I spoke to a controls and automation company recently who was working on a project to separate packaged DVD’s and Blu-Ray discs on a conveyor. The two packaged products were intermixed on a conveyor, but needed to be separated prior to labeling, to ensure that the correct label was put on each package. They were planning to achieve separation by ejecting the Blu-Ray discs off the line, and allowing the DVDs to continue into the labeler. Then the collected Blu-Ray discs would be sent to a separate labeling machine.
Because the cases were laying flat on the conveyor, a flat air pattern would work well to achieve the proper ejection off the belt. A Model 110003 3″ Aluminum Super Air Knife was selected as the best choice for the application. It has instantaneous on/off response. So, the airflow can easily be precisely controlled by a PLC or sensor, and a solenoid valve. It also has a precise, forceful, and uniform airflow pattern. This will ensure that only the Blu-Ray discs were ejected, and that they were fully ejected, to prevent any process interruption.