FR2923431A1 - Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer - Google Patents

Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer Download PDF

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Publication number
FR2923431A1
FR2923431A1 FR0707892A FR0707892A FR2923431A1 FR 2923431 A1 FR2923431 A1 FR 2923431A1 FR 0707892 A FR0707892 A FR 0707892A FR 0707892 A FR0707892 A FR 0707892A FR 2923431 A1 FR2923431 A1 FR 2923431A1
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FR
France
Prior art keywords
layer
screen
film
elastic
structural
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR0707892A
Other languages
French (fr)
Inventor
Dominique Lemaire
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre dEtude et de Recherche pour lAutomobile CERA
Original Assignee
Centre dEtude et de Recherche pour lAutomobile CERA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centre dEtude et de Recherche pour lAutomobile CERA filed Critical Centre dEtude et de Recherche pour lAutomobile CERA
Priority to FR0707892A priority Critical patent/FR2923431A1/en
Publication of FR2923431A1 publication Critical patent/FR2923431A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/086—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of pure plastics material, e.g. foam layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/003—Interior finishings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

The screen (1) has a structural porous layer (2), acoustic sealed film (3) and elastic layer (4) that are superimposed one on another. The porous and elastic layers are formed of compressed felt e.g. glass fibers, joined by resin. The film is made of plastic material. A protection layer (5) is placed with respect to the structural layer and/or elastic layer. A complementary sealed film is placed against an external surface of the porous layer. The thickness of the porous layer ranges is 3 mm, and the density of the porous layer is 0.20. An independent claim is also included for a method for forming a thermal and acoustic protection screen.

Description

L'invention concerne un écran de protection thermique et acoustique de véhicule automobile, et un procédé de réalisation d'un tel écran. The invention relates to a motor vehicle thermal and acoustic protection screen, and a method of producing such a screen.

Il est connu de réaliser un écran de protection thermique et acoustique de véhicule automobile, notamment de tunnel, comprenant, superposés l'un sur l'autre, une couche de matériau élastique, notamment à base de feutre, destinée à être disposée contre la tôle du véhicule, et une structure métallique emboutie, notamment en aluminium, destinée à être tournée vers la source de chaleur, formée notamment d'une ligne d'échappement. It is known to provide a thermal and acoustic protection screen for a motor vehicle, in particular a tunnel comprising, superimposed on one another, a layer of elastic material, in particular based on felt, intended to be arranged against the sheet metal of the vehicle, and a stamped metal structure, in particular aluminum, intended to be turned towards the heat source, formed in particular of an exhaust line.

Un tel ensemble forme un système d'isolation acoustique de type masse/ressort, la masse étant formée par la structure et le ressort par la couche élastique. En outre, la structure présente des propriétés d'isolation thermique par réflexion apportées par l'aluminium. Such an assembly forms a sound insulation system mass / spring type, the mass being formed by the structure and the spring by the elastic layer. In addition, the structure has reflective thermal insulation properties provided by aluminum.

Un tel agencement présente l'inconvénient d'être de réalisation complexe et coûteuse, ceci notamment en raison de l'étape d'emboutissage de l'aluminium. En outre, la structure métallique ne permet pas de réaliser de l'absorption acoustique en complément de l'isolation, ce qui ne permet pas une protection acoustique optimale. Such an arrangement has the disadvantage of being complex and expensive, particularly because of the stamping step of aluminum. In addition, the metal structure does not allow to achieve acoustic absorption in addition to the insulation, which does not allow optimal acoustic protection.

L'invention a pour but de pallier ces inconvénients en proposant un agencement utilisable dans le cas de sources de chaleur modérées, notamment de température inférieure à 250°C environ, ce qui est par exemple le cas pour des lignes d'échappement de véhicules non équipés de systèmes catalytiques. The aim of the invention is to overcome these drawbacks by proposing an arrangement that can be used in the case of moderate heat sources, in particular at temperatures of less than approximately 250 ° C., which is for example the case for non-vehicle exhaust lines. equipped with catalytic systems.

A cet effet, et selon un premier aspect, l'invention propose un écran de protection thermique et acoustique de véhicule automobile comprenant, superposés successivement l'un sur l'autre, une couche structurelle de matériau poreux, un film d'étanchéité acoustique et une couche de matériau élastique. 2 La couche structurelle est destinée à être tournée vers la source de chaleur et la couche élastique à être disposée contre la tôle du véhicule. For this purpose, and according to a first aspect, the invention proposes a motor vehicle thermal and acoustic protection screen comprising, superimposed successively on one another, a structural layer of porous material, an acoustic sealing film and a layer of elastic material. The structural layer is intended to be turned towards the heat source and the elastic layer to be disposed against the sheet of the vehicle.

