Colored Organopolysiloxane Release Agent for Even Green Tire Vulcanization
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Solution Overview
Problem
Existing mold release agents for tire vulcanization are difficult to apply evenly and visually control, leading to potential demolding issues and appearance defects, and they may not maintain their visibility during the vulcanization process.
Innovation Solution
A colored organopolysiloxane-based mold release agent composition in the form of an oil-in-water emulsion, containing a non-fluorescent pigment, is applied to the green tire or bladder, allowing visual control of application and ensuring even coverage, which disappears after vulcanization without affecting the tire's appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional mold release agent is applied to the green tire or bladder, then lubrication is provided to prevent sticking and facilitate demolding, but the application is difficult to control visually and may result in uneven coverage
Solution Approach 1:
The mold release agent composition includes a pigment that provides color to the composition. When applied to the green tire or bladder, the colored composition allows operators to visually control and verify even application coverage. The color disappears after vulcanization, so it does not affect the final tire appearance. This directly resolves the contradiction by enabling visual monitoring of application quality without compromising the precision of coverage.
2Reliability
If a mold release agent is used to prevent bladder sticking to the tire, then demolding issues are prevented, but the agent must be applied evenly to avoid appearance defects
Solution Approach 1:
The colored release agent enables operators to visually verify even application coverage before vulcanization, ensuring that no areas are missed or over-applied. This visual control prevents appearance defects on the final tire. The color disappears during vulcanization, so it does not affect the tire's appearance quality. This resolves the contradiction by providing a temporary visual indicator that ensures both reliable demolding and high appearance quality.
Solution Approach 2:
The pigment acts as an intermediary that temporarily marks the application areas of the release agent. It mediates between the need for even application (to prevent appearance defects) and the need for visual control. The pigment is carried by the release agent composition and disappears after serving its purpose during vulcanization, leaving no trace on the final product.
3Difficulty of detecting and measuring
If the release agent composition maintains visibility during vulcanization, then application coverage can be monitored, but it may affect the tire's final appearance
Solution Approach 1:
The pigment in the release agent composition is designed to disappear during the vulcanization process. This allows the composition to maintain visibility during application and monitoring, enabling operators to detect and measure coverage quality. During vulcanization, the color disappears, ensuring that the final tire appearance is not affected. This directly resolves the contradiction by providing temporary visibility that fades when no longer needed.
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 colored composition provides clear, even application visible to the naked eye, ensuring proper lubrication and preventing demolding issues while maintaining the tire's appearance by disappearing post-vulcanization.
Implementation Method 1
If adequate lubrication is not provided between the bladder and the inner surface of the casing during the expansion phase of the bladder before the casing is completely vulcanized. Similarly, there is also a considerable relative movement between the outer contact surface of the bladder and the inner surface of the molded and vulcanized casing
Implementation Method 2
at least one pigment (C) other than a fluorescent pigment; the interior of the tire obtained in step 3) no longer showing any coloration visible to the naked eye
Data Source
AI summary
The invention relates to a method for vulcanizing a green tire using an organopolysiloxane-based mold release agent lubricant composition. The invention also relates to an organopolysiloxane-based mold release agent lubricant composition.