Immersion Sensor for Tire Vulcanization Temperature Control

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Solution Overview

Problem

Monitoring and controlling the temperature of the heating medium within a tire vulcanization system is complex and challenging, especially ensuring reliable detection and homogenization of temperature across the entire volume during the cure cycle, as existing methods often rely on external sensors which are costly and inefficient.

Innovation Solution

A tire vulcanization system with a temperature sensor immersed in the heating medium, configured to detect temperature and generate signals for adjusting the heater output, ensuring precise temperature control and energy balance during the curing cycle, using a monitoring system to command adjustments based on predetermined setpoints and energy calculations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If temperature sensors are arranged exterior to the fluid-tight enclosure in pipelines or supply lines, then the system complexity is reduced, but the temperature measurement precision and reliability deteriorates

Engineering Contradiction:
Improvesensor arrangement complexityVSAvoidheating medium temperature detection accuracy
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces a temperature sensor as an intermediary element that is immersed directly in the heating medium within the fluid-tight enclosure. This sensor acts as a mediator to directly measure the temperature of the heating medium, providing accurate temperature data for the control system to regulate the heating process effectively.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the conventional external pipeline-based temperature measurement system with an internal immersion-based measurement system. By substituting the external mechanical sensor arrangement with an internal sensor directly接触 the heating medium, the system achieves better temperature measurement precision while maintaining manageable complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If temperature sensors are immersed in the heating medium within the fluid-tight enclosure, then the temperature measurement precision and reliability improve, but the device complexity increases

Engineering Contradiction:
Improveheating medium temperature detection accuracyVSAvoidsensor arrangement complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The temperature sensor serves as an intermediary element immersed in the heating medium, directly measuring temperature to provide accurate feedback for the control system. This intermediary approach enables precise temperature monitoring while integrating seamlessly into the existing enclosure structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The heating medium itself serves the dual function of both the working fluid for heat transfer and the medium in which the temperature sensor operates. The heating medium provides the thermal environment necessary for vulcanization while simultaneously enabling direct temperature measurement, eliminating the need for separate measurement pathways.

Inventive Principle:
Principle #25Self-service

3Use of energy by moving object

If the heating medium temperature is not homogenized throughout the enclosure volume, then the energy usage is reduced, but the manufacturing precision of tire vulcanization deteriorates

Engineering Contradiction:
Improveheating medium energy consumptionVSAvoidtire vulcanization quality consistency
Core Design Contradiction:
Use of energy by moving objectVSManufacturing precision

Solution Approach 1:

The patent employs periodic action through the cyclic operation of the heating system, where the heating medium is heated to a target temperature, circulated through the enclosure, and then adjusted based on temperature feedback. This periodic heating and circulation pattern ensures homogeneous temperature distribution throughout the enclosure volume, maintaining consistent tire vulcanization quality while optimizing energy usage by avoiding continuous overheating.

Inventive Principle:
Principle #19Periodic action

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

This solution enables reliable and predictable temperature control of the heating medium, ensuring consistent heat transmission to the tire, optimizing energy usage, and maintaining homogeneous temperature throughout the cure cycle, thereby improving the efficiency and quality of the vulcanization process.

Implementation Method 1

A heater (124) having one or more heating elements (124a) heats the heating medium

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

A fan (26), driven by an ensemble of a rotor (30) and a stator (31) (together forming a motor), agitates the heating medium at a high speed ω with respect to heater (24) so that heat is supplied to the heating medium at a high heat exchange ratio

Methodology Applied
Scientific EffectForced convection: Forced Convection

Data Source

PatentUS10688741B2Regulating temperature during tire vulcanization
Publication Date: 2020.06.23 MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
  • US10688741B2 patent drawing
  • US10688741B2 patent drawing
  • US10688741B2 patent drawing

AI summary

In an electric vulcanization system, a temperature of a heating medium in a fluid-tight enclosure is detected and adjusted during a current curing cycle.