Flexible Nozzle Applicator for Uniform Coating of Complex Body Panels
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Solution Overview
Problem
Current nozzle applicators, such as rotary atomizers, have limited application efficiency and struggle with high area coating performance and accuracy, especially when painting motor vehicle body components with complex geometries and edges, leading to overspray and inhomogeneous coatings.
Innovation Solution
A flexible nozzle applicator system that can be controlled using valves or mechanical adjustments to switch between large and small area coating performance, aligning nozzles orthogonally or parallel to the movement path, and switch between jet and droplet modes, with precise relative positioning using camera-based or sensor systems to ensure uniform coating on curved and complex surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If rotary atomizers are used for coating, then coating coverage is achieved, but application efficiency is limited and overspray occurs
Solution Approach 1:
The coating system is divided into multiple independent nozzles arranged in a matrix, where each nozzle can be independently controlled. This segmentation allows precise targeting of coating material to the component surface, reducing overspray while maintaining high productivity through parallel operation of multiple nozzles.
Solution Approach 2:
The patent replaces traditional rotary atomizer mechanics with a stationary nozzle array system controlled by electronic valves and a computer. This substitution enables precise control of coating material flow and nozzle activation, eliminating the inherent overspray problems of rotary atomizers while achieving high application efficiency.
2Loss of substance
If printheads with narrowly confined paint jets are used, then overspray is reduced, but area coating performance and accuracy are insufficient for series coating
Solution Approach 1:
The patent combines multiple nozzles into a single integrated applicator head with matrix arrangement. By merging the functions of multiple narrow jets into one coordinated system, the invention achieves both the low-overspray benefit of narrow jets and the high productivity of area coating through simultaneous operation of multiple nozzles under computer control.
Solution Approach 2:
The system dynamically adjusts which nozzles are active based on the component geometry and coating requirements. The computer control system enables real-time switching between different nozzle configurations, allowing the same applicator to adapt to various coating scenarios and maintain high area coating performance while minimizing overspray.
3Adaptability or versatility
If conventional coating methods are used, then simple surfaces are coated, but complex surface geometries and edges cannot be painted satisfactorily
Solution Approach 1:
The patent applies local quality by enabling different nozzles to be selectively activated based on the local geometry of the component. The computer control system identifies which areas require coating and activates only the appropriate nozzles, ensuring accurate coating on complex surfaces and edges while maintaining uniform coating quality across different regions.
Solution Approach 2:
The system incorporates feedback mechanisms where the computer control monitors component position and geometry, adjusting nozzle activation patterns in real-time. This feedback loop ensures that complex surface geometries and edges receive appropriate coating attention, maintaining manufacturing precision across varied component shapes.
Data Source
AI summary
The disclosure concerns a coating method and a corresponding coating device for coating components with a nozzle applicator with several nozzles, in particular for painting motor vehicle body components. The disclosure provides that the nozzle applicator is flexibly controlled during the coating method.