Triaxial Loom Static Shedding Device
Solution Overview
Problem
Existing automatic loom systems for producing triaxial fabrics are complex and bulky, requiring precise movements and complex machinery for interlacing yarns, which limits the visual and tactile effects and mechanical properties of the fabric, and do not effectively block yarns, leading to variability in glue and powder usage.
Innovation Solution
The use of an oblique weaving front and a combined warp yarn guide and oblique fixed weft feeding system reduces system complexity and size, allowing for the production of triaxial fabrics with improved mechanical properties by guiding warp yarns and inserting oblique weft yarns between them, using motor-driven cylinders and side tracks to manage tension and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional weaving machines with multiple heddles and auxiliary handling elements are used to produce triaxial fabrics, then the interlacing of yarns can be achieved, but the machine becomes extremely complex and bulky
Solution Approach 1:
The patent extracts and eliminates the complex auxiliary handling elements and multiple heddles from traditional weaving machines. By using a single heddle per warp yarn and a simplified weft insertion mechanism, the invention removes unnecessary components while maintaining the triaxial fabric production capability, thereby reducing machine complexity and bulk
Solution Approach 2:
Instead of using multiple heddles to control warp yarns and complex mechanisms for weft insertion, the patent inverts the approach by using a single heddle per warp yarn and a simplified weft insertion system that moves the complexity from the warp control mechanism to the weft feeding system, resulting in an overall simpler machine structure
2Manufacturing precision
If traditional weaving machines with precise movement mechanisms are used, then yarn interlacing can be achieved, but the machine dimensions become very large to produce fabric of reasonable width
Solution Approach 1:
The patent segments the weaving function into independent modular units: individual heddles for each warp yarn, separate weft insertion points, and distributed tensioning elements. This segmentation allows the machine to maintain precise control over yarn interlacing while reducing the overall machine footprint, as each module operates independently without requiring large auxiliary mechanisms
Solution Approach 2:
The patent introduces an oblique dimension for weft yarn insertion at approximately 60 degrees to the warp yarns, creating a triaxial fabric structure. This dimensional change allows the machine to produce complex triaxial fabrics without requiring multiple perpendicular weaving mechanisms, thereby reducing the machine's horizontal and vertical dimensions while maintaining manufacturing precision
3Device complexity
If bidimensional fabric with orthogonal weft and warp is produced, then simple interlacing is achieved, but visual and tactile effects and mechanical properties are limited
Solution Approach 1:
The patent creates a composite triaxial fabric structure by interlacing warp yarns with two different series of weft yarns at oblique angles (approximately 60 degrees). This composite structure combines the strength and stability benefits of multiple yarn directions, resulting in fabric with enhanced mechanical properties, visual and tactile effects, and uniform resistance to shearing stress and tearing, while using a relatively simple weaving mechanism
Data Source
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AI summary
A loom for triaxial fabric comprising an assembly (2) for feeding warp yarns (21), parallel to an X direction and on two surfaces; an assembly (3) for moving forward the warp yarns (21) in said X direction; an assembly (4) for inserting an oblique fixed weft yarn (41) along an Y direction that is oblique to said X direction; an assembly (5) for inserting an inserted oblique weft yarn (51) along a weaving front F oblique to the X and the Y direction; a plurality of guide elements (7) for the warp yarns (21), whose yarn input ends are aligned along the edges of the two surfaces of the warp yarns, whereas the yarn output ends are aligned parallel to said weaving front F and downstream of the latter; said guide elements (7) are static and shaped in such a way as to present a convex profile on the part facing the weaving front F, said guide elements (7) being mounted in such a way that said convex profile faces upwards or downwards, so that the yarn guide lowers or rises the warp yarn (21) moving on the outer part of said profile respectively, by also displacing the oblique fixed weft already located between the two surfaces of the warp yarns and forming a gap through which the inserted oblique weft yarn (51) is inserted, so that said yarn (51) crosses both the warp yarns and those of the oblique fixed weft to form a triaxial fabric.