Bottle-to-bottle recycling and food-grade packaging production demand a level of rPET purity that goes far beyond what conventional polymer sorting can achieve: aged, yellowed flakes and flakes containing optical brighteners (OBA) are virtually invisible to conventional optical sorting systems. Yet even trace amounts of such contaminants can cause visible color differences in finished products, compromise food-contact compliance, and even downgrade recycled material from premium food-grade to lower-value non-food applications. For recyclers serving the bottle-to-bottle recycling and food packaging supply chain, the ability to detect and remove these visually near-invisible defects is the key to producing AAA-grade rPET that meets food-contact regulations and the stringent requirements of brand owners.
The Grün VPF Series is a machine-vision-based sorting system tailored for this exact scenario. It employs advanced UV imaging technology to perform real-time scanning and fluorescence feature analysis of plastic flakes, and combined with high-performance air ejectors, achieves high-precision removal of aged, yellowed flakes and OBA-containing flakes within milliseconds.
Technical Features
● Tailored Machine-Vision-Based Sorting System for PET Flakes
✦ High-Performance Vibratory Feeding: Evenly spreads plastic flakes into a single layer, effectively reducing material overlap and providing a stable material posture for high-precision detection.
✦ Sealed Camera Chamber and Electrical Cabinet Design: Ensures stable operation of internal optical components and electrical systems, adapting to the dusty environment of plastic flake processing workshops.
✦ Integrated Self-Cleaning: Automatically cleans the camera chamber glass, continuously maintaining a clear detection zone, reducing manual intervention and downtime for cleaning, and ensuring continuous and stable equipment operation.
✦ Multi-Specification Model Portfolio: Offers configurations with 4, 6, 8, and 10 chutes to meet varying throughput requirements.
● High-Precision Fluorescence Inspection System
✦ Captures fluorescence signals with 0.1mm² resolution for efficient detection.
✦ Detects weak fluorescence generated by aged PET under UV LED excitation.
✦ Detects intense blue-white fluorescence generated by OBA-containing PET.
● High-Performance Air Ejector System
✦ Optimized Design: The ejector valve structure is optimized to balance durability, response speed, and air consumption efficiency, maintaining stable performance even under long-term, high-frequency operation.
✦ High Efficiency and Stability: Optimized for high-throughput sorting conditions, it maintains stable ejection performance within reasonable parameter ranges, balancing throughput and sorting accuracy.
✦ Cost Reduction: Significantly reduces the false reject rate, minimizing raw material waste from good products being incorrectly ejected, while optimizing air consumption to reduce overall operational costs.
● 15-Inch Industrial Touchscreen Control System
✦ Intuitive Interaction: User-friendly human-machine interface (HMI) with multi-language support.
✦ One-Click Switching: Quickly recalls sorting parameters for different products.
✦ Comprehensive remote support:
✩ Remote access and real-time monitoring
✩ Performance data dashboard
✩ Online expert diagnostics
✩ Interactive troubleshooting
Applications
Specifications
Chute
Throughput
(t/h)
Air Pressure
(MPa)
Air Consumption
(m3/min)
Power
(kW)
Unpacked Weight
(kg)
Dimension
（mm）
Grün VPF1
1255×1670×1995
1804×1823×2007
Specifications are approximate and subject to change without notice. Lauffer Vision reserves all rights for modifications.
Model
Air Nozzle
1
64
0.4~0.8
0.6~0.8
<1.0
0.9
680
Grün VPF4
4
256
1.0~4.0
0.6~0.8
<2.0
3.0
1082
Grün VPF6
6
384
2.0~4.0
0.6~0.8
<3.0
4.4
1390
2434×1823×2007
Grün VPF8
8
512
3.0~6.0
0.6~0.8
<4.0
5.9
1750
3064×1823×2007
Grün VPF10
10
640
4.0~8.0
0.6~0.8
<5.0
7.3
2138
3734×1823×2007
