Pneumatic Tire Sidewall Textile Coating for Durable Rim Abrasion Protection
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Solution Overview
Problem
Existing pneumatic tires face challenges in securely fixing textile surface structures on the outer sidewall areas in a durable manner, particularly in areas that come into contact with the rim flanges, without compromising tire aesthetics or functionality.
Innovation Solution
The textile surface structures in the tire design have radially outer and inner edge sections that are free of coating, allowing them to be vulcanized into the tread and bead areas, respectively, ensuring durable fixation without complete external coating, which also allows for tire weight reduction and reduced rolling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If textile surface structures are completely coated with hard material particles on the outside, then abrasion protection is improved, but fixation durability into the tire components deteriorates
Solution Approach 1:
The textile surface structures are selectively coated: the middle layer section receives a coating with hard material particles for abrasion protection, while the radially outer and inner edge sections remain uncoated to enable direct vulcanization bonding with rubber components. This local differentiation resolves the contradiction by providing abrasion protection where needed while maintaining fixation capability at the edges.
2Object-affected harmful factors
If textile surface structures are completely coated on the outside, then abrasion resistance is improved, but tire weight increases
Solution Approach 1:
Instead of complete coating, only the middle layer section of the textile surface structures is coated with hard material particles. The edge sections remain uncoated, reducing the total amount of coating material applied and thereby reducing tire weight while still providing adequate abrasion protection in the critical middle areas.
3Object-affected harmful factors
If textile surface structures are completely coated on the outside, then abrasion protection is improved, but manufacturing complexity increases
Solution Approach 1:
The coating process is simplified by applying coating only to the middle layer section of the textile surface structures, excluding the edge sections. This reduces the complexity of the coating application process and eliminates the need for complex masking or selective application mechanisms that would be required for complete or partial coating of all sections.
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 provides a durable and lightweight tire design with improved abrasion resistance and reduced rolling resistance by securely integrating textile structures into the tire components while maintaining aesthetic flexibility for sidewall markings.
Implementation Method 1
the radially outer edge sections are vulcanized in the tread area in this way, wherein the coatings are applied at least to a partial section of the middle layer section of the textile surface structures
Data Source
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AI summary
The invention relates to a pneumatic vehicle tyre with a tread region (1), sidewall regions (8), a carcass insert (3) consisting of at least one ply of reinforcing supports embedded in a carcass rubber lining, with bead regions having bead cores (5) and rim contact regions, and with sheet materials (10) made of textile fibres as abrasion-resistant plies arranged as the outermost plies on the sidewall regions (8), wherein a coating (11) containing hard material particles is applied at least to the outer side of the fibres of the abrasion-resistant plies, and wherein the textile sheet materials (10) each have a central layer section (10a), a radially outer edge section (10b) and a radially inner edge section (10c), wherein the radially outer edge sections (10b) extend into the tread region (1) on the shoulder side and the radially inner edge sections (10c) extend into the bead regions or into the rim contact regions. The radially outer edge sections (10b) of the textile sheet material (10) are free of the coating (11) or have end sections that are free of the coating (11) and are vulcanised into the tread region (1) like this, wherein the coating (11) is applied respectively at least to a portion of the central layer section (10a) of the textile sheet material (10).