Rotating Mixing Nozzle for Uniform Cavity Coating
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Solution Overview
Problem
Existing methods for applying cavity preserving agents in automotive production often result in incomplete deposition on surfaces, leading to uneven layer thickness and potential corrosion issues.
Innovation Solution
A method and apparatus utilizing a mixing nozzle unit with separate feed channels for the cavity preserving agent and atomization gas, allowing for atomized or nebulized discharge, and featuring a rotatable design to ensure homogeneous and reproducible coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cavity preserving agent is discharged in atomized form using existing methods, then coverage of cavity surfaces is improved, but layer thickness uniformity deteriorates
Solution Approach 1:
The feed system is segmented into separate feed channels for cavity preserving agent and atomization gas, allowing independent control of each fluid stream. This segmentation enables precise regulation of atomization parameters to achieve uniform layer thickness while maintaining reliable corrosion protection.
Solution Approach 2:
The invention changes the parameters of atomization by using separate feed channels to independently control the cavity preserving agent and atomization gas. This allows optimization of droplet size distribution and spray pattern to achieve both uniform layer thickness and reliable corrosion protection.
2Manufacturing precision
If a rotatable mixing nozzle unit is used for atomized discharge, then coating homogeneity is improved, but device complexity increases
Solution Approach 1:
The mixing nozzle unit combines multiple functions into a single integrated component: it mixes the cavity preserving agent and atomization gas, atomizes the agent, and rotates to provide uniform 360-degree coverage. This merging of functions achieves coating homogeneity while the compact design keeps complexity manageable.
Solution Approach 2:
The rotatable mixing nozzle unit serves multiple purposes: it acts as a mixing chamber, an atomization device, and a distribution mechanism. This multi-functionality enables uniform coating application throughout the cavity while avoiding the need for multiple separate components.
3Manufacturing precision
If separate feed channels are used for cavity preserving agent and atomization gas, then atomization quality is improved, but device complexity increases
Solution Approach 1:
The feed channels are nested within the mixing nozzle unit structure, with the cavity preserving agent channel and atomization gas channel integrated into the same component. This nesting arrangement provides separate feed paths while maintaining a compact overall device structure.
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 solution enables the formation of a high-quality, uniformly thick protective layer on the inner surfaces of vehicle cavities, effectively preventing corrosion and improving the overall quality of the coating process.
Implementation Method 1
The mixing nozzle is responsible for the atomization of the separately fed fluids, that is to say of the liquid cavity preserving agent and the gaseous atomization medium
Implementation Method 2
the mixing nozzle unit being rotated about the rotational axis with respect to the hollow body during the discharge or between a plurality of discharge phases
Data Source
AI summary
A method for preserving cavities by applying a protective layer to the interior of a hollow body. The method uses a mixing nozzle unit coupled to a rotor unit. The mixing nozzle unit is rotated about an axis of rotation and has a mixing nozzle. The mixing nozzle unit has two supply channels for the cavity preservative and for gas for atomizing the cavity preservative. The supply channels run in the direction of the axis of rotation and conduct cavity preservative and atomizing gas separately to the mixing nozzle. The mixing nozzle unit is inserted into the hollow body in the direction of the axis of rotation through an opening in the hollow body. The cavity preservative is discharged in atomized form, and the mixing nozzle unit is rotated about the axis of rotation relative to the hollow body during the discharging or between a plurality of discharging phases.