Flexible Strip Width Variation for Mesh Bag Durability
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Solution Overview
Problem
Existing mesh bags require excessive material for production, leading to increased costs without enhancing mechanical properties, and current designs with constant width strips are prone to breakage when the bag is suspended by its upper end.
Innovation Solution
A roll of flexible plastic strip with a repetitive pattern featuring functional sections and thinner connecting sections, where the connecting sections have a minimum width less than the functional sections and can have a variable contour, allowing for reduced material usage and enhanced durability without affecting mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If strips with constant width are used throughout, then manufacturing simplicity is maintained, but material usage increases and costs rise
Solution Approach 1:
The strip is designed with different width characteristics in different sections: functional sections maintain a constant width Z for mechanical strength, while connecting sections have a reduced minimum width z. This local differentiation optimizes material usage without compromising the mechanical properties where needed.
2Ease of manufacture
If connecting sections have reduced width to save material, then production cost decreases, but strip breakage risk increases when bag is suspended
Solution Approach 1:
The functional sections maintain the full width Z required for mechanical strength and resistance to breakage, while only the connecting sections have reduced width z. This ensures that the load-bearing portions of the strip retain adequate dimensions while material is saved in non-critical areas.
Solution Approach 2:
The strip is divided into distinct functional sections and connecting sections with different width characteristics. This segmentation allows the load-bearing functional portions to maintain full strength while the connecting portions use less material, resolving the contradiction between cost and reliability.
3Area of stationary object
If strip length is increased to cover the full height of the bag, then complete coverage is achieved, but excess material is used in the connecting portion
Solution Approach 1:
The connecting sections have a reduced minimum width z compared to the functional section width Z, allowing the strip to maintain full coverage length while using less material in the non-load-bearing connecting portions.
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 solution reduces production costs by optimizing strip width distribution and prevents strip breakage when the bag is suspended, maintaining mechanical integrity and allowing for creative design without increasing costs.
Implementation Method 1
said strip being suitable for being welded to the body of a tube of plastic fabric or extruded mesh
Data Source
Figure 1~2
Figure 3~5
AI summary
A roll (1) of flexible strip (2) for producing bags (8), the strip being a strip made of a plastic material suitable for being welded to the body of a tube of plastic fabric or extruded mesh (4), said strip being wound upon itself longitudinally around a support intended to be coupled to the shaft of a machine, the strip having a repetitive pattern along its length, comprising a functional section (6) and a connecting section (7) contiguous thereto, having a length (L) equal to or greater than the length (I) of the mentioned functional section and having at least one portion having a minium width (z) less than the width (Z) of the functional section.