Nested Flat Pattern Uppers for Continuous Automated Shoe Production
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Solution Overview
Problem
The traditional footwear manufacturing process is laborious and inefficient due to its batch-like nature, involving multiple operators and operations, leading to inefficiencies.
Innovation Solution
A continuous in-line manufacturing system for shoe uppers using a flat pattern that allows for automated production of shoe uppers with varied styles, sizes, and materials, utilizing a substrate with minimal stretch and positional identifiers to guide manufacturing processes, and enabling efficient material use and waste reduction through nesting techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional batch-like manufacturing process is used with multiple operators performing series of operations, then flexibility in performing different operations is maintained, but manufacturing efficiency and productivity are reduced due to start and stop processes
Solution Approach 1:
The patent implements a continuous in-line manufacturing system where the flat pattern upper moves continuously through multiple processing stations (cutting, stitching, assembly) without stopping. This eliminates the batch-like start-stop process of traditional manufacturing, allowing operations to be performed continuously on different portions of the upper simultaneously, thereby significantly improving manufacturing efficiency and productivity while enabling automated production.
2Loss of substance
If individual pieces are cut and sewn together to form footwear upper, then customization and design flexibility are achieved, but material waste and loss of substance increase
Solution Approach 1:
The patent employs nesting techniques where multiple shoe upper patterns are arranged and nested together on a single large substrate sheet in optimized configurations. This allows maximum utilization of the substrate material by fitting multiple uppers into the available space, minimizing unused material and reducing waste while maintaining the ability to produce customized designs through digital pattern arrangement.
Solution Approach 2:
The patent performs preliminary planning and optimization of pattern layout before the actual cutting process. Computer-aided design software arranges nested patterns on the substrate to minimize waste, and all cutting paths are pre-programmed. This preliminary action ensures optimal material utilization before manufacturing begins, reducing material waste while maintaining manufacturing simplicity through automated execution.
3Loss of time
If traditional manufacturing operations are performed by different operators at different times, then operational flexibility is maintained, but manufacturing time and loss of time increase
Solution Approach 1:
The patent merges multiple separate manufacturing operations (cutting, stitching, assembly) into a single integrated continuous in-line system. Different processing stations are combined along one production line, allowing multiple operations to be performed simultaneously on different portions of the upper as it moves through the system. This eliminates the sequential time loss of traditional multi-operator processes while managing system complexity through modular station design.
Solution Approach 2:
The patent segments the continuous manufacturing process into distinct processing stations (cutting station, stitching station, assembly station), each performing specific operations. This segmentation allows parallel processing where different stations work simultaneously on different portions of the upper, reducing total manufacturing cycle time while keeping each individual station relatively simple and manageable.
4Manufacturing precision
If conventional footwear manufacturing processes are used, then traditional construction methods are maintained, but manufacturing consistency and precision decrease due to manual operations
Solution Approach 1:
The patent replaces manual mechanical operations with automated machinery. Computer-controlled cutting devices precisely cut patterns, automated stitching machines create consistent seams, and robotic assembly systems perform repetitive tasks with uniform precision. This substitution of manual mechanical systems with automated ones ensures consistent construction quality and manufacturing precision across all produced uppers.
Solution Approach 2:
The patent utilizes digital parameters and computer-controlled settings to maintain precise manufacturing consistency. All cutting paths, stitching patterns, and assembly parameters are digitally defined and automatically reproduced for each upper produced. This digital parameter control ensures that every upper is manufactured with identical precision and consistency, eliminating variations inherent in manual operations.
Data Source
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AI summary
An article of footwear flat pattern upper having an upper portion and a footbed portion is provided. The upper portion and the footbed portion are integrally coextensive, such that the upper portion lateral side converges with the footbed lateral side. The flat pattern includes nested same-sided article of footwear with a reduced surplus portion there between. The articles of footwear includes the following coextensive portions: the first medial side with a toe end, the toe end with a lateral side, the lateral side with a heel end, and the heel end with the second medial side. The first medial side and the second medial side are joined to form dimensional article of footwear.