Bulk Automatic Egg Grading And Washing Machine
Bulk Automatic Egg Grading and Washing Machine
This equipment combines high‑speed washing with precision grading to handle large volumes of table eggs in a single continuous line. By integrating spray‑cleaning, brush agitation, and sensor‑based size/weight sorting, it reduces manual handling, minimizes microbial load, and delivers uniformly sorted eggs ready for packaging or further processing.
Technical Overview
Eggs enter via a vibratory feeder that orients them point‑down onto a stainless‑steel conveyor. The first stage uses a series of rotating brush nozzles with adjustable spray pressure (0.5–1.5 bar) and temperature (30–55 °C) to remove dirt, feces, and bacteria. After washing, eggs pass through an air‑knife drying zone before reaching the grading section, where load‑cell sensors measure weight and laser‑based scanners determine diameter and shape. Defective items (cracks, misshapes, stains) are diverted by pneumatic ejectors into a reject chute.
The line speed is continuously adjustable from 0.5 to 3.0 m/min, translating to a throughput range of 12,000 to 72,000 eggs per hour depending on egg size and selected washing intensity. All contact surfaces are fabricated from 304/316L stainless steel with food‑grade PTFE belts, ensuring compliance with FDA and EU food‑contact regulations.
Key Performance Parameters
| Parameter | Typical Value | Unit | Notes |
|---|---|---|---|
| Egg size range | 40–65 | mm (minor axis) | Adjustable via grading lanes |
| Washing temperature | 30–55 | °C | PLC‑controlled, PID feedback |
| Water consumption | 2.5–4.0 | L/min | Recirculation with filtration optional |
| Power rating | 3.5–5.5 | kW | Three‑phase 380 V, 50/60 Hz |
| Grading accuracy | ±2 | mm (size), ±1 g (weight) | 95 % correct sort rate at nominal speed |
| Noise level | ≤78 | dB(A) | Measured at 1 m distance |
Design and Construction
The frame is constructed from welded 304 stainless steel square tubing, providing torsional rigidity while allowing easy cleaning. All wear‑parts such as brushes, nozzles, and conveyor belts are modular and can be replaced without disassembling the main drive. Electrical components are housed in IP65‑rated enclosures, and the control system uses a PLC with HMI touchscreen for recipe management, speed adjustment, and fault diagnostics.
Lubrication points are sealed and use food‑grade grease, eliminating contamination risk. The machine’s footprint is optimized for inline integration: overall dimensions (L × W × H) are 2 800 mm × 1 200 mm × 1 800 mm, with a clear access height of 1 200 mm for maintenance. Optional stainless‑steel legs with leveling pads facilitate installation on uneven floors.
Applications
Poultry processing plants benefit from this equipment because it consolidates two critical post‑lay operations—sanitization and sorting—into a single footprint, reducing transfer points that can compromise egg integrity. Large‑scale egg farms with daily outputs exceeding 100 000 eggs use the line to meet retailer specifications for cleanliness and uniform size, thereby lowering downgrade rates and improving market price.
In addition, egg‑product manufacturers (e.g., liquid egg, powdered egg) rely on the consistent microbial load reduction achieved by the wash stage to satisfy HACCP requirements. The grading accuracy ensures that downstream breakers or separators receive uniformly sized feedstock, enhancing yield and reducing equipment wear.
Customization Options
- Adjustable number of grading lanes (2 to 6) to match desired size categories.
- Variable wash tank configuration: single‑pass, double‑pass, or recirculating with UV disinfection.
- Integration kits for upstream egg collection conveyors and downstream packaging robots.
- Optional data logging module for traceability (wash parameters, grade distribution, reject counts).
- Alternative belt materials (food‑grade PU, modular plastic) for specific product handling needs.
Quality Assurance and Testing
Prior to shipment each unit undergoes a factory acceptance test (FAT) that includes: wash efficacy verification using ATP bioluminescence, grading repeatability with calibrated egg simulators, and emergency stop validation. Test reports are provided with the machine, documenting key parameters such as bacterial reduction (minimum 3‑log CFU), size distribution variance (< 1.5 %), and power consumption under load.
Spare parts are stocked for critical wear items (brushes, nozzles, belts) with a standard lead time of two weeks. A one‑year limited warranty covers parts and labor for defects in material or workmanship, provided the equipment is operated within the specified environmental and loading conditions.
FAQ
- Can the machine be adapted for different egg sizes?
- Yes, the grading lanes are interchangeable and the sensor thresholds are adjustable via the HMI to accommodate peewee, small, medium, large, and extra‑large categories.
- What information is required for a quotation?
- Required details include desired hourly throughput, egg size range, washing temperature preference, available facility dimensions, and any needed upstream/downstream interfacing equipment.
- Are stainless‑steel grades optional?
- Standard construction uses 304 SS; 316 SS is available for environments with higher chloride exposure, such as near‑sea processing plants.
- How is the machine protected during export shipment?
- Units are packed in heat‑treated wooden crates with corrosion‑inhibiting vapor barriers, shock‑absorbing foam, and secured with steel straps. A detailed packing list and handling instructions accompany each shipment.
- What is the typical production lead time?
- Lead time ranges from 8 to 12 weeks after receipt of technical confirmation and deposit, depending on configuration complexity.
Contact for Inquiry
To discuss how this bulk automatic egg grading and washing machine can be tailored to your processing line, please complete the inquiry form or contact our technical sales team directly. We will provide a detailed layout drawing, performance simulation, and a formal quotation within two business days.
