• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a screen (1) comprising: a porous thermo-compressed three-dimensional shell (2) based on glass fibers, said fibers being interconnected by a bonding agent; an inner foam-based spring layer (3), said screen further having the following characteristics: said layer is derived from injection-reaction molding (RIM), said layer overmolding said shell; said shell has a porosity arranged to allow said foam to penetrate a fraction (4) of the thickness of said shell, so as to create a skin (5) sealed; the binding agent is based on polypropylene; the shell (2) comprises between 45 and 55% by weight of glass fibers.
    公开号:FR3053943A1
    申请号:FR1656698
    申请日:2016-07-12
    公开日:2018-01-19
    发明作者:Stephane Ribes；Christophe Capron
    申请人:Cera APS SAS；
    IPC主号:
    专利说明:

    ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY
    COURBEVOIE © Publication number:
    (only to be used for reproduction orders) © National registration number
    053 943
    56698 © IntCI 8 : B 60 R 13/08 (2017.01)
    PATENT INVENTION APPLICATION
    A1
    ®) Date of filing: 12.07.16. (© Applicant (s): CERA APS Société par actions simpli- (30) Priority: trusted - FR. @ Inventor (s): RIBES STEPHANE and CAPRON CHRISTOPHE. (43) Date of public availability of the request: 19.01.18 Bulletin 18/03. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents (® Holder (s): CERA APS Société par actions simpli- related: trusted. ©) Extension request (s): (© Agent (s): STRATO-IP Limited liability company.
    (M / ACOUSTIC AND THERMAL PROTECTION SCREEN FOR MOTOR VEHICLE.
    FR 3 053 943 - A1 _ The invention relates to a screen (1) comprising: a three-dimensional porous shell (2) thermo-compressed based on glass fibers, said fibers being connected together by a bonding agent; an internal spring layer (3) based on foam, said screen further having the following characteristics: said layer comes from injection-reaction molding (RIM), said layer overmolding said shell; said shell has a porosity arranged to allow said foam to penetrate a fraction (4) of the thickness of said shell, so as to create a waterproof skin (5); the bonding agent is based on polypropylene; the shell (2) comprises between 45 and 55% by weight of glass fibers.
    Z, t

    The invention relates to an acoustic and thermal protection screen for a motor vehicle, an assembly of such a screen and a method of producing such a screen.
    It is known to produce an acoustic and thermal protection screen for a motor vehicle, said screen comprising:
    • a thermo-compressed porous three-dimensional shell based on glass fibers, said fibers being connected together by a thermosetting bonding agent, such as a phenolic resin, • an internal spring layer based on foam - in particular polyurethane - elastically compressible, said screen further having the following characteristics:
    • said layer comes from injection-reaction molding (RIM), said layer overmolding said shell, • said shell has a porosity arranged to allow said foam to penetrate a fraction of the thickness of said shell, so as to create a waterproof skin, so that said screen:
    o either acoustically insulating according to a spring-mass principle, said screen further having sound absorption properties imparted by the fraction of thickness of said shell not penetrated by said foam and remaining porous, o its stiffness increased by reinforcement provided by said fibers coated by said foam.
    Such an arrangement makes it possible to minimize the weight of the screens, in order to lighten the vehicles.
    Indeed, it is possible to provide for the use of a shell of lower areal mass without degrading the rigidity of the screen, this by the reinforcement provided by glass fibers - well known for their use as reinforcing fibers in composite materials - coated with foam in the thickness fraction of the shell penetrated by said foam.
    Furthermore, the spring layer can be easily shaped, since it is obtained by molding, according to complex geometries - in particular non-developable - as can be found for certain components - such as an oil tank or a box. speed - to be protected by the screen.
    Therefore, the appearance face of the spring layer can be shaped so as to closely match the shape of a wall of the component to be protected, which ensures optimization of the acoustic and thermal insulation provided by the screen.
    Finally, a seal between the shell and the spring layer is ensured by the penetration of the foam into a fraction of the thickness of the shell.
