Innerliner RFID Placement in Pneumatic Tires to Prevent Detachment
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Solution Overview
Problem
Existing methods for integrating RFID labels in pneumatic tires face issues such as detachment and innerliner ruptures due to cyclical deformations, particularly when glued to the external surface, and require complex integration within tire structure.
Innovation Solution
The RFID label is applied to the radially inner surface of the innerliner, avoiding areas prone to release agent accumulation during vulcanization, and can be integrated within the tire structure during construction, ensuring secure attachment and preventing innerliner cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the RFID label is glued to the external surface of the pneumatic tire, then the implementation is simple and applicable to existing tires, but the transponder may detach following cyclical deformations
Solution Approach 1:
The patent inverts the conventional approach by moving the RFID label from the external surface to the internal radially inner surface of the pneumatic tire. This inversion allows the label to be positioned in a location that experiences less mechanical stress and deformation during tire operation, thereby preventing detachment while maintaining ease of implementation through integration during the vulcanization process
2Reliability
If the RFID label is glued to the radially inner surface of the innerliner, then attachment reliability improves, but innerliner ruptures may occur near the glued zone due to release agent accumulation
Solution Approach 1:
The patent applies local quality by designating a specific safe zone on the radially inner surface of the innerliner for RFID label placement. This zone is carefully selected to be away from areas where release agent accumulates during vulcanization, typically positioned in the equatorial region or specific angular zones. By making the placement location selective rather than universal, the patent prevents both detachment and rupture simultaneously
Solution Approach 2:
The patent introduces the concept of a safe zone as an intermediary region that mediates between the need for secure label attachment and the need to avoid release agent accumulation. This intermediary zone acts as a buffer that allows the label to be positioned in a location that is mechanically stable during cyclical deformations while being chemically stable during vulcanization
3Reliability
If the RFID label is integrated within the tire structure during construction, then attachment reliability is maximized, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the RFID label integration process with the existing vulcanization process by positioning the label on the radially inner surface before vulcanization and allowing it to be permanently bonded during the curing process. This merging eliminates the need for separate attachment steps, molds, or additional manufacturing operations, thereby achieving maximum attachment reliability without increasing manufacturing complexity
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 solution prevents detachment and innerliner ruptures, maintaining tire impermeability while being economical and easy to implement, with minimal additional components and automation focus.
Implementation Method 1
A pneumatic tire (1) provided with an RFID (Radio Frequency IDentification) label (8)
Data Source
AI summary
A pneumatic tire and method of production thereof are disclosed, wherein the tire comprises an innerliner, which constitutes an inner covering and has the purpose of holding air within the pneumatic tire. A joint of the innerliner confers a cylindrical shape to the innerliner. A radio frequency identification (RFID) label is applied to a radially inner surface of the innerliner which constitutes the innermost free surface of the pneumatic tire, and is completely arranged within a zone which is centered on the joint and which extends circumferentially starting with the joint for no more than 90° per side.