The screw oil press can squeeze more than 20 kinds of oil on the market. Common types of oils are rapeseed, peanut, sesame, sunflower, flax, soybean and so on. Special oils include camellia seed, cotton seed, pepper seed, safflower seed, peony seed, coconut paste, etc. The squeezing process of different oils is not the same, so there must be a certain squeezing process for each oil.
The basic process of the oil pressing process of the screw oil press is as follows:
1. Common oil squeezing process: Raw material–steaming andfrying–pressing–crude oil filtration
2. The hot pressing process of special oil: Oilseeds–fried seeds–squeezed–filtered
3. Special oil cold pressing process: Oilseed–one whole seed,cold pressing (two times)–one filter
The process of oil being squeezed out of the oil: When the oil enters the press chamber of the screw press, as the press chamber rotates, the pressure increases. The seed material is continuously squeezed as the oil is squeezed out, and the pressure between the directly contacting squeezed material particles causes the plastic deformation of the seed material, especially where the oil film is broken and the adhesion is integrated. In this way, after being squeezed out of the frying chamber, the squeezed material is no longer a loose body, but forms a plastic body called oil cake. The dual effect of temperature and pressure during pressing. Let the oil reach a high oil yield.
Some special oils are used to squeeze oil, so the cold pressing process must be used. For example: pepper seeds, safflower seeds, peony seeds, coconut paste, etc. Cold pressing can well ensure the color and nutrition of the oil.
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