Just sprayed paint feels as rough as sandpaper? "Orange peel" and "pinholing" not only ruin the product's appearance, but may also become weak points for corrosion. As a professional manufacturer, we show you how to manage airborne dust, paint filtration, and equipment cleaning at the source to create a "mirror-finish" industrial coating environment.
In high-end machinery and automotive parts coating, what we pursue is a silky, smooth touch. However, many factories find after application that the paint film surface has tiny bumps, commonly known as "particles" or "fisheyes." This is usually not due to the paint itself going bad, but rather a problem with the "health" of the application environment.
As an industrial paint manufacturer, we break down the sources of these defects and management strategies for you:
1. "Particles": Products of exogenous contamination
- Culprit: Flying dust, debris from the grinding workshop, and even fibers from the workers' clothing.
- Countermeasures: Environmental isolation: The painting booth must be physically isolated from the sanding booth and shot blasting booth.
- Wet operation: Sprinkle water on the ground before construction to suppress dust and prevent dust from being stirred up by personnel movement.
- Paint filtration: After mixing the paint, it must be filtered using a 120-200 mesh filter screen to remove impurities that fell in during the mixing process.
2. "Getting heat rash": The trap of aerosols and water vapor
- Culprit: The compressed air contains oil or moisture; or the underlying paint film is not thoroughly dry, and the solvent breaks through forcefully after skinning on the surface.
- Countermeasures: Air source management: Regularly inspect the oil-water separator to ensure the spray gun emits pure, dry air.
- Control film thickness: Avoid applying excessively thick coats in a single pass to prevent solvents from being "trapped" inside and forming bubble protrusions.
3. Self-inspection Checklist for the Painting Workshop
- Spray gun cleaning: Is it thoroughly cleaned every time the paint is changed or the machine is stopped? Residual dry paint skin is the largest source of particles.
- Workwear cleanliness: Has the surface of the workpiece to be sprayed been thoroughly dedusted and degreased?
- Intake system: Is the filter cotton in the paint booth replaced regularly?
Conclusion: For industrial painting, "thirty percent depends on the paint, seventy percent on the environment." Establishing a standardized cleaning management system can not only improve the product's appearance grade, but also significantly reduce rework costs and win the trust of customers.