Motorcycle Tire Tread Shallow Grooves for Silicone Residue Removal
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Solution Overview
Problem
Pneumatic tires manufactured using release agents, such as silicone, exhibit reduced performance due to residue on the tread portion, necessitating wear to fully demonstrate their capabilities, which complicates early visualization of tire performance.
Innovation Solution
Incorporating shallow grooves in the tread portion with specific dimensions and configurations, including circumferential and widthwise grooves, to facilitate wear and enhance drainage, grip, and visibility, thereby allowing the tire to exhibit performance earlier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a release agent is sprayed onto the mold portion to prevent adhesion of the vulcanized tire, then the tire can be smoothly separated from the vulcanizing apparatus, but silicone or other components of the release agent move to the tread portion, reducing the tire's original performance
Solution Approach 1:
The patent applies preliminary action by pre-forming shallow grooves in the tread portion before vulcanization. These grooves are strategically designed to facilitate the removal of release agent residues through subsequent wear, allowing the tire to achieve optimal performance quickly without being permanently compromised by the necessary use of release agents during manufacturing
2Reliability
If the tread portion wears to a certain degree to remove silicone residues, then the tire can fully exhibit its performance, but the tire cannot early exhibit its full performance capabilities
Solution Approach 1:
The shallow grooves are pre-formed in advance to accelerate the removal process of release agent residues. This preliminary structural preparation enables the tread to reach its optimal performance state much faster than a smooth tread would, reducing the break-in period while maintaining full performance capabilities
Solution Approach 2:
The patent changes the surface parameters of the tread by introducing shallow grooves with specific dimensions (width of 0.1 to 2.0 mm and depth of 0.1 to 2.0 mm). These parameter changes create controlled wear patterns that rapidly remove silicone residues, transforming the tread surface to achieve optimal performance characteristics in a shorter time period
3Reliability
If shallow grooves are provided in the tread portion to promote wear, then the tire can early exhibit performance and visual confirmation of wear is enabled, but the tread structure becomes more complex
Solution Approach 1:
Rather than making the entire tread complex, the patent applies local quality by introducing shallow grooves only in specific regions where they are most effective for removing release agent residues. The grooves have controlled dimensions and patterns that provide the necessary functionality without unnecessarily complicating the overall tread structure
Solution Approach 2:
The patent carefully controls the parameters of the shallow grooves (width: 0.1 to 2.0 mm, depth: 0.1 to 2.0 mm) to achieve the desired effect with minimal structural complexity. By optimizing these parameters, the tread design achieves early performance exhibition without excessive complexity in the groove configuration
Data Source
Figure 1~2(h)
Figure 3(a)~4(g)
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AI summary
Provided is a pneumatic tire for a motorcycle that is capable of early exhibiting performance of a new tire and that enables it to be visually confirmed that the new tire is worn to a degree that the tire can fully exhibit the performance. The pneumatic tire for a motorcycle includes a tread portion 1 formed into a ring shape, in which the tread portion 1 is provided with shallow grooves 2 having a width of 0.1 to 2.0 mm and a depth of 0.1 to 2.0 mm and extending in a tire circumferential direction.