All the key points for selecting, using and maintaining a screw oil press are here, making oil pressing easier

The screw oil press is one of the most common oil pressing devices in the primary processing of agricultural products. From homegrown peanuts, rapeseed, soybeans and sesame to sunflower seeds, it can press fresh edible oil from them all. Compared with traditional manual oil pressing, the screw oil press completes feeding, pressing, oil output and cake discharge in one go, with simple operation and high efficiency. Many farmers and small oil mills use it to process their own oilseeds.

Working principle of the screw oil press

The screw oil press mainly relies on a rotating pressing screw to continuously push the oilseed forward. The volume of the pressing chamber gradually becomes smaller, and the oilseed is subjected to increasing pressure. Together with the heat generated by friction, the oil cells are destroyed, the oil flows out through the gaps in the pressing bars, and the residue is pressed into cake and discharged from the cake outlet. Because oil is extracted by pressure and friction-generated heat, the oilseed generally needs to be roasted to the proper temperature and moisture before pressing, so that the oil yield is higher and the oil aroma is stronger.

Focus on these points when selecting

First, look at the use and processing volume. The machine model needed for home oil consumption and for custom processing for others is different. Choosing one that is too large wastes money, while choosing one that is too small is not enough. Second, look at the material and workmanship. The parts in contact with the oilseed must be wear-resistant and high-temperature resistant. The pressing screw and pressing bars are wearing parts, so ask clearly whether replacement is convenient and whether accessories are easy to buy. Third, look at after-sales service. Whether someone can be found in time to repair the machine if it breaks down during the oil pressing season directly affects income. Fourth, pay attention to subsidy policies. Some regions have included oil presses in the scope of agricultural machinery purchase subsidies. Subsidy catalogs and standards vary from place to place. Before purchasing, you can consult the local agricultural machinery authority, and the information published locally shall prevail.

Practical suggestions for use and maintenance

Before pressing oil, pretreat the oilseed properly: first sieve out impurities such as stones and iron filings to prevent damage to the pressing chamber; peanuts, rapeseed and others should have their roasting temperature and moisture controlled according to variety. If too dry, the oil yield is low; if too wet, the pressing chamber is easily clogged. After starting the machine, let it run idle for a few minutes, confirm there is no abnormal noise, and then feed evenly. Never stuff in too much at one time. The crude oil just pressed out has a high temperature and many impurities. After standing to settle or simple filtration, it tastes better and keeps longer.

After pressing oil each season, clean it promptly: remove the pressing screw and pressing bars, and clear away residual oil residue to prevent hardening and mold; check the wear of wearing parts, and replace them if the wear is serious; when the machine is not used for a long time, wipe it clean and apply oil, and place it in a dry, ventilated place to prevent moisture and rust. During use, also pay attention to safety. Do not push the oilseed directly with your hands during feeding, to prevent burns or being caught. Electrical wiring must be properly grounded.

In short, compare more when purchasing, operate according to procedures when using, and maintain frequently in normal times, and the screw oil press will last long and produce oil steadily. For specific model parameters and subsidy standards, it is recommended to consult the local dealer and agricultural machinery department before making a decision.