Zigzag Supply Bundle for Consistent Tricot Pull-Off Force
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Solution Overview
Problem
Existing supply bundles of tubular, circular-knitted tricot material for covering cuboid objects suffer from inconsistent force requirements for material removal and irregular geometric structures, leading to variable friction and aesthetically unappealing appearances.
Innovation Solution
A supply bundle is formed with layers arranged in a zigzag configuration around a central axis, where each layer is connected via 180° fold lines, maintaining consistent layer lengths and rectangular cross-sections, ensuring constant force and regular material application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the supply bundle is irregularly compressed and combined in the axial direction, then the supply bundle can be formed, but the force required to pull the tricot material off varies and the structure is geometrically inconsistent
Solution Approach 1:
The supply bundle is divided into multiple layers (first layer, second layer, third layer, etc.) arranged in a specific zigzag pattern around the central axis. Each layer is segmented into distinct sections that can be independently controlled during formation, allowing consistent geometric structure while maintaining ease of manufacture through modular layering
Solution Approach 2:
The layers are pre-arranged in a zigzag configuration with predetermined fold lines before the supply bundle is put into service. The fold lines are created at specific positions (180° apart) during the formation process, ensuring that the geometric regularity is established in advance rather than requiring adjustment during use
2Quantity of substance
If the supply bundle is irregularly combined, then material can be loaded, but the pull-off force varies and friction changes with usage
Solution Approach 1:
The tricot material is divided into discrete layers stacked in a regular zigzag pattern, with each layer contributing a predictable amount of material. This segmentation ensures that as layers are sequentially removed, the pull-off force remains consistent because each layer presents similar friction characteristics and geometry
Solution Approach 2:
The regular zigzag arrangement with fixed fold lines maintains constant geometric parameters (layer spacing, fold position, radial distance) throughout the supply bundle. This parameter consistency ensures that the friction and pull-off force remain uniform regardless of how much material has been used
3Manufacturing precision
If layers are arranged in a zigzag configuration with 180° fold lines, then the structure is regular and visually appealing, but the device complexity increases
Solution Approach 1:
The zigzag configuration introduces a controlled asymmetry in the layer arrangement, with fold lines positioned at 180° intervals around the central axis. This asymmetric but repeating pattern creates visual appeal and geometric regularity while maintaining a manageable level of complexity through its periodic nature
Solution Approach 2:
The layers are arranged in a curved, circumferential pattern around the central axis, forming a ring-shaped supply bundle. The zigzag fold lines follow the curvature of the ring, creating a regular three-dimensional structure that is both visually appealing and mechanically consistent
Data Source
Figure 1
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AI summary
A supply package has a quantity of tubular, preferably round-knitted, elastic tricot material; the supply package has a central axis (26); the quantity of material is arranged in an annular manner around the central axis (26). The tricot material is folded in a zigzag shape in a number of superposed layers, wherein the individual layers are located at an increasingly large distance from the central axis (26).