Rejectors

Inspection equipment detects contaminants or quality issues and rejectors remove the unacceptable products from the production line. The “no good” (NG) products are typically redirected into a bin, then can be analyzed, disposed of, or reworked.

Choosing The Right Reject System

Many factors determine which reject systems best fits an application, including the product and packaging, and production line conditions. To avoid needles rejection, waste or rework of good products, a system that is reliable and accurate is crucial. The type of inspection system also influences rejector selection. Anritsu makes sure there is sufficient time for the inspection system to process its result and send a signal to the rejector to remove the NG product. Inspection systems in many cases look for more than one issue, resulting in dual rejectors. For example, an integrated metal detector and checkweigher with different detection goals, will send NG products to a different bin for each inspection machine. In this case, metal contaminants to bin number one and over/under weight to bin number two.

Product Properties
Product dimensions, speed, weight, stability, and packaging must all be considered. For example, a tall, gusseted pouch might dictate a tall flipper to effectively discharge the product. Bulk flow products are often dropped down off the conveyor via chutes or retraction. Heavier products may be paired with strong pusher rejects.
Timing
Line speed, product length, product spacing, product distribution, and the companion inspection system all impact the reject timing, which heavily impacts reject selection. After the inspection system detects an NG product, a rejector needs enough time to react and complete its rejection cycle.
Production Line
Production line particulars offer another set of factors to consider in reject choice, including belt width, roller sizes, available line space, belt material, and air availability. Understanding if the product will be reworked is important as then product damage needs to be minimal during rejection.

Reject Solutions

Flipper
Our most popular rejector, flippers, push NG products off the line with gates or arms. Flippers work well with stable boxes and thick bags. Dual Flippers, two reject stations on a single conveyor, are excellent solutions offering competitive pricing and a compact footprint. High speed applications may switch to a single “reverse flipper” solution. Pairing with a metal detector is ideal as it only needs a single reject station. Both single and dual flippers can be air or electrically powered.
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Pusher
NG products are pushed sideways off the line by a gate attached to an air cylinder. Their strong construction and direct-action result in pushers often being used for heavier products. They are available as an integrated option with a conveyor or standalone kit to be mounted on a customer conveyor.
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Air Jet
Air jet rejectors use powerful blasts of air to push products off the line. Due to their high-speed capability they’re ideal for small and lightweight products. Air jets are available integrated with a conveyor or standalone kit to be mounted on customer conveyor.
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Retracting
Retracting rejectors are often used for bulk flow products where the end of the reject’s conveyor contracts quickly to allow the detected contaminant and small amount of product to drop down into a bin beneath the conveyor. Anritsu typically builds these units with solid frames and sanitary design to prevent pathogens and promote complete cleaning since they are normally used on unpackaged products.
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Drop Gate
Ideal for products in thin bags, drop gate rejectors feature a conveyor segment that swings down to allow NG products to drop below. It is important to allow sufficient clearance between the rejector and the subsequent conveyor.
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Drop Chute
Often used for lightweight bulk flow products, drop chutes rotate to allow rejected products to fall below.
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Carrier (Channelizer, Diverter)
The carrier rejects NG products to a different lane on the conveyor where the products are sent to a different line or station. This is often used for rework purposes. Their design allows them to gently reject products at higher line speeds.
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Stop Conveyor
The most rudimentary type of rejection is stopping the conveyor when NG products are detected. In manual workflows, the inspection machine can stop conveying and allow operators to remove the product or can be configured to send a stop signal to other locations on the line.
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Ball Valve For Pipeline X-Ray
Pumped products in pipeline X-Rays are usually paired with ball valve rejectors that dump the contaminant and a small amount of surrounding product from the pipe into a reject bin.
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Reject Bins
We offer a select of economical catalog reject bins as well as custom engineered sanitary bins that feature heavy duty solid construction, angled surfaces, and drainage slots. Bins can be purchased with or without locks. Electronic locking by user ID is also available on custom engineered bins as well as reject-verify and bin-full sensors.
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Sensors
An important aspect of any reject-solution is the ability to incorporate different quality driven sensors into the solution. For almost all reject-solutions, we can incorporate reject bin-full, low air pressure, and reject-verify sensors. Sensors can be invaluable in ensuring that the reject solution is functioning properly.
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Anritsu Academy

Learn more about our Rector systems and how to use them. Browse our selection of downloadable sell sheets, brochures, white papers, application reports, demo videos, and more.

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Explore Anritsu Products

M6 Metal Detectors

Simultaneous multiple frequency in every machine for outstanding metal detection

XR75 X-Ray Systems

Easy set-up, high performance, and the industry’s lowest false reject rates

SSV Checkweighers

Reduce cost of product giveaway from day one with our reliably accurate checkweighers

Combo Systems

SSV checkweigher and M6 metal detector combined in a single frame for an even smaller footprint

Reject Systems FAQ

Which reject is the best for my application?

This will depend on multiple factors including your budget, space, and lead time. Air blasts are economical, simple to operate and have great production rate flexibility.

Flippers are reliable, robust, cost effective, and can be delivered quickly. They can also handle higher production rates.

Dropouts have a small footprint, simple operation, gentle action, but are mainly limited to thinner, slow moving products.

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Interested in learning more about our inspection solutions or other products? Get in touch with us today!

Rejectors

Choosing The Right Reject System

Product Properties

Timing

Production Line

Reject Solutions

Flipper

Pusher

Air Jet

Retracting

Drop Gate

Drop Chute

Carrier (Channelizer, Diverter)

Stop Conveyor

Ball Valve For Pipeline X-Ray

Reject Bins

Sensors

Anritsu Academy

Quick-ship Air/Pusher Reject

Electronic Lock for Reject Bing

Explore Anritsu Products

M6 Metal Detectors

XR75 X-Ray Systems

SSV Checkweighers

Combo Systems

Reject Systems FAQ

Which reject is the best for my application?

What type of reject systems do you offer?

What type of reject system would you suggest for a high speed application?

Do you have rejects for washdown applications?

Do you have reject bins for your rejectors?

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