1. Introduction to Egg Size Grading Machine
An Egg Size Grading Machine is a specialized automated device designed to sort eggs based on their size and weight. This equipment plays a crucial role in modern poultry production, egg processing, and packing industries. By accurately classifying eggs into different size categories, it helps producers meet market demands, adhere to regulatory standards, and optimize packaging efficiency.
Traditionally, egg grading was performed manually, which is time-consuming and prone to inconsistencies. With advancements in technology, egg size grading machines have become essential in boosting productivity, ensuring accuracy, and reducing labor costs. These machines employ precision sensors and conveyors to handle eggs gently, minimizing breakage while maintaining high sorting speeds.
This guide provides an in-depth overview of egg size grading machines, including technical specifications, features, advantages, application scenarios, operation instructions, maintenance tips, and frequently asked questions.
2. Technical Specifications of Egg Size Grading Machine
Sorting Capacity | 5,000 – 60,000 eggs per hour |
Egg Weight Range | 35g – 90g |
Number of Size Categories | 3 to 7 categories (e.g., Small, Medium, Large, Extra Large) |
Conveyor Speed | Adjustable; typically 5-15 meters per minute |
Power Supply | 220V or 380V, 50/60Hz |
Machine Dimensions | Approx. 1500mm × 1000mm × 1200mm |
Machine Weight | 300 – 700 kg |
Construction Material | Stainless steel and food-grade aluminum |
Control System | PLC with touchscreen interface |
Sorting Accuracy | Greater than 98% |
Noise Level | Less than 75 dB |
Operating Temperature Range | 0°C to 40°C |
3. Key Features of Egg Size Grading Machine
3.1 Precision Size and Weight Sorting
Equipped with high-precision load cells and size detection sensors, the machine sorts eggs accurately according to predefined size categories.
3.2 High-Speed Sorting Capacity
The grading machine can handle up to 60,000 eggs per hour, significantly enhancing throughput and efficiency.
3.3 Gentle Egg Handling System
Designed with soft rollers and cushioned conveyors, the machine ensures gentle handling to minimize egg breakage during sorting.
3.4 User-Friendly Control Interface
The PLC-based touchscreen control panel allows operators to easily set parameters, monitor real-time operation, and adjust sorting categories.
3.5 Compact and Modular Design
The compact footprint and modular construction enable easy installation, maintenance, and scalability for various production needs.
3.6 Food Safety and Hygiene Compliance
Constructed using stainless steel and food-grade materials, the machine complies with hygiene standards and supports easy cleaning.
3.7 Optional Integration with Packing Lines
The machine can be seamlessly integrated with automated packing systems to streamline the entire egg processing workflow.
4. Advantages of Using an Egg Size Grading Machine
4.1 Enhanced Operational Efficiency
Automation significantly reduces manual labor and sorting time, allowing producers to process large volumes quickly.
4.2 Consistent and Accurate Sorting
Accurate classification ensures eggs meet market and regulatory size standards, improving customer satisfaction.
4.3 Reduced Egg Breakage and Waste
Gentle handling mechanisms minimize damage, reducing product loss and increasing profitability.
4.4 Data Tracking and Management
Modern machines provide data analytics on grading volumes and size distribution, aiding farm management and decision-making.
4.5 Scalability and Flexibility
Modular design allows easy expansion and customization to fit various production scales and operational requirements.
5. Application Scenarios of Egg Size Grading Machine
5.1 Poultry Farms
Medium to large-scale farms use grading machines to automate egg sorting and ensure product standardization.
5.2 Egg Packing Plants
Packing plants rely on these machines to efficiently sort eggs before packaging, maintaining quality control.
5.3 Wholesale and Distribution Centers
Sorting machines help distributors classify eggs for uniform packaging and easy logistics handling.
5.4 Food Processing Facilities
Egg processing companies grade eggs to ensure only suitable products enter further processing stages.
6. How to Operate an Egg Size Grading Machine
6.1 Installation and Setup
Ensure a stable, level surface with appropriate power supply.
Install the machine as per manufacturer guidelines.
Calibrate load cells and size sensors.
Configure sorting parameters on the control panel.
6.2 Operating Procedure
Power on the machine and initialize the control system.
Load eggs onto the feeding conveyor carefully.
Monitor grading and sorting via the touchscreen.
Collect sorted eggs at respective outlets.
Address any alerts or errors promptly.
6.3 Shutdown and Cleaning
Follow proper shutdown protocols.
Remove all residual eggs and debris.
Clean all surfaces with approved sanitizers.
Perform routine maintenance checks.
7. Maintenance and Troubleshooting
7.1 Daily Maintenance
Clean rollers, belts, and sensors.
Remove debris and broken egg shells.
Check for unusual noises or malfunctions.
7.2 Weekly Maintenance
Lubricate moving parts as per guidelines.
Inspect belts and rollers for wear.
Calibrate sensors if necessary.
7.3 Troubleshooting Common Issues
Machine does not start | Power supply issues or emergency stop | Check power connections and reset emergency stop |
Inaccurate sorting results | Sensor misalignment or dirt | Clean sensors, recalibrate system |
Conveyor jams | Foreign objects or egg overload | Clear jam, reduce feed rate |
Excessive egg breakage | High conveyor speed or mechanical fault | Lower speed, inspect cushioning |
Control panel unresponsive | Software glitch or hardware fault | Restart system, update software |
8. Frequently Asked Questions (FAQ)
Q1: What is the typical sorting capacity of an egg size grading machine?
A: Capacities range from 5,000 to 60,000 eggs per hour depending on the model.
Q2: Can the machine sort eggs based on weight and size simultaneously?
A: Yes, most machines use integrated sensors for precise sorting by both weight and size.
Q3: Is the machine suitable for different egg types?
A: Generally yes, including chicken, duck, and quail eggs, but confirm with the manufacturer for specific types.
Q4: How often should the machine be calibrated?
A: Calibration is recommended before initial use and regularly every 1-3 months.
Q5: How gentle is the handling process?
A: The machine is designed with cushioned rollers and soft conveyors to minimize egg damage.
Q6: Can the machine be integrated with automated packing lines?
A: Yes, it supports seamless integration to optimize workflow.
Q7: What are the cleaning requirements?
A: Regular cleaning with food-safe sanitizers is necessary to maintain hygiene and performance.
Q8: How long is the typical lifespan of the machine?
A: With proper maintenance, the machine can last 8-15 years.
9. Conclusion
The Egg Size Grading Machine is an indispensable tool for modern poultry farms, packing plants, and processing industries. It automates the classification of eggs by size and weight, improving productivity, accuracy, and product consistency. By reducing manual labor and minimizing egg breakage, it enhances overall operational efficiency and profitability.
Investing in a high-quality egg size grading machine is a strategic move to meet evolving market demands and maintain competitive advantage in the egg production industry.

Shandong Huimin Qinle Livestock Machinery Co., Ltd. (formerly Shandong Huimin Qinle Livestock Machinery Factory) is a professional poultry equipment manufacturer with over 20 years of experience. We offer a comprehensive service package, from design (land and chicken coops), production (equipment and prefabricated steel coops), installation, commissioning, customer training, and after-sales service.
Located in Huimin County, Binzhou City, Shandong Province, China, the company has extensive experience in mechanical processing and manufacturing, as well as livestock machinery production and operation. With fixed assets of RMB 15 million, the company employs 160 people, including 30 R&D staff, and occupies a 40,000-square-meter factory. Equipped with over 110 pieces of advanced precision production equipment, including CNC machining centers and laser cutting machines, the company boasts a production capacity of RMB 50 million.




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