Multilayer Protective Profile Edge Reinforcement
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Solution Overview
Problem
Existing multilayer protective profiles face challenges in achieving high flexural strength without excessive material usage and cost, with the outer shell often tearing at free longitudinal edges when subjected to bending forces.
Innovation Solution
A multilayer protective profile design featuring an inner core with layers of varying widths, where at least one layer of greater width extends to cover the edges, enhancing edge reinforcement and reducing material requirements by distributing stress more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer shell is made of high quality material to increase flexural strength, then the mechanical properties improve, but the manufacturing cost increases
Solution Approach 1:
The patent applies different quality levels to different parts of the profile. The outer shell uses high quality material specifically at the edges and corners where mechanical strength is most needed, while other portions can use standard quality material. This localized approach increases flexural strength at critical locations without uniformly increasing manufacturing cost across the entire profile.
Solution Approach 2:
The patent employs composite construction with an outer shell of high quality material combined with an inner core of standard quality material. This composite structure allows the high cost material to be used only where it provides the most benefit (outer shell for impact resistance) while the inner core provides structural support at lower cost, optimizing the balance between strength and manufacturing cost.
2Strength
If more raw materials are used to increase flexural strength, then the mechanical properties improve, but the manufacturing cost increases
Solution Approach 1:
The patent concentrates material usage at critical locations rather than uniformly distributing it. The outer shell is thicker and uses more material at edges and corners where impact forces are applied, while reducing material quantity in less critical areas. This localized material concentration achieves high flexural strength with optimized, rather than excessive, raw material usage.
Solution Approach 2:
The composite structure combines an outer shell with higher material density and thickness with an inner core with standard material properties. This allows the profile to achieve high flexural strength through the outer shell's material concentration at critical locations while the inner core provides structural support with more efficient material distribution, reducing overall raw material requirements compared to a uniform structure.
3Reliability
If the outer shell extends at free longitudinal edges to prevent tearing, then reliability improves, but device complexity increases
Solution Approach 1:
The patent extends the outer shell specifically at the free longitudinal edges and corners where tearing is most likely to occur, rather than uniformly extending it along the entire profile. This localized extension provides enhanced reliability at critical stress points while keeping the overall profile structure simpler and avoiding unnecessary material usage in areas where the shell does not need to extend.
Data Source
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AI summary
Profile (110) for protection against impact, comprising two longitudinal flanges (112, 114) each comprising a free longitudinal edge (116), the profile being of a multilayered type and comprising an inner core in the superimposed layers (120, 121) and an outer shell (122), at least one of the layers (121) of the core having a width that is greater than that of the other layers (120) of the core and comprising longitudinal end portions (130) which extend along the free longitudinal edges of the flanges and which are folded over on the surface of the other layer.