Tyre Semifinished Element Deposition Control via Radiation Thickness Measurement

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Solution Overview

Problem

Current methods for tyre production fail to accurately position semifinished elements, leading to excessive overlap or gaps, which can result in tyre quality issues such as excessive thickness or structural lacks, due to the lack of effective control mechanisms for ensuring correct deposition around the forming support.

Innovation Solution

A method and apparatus that utilize radiation to determine the thickness of the radially external layer of the tyre by sending and receiving radiation, processing the reflected radiation to identify parameters representative of the thickness, and comparing these parameters with threshold values to generate an alarm signal for incorrect positioning, thereby preventing further processing of defective tyres.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If radiation-based thickness measurement is implemented, then manufacturing precision of semifinished element deposition is improved, but device complexity increases

Engineering Contradiction:
Improvepositioning accuracy of semifinished elementsVSAvoidcomplexity of control system
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces mechanical measurement methods with a radiation-based optical measurement system. A radiation emitter sends radiation through the radially external layer of the tyre to a detector, which measures the transmitted radiation to determine thickness. This substitution enables non-contact, high-precision measurement of semifinished element positioning without complex mechanical probing systems.

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

Solution Approach 2:

The patent introduces radiation (electromagnetic waves) as an intermediary to measure the thickness of the radially external layer. The radiation passes through the material and carries information about its thickness to the detector, enabling indirect measurement without physical contact with the semifinished elements.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If real-time deposition control is implemented, then reliability of tyre structure is improved, but productivity decreases

Engineering Contradiction:
Improvestructural integrity of tyreVSAvoidproduction speed
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent performs thickness measurement and evaluation during the deposition process itself, before the tyre proceeds to subsequent manufacturing stages. By detecting excessive overlap or gaps in real-time and generating alarm signals immediately, the system prevents defective tyres from advancing, ensuring structural reliability without requiring post-production inspection that would slow overall productivity.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements a feedback control system where the radiation-based thickness measurement provides real-time information about semifinished element positioning. This feedback is processed to determine compliance with predetermined thickness profiles, and alarm signals are generated when deviations are detected, enabling immediate corrective action to maintain tyre structural integrity.

Inventive Principle:
Principle #23Feedback

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 approach allows for accurate and reliable identification of errors in semifinished element arrangement, preventing tyres with structural issues from being further processed and ensuring correct deposition, thus maintaining tyre quality.

Implementation Method 1

sending a first radiation onto at least one component of a tyre being processed, said component being at least partly formed with a plurality of semifinished elements defining a radially external layer of said tyre being processed; receiving a corresponding first reflected radiation from a radially external surface of said tyre being processed

Methodology Applied
Scientific EffectReflection: Reflection

Data Source

PatentUS9207656B2Method for controlling the deposition of semifinished elements for tyre production
Publication Date: 2015.12.08 PIRELLI TYRE SPA
  • US9207656B2 patent drawing
  • US9207656B2 patent drawing
  • US9207656B2 patent drawing

AI summary

A method of controlling the deposition of semifinished elements for tire production, includes: sending a first radiation onto one tire being processed, consisting of one forming support with at least one portion of the tire component laid on the support, the tire component being at least partly formed of a plurality of semifinished elements defining a radially external layer of the tire being processed; receiving a first reflected radiation from a radially external surface of the tire being processed; determining, as a function of the reflected radiation, parameters representative of the thickness of the layer; comparing the parameters with reference values; and generating an alarm signal as a function of the comparison.