Grading And Sorting Machinery

In View huge production of potato and onion produces and demand of graded and quality products, it has become necessary to install grading and sorting plant. It also facilitates to weigh and pack bags, ranging from 1 kg to 50 Kg as per demand of market, with installation of electronic weigh-bagger.

Sorting of produce is carried out either manually or by automatic electronic sorters to classify produce by size, shape, colour, surface damage, ripening etc. In case of manual sorting, roller conveyors are used in which rollers while carrying the produce rotate the pieces to allow exposure of their all sides of surface. With this type of equipment, mostly all undesired product is separated by trained persons, under proper lighting.

Belt conveyors are also used for manual sorting, but they are not as efficient as roller conveyor. In case of electronic sorter, it has conveyor system facilitating passing of each piece under lights and camera, which sense the programmed defects and rejects them by means of pneumatic ejector systems.

Normally all size graders are designed to classify produce by diameter or width. However graders for classification by lengths are also available. All these graders use elements like screen mesh, perforated belt, plain rollers, taper rollers, diverging space, traveling chains, rotating rollers, vibratory trays etc. for separating fruits and vegetables to suit size and shape.