The Malaxer is an assembly of units where the olive paste becomes a mixture of free oil, vegetation water and solids, ready for oil extraction. Each malaxer contains a helical screw, moved by a fixed speed gear motor, and specially shaped to gently move and mix the paste: the aim is to obtain a constant temperature distribution, efficient oil releasing and surfacing, while avoiding the paste oxidation. Each malaxer unit has a water jacket connected with a closed loop heating system, to maintain the olive paste at the desired temperature level. The hot water is circulated by a circulation pump to keep the temperature level set by the operator, according to the reading of temperature sensor. A window with anti-condensation glass allow the visual control of the condition of the paste inside each malaxer unit. Each part of the malaxer is made of stainless steel and food grade material. The Malaxer is connected to the general control panel, which may have a peripheral touch-panel and/or display mounted on the malaxer, to display and control all the process parameters.
After Crusher, crushed olives can be transferred to the Malaxer in both manual and automatic ways. In manual models, the Olive Crusher is located onto the malaxor and the crushed olives are dispensed to fill the malaxer units with a horizontal screw conveyor mounted on the malaxer. In automatic models, the Crusher is outside and on the ground, crushed olives are transferred to the malaxer units by the control of pneumatic valves. The olive paste filled into the malaxer is expected to be kneaded gently by means of internal screw to release oil for a certain period of time. Matured olive paste is delivered to the decanter under operator control, this is achieved by opening the valve located at the bottom of the malaxer. Horizontal conveyor, mounted below the malaxer, empties each malaxer unit by driving the paste to the paste pump that feed the decanter. Feeding and discharge timing, sequence and kneading time is determined by the operator. A sensor system prevents any losses, stopping the conveyor and crusher in case of malaxer overload, while signaling when a malaxer has been fully emptied. Each malaxer has a system to wash the internal surfaces of the malaxer, made by water spray pipes, which is controlled manually.The water temperature in the water jackets of each malaxer unit is controlled by separate pumps and is suitable for adjusting olive temperature according to customer demands, this condition is optional.