Circular Loom Orbit Recesses for Uniform Warp Thread Tension
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Solution Overview
Problem
Existing circular weaving machines face design complexity and mechanical challenges in maintaining uniform thread tension during the movement of warp bobbins, leading to thread wear, vibration, and limited speed, making them unsuitable for delicate fibers like carbon fibers.
Innovation Solution
A circular weaving machine design with movable warp bobbin devices and a guiding device that moves warp threads through narrow recesses of the orbit, maintaining thread tension and reducing deflections, allowing for high-speed weaving of sensitive fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the warp bobbin devices are moved through the weaving plane to enable weaving, then the fabric production capability is improved, but the design complexity and mechanical control requirements increase significantly
Solution Approach 1:
A guide device with thread guide elements acts as an intermediary between the warp bobbins and the weaving plane. The guide device directs warp threads through narrow recesses in the orbit, mediating the interaction between moving bobbins and the weaving process, thereby simplifying the mechanical design while maintaining production capability
Solution Approach 2:
The system is segmented into distinct functional components: stationary warp bobbins, movable guide devices with thread guide elements, and the orbit with recesses. This segmentation allows each component to perform its specific function independently, reducing overall system complexity while enabling fabric production
2Productivity
If the warp bobbins are moved rapidly for high-speed weaving, then the productivity increases, but the thread tension uniformity deteriorates
Solution Approach 1:
The patent replaces complex mechanical tensioning mechanisms with a geometric solution: narrow recesses in the orbit that guide threads through fixed paths. This substitution eliminates the need for active mechanical control of thread tension during rapid bobbin movement, maintaining tension uniformity while enabling high-speed weaving
Solution Approach 2:
The guide device and orbit recesses work together to automatically maintain thread tension through their geometric configuration. The system self-regulates thread tension during rapid movement without requiring external control mechanisms, enabling high-speed operation with uniform tension
3Adaptability or versatility
If thread guide tubes are pivoted to guide warp threads at different angles, then the weaving flexibility is improved, but the thread wear increases significantly
Solution Approach 1:
The invention extracts the pivoting function from the thread guidance system. Instead of pivoting thread guide tubes, the patent uses stationary guide elements with narrow recesses that direct threads at appropriate angles without mechanical movement, eliminating friction-induced thread wear while maintaining weaving flexibility
Solution Approach 2:
Mechanical pivoting of thread guides is replaced with a fixed geometric guidance system using narrow recesses in the orbit. This substitution eliminates contact friction between moving guide parts and threads, preventing thread wear while achieving the necessary thread direction changes for flexible weaving
4Ease of operation
If large slots are provided for thread guide tube passage, then the thread guide movement is facilitated, but the shuttle rotation homogeneity deteriorates
Solution Approach 1:
Instead of providing large physical slots, the patent creates narrow recesses that barely accommodate the thread passage. This copying of the minimal necessary passage space eliminates the disruptive effect of large openings on shuttle rotation while still facilitating smooth thread guide movement through the orbit
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a circular weaving machine for weaving a core with at least one shuttle (19) which has a weft thread spool (21) and is movable along a circular path (3) around the core (1). It is proposed that at least one guide device (11), designed to guide at least one warp thread (15) provided by a warp thread spool (10) of a warp spool device (9), is provided, which is movably arranged or designed outside a web plane (8) enclosed by the outer circumference of the circular path (3), wherein the guided warp thread (15), crossing the web plane (8), passes through a recess (18) of the circular path (3).