Multi-layer circular woven fabric with decoupled warp threads
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Solution Overview
Problem
Existing circular weaving technologies cannot produce a circular fabric that is multi-layered in partial areas of the cross-section, as they lack the capability to decouple and independently position warp threads relative to the weft thread or weaving shuttle.
Innovation Solution
The method involves guiding a weft thread in circuits around a longitudinal axis of the circular fabric, with warp threads that can be moved between a first position for engagement with the weft thread and a second position for mechanical decoupling, allowing for the creation of multi-layered sections by engaging and passing warp threads at specific positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional circular weaving technology is used, then the weaving process is simple, but the fabric cannot be multi-layered in partial areas of the cross-section
Solution Approach 1:
The fabric structure is segmented into multiple layers within the cross-section, with different sections (first section and second section) having different layer configurations. This allows partial multi-layered structures to be created by selectively positioning warp threads in different sections, enabling regional variation in fabric thickness and structure without requiring completely different weaving processes.
Solution Approach 2:
The weaving device incorporates movable warp threads that can dynamically change position between a first position (for engagement with weft thread) and a second position (for mechanical decoupling). This dynamic positioning capability allows the same weaving process to produce both single-layer and multi-layer sections by adjusting warp thread positions during different phases of the weaving cycle, providing adaptability without permanent structural complexity.
2Manufacturing precision
If warp threads are mechanically decoupled and independently positioned, then partial multi-layered sections can be produced, but the device complexity increases
Solution Approach 1:
The weaving device employs movable warp threads that can be independently positioned between engaged and decoupled states during the weaving process. This dynamic control allows precise positioning of warp threads to create multi-layered sections with high manufacturing precision, while the movement is integrated into the existing circular weaving mechanism rather than requiring separate complex positioning systems.
Solution Approach 2:
The warp threads are pre-configured to be movable between defined positions, allowing them to be brought into engagement with the weft thread at specific times and locations. This preliminary preparation of movable warp threads enables precise layer positioning to be achieved through controlled movement rather than complex real-time adjustment mechanisms, reducing overall device complexity while maintaining manufacturing precision.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method for producing a multi-layered circular fabric (1, 1') comprising at least one weft thread (2, 2') and several warp threads (10-18) in a partial region of the cross-section, wherein the weft thread (2) is guided in rounds around a longitudinal axis (7) of the circular fabric (1, 1'), which warp threads (11-18) are movable between a first position and a second position decoupled from a movement of the weft thread (2, 2'), in which first position the warp thread (11-18) can be brought into engagement with the weft thread (2, 2') and in which second position the weft thread (2, 2') is guided past the warp thread (11-18), wherein a number of first warp threads (11, 13, 15, 17) of a first layer (8) and a number of second warp threads (12, 14, 16, 18) of a second layer (9) are assigned, with the weft thread (2, 2') being joined to the first warp threads (11, 13, 15) at the first round (3).17) can be brought into engagement in a first position and is passed by second warp threads (12, 14, 16, 18) in a second position and the weft thread (2, 2') is passed by first warp threads (11, 13, 15, 17) in a second position during the second rounding (4) and is brought into engagement with second warp threads (12, 14, 16, 18) in a first position.