Скачать или смотреть Powder coating production line processing of large shock-absorbing springs

In the production line processing of large shock-absorbing springs, the core issues are preventing missed areas, preventing sagging, ensuring adhesion and uniform film thickness, while also considering the spring structure and the production line pace.

Spraying sequence (critical): Follow the principles of inside to outside, difficult to easy, bottom to top: First spray the inside of the spring coil, gaps, and the bends at both ends (most prone to missed areas).

Then spray the outer circle and sides of the spring wire.

Finally, touch up the edges and corners to ensure full coverage.

Leveling and curing: Prevent bubbling, cracking, and uneven drying.

Leveling: After spraying, allow the paint to stand/level for ≥8 minutes to allow the paint to self-level and eliminate pinholes and orange peel.

Curing: Increase the temperature according to the paint requirements, avoiding sudden heating; Recommended:
Primer: 80℃ × 20–30min
Topcoat: 100–120℃ × 25–40min
Cooling: Slowly cool down at the oven exit to prevent thermal stress from causing coating cracking.