Tire Vulcanization Coating Agent Air Pocket Prevention
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Solution Overview
Problem
The existing tire vulcanization methods often result in air remaining between the vulcanization mold and the unvulcanized tire, leading to defects like bareness, and there is a lack of effective techniques for ensuring a perfect fit between the tire and the mold.
Innovation Solution
Applying a coating agent comprising at least 70% carbon black, natural rubber latex, and a surfactant as a powder or liquid coating on the tire surface to prevent air pockets during the vulcanization process, ensuring a smooth fit and preventing bareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a balloon-shaped bladder is inflated with high-temperature and high-pressure steam to push against the tire surface, then the vulcanization process can be performed, but air may remain between the mold and tire surface causing bareness defects
Solution Approach 1:
The invention applies a coating agent containing powder particles to the tire surface before vulcanization. This preliminary action modifies the surface properties to prevent air pocket formation, allowing the tire to fit the mold more effectively and eliminating the bareness defect without requiring mold modifications.
Solution Approach 2:
The coating agent acts as an intermediary substance between the tire surface and the mold. It facilitates better contact by modifying surface properties, enabling the tire to conform to the mold shape and preventing air entrapment during the vulcanization process.
2Ease of manufacture
If the unvulcanized tire is directly placed in the mold without surface treatment, then the process is simple, but air remains between the tire and mold preventing proper fitting
Solution Approach 1:
A simple surface coating step is introduced before vulcanization. This preliminary action applies a thin layer of coating agent containing powder particles to the tire surface, significantly improving mold contact and fitting precision while maintaining process simplicity and not requiring complex mold modifications.
3Object-affected harmful factors
If vent holes or slots are added to the mold to prevent air entrapment, then bareness can be prevented in some areas, but the mold design becomes more complex and is restrictive
Solution Approach 1:
The invention extracts the air entrapment problem from the mold design by addressing it at the tire surface level. Instead of modifying the mold structure with vent holes or slots, the coating agent on the tire surface prevents air pocket formation, maintaining simple mold design while effectively preventing bareness.
Solution Approach 2:
The coating agent serves as an intermediary that eliminates the need for complex mold modifications. By modifying the tire surface properties, it prevents air entrapment without requiring vent holes or slots in the mold, thus maintaining structural simplicity.
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 method effectively prevents bareness by ensuring the rubber composition fits the mold without air pockets, resulting in high-quality tires with reduced defects.
Implementation Method 1
The coating agent comprises carbon black, natural rubber latex and a surfactant and a content of the carbon black in the coating agent is not less than 70% by mass.
Implementation Method 2
Applying a coating agent comprising at least 70% carbon black, natural rubber latex, and a surfactant as a powder or liquid coating on the tire surface to prevent air pockets during the vulcanization process
Data Source
AI summary
An object of the present invention is to provide a tire vulcanization method in which there is no air remained between a vulcanization mold and an unvulcanized tire in tire vulcanization, the unvulcanized tire easily fits the vulcanization mold and an occurrence of bareness is prevented. The present invention relates to a tire vulcanization process comprising an application process of applying a coating agent comprising powder on a surface of an unvulcanized tire and a vulcanization process of vulcanizing the unvulcanized tire obtained in the application process, a tire production method comprising the vulcanization method, and a tire produced by the tire production method.