Manual book of oil press
8
3. Groundnut kernels
The groundnut kernels shall be soaked before cooked. During the cooking, they
shall be added right amount of water to make them keep good flexibility and
sufficient moisture. When the kernels can separate from the skin and crush into two
half by pinching, they can be pressed. The cake thickness shall be 0.7mm with strip
regulating. And the oil output is smooth.
4. Soybean
The oil material shall be cooked to be light yellow before being cooked, and the
temperature shall be 100-120
℃
, and the cake thickness, 0.7mm. It shall be pressed
out of all oil only for one time. But the cake materials pressed for one time is too
parched, lots of proteins are lost. Therefore, twice press method is generally adopted.
The soybean shall be 60-70% cooked. The temperature for press shall be 80-100
℃
,
moisture, 5-6%, the cake thickness each time 1.5-2mm and the cake thickness for the
second time, 0.7mm. The cake is with strip regulate shape. The oil yielding rate is
high, and the handling capacity, great.
7
．
Troubleshooting:
Failure
Causes
Removing
Worm axle is stuck
1.
Overfeed, especially
when temperature is
not raised sufficiently;
2.
Belt becomes
loose/slippery
3.
Debris, iron scale etc
enters chamber
1.
Close feed plate and
open discharging plate;
adjust screw
clockwise; back drive
to reverse the main
shaft, so oilseeds stuck
in worms is discharged
from discharge
opening which is then
closed; then feed
oilseeds slowly until
the load is normal.
2.
Adjust belt tension;
3.
Pull out worm and
clear the chamber and
worm of materials.
Oilseeds to be pressed
must be selected
carefully.
No oil out or low oil
yielding rate
1.
Temperature in
chamber is over low;
2.
Oilseeds are over-dry
or over-wet;
3.
Oilseeds are moistened
1.
Raise the temperature;
2.
Regulate water
content;
3.
Oilseeds which have
gone bad should not be