Pneumatic Tire Sidewall Decorative Pattern Gradient
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Solution Overview
Problem
Existing decorative portions on pneumatic tire sidewalls do not adequately conceal convexoconcave imperfections, which can affect the aesthetic appeal of the tire.
Innovation Solution
A decorative portion on the tire sidewall featuring a combination of first and second pattern areas with varying occupied areas and surface aspects, divided into multiple zones by parallel lines, creating a complex, non-uniform pattern that increases visibility and disguises convexoconcave imperfections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple decorative portion is provided on the sidewall, then the manufacturing cost is reduced, but the convexoconcave imperfections remain noticeable
Solution Approach 1:
The decorative portion is divided into multiple decorative zones (first, second, third zones) with progressively increasing occupied areas of the first pattern area. This segmentation creates a gradient effect that effectively masks convexoconcave imperfections while maintaining reasonable manufacturing complexity
Solution Approach 2:
Different pattern areas (first and second pattern areas) are created with different surface aspects and occupied areas within each decorative zone. This local variation in pattern density and surface texture provides enhanced visual masking of imperfections without requiring complete redesign of the entire decorative portion
2Object-affected harmful factors
If a complex decorative portion with multiple zones and pattern areas is provided, then the convexoconcave imperfections are better concealed, but the device complexity increases
Solution Approach 1:
The decorative portion is systematically divided into three decorative zones along the tire circumferential direction, with each zone containing first and second pattern areas. This structured segmentation provides a methodical approach to masking imperfections while maintaining organized manufacturing processes
Solution Approach 2:
The occupied area of the first pattern area is systematically varied across different decorative zones (increasing from first to third zone), creating a gradient effect. This parameter change provides effective imperfection masking through progressive density variation rather than random complexity
3Productivity
If the occupied area of the first pattern area is uniformly distributed across all decorative zones, then the manufacturing process is simplified, but the aesthetic appearance and imperfection masking are insufficient
Solution Approach 1:
The first pattern area occupies different proportions in each decorative zone, with the occupied area progressively increasing from the first to the third zone. This local variation in pattern density creates visual interest and effective imperfection masking while maintaining a systematic manufacturing approach
Solution Approach 2:
The occupied area parameter of the first pattern area is deliberately changed across decorative zones to create a gradient effect. This parameter variation enhances both aesthetic appearance and imperfection masking capability without requiring completely different manufacturing processes for each zone
Data Source
AI summary
A pneumatic tire comprises a sidewall portion of which outer surface is provided with a decorative portion extending in the tire circumferential direction in an arc shape. The decorative portion is formed from a first pattern area and a second pattern area having different surface aspects. When the decorative portion is divided into a number N of decorative zones (N>2) by equally-spaced parallel straight lines which are perpendicular to a reference center line extending in a tire radial direction, percentages of occupied area of the first pattern area in the respective decorative zones are gradually increased from the radially innermost decorative zone to the radially outermost decorative zone.