Par couche structurelle, on entend une couche suffisamment rigide pour être autoportante et ainsi conférer à l'écran cette propriété. La rigidité de la couche structurelle lui permet en outre de résister au gravillonnage. Structural layer means a sufficiently rigid layer to be self-supporting and thus confer on the screen this property. The rigidity of the structural layer also allows it to resist grit.

L'agencement proposé permet de réaliser un système d'isolation acoustique de type masse/ressort, la masse étant réalisée par la couche structurelle en association avec le film et le ressort par la couche élastique. En outre, ledit système présente des propriétés d'absorption acoustique en raison du caractère poreux de la couche structurelle, ce qui optimise les propriétés de protection acoustique de l'écran. The proposed arrangement allows for a mass / spring type sound insulation system, the mass being made by the structural layer in association with the film and the spring by the elastic layer. In addition, said system has acoustic absorption properties due to the porous nature of the structural layer, which optimizes the acoustic protection properties of the screen.

Selon un deuxième aspect, l'invention propose un procédé de réalisation d'un tel écran. According to a second aspect, the invention proposes a method of producing such a screen.

D'autres particularités et avantages de l'invention apparaîtront dans la description qui suit, faite en référence à la figure jointe qui est une représentation schématique en coupe partielle d'un écran selon une réalisation. Other features and advantages of the invention will appear in the description which follows, with reference to the attached figure which is a schematic representation in partial section of a screen according to one embodiment.

En référence à la figure, on décrit un écran 1 de protection thermique et acoustique de véhicule automobile, notamment de tunnel ou de sous capot, comprenant, superposés successivement l'un sur l'autre, une couche structurelle 2 de matériau poreux, un film 3 d'étanchéité acoustique et une couche de matériau élastique 4. With reference to the figure, there is described a screen 1 for thermal and acoustic protection of a motor vehicle, in particular a tunnel or under hood, comprising, successively superimposed on one another, a structural layer 2 of porous material, a film 3 acoustic sealing and a layer of elastic material 4.

Par matériau poreux, on entend par exemple un matériau présentant une résistance au passage de l'air comprise entre 500 et 2500N.s.m-3. Le film 3 permet en outre de réaliser une étanchéité de la couche élastique 4 vis à vis des fluides.30 3 Selon une réalisation, la couche structurelle 2 est à base de feutre comprimé, notamment de fibres de verre, lié par une résine, notamment phénolique. For porous material is meant for example a material having a resistance to the passage of air between 500 and 2500N.s.m-3. The film 3 also makes it possible to seal the elastic layer 4 with respect to the fluids. According to one embodiment, the structural layer 2 is based on compressed felt, in particular glass fibers, bonded with a resin, in particular phenolic.

L'utilisation de fibres de verre permet de réaliser une isolation thermique vis à 5 vis de températures modérées, inférieures à 250°C environ. The use of glass fibers makes it possible to achieve thermal insulation with moderate temperatures of less than about 250.degree.

Selon une réalisation, la couche structurelle 2 présente une épaisseur comprise entre 2 et 5 mm, notamment de 3 mm, et une densité comprise entre 0,15 et 0,25, notamment de 0,20. Selon une réalisation, le film 3 est à base de matière plastique, notamment de polyamide, par exemple de masse surfacique de 50g/m2. According to one embodiment, the structural layer 2 has a thickness of between 2 and 5 mm, in particular of 3 mm, and a density of between 0.15 and 0.25, in particular of 0.20. According to one embodiment, the film 3 is based on a plastic material, in particular polyamide, for example having a surface density of 50 g / m 2.

Selon une réalisation, la couche élastique 4 est à base de feutre, notamment de 15 fibres de verre, lié par une résine, notamment phénolique. According to one embodiment, the elastic layer 4 is based on felt, especially glass fibers, bonded with a resin, especially phenolic resin.

Selon une réalisation, la couche élastique 4 présente une épaisseur comprise entre 10 et 15 mm, notamment de 12 mm, et une densité comprise entre 0,02 et 0,05, notamment de 0,035. According to one embodiment, the elastic layer 4 has a thickness of between 10 and 15 mm, especially 12 mm, and a density of between 0.02 and 0.05, in particular of 0.035.

