Twisted Metallic Tire Cord for Part-Load Elongation and Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metallic reinforcing cords for tires lack sufficient part load elongation, which is necessary for certain structural components like zero degrees belt layers, and they do not allow adequate adhesion of elastomeric material, leading to potential corrosion and fretting issues.
Innovation Solution
The development of metallic reinforcing cords with a specific construction that includes twisting multiple metallic wires together with a predetermined twisting pitch, allowing for a high part load elongation and adequate penetration of elastomeric material between the wires, thereby enhancing adhesion and preventing corrosion and fretting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic reinforcing cords are used, then fatigue resistance and thermostability are improved, but part load elongation is insufficient
Solution Approach 1:
The metallic reinforcing cord employs a dynamic helical construction where individual wires are twisted together at a predetermined pitch, allowing the structure to flex and elongate under part load conditions while maintaining fatigue resistance. The helical geometry enables dynamic adjustment of wire orientation and spacing in response to applied loads.
Solution Approach 2:
The invention changes the structural parameters of metallic reinforcing cords by specifying a helical twist configuration with predetermined pitch, transforming rigid parallel wires into a flexible helical structure that achieves both fatigue resistance and adequate part load elongation.
2Stability of the object's composition
If metallic reinforcing cords are used, then thermostability is improved, but adhesion of elastomeric material is insufficient
Solution Approach 1:
The helical construction of the metallic reinforcing cord creates inherent porosity and spacing between the twisted wires, allowing elastomeric material to penetrate and adhere effectively to the metallic surface while maintaining the thermostability of the metallic structure.
Data Source
AI summary
The invention relates to a metallic reinforcing cord (10) for tyres for vehicle wheels, comprising a plurality of metallic wires (11) twisted to one another with a single twisting pitch (P), or a single metallic wire twisted with at least one second metallic wire with a single twisting pitch, or a plurality of first metallic wires twisted to one another with a first twisting pitch to define a first strand of metallic wires and at least one second metallic wire twisted with said first strand of metallic wires with a second twisting pitch equal to or different from the first twisting pitch. The metallic reinforcing cord (10) has a part load elongation greater than or equal to 1%.