    In this way, such a screen is able to provide acoustic protection by insulation according to a spring-mass principle, the fraction of thickness of the shell not impregnated with the foam also making it possible to achieve acoustic absorption.
    In addition, such a screen is able to provide thermal protection which can in particular be sought when it is desired to confine heat for a certain period around the component to be protected, this in particular when it is desired to rapidly restart the vehicle after its engine was stopped.
    However, the use of a binder of thermosetting nature has a serious drawback in that the shell has a low capacity for deformation.
    As a result, it risks breaking during the screen mounting operation on a component to be protected by said screen.
    In addition, the cutting operations on the shell are made difficult because of its brittle nature and the fouling of the cutting tools by the thermosetting binder.
    Finally, we observe in such screens a difficulty in controlling the fraction of shell thickness penetrated by the foam, the risk being of having an excessively large fraction which could harm the sound absorption properties of the screen linked to the porosity of the fraction of thickness not penetrated by the foam.
    The object of the invention is to overcome these drawbacks.
    To this end, and according to a first aspect, the invention proposes an acoustic and thermal protection screen for a motor vehicle, said screen comprising:
    • a three-dimensional porous thermo-compressed shell based on glass fibers, said fibers being connected together by a bonding agent, • an internal spring layer based on foam - in particular polyurethane - elastically compressible, said screen also having the following features:
    • said layer comes from injection-reaction molding (RIM), said layer overmolding said shell, • said shell has a porosity arranged to allow said foam to penetrate a fraction of the thickness of said shell, so as to create a waterproof skin, so that said screen:
    o either acoustically insulating according to a spring-mass principle, said screen further having sound absorption properties imparted by the fraction of thickness of said shell not penetrated by said foam and remaining porous, o its stiffness increased by reinforcement provided by said fibers coated with said foam, • the bonding agent is based on polypropylene, • the shell comprises between 45 and 55% by weight of glass fibers.
    With the proposed arrangement, the screen has, by the thermoplastic nature of the bonding agent, a good ability to deform without breaking the shell.
    As a result, the risk of the shell breaking during assembly of the screen is eliminated.
    In addition, any cutting operations on the hull are facilitated.
    The Applicant has also observed that the fact that the shell comprises between 45 and 55% by weight of glass fibers, makes it possible to achieve optimal penetration of the foam within the shell, a fraction of sufficient thickness of said shell remaining free foam, which allows the screen to have satisfactory sound absorption properties.
    According to other aspects, the invention proposes a mounting of such a screen and a method of manufacturing such a screen.
    Other features and advantages of the invention will appear in the following description, made with reference to the attached figure which is a schematic sectional view of a mounting of a screen, according to one embodiment, on a component to be protected.
    With reference to the figure, a screen 1 for acoustic and thermal protection for a motor vehicle is described, said screen comprising:
    • a thermo-compressed porous three-dimensional shell 2 based on glass fibers, said fibers being connected together by a bonding agent, • an internal spring layer 3 based on foam - in particular polyurethane - elastically compressible, said screen having in addition to the following features:
    • said layer comes from injection-reaction molding (RIM), said layer overmolding said shell, • said shell has a porosity arranged to allow said foam to penetrate a fraction 4 of the thickness of said shell, so as to create a waterproof skin 5, so that said screen:
    o either acoustically insulating according to a spring-mass principle, said screen further having sound absorption properties imparted by the fraction of thickness of said shell not penetrated by said foam and remaining porous, o its stiffness increased by reinforcement provided by said fibers coated with said foam, • the bonding agent is based on polypropylene, • the shell 2 comprises between 45 and 55% by weight of glass fibers.
    According to one embodiment, the skin 5 has a thickness of between 0.3 and 1 mm.
    The shell 2 can typically have a thickness of between 2 and 3 mm.
    According to one embodiment, the bonding agent is derived from polypropylene particles, so as to bond the fibers together according to a multiplicity of bonding points, as will be explained below.
