Patent ID: 11033937

Abstract:
Provided is a color sorting machine capable of properly removing foreign mater even when the specific gravity of the object to be sorted is low. A color sorting machine M1 removes foreign matter F in the object to be sorted being conveyed from a conveyance route G into a removal route R. The color sorting machine M1 is equipped with a supply portion 1 supplying the object to be sorted to the conveyance route G, a sorting portion 2 surrounding a sorting region R and partially formed by transparent walls 21a and 21b, a first conveying portion 3 surrounding the periphery of the conveyance route G to the sorting region R, a second conveying portion 4 hermetically surrounding the periphery of the conveyance route G from the sorting region R, a removing portion 5 hermetically surrounding the periphery of the removal route D extending from the sorting region R, an air intake port 32, a detection device 6 optically detecting the foreign matter F in the object to be sorted, a removal device 7 having an ejection port 72 hermetically inserted into the sorting portion 2, and a first suction device 8 provided in the second conveying portion 4 and sucking in the air in the conveyance route G to thereby generating an airflow heading for the second conveying portion 4 from the air intake port 32.