Lightweight Sound-Blocking Sheet with Enhanced Noise Reduction
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Summary
Problems
Current sound-blocking sheet members face limitations in design freedom, manufacturing ease, productivity, and durability, particularly due to complex manufacturing steps and the use of rigid substrates, which restrict their versatility and economic efficiency, and there is a need for a lightweight solution that surpasses the law of mass action for noise reduction.
Innovation solutions
A sound-blocking sheet member with a sheet having rubber elasticity and specific resonance portions, where the weight portion is supported by a base portion and has a penetration portion, allowing for even resin filling and improved manufacturing stability, and a method involving a mold with cavities where the weight portion's position is regulated by a projection and recessed portion for uniform placement.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If stump-shaped protrusions (resonators) are installed on a substrate using adhesive, then sound-blocking performance is improved, but manufacturing steps become complicated and productivity decreases
Why choose this principle:
The patent merges the substrate and resonators into a single integral structure by molding the resonators directly from the substrate material (e.g., foam material), eliminating the need for separate adhesive installation steps. This combining approach maintains sound-blocking performance while dramatically simplifying manufacturing.
Principle concept:
If stump-shaped protrusions (resonators) are installed on a substrate using adhesive, then sound-blocking performance is improved, but manufacturing steps become complicated and productivity decreases
Why choose this principle:
The substrate material serves multiple functions: it provides the base structure, acts as the molding medium for resonators, and eliminates the need for separate adhesive materials. This multi-functionality reduces the number of components and manufacturing steps.
Application Domain
Data Source
AI summary:
A sound-blocking sheet member with a sheet having rubber elasticity and specific resonance portions, where the weight portion is supported by a base portion and has a penetration portion, allowing for even resin filling and improved manufacturing stability, and a method involving a mold with cavities where the weight portion's position is regulated by a projection and recessed portion for uniform placement.
Abstract
An object of the present invention is to provide a resonator that is relatively lightweight, has high sound-blocking performance overwhelming the law of mass action, and is excellent in terms of manufacturability and durability. The resonator includes at least a sheet and at least one resonance portion. The resonance portion is provided in contact with a sheet surface of the sheet, and the resonance portion includes a weight portion and a base portion. The weight portion is supported by the base portion and has a larger mass than the base portion, and the weight portion has a penetration portion. The base portion is in contact with a surface on a resonance portion front end side of the weight portion and covers the weight portion.