Shrink tunnel
Shrink tunnels are advanced thermal systems designed to apply controlled heat to shrink film, creating a secure, tamper-evident seal around products. Ideal for industries requiring high-speed, precision packaging (e.g., food, pharma, cosmetics), these systems ensure product integrity and brand appeal.
Multi-Zone Precision Heating: ±1.5°C uniformity across 3–12 zones (PID-controlled).
Advanced Thermal Recovery: ≤3-second heat recovery after film loading. Zero cold zones ensure uniform shrinkage across irregular shapes.
Dynamic Conveyor Adjustments: 0–15 m/min speed with ±0.2% accuracy. Anti-static belts reduce film misalignment (tested at RH <30%).
Ultra-Low Noise Operation: ≤65 dB(A) at full load. Vibration damping: <2µm/s²
Technical specification
| Model | Voltage | Power | Speed(m/min) | Shrinking Oven(LxWxH) mm | Weight(kg) | Dimension(mm) |
|---|---|---|---|---|---|---|
| BS-4020 | 220V/380V | 6.8KW | 0-10 | 800x400x200 | 200 | 1600x600x1250 |
| BS-4522 | 220V/380V | 7KW | 0-10 | 1200/1500x450x220 | 210 | 1600x750x1350 |
| BS-4525 | 220V/380V | 8KW | 0-10 | 1500/1800x450x250 | 220 | 1600x750x1350 |
| BS-5530 | 380V | 15KW | 0-10 | 1500/1800x550x300 | 230 | 1900x800x1400 |
| BS-6530 | 380V | 18KW | 0-10 | 1500/1800x650x300 | 250 | 1900x1000x1400 |
| BS-7530 | 380V | 18KW | 0-10 | 1500/1800x750x300 | 280 | 2200x1050x1400 |
| BS-8530 | 380V | 20KW | 0-10 | 1500/1800x850x300 | 300 | 2300x1100x1400 |
| BS-X5040 | 380V | 25KW | 0-15 | 1500x500x400 | 200 | 2500x750x1520 |
| BS-X6040 | 380V | 30KW | 0-15 | 1500x600x400 | 220 | 2800x850x1520 |
Semi-auto Sealer and Heating tunnel
The ultimate packaging powerhouse: our semi-auto sealer with heating tunnel. This ingenious machine seamlessly combines sealing and heating technologies, revolutionizing your packaging process and delivering flawless results.
Precision Control: Digital PID temperature controller ensures ±2°C accuracy.
Uniform Heat Distribution: Forced hot air circulation system ensures ±3°C uniformity across the tunnel.
Industrial Durability: Reinforced steel frame with powder-coated finish resists corrosion and mechanical stress.
| Model | BS-4020S(Heating Tunnel) | FQL-450S(Semi-Auto Sealer) |
|---|---|---|
| Tunnel size (LxWxH) | 800*400*200mm | N.A. |
| Wrapping size (LxWxH) | N.A. | 500*300*125mm |
| Speed | 0-15 m/min | 0-18 bag/min |
| Film | POF/PVC | POF/PVC |
| Temperature | 0-300 degree | 0-300 degree |
| Voltage | 220V/380V | 220V |
| Power | 7.5KW | 4.5KW |
| Footprint | 1150*750*1050mm | 1060*720*1240mm |
| Weight | 80kg | 80kg |
Heating tunnel vIDEO
Maintenance guide
Daily
Inspect conveyor belt alignment (max. ±1.5 mm deviation).
Clean infrared (IR) heating elements with anhydrous ethanol to remove residue.
Log temperature uniformity (±2°C tolerance across zones).
Monthly
Lubricate chain drives and bearings using Molykote PG-65 high-temperature grease.
Calibrate PID controllers with a traceable thermocouple (accuracy: ±0.5°C).
Annually
Replace heating panels (service life: 8,000–10,000 hrs).
Conduct full-system safety audit per IEC 60204-1:2016.
Safety & Compliance
Lockout/Tagout (LOTO): Mandatory during maintenance (OSHA 29 CFR 1910.147).
Thermal Guards: Ensure radiant heat shielding is intact (surface temp ≤45°C per ISO 13732).
Emergency Stop: Test response time (<0.5 sec) monthly.
Common Operational Faults & Solutions
| Symptom | Possible Cause | Immediate Action | Tools Required |
|---|---|---|---|
| Uneven Heating | – Faulty IR heating element – Misaligned reflectors – Sensor calibration drift | 1. Check element resistance (target: 20–25Ω) 2. Realign reflectors to ±2° angle 3. Recalibrate Type K thermocouples | Multimeter, Infrared thermometer |
| Belt Slippage/Misalignment | – Worn drive chain – Loose tensioner – Debris on rollers | 1. Adjust belt tension (per torque specs) 2. Clean rollers with non-abrasive solvent 3. Replace chain if elongation >3% | Torque wrench, Caliper |
| Overheating Alarm | – Clogged HEPA filters – Failed cooling fan – PID controller error | 1. Replace filters (ΔP >50 Pa) 2. Test fan voltage (24V DC ±5%) 3. Reset PID parameters | Manometer, Oscilloscope |
| Intermittent Power Loss | – Loose terminal connections – Insulation breakdown (R <100 MΩ) – Phase imbalance | 1. Tighten terminals (10–12 Nm torque) 2. Perform Megger test at 500V DC 3. Balance phases (<5% variance) | Megohmmeter, Clamp meter |
| Excessive Vibration | – Unbalanced motor – Damaged bearings – Misaligned pulleys | 1. Balance motor using ISO 1940 G6.3 standard 2. Replace bearings (vibration >4.5 mm/s RMS) 3. Align pulleys (laser alignment tool) | Vibration analyzer, Laser aligner |
Notes: For persistent faults, consult the factory-certified service manual.