    We will now describe an assembly of such a screen 1, said assembly comprising said screen and a component 6 to be protected, said component - for example in the form of an oil tank or gearbox - being delimited by a wall 7, in particular in sheet metal, the aspect face 8 of the spring layer 3 being shaped so as to substantially match the shape of said wall, so as to allow optimization of the acoustic and thermal insulation.
    Finally, a method of producing such a screen 1 is described, said method comprising the following successive steps:
    • making a mixture of glass fibers and polypropylene particles, the percentage by weight of said fibers relative to the total weight of said fibers and particles being between 45 and 55%, said mixture being dispersed in a liquid matrix, • making with said mixture dispersed in said matrix a fibrous web unwound continuously, • passing said web through an oven so as to evaporate said matrix and carrying out the melting of said particles, in order to have a dry web, • performing a calendering of said web dries so as to compress it and to associate said fibers with one another by the polypropylene once cooled forming a bonding agent, • produce from a blank of said compressed sheet, by compression between two walls of a hot compression mold , a thermo-compressed porous three-dimensional shell 2 based on said glass fibers, said fibers being interconnected by polypropylene, • place said shell against a mold wall for reaction injection (RIM), the aspect face 9 of said shell being turned towards said wall, • inject on said shell, within the molding cavity defined by said mold, a mixture of foam precursor - in particular polyurethane - elastically compressible, • after expansion of said foam, unmold the screen 1 obtained.
    Such a process is a realization by "papermaking", with reference to the dispersion of the fiber / particle mixture in a liquid matrix which is then eliminated.
    The advantage of such a process, compared to another way of proceeding consisting in carrying out a co-needling of glass fibers with polypropylene fibers intended to form a bonding agent after their fusion, is to allow a bonding of the fibers between them according to a multiplicity of connection points.
    This results in the formation of a dry sheet, and subsequently of a shell 2, having greater rigidity than if it were obtained by the above-mentioned process involving co-needling.
    In this way, the stiffening of the screen 1 brought by partial penetration of foam into the shell 2 is improved, knowing that said screen nevertheless retains sufficient flexibility to be able to be mounted or provided with cutouts without resulting in deterioration.
    According to one embodiment, the shell 2 is obtained from a dry sheet having a surface mass of between 500 and 800 g / m 2 , knowing that, in the prior art, it is possible to start from a sheet having a areal mass of the order of 1000 g / m 2 or more.
    权利要求:
    Claims (6)
    [1" id="c-fr-0001]
    1. Screen (1) for acoustic and thermal protection for a motor vehicle, said screen comprising:
    • a three-dimensional porous shell (thermo-compressed based on glass fibers, said fibers being linked together by a bonding agent), • an internal spring layer (3) based on foam - in particular polyurethane - elastically compressible, said screen further having the following characteristics:
    • said layer comes from injection-reaction molding (RIM), said layer overmolding said shell, • said shell has a porosity arranged to allow said foam to penetrate a fraction (4) of the thickness of said shell, so creating a waterproof skin (5), so that said screen:
    o either acoustically insulating according to a spring-mass principle, said screen further having sound absorption properties imparted by the fraction of thickness of said shell not penetrated by said foam and remaining porous, o its stiffness increased by reinforcement provided by said fibers coated with said foam, said screen being characterized in that:
    • the bonding agent is based on polypropylene, • the shell (2) comprises between 45 and 55% by weight of glass fibers.
    [2" id="c-fr-0002]
    2. Screen according to claim 1, characterized in that the skin (5) has a thickness of between 0.3 and 1 mm.
    [3" id="c-fr-0003]
    3. Screen according to one of claims 1 or 2, characterized in that the bonding agent is derived from polypropylene particles, so as to ensure a bonding of the fibers together according to a multiplicity of bonding points.
    [4" id="c-fr-0004]
    4. Mounting of a screen according to any one of claims 1 to 3, said mounting comprising said screen and a component (6) to be protected, said component being delimited by a wall (7), the aspect face (8 ) of the spring layer (3) being shaped so as to substantially match the shape of said wall, so as to allow optimization of the acoustic and thermal insulation.
