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Thermoformed elements for sound protection of motor vehicles

A motor vehicle, thermoforming technology, applied in the direction of vehicle parts, synthetic resin layered products, transportation and packaging, etc., can solve the problems of harmful consumption of hydrocarbon fuels, increase the weight of motor vehicles, etc.

Active Publication Date: 2020-05-19
CENTRE DETUDE ET DE RECHERCHE POUR LAUTOMOBILE (CERA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This results in obtaining a massy element that contributes to increasing the weight of the motor vehicle, which is detrimental to hydrocarbon fuel consumption

Method used

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  • Thermoformed elements for sound protection of motor vehicles
  • Thermoformed elements for sound protection of motor vehicles
  • Thermoformed elements for sound protection of motor vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] With reference to the drawings, a thermoformed element 1 for sound protection of motor vehicles is described, in particular in the form of a muffler for an engine flap or a lateral trunk liner, said thermoformed element comprising two porous fiber layers , namely a porous fibrous front layer 2 and a porous fibrous back layer 3, these two porous fibrous layers are in particular in the form of fleece, felt or non-woven fibers, said thermoforming element viewed from the front view has:

[0020] - a heavy zone 4 with strong sound protection comprising a first intermediate layer 5 of crushed recyclable material arranged between said fiber layers;

[0021] - at least one light zone 6a, 6b with weak sound protection,

[0022] The light area:

[0023] - comprising a second intermediate layer 7 of crushed recyclable material arranged between said fibrous layers, said second intermediate layer having a mass per unit area less than that of said first intermediate layer, so that ...

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PUM

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Abstract

The invention relates to an element (1) comprising two porous fibrous layers, namely a porous fibrous front layer (2) and a porous fibrous back layer (3), said element, viewed from the front view, has: - a strong sound protection a heavy zone (4) comprising a first intermediate layer (5) of crushed recyclable material arranged between two porous fibrous layers; at least one light zone (6a, 6b), said light zone comprising a second intermediate layer (7) of crushed recyclable material arranged between two porous fibrous layers, said second intermediate the mass per unit area of ​​the layer is less than the mass per unit area of ​​said first intermediate layer, so as to form a light region (6a) of the first type, or practically no intermediate layer is provided, said two porous fibrous layers are arranged in contact with each other, In order to form light regions of the second type (6b).

Description

technical field [0001] The invention relates to a thermoformed element for sound protection of motor vehicles and to a production method for producing such a thermoformed element. Background technique [0002] It is known to manufacture a thermoformed element for sound protection of motor vehicles, for example in the form of an engine flap or a muffler for a lateral boot liner, said thermoformed element comprising two porous fiber layers , an intermediate layer made of crushed recyclable material is arranged between the two porous fibrous layers. [0003] In particular it is known to produce intermediate layers made of crushed production waste, in particular of the type of plastics material films, fleece or the like. [0004] The layer of crushed material arranged by spreading has an approximately uniform mass per unit area, it being known that the elements are usually arranged facing the sound emitting inhomogeneous surface. [0005] To ensure suitable sound protection, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/02B32B5/14B32B5/22B32B5/26B32B7/02B32B7/04B32B7/10B32B27/30B32B27/08B32B27/12B32B3/00B32B3/02B32B3/26B32B33/00
CPCB32B3/00B32B3/02B32B3/26B32B5/02B32B5/022B32B5/024B32B5/14B32B5/142B32B5/22B32B5/26B32B7/02B32B7/04B32B7/10B32B27/08B32B27/12B32B27/30B32B33/00B32B2262/02B32B2250/40B32B2262/00B32B2305/18B32B2307/10B32B2307/102B32B2307/56B32B2307/724B32B2605/08B32B2605/003B32B2605/00B32B1/00B32B5/06B32B5/24B32B3/28B32B2255/02B32B2255/20B32B2255/26B32B27/06B32B27/28B32B27/304B60R13/08
Inventor D·勒麦尔G·克里尼翁C·卡普龙
Owner CENTRE DETUDE ET DE RECHERCHE POUR LAUTOMOBILE (CERA)