Venturi Atomizing Nozzle for Uniform Hollow Body Coating
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Solution Overview
Problem
Existing coating devices fail to achieve uniform distribution of atomized fluid inside hollow bodies due to inefficient atomization processes.
Innovation Solution
A coating device featuring a Venturi arrangement with an atomizing tube and hollow needle, where pressurized propellant gas accelerates the unatomized fluid through a narrow cross section, creating a high flow rate and momentum exchange to produce a uniform aerosol distribution within the hollow body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional atomizing nozzle is used to coat the inside of hollow bodies, then the coating process can be performed, but the distribution of atomized fluid droplets on the inside surface is non-uniform
Solution Approach 1:
The atomizing nozzle is segmented into multiple separate nozzle elements arranged in a specific pattern. Each nozzle element generates its own atomized fluid stream, and the combined effect of multiple streams creates a uniform distribution of droplets across the hollow body interior surface, eliminating the non-uniform distribution problem of single-nozzle systems
Solution Approach 2:
The patent transitions from a single-point atomization source to a multi-point distributed atomization system. By arranging multiple nozzle elements in specific spatial configurations (patterns), the system achieves uniform coverage across the three-dimensional interior surface of hollow bodies, transforming the atomization process from linear to spatial distribution
2Volume of moving object
If the hollow body has a slim structure with small diameter (such as syringes and carpules), then the coating application becomes more challenging, but the coating device must still achieve uniform distribution of atomized fluid
Solution Approach 1:
The patent employs multiple nozzle elements with potentially different characteristics positioned at specific locations to address local requirements within the hollow body. The nozzle arrangement and individual nozzle characteristics are optimized for local conditions, enabling uniform atomization distribution even in slim structures where space constraints would normally prevent adequate coverage
Solution Approach 2:
The coating system incorporates movable or adjustable nozzle elements that can dynamically adapt their positions and orientations based on the specific geometry of the hollow body being coated. This dynamic adjustment capability allows the system to maintain optimal atomization patterns whether coating slim syringes, carpules, or larger containers
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
This configuration ensures a uniform and efficient distribution of atomized fluid droplets inside hollow bodies, achieving a high exit velocity and improved homogeneity of coating, even in slim and small-diameter hollow bodies like syringes and carpules.
Implementation Method 1
the atomizing tube and the hollow needle form a Venturi arrangement. Propellant gas acted on with a pressure is thus introduced into the atomizing tube or the atomizing channel arranged therein
Implementation Method 2
The unatomized fluid exits through the discharge opening of the hollow needle. The discharge opening is arranged such that the fluid can be atomized by the interaction of the hollow needle and atomizing channel
Implementation Method 3
The atomizing nozzle atomizes the fluid and thus generates an aerosol, that is, a mixture of propellant gas, for example, air, and suspended particles or fluid droplets formed from the fluid
Data Source
AI summary
A coating device for coating an inside of a hollow body with an atomized fluid has at least one atomizing tube enclosing an atomizing channel. A pressurized propellant gas for atomizing an unatomized fluid can be introduced into the atomizing tube. The atomizing tube has at least one outlet opening and further has at least one hollow needle having a discharge opening for the unatomized fluid. The at least one hollow needle interacts with the atomizing channel and is arranged essentially coaxially thereto. The atomizing tube and the hollow needle form a Venturi arrangement.