New vision sorting of plastic pellets by shape was introduced at the K 2007 show in Germany last fall by Buhler Sortex of the U.K. (U.S. office in Stockton, Calif.). Shape recognition has been used in the food sector to spot defective vegetables of the same color. It has been adapted to plastics for about six months. The first commercial installation is being tested with a U.S. company to remove double, triple, or quadruple pellets, which can wiggle through vibrating screens. The system uses the same vision sorting camera and lighting as Sortex’s bi-chromatic camera (see p. 64), but with different software. (209 983-8400 • www.sortex.com
Pudding Mill Ln. London E15 2PJ, England, United Kingdom
Editor PickThe Need for Generalists: Part 4
Solving problems generally requires distinguishing good samples from bad ones. But that can become clumsy when one person runs the test while another analyzes the data.