Fresh Coffee Beans Grading Machine

Fresh Coffee Beans Grading Machine

Hebei Julite Sorting Technology Co., Ltd. presents its Fresh Coffee Beans Grading Machine, engineered to sort green coffee beans by size, density, and color—key factors that influence roasting behavior and cup quality. This multi-stage grader ensures uniform batches for consistent roasting profiles.

Grading Process Flow

1. Vibratory Pre-Screening:
   Beans pass over adjustable sieves to remove oversized debris—twigs, stones—and undersized fines.

2. Density Grading Section:
   A gravity-based airflow module stratifies beans by density. Denser beans, which generally produce more consistent roast characteristics, settle in the lower stream; lighter beans are diverted to a separate outlet.

3. Size Classification:
   Multi-deck screening units with interchangeable mesh sizes separate beans into uniform size fractions (e.g., screen sizes 15/16, 16/17). Even bean size supports uniform heat absorption during roasting.

4. Optical Color Sorting (Optional):
   High-resolution cameras under controlled LED lighting detect discoloration, insect damage, and black or immature beans. Automated air-jet ejectors remove defects at high throughput.

5. Final Packaging Feed:
   Graded beans are collected in separate hoppers or bulk-bag filling stations, ready for shipment to roasters or further processing.

Key Features

• Adjustable Grading Parameters: Operators control airflow rate, sieve vibration intensity, and optical sorter sensitivity via a centralized PLC/HMI interface. Preset profiles simplify changeovers between bean origins.

• Hygienic Construction: Contact parts use food-grade stainless steel with sanitary welds. Slide-out sieve decks and inspection panels enable rapid cleaning during origin changes.

• Gentle Handling: Low-impact conveyors and controlled vibration minimize bean abrasion, preserving bean integrity and quality.

• Scalable Throughput: Models range from 0.5 t/h pilot machines to 5 t/h commercial graders, accommodating specialty producers and larger green-bean warehouses alike.

Advantages for Coffee Processors

• Enhanced Consistency: Uniform bean batches help roasters achieve stable roast profiles and flavor consistency across lots.

• Quality Assurance: Optical sorting removes defects that can cause off-flavors, reducing waste and maintaining cup quality.

• Operational Efficiency: Integrated grading stages combine density, size, and color separation in one footprint, saving space and labor.

Hebei Julite Sorting Technology Co., Ltd. supports each Grading Machine with site planning, installation supervision, and operator training, ensuring that green-bean processors can deliver consistent, defect-free products to their roasting partners.