- Integrated Screw Oil Press
- Screw Oil Press
- Home Use Oil Press
- Hydraulic Oil Press
- Oil Seeds Roasting Machine
- Oil Cakes Feed Pelletizing Machine
- Edible Oil Production Line
- 10-20T/D Edible Oil Production Line
- 30T/D Edible Oil Production Plant
- 50T/D Edible Oil Production Plant
- Edible Oil Refinery Plant
- 1-5T/D Edible Oil Refinery Plant
- 10T/D Edible Oil Refinery Plant
- 20T/D Edible Oil Refinery Plant
Most kinds of edible vegetable oil in our daily life are hot pressed, which means roasting the oilseeds before pressing, while cold pressing is without roasting. The oilseeds must be evenly roasted. Their water content, temperature and structure should meet the requirement of oil pressing. The effect has direct influence on the smooth progress of the whole process of oil production, the oil yield, and the quality of oil as well as oil cake. By roasting the oilseeds, the oil yield can be largely increased, and the oil yield of hot pressing is twice that of cold pressing.
How Does Roasting Increase the Oil Yield?
On the other hand, the crude oil by cold pressing has a shallow color and there are few impurities in it. It does not need to be refined. Filtering it can reach the standard of edible oil. Cold pressing is suitable for small breed oilseeds or top grade health care oil for which heating is not good, such as olive oil, flax seed oil and safflower oil. Oilseeds that have high content of oil are mostly cold pressed, and the denaturation of protein is small. Peanut and sesame which contains rich oil are often hot pressed to get nice flavor.