Pre-treatment process is indispensable, the purchase of oil contains a certain amount of impurities (branches and leaves, soil, etc.), if not after screening, cleaning, reduce the oil yield is small, accelerate the wear and tear of the internal components of the oil press, resulting in failures and accidents, so that we can not regret. Pre-treatment equipment that can be selected include: cleaning sieve, de-stoning machine, magnetic separator and so on. Among them, there are still oil materials with shells in the pressing process, we also need related shelling equipment, shelling and then pressing, which can effectively improve the working efficiency and oil yield. Certain oilseeds can be pressed as a whole, but after crushing, rolling and then pressing, the oil yield can be significantly improved.
In the process of feeding should be kept uniform, not more or less, or will seriously affect the life of the oil press equipment and oil yield. In the oil press equipment in the process of pressing the oil content of high oil material is mostly concentrated in the strip row and the front group of round rows, strip rows at the oil accounted for about 60% of the total amount of oil, the front group of round rows accounted for about 30%; and the end of the discharge of oil is very little, into a drop not line, the oil color is very clear. In addition, the screw oil press can see whether the moisture is suitable when the moisture is too high or too low, the oil position will move back. If you want to improve the oil yield, you can evenly mix the oil dregs with more oil into the oil, and press it for two to three times to squeeze it.