Patent ID: 9566615
Date: 2017-02-14
CPC Classifications: B07C,G01N

Claim:
1. A resin piece sorting method comprising: an X-ray inspection step of irradiating a resin piece with X-rays including a first X-ray and a second X-ray having respective energy ranges different from each other and measuring a first transmission intensity which is an intensity of the first X-ray transmitted through said resin piece and a second transmission intensity which is an intensity of the second X-ray transmitted through said resin piece; a first determination step of making a determination as to whether said resin piece is a candidate for a useful resin piece, using said first transmission intensity; a second determination step of making a determination as to whether a resin piece identified as a candidate for a useful resin piece in said first determination step is a useful resin piece, using a differential value obtained from said first transmission intensity and said second transmission intensity; and a collection step of collecting a resin piece identified as useful based on a result of the determination in said second determination step.