Selon la réalisation représentée, l'écran 1 comprend en outre une couche de protection 5, par exemple en non tissé, disposée en regard de la couche structurelle 2 et/ou de la couche élastique 4, ladite couche de protection étant disposée en regard de l'une et l'autre dans la réalisation représentée. According to the embodiment shown, the screen 1 further comprises a protective layer 5, for example non-woven, arranged facing the structural layer 2 and / or the elastic layer 4, said protective layer being arranged opposite both in the embodiment shown.

Un non tissé utilisé comme couche de protection 5 peut présenter une masse surfacique de 100 g/m2 environ. II peut être à base de polyester qui peut être traité hydro/oléophobe. A nonwoven used as a protective layer 5 may have a mass per unit area of about 100 g / m 2. It can be based on polyester which can be treated hydro / oleophobe.

30 Selon une réalisation non représentée, l'écran 1 comprend en outre un film d'étanchéité aux fluides complémentaire disposé contre la face externe de la couche structurelle 2. 10 20 25 4 Dans le cas où l'écran 1 comprend un tel film complémentaire et une couche de protection 5 de la couche structurelle 2, ledit film complémentaire est disposé entre ladite couche structurelle et ladite couche de protection. According to a not shown embodiment, the screen 1 further comprises a complementary fluid sealing film disposed against the outer face of the structural layer 2. In the case where the screen 1 comprises such a complementary film and a protective layer 5 of the structural layer 2, said complementary film is disposed between said structural layer and said protective layer.

On décrit à présent un procédé de réalisation d'un écran 1, non pourvu d'un film complémentaire, comprenant les étapes suivantes : • prévoir un moule chauffé, par exemple à 200° C environ, pourvu d'un poinçon et d'une matrice pourvue d'un système d'aspiration sous vide, • disposer dans le moule un complexe comprenant deux couches de feutre pourvues d'une résine, activable par la température du moule, entre lesquelles est disposé un film 3 d'étanchéité, • réaliser une cavité de moulage par descente du poinçon, • réaliser l'aspiration de sorte à plaquer ledit film contre la couche disposée en regard de la matrice et à la comprimer pour réaliser une couche structurelle 2, l'autre couche de feutre formant couche élastique 4, • démouler l'écran 1 obtenu. We now describe a method of producing a screen 1, not provided with a complementary film, comprising the following steps: • provide a mold heated, for example to 200 ° C, provided with a punch and a matrix provided with a vacuum suction system, • arranging in the mold a complex comprising two layers of felt provided with a resin, activated by the temperature of the mold, between which is disposed a sealing film 3, • making a mold cavity by descent of the punch, • carry out the suction so as to press said film against the layer disposed facing the die and to compress it to produce a structural layer 2, the other layer of felt forming an elastic layer 4 , • unmold the screen 1 obtained.

Claims (8)

