Method and system for applying sealant to a surface of an inner cavity of a pneumatic tire

By introducing a liquid level sensor and control unit into the sealant application system, the flow and application of the sealant are optimized, and the complex extraction and application process caused by the high viscosity of the sealant is solved, achieving uniform application of the sealant and complete emptying of the tank.

CN115427221BActive Publication Date: 2025-03-28BRIDGESTONE EURO NV SA
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Patent Information

Application Number
CN202180030128.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-05-05
Filing Date
2021-05-05
Publication Date
2025-03-28
Estimated Expiration
2041-05-05

AI Technical Summary

Technical Problem

Prior art When applying sealant to the inner cavity surface of pneumatic tires, the extraction and application process is complicated due to the high viscosity of sealant, especially when the sealant is reduced, it is difficult to flow from the side wall of the tank, resulting in cavitation.

Method used

By designing a system, the system includes a collection tank, a heating device, a level sensor and a control unit, which monitors the sealing dose using a level sensor, and the control unit adjusts the operation of the pumping device and the heating device according to the sealing dose changes, and optimizes the flow and application of the sealing agent.

Benefits of technology

A uniform application of sealant is achieved, simplifies the extraction process, avoids damage to the pumping device, and ensures complete emptying of the tank.

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Abstract

A method and system for applying sealant to the inner surface (2) of a pneumatic tire comprises a supply circuit (10) having: a sealant collecting device (11) including a tank (14); a sealant heating device (12); and a sealant supply device (13) implemented by means of: a pumping device (17) for supplying sealant to an application device (7); a piston (26); an extraction element (28) intended to extract the sealant and supply it to the pumping device (17); a piston position control device (30); and a liquid level sensor (29) for detecting the amount of sealant in the tank; wherein the control device (30) actuates the extraction element (28) and the heating element (12) according to the starting depletion position and the completely empty position of the tank by determining the starting depletion position of the tank (14) and the completely empty position of the tank at the position of the liquid level sensor.
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