Fruit handling · Stage 03
Singulate and grade whole apples by diameter so the crusher, press and inspection step see a more consistent feed.
THE PROCESS DUTY
A roller sorter uses gaps or roller spacing to separate apples by diameter while moving them along the line. It can improve inspection by singulating fruit and can direct different size fractions to different destinations. It does not measure internal quality, sugar content or hidden defects; those require separate inspection or analytical methods.
IN THE LINE
The equipment is only useful when its feed and discharge are defined. These adjacent duties are the first interfaces to review.
WORKING PRINCIPLE
The explanation starts with the material and the process, not a catalogue description.
Roller gaps or channels separate fruit according to diameter and, to some extent, shape. The result is a size fraction, not a quality grade. Define what each fraction is for before choosing the number of lanes or discharge points.
When fruit moves one layer deep and rotates on rollers, operators can see more of the surface. This supports manual removal of visible defects. It does not replace a defined acceptance standard or a record of what was removed.
A more uniform fruit size can make crusher feeding and press loading more predictable. It can also reduce the chance that very small fruit bypasses inspection or very large fruit stalls a transfer. The benefit depends on the actual downstream equipment.
Every grade needs a destination. Decide whether smaller or larger fruit goes to the same crusher, a different product, a reject bin or a bypass. The layout should keep the streams separate and accessible.
WHERE IT FITS
WHAT TO WATCH
CONFIGURATION OPTIONS
These are the choices that change the equipment scope. The approved datasheet fixes the final selection.
Fixed or adjustable spacing selected around the size thresholds and fruit shape.
Single or multiple lanes to match the inspection team and downstream feed width.
Side transfers or end discharges for each size fraction, with clear destinations.
Roller rotation to present the fruit surface without excessive tumbling.
Lighting and access positioned for visible defect detection and safe reject removal.
SELECTION FACTORS
Bring these points to the equipment discussion. They are more useful than a single throughput number.
The spread between smallest and largest fruit determines the number of grading steps.
Inspection, crusher feed, product separation or a combination of these.
The number of lanes should match the achievable inspection rate, not only the conveyor speed.
Each fraction needs a safe, accessible route to its next destination.
SPECIFICATIONS
No catalogue model or performance figure is shown until the configuration is approved. The final datasheet fixes these items.
| Specification area | What is defined in the approved datasheet |
|---|---|
| Capacity basis | Fruit mass per hour and the number of grading lanes |
| Grading basis | Diameter or size range agreed for the fruit supply |
| Roller contact | Material and spacing selected for fruit and cleaning needs |
| Discharges | Number and destination of size fractions defined in the layout |
| Access | Inspection, reject removal and roller cleaning access |
| Documentation | General arrangement, grading basis and approved datasheet |
Provide your product, capacity basis and available utilities to move from this selection framework to a project-specific datasheet.
TECHNICAL FAQ
If your question depends on the fruit, product or site, include the conditions in the enquiry rather than relying on a general answer.
Send a project enquiryNo. It grades primarily by size and can improve visual inspection by singulating fruit. Internal quality, maturity, sugar content and hidden defects require other methods. Do not present size grading as a quality guarantee.
Usually after washing and before crushing or a final inspection step. The exact position depends on whether the sorter is used for inspection, crusher feed control or product separation. Keep the discharge streams accessible.
Varieties differ in shape and rolling behaviour. The roller spacing and lane arrangement should be checked against the actual varieties and size range. A trial with representative fruit is more useful than a single average diameter.
No. It adds value when size variation affects inspection, crushing or product separation. A uniform fruit supply with a clear feed may not need it. Decide from the process objective, not from a catalogue list.
YOUR PRODUCT. YOUR PROCESS.
Tell us the product, the quantity basis and the packaging. We will work back through the process to the equipment scope.