Tiltable Reed Jacquard Loom for Non-90° Weft Weaving
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Solution Overview
Problem
Existing Jacquard looms are limited to weaving weft yarns at a 90° angle relative to the horizontal direction, which restricts the ability to pre-position wefts and define specific mechanical properties in the final fibrous structure.
Innovation Solution
A Jacquard loom with a reed comprising at least two stationary portions forming an angle, mounted on a positioning mechanism for angular adjustment, and vertical translation means to adjust the beat-up angle and position of the reed, allowing weft yarns to be woven at angles other than 90° relative to the horizontal plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the reed is fixed in a standard position perpendicular to the horizontal direction, then the weaving process is simple and reliable, but the weft yarns can only be oriented at 90° relative to the horizontal direction, limiting the ability to pre-position wefts and define specific mechanical properties
Solution Approach 1:
The reed is made adjustable in angular position through a positioning mechanism that allows rotation about a vertical axis. This enables the reed to be oriented at different angles relative to the horizontal direction, allowing weft yarns to be woven at angles other than 90°. The dynamic adjustability transforms a static fixed reed into a versatile component that can adapt to different weaving requirements for pre-positioning wefts and defining specific mechanical properties in the final fibrous structure
Solution Approach 2:
The reed is divided into at least two stationary portions forming an angle therebetween. This segmentation allows different portions of the reed to function independently, with each portion able to engage with weft yarns at different angles. The angular separation between portions enables selective positioning of weft columns at different orientations within the same fibrous structure
2Manufacturing precision
If the reed is made tiltable with angular adjustment capability, then weft yarns can be positioned at various angles to enhance mechanical properties, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The positioning mechanism incorporates angular adjustment capability that allows the reed to be tilted to precise angles. This dynamic positioning system enables accurate angular placement of weft yarns during the weaving process, achieving the desired manufacturing precision for weft column orientation while maintaining a relatively simple mechanical implementation through rotation about a vertical axis
Solution Approach 2:
The positioning mechanism serves multiple functions: it enables angular adjustment of the reed, allows vertical translation of the reed or fell, and facilitates both pre-positioning of wefts and definition of specific mechanical properties. This multi-functionality reduces the need for separate mechanisms, simplifying overall manufacturing while achieving precise angular positioning
3Adaptability or versatility
If vertical translation means are added to move the reed or fell vertically, then the flexibility in shaping the fibrous structure is enhanced, but the device complexity increases
Solution Approach 1:
The vertical translation means are integrated with the existing reed positioning system to create a multi-functional mechanism. This single mechanism enables both vertical translation of the reed or fell and angular adjustment of the reed, reducing overall device complexity while enhancing the shaping capability of the fibrous structure. The coordinated operation of vertical translation and angular positioning allows for complex three-dimensional fiber architectures
Data Source
AI summary
A Jacquard type loom intended to produce a fibrous structure by three-dimensional weaving between a plurality of warp yarns and a plurality of weft yarns extending in a horizontal direction, the loom including a reed movable between a rest position upstream of the rapier and a beat-up position of a fell of the fibrous structure in a beat-up direction parallel to the horizontal direction. The reed includes at least two stationary portions forming an angle therebetween. The reed is mounted on the loom by means of a positioning mechanism able to orient the reed about an axis of rotation so as to adjust an angular position of the stationary portions of the reed relative to a horizontal reference plane. The loom comprises vertical translation means able to move the reed or the fell of the fibrous structure in the vertical direction.