The Journey of Coffee Beans in Color Sorting Machines

How Color Sorters Revolutionize Coffee Industry?

When a coffee bean travels from the farm to your coffee cup, the color sorting machine serves as a key guardian of quality control. This high-precision equipment, powered by AI-driven optical recognition technology, can sort beans at an ultra-high speed of 600 beans per second, eliminating defective beans while preserving their premium flavor.

Stage 1: Optical Inspection

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1.Vibratory Feeding
The color sorting machine employs an electromagnetic feeder to evenly distribute coffee beans across the conveyor belt, ensuring each bean is fully exposed to the detection range of the industrial-grade CCD camera.

2.Multispectral Scanning
Utilizing dual-band scanning technology that combines Near Infrared (NIR) and Visible Light spectra, the system achieves precise identification of:

• Uneven Roasting
• Moldy Beans
• Foreign Materials

Stage 2: Intelligent Sorting

Defect Removal Process
When the system detects a defective bean (with 99.98% defect recognition accuracy), it triggers the corresponding unit among 128 pneumatic ejectors within 0.003 seconds. By calculating the bean’s trajectory, defective beans are precisely ejected into the rejection channel, while premium beans continue uninterrupted to the packaging stage.

Stage 3: Quality Assurance

Modern color sorters are equipped with a Dual-Check System:

• Weight sensors monitor fluctuations in production output.
• A re-sorting module conducts a second inspection.
• Quality reports compatible with the Manufacturing Execution System (MES) are automatically generated.

Economic Value of Color Sorting Technology

According to the data from the International Coffee Organization (ICO), the use of color sorters can:

• Increase the output rate of premium coffee beans by 23%.
• Reduce the cost of manual sorting by 67%.
• Decrease the customer complaint rate by 91%.

Technical Specifications Comparison