Dual-Material Sole for Footwear Shock Absorption
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Solution Overview
Problem
Existing footwear technologies fail to effectively absorb shock loads and provide comfort for extended wear, particularly at the heel area, due to increased manufacturing complexity and costs associated with multiple materials and layers.
Innovation Solution
A footwear article with a sole composed of two polymeric materials, one in gel form and the other in expanded form, co-molded to create a unitary construct that is flexible and elastic, providing substantial flexion and load dampening, with the gel material offering arch support and the expanded material ensuring durability and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If shock absorptive inserts, foam rubber, or air cushioning devices are used to increase comfort and conformity to the foot, then comfort and shock absorption are improved, but manufacturing costs and production complexity increase
Solution Approach 1:
The patent applies composite materials by combining a gel material (first polymeric material) with a foam material (second polymeric material) in a single sole structure. The gel material provides superior shock absorption and comfort properties, while the foam material provides structural support and flexibility. This composite approach achieves enhanced comfort without requiring multiple separate components or complex assembly processes, as the materials are integrated into a unitary sole construction.
Solution Approach 2:
The patent applies local quality by positioning the gel material specifically in the heel portion (rearward portion) of the sole where shock absorption is most needed, while using foam material in other portions of the sole. This localized application of different material properties optimizes comfort and shock absorption exactly where required, while maintaining overall structural integrity and avoiding unnecessary complexity in areas where gel material is not needed.
2Ease of operation
If multiple materials and layers are used to provide shock absorption, then comfort is improved, but manufacturing complexity and costs increase
Solution Approach 1:
The patent applies merging by combining the gel material and foam material into a unitary sole construction through co-molding or integral forming processes. Rather than manufacturing separate gel inserts and foam soles that require assembly, the invention integrates both materials into a single molded component, significantly simplifying manufacturing while maintaining the comfort benefits of both materials.
Solution Approach 2:
The patent uses composite materials (gel and foam) that can be co-molded or integrally formed together in a single manufacturing process. This approach allows the benefits of multiple materials to be achieved without the complexity of multi-step assembly operations, as the composite sole is produced as a unified component through advanced molding techniques.
3Object-affected harmful factors
If a gel material is used in the heel portion for shock absorption, then shock absorption and comfort are improved, but the sole may become less flexible
Solution Approach 1:
The patent applies local quality by restricting the gel material to the heel portion of the sole where shock absorption is most critical, while using flexible foam material in the forefoot and midfoot areas. This localized placement ensures that the gel material provides maximum shock absorption where needed without compromising the overall flexibility of the sole, as the foam portions maintain the sole's ability to bend and conform to the foot's natural movement.
Solution Approach 2:
The patent uses a composite material system where the gel material and foam material work together to balance shock absorption and flexibility. The gel provides viscoelastic shock absorption in the heel, while the foam provides structural flexibility and rebound. This material combination allows the sole to be both cushioned and flexible, as each material compensates for the other's limitations.
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 solution enhances comfort and durability by maintaining structural integrity under repetitive flexion, reducing manufacturing complexity and costs, while providing effective shock absorption and arch support, thus addressing the limitations of prior art.
Implementation Method 1
the first portion provides for dampening of load imparted to the foot of the person upon contact with a surface
Implementation Method 2
the sole is substantially flexible and elastic so as to allow for substantial flexion of the sole longitudinally and return
Data Source
Figure 1a~1c
Figure 2a~2h
Figure 3a~3e
AI summary
A footwear article (100) comprising a generally elongate sole (10) for engagement with and support of the foot of a person, said sole having an upper surface (12), a lower surface (14), a first portion being for interaction with at least the heel region of the foot of the person and a second portion for interaction with at least the metatarsal region of the foot of the person; and a foot engagement means for securing the footwear article to the foot of a person. The footwear article being characterised in that a first portion of the sole includes a first material having a first material property and the a second portion of the sole includes a second material having a second material property; and said first portion and said second portion extend at least to the upper surface of the sole and first material property provides for dampening of load imparted to the foot of the person upon contact with a surface.