REVENDICATIONS 1. Ecran (1) de protection thermique et acoustique de véhicule automobile, caractérisé en ce qu'il comprend, superposés successivement l'un sur l'autre, une couche structurelle (2) de matériau poreux, un film (3) d'étanchéité acoustique et une couche de matériau élastique (4). 1. Screen (1) for thermal and acoustic protection of a motor vehicle, characterized in that it comprises, superimposed successively on one another, a structural layer (2) of porous material, a film (3) of acoustic sealing and a layer of elastic material (4). 2. Ecran selon la revendication 1, caractérisé en ce que la couche structurelle (2) est à base de feutre comprimé lié par une résine. 2. Screen according to claim 1, characterized in that the structural layer (2) is based on resin-bound compressed felt. 3. Ecran selon la revendication 1 ou 2, caractérisé en ce que la couche structurelle (2) présente une épaisseur comprise entre 2 et 5 mm, notamment de 3 mm, et une densité comprise entre 0,15 et 0,25, notamment de 0,20. 3. Screen according to claim 1 or 2, characterized in that the structural layer (2) has a thickness of between 2 and 5 mm, in particular 3 mm, and a density of between 0.15 and 0.25, especially of 0.20. 4. Ecran selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le film (3) est à base de matière plastique. 4. Screen according to any one of claims 1 to 3, characterized in that the film (3) is based on plastic. 5. Ecran selon l'une quelconque des revendications 1 à 4, caractérisé en ce 20 que la couche élastique (4) est à base de feutre lié par une résine. 5. Screen according to any one of claims 1 to 4, characterized in that the elastic layer (4) is based on resin-bonded felt. 6. Ecran selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comprend en outre une couche de protection (5) disposée en regard de la couche structurelle (2) et/ou de la couche élastique (4). 6. Screen according to any one of claims 1 to 5, characterized in that it further comprises a protective layer (5) arranged opposite the structural layer (2) and / or the elastic layer (4) . 7. Ecran selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend en outre un film d'étanchéité complémentaire disposé contre la face externe de la couche structurelle (2). 30 7. Screen according to any one of claims 1 to 6, characterized in that it further comprises a complementary sealing film disposed against the outer face of the structural layer (2). 30 8. Procédé de réalisation d'un écran selon la revendication 1, caractérisé en ce qu'il comprend les étapes suivantes : • prévoir un moule chauffé pourvu d'un poinçon et d'une matrice pourvue d'un système d'aspiration sous vide, 25 6 • disposer dans le moule un complexe comprenant deux couches de feutre, pourvues d'une résine activable par la température du moule, entre lesquelles est disposé un film (3) d'étanchéité, • réaliser une cavité de moulage par descente du poinçon, • réaliser l'aspiration de sorte à plaquer ledit film contre la couche disposée en regard de la matrice et à la comprimer pour réaliser une couche structurelle (2), l'autre couche de feutre formant couche élastique (4), • démouler l'écran (1) obtenu.10 8. A method of producing a screen according to claim 1, characterized in that it comprises the following steps: • provide a heated mold provided with a punch and a matrix provided with a vacuum suction system To provide in the mold a complex comprising two layers of felt, provided with a resin that can be activated by the temperature of the mold, between which a film (3) of sealing is placed; punch, • carry out the suction so as to press said film against the layer disposed facing the die and to compress it to produce a structural layer (2), the other layer of felt forming an elastic layer (4), • to unmold the screen (1) obtained.
FR0707892A 2007-11-09 2007-11-09 Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer Pending FR2923431A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0707892A FR2923431A1 (en) 2007-11-09 2007-11-09 Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707892A FR2923431A1 (en) 2007-11-09 2007-11-09 Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer

Publications (1)

Publication Number Publication Date
FR2923431A1 true FR2923431A1 (en) 2009-05-15

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FR0707892A Pending FR2923431A1 (en) 2007-11-09 2007-11-09 Thermal and acoustic protection screen for e.g. tunnel of motor vehicle, has porous layer, sealed film and elastic layer that are superimposed one on another, and protection layer placed with respect to structural and/or elastic layer

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107848471A (en) * 2015-05-13 2018-03-27 塞拉有限责任公司 The method for forming the plate for the sound protection being mounted opposite for the heat and sound source with vehicle
FR3081752A1 (en) * 2018-05-30 2019-12-06 Cera Aps SOUNDPROOFING SCREEN OF A UNDER-BODY VEHICLE ELEMENT

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131664A (en) * 1977-09-28 1978-12-26 Allen Industries, Inc. Method of making a multiple-density fibrous acoustical panel
US4966799A (en) * 1986-09-26 1990-10-30 Matec Holding Ag Noise-reducing structural element
EP1213187A2 (en) * 2000-12-05 2002-06-12 AAW Produktions AG Sound insulating thermal shield
EP1790532A1 (en) * 2005-11-29 2007-05-30 Centre d'etude et de recherche pour l'automobile (CERA) Sound insulating shield with integrated latching zone

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131664A (en) * 1977-09-28 1978-12-26 Allen Industries, Inc. Method of making a multiple-density fibrous acoustical panel
US4966799A (en) * 1986-09-26 1990-10-30 Matec Holding Ag Noise-reducing structural element
EP1213187A2 (en) * 2000-12-05 2002-06-12 AAW Produktions AG Sound insulating thermal shield
EP1790532A1 (en) * 2005-11-29 2007-05-30 Centre d'etude et de recherche pour l'automobile (CERA) Sound insulating shield with integrated latching zone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107848471A (en) * 2015-05-13 2018-03-27 塞拉有限责任公司 The method for forming the plate for the sound protection being mounted opposite for the heat and sound source with vehicle
FR3081752A1 (en) * 2018-05-30 2019-12-06 Cera Aps SOUNDPROOFING SCREEN OF A UNDER-BODY VEHICLE ELEMENT

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