Industrial rejector systems for weighing, inspection, and packaging lines
Since 2002, we have designed and built in‑house rejection modules that remove non‑conforming items directly on the conveyor. These systems integrate with checkweighers, X‑ray inspection, metal detectors, and standard packaging conveyors to boost throughput, cut manual sorting, and protect product quality across fruits and vegetables, snacks, pet food, pasta, frozen foods, and seafood.
What the system does and where it fits
The unit removes underweight or overweight packs, out‑of‑tolerance fills, defective containers, contaminated products, damaged seals, mislabelled items, and deformed packs. Installed after a checkweigher, X‑ray, or metal detector, it ensures only in‑spec items continue downstream. Reject confirmation sensors and fail‑safe logic help prevent escapes and record each removal.
Mechanism options
- Air blast: Non‑contact ejection for lightweight pouches, sachets, bottles, and cans. Adjustable valve timing and nozzle position support fast or multi‑lane lines with efficient air use.
- Pusher: Positive control for heavier cartons, trays, and bags. Robust linear actuation and guided rails stabilize product at higher speeds.
- Drop gate (flap): A gate in the belt or chute opens to drop non‑conforming items into a secure bin. Compact and gentle for small pouches, flow‑wrapped packs, and net bags.
- Diverter/sweep arm: Redirects items to a side lane or bin. Flexible for mixed sizes and available in single‑ or multi‑segment layouts for continuous operation.
Single and multi‑segment configurations
- Single segment: Compact footprint for a single lane, ideal after a stand‑alone checkweigher or metal detector.
- Multi‑segment/multi‑lane: Isolates rejection by lane or segment to minimize disturbance to good product and support parallel lines or staged quality sorting.
Integration with weighing and inspection
Checkweigher, metal detector, and X‑ray modules pair natively with multihead or linear weighers. Image processing, edge shielding, and product‑effect compensation with DSP and microprocessor control help maintain high detection accuracy with low false triggers, so only truly non‑conforming items are removed.
Construction, hygiene, and controls
Frames are built in SUS304 or SUS316 stainless steel with IP65 protection for washdown use. Designs support FDA, HACCP, and GMP programs. A 7‑inch multilingual touchscreen simplifies setup, recipes, and quick changeovers. Standard I/O and fieldbus options synchronize with upstream signals. Logs, alarms, and beacon indicators aid maintenance and traceability.
Sizing, options, and accessories
Systems are available in multiple conveyor widths, speeds, and lane counts. Each unit is configured to your pack dimensions, line spacing, and throughput.
Options include clean‑air conditioning, noise reduction, guarded and interlocked reject bins, bypass mode, and verification sensors. Accessories such as adjustable side rails, covers/guards, jam detection, air regulators and silencers, caster‑mounted frames, and event tracking are available.
Benefits and expected outcomes
An integrated design can increase capacity, reduce manual labor, and stabilize quality. In suitable applications, customers have achieved up to a 30% throughput lift, notable labor savings, and high pass rates, while documented removals support recall prevention and reduce rework.
Installation and support
We define the optimal mechanism and footprint during pre‑sales consultation. Production, delivery, and on‑site commissioning follow, with global after‑sales service in more than 100 countries. Units connect seamlessly to packaging conveyors, elevators, VFFS baggers, and end‑of‑line robots.
Industries and packaging
These solutions handle bags, pouches, cartons, trays, bottles, cans, and net bags in ambient, chilled, or frozen environments across fresh produce, snacks, pet food, pasta, frozen foods, and seafood.
How to choose the right system
- Product and pack: Match the mechanism to pack rigidity, sealing, and surface to eject decisively without damage.
- Speed and spacing: Balance conveyor speed, sensor response, and actuator travel time. Maintain adequate gaps for precise timing.
- Detection source: Align trigger logic with checkweigher, metal detector, or X‑ray outputs. Use verification sensors to confirm each removal.
- Hygiene and guarding: Select the stainless grade, IP rating, and guards to fit washdown routines and audit needs.
- Footprint and access: Reserve space for the unit, bin access, and maintenance. Plan bypass mode and safe‑stop strategies.
FAQ
Q: How do you validate handling and rejection for my product?
A: We test with your samples to confirm transport stability and reject accuracy before shipment.
Q: Can one unit handle multiple pack sizes?
A: Yes. Recipes and adjustable guides support fast changeovers across defined size and weight ranges.
Q: What IP rating is available?
A: Standard builds are IP65 for washdown. Alternative protections can be discussed if your environment requires them.
Contact rejector manufacturer
To discuss your application or request a quote, contact our rejector manufacturer team. We will recommend a configuration, confirm performance with samples, and provide a clear proposal.
Our high-performance Rejector systems are purpose-built to deliver 100% reliable, precise removal of non-conforming products, working seamlessly with our metal inspection and X-Ray Inspection equipment to complete your end-to-end product safety solution, protect your brand, and ensure full compliance with global food safety and pharmaceutical standards. Our industrial Rejector lineup includes a full range of configurations—air blow, pusher, flap, diverter, drop-through rejectors—engineered to handle every product type, packaging format, and line speed, from delicate loose products, soft pouches, and rigid containers to bulk goods and high-speed pharmaceutical blister packs. Built with food-grade 304 stainless steel, our Rejector systems are designed for smooth, crevice-free, easy-to-clean design that meets strict sanitary requirements for food and pharmaceutical manufacturing. Unlike competing rejectors with inconsistent triggering, misaligned rejection, and high product waste, our systems feature precision timing and smart sensor technology to ensure only non-conforming products are removed, with zero impact on adjacent good product. Our Rejector systems also include integrated reject verification, lockable collection bins, full data logging for complete traceability, seamless integration with your existing lines, and modular design for quick installation. Whether you need a standard off-the-shelf Rejector or a custom solution for your unique production line, our range delivers the reliability, accuracy, and durability you need to safeguard your products and bottom line. Explore our individual Rejector models to find the perfect match for your operation.
