3 Types of Oil Press for Your Choice
Oilseeds and nuts should be properly dried before storage, and cleaned to remove sand, dust, leaves and other contaminants. Fruits should be harvested when fully ripe, cleaned and handled carefully to reduce bruising and splitting. All raw materials should be sorted to remove stones etc. and especially moldy nuts, which can cause aflatoxin poisoning. When storage is necessary, this should be in weatherproof, ventilated rooms which are protected against birds, insects and rodents. Some raw materials (for example groundnuts, sunflower seeds) need dehusking (or decorticating). Small manual machines are available to give higher production rates than manual dehusking
Methods of extraction
There are basically three methods of removing oil from the raw materials: solvent extraction, hot processing or cold processing. Solvent extraction is not suitable for small-scale processing because of high capital and operating costs, the risk of fire and explosions from solvents and the complexity of the process. Equipment for hot or cold processing is available at different scales of operation from household to industrial scale. Traditional methods of extraction are described below, followed by higher output manual machines and mechanized extraction.
Principle of oil extraction
Expellers are continuous in operation and work by grinding and pressing the raw material as it is carried through a barrel by a helical screw. The pressure inside the barrel, and hence the yield of oil, are adjusted using a ‘choke’ ring at the outlet
THE OIL PRESS WITH ELECTRICAL HEATER
It includes electrical heating pipe and control cabinet. The power of heating pipe is 1.5kw
Usually, when press the oilseeds, the oil press need be grinded first using raw material, in order to make the pressing temperature of chamber reach 80-120 degree. Then there is oil come out. If there is no heater, it takes about 30 minutes to make the temperature reach the appointed temperature. But this kind of heated oil press only needs five minutes.
Moreover, the heater is also helpful for increasing oil output. Especially for lower oil-bearing oilseeds, such as soybean, cotton seeds.
INTEGRATED OIL PRESS
The integrated Vegetable Oil Presses are advance model from the oil press. These include motor, vacuum filter, heater and electric control cabinet. The assistant part can help the oil press with higher output. The function of the vacuum oil filter used to filtrate the crude oil which come out from oil press. They are an ideal choice for customers.
These vegetable oil processing plants are with big capacity which mostly use in
middle-large scale oil plant. They can be divided into two kinds: One is hot processing, which includes steam cooker and oil press. The steam cooker is used for oilseeds pretreatment before pressing. The other is the cold processing. The advantage of this kind of machine is lower temperature when press the seeds. It is about 80 degree, which can protect the nutrition element in the oil.
These are oil plants with big capacity, high oil output, low oil residual, light processed fats color, good quality, rich nutrient.