The onion sorting and grading machine utilizes advanced roller gap adjustment technology, specifically designed for the automatic size sorting of spherical root vegetables and fruits such as onions, potatoes, and citrus fruits.
This machine achieves precise, damage-free grading through a physical gap principle, making it a core sorting equipment in agricultural product processing, packaging, and distribution.
Onion Sorting Machine Working Principle
- Progressive Roller Conveyor System: The conveyor belt uses parallel rotating rollers. Onions move smoothly forward on the rollers and rotate naturally, ensuring that all surfaces of each onion have the opportunity to contact the grading gap.
- Adjustable Gap Grading Zone: The spacing between adjacent rollers gradually increases from the inlet to the outlet. Onions smaller than the current gap naturally fall into the corresponding collection chute.
- Automatic Discharge and Collection: The machine sorts onions of different sizes and directs them through the corresponding discharge chutes into collection boxes, packaging lines, or conveyor belts, achieving fully automatic continuous sorting.
Core Advantages of the Onion Grading Machine
- Precise Grading Effect: Mechanically sorts into 3–8 sizes with ±2mm accuracy, meeting global market standards.
- Zero-Damage Physical Sorting: Pure mechanical gap sorting causes zero impact or skin damage to onions.
- Efficient Continuous Operation: Processes 1–5 tons/hour, runs 24/7 reliably—ideal for harvest season.
- Extremely Simple Operation and Maintenance: No complex electronics; durable, low-cost, and easy to learn.
- Strong Adaptability Design: Roller spacing can be adjusted manually or electrically in just 5–10 minutes.
Onion Roller Grader Frequently Asked Questions
Q1: What standards can the onion sorting machine grade?
A1: It can grade onions by weight, size, and diameter, with multiple grades customizable according to your needs.
Q2: What is the processing capacity?
A2: The capacity ranges from 1-5 tons per hour, and we can provide customized models for larger production.
Q3: Is the machine made of food-grade material?
A3: Yes, it uses food-grade SUS304 stainless steel, safe for food processing and easy to clean.
Q4: Do you support after-sales service?
A4: Yes, we provide machine installation, commissioning, training and long-term after-sales support.
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