Cured Tire Air Barrier and Dampening Layer for Resonance Noise
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Solution Overview
Problem
Pneumatic tires face challenges in reducing resonance noise and air permeation, as existing dampening elements and air barrier layers are applied before tire curing, limiting their effectiveness and compatibility with cured tire surfaces.
Innovation Solution
A method of applying an air barrier layer and a dampening element to a cured pneumatic tire, where the air barrier layer is directly or indirectly applied to the carcass or innerliner, and the dampening element is adhered to the air barrier layer using suitable adhesives, enhancing noise reduction and air retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If dampening elements are applied to the interior of the tire before curing, then the tire structure is simplified, but the adhesion and effectiveness of the dampening element is reduced
Solution Approach 1:
The patent applies the dampening element to the cured tire interior surface after curing, rather than before. This preliminary action on the cured surface ensures proper adhesion while maintaining tire structure simplicity through the use of adhesive application methods.
2Ease of manufacture
If air barrier layer is applied before tire curing, then the manufacturing process is simplified, but the compatibility and effectiveness with cured tire surface is limited
Solution Approach 1:
The air barrier layer is applied to the cured tire interior surface after curing completes, ensuring compatibility with the cured rubber surface. This timing allows the surface to achieve proper curing characteristics before receiving the air barrier layer.
Solution Approach 2:
The patent uses adhesive systems as intermediaries to bond the air barrier layer to the cured tire interior surface, ensuring proper compatibility and adhesion between the cured rubber surface and the air barrier layer materials.
3Strength
If dampening element is fixed using synthetic-rubber-based adhesive, then the adhesion is improved, but the resonance noise reduction effectiveness is compromised
Solution Approach 1:
The patent modifies the adhesive application parameters by using specific adhesive systems applied in controlled amounts to the cured tire interior surface, achieving both proper adhesion and resonance noise reduction by optimizing the adhesive layer properties rather than relying solely on adhesive type.
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 effectively reduces noise and vibration by improving the adhesion and compatibility of the dampening element with the tire components, while maintaining air retention, thus enhancing the tire's performance in noise reduction and durability.
Implementation Method 1
The air barrier layer can be adhered to the rubber tire by using various adhesive systems including isocyanate-based adhesives in conjunction with heat and pressure
Implementation Method 2
These dampening elements reduce or dampen the resonance noise created by operation of the tire, which noise is believed to be caused when the air in the air cavity of the tire is excited by vibrations at specific frequencies
Implementation Method 3
heat and pressure at the time of vulcanization and molding
Data Source
AI summary
A method of preparing a tire including the steps of providing a cured tire, the tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an optional innerliner layer disposed interior to the carcass layer; directly or indirectly applying an air barrier composition to at least a portion of the carcass layer or to at least a portion of the optional innerliner layer to thereby form an air barrier layer; and directly or indirectly applying a dampening member to the air barrier layer.