3D Geotextile Winding Structure to Prevent Folding and Creasing
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Solution Overview
Problem
Existing geotextile materials in civil engineering applications often lack both sufficient stiffness to resist deformation under load and high interlock with soil, failing to effectively combine these essential characteristics.
Innovation Solution
A three-dimensional nonwoven geotextile material with cell structures that provide confinement and interlock of particulate matter, featuring a nonwoven layer of fibers forming cell structures with a depth of at least 1.0 cm, allowing for high interlock and stiffness, and optionally combined with geogrids to enhance stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional winder is used for winding three-dimensional nonwoven geotextiles, then the winding operation can be performed, but the product quality deteriorates due to folding, creasing, and damage to the three-dimensional structure
Solution Approach 1:
The winding process is divided into multiple sequential stages: feeding the geotextile flat, forming a cone-shaped roll, and then transitioning to cylindrical winding. This segmentation allows each stage to be optimized for its specific function, preventing structural damage during the critical transition phase
Solution Approach 2:
The winder dynamically adjusts the wrap angle and winding tension based on the roll diameter. As the roll grows, the system automatically modifies winding parameters to maintain optimal conditions, preventing folding and creasing that would occur with fixed-parameter winding
2Productivity
If winding tension is increased to improve winding speed, then productivity increases, but manufacturing precision deteriorates due to deformation of the geotextile structure
Solution Approach 1:
The winding tension is dynamically controlled based on real-time monitoring of wrap angle and roll diameter. The system automatically adjusts tension parameters to maintain optimal values throughout the winding process, enabling high-speed operation without deforming the three-dimensional geotextile structure
Solution Approach 2:
The winder incorporates feedback mechanisms that monitor winding parameters and adjust tension accordingly. This closed-loop control ensures that productivity increases do not compromise manufacturing precision, as the system self-corrects to prevent structural deformation
3Volume of stationary object
If the geotextile is wound tightly to reduce roll volume, then storage efficiency improves, but the three-dimensional structure is compressed and damaged
Solution Approach 1:
The winder changes winding parameters including wrap angle, tension, and layer spacing to achieve optimal compaction without compression. By adjusting these parameters, the system reduces roll volume for better storage efficiency while preserving the delicate three-dimensional geotextile structure
4Productivity
If manual winding operations are used to maintain simplicity, then device complexity remains low, but productivity is reduced and quality control is difficult
Solution Approach 1:
The winder is designed as a multi-functional system that can handle different geotextile types and winding configurations through programmable control. This universality justifies the increased complexity by enabling automated high-speed operation and consistent quality control across various applications
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3~4A
AI summary
Winding Apparatus for Winding a Roll of a Three-dimensional Nonwoven Geotextile A winding apparatus (1000) is provided for winding a roll of a three- dimensional geotextile material at a constant outer diameter of the roll, the three-dimensional geotextile material comprising a multitude of cell structures, the winding apparatus comprising a first means (1001) for rotating and a second means for rotating (1011), first arms (1002), each first arm having a first endpoint (1003) and a second endpoint (1004), the first endpoint of the first arms connected to the first means for rotating, wherein the first arms extend in a radial direction from the first means for rotating, second arms (1012), each second arm having a first endpoint (1013) and a second endpoint, the first endpoint of the second arms connected to the second means for rotating, wherein the second arms extend in a radial direction from the second means for rotating, and elongated strips (1005) extending from the second endpoint of the first arms to the second endpoint of the second arms, each elongated strip spaced from each adjacent elongated strip for receiving the cell structures comprised in the three-dimensional geotextile material, wherein the first arms and the second arms are configured to be reduced in length during winding of the roll of three-dimensional geotextile material.