Operation of a dual purpose oil press

Nowadays, the oil press has improved its power, pressure, and temperature conditions, making it very easy and convenient to work. First, the raw materials are screened and impurities are removed, and then the raw materials are crushed and softened by adding about 7-8% water. They are then steamed in a steamer to around 115 degrees before being pressed. Oil pressing can be divided into cold pressing and hot pressing. In order to improve oil yield and oil quality, hot pressing is generally the main method. The Suihua brand cold press spiral oil press has the characteristics of high oil yield, strong adaptability, and continuous operation. Various plant oils, such as peanuts, soybeans, rapeseed, cottonseed, sesame, olives, sunflower seeds, tea seeds, tung seeds, etc., can be pressed to produce oil.

The two process flows are as follows:

Cold pressing: Rapeseed screening - embryo pressing - pressing: First, the rapeseed is screened to remove impurities, and then the moisture content of the rapeseed is checked. If there is no testing equipment, the soil method can be used for testing: use a nail to squeeze the rapeseed, if there is a sound, and divide it into two pieces, or if there is oil, extrusion is the most suitable. If it becomes powder, it is too dry, and if it becomes cake, it is too wet. If it is too dry, add 2.5-3% water, stop for a while, and directly enter the oil press for pressing. Press twice on one side.

Hot pressing: Raw materials - screening - pressing embryo - steaming and frying - pressing. The rapeseed is screened to remove impurities, and then enters a rolling embryo machine to roll the embryo. After rolling the embryo, it enters a steaming and frying pot for steaming and frying. During the steaming and frying process, 2-3% water is added to the pot. When the fried seeds reach a brown color and the temperature is 110-120 degrees Celsius, they can be pressed.

The pressing method of peanut kernels: Peanut kernels can be hot pressed or cold pressed, with hot pressing being the main method (cold pressing is not as effective as hot pressing). When hot pressing, the peanut kernels are first crushed or crushed, and then steamed in a steamer for 15 to 2 hours. The temperature reaches about 120 degrees Celsius, and the water content is about 3% before being pressed. When the temperature of the oil press reaches 85 degrees Celsius, normal pressing begins. If there is no steamer, peanut kernels can also be fried in a frying pan. First, crush the peanuts and gradually add about 7-8% water. Stir fry until dark yellow, then remove from the pot and press.

1、 Cleaning and drying of raw materials:

2、 The raw materials entering the oil factory inevitably carry some impurities. Before entering a small oil press, if the soil, stems, leaves, and other debris carried in the sesame fruit are not removed, they will not only affect the quality of the oil and cake, but also adsorb a portion of the oil, reducing the oil yield. If there are impurities such as sand, metal, hemp rope, etc. in the sesame fruit, it can even cause wear and tear on the machine parts, trigger production accidents, and affect the process effectiveness. Therefore, in order to ensure the smooth production, impurities must be removed as much as possible. For some rapeseed fruits with high water content, it is also necessary to dry them for easy shelling.

3、 There are many methods for cleaning, and different methods can be used according to the situation of impurities. If the impurities contained are light, such as grass, stems, and leaves, they can be removed by air selection using airflow. If the impurity particles are small, they can be removed by selecting. For impurities of similar size and relative density to rapeseed, if they belong to soil blocks, they can be rubbed and crushed in a mud mill before being removed by screening method. If it is an iron impurity. Electromagnets or permanent magnets can be used for separation. After cleaning, the impurity content should be below.

4、 Heat treatment (steam frying):

5、 Heat treatment is one of the most important processes in the process of extracting oil. Heat treatment includes wetting and heating of the raw material, which is called steaming or frying failure in production, and the failure after steaming and frying is called ripening failure. Those that have undergone heat treatment and are pressed are called hot pressing, while those that have not undergone heat treatment are called cold pressing. Rapeseed is mainly hot pressed. The effectiveness of heat treatment has a direct impact on the smooth progress of the entire oil production process, the level of oil yield, and the quality of oil and cake.

6、 Pressing:

7、 Small oil press is a widely used small oil press in rural small oil factories. It has a simple structure, high pressure, can continuously process materials, low labor intensity, and can press various types of oil. Due to its serrated curve and conical surface, the material is pushed and squeezed by the screw during pressing, causing the volume of the space between the screw and the inner wall of the cage to constantly change. At the rear of the cage, due to the arrangement of circular bars, the inner wall of the cage is serrated, and the billet is alternately pressed and relaxed. The structure of the billet is constantly adjusted to achieve uniform flipping, Provide more opportunities for unexpressed oil or blanks with less oil to be fully pressed. Therefore, its squeezing effect is relatively good.

In fact, if you want high quality oil, you must make refined oil. The purpose of refining oil is to remove impurities and treat the extracted oil. This includes four processes: hydration degumming, neutralization of acidity, deodorization, and color removal. But as a small processing oil press user, there is no need for such complexity. What is the effect of removing glia? Gelatin is something that increases the color of oil and makes it prone to foaming when used. So this process can solve this problem. To improve the quality and appearance of the processed oil, and to remove harmful substances from the human body. So refining can improve the quality of oil products. So the oil extraction production line is: peeling and screening dual-purpose machine → frying machine → oil extraction machine → refining.