Half-Insert Shoe Insole With Integrated Waist Core
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Solution Overview
Problem
Conventional shoe molded insoles made of paper deform easily under pressure and have a short lifespan, especially in humid environments, affecting comfort and durability.
Innovation Solution
A half fork insole with a rigid plastic main body and integrated waist core, featuring locating holes and beveled edges, and a surface material layer, formed through injection molding for enhanced structural integrity and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If paper insole is used, then manufacturing cost is low, but the insole deforms easily under pressure and has short lifespan
Solution Approach 1:
The patent uses a composite structure combining rigid plastic main body with fabric, paper, or plastic surface material layers. This composite approach provides the strength and durability of plastic while allowing the use of traditional materials for the surface layer, resolving the contradiction between structural integrity and manufacturing complexity.
Solution Approach 2:
The waist core is enveloped within the rigid plastic main body, creating a nested structure where the waist core is embedded in the main body through injection molding. This nested design enhances structural strength without requiring separate assembly steps, maintaining ease of manufacture.
2Reliability
If paper insole is used, then manufacturing cost is low, but the insole is damaged easily in humid environment
Solution Approach 1:
By replacing the traditional paper base with rigid plastic material for the main body, the patent eliminates the humidity sensitivity of paper while maintaining the ability to use paper or fabric for the surface material layer. This composite structure provides durability in humid environments without significantly complicating the manufacturing process.
3Strength
If rigid plastic main body with integrated waist core is used, then structural integrity is enhanced, but manufacturing process becomes more complex
Solution Approach 1:
The patent merges the waist core and main body into a single integrated component through injection molding. The waist core is enveloped and bonded to the main body in one manufacturing step, creating a unified structure with enhanced structural integrity while avoiding the need for separate assembly operations.
Solution Approach 2:
The locating holes are pre-formed in the rigid plastic main body before the final bonding step. This preliminary positioning ensures precise alignment of the waist core with the main body during injection molding, simplifying the overall manufacturing process while maintaining high structural integrity.
4Manufacturing precision
If locating holes are arranged in waist core region, then processing accuracy is enhanced, but manufacturing complexity increases
Solution Approach 1:
The locating holes are designed and formed in advance during the mold preparation stage. These pre-formed holes provide reference positions for the waist core, ensuring accurate positioning and alignment during the injection molding process without requiring complex real-time adjustment mechanisms.
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 provides a durable, comfortable, and artistic insole that resists deformation under pressure and maintains performance in humid conditions, with improved bonding strength and extended lifespan.
Implementation Method 1
The main body of the half fork disclosed by the present invention is made of rigid plastic... the half fork is so characterized in a much solider structure... will not deform easily under the pressure caused by the weight of the wearer
Implementation Method 2
the waist core is integrated with the main body as a whole through the process of plastic injection molding for forming the main body
Data Source
AI summary
The present invention discloses a half fork for shoe molded insole, comprising a rigid plastic injection-molded main body, and a waist core integrated in the main body as a whole by plastic injection molding, wherein the main body has at least one locating hole on the upper and/or lower surfaces thereof in the waist core region, and bevels on the edges thereof. The half fork further comprises a surface material layer on upper and/or lower surfaces of the main body; the material of the surface material layer is fabric, paper or plastic. The half fork disclosed by the present invention will not deform easily under the pressure caused by the weight of the wearer, even in the humid environment or under the condition of being soaked, it is more comfortable, durable and artistic.