Weaving Machine Web Drawing-Off Sag Prevention
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Solution Overview
Problem
Existing apparatuses for drawing-off web-shaped products from weaving machines often result in sagging of thick, multi-layered products, leading to deformation and quality loss due to self-weight, especially when these products are too thick to be wound or wrapped on traditional rollers.
Innovation Solution
An apparatus with a clamp carrier system and a support system using tension cables or stiff-backed chains that move in synchronization with the clamp carriers to maintain the web-shaped product in a planar position, preventing sagging by applying tension and supporting the product's weight, allowing for horizontal drawing-off without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thick multi-layered web-shaped products are drawn off using traditional clamp carriers without additional support, then the drawing-off process can be performed, but the products sag due to self-weight causing deformation and quality loss
Solution Approach 1:
A support system consisting of support elements (rollers or belts) is introduced as an intermediary between the clamp carrier and the web-shaped product. This mediator provides continuous support to the product during drawing-off, distributing the product's self-weight and preventing sagging while maintaining the integrity of the thick multi-layered structure.
Solution Approach 2:
The support system is designed to be movable and synchronized with the clamp carrier's motion. The support elements dynamically adjust their position and speed to match the drawing-off process, providing continuous support throughout the motion range while allowing the clamp carrier to perform its clamping and releasing functions.
2Reliability
If the support system uses stationary support elements, then the product can be supported, but the support system cannot synchronize with the moving clamp carrier
Solution Approach 1:
The support system is designed as a dynamic system where support elements are mounted on or coupled with the movable clamp carrier. This allows the support system to move synchronously with the clamp carrier throughout the drawing-off process, maintaining continuous support while adapting to the changing position and speed requirements of the drawing-off operation.
3Productivity
If traditional winding rollers are used for thick products, then the products can be wound up, but the inner structures of three-dimensional products are deformed
Solution Approach 1:
Instead of rigid winding rollers that exert concentrated pressure and deform thick multi-layered products, the invention uses flexible support elements such as belts or soft rollers. These flexible elements distribute the support force across the entire product surface, preventing deformation of the delicate inner structures while still enabling continuous drawing-off and winding operations.
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 apparatus effectively minimizes sagging of thick web-shaped products during drawing-off, ensuring the quality of multi-layered woven webs by maintaining them in a sag-free state, preventing deformation and allowing for efficient handling of products up to 20 mm or more in thickness.
Implementation Method 1
a support system for the web-shaped product is provided at least between an apparatus side that faces toward the weaving machine, and the clamp carrier within the carrier frame apparatus to avoid sagging of the web-shaped product
Implementation Method 2
due to the self-weight an impermissibly large sagging arises
Data Source
AI summary
An apparatus for drawing-off a web-shaped product from a weaving machine in a drawing-off direction includes: at least one clamp carrier having clamps for the web-shaped product; a carrier frame apparatus on which the clamp carrier is guided; a drive arrangement by which the clamp carrier is drivable back and forth in a motion range; and a support system for the web-shaped product. The support system is arranged in an area between the apparatus side facing toward the weaving machine and the clamp carrier, within the carrier frame apparatus, in such a manner so that a sagging of the web-shaped product in this area is avoided or limited by the support system.