How to extract oil

The traditional process of oil extraction?

A traditional handmade oil press consists of a double stove, a milling board, a large press tank and a hanging oil hammer. The oil presses are usually built on the banks of small streams where villages are concentrated, water is plentiful and trees cover the area. The oil pressing usually begins at the end of the fourth month of the lunar calendar every year.

The traditional oil extraction process can be roughly divided into seven steps: (take vegetable oil extraction as an example)?

First, frying dry. The collection of raw wet rapeseed into the stove in the cauldron fried dry, fried dry standard is fragrant and can not be burnt, pay attention to control the size of the stove fire, which is related to the ability to squeeze out of the fragrant and pure oil, controlled by a master. The second, grinding powder. Second, grinding powder. It is to throw the fried dry rapeseed into the milling trough and crush it. Mill power by the waterwheel (the initial power is ox-drawn, then the waterwheel drive, now developed to electric) drive, waterwheel and milling diameter are generally more than 4 meters, milling on three milling wheels, all the components are made of wood. By the waterwheel as the power of crushing rapeseed once about 30 minutes. (Oxen pull about an hour, electric about 10 minutes) by a master control.

Third, steam powder. Rapeseed crushed into powder after using a wooden cauldron into a small pot steamed, generally a cake at a time, about 2 minutes, steamed standard is to see the steam but not cooked through, by a master control.

Fourth,

Making cakes.

The steamed powder is filled into a round iron hoop with a straw base and made into a cake,

one press

50

cakes,

from the start of steaming the powder to the completion of

50

cakes takes

2

hours. It is controlled by one master.

Fifth, into the press. The cake is loaded into a trough hewn from a piece of wood, and a wooden wedge is installed on the right side of the trough to start the press.

Handmade oil press "host" is a thick "oil trough wood"

, the length must be

5

meter or more, the diameter of the cut surface can not be less than

1

The tree's center is cut out into an oil tank

2

meters long and

40

centimeters wide

, and the embryo cake is filled into the oil tank, and when it's time to open the press, the master, who is holding

the hammer, will hold on to the oil tank for a while.

Hammer masters, hanging in the air about

30

pounds of oil hammer, leisurely into the oil tank "into the pile", so the

Squeezing of the embryo cake will flow out of a Lou Lou golden oil, oil from the oil tank in the middle of the small mouth out. It is controlled by a master.

Sixth,

Out of the press.

After

2

hours,

the oil is almost exhausted,

then it can be out of the press.

Out of the press in the order of,

first withdraw

"wood into"

,

then withdraw the Wooden Stake, and lastly, the Pie.

Seventh, into the tank. Pour the pressed vegetable oil into the vat and keep it sealed.

The above seven steps is a complete traditional oil extraction process,

With this wooden press in the extraction of sesame oil and mechanical pressing of sesame oil

there is a big difference,

It is golden in color and flavor,

Low heat,

Barrels low no canola deposits,

And the time of shelf life is also

Lower than the machine pressing,

And the time of the machine pressing. longer than machine pressed

canola oil.

.