Spray Formation of Impermeable Barrier Layer on Tire
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Solution Overview
Problem
Conventional layer-by-layer assembly techniques struggle to effectively apply impermeable barrier layers on complex curved surfaces, such as tires, due to limitations in precision and cost-effectiveness.
Innovation Solution
A method utilizing a spray post system with a rotation platform, reservoir stations, and a rinse delivery system to apply alternating layers of oppositely charged solutions, followed by drying, ensuring complete coverage and uniformity on the tire's inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional layer-by-layer assembly techniques are used on flat substrates, then deposition precision and material control are improved, but applicability to complex curved surfaces deteriorates
Solution Approach 1:
The patent adapts the LbL assembly process to curved surfaces by modifying the deposition geometry. The spray deposition system rotates around the tire circumference, maintaining consistent distance and angle relative to the curved inner surface, enabling uniform layer formation on complex curved geometries that cannot be achieved with conventional flat-substrate techniques
Solution Approach 2:
The invention introduces dynamic elements to the deposition process: the spray system rotates with the tire, allowing continuous coverage of the curved surface. This dynamic adaptation enables the system to maintain precise control over layer deposition while accommodating the three-dimensional geometry of the tire, resolving the contradiction between precision and curved surface applicability
2Adaptability or versatility
If spray deposition is used to apply layers on tire inner surface, then coverage on complex curved surfaces is improved, but manufacturing precision deteriorates
Solution Approach 1:
The spray deposition system employs periodic rotation synchronized with the tire rotation, creating consistent deposition intervals around the curved surface. This periodic action ensures uniform layer thickness and composition across the entire tire inner surface, maintaining manufacturing precision while achieving complete curved surface coverage
Solution Approach 2:
The system maintains continuous spray deposition during tire rotation, ensuring uninterrupted coverage of the curved surface. This continuous action prevents gaps or inconsistencies in the barrier layer formation, achieving both complete coverage and uniform precision on the complex three-dimensional geometry
3Reliability
If thick butyl inner liners are used for air retention, then impermeability is improved, but weight and production cost increase
Solution Approach 1:
The invention changes the fundamental parameters of the barrier layer: instead of using thick butyl rubber (traditional material), it deposits thin multilayer films with alternating positive and negative charges. This parameter change in material composition and layer structure achieves equivalent or superior air retention with dramatically reduced weight, as the LbL assembly creates highly impermeable barriers at molecular levels
4Manufacturing precision
If conventional LbL assembly is used with wash steps, then material purity is improved, but process complexity and cost increase
Solution Approach 1:
The invention extracts and eliminates the wash steps from the conventional LbL assembly process. By using spray deposition with controlled material application, the system achieves adequate material purity without requiring intermediate washing stages, thereby simplifying the overall process architecture and reducing equipment complexity while maintaining acceptable film quality
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 method enables the formation of a robust, impermeable barrier layer on tires, providing effective air retention and preventing gas and fluid diffusion, similar to conventional butyl inner liners, while reducing weight and production costs.
Implementation Method 1
a solution layer is sprayed onto the inner tire surface, after which a rinse is applied prior to spraying another solution layer thereupon
Implementation Method 2
The tire is rotated around a tire axis during spraying of each solution layer and each rinse
Implementation Method 3
Drying may include applying suction to at least a portion of the inner tire surface
Implementation Method 4
deposition of alternating layers of oppositely charged materials is typically performed with intervening wash steps
Data Source
AI summary
A method is provided for forming an impermeable barrier layer on an inner tire surface of a tire. An assembly is also provided along with a kit for forming an impermeable barrier layer on an inner tire surface of a tire accordingly.