It is common to place a rejector system after an inspection system at the food facility for the below reasons.
1. Prevent the production downtime from stopping the line when the error occurs.
2. Prevent a careless mistake (put back defective products to the line) by an operator.
The most common type of rejector is the flipper. NG products are pushed aside by the rejector gates (arms). It is ideal for products in boxes and thick bags.
The rejection conveyor drops down to reject NG products. It is ideal for products in thin bags.
Up and Out Type
The rejection conveyor flips up so that the NG product drops out of the line. It is suitable for products in thin bags.
Introduction video: Up and Out Type
Air Jet Type
NG products are blown sideways off of the line by a powerful blast of air. It is ideal for small, lightweight packaged products at high speed.
Introduction video: Air Jet Type
In this unusual belt method, NG products are carried off either left or right by belts running crosswise to the product flow. It is suitable for rejecting large packaged products.
NG products are pushed off the line sideways by the action of a gate attached to an air cylinder. It is suitable for rejecting products in packages and thick bags.
Introduction video: Pusher Type
This method uses a turning gate to reject NG products. It is suitable for rejecting products in large packages and in thick bags at comparatively highspeed.
NG products are sorted horizontally without any shock due to rejection. Since the rejection process doesn't cause any damage, it is ideal for fragile products.
Rejected products fall when the chute is reversed. It is ideal for rejecting relatively light bulk products.
Introduction video: Chute Type
The conveyor on the rejector slides to let the rejected products fall during the rejection. It is ideal for unpackaged animal products and sticky bulk products.
Introduction video: Shuttle Type