Unvulcanized Tyre Dynamic Balancing Before Vulcanization

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Solution Overview

Problem

Existing tire preparation methods fail to effectively address imperfections in unvulcanized tires, leading to issues such as vibrations and stability problems during vehicle operation, necessitating improved quality control and manufacturing optimization.

Innovation Solution

A method involving dynamic balance measurement and correction of unvulcanized tires through categorization, positioning adjustments, and dynamic balancing using robotic arms and rubber elements, along with radial force variation analysis, to ensure precise tire assembly and vulcanization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional tire preparation methods are used without dynamic balance measurement, then manufacturing process is simpler and faster, but tire quality deteriorates with vibrations and stability problems

Engineering Contradiction:
Improvetire qualityVSAvoidmanufacturing process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by measuring the dynamic balance of the unvulcanized tire before vulcanization and correcting any imperfections at this stage. The tire is classified into categories based on balance measurements, and corrections are made before the tire is cured, preventing quality issues from developing in the final product.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by using measuring devices to assess the dynamic balance of unvulcanized tires, classifying them into different categories based on balance imperfections, and then applying targeted corrections. This closed-loop approach ensures that quality issues are identified and resolved systematically.

Inventive Principle:
Principle #23Feedback

2Reliability

If dynamic balance measurement and correction is implemented, then tire quality improves by reducing vibrations, but manufacturing time increases

Engineering Contradiction:
Improvetire stabilityVSAvoidmanufacturing time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

By performing balance measurement and correction on unvulcanized tires before vulcanization, the patent avoids the need for time-consuming post-vulcanization adjustments. The preliminary correction prevents quality issues from manifesting in the final product, reducing overall manufacturing time despite the added measurement step.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent applies local quality by classifying tires into different categories based on their specific balance imperfections and applying targeted corrections only where needed. This selective approach optimizes manufacturing time by focusing resources on tires that require correction rather than processing all tires uniformly.

Inventive Principle:
Principle #3Local quality

3Measurement precision

If unvulcanized tires are classified into multiple categories based on balance imperfections, then quality control precision improves, but device complexity increases

Engineering Contradiction:
Improvebalance measurement precisionVSAvoidclassification system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing unvulcanized tires into distinct categories (first category with no or minor imperfections, second category with correctable imperfections, third category with severe imperfections) based on dynamic balance measurements. This segmentation enables targeted quality control measures for each group, improving measurement precision while managing system complexity through structured classification.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP4613469A1Method and system for preparing a tyre
Publication Date: 2025.09.10 GOODYEAR FRANCE SAS
  • EP4613469A1 patent drawingFigure 1~2
  • EP4613469A1 patent drawing
  • EP4613469A1 patent drawing

AI summary

The present invention relates to a method for preparing a tire comprising quality control by measuring the dynamic balance of an unvulcanized tire and a system or plant for preparing tires to carry out the method according to the present invention.