Foamed Resin Damping Metal Sheet for Vibration and Noise Blocking
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Solution Overview
Problem
Conventional damping steel sheets, particularly of the constrained type, face limitations in effectively reducing vibrations and noise due to reliance on viscoelastic properties of polymer resins, necessitating improved methods to enhance vibration-damping and sound insulation performance.
Innovation Solution
A constrained-type vibration-damping metal sheet is manufactured by bonding a foamed resin film containing specific compositions between metal plates, forming foam pores through controlled heating and cooling processes, utilizing the viscoelastic properties of polymer resin and foam pores for enhanced damping and noise blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional polymer resins are used in constrained-type damping steel sheets, then vibration-damping performance is achieved through viscoelastic properties, but sound insulation performance is insufficient
Solution Approach 1:
The patent introduces foam pores into the resin layer to create a porous structure that enhances sound insulation performance. The foam pores act as acoustic absorbers and insulators, blocking noise transmission while maintaining the vibration-damping capabilities of the polymer resin matrix.
Solution Approach 2:
The patent creates a composite material system combining polymer resin with foam structure, integrating the viscoelastic properties of the resin for vibration damping with the acoustic insulation properties of the foam pores, achieving both vibration control and sound insulation functions simultaneously.
2Object-generated harmful factors
If foam pores are introduced to enhance sound insulation, then noise blocking effect is improved, but manufacturing complexity increases
Solution Approach 1:
The patent controls foam pore formation by adjusting parameters such as foaming agent concentration, curing temperature, and pressure conditions during manufacturing. By optimizing these parameters, the foam structure is created efficiently without requiring complex additional processing steps.
3Object-generated harmful factors
If polymer resin is used for vibration damping, then viscoelastic energy absorption is achieved, but the damping effect is limited for high-noise applications
Solution Approach 1:
The foam porous structure increases the surface area and creates multiple interfaces within the resin layer, enhancing energy dissipation through friction and viscous effects as vibrations pass through the porous network, thereby improving damping performance beyond what solid resin alone can achieve.
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 method effectively produces a metal sheet with improved vibration control and noise blocking capabilities by leveraging the properties of foam pores and polymer resin, achieving significant reduction in vibrations and noise.
Implementation Method 1
forming foam pores through controlled heating and cooling processes
Implementation Method 2
utilizing the viscoelastic properties of polymer resin and the vibrations/noise blocking effect of foam pores
Implementation Method 3
foam pores for enhanced damping and noise blocking
Data Source
AI summary
Provided are a constrained-type vibration-damping metal sheet having foam pores and a method for manufacturing same. The constrained-type vibration-damping metal sheet of the present invention comprises: a lower metal sheet; a foam resin film bonded to the lower metal sheet; and an upper metal sheet bonded to the foam resin film, wherein the foam resin film has foam pores comprising, by wt % of itself, 85-95% of a thermoplastic polyethylene resin having a number average molecular weight of 8000-12000, 0.1-1% of stearic acid, 1-5% of a styrene-ethylene-butadiene-styrene (SEBS) resin, 0.5-5% of a foaming agent, 1-4% of a dicumyl peroxide crosslinking agent, and 0.5-2% of ZnO foaming aid.