Guide to Common Spray Painting Problems, Causes, and Solutions

During spray painting operations, operators often encounter various issues that affect the painting effect and quality. Here is a detailed guide to spray painting problems to help you quickly identify issues, determine their causes, and take appropriate corrective actions.

A. Low or No Material Flow

Causes: Clogged nozzle, clogged suction tube, excessively large material volume setting (shifted too far to the right), loose suction tube, overly thick material, inconsistent paint, loose container.

Solutions: Clean the nozzle and suction tube, adjust to the left, insert properly, check viscosity, filter the paint, tighten the container.

B. Material Leakage

Causes: Loose nozzle, worn nozzle, worn nozzle seal, material buildup on the spray pattern disc and nozzle.

Solutions: Tighten the nozzle, replace the nozzle and nozzle seal, clean the material buildup.

C. Coarse Atomization

Causes: Excessively high material viscosity, excessively large material volume, clogged nozzle, insufficient pressure buildup in the container.

Solutions: Dilute the material, adjust to the right, clean the nozzle, tighten the container.

D. Spray Jet Bouncing

Causes: Material in the container is nearly depleted, overly thick material.

Solutions: Refill the material, check and adjust the material viscosity.

E. Pattern Distortion or Sagging

Causes: Excessive spray painting material.

Solutions: Adjust the material flow rate or increase the spray gun's movement speed.

F. Overspray

Causes: The spray gun is too far from the painted object, excessive spray painting material.

Solutions: Shorten the distance, adjust the material volume setting to the right.

G. Light and Discontinuous Pattern

Causes: The spray gun is moving too fast.

Solutions: Adjust the material flow rate or reduce the spray gun's movement speed.

H. Excessive Paint Mist

Causes: The spray gun is too close to the surface.

Solutions: Move the spray gun away from the surface and reduce the paint flow.

With this guide, you can more effectively address various issues that arise during the spray painting process, ensuring smooth operations and high-quality painting results. We hope this guide will be a valuable assistant in your spray painting work!

1. Single-component paints (e.g. ordinary self-painting paints, nitro paints)

- Direct use of the original paint may be too viscous, you need to add thinner (e.g. banana water, special thinner).

-Suggested ratio: 2:1 or 3:1 for paint and thinner (adjusted according to the viscosity of the paint, refer to the product description).

-Test method: Pick up the diluted paint with a stirring rod, it should be able to flow down naturally in the form of a continuous thin line.

2. Two-component paints (e.g. epoxy paints, polyurethane paints)

-Mix the main paint + curing agent + thinner, the ratio must be strictly according to the instructions (e.g. 4:1:1).

-Attention: too much hardener will lead to rapid curing of the paint and clogging of the spray gun; too little will not dry the paint film.

3. Waterborne paint

- Adjust with water or special waterborne thinner, the ratio is generally 5%~10% (too much will lead to sagging).

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