Textile Lifting Sling Stiffening Section Using Plastic Intermediate Layer
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Solution Overview
Problem
Existing textile lifting slings with metal stiffening elements face challenges in achieving a reliable connection between synthetic fibers and metal components due to material property differences, and are hindered by the added weight of metal stiffening elements.
Innovation Solution
A two-layer strap section with a rigid intermediate plastic layer, which is materially bonded to the tape layers, provides a stiffening section that maintains rigidity and stability during load handling, using a plastic intermediate layer that can be filled or contain a lightweight stiffening body for optimized weight and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal stiffening elements (sheet metal or tubular steel) are used in the lifting sling, then the rigidity and load-bearing capacity are improved, but the weight of the lifting sling increases significantly
Solution Approach 1:
The patent changes the material parameter from metal to plastic, specifically using a plastic intermediate layer with appropriate mechanical properties to achieve the required rigidity while significantly reducing the weight of the stiffening section compared to metal alternatives
Solution Approach 2:
The patent creates a composite structure consisting of two textile layers combined with a plastic intermediate layer. This composite material approach allows the plastic layer to provide stiffening function while being much lighter than metal, optimizing the weight-strength ratio
2Stability of the object's composition
If metal stiffening elements are used in the lifting sling, then the structural stability is improved, but the connection reliability between textile and metal components deteriorates due to different material properties
Solution Approach 1:
The patent uses a plastic intermediate layer that can be bonded to both textile layers, creating a more homogeneous material system compared to metal components. The plastic material properties are better matched with textile materials, enabling more reliable bonding and reducing connection failures
Solution Approach 2:
The plastic intermediate layer acts as an intermediary between the two textile layers, providing a bonding interface that is compatible with both textile materials. This intermediary layer ensures stable connection and load transfer, eliminating the material incompatibility issues between textile and metal
3Ease of manufacture
If a flexible intermediate layer is used between the two layers, then the ease of manufacture is improved, but the rigidity and load-bearing capacity deteriorate due to lack of sufficient stiffness
Solution Approach 1:
The patent specifies that the intermediate layer must have appropriate mechanical parameters, specifically rigidity and stiffness, to replace flexible materials. The plastic intermediate layer is designed with sufficient rigidity to prevent deformation under load while maintaining manufacturability through bonding processes
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 enhances the connection between layers and reduces weight by using a non-flexible plastic intermediate layer, ensuring load stability and preventing unexpected position changes during transport, while maintaining structural integrity.
Implementation Method 1
The intermediate layer is materially bonded to the two layers of tape and glued, for example
Data Source
Figure 1
AI summary
The invention relates to a textile lifting strap (1) made entirely or partially of synthetic fibers with a stiffening section (2) for handling, in particular for transporting loads.