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 sensor-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 Sensor-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 System
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, meeting diverse 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.
● In-House High-Performance Air Ejector System
✦ Optimized Ejector Valve Design
Balances durability, response speed, and air consumption efficiency, maintaining stable performance even under long-term, high-frequency operation.
✦ High-Speed, High-Precision Ejection
Delivers millisecond-level response and precise material rejection, ensuring optimal sorting accuracy even under high-throughput conditions.
✦ Reduced Operating Costs
Significantly lowers the false reject rate, minimizing material waste from good products being incorrectly ejected, while optimizing air consumption to reduce overall operational expenses.
● 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
