Automatic Corn Seed Cleaning and Grading Line in China

Automatic Corn Seed Cleaning and Grading Line in China

Shijiazhuang Xinlu Technology Co., Ltd. presents the Automatic Corn Seed Cleaning and Grading Line in China, a fully automated solution designed for high-precision removal of foreign materials and consistent fractionation of seed sizes. This integrated line streamlines the transition from raw corn harvest to uniform seed lots ready for treatment or planting.

Process Overview

1. Bulk Feeding
   Raw corn seed is delivered via an inclined conveyor into a buffer hopper equipped with level sensors to maintain a steady feed.

2. Pre‑Cleaning Module
   Vibrating screens remove oversized debris such as cobs, stones, and stalk fragments. An aspirator draws off dust, chaff, and light admixtures, protecting downstream equipment.

3. Magnetic and De‑Stoning Section
   A magnetic separator captures metal particles, while a de‑stoning unit uses adjustable airflow and oscillation to separate heavier stones and earth clods.

4. Primary Sieving Unit
   A multi‑deck sieving machine with interchangeable meshes classifies kernels into three size fractions: large, medium, and fine. Each deck’s vibration amplitude and frequency can be independently controlled to optimize grading accuracy.

5. Secondary Sieving and Grading
   Following the primary sieves, graded kernels undergo a second screening step that refines each size fraction further, ensuring tight tolerances for seed lot uniformity.

6. Dust Collection System
   Enclosed ductwork and cyclonic collectors capture airborne particulates from each aspirator inlet, maintaining a clean processing environment.

7. Automated Distribution
   At the line’s conclusion, graded seed streams are channeled via diverter gates into designated holding bins or directly into packaging stations.

Key Features

• PLC‑Controlled Operation: Centralized touchscreen interface stores up to twenty recipes for different corn varieties, allowing one‑touch changeovers.

• Inline Sensors: Optical density sensors monitor kernel quality in real time, triggering automatic adjustments to airflow and vibration settings.

• Energy‑Efficient Drives: Variable-frequency motors on fans and conveyors optimize power consumption based on load conditions.

• Hygienic Design: Food-grade steel contact surfaces and sloped interiors prevent material hang-up and facilitate cleaning.

• Modular Construction: Each module can be added or bypassed to tailor the line for specific capacity requirements, from 5 t/h up to 50 t/h.

Operational Benefits
By automating both cleaning and grading, this line reduces manual labor and ensures reproducible seed quality across batches. Processors benefit from minimized kernel breakage and consistent size distribution, which supports seed certification programs and planting uniformity in the field.

Maintenance and Support
Routine tasks include screen mesh inspection, aspirator filter cleaning, and lubrication of vibrating bearings. Shijiazhuang Xinlu Technology Co., Ltd. offers comprehensive maintenance manuals, preventive maintenance schedules, and on-site technician training to maintain peak performance.