Spray Pattern
Content trust and applicability
Author
TD Engineering Team
Publisher
Shanghai Tudou Technology Co., Ltd. | Shanghai, China
Contact
engineering@tdpaint.comScope
Reference definitions for paint-cell terminology used in feasibility reviews, equipment selection, process setup, and production planning.
Best used for
Best used to create shared vocabulary across engineering, purchasing, operations, integrators, and external suppliers.
Use with caution
Definitions do not replace equipment datasheets, coating TDS/SDS documents, or site-specific compliance review.
Evidence basis
Compiled from TD engineering terminology, project scoping language, and equipment-integration workflows.
Spray pattern is the shape and distribution of atomized paint from the spray gun, typically elliptical. Pattern width, uniformity, and overlap determine coverage efficiency and finish quality.
Why it matters in paint cells
- •Determines coverage efficiency and uniformity
- •Must match part geometry and robot paths
- •Pattern degradation indicates maintenance needs
Key pattern characteristics
- •Width: Measured at specified distance (e.g., 200mm at 250mm gun distance)
- •Distribution: Should be uniform or slightly tapered at edges
- •Atomization: Fine droplets produce smoother finish quality
- •Overlap: Typically 50-66% overlap for uniform coverage
Common pattern problems
- •Heavy center (banana pattern) indicates clogged air cap or worn tip
- •Split pattern suggests too high atomization pressure
- •Teardrop shape indicates fluid or air balance issue
- •Inconsistent pattern width may signal pressure fluctuations