The crushed pulp, juice and skin enter the double screw juice extractor through the feed hopper. As the bottom diameter of the screw gradually increases along the direction of the residue outlet, the screw pitch gradually decreases. When the material is pushed by the screw, the spiral chamber shrinks, forming the material press. The rotation direction of the spiral spindle is counterclockwise when looking from the feed hopper to the slag chute. The raw materials are added into the feed hopper and pressed under the promotion of the screw. The squeezed juice flows into the juice container at the bottom through the filter screen, while the waste is discharged through the annular gap formed between the screw and the tapered part of the pressure regulator. The pressure regulator moves along the axial direction and is directly controlled by the hydraulic system.
The juice yield can be changed by adjusting the pressure of the hydraulic system, that is, adjusting the slag discharge resistance. However, if the pressure of the hydraulic system is too high, the particles of some slag will be squeezed out together with the juice through the filter screen under strong extrusion. Although the juice yield increases, the quality of the juice will decline relatively. The pressure of the hydraulic system should be determined according to the user's specific process requirements. So as to achieve the purpose of automatic separation of juice and residue.
