Pre-Vulcanized Tire Crown Structure for Retread Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current retreading technologies for extra-large tires face challenges such as low reuse ratios, poor performance of retreaded tires, and high production costs due to limitations in heat dissipation, wear resistance, and puncture resistance, as well as stringent requirements for carcass condition, leading to inefficient recycling and increased costs for mining enterprises.
Innovation Solution
A pre-vulcanized annular crown for extra-large tires with pattern blocks and grooves on shoulder extending edges, designed to match the tire's unique dimensions and patterns, is used to replace the original crown, allowing for complete removal of old patterns and improved bonding with the carcass, enhancing heat dissipation and wear resistance, and incorporating cooling grooves and sensor installation blind holes for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional retreading technology is used, then production cost is reduced, but the reuse ratio of old carcasses is low and the service life of retreaded tires is short
Solution Approach 1:
The crown is pre-vulcanized separately before being combined with the carcass. This preliminary action allows the crown to be manufactured with optimal structure and properties independent of the carcass condition, enabling higher reuse ratios of old carcasses while maintaining consistent quality and service life of retreaded tires
Solution Approach 2:
The tire is divided into separate components: the carcass and the crown. The crown is manufactured independently as a pre-vulcanized component and then combined with the carcass. This segmentation allows the crown to be optimized for performance while the carcass can be reused from old tires, resolving the contradiction between reuse ratio and manufacturing quality
2Strength
If wide and thick carcasses and treads are used, then load-bearing capacity is improved, but heat dissipation performance deteriorates
Solution Approach 1:
The crown incorporates localized heat dissipation structures including cooling grooves and air channels in specific regions where heat accumulation occurs. This allows the overall thick structure to maintain load-bearing capacity while specific local areas provide enhanced heat dissipation pathways
Solution Approach 2:
The crown structure includes porous regions with air channels and cooling grooves that facilitate heat dissipation. These porous structures allow air flow through the crown, carrying heat away from the high-stress load-bearing regions while maintaining the overall structural integrity and strength
3Temperature
If deeper and wider pattern grooves are added, then heat dissipation performance is improved, but manufacturing complexity increases
Solution Approach 1:
The pattern grooves and cooling structures are incorporated into the crown mold during the pre-vulcanization process. This preliminary action creates the heat dissipation features as integral parts of the crown structure, avoiding the need for additional post-processing steps and reducing overall manufacturing complexity
Solution Approach 2:
The functional pattern grooves for heat dissipation are merged with the structural crown design. The same mold cavities that form the crown shape also create the cooling grooves and air channels, combining heat dissipation functionality with structural formation in a single manufacturing step
4Reliability
If pre-vulcanized crown with complex structures is used, then performance of retreaded tires is improved, but production time increases
Solution Approach 1:
The crown is pre-vulcanized with complex internal structures including cooling grooves and air channels before assembly. This preliminary action allows these performance-enhancing features to be created once during crown manufacturing, rather than requiring complex operations during the retreading process itself, thus improving reliability without significantly increasing total production time
Solution Approach 2:
The complex pre-vulcanization process is segmented into crown manufacturing and final assembly. The time-consuming pre-vulcanization with complex structures is performed separately on the crown component, allowing parallel processing and optimizing the overall production timeline while ensuring high performance of the retreaded tire
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 pre-vulcanized annular crown significantly increases the reuse ratio of old carcasses, improves the performance of retreaded tires by enhancing heat dissipation and wear resistance, and extends the service life of retreaded tires to 80-100% of new tires, while reducing production costs and environmental impact.
Implementation Method 1
enhancing heat dissipation and wear resistance
Implementation Method 2
improve the heat dissipation performance of the tires
Implementation Method 3
Pre-Vulcanised Annular Crown...allowing for complete removal of old patterns and improved bonding with the carcass
Implementation Method 4
incorporating cooling grooves and sensor installation blind holes for improved performance
Data Source
AI summary
The present invention relates to a pre-vulcanized annular crown of an extra-large tire, and a preparation method and an application thereof. The annular crown includes shoulder extending edges, which extend from both sides of the crown to the central direction of the tire along shoulders, where the shoulder extending edges are provided with a structure of pattern blocks and pattern grooves, which extend from a tread to sidewalls and are suitable for the extra-large tire, and outer contour lines of sections of the shoulders and the shoulder extending edges are concave inwards. Pattern grooves in original shoulders can be completely removed when an old tire body is ground, and the crown structure and functional advantages of the extra-large tire which is retreaded can be fully given.