INTRODUCTION 

The 25kg heavy bag seed packaging machine is an industrial-grade FFS (Form-Fill-Seal) system specifically engineered for agricultural seed processing.  With ±0.2% weighing accuracy and 400-600 bags/hour capacity, this ATEX-compliant equipment features abrasion-resistant stainless steel contact parts and optional nitrogen flushing for sensitive hybrid seeds.  The servo-driven forming collar creates seamless tubular bags from multi-layer co-extruded films (150-280μm thickness), while its modular design allows quick conversion between seed varieties.

TECHNICAL SPECIFICATIONS

1.1 Core Parameters

Weighing System: Loss-in-weight feeder with auto-density compensation

Film Type: 3-layer co-extruded PE/PP with anti-static treatment

Sealing: Dual hot-bar cross seal + cool seal reinforcement

Power: 380V±10%, 15KW

Dimensions: 5200×1800×3900mm (L×W×H)

‌Packaging speed: Up to 800 bags/hour‌

1.2 Performance Metrics

Speed: 500 bags/hour (25kg standard)

Weight Accuracy: ±50g (0.2% of target)

Gas Flushing: Nitrogen/O2<1.0% (optional)

Dust Emission:<5mg/m³ (with integrated dust collector)

APPLICATION SCENARIOS

2.1 Crop Seeds

Hybrid corn seeds requiring moisture protection

Rice seeds with husk abrasion considerations

Oilseed rape with anti-static packaging needs

2.2 Specialty Applications

Coated seeds with temperature-sensitive treatments

Organic seeds requiring breathable film options

GM seeds with traceability coding requirements

OPERATIONAL MANUAL

3.1 Pre-Operation Setup

Film loading:

Mount 1000mm wide film roll on servo unwind shaft

Thread through tension rollers and forming collar

Parameter configuration:

Input bag dimensions (standard 700×1100mm)

Set target weight with auto-compensation

Adjust sealing temperature (160-180°C for PE films)

3.2 Production Cycle

Phase 1: Film advance → vertical tube formation

Phase 2: Bottom seal creation → laser date coding

Phase 3: Gravimetric filling via split-gate discharge

Phase 4: Top sealing → bag ejection to conveyor

3.3 Cleaning Procedure

Daily:

• Vacuum residual seeds from weighing hopper

• Wipe film path with alcohol wipes

Weekly:

• Lubricate chain drives with food-grade grease

• Inspect sealing jaw alignment

MAINTENANCE SCHEDULE

4.1 Preventive Maintenance

Monthly:

• Replace worn film guide rollers

• Calibrate load cells with test weights

• Check pneumatic filter elements

Quarterly:

• Servo motor belt tension adjustment

• Electrical cabinet dust removal

4.2 Wear Parts Replacement

Sealing jaws: 200,000 cycles

Film tension rollers: 150,000m film

Load cells: 5 years or 10M weighments

TROUBLESHOOTING GUIDE

5.1 Common Issues Issue:

Inconsistent bag lengths Solution:

Adjust film encoder resolution and tensioner pressure

Issue: Weak seal integrity

Solution: Increase temperature by 5°C increments or replace PTFE tape

Issue: Weighing fluctuations

Solution: Recalibrate load cells and check air suspension

5.2 Error Codes

E-05: Film jam → Clear obstruction and reset dancer arm

E-17: Overweight → Verify gate closure timing

E-29: Temperature fault → Check thermocouple connections

FREQUENTLY ASKED QUESTIONS

Q1: What film thickness prevents seed damage?

A: Minimum 180μm with nylon reinforcement layer for sharp-edged seeds

Q2: How does the moisture barrier work?

A: Aluminum oxide-coated films achieve<0.5g/m²/24h WVTR

Q3: Can it handle pelleted seeds?

A: Yes, with optional vibratory density compensator

Q4: What's the power consumption?

A: 7.5kW average with energy recovery during deceleration

Q5: How are metal contaminants prevented?

A: Inline magnetic separator at infeed chute