Seal Process of Three-Piece Aerosol Cans

Seal Process of Three-Piece Aerosol Cans

To ensure the sealing of three-piece aerosol cans, we strictly control the key parts and critical processes, with 100% leak detection to avoid leakage. The key points are as follows:

Core Sealing Control Measures

1. Longitudinal Weld: Stable welding parameters to ensure continuous weld; post-weld internal touch-up coating and full curing, no exposed iron or pinholes.

2. Double Seam: Accurate seaming tool size, qualified seam structure, even sealant application, no false or loose seaming.

3. Raw Materials: High-quality tinplate, can bottom/top, sealant and internal coating, free of defects like rust or cracks.

4. 100% Leak Detection: Adopt water bath leak detection, air pressure decay test or high-pressure leak test to eliminate micro-leakage.

5. In-Process Control: Stable necking/flanging size, complete coating curing, regular seam inspection and performance verification.

Key Leakage-Prone Points

Insufficient weld touch-up coating, insufficient seaming pressure, inadequate sealant, internal coating pinholes and flanging cracks.

Summary

Sealing performance = high-quality weld + complete internal coating + qualified double seam + 100% leak detection, all indispensable for zero leakage.