Tape-Weaving Apparatus for Curved Textile Conformity
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Solution Overview
Problem
Conventional weaving methods using yarns are inadequate for producing fabrics with tape-like warps and wefts, as they fail to handle tape widths greater than 16 mm, cannot feed warps positively in a tensionless condition, and do not allow for variable lengths or different widths of wefts, leading to issues like crumples, stretches, and uneven fibre distribution when curved, and lack the ability to produce fabrics with oblique or slant wefts and shaped edges.
Innovation Solution
A novel method employing partially stabilized fibrous tapes, which are fed positively in a tensionless condition, allowing for the production of woven materials with non-linear fibre arrangements, doubled warps and wefts that can slide relative to each other, and the ability to incorporate oblique or slant wefts and shaped edges, using a vertical format and specialized devices for warp and weft feeding, inserting, and depositing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional weaving methods using yarns are used, then the weaving process is simple and well-established, but the method cannot handle tape widths greater than 16 mm and cannot feed warps positively in a tensionless condition
Solution Approach 1:
The invention divides the weaving apparatus into specialized modules: a positive feed mechanism for tensionless warp feeding, a shedding device for tape manipulation, and a take-up mechanism. This segmentation allows each component to be optimized for handling wide tapes without requiring complete system redesign.
Solution Approach 2:
The invention introduces intermediate devices such as guide rollers and tensioning elements that mediate between the warp supply and the weaving zone, enabling positive feeding of wide tapes in a tensionless state through controlled guidance and support.
2Adaptability or versatility
If conventional weaving methods are used, then the process is straightforward, but the method cannot accommodate variable lengths or different widths of wefts, leading to crumples and stretches
Solution Approach 1:
The invention employs dynamic weft feeding mechanisms that can adjust to variable weft lengths and widths in real-time. The apparatus includes adjustable guides and positive feed systems that adapt to different weft specifications while maintaining fabric uniformity and preventing defects.
Solution Approach 2:
The weaving apparatus allows for parameter changes in weft dimensions (length, width, thickness) while maintaining control through adjustable feeding mechanisms and shedding devices that accommodate these variations without compromising fabric quality.
3Stability of the object's composition
If conventional weaving methods are used, then the structure is simple, but the method produces uneven fibre distribution and orientation when fabrics are curved
Solution Approach 1:
The invention implements preliminary stabilization of the fibrous tape structure through controlled feeding and tensioning before the weaving process. This preliminary action ensures uniform fibre distribution and orientation is established early, preventing defects during subsequent curvature operations.
4Adaptability or versatility
If conventional weaving methods are used, then the process is efficient, but the method cannot produce fabrics with oblique or slant wefts and shaped edges
Solution Approach 1:
The invention uses periodic shedding device movements to create oblique and slant weft patterns. By varying the shedding sequence and timing, the apparatus can produce complex geometric patterns including shaped edges while maintaining efficient weaving speeds through rhythmic, programmed operations.
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
This method enables the production of fabrics that conform to curved shapes without crumples or stretches, with improved fibre distribution and orientation, and allows for the creation of fabrics with variable weight per unit area and complex cross-sectional profiles, enhancing the performance and handling of woven materials.
Implementation Method 1
By using elastomeric binding agent there are the advantages of expanding or shrinking (for example by heating) the width of the fibrous tape
Data Source
AI summary
Novel woven materials, producible by a new weaving method, are described that comprise single or doubled warps and wefts in the form of tapes that are preferably partially stabilized type of fibrous tape. These fibres are caused to occur in a non-linear arrangement during the weaving process. The non-linear fibres can be subsequently straightened by pulling the tape longitudinally. The doubled warps and wefts comprise disconnected tapes. Such separateness of constituent tapes of doubled warp and weft tapes enables them to be slid/slipped relative to each other by pulling longitudinally and laterally without causing any alteration in the woven structure. These novel fabrics solve the problem of uneven fibre distribution and orientation arising from crumples/wrinkles due to compression and stretches due to extension, at the inner and outer sides respectively, when tape-woven fabrics are curved into shapes. Further, by using doubled warps and wefts fabrics with relatively flat/planar sections and thicker/raised wide rib sections can be also created that resemble a bit like a profiled material in its cross-section. Other fabrics like those comprising slant/oblique weft tapes, shaped warp and weft tapes, formed shape within its body are also producible.