Oil squeezing is to squeeze oil out of oil with the help of mechanical external force.
Classification of hydraulic press:
First, hydraulic oil.
Also known as hydraulic oil press, it has been basically replaced by screw oil press. It belongs to static oil production, with low oil yield, small single machine energy, many equipment, large area, workshop insulation and poor operating conditions. Hydraulic machine-made oil has the advantages of simple structure and energy saving, and can be applied to the grinding and pressing oil of some scattered oils (such as rice bran and wild oils) and oils that need to maintain special flavor or nutrition (such as cocoa beans, olives and sesame seeds). In addition, it can also be used to press and separate solid fat or wax skin.
Second, spiral oil recovery.
Screw oil press Screw oil press is a widely used oil press at present. It has the advantages of large continuous processing capacity, short dynamic pressing time, high oil yield and low labor intensity.
The main part of the screw oil press is the press chamber, which consists of the same press cage and the screw shaft rotating in the press cage. Its working process is to reduce the space volume of the compaction cavity by decreasing the pitch of the screw shaft or gradually increasing the diameter of the tooth root circle, thus producing compaction effect; The squeezed oil flows out from the gap of the press cage, and at the same time, the residue is pressed into broken cakes and continuously discharged from the end of the press shaft. Generally speaking, oil extraction by pressing can be divided into three stages, namely, feeding (preloading) stage, main pressing (oil extraction) stage and filter cake forming (high pressure oil discharge) stage.
Third, the new hydraulic oil press
At present, a new type of hydraulic oil press has appeared in the market, which has improved the shortcomings of hydraulic oil press in all aspects. The single machine consumes very little power, occupies only a few square meters, and is connected with a computer controller, thus realizing the automation of production. This kind of hydraulic press continues to maintain the advantages of simple structure and long service life of hydraulic press. The oil produced is more fragrant than the ordinary oil press, and it does not bubble when eaten, which is widely welcomed by consumers.
Fourth, high-efficiency fine filtration oil press
Adopt the principle of multi-stage propulsion and gradual pressurization, increase the pressure in the pressing chamber, and squeeze and squeeze grease to the maximum extent; In order to prevent the extruded oil from re-soaking into the dried cake residue, a unique oil guide groove is designed in the press chamber of the equipment, which makes the oil and cake separate quickly and greatly improves the oil yield. This design has won the national utility model patent.