The onion roller grading machine utilizes advanced roller gap sorting technology, specifically designed for the automated size grading of spherical root vegetables such as onions, potatoes, and beets. This machine achieves efficient and damage-free sorting through a physical gap principle, making it a core sorting equipment for the onion processing, packaging, and export industries.
Onion Grading Machine Working Principle:
1. Roller Conveying and Rotation: The equipment is equipped with food-grade stainless steel rollers. Onions move forward at a constant speed on the rollers and rotate naturally, ensuring that every angle comes into contact with the sorting gap.
2. Progressive Grading Design: The sorting area adopts a progressive gap widening structure, with the roller spacing gradually increasing from the feeding end to the discharge end, achieving multi-stage synchronous sorting.
3. Precise Dropping and Sorting: When the onion diameter is smaller than the current roller gap, it naturally falls into the corresponding grade collection trough, completing automatic sorting.
4. Grading Outlet Configuration: The standard model is configured with 4-8 grading outlets, and grading standards can be customized according to market demand, directly connecting to the packaging line.
Onion Sorting Machine Core Advantages:
- High-precision grading: Sorting accuracy can reach ±2-3mm, achieving precise grading of 5-8 size grades, meeting domestic and international market standards. Zero-Damage Operation: Pure mechanical sorting principle, no impact or squeezing, with a skin damage rate of less than 0.3%, maximizing the integrity of the onions.
- High-Efficiency Processing: Processing capacity of 2-10 tons/hour, capable of 24-hour continuous operation, perfectly suited to the concentrated processing needs of the onion harvest season.
- Strong Adaptability: Adjustable roller spacing and conveying speed, adaptable to various varieties such as yellow onions, red onions, and white onions, with a diameter range of 40-120mm.
Onion Grading Machine FAQ
Q: Can the machine handle onions with soil attached?
A: Yes, it can. The rotating motion of the rollers effectively shakes off surface soil, but for onions with a lot of soil, it is recommended to add a simple cleaning process at the front end.
Q: How are the grading standards set and adjusted?
A: Multiple grading schemes can be preset via the touchscreen, allowing for quick switching based on variety and market demand. Adjustment time is less than 5 minutes.
Q: Will different onion shapes affect the sorting accuracy?
A: The impact is minimal. Roller grading sorts based on the maximum diameter, achieving the best sorting results for nearly spherical onions. Even flatter varieties can meet commercial grading requirements
Q: What is the price of the equipment?
A: The price is determined by the capacity specifications, configuration level, and degree of automation. Please provide your production requirements, and we will provide the most cost-effective customized solution.
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