Textile Stitch Patterning for Local Stiffness Control
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Solution Overview
Problem
Existing textile manufacturing methods lack precision in modifying mechanical properties, relying on coarse-scale assembly and limited control over material properties, which restricts the production of knit fabric artifacts with multiple distinct properties.
Innovation Solution
Computer-controlled embroidery stitching that re-purposes existing machinery to create purposeful, precision changes in fabric properties by devising stitch patterns using domain-specific constraints and algorithms like the travelling salesman problem and Dijkstra's algorithm, allowing for controlled stiffness and stretch direction across a single textile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional assembly (seaming or layering) methods are used to produce knit fabric artifacts with multiple distinct properties, then the production process is simple, but the manufacturing precision and control over material properties are coarse and limited
Solution Approach 1:
The invention segments the fabric into discrete regions with different mechanical properties by selectively placing stitches in specific patterns. Each region can have tailored stitch density, direction, and type to achieve distinct material properties without requiring physical assembly of separate fabric pieces. This segmentation is achieved through computer-controlled embroidery machines that can place stitches with fine-grain accuracy at specified locations.
Solution Approach 2:
The invention applies local quality by varying stitch characteristics (density, direction, length, type) at different locations across the fabric to create spatially varying mechanical properties. Areas requiring higher stiffness receive denser or differently oriented stitching, while areas requiring flexibility maintain lower stitch density. This allows each local region to have optimized properties tailored to its functional requirements.
2Manufacturing precision
If computer-controlled embroidery stitching is used to make precision changes to fabric properties, then the control over stiffness and stretch direction is fine-grain accurate, but the production time and processing complexity increase
Solution Approach 1:
The invention performs preliminary action by using computational algorithms to pre-plan the optimal stitch paths, densities, and patterns before manufacturing. The system calculates the required stitch distribution to achieve target mechanical properties, generating a complete stitching map that guides the embroidery machine. This pre-computation optimizes the subsequent manufacturing process by eliminating trial-and-error adjustments during production.
Solution Approach 2:
The invention utilizes parameter changes by systematically varying multiple stitch parameters (density, length, direction, type, spacing) to achieve the desired mechanical properties. The system adjusts these parameters dynamically across different fabric regions based on computational design, allowing continuous variation of material properties without changing the base fabric or requiring multiple assembly steps.
3Ease of manufacture
If existing embroidery machinery is re-purposed for stiffness control, then the manufacturing cost is reduced, but the machine must perform a new function beyond traditional embroidery
Solution Approach 1:
The invention applies universality by enabling existing embroidery machines to perform multiple functions: traditional decorative embroidery and new structural stiffness control. The same machine hardware and stitching mechanism are used for both aesthetic patterning and mechanical property modification. This multi-functionality reduces manufacturing costs by eliminating the need for specialized equipment while expanding the capabilities of conventional machinery.
Data Source
AI summary
This system is directed to a computerized system for development of textiles with modified physical properties through stitching and can include a set of non-transitory computer readable instructions configured for: receiving a design pattern representing desired physical properties of a textile having a higher stiffness area and a lower stiffness area; developing a contiguous stitching pattern constrained by a pattern perimeter boundary and having a continuous stitching path, developing a first stiffness area within the contiguous stitching pattern having a first area of density, developing a second stiffness area within the contiguous stitching pattern having a second area of density wherein the first area of density has more stitch density than the second area of density, and transmitting the contiguous stitching pattern to an embroidery machine configured to provide a textile having the contiguous stitching pattern incorporating into the textile.