Retreaded Tire Radial Position Shift for Delamination Resistance
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Solution Overview
Problem
Conventional retreaded tire manufacturing methods result in a consistent buffed surface position, leading to a decline in delamination resistance and durability with repeated retreading, as the buffed surface deteriorates due to repeated curing, causing a drop in tire durability.
Innovation Solution
The method involves changing the position of the tread application surface radially as the repeat count of retreading increases, ensuring that the buffed surface is never formed in the same position, thereby preventing deterioration and maintaining delamination resistance, and optionally forming the tread application surface radially inward or outside of a restraining member to facilitate reuse and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the buffing operation is repeatedly performed at the same position to remove tread rubber, then the tread rubber can be effectively removed, but the buffed surface deteriorates due to repeated curing, causing a drop in delamination resistance and tire durability
Solution Approach 1:
The invention changes the buffing position from a fixed location to a moving location along the radial direction of the tire. By radially shifting the buffing position with each retreading cycle, the treatment is distributed across different regions of the tire structure, preventing localized deterioration and maintaining delamination resistance over multiple retreading operations
Solution Approach 2:
The invention introduces dynamic adjustment of the buffing position rather than using a static fixed position. The buffing position is varied radially depending on the retreading cycle number, making the process adaptive and preventing the cumulative damage that occurs with repeated treatment at the same location
2Productivity
If the tread rubber is abraded away at a fixed position, then the manufacturing process is simple and efficient, but the repeated curing at the same position causes deterioration of the buffed surface
Solution Approach 1:
The invention adds radial positioning variation to the buffing process. Instead of maintaining a constant buffing position for simplicity, the position is adjusted radially based on the retreading cycle, which prevents surface deterioration while maintaining manufacturing efficiency through systematic position management
3Ease of manufacture
If the same buffing position is used for multiple retreading operations, then the process is consistent and easy to control, but the delamination resistance of new tread rubber drops due to surface deterioration
Solution Approach 1:
The invention implements a dynamic buffing position adjustment system that adapts to the retreading cycle number. This systematic variation maintains process controllability through defined position-c cycle relationships while preventing the cumulative surface deterioration that would occur with fixed-position buffing
Solution Approach 2:
The invention resolves the contradiction by introducing radial position variation as an additional control dimension. This allows the process to maintain consistency through systematic position management while avoiding the degradation associated with repeated treatment at a single location
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 approach maintains the durability of retreaded tires equivalent to new tires by preventing the formation of a consistent buffed surface, enhancing delamination resistance and allowing for the reuse of components, thus extending the tire's lifespan.
Implementation Method 1
a buffing operation is first carried out to abrade the outer periphery of a tire away
Implementation Method 2
the tire is placed in a curing unit. Thus a retreaded tire is obtained as a finished product of a base tire and new tread rubber integrated with each other
Data Source
AI summary
A retreaded tire manufacturing method, which avoids forming the buffed surface always in the same position by buffing in tire retreading and the resulting drop in delamination resistance of new tread rubber, and tires suitably retreaded by this manufacturing method are provided. In this method, the tread rubber of a tire is abraded away circumferentially to form a tread application surface of the tire to which new tread rubber is applied. And the position where the tread application surface is formed is radially changed as the repeat count of retreading rises.