Pneumatic Tire Repair Patch Placement to Reduce Patch Size
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Solution Overview
Problem
The conventional method of repairing pneumatic tires by increasing the size of the repair patch to prevent peeling results in higher costs.
Innovation Solution
A method for producing a repaired pneumatic tire by placing the repair patch with its outer end inside the maximum width belt layer and inner end outside the tire maximum width position, using a reinforcement layer of parallel reinforcement cords surrounded by unvulcanized rubber, and vulcanizing the tire under specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of the repair patch is increased to prevent peeling in high deformation areas, then the reliability of the repair is improved, but the cost increases
Solution Approach 1:
The patent changes the placement parameters of the repair patch by defining specific radial position constraints (outer end inside maximum width belt layer, inner end outside tire maximum width position) rather than simply increasing patch size, thereby maintaining adhesion reliability while controlling material quantity
Solution Approach 2:
The patent applies preliminary reinforcement by positioning the repair patch to overlap with the belt layer structure before vulcanization, ensuring that the patch is pre-aligned with high-strength structural zones that will prevent peeling during subsequent tire deformation
2Area of stationary object
If the repair patch extends into high deformation areas, then complete coverage of the damaged area is achieved, but tire deformation causes the patch to peel off
Solution Approach 1:
The patent applies local quality by concentrating the repair patch in specific radial zones where structural support from the belt layer provides enhanced adhesion stability, rather than uniformly distributing the patch across all deformation-prone areas
Solution Approach 2:
The patent creates a composite structure by overlapping the repair patch with the belt layer in specific radial positions, combining the patch material with the underlying belt structure to form a reinforced composite that resists peeling during deformation
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
Reduces the size of the repair patch while maintaining adhesion, thereby reducing costs and enabling effective repairs without increasing patch size.
Implementation Method 1
a vulcanization process vulcanizing a tire with the repair patch placed thereon
Data Source
AI summary
The method for producing a repaired pneumatic tire according to the present disclosure includes: a placement process placing a repair patch, comprising a reinforcement layer consisting of a plurality of reinforcement cords arranged in parallel with each other and surrounded by unvulcanized rubber, on an area to be repaired; and a vulcanization process vulcanizing a tire with the repair patch placed thereon, and in the repaired pneumatic tire, an outer end in the tire radial direction of the repair patch is located on an inner side in the tire width direction than an end of a maximum width belt layer that has the largest width in the tire width direction among the one or more belt layers, and an inner end in the tire radial direction of the repair patch is located on an outer side in the tire radial direction than a tire maximum width position.