time, the pre-pressing process can also effectively protect the nutritional components of oilseeds, reduce the loss during processing, and improve the yield and quality of oil extraction:

First of all, pre-pressing can reduce the oil content in oilseeds, making it more suitable for the next solvent leaching process. The raw oiseeds contain a high proportion of grease. If it is leached directly, it will not only increase the amount of solvent used, but also reduce the leaching efficiency. By pre-pressing, most of the oil in the oilseeds can be extracted, and only a certain proportion of residual oil is retained, thus optimizing the subsequent technological process.

Secondly, pre-pressing can effectively improve production efficiency. Through mechanical pressing, part of oil can be separated quickly, and the workload of leaching equipment can be reduced. At the same time, the structure of pre-pressed cake is loose, which is more conducive to the penetration of solvent and the further extraction of oil. This process combination not only saves time, but also reduces the production cost.

In addition, pre-pressing also plays an important role in protecting the quality of oil. In the process of mechanical pressing, because the temperature and pressure are relatively controllable, the natural components in oilseeds, such as vitamins and antioxidants, can be retained to the greatest extent. However, direct high temperature treatment or excessive processing may lead to the loss of these nutrients. Therefore, pre-pressing is an important process with both efficiency and quality.

To sum up, the main purpose of oilseeds pre-pressing is to preliminarily extract oil, optimize the subsequent technological process, improve production efficiency and protect oil quality. This process plays an irreplaceable role in modern oil processing industry and provides important support for efficient and high-quality oil production.