Joining Loop Structure for Industrial Multilayer Fabric
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Solution Overview
Problem
Existing joining methods for industrial multilayer fabrics, such as airlaid fabrics, often result in exposure of the lower side warp from the surface, compromising the antifouling properties of the upper side fabric and requiring complex machinery for assembly, especially when forming endless or disjoined fabrics.
Innovation Solution
A joining loop structure where end portions of warps are folded back and interwoven to form common holes for a core wire, with surplus upper side wefts left to cover the loop formation portion, preventing exposure of the lower side fabric and enhancing joining strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If loops are formed at both ends of industrial fabric by using warp itself and joining with core wire, then endless or disjoined fabric can be made freely, but lower side warp is exposed from surface compromising antifouling properties
Solution Approach 1:
The joining loop structure embeds the lower side warp within the upper side fabric layers. The upper side warp and weft are folded back to enclose the lower side warp, creating a nested configuration where the lower side warp is hidden inside the fabric structure rather than exposed on the surface, thus preserving the antifouling properties of the upper side fabric while maintaining the joining function.
Solution Approach 2:
The invention transitions from a two-dimensional surface joining method to a three-dimensional enclosed structure. By folding back the upper side warp and weft to create loops that enclose the lower side warp, the joining structure extends into the third dimension, creating a tunnel-like configuration that hides the lower side warp from surface view while maintaining structural integrity.
2Strength
If cantilever system is employed for joining industrial fabric, then joining strength is improved, but machine manufacturing cost increases and device size increases
Solution Approach 1:
The fabric itself serves as the joining structure through its own warp and weft elements being folded back to form loops. The upper side warp and weft at the end portions are utilized to create the joining loops that enclose the lower side warp, eliminating the need for external joining mechanisms or complex machine structures. The fabric's self-structure provides the joining function, reducing device complexity and manufacturing costs.
3Adaptability or versatility
If spiral loop or metal hook is attached at end portion, then endless fabric can be formed, but structure of joining portion becomes completely different from normal portion and loop protrudes from end portion
Solution Approach 1:
The joining structure uses the same fabric materials (upper side warp, lower side warp, and weft) as the normal fabric portions, ensuring local quality consistency. The upper side warp and weft at the end portions are folded back to form loops that match the fabric's existing structure, creating a seamless transition. This eliminates the need for different materials or structures at the joining portions, maintaining uniformity throughout the fabric while enabling endless configuration.
Data Source
AI summary
A multilayer fabric is joined by engaging joining loops formed at both ends of a disjoined industrial multilayer fabric having wefts and warps in layers. The joining loops are formed by folding back some or all the end portions of warps. The both ends of the fabric are joined by engaging the loops to form a common hole and inserting a core wire into the common hole. At least one upper side weft remains while a lower side weft below the remaining upper side weft is removed at the both ends of the fabric. The common hole and the core wire inserted therein are located below the remaining upper side weft. The folded portions of the warps are interwoven with wefts of a normal portion of the fabric.