How to reduce apple damage during sorting

Mechanical damage to apples during sorting is one of the main causes of quality losses. Even small bruises can lead to reduced fruit quality, shorter storage life, and customer complaints.

What causes apple damage

The most common causes of apple damage during sorting are:

• excessive drop heights between conveyors,
• line speed that is too high,
• hard transport elements,
• lack of buffers between machines,
• sorting apples at too high a temperature,
• incorrect bin emptying.

Although apples seem hard, they are very sensitive to impacts. Damage is often not visible immediately but appears after a few days as a dark bruise under the skin.

How to reduce damage – practical solutions

1. Reduce drop heights

Each fruit drop should be as small as possible. Modern lines use:

• water unloaders,
• brushes,
• buffer conveyors,
• soft linings.

2. Proper line speed

A line that is too fast causes apples to collide with each other and with machine components.

3. Sorting apples at the right temperature

Apples that are too cold are more brittle and more susceptible to damage.

4. Proper sorting line design

Modern sorting machines are designed so that apples move as smoothly as possible, without sudden drops and impacts. Proper line design has a huge impact on reducing fruit damage:
https://greensort.com/en/products/fruit-sorters/

Summary

Apple damage during sorting is most often caused by transport mechanics rather than the sorting process itself. A well-designed sorting line can significantly reduce losses and improve the final product quality.