Tire Mold Blade Concave-Convex Sipe Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tire sipes lack optimal dimensional and positional relationships between concave and convex portions, leading to insufficient friction and rigidity, which affects the tire's performance in braking and driving conditions.
Innovation Solution
A tire mold with specific dimensions and arrangements of concave and convex portions on the sipe's inner wall surface, where the average width length of concave portions ranges from 0.0005 mm to 0.5 mm, area from 0.0000002 mm^2 to 0.2 mm^2, and depth from 0.0001 mm to 0.25 mm, along with strategically placed first and second layers, enhances the frictional contact and rigidity of the sipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If concave-convex surface is formed on sipe inner wall to improve draining performance, then water drainage is enhanced, but rigidity of the block deteriorates due to insufficient friction between convex portions
Solution Approach 1:
The patent applies parameter changes by precisely controlling the dimensions of convex portions (width: 0.0005-0.5mm, area: 0.0000002-0.2mm², depth: 0.0001-0.25mm) and their spacing (0.035-0.165mm) to optimize both draining performance and block rigidity. This quantitative parameter optimization resolves the contradiction by finding the optimal balance point where water drainage is sufficient while maintaining structural strength.
Solution Approach 2:
The patent applies local quality by creating concave-convex structures only on the inner wall surfaces of sipes where water drainage is needed, while maintaining the overall block structure integrity. The convex portions are strategically positioned to provide local friction enhancement without compromising the global rigidity of the tire block.
2Strength
If convex portions are added to sipe inner wall to enhance friction, then block rigidity improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent establishes specific parameter ranges for convex portions (width: 0.0005-0.5mm, area: 0.0000002-0.2mm², depth: 0.0001-0.25mm) and spacing (0.035-0.165mm) that balance manufacturing feasibility with performance requirements. These standardized parameter ranges make it easier to achieve the desired rigidity without excessive manufacturing precision demands.
3Strength
If multiple layers are formed on blade side surface to optimize sipe structure, then friction and rigidity improve, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the blade side surface into multiple layers with distinct functions. Each layer contains convex portions with specific dimensional characteristics, allowing optimization of different aspects of sipe performance (friction, drainage, rigidity) independently while maintaining overall system coherence.
Solution Approach 2:
The patent applies dimensionality change by extending the concave-convex structures across multiple layers in the depth direction of the blade. This multi-layer approach adds a depth dimension to the sipe structure, enabling enhanced friction and rigidity control without significantly increasing lateral or longitudinal complexity.
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 optimized sipe design improves the rigidity of the tire blocks, enhances friction resistance, and supports better deformation resistance during braking and driving, resulting in improved braking performance and tire stability.
Implementation Method 1
the convex portions facing each other on the inner wall surfaces are not meshed depending on the shape of the concave-convex surface, and therefore sufficient friction is not generated
Implementation Method 2
surface tension of water entered into the sipe is relaxed so that the water in the sipe flows easily
Data Source
Figure 1~2
Figure 3
Figure 4(a)~4(b)
AI summary
A tire mold (20) includes a mold surface for vulcanizing and molding a tire (10), and a blade (26) for vulcanizing and molding a sipe (14) formed in the mold surface. The blade (26) includes a concave-convex surface in which a plurality of convex portions (30) formed adjacent to each other and a plurality of concave portions (40) formed between the adjacent convex portions (30) adjacent to each other are formed. A length of the concave portion (40) is smaller than a length of the convex portion (30) in a concave-convex surface view. The concave portion (40) is sharp in a depth direction of the concave portion (40).