What types of equipment are used for welding PVC film materials

I. Welding Characteristics of PVC Membrane Material
PVC (Polyvinyl Chloride) membrane is a thermoplastic material, and its welding requires adherence to the following critical parameters:

• Melting Point Range: 185–280°C (varies depending on formulation and thickness).
• Thermal Stability: Requires uniform heating to avoid localized overheating, which may cause material degradation.
• Welding Strength: Post-welding strength must approach that of the raw material to ensure sealing integrity and durability.

II. Applicable Equipment Analysis
1. High-Frequency Welding Machine (High-Frequency Induction Welder)
Working Principle:
Utilizes a high-frequency electromagnetic field (above 20,000 Hz) to generate eddy currents within the PVC, achieving fusion through friction-induced heat. Welding methods include fusion welding, embedded welding, and riveting, catering to complex process requirements.

Advantages:

• PVC-Specific Design: High welding strength (close to raw material strength), especially suitable for soft/hard materials containing ≥30% PVC.
• Efficiency and Safety:
  • Equipped with spark suppressors and overload protection to minimize operational risks.
  • Short welding time (e.g., ≤5 seconds for copper components), boosting production efficiency.
• Versatility:
  • Typical applications: PVC tents, raincoats, inflatable products, membrane structures, biogas/pool welding.
  • Equipment types: Dual-head pneumatic/hydraulic pedal-type high-frequency machines, integrating machine beds and oscillators to reduce footprint.

Applicable Scenarios:
Industrial-scale production, particularly ideal for films, soft PVC, and composite materials.