    [5" id="c-fr-0005]
    5. Method for producing a screen according to claim 3, characterized in that it comprises the following steps:
    • making a mixture of glass fibers and polypropylene particles, the percentage by weight of said fibers relative to the total weight of said fibers and particles being between 45 and 55%, said mixture being dispersed in a liquid matrix, • making with said mixture dispersed in said matrix a fibrous web unwound continuously, • passing said web through an oven so as to evaporate said matrix and carrying out the melting of said particles, in order to have a dry web, • performing a calendering of said web dries so as to compress it and to associate said fibers with one another by the polypropylene once cooled forming a bonding agent, • produce from a blank of said compressed sheet, by compression between two walls of a hot compression mold , a three-dimensional porous thermo-compressed shell (2) based on said glass fibers, said fibers being connected between them es by polypropylene, • place said shell against a mold wall for reaction injection (RIM), the appearance face (9) of said shell being turned towards said wall, • inject on said shell, within the cavity of molding defined by said mold, a precursor mixture of foam - in particular polyurethane - elastically compressible, • after expansion of said foam, unmold the screen (1) obtained.
    [6" id="c-fr-0006]
    6. Method according to claim 5, characterized in that the shell (2) is obtained from a dry sheet having a surface mass of between 500 and 800 g / m 2 .
    1/1 · / 'X s
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3053943A1|2018-01-19|ACOUSTIC AND THERMAL PROTECTION SCREEN FOR MOTOR VEHICLE
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    EP2670590B1|2014-12-17|Structural part of a motor vehicule and method for making the same
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    FR3070899B1|2019-09-13|INTERIOR TRIM PANEL OF MOTOR VEHICLE
    EP2792550B1|2016-11-09|Soundproofing panel for the firewall of a motor vehicle
    FR2983148A1|2013-05-31|Acoustic protection component for car, has high surface density sealing layer made of polyvinyl butyral and placed on elastically compressible layer, where layers respectively form mass and spring of mass-spring type insulation system
    FR3031944A1|2016-07-29|ACOUSTIC PROTECTION PANEL FOR MOTOR VEHICLE MOTOR
    EP1951509B1|2017-08-23|Composite part incorporating a mechanically reinforcing complex and method of producing such part
    FR3049752A1|2017-10-06|METHOD OF MANUFACTURING AN ACOUSTIC PROTECTION PANEL FOR A MOTOR VEHICLE
    EP3442831A1|2019-02-20|Method for producing a soundproofing trim panel for the interior of a motor vehicle
    FR2890893A1|2007-03-23|MOTOR VEHICLE PART COMPRISING AN ALVEOLAR SOUL AND A SKIN
    FR2980734A1|2013-04-05|METHOD FOR PRODUCING AN ACOUSTIC PROTECTION SCREEN FOR COVERING A MOTOR VEHICLE ENGINE
    FR2987326A1|2013-08-30|ACOUSTIC PROTECTION DISPLAY TO BE PROVIDED IN RELATION TO A MOTOR VEHICLE ENGINE
    FR3054166A1|2018-01-26|METHOD FOR PRODUCING A FILLING MEMBER AND ACOUSTIC PROTECTION OF A WALL OF A MOTOR VEHICLE
    EP1470545B1|2007-08-08|Sealing and sound-proofing panel for a motor vehicle
    FR3030429A1|2016-06-24|AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL
    WO2017178717A1|2017-10-19|Method for producing a soundproofing trim panel for the interior of a motor vehicle
    EP3658418A1|2020-06-03|Acoustic protection cover for motor vehicle engine
    FR2900875A1|2007-11-16|Thermal protection screen for motor vehicle, has porous support layer partially covered by thermal protection layer on one of its sides, where protection layer has ceramic resin which has load dispersed in resin, and absorption layer
