Cryogenic Removal of Sealing Agent from Tire Inner Cavity
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Solution Overview
Problem
End-of-use pneumatic tires with a sealing agent layer cannot be recycled due to the damage caused to shredding machines, leading to thermal demolition and waste accumulation.
Innovation Solution
A system and method utilizing a cryogenic fluid to harden the sealing agent layer, followed by mechanical abrasion and suction to remove the layer, allowing for the recycling of the tires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing agent layer is applied to the inner cavity surface of a pneumatic tire, then the sealing performance and puncture resistance are improved, but the tire cannot be recycled and must undergo thermal demolition
Solution Approach 1:
The patent applies preliminary action by removing the sealing agent layer before the tire enters the recycling process. The system uses a jet stream to remove the sealing agent from the inner cavity surface prior to shredding, allowing the tire to be properly recycled while maintaining the sealing benefits during its service life
Solution Approach 2:
The patent extracts the sealing agent layer from the tire inner cavity using a jet stream removal system. This extraction allows the sealing material to be separated from the tire structure, enabling the tire components to be recycled independently while the sealing agent can be recovered or disposed of separately
2Reliability
If a sealing agent layer is applied to the inner cavity surface, then puncture sealing capability is enhanced, but damage occurs to shredding machines during disposal
Solution Approach 1:
The system performs preliminary removal of the sealing agent layer using a jet stream before the tire undergoes shredding. This preliminary action prevents the sealing agent from causing damage to shredding machine components during the recycling process
Solution Approach 2:
The patent converts the potentially harmful sealing agent into a removable layer that can be easily eliminated using a jet stream. The high-velocity jet stream effectively removes the sealing agent without causing damage to the removal system, transforming a harmful substance into a manageable component
3Loss of substance
If thermal demolition is used for tires with sealing agent, then waste disposal is achieved, but energy consumption increases and waste accumulation occurs
Solution Approach 1:
The system extracts the sealing agent layer from the tire using a jet stream removal system, enabling the tire to be recycled through conventional shredding processes. This extraction eliminates the need for energy-intensive thermal demolition while proper waste disposal is achieved through material recovery
Solution Approach 2:
The patent replaces the thermal demolition process with a mechanical jet stream removal system followed by conventional shredding. This substitution dramatically reduces energy consumption while achieving effective waste disposal and material recovery
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
Enables efficient and cost-effective removal of the sealing agent layer, facilitating the recycling of end-of-use pneumatic tires and reducing waste sent to thermal demolition.
Implementation Method 1
utilizing a cryogenic fluid to harden the sealing agent layer
Data Source
AI summary
The invention relates to a method and a system for the processing of an end-of-use pneumatic tire that is provided with an inner lining layer manufactured with a sealing agent intended to seal any punctures and at least partially applied to the surface of an inner cavity of the end-of-use pneumatic tire. The system comprises an applicator device, which is provided with at least one nozzle suitable for dispensing a cryogenic fluid, preferably liquid nitrogen, upon the inner lining layer of sealing agent in such a way that the inner lining layer of sealing agent reaches the solid state; a device for the removal of the inner lining layer of solid sealing agent that is provided with a tool for removing the inner lining layer of solid sealing agent by means of mechanical abrasion; and a circuit for suctioning the solid sealing agent removed by the tool.