GRANULAR MATERIAL SORTING METHOD AND GRANULAR MATERIAL SORTING DEVICE

摘要

PROBLEM TO BE SOLVED: To enable classification of defective products from foreign matter to be performed, which has been a separate work without wasting time for the work of removing foreign matter from among defective products, without adopting a new device separately from a color sorting device for it and without largely changing the constitution of a conventional granular material color sorting device capable of sorting defective products from foreign matter, by only adding some to the conventional device.;SOLUTION: This granular material sorting device is provided with: a feeder 3 for transferring raw material to be sorted containing good products/defective products of an object to be sorted and other foreign matter; an optical part 5 for irradiating visible light and near infrared light to the moving raw material to be sorted; a controller 19 for subjecting optical information obtained from the raw material to be sorted to light receiving analysis; a solenoid valve 15 and an injector 13 for removing and sorting defective products from the raw material to be sorted based on analysis results of the optical information concerning the visible light received by CCD sensors 11a, 11b; and a solenoid valve 14 and an injector 12 for removing and sorting foreign matter from the raw material to be sorted based on the analysis results of the optical information concerning the near infrared light received by light receiving NfR sensors 10a, 10b.;COPYRIGHT: (C)2000,JPO