Mangosteen Grading Machine (Roller Bar Design) | Precision Size Sorting

This mangosteen grading machine works by feeding mangosteens onto a series of parallel roller bars that rotate in sync and are slightly spaced apart. As the fruit moves forward, smaller mangosteens drop through narrower gaps while larger ones continue along until they reach larger gaps where they drop off into separate lanes. The roller bars gently rotate each fruit, ensuring it is free‐rolling and uniformly exposed to the grading action. Because the gap width increases along the machine, the fruit is automatically sorted by size (diameter) with consistent grading output. This roller-bar method is especially suitable for round fruits like mangosteens.

Robust roller‐bar framework in food-grade stainless steel: The machine is built with high quality stainless steel structure (e.g., SUS304) and corrosion‐resistant roller bars to ensure hygiene, durability and cleanability in fresh-fruit environments.

Adjustable gap spacing for size customization: The spacing between roller bars can be set to suit specific diameter ranges of mangosteens, enabling classification into multiple size grades as required by different markets.

Gentle rotation and conveyor integration for minimal fruit damage: The roller bars rotate gently, carrying each mangosteen forward in a controlled manner, reducing bruising or skin breakage compared to more aggressive mechanisms.

High throughput capacity with user‐friendly control: With variable speed drive and intuitive operator interface, this machine handles large volumes of mangosteens efficiently, ideal for packing houses preparing export crates.

Consistency in size grading enhances packaging value: By delivering uniform size groups (for example small/medium/large mangosteens), you can match export pack standards, reduce sorting rejects and improve market pricing.

Reduced labour and manual sorting burden: The automatic roller‐bar design takes away much of the tedious manual size‐grading work, freeing staff for inspection, packing and quality control.

Lower fruit damage, higher quality: Because the machine handles fruit gently and sorts by diameter rather than weight or brute force, the overall fruit integrity is better preserved, which is critical for delicate fruits like mangosteen with a tender rind.

Flexible and scalable for export operations: The machine can be adapted (in roller length, number of size grades, speed) to suit packing capacities from small‐scale growers to large‐scale exporters, making it a versatile solution for different business sizes.

Improved export market competitiveness: Uniformly graded mangosteens presented in consistent size classes will meet buyer specifications, boost brand reputation and reduce complaints.

Higher throughput and lower cost per unit: With automated grading, the cost of sorting per ton of mangosteens falls, increasing your processing efficiency and reducing labour cost burden.

Better output quality, fewer rejections: Since size sorting is accurate and gentle, fewer fruits are mis‐classified or damaged, resulting in fewer rejects and less waste.

Scalable processing line integration: The machine fits easily into a full mangosteen post-harvest line (washing → grading → packing), which means smoother workflow, less handovers and simpler plant layout.

In summary, the Mangosteen Grading Machine (Roller Bar Design) | Precision Size Sorting offers a highly efficient, gentle and accurate solution for classifying mangosteens by size for export or premium markets. With its stainless‐steel construction, configurable size gaps, gentle handling and scalable design, this machine helps you elevate your mangosteen processing operation, reduce labour cost, minimise fruit damage and maximise market value.
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