Process flow of Wangquan screw oil press

Now that the oil press has improved the power, pressure and temperature conditions, it is very easy and convenient to work. First, the raw materials are screened and removed, and then the raw materials are crushed and softened by adding about 7-8% of water, and then steamed to 115 degrees in the steamer Left and right can be squeezed. Oil pressing is divided into cold pressing and hot pressing. In order to improve the oil yield and the quality of oil products, hot pressing is generally the main method. Wangquan brand cold-pressed screw oil press has the characteristics of high oil output, strong adaptability and continuous operation. For various vegetable oils, such as: peanut, soybean, rapeseed, cottonseed, sesame, olive, sunflower seed, tea seed, tung seed, etc. can be pressed to make oil.

The two processes are as follows:

Cold pressing: Rapeseed-Screening-Embryo pressing-Pressing Firstly, 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 to detect: Squeeze the rapeseed with a nail, if there is a noise , And divide into two pieces, or squeeze out with oil is the most suitable, if it is powder, it will be too dry, if it is cake, it will be too wet. If it is too dry, add 2.5-3% water, stop for a while, and directly enter the oil press for pressing. Squeeze it twice on one side.

Hot pressing: raw materials-screening-embryo pressing-steaming and frying-pressing to screen the rapeseed to remove impurities, and then enter the embryo rolling machine to roll the embryo, after rolling the embryo into the steaming pan for steaming, in the process of steaming and frying Add 2-3% water in the pot, wait until the fried seeds reach brownish yellow, and the temperature is 110 degrees -120 degrees is the most suitable, before squeezing.

The pressing method of peanut kernels: hot pressing and cold pressing of peanut kernels can be done, mainly hot pressing (cold pressing is not as effective as hot pressing). When hot pressing, the peanut kernels are crushed or rolled, and then steamed in a steamer for 1.5-2 hours, the temperature reaches about 120 degrees, and the water content is about 3% before being pressed. When the temperature of the oil press reaches 85 degrees, it starts to be normal press. If you don't have a steamer, you can also put the peanut kernels in the wok for frying. First crush the peanut kernels, gradually add about 7-8% water, and fry them until they are dark yellow.

1. Cleaning and drying of raw materials:

　　 The raw materials entering the oil plant will inevitably carry some impurities. Before entering the small oil press, if you do not remove the dirt, stems and leaves entrained in the sesame fruit, they will not only affect the quality of the fat and cake, but also absorb part of the fat and reduce the oil yield. If the sesame fruit contains sand, stone, metal, hemp rope and other debris, it will cause wear and tear of the machine parts, induce production accidents, and affect the process effect. Therefore, in order to ensure the smooth progress of production, impurities must be removed as much as possible. For some rapeseed fruits with high water content, it is necessary to carry out drying treatment for the convenience of peeling.

　　 There are many cleaning methods, and different methods can be used according to the impurities. If the impurities are light, such as grass, stems and leaves, you can use the method of winnowing to blow off the impurities with airflow. If the impurity particles are small, the impurity can be removed by selection. For some impurities that are similar in size and relative density to rapeseed, if they belong to mud blocks, they can be rubbed and crushed in a mud machine and then removed by screening. If it is iron impurity, it can be separated by electromagnet or permanent magnet. The impurity content after cleaning should be below.

2. Heat treatment (steaming and frying):

　　 Heat treatment is one of the most important steps in the process of oil extraction. Heat treatment includes the wetting and heating of the green billet, which is called steamed billet or fried billet in production, and the steamed billet is called cooked billet. The green pressed after heat treatment is called hot pressing, and the one without heat treatment is called cold pressing. Rapeseed is mainly hot pressed. The effect of heat treatment has a direct impact on the smooth progress of the entire oil making process, the level of oil yield, and the quality of oil and cake.

3. Squeeze:

　　 Small oil press is a kind of small oil press widely used in small rural oil factories. It has a simple structure, high pressure, continuous processing of materials, low labor intensity, and can squeeze a variety of oils. Because its circular press bar has a zigzag curve and conical surface, when the material is pressed, the volume of the press screw and the inner wall space of the press cage is constantly changing when the material is pressed. Arranged with round squeezers, the inner wall of the squeezing cage is zigzag, where the blanks are alternately squeezed and relaxed, the structure of the blanks is constantly adjusted, and evenly turned, so that the unsqueezed oil or the squeezed oil is less The preforms have more chances to be fully squeezed. Therefore, its pressing effect is better.

        In fact, if the oil is to be of high quality, it must be refined oil. The purpose of oil refining is to remove impurities and process the extracted oil. This includes four processes: hydration and degumming, neutralization of acidity, deodorization, and decolorization. But as a user of a small processing oil press, there is no need to be so complicated. What is the effect of removing gum? Gum is something that increases the color of the oil and makes it easy to foam. So this problem can be solved through this process. Make the processed oil better and better looking, and it can also remove harmful substances to the human body. Therefore, refining can improve the quality of oil products. So the oil pressing production line is: peeling and screening dual purpose machine → stir-frying machine → oil press → refining.