    EP3925755A1|2021-12-22|Soundproofing panel for the interior trim of a motor vehicle
    FR2499086A1|1982-08-06|THERMALLY INSULATING COMPOSITION AND METHOD OF MANUFACTURING THE SAME
    EP2865506B1|2017-04-05|Motor vehicle component made of moulded thermoplastic material
    EP3747640A1|2020-12-09|Method for manufacturing a part for a motor vehicle and associated vehicle part
    同族专利:
    公开号 | 公开日
    EP3484752A1|2019-05-22|
    US20190241133A1|2019-08-08|
    CN109843651A|2019-06-04|
    WO2018011506A1|2018-01-18|
    FR3053943B1|2018-08-31|
    EP3484752B1|2020-09-02|
    ES2835100T3|2021-06-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2792550A2|2013-04-17|2014-10-22|Centre D'etude Et De Recherche Pour L'automobile |Soundproofing panel for the firewall of a motor vehicle|
    FR3010958A1|2013-09-26|2015-03-27|Cera|ACOUSTIC PROTECTION SCREEN FOR MOTOR VEHICLE|
    FR3030429A1|2014-12-22|2016-06-24|Centre D'etude Et De Rech Pour L'automobile |AUTOMOTIVE VEHICLE INTERIOR CLOSURE PANEL|
    WO1998018656A1|1996-10-29|1998-05-07|Rieter Automotive Ag|Ultralight, multifunctional, sound-insulating material assembly|
    DE19904986A1|1999-02-08|2000-08-10|Benien Produktionstechnik Gmbh|Sound absorbent cover, e.g. for engine compartment of vehicle, comprises two outer layers and a center layer of foam joined by hot pressing in mold|
    KR100882649B1|2007-11-19|2009-02-06|현대자동차주식회사|Ceiling interior materials for a vehicle and method of manufacture thereof|
    FR2942437B1|2009-02-20|2012-08-24|Faurecia Automotive Ind|SOUNDPROOFING ASSEMBLY FOR MOTOR VEHICLE AND ASSOCIATED WALL ELEMENT.|FR3081752B1|2018-05-30|2020-09-04|Cera Aps|SOUNDPROOFING SCREEN OF A MOTOR VEHICLE UNDERBODY ELEMENT|
    EP3921208A1|2019-02-08|2021-12-15|Treves Products, Services & Innovation|Sound protection screen for a motor vehicle engine compartment|
    FR3094934B1|2019-04-12|2021-05-14|Treves Products Services & Innovation|Acoustic protection screen for motor vehicle engine compartment|
    FR3095367B1|2019-04-23|2021-05-14|Treves Products Services & Innovation|Method for producing a motor vehicle engine cover screen|
    FR3100769A1|2019-09-12|2021-03-19|Treves Products, Services & Innovation|Acoustic protection screen for motor vehicle engine compartment|
    FR3101567A1|2019-10-08|2021-04-09|Treves Products, Services & Innovation|Process for making an acoustic protection panel for a motor vehicle|
    法律状态:
    2017-07-31| PLFP| Fee payment|Year of fee payment: 2 |
    2018-01-19| PLSC| Publication of the preliminary search report|Effective date: 20180119 |
    2018-07-30| PLFP| Fee payment|Year of fee payment: 3 |
    2019-07-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-07-24| PLFP| Fee payment|Year of fee payment: 5 |
    2021-07-26| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1656698A|FR3053943B1|2016-07-12|2016-07-12|ACOUSTIC AND THERMAL PROTECTION SCREEN FOR MOTOR VEHICLE|FR1656698A| FR3053943B1|2016-07-12|2016-07-12|ACOUSTIC AND THERMAL PROTECTION SCREEN FOR MOTOR VEHICLE|
    ES17748826T| ES2835100T3|2016-07-12|2017-07-10|Acoustic and thermal protection screen for motor vehicle|
    EP17748826.9A| EP3484752B1|2016-07-12|2017-07-10|Acoustic and thermal shield for a motor vehicle|
    PCT/FR2017/051889| WO2018011506A1|2016-07-12|2017-07-10|Acoustic and thermal shield for a motor vehicle|
    CN201780043047.8A| CN109843651A|2016-07-12|2017-07-10|Heat-insulating sound-insulating screen for motor vehicles|
    US16/317,302| US20190241133A1|2016-07-12|2017-07-10|Acoustic and thermal shield for a motor vehicle|
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