After the normal operation of the seed oil press , high oil content of fuel oil are mostly concentrated in the circle of rows and rows of the former group . Office of the oil drain out 60% of the total amount of oil , place the front row of the group round about 30% ; while the end of the discharge of oil is small, not a drip line , oil color is very clear . Repeated two or three times to be pressed rapeseed or soy Youzha do , during which people can be uniformly doped material embryos squeeze more oil diesel . To maintain uniformity when cutting , avoid erratic , otherwise it will affect the life of the oil press and oil yield .
During operation should always check out the oil press cake cases and controls billet is neither too high nor too low moisture . The cake should be normal flaky , pressed by the screw shaft side smooth , the other side has a lot of hair pattern. If the cake loose weakness, or a shapeless cake , darker color , hand pinch Serve fragments , indicating that add little water blank ; such as the cake soft, flaky increase in National Cheng Kung University , or the oil bubble, Minga said that too much water . Under normal circumstances, no or very little residue circular row between the slag , slag in place of discharge , such as slag was fine flakes description more water, the powder residue then the less moisture. In addition, the position of the oil changes can be squeezed out of the water to see if appropriate , when pressed into the water is too high or too low , the oil locations are backward .