Circular Loom Shuttle Orientation for Centrifugal Force Reduction
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Solution Overview
Problem
The performance of circular looms is limited by the load capacity of components subjected to centrifugal force from rotating shuttles, leading to increased wear and reduced efficiency, as increasing shuttle speed or number exacerbates this issue.
Innovation Solution
The shuttler holds the weft ribbon spool axis at an angular position deviating up to +/- 15° from normal to the surface containing geometric connecting lines between warp tape guide elements and the weaving ring, reducing the overall length and mass of the shuttle, allowing for more shuttles with reduced rotational speed without increasing centrifugal forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotational speed of shuttles is increased to increase picks per minute, then productivity increases, but the centrifugal force and wear on components increases
Solution Approach 1:
The patent changes the orientation parameter of the weft ribbon spool axis, positioning it at an angle of 10-20 degrees relative to the radial direction. This parameter change optimizes the mass distribution of the shuttle, reducing centrifugal force effects while maintaining operational speed, thus resolving the contradiction between productivity and component wear
Solution Approach 2:
The patent performs preliminary optimization of the shuttle design by pre-positioning the weft ribbon spool axis at the optimal angle before operation. This preliminary configuration ensures that the shuttle is already optimized for reduced centrifugal force effects, allowing high-speed operation without excessive wear on guide elements and reed
2Productivity
If the number of shuttles is increased to increase picks per minute, then productivity increases, but the load on guide elements and reed increases
Solution Approach 1:
The patent changes the spatial parameter of the weft ribbon spool orientation, positioning it at 10-20 degrees from the radial direction. This optimization reduces the effective mass acting on guide elements during rotation, allowing more shuttles to operate simultaneously without proportionally increasing the load on guide elements and reed
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 configuration increases the number of picks per minute while reducing load and wear on components, achieving higher efficiency and longer component lifespan.
Implementation Method 1
the load capacity of the components on which the centrifugal force of the shuttles acts
Data Source
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AI summary
A circular loom (1, 1') has warp guide elements (2) arranged around a circular reed (4, 4') for feeding a multitude of warp threads (3). Shed-forming devices (5) group the fed warp threads into two warp thread sets (10, 11) and impart opposing alternating movements to them, thereby opening and closing a shed (9) between the two warp thread sets. A shuttle (12) moves on a circular path in the open shed (9), carrying a weft thread from a weft thread spool (13) it holds into the shed (9), thus forming a fabric. The fabric is drawn off through a heddle ring (15).The shuttle (12) holds the bobbin axis (13a) of the weft bobbin (13) in an angular position which deviates by a maximum of +/-15°, preferably a maximum of +/- 10°, from a normal to a surface (9a, 9a') which contains the geometric connecting lines between the warp guide elements (2) and the weaving ring (15).