Why Does Ultrasonic Lace Machine Burn Through Curtain Fabric During Welding?

Main Causes:

1. Excessive Energy Parameters

Ultrasonic amplitude (power) or welding time is set too high, generating excessive heat beyond the fabric's tolerance.

2. Fabric Material Unsuitable for High Temperatures

Synthetic fabrics (e.g., polyester, nylon) are weldable but may melt if too thin or low-melting-point.

3. Excessive Pressure

The horn (die) pressure is too high, causing overheating due to excessive friction.

4. Poor Horn (Die) Design

Sharp or small contact-area patterns concentrate pressure, piercing the fabric.

5. Insufficient Cooling

Continuous operation heats the horn, accumulating excess heat without cooling.

6. Mechanical Faults

Frequency misalignment, horn wear, or ageing transducers cause unstable energy output.