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Oil is produced from various seeds like sunflower seeds, coconut, soybeans and so on. It is not easy to take out oil from these seeds as it needs to go through some kind of process. This process involves oil expeller machines. It consumes time and the two main ways that are included in extraction process are mechanical and chemical methods of extraction. Oil expeller is a machine that creates pressure by the rotation of screws present automatically.
How it works?
Method which is performed with screws is known as mechanical method. It aids in taking out oil from the oil seeds. The oil which is formed is a food product which includes raw material and later it is turned into main oil. But one thing is to be kept in mind sometimes untreated seeds come so there can be low recovery of oil at the time of processing.
The main advantage of it is this it does not need huge amount of money and can be used at low level of production. In the market the food oils that you get are fully refined just because of screws only. These contain hopper inside it which helps in taking out the oil with great force from the seeds present in it. The pressure is full that break the cells and allow the oil to come out from the seeds.
Along with the extraction process the material has to be compressed so that liquid will easily come out. Then the oil that will come out leaving the waste this will be known as a cake. Seeds can be continuously sent into the machine which crush the seeds and oil comes out very fast. A lot of heat is generated due to pressure when this process is performed. With this heat some problems can be noted such as overheating.
Criteria of designing
- It has high efficiency for oil extraction
- There is loss of low extraction
- Good oil quality
- Material required for construction is easily available
- Worm shaft must have enough pressing
Structure
Screws present in the oil expeller machines mainly have gears, press screws and machine frame in them. These things give the structure of screw and with this it can work well and give best results. Chambers are available for extraction and they are designed according to pressure vessel. Oil expeller include the photographic view of the hopper, side view of hopper shaft, screws in the crushing chamber.
With the good structure there will be fewer chances of things getting blocked inside it. If it happens then in this case chamber should be kept open for safety. The separation of oil from oilseeds has effect on both the quality as well as quantity of oil obtained from the seeds. Oil seeds have various capacities of machines according to their kind.
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