01
Application context
Why is rejecting necessary? Rejecting is a necessary step in any production line to help increase the quality of a business’ output. Not all products are fit to be sold in a marketplace, with some estimates putting 2 percent of output as rejected parts.
Products may be rejected by sight for reasons such as an irregularity or deformity. They may be rejected because of improper weight or missing caps, flaps or labels as well as because of incorrect or unreadable barcodes. Products may also fail a safety test such as by metal detection or X-ray.
02
Design considerations
The most popular conveyor reject mechanisms are air blast, pneumatic pusher, overhead sweep, pneumatic retract, pivot down/up and linear actuating.
Custom reject conveyors make it possible to maximize application performance. Each product’s individual characteristics and weights impact the type of retract, the distance and move required to reject, and the speed of the move.