Air Cap Port Layout for Spray Pattern Shaping and Atomization
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Solution Overview
Problem
Existing spray guns face challenges in efficiently atomizing and shaping fluid sprays, particularly in air-assisted airless systems, leading to uneven finishes and potential material wastage due to tailing effects.
Innovation Solution
An air cap and spray tip configuration that includes a cap body with projections and passages to direct compressed air flows in specific subsets, enhancing atomization and shaping of the spray pattern by orienting airflows to control the width and thickness of the spray pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional spray guns are used, then the spray fluid can be dispensed through a spray nozzle, but the atomization and shaping of the fluid spray is inefficient, leading to uneven finishes and material wastage
Solution Approach 1:
The air cap is divided into multiple port subsets (first subset and second subset) with ports oriented in different directions. The first subset directs airflows toward a first face of the spray pattern while the second subset directs airflows toward a second face, allowing differentiated control over different regions of the spray pattern to improve atomization and shaping efficiency.
Solution Approach 2:
Different subsets of ports are oriented to direct airflows toward specific faces of the spray pattern. This local differentiation allows each port subset to optimize atomization and shaping for its specific region, with the first subset focusing on the first face and the second subset focusing on the second face, thereby improving overall spray quality and reducing material wastage.
2Ease of operation
If airflows are emitted to assist in atomizing and shaping the fluid spray, then the spray pattern can be controlled, but the device complexity increases due to additional valves and air flow control mechanisms
Solution Approach 1:
The air cap structure serves multiple functions simultaneously: it distributes compressed air to multiple port subsets, controls the direction of airflows toward different faces of the spray pattern, and enables independent adjustment of air flow to each subset through valves. This multi-functionality allows spray pattern control without proportionally increasing device complexity.
Solution Approach 2:
The system allows dynamic control of air flow to different port subsets through valves, enabling real-time adjustment of spray pattern characteristics. The air flow to the first subset and second subset can be independently controlled to adapt to different spraying conditions and requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The configuration achieves a smooth, even finish by improving atomization and shaping, reducing material wastage and ensuring consistent spray patterns across various surfaces.
Implementation Method 1
outputting compressed gas through an air cap and towards the spray pattern such that a first portion of the compressed gas is output through a first plurality of ports and towards the first pattern face and a second portion of the compressed gas is output through a second plurality of ports and towards the second pattern face
Data Source
AI summary
A spray gun includes a spray tip that has a nozzle that is configured to output spray fluid. An air cap is configured to directed flows of compressed gas onto the fluid output to shape and/or atomize the spray fluid. The air cap is configured to output larger volume flows towards faces of the spray output. Adjusting the larger volume flow changes the pattern size of the spray fluid.