Recycling of scrap
AssigneeReukema Participations B.V.
InventorsPeter Carlo REM, Yongli WU, Francesco DI MAIO
Life of this patent
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Abstract
A method of recycling scrap is disclosed, comprising the steps of shredding the scrap with a shredder into shredded scrap objects, classifying the shredded scrap objects into fractions of scrap objects having different size ranges with a classifier, and sorting scrap objects while substantially maintaining interspace between the objects. Further, a singulating arrangement for singulating scrap objects is disclosed, comprising a substantially horizontally disposed feeder that extends from a receiving area for receiving scrap objects to a feed gate positioned at a top portion of a chute, as well as an ejector arrangement, comprising a conveyor with a substantially flat conveying plane and an ejector device disposed along the conveyor.
Claims20
A method of recycling scrap, the method comprising:
- shredding the scrap into shredded scrap objects;
- feeding the shredded scrap objects downstream to a classifier for traveling downstream in the classifier;
- separating the shredded scrap objects into different size ranges of maximum pass through dimensions as the shredded scrap objects travel downstream in the classifier;
- removing a smallest size range of shredded scrap objects having a maximum pass through dimension of less than 50 mm leaving relatively large shredded scrap objects remaining in a plurality of size ranges of maximum pass through dimensions;
- feeding the separated relatively large scrap shredded scrap objects downstream to at least one chute that receives the relatively large shredded scrap objects at a wide upper entry opening and funnels the relatively large shredded scrap objects downward to a narrower lower exit opening to singulate the relatively large shredded scrap objects;
- and
- receiving the relatively large shredded scrap objects singulated from the exit opening of the at least one chute on at least one conveyor belt that has a faster downstream speed than that of the relatively large shredded scrap objects exiting the at least one chute to further promote singulation and increase the interspace between the relatively large shredded scrap objects for minimizing entanglement therebetween and providing ease of ejection of the relatively large shredded scrap objects from the conveyor belt.
A method of recycling scrap, the method comprising:
- shredding the scrap with a shredder into shredded scrap objects;
- classifying the shredded scrap objects with a size classifier including a plurality of sieve decks to separate the shredded scrap objects into a plurality of size ranges of maximum pass through dimensions as the shredded scrap objects travel along the sieve decks, the sieve decks generating a main group of size ranges of the shredded scrap objects with the shredded scrap objects having a relatively large size with maximum pass through dimensions of between 50-180 mm to allow for singulation of the shredded scrap objects in the main group of size ranges, and further generating a smallest size range of the shredded scrap objects so that the shredded objects have maximum pass through dimensions of less than 50 mm to avoid singulation of the smallest size range of the shredded scrap objects;
- and
- singulating the main group of size ranges of the shredded scrap objects by feeding the shredded scrap objects onto a faster moving downstream surface to create interspace between the shredded scrap objects on the faster moving downstream surface for minimizing entanglement between the singulated shredded scrap objects that may otherwise occur due to the relatively large size thereof.
A system for recycling scrap comprising a shredder for shredding scrap into shredded scrap objects, a size classifier including a plurality of sieve decks to separate the shredded scrap objects into a plurality of size ranges of maximum pass through dimensions as the shredded scrap objects travel along the sieve decks, the sieve decks generating a main group of size ranges of the shredded scrap objects with the shredded scrap objects having a relatively large size with maximum pass through dimensions of between 50-180 mm to allow for singulation of the shredded scrap objects in the main group of size ranges, and further generating a smallest size range of the shredded scrap objects so that the shredded objects have maximum pass through dimensions of less than 50 mm to avoid singulation of the smallest size range of the shredded scrap objects, and a sorter configured for singulating the main group of size ranges of the shredded scrap objects by receiving the shredded scrap objects on a moving downstream surface of the sorter for each size range to create interspace between the shredded scrap objects on the moving downstream surfaces for minimizing entanglement between the singulated shredded scrap objects that may otherwise occur due to the relatively large size thereof.
Dependencies are inferred from the claim text.