2026-09-18

External Roller Type Fruit Classifier Improves Automatic Size Grading for Citrus Processing

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      External Roller Type Fruit Classifier Improves Automatic Size Grading for Citrus Processing

      The global citrus industry is experiencing continuous growth, with fresh fruit exports and deep-processing markets putting forward higher standards for fruit appearance, size uniformity and product stability. For citrus processing plants, fruit size classification is an indispensable step before packaging and further processing. Manual sorting is slow, labor-intensive and prone to inconsistent grading standards, which greatly limits the factory’s daily output and product competitiveness. Many fruit processors are actively upgrading their production lines with automated sorting equipment to solve these pain points.

      Designed for round fruit size sorting, the External Roller Type Fruit Classifier has become a popular choice for citrus, kumquat and small round fruit processing factories. This machine adopts multi-group perforated rotary drum structure. With the rotation of the external roller drum, fruits move forward steadily along the drum surface. The holes on each drum are designed with gradually increasing diameters. Smaller fruits will fall through the corresponding holes first and drop into the separate discharge hoppers below, while larger fruits continue moving to the next stage of sorting. In this way, fruits can be divided into multiple size grades in one continuous operation.

      The whole body of the External Roller Type Fruit Classifier is fabricated with food-grade 304 stainless steel, fully complying with international food safety and sanitation requirements. The smooth surface of the rotary drum prevents scratches and bruises on fruit skin during the sorting process, effectively reducing product loss rate. Compared with traditional sorting machines, this external roller drum design provides gentler handling for fruits. It avoids heavy impact and keeps the integrity of fruit peel, which is especially important for fresh citrus for export sales.

      Operational adjustment of the External Roller Type Fruit Classifier is flexible. Customers can replace roller drums with different hole sizes according to their actual product requirements, so the machine can adapt to various round fruits such as oranges, mandarins, kumquats and small tomatoes. The machine features independent discharge outlets for each grade, so different sizes of fruits can be collected separately without mixing. The transmission system runs stably with low noise and low failure rate. The open-type structure makes daily cleaning and residue removal much easier for operators, greatly lowering maintenance time and cost.

      This fruit classifier can be seamlessly integrated with upstream fruit washing, air drying and conveying equipment, as well as downstream packaging machines, to build a fully automatic fruit pretreatment production line. For small and medium fruit processing factories, it can replace dozens of manual sorting workers, cutting labor costs significantly. For large export-oriented fruit plants, it ensures stable and unified grading standards, helping enterprises meet strict quality inspection requirements from overseas buyers and gain more market orders.

      Nowadays, the External Roller Type Fruit Classifier has been widely deployed in fruit processing bases across many countries. Many plant owners have reported that after introducing this sorting machine, their production efficiency has increased greatly, and the reject rate caused by uneven fruit sizes has decreased obviously. As the demand for standardized fresh fruit continues to rise worldwide, this rotary drum sorting equipment will continue to play an important role in modern fruit pre-processing lines.

      http://www.shishenfoodtech.com
      Ningbo Shishen Intelligent Equipment Co., Ltd.

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