Method for the sound damping and/or sound insulation of components
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Solution Overview
Problem
Conventional soundproofing methods for thin-walled metal and plastic components, such as bitumen foils and plastisol coatings, are brittle, difficult to apply on complex shapes, require extensive warehousing, and have limitations in noise-dampening effectiveness, especially in environments with limited high-temperature processing time.
Innovation Solution
Applying thermoplastic compounds directly extruded at melt temperatures between 120°C and 300°C as granules with a high filler content, using a combination of thermoplastic polymers and fillers, and a hot-melt adhesive, to create a soundproofing layer with defined profiles on metallic and plastic components, including those with complex geometries, via direct extrusion and robotic application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If bitumen foils are used for soundproofing, then material cost is reduced, but adhesion and flexibility deteriorate causing flaking at low temperatures
Solution Approach 1:
The patent changes the material parameters by using thermoplastic compounds with specific melt temperatures (120-300°C) and filler densities (1.5-5 g/cm³), transforming the material from brittle bitumen to a thermoplastic composition that maintains adhesion while providing soundproofing functionality
Solution Approach 2:
The invention creates a composite material system combining thermoplastic polymers with high-density fillers and hot-melt adhesives, where the composite properties provide both adhesion (through the adhesive component) and soundproofing (through the filler-loaded thermoplastic matrix), resolving the contradiction between low cost and reliable adhesion
2Quantity of substance
If preformed bitumen parts are used, then material cost is reduced, but applicability to complex shapes deteriorates
Solution Approach 1:
The patent employs an extrusion process that delivers thermoplastic compound through a nozzle, allowing the material to be deposited in a controlled manner that adapts to complex geometries. The extrusion mechanism enables precise placement on three-dimensional surfaces, overcoming the limitation of preformed parts that cannot conform to complicated shapes
Solution Approach 2:
By changing the thermoplastic compound to a state suitable for extrusion (granular form before heating), the invention enables direct application to complex shapes. The material transitions from solid granules to molten state during extrusion, allowing it to flow and conform to any surface geometry before solidifying
3Reliability
If multiple stamped parts are used, then soundproofing coverage is improved, but warehousing cost and complexity increase
Solution Approach 1:
The extrusion process creates a universal application method that can cover any shape and size of component with a single continuous operation. Instead of requiring multiple pre-formed stamped parts for different areas, the extrusion nozzle can adapt to any geometry, eliminating the need for inventing and storing multiple specialized parts
Solution Approach 2:
The invention merges the soundproofing function with a single continuous application process, combining what would have required multiple separate stamped parts into one unified extrusion operation. This consolidation eliminates warehousing needs for multiple components while maintaining comprehensive soundproofing coverage
4Quantity of substance
If bitumen foils are used, then initial material cost is reduced, but temperature resistance and durability deteriorate
Solution Approach 1:
The patent changes the temperature parameter by selecting thermoplastic compounds with melt temperatures between 120-300°C, which are higher than the service temperature range. This ensures the material remains stable and resistant at operating temperatures, unlike bitumen foils that become brittle at low temperatures and degrade at high temperatures
Solution Approach 2:
The composite formulation incorporating thermoplastic polymers, high-density fillers, and hot-melt adhesives creates a material system with enhanced temperature resistance. The thermoplastic matrix provides thermal stability, the fillers add density for soundproofing, and the adhesives ensure bonding durability across temperature variations
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 method provides effective soundproofing and vibration insulation with reduced material storage needs, improved adhesion, and efficient application on components with complex shapes, even in environments with limited high-temperature processing time, enhancing noise reduction and durability.
Implementation Method 1
thermoplastic compounds are applied to the components as a defined profile by direct extrusion at melt temperatures between 120 and 300°C
Implementation Method 2
thermoplastic compounds are applied to the components as a defined profile by direct extrusion at melt temperatures between 120 and 300°C
Implementation Method 3
the compounds being in the form of granules with a density of 1.5 to 5 g/cm3 before the heating... using a combination of thermoplastic polymers and fillers, and a hot-melt adhesive
Data Source
Figure 1~2
Figure 3
AI summary
A description is given of a method for the sound damping and/or sound insulation of metallic components and/or plastic components in which thermoplastic compounds are applied to the components as a defined profile by direct extrusion at melting temperatures of between 120 and 300°C, wherein, before the heating, the compounds are in the form of granules with a density of 1.5 to 5 g/cm3.