Selvage Gripping Device for High-Speed Loom Weaving Stability
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Solution Overview
Problem
Conventional methods for suppressing warp yarn looseness in the selvage portion of high-density woven fabrics require complex control and increase manufacturing costs, leading to inefficiencies and poor product quality.
Innovation Solution
A selvage portion gripping device is mounted on the loom, featuring a space for the selvage portion to pass through and a tiny space for the weft yarn, with an elastic part, such as a plate spring, to maintain the woven condition of the selvage portion even when the weft yarn is cut, preventing crimp and looseness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (air jet loom, water jet loom with grip rollers) are used to suppress warp yarn looseness, then weaving stability is improved, but device complexity and manufacturing cost increase due to complicated control requirements
Solution Approach 1:
The invention extracts the selvage portion from the main woven fabric structure and treats it separately. By providing a dedicated gripping device only for the selvage portion rather than controlling the entire fabric, the system achieves reliable suppression of warp yarn looseness while reducing overall control complexity. The gripping device is positioned at the selvage portion where additional yarns are inserted, isolating the control function to a specific region.
Solution Approach 2:
The invention segments the fabric structure into main body and selvage portion, applying different treatment methods to each. The selvage portion receives specialized gripping control with additional yarns, while the main fabric follows conventional weaving. This segmentation allows simplified control architecture focused only on the critical selvage region.
2Reliability
If additional yarns and complex gripping mechanisms are used, then suppression of cloth fell retreat is improved, but manufacturing cost increases
Solution Approach 1:
The invention applies preliminary action by inserting additional yarns into the selvage portion before the main weaving process. These pre-positioned yarns create a structure that naturally resists cloth fell retreat. The gripping device then simply maintains this pre-established structure rather than actively combating retreat forces, reducing the complexity and cost of the gripping mechanism itself.
Solution Approach 2:
The additional yarns act as intermediaries between the gripping device and the main fabric structure. They provide a dedicated element that the gripping device can hold onto, transferring the gripping force effectively to suppress cloth fell retreat without requiring complex direct gripping mechanisms on the main fabric.
3Strength
If high-density weaving is performed, then fabric strength is improved, but warp yarn looseness in selvage portion increases due to larger cloth fell movement
Solution Approach 1:
The invention applies local quality by providing different structural characteristics to the selvage portion compared to the main fabric. Additional yarns are inserted only in the selvage portion, creating a locally reinforced structure with different mechanical properties. This local enhancement specifically addresses the warp yarn looseness problem in the selvage region without affecting the overall high-density structure of the main fabric.
Solution Approach 2:
The additional yarns are preliminarily positioned in the selvage portion to create a pre-reinforced structure that resists the loosening forces generated during high-density weaving. This preliminary structural preparation allows the fabric to maintain both high density and selvage uniformity.
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
The device effectively suppresses warp yarn looseness and crimp, ensuring a stable woven condition, reducing manufacturing costs and improving product quality by maintaining tension and preventing cloth fell retreat at the selvage portion.
Implementation Method 1
an elastic part, such as a plate spring, to maintain the woven condition of the selvage portion
Data Source
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AI summary
An object of the present invention is to provide a device capable of reducing occurrence of cloth fell retreat at a selvage portion of a woven fabric and warp yarn looseness in a base cloth selvage portion when a high-density woven fabric is woven at a high speed, and a method for manufacturing the woven fabric. The present invention is: a selvage portion gripping device for a loom, having a space where a selvage portion can pass in which the selvage portion formed by weaving additional yarns and weft yarns can pass through in a woven fabric forwarding direction, a tiny space where the weft yarn can move in which the weft yarn can move in the woven fabric forwarding direction, and a means for maintaining a woven condition of the selvage portion even when the weft yarn is cut with a weft yarn cutter; and a method for weaving using a loom equipped with the device.