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GLOSSARY OF EQUIPMENT 98-99 TYPES There are two types of ballistic separators: • Single group of inclined paddles driven by the same crankshaft. • Two groups of inclined paddles driven by different crankshafts; the first group has a smaller inclination and sifts, distributes and regulates the stream feeding the second group of light flat materials with a greater inclination, where the rolling and light flat materials are classified and the fine materials are sifted. • Two groups of inclined paddles driven by two different crankshafts with a similar inclination, performing two consecutive ballistic separations. In this case the mesh opening of the first ramp has a greater size than the second and separates materials with a larger size. This option allows the obtaining of an additional current for larger flat materials. CHARACTERISTICS • Capacity. The processing capacity of the ballistic separators ranges depending on the model from 60 m³/h to 200 m³/h. Considering an input density at this machine in package sorting plants of about 50 kg/m³, maximum capacities of 3 t/h to 10 t/h are obtained. • Sifting area. This constitutes the total area of the perforated blades with a specified mesh size. It has been empirically tested that the optimum mesh size in package sorting plants is 40mm, as a greater mesh size results in losing small packages, while a smaller mesh size results in increased maintenance to prevent obstructions. The sifting area of a ballistic separator is related to its capacity. Thus, ballistic separators with a smaller capacity have a sifting area of about 9 m², while those with large capacity have sifting areas of about 28 m². Blind ballistic separators are also present in light weight packaging sorting plants. This is a ballistic separator in which the ramps do not perform sifting, such that only the rolling and light flat fractions are obtained. • Paddles and ramp. As mentioned above, the sifting area of the ballistic separator consists of ramps that in turn consist of paddles. Depending on the number of ramps, the ballistic separators can have one, two or more parallel ramps or consecutive ramps. The ramps are formed by paddles. These paddles generally have a size of about 450 mm. The number of paddles is related in general to capacity. Ballistic separators with smaller capacities have 4 paddles in each ramp, while those with greater capacity can have up to 12 paddles per ramp. • Slope. The slope of the ballistic separator is the inclination of the ramps in which the ballistic and grain size separation is performed. The optimum inclination depends on several factors, such as the constructive details of the ballistic separator LIGHT WEIGHT PACKAGING SORTING PLANTS


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