Screw oil press is a special machine for squeezing oil. The machine can process sesame, peanut, rapeseed, sunflower, soybean oil, but the characteristics of each oil are different, and the oil yield and the temperature of the heating machine are also different. but the screw oil press can process a variety of materials, achieving a multi-purpose machine, and the machine has a high oil output rate, which is suitable for oil press workshops, agricultural planting farms, oil press factories, etc.
Two ways to squeeze oil
There are two types of oil pressing methods: hot pressing and cold pressing. Hot pressing requires frying the raw materials to a certain temperature and then pressing them in the oil press. Cold pressing is relatively simple, and the materials can be put directly into the press. Into the oil press for squeezing, but the same raw material has a higher output rate of hot pressing than that of cold pressing.
Can the squeezed oil be eaten?
The oil squeezed by the screw press will be filtered. This oil can be eaten directly, but the oil quality after treatment is better and requires further refined oil processing. In addition, the shelf life of directly squeezed oil is generally 12 months.
Common oil squeezing methods
How to squeeze rapeseed?
First heat up the machine to 110-140℃, put the rapeseed in the pot for baking when the rapeseed in the pot is green, stir-fry the rapeseed on low heat until the rapeseed is dark yellow out of the pot, then cool to 60℃ and enter the oil pressing machine.
The machine is heated to 180°C, and the peanuts are fried in the pot until they turn yellow, and directly enter the oil press for squeezing. The oil is yellowish-white
Heat up the machine to 140°C, fry the soybeans until they make a cracking sound, and then put them at about 60°C for pressing, the soybean oil cakes appear large, if the slag appears in this case, it is because the soybeans have cooled down after the stir-frying. Not enough or too lightly fried seeds
Sesame oil pressing
The machine is heated to 130-170℃, the sesame seeds are poured into the pot to show an explosive yellow and then put into the machine to be pressed. The pressed oil is reddish-yellow, and the oil cake is large or long.
Screw oil press working principle
The principle of oil squeezing is mainly to push the oil in a spiral way. As the gap between the squeezing chambers is gradually reduced and the density of the oil gradually increases, the pressure gradually increases. The friction between the oil and the parts generates heat, which constitutes the oil squeezing. The element of the process destroys the cell tissue of the oil, the oil overflows from the oil line, and the oil cake is pushed out between the cake outlets. When the spilled oil flows into the oil filter barrel through the oil pan, the vacuum pump draws out the air in the barrel, and negative pressure is formed in the barrel. The oil passes through the filter cloth and is pushed into the oil filter barrel, while the oil residue is left on the filter cloth. Then you can get pure oil
Maintenance of screw press
- The lubrication should be checked after every 50 hours of work. The oil cap on the reduction box must not be short of oil, and butter should be added to the screw hole. Dry grinding is strictly prohibited
- When the squeezing volume is reduced, the cake or the oil is not normal, the screw shaft should be pulled out, and the wear of the screw, the squeeze, and the cake ring should be checked, and the worn parts should be replaced in time
- After each oil extraction, the remaining cakes in the machine should be removed, and the dust and grease on the surface of the machine should be wiped clean.
If the oil pressing season is over, long-term storage is required. Deep maintenance should be carried out, and the snails, strips, and cake rings should be disassembled, washed and re-oiled, and placed in a dry place.
Screw press oil extraction parameters
|main engine equipped with power（kW)||2.2||5.5||7.5||15||18.5|
|Vacuum pump with power （kW)||0.75||0.55||0.75||1.1||1.5|
|Heater with power （kW)||0.9||2||2.2||2.8||3|
Factory test of screw oil press machine
Attached table of oil press performance
|Oil yield（%）||Dry cake residual oil rate（%)|
Coconut flour, peanuts, rapeseed, soybeans, hemp, sesame, flax, corn germ, melon seeds.
Yes, there is a control panel to adjust it
60, 70, 80, 100, 125, 150mm
It can be used, but a hydraulic oil press is more recommended