Expandable Shell Reinforcement for Hollow Profile Cavities
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Solution Overview
Problem
Existing methods for reinforcing shell structures with hollow profiles fail to efficiently utilize installation space for soundproofing and energy absorption, leading to suboptimal noise comfort and increased production costs.
Innovation Solution
An expandable shell filled with a bulk material that expands at activation temperature to form a mass block, providing both mechanical stabilization and sound insulation, which is integrated into the hollow profiles without requiring additional space or costly reinforcement parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional reinforcement methods (welded metal reinforcements, polyamide inserts, fiber-reinforced plastic mats) are used to stabilize cavities, then structural stability and buckling prevention are improved, but soundproofing performance and energy absorption are suboptimal
Solution Approach 1:
The patent employs a composite reinforcement system combining an expandable shell containing bulk material (such as foam or granular material) with the hollow profile structure. This composite approach integrates structural reinforcement with sound absorption and energy dissipation properties, where the bulk material provides damping and acoustic insulation while the expandable shell ensures structural stability and buckling prevention.
Solution Approach 2:
The patent utilizes porous or bulk materials (such as foam materials, granular materials, or other compressible materials) filled within the expandable shell to provide sound absorption and energy dissipation. The porous structure of these materials allows for acoustic damping and energy absorption while maintaining structural integrity when expanded.
2Object-affected harmful factors
If additional reinforcement components and damping materials are added to improve soundproofing and energy absorption, then acoustic performance is improved, but installation space consumption and production costs increase
Solution Approach 1:
The patent creates a multi-functional reinforcement system where the expandable shell containing bulk material simultaneously provides structural stabilization, sound absorption, and energy dissipation functions. This universal approach eliminates the need for separate damping materials and reinforcement components, as the single integrated structure performs multiple functions including acoustic insulation and structural support.
Solution Approach 2:
The patent merges the functions of structural reinforcement, soundproofing, and energy absorption into a single integrated component system. The expandable shell with bulk material combines what would traditionally require separate components (metal reinforcements, damping materials, energy-absorbing bodies) into one unified structure that occupies minimal installation space while providing all necessary functions.
3Strength
If welded-in metal reinforcements and multiple reinforcement components are used, then structural strength is improved, but production costs and device complexity increase
Solution Approach 1:
The patent segments the reinforcement system into two main components: an expandable shell and bulk material. This segmentation allows for simplified manufacturing and assembly compared to traditional multi-component reinforcement systems. The expandable shell can be pre-formed and then expanded in-situ, reducing the complexity of on-site assembly and eliminating the need for complex welding and fastening operations.
Solution Approach 2:
The patent utilizes parameter changes in the bulk material's physical state (from compressed/contracted to expanded) to achieve structural reinforcement. The bulk material is introduced in a compressed state within the expandable shell and then expanded to its full volume during or after installation, providing structural strength without requiring complex assembly operations. This phase change approach simplifies the overall device complexity compared to traditional rigid reinforcement systems.
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
This solution enhances soundproofing and energy absorption while reducing production costs and weight, improving the acoustic and structural performance of the shell structure without additional installation space or reinforcement components.
Implementation Method 1
The bulk material is designed in such a way that it expands when exposed to an activation temperature and combines to form a mass block
Implementation Method 2
The expandable casing is designed in such a way that it brings about a compression and a pressure build-up of the expanding bulk material
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a reinforcement means (10) for stabilising a cavity (7) formed by connected hollow profiles (3, 5), comprising: an expandable casing (12), and bulk material (14), which is enclosed in the expandable casing (12), the bulk material (14) being designed such that it expands under the effect of an activation temperature and agglomerates to form a block of mass, and the expandable casing (12) is designed such that it causes compression of and a pressure build-up in the expanding bulk material (14). The invention also relates to a corresponding method for reinforcing a cavity in a carcass structure (1) by means of at least one reinforcement means (10) of this kind.