Resin-Free Fibrous Mat for Vehicle Exhaust Insulation
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Solution Overview
Problem
Existing soundproofing and heat-insulating mats for vehicle exhaust systems degrade due to high temperatures, causing environmental pollution and loss of insulating effectiveness, as they contain consolidating resins and amalgams that decompose and fragment.
Innovation Solution
A method for producing a fibrous mat without consolidating resins or amalgams, comprising a fibrous core and an outer tubular fibrous containment sleeve made of continuous or textured fibers, wound in a specific helical trajectory to form a self-supporting, flexible structure that can be installed in vehicle components for acoustic and thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If consolidating resins and amalgams are used to stiffen the fibres in the preform, then the fibres are prevented from flaking during insertion, but the resins decompose and fragment at high temperatures causing environmental pollution and deterioration of soundproofing capacity
Solution Approach 1:
The invention extracts and removes the harmful consolidating resins and amalgams from the fibrous preform structure. Instead of using chemical binders, the patent employs a purely mechanical construction method where fibres are wound and interlaced to form a self-supporting structure, thereby eliminating the source of environmental pollution while maintaining structural integrity
Solution Approach 2:
The fibrous preform is designed to be self-supporting through its own structural arrangement. The fibres are wound and interlaced in such a way that the structure maintains its consistency and prevents flaking through mechanical interlocking alone, without requiring external chemical consolidants that would decompose at high temperatures
2Strength
If consolidating resins and amalgams are used to stiffen the fibres, then the preform maintains its structure during insertion, but the resins decompose at high temperatures deteriorating the soundproofing capacity
Solution Approach 1:
The harmful consolidating resins are completely removed from the system. The invention replaces chemical binding with mechanical interlocking of fibres through winding and interlacing, ensuring that the soundproofing structure maintains its integrity without decomposition at high temperatures
Solution Approach 2:
The fibrous structure serves itself by using its own fibres to maintain consistency through mechanical interlocking. The wound and interlaced configuration creates a self-supporting framework that preserves soundproofing capacity without relying on external chemical agents that would deteriorate under thermal stress
3Object-generated harmful factors
If a fibrous mat without consolidating resins is produced, then environmental pollution is prevented, but the fibres may Flake during insertion requiring alternative binding methods
Solution Approach 1:
The fibrous structure is divided into distinct functional zones: an inner core formed by wound fibrous bundles providing structural consistency, and an outer layer of interlaced fibres providing additional mechanical reinforcement. This segmentation allows each zone to perform its specific function without requiring chemical binders
Solution Approach 2:
The invention creates a composite fibrous structure where different fibre arrangements (wound bundles and interlaced layers) work together to provide mechanical strength and consistency. This composite approach replaces chemical consolidation with physical structural integration, preventing fibre flaking without environmental pollution
4Duration of action of stationary object
If a self-supporting fibrous structure is created without resins, then the mat remains flexible and durable, but the production process becomes more complex
Solution Approach 1:
The production process leverages the self-supporting nature of the fibrous structure itself. The fibres are wound and interlaced in a systematic pattern that creates structural integrity through geometry alone, allowing the material to support itself during and after production without requiring additional chemical treatment or complex curing processes
Data Source
AI summary
Method for producing a fibrous mat, which can be installed in a component of a vehicle provided with an internal combustion engine for acoustically and thermally insulating the component. The method comprises the steps of: providing a fibrous core consisting of at least one fibrous bundle that extends along a direction that is approximately parallel to a longitudinal axis; wrapping the outer surface of the fibrous core by means of a fibrous bundle that extends along a direction that is approximately transverse to the bundle of the fibrous core, thus providing at least one outer tubular fibrous containment sleeve that extends, in turn, along the longitudinal axis and covers the outer surface of the fibrous core to trap the fibrous core therein.