Ultrasonic Sealing for R600a Refrigerator Copper Tubes

With the increasing adoption of R600a refrigerant in modern refrigerators, manufacturers are facing stricter requirements for copper tube sealing quality, safety, and efficiency. Traditional flame brazing methods are no longer ideal due to risks of leakage, oxidation, and environmental concerns.

Ultrasonic sealing technology provides a clean, fast, and highly reliable solution for copper tube closure.

Problems with Traditional Sealing Methods

Conventional brazing or flame sealing has several disadvantages:

• High temperature may damage surrounding components
  
• Risk of refrigerant leakage
  
• Oxidation inside the copper tube
  
• Requires skilled labor
  
• Safety risks when handling flammable gases (R600a)
  

Ultrasonic Sealing Solution

Ultrasonic sealing uses high-frequency vibration to create a solid-state bond, allowing copper tubes to be sealed without flame or filler materials.

Process:

1.Insert copper tube into ultrasonic tooling
2.Apply pressure + ultrasonic vibration
3.Tube is sealed instantly (1–2 seconds)

Key Advantages

✅ No flame, safer for R600a environment
✅ No oxidation, ensures internal cleanliness
✅ High sealing strength and leak-proof performance
✅ Fast cycle time (suitable for automation)
✅ Consistent quality, less operator dependency

Application Example

This technology is widely used in:

• Refrigerator production lines
  
• Automotive refrigeration systems
  
• Compact cooling devices
  

Why Choose Our Solution

At Qijiang Precision, our ultrasonic sealing machines are designed for:

• Thin copper tubes
  
• High-volume production
  
• Stable, repeatable sealing performance
  

Call to Action

If you are looking for a reliable copper tube sealing solution for R600a systems, feel free to contact us for technical details, videos, and sample testing.