Mixing Device for Shoe Sole Molding Material
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Solution Overview
Problem
Conventional mixing devices for shoe sole molding materials are unable to effectively incorporate additional lightweight materials, resulting in shoe soles that are too heavy for customer expectations.
Innovation Solution
A mixing device that includes a base with multiple inlets for a first and second material, and a side tube for elastic fillers, featuring primary and secondary extruder screws to mix and extrude a lightweight molding material, along with a heat dissipating unit to manage reaction heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional mixing device with two inlets is used to mix first and second fundamental materials, then polyurethane molding material is formed, but the shoe soles are too heavy for customer expectations
Solution Approach 1:
The mixing device is segmented into multiple independent inlet systems: a first inlet for the first fundamental material, a second inlet for the second fundamental material, and a third inlet via side tube for elastic fillers. This segmentation allows each material to be introduced separately and mixed in controlled proportions, enabling the incorporation of lightweight elastic fillers while maintaining the structural integrity of the molding device
Solution Approach 2:
The mixing device is designed with multi-functionality to handle both the original two fundamental materials and the additional elastic fillers. The base structure with multiple inlets and the extruder screw system can accommodate different material types and quantities, making the device universal for producing various formulations of lightweight molding materials
2Weight of moving object
If additional elastic fillers are added to reduce weight, then lightweight molding material can be formed, but the conventional mixing device cannot meet the structural requirements
Solution Approach 1:
The side tube is nested within or connected to the base structure of the mixing device, with the third inlet integrated into the overall architecture. The extruder screw is positioned within the base to mix all materials in the accommodating space. This nesting approach adds the capability to handle elastic fillers without creating a completely separate complex system
Solution Approach 2:
The side tube is arranged in a different spatial dimension or orientation relative to the main body of the mixing device, allowing the elastic fillers to be introduced from a different direction. This dimensional arrangement enables the incorporation of additional materials without interfering with the existing two-inlet system for the fundamental materials
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 device successfully forms a lightweight molding material for shoe soles by integrating elastic fillers with the reaction product of the first and second materials, addressing the heaviness issue and meeting customer demands for portability.
Implementation Method 1
The primary extruder screw is operable for mixing the elastic fillers and a reaction product, which is made by reacting the first material and the second material
Implementation Method 2
extruding the molding material out of the accommodating space via the outlet
Implementation Method 3
The secondary extruder screw extends through the side tube, is rotatable about a second axis that is transverse to the first axis, and is adapted for conveying the elastic fillers into the accommodating space
Data Source
AI summary
A mixing device includes a base, a side tube and a primary extruder screw. The base includes an upper case body and a lower case body cooperating with each other to define an accommodating space. The upper case body has a first inlet and a second inlet communicating with the accommodating space and adapted respectively for passage of two materials into the accommodating space therethrough. The lower case body has a third inlet communicating with the accommodating space. The side tube cooperates with the third inlet to be adapted for passage of elastic fillers into the accommodating space therethrough. The primary extruder screw is operable for mixing the elastic fillers with a reaction product made by the two materials to form a molding material.