PVC conveyor belt welding: Achieve seamless connection and ensure conveying performance

I. Common Welding Methods for PVC Conveyor Belts

1. High-Frequency Welding

• Principle: Generates heat internally via high-frequency current, causing intense molecular motion in PVC to melt the material. Bonds form under applied pressure.
  • Example: Widely used in plastic film packaging to seal two-layer films into airtight packaging pouches within seconds.
• Advantages:
  • Speed: Completes welds in seconds.
  • Durability: High weld strength with excellent appearance and repeatability.
  • Simplicity: No adhesives required.

2. Hot Air Welding

• Principle: Softens PVC at joint areas using hot air guns, followed by pressure bonding and cooling.
• Advantages:
  • Cost-effective: Lower equipment investment.
  • Versatility: Suitable for diverse PVC belt types.

3. Ultrasonic Welding

• Principle: Uses high-frequency vibrations (20–40 kHz) from an ultrasonic generator, transmitted via a welding horn to generate friction heat and melt PVC.
• Advantages:
  • Ultra-fast: Welds in milliseconds.
  • Precision: Ideal for small or complex components.
  • Eco-friendly: No adhesives or emissions.

II. Measures to Ensure PVC Conveyor Belt Performance

1. Weld Strength Assurance

• Method & Parameter Optimization:
  • Select welding methods (e.g., high-frequency, ultrasonic) and calibrate parameters (temperature, pressure, time) based on material thickness and operational demands.
• Quality Testing:
  • Perform tensile testing, impact testing, and simulated real-world condition tests to validate strength and durability.

2. Overall Performance Maintenance

• Routine Inspections:
  • Check weld integrity, surface wear, and tension regularly. Address cracks or looseness promptly.
• Proper Operation:
  • Avoid overloading, abrupt stops, or excessive speed to minimize wear.
  • Maintain optimal tension to prevent slippage or tracking deviation.