The industrial blueberry grading machine utilizes a drum screen for grading, making it a key piece of equipment for handling large-scale blueberry harvests and achieving fast and efficient grading.
Core Working Principle
The blueberry grading machine utilizes a multi-stage, variable-speed rotating drum screen to accurately and continuously sort blueberries from the smallest to the largest:
- Uniform Loading: Blueberries are evenly fed into the feed end of the drum screen via an elevator or conveyor belt. A special deflector design ensures even distribution of the blueberries within the screen drum, preventing accumulation and paving the way for precise grading.
- Drum Rotation and Material Tumbling: Driven by a motor, the entire drum screen rotates slowly at a constant angle and speed. The blueberries are continuously lifted, tumbled, and moved forward along the inclined screen drum.
- Progressive Grading Screening: The drum screen consists of screen segments with varying apertures, increasing in size from the feed end to the discharge end.
- First Stage: The smallest blueberries are screened in the first stage, where they escape through apertures smaller than their own diameter and fall into the first-stage collection trough.
- Subsequent stages: As the drum rotates, unscreened blueberries continue to advance. When they reach the second stage with slightly larger apertures, blueberries of the corresponding size are screened out. This process continues in sequence, achieving multi-stage, precise sorting.
- Final discharge: The largest blueberries, unable to escape any screening stage, are discharged from the end of the drum, completing the grading process.
- Discharge and collection: Each grade has a discharge port located below the collection trough, directing the sorted blueberries of different sizes to designated packaging lines or collection bins, achieving automated flow operations.
Why choose our blueberry grading machine?
- Large capacity: The drum screen design allows the blueberries to be spread over a large area within the sieve, enabling continuous processing and extremely high output per unit time, perfectly meeting the concentrated, large-scale processing needs of the harvest season.
- Extremely low maintenance: Purely mechanically driven and simple in structure. This results in a low failure rate, simple routine maintenance, and a long service life, making it particularly suitable for long-term, stable operation in humid and dusty processing environments.
- Precise Grading: Precise mesh sizes ensure highly consistent blueberry size within each grade. This enhances product image, meets premium market demands, and enables branded sales.
- Low Damage: The optimized drum speed and inclination create a gentle “cascade” tumbling and sliding motion within the drum, effectively minimizing mechanical damage to the delicate skin.
- Adaptability: Customizable mesh size combinations, number of grading levels, and drum length and diameter can be tailored to your specific needs to precisely match your blueberry variety and target market grading standards.
Consult us now for a timeless and reliable blueberry grading solution!
If you’re looking for stable, efficient, and cost-effective large-scale blueberry sorting capabilities during peak production season, this drum screen grader is the perfect choice. Contact us for a detailed proposal and quote!
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