• 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:
    A method comprising the steps of: providing a complex comprising a porous fiber-based backing layer (2), an intermediate layer (3a, 3b) of recycled material and a location layer (4) porous; arranging said complex in a thermoforming mold so as to produce a three-dimensional shell; arranging said shell in a RIM mold; injecting a precursor mixture of foam so as to form a sealed soundproofing barrier (5); said binder being incorporated in said location layer, said location layer having a basis weight of between 500 and 2000 g / m 2, said location layer further comprises: at least one low compression zone of high absorption (9) having a thickness of between 4 and 10 mm, the total minimum percentage of slightly compressed zone being 40%; optionally at least one highly compressed zone of low absorption (10), said zone having a thickness of between 1 and 3 mm.
    公开号:FR3049752A1
    申请号:FR1652992
    申请日:2016-04-05
    公开日:2017-10-06
    发明作者:Guillaume Crignon；Dominique Lemaire；Christophe Capron
    申请人:Cera APS SAS；
    IPC主号:
    专利说明:

    The invention relates to a method for manufacturing an acoustic protection panel for a motor vehicle and a panel obtained by such a method.
    It is known, in particular from document EP-2 549 474, to implement a method of manufacturing an acoustic protection panel for a motor vehicle, said method comprising the following steps: • producing a complex comprising: O a layer of porous backing, in particular non-woven base, O an intermediate acoustic absorption layer comprising a porous matrix based on flexible foam flakes, in particular derived from recycling, bound together by a binder in which particles are dispersed dense material, in particular recycled materials, with a density greater than that of said matrix, O and a place layer, in the form of a web of porous material, for protecting said intermediate layer, said web being in particular based on non-woven material Heating said complex to the melting temperature of said binder; disposing said complex once heated in a thermoforming mold so as to perform a three-dimensional shell, • after cooling, demolding said shell, • arranging said shell in a reaction injection molding mold (RIM) defining a molding cavity, said back layer being turned towards said cavity, a space being left vacant between said a backing layer and a wall of said cavity, injecting into said space a precursor mixture of foam, in particular of polyurethane, elastically compressible, so that the foam overmoulds said backing layer and said intermediate layer by penetrating it partially so to form a soundproofing acoustic barrier, • after expansion of the foam in said space, demolding said panel obtained.
    Such an embodiment makes it possible to obtain a panel having both absorption and acoustic insulation properties. The absorption is carried out by the intermediate layer, this because of the porosity of the matrix.
    As for the insulation, it is generated by the sealed barrier in combination with the mass imparted to the intermediate layer by the particles of dense material, the assembly being disposed on a foam layer resulting from the molding RIM, so as to achieve a "mass-spring" type insulation.
    However, it may be desired to produce an intermediate layer of another composition than that described above, especially for the purpose of recycling waste of various types.
    And it may be that the intermediate layer has a reduced or very low porosity, which does not give it the expected efficiency in terms of sound absorption. The invention aims to overcome this disadvantage. For this purpose, and according to a first aspect, the invention provides a method for manufacturing a motor vehicle acoustic protection panel, said method comprising the following steps: • producing a complex comprising a porous backing layer based on fibers, an intermediate layer based on recycled material and a porous location layer, said complex comprising a thermoplastic binder, • heating said complex to melting temperature of said binder, • disposing said complex once heated in a thermoforming mold so as to achieve a three-dimensional shell, • after cooling, unmolding said shell. Disposing said shell in a reaction injection molding mold (RIM) defining a molding cavity, said backing layer being turned towards said cavity, a space being left vacant between said backing layer and a wall of said cavity, Injecting into said space a precursor mixture of foam, in particular of polyurethane, which is elastically compressible, so that the foam overmoulds said backing layer by penetrating it at least partially, and possibly penetrating said intermediate layer, so as to form a barrier acoustic soundproofing membrane, • after expansion of the foam in said space, so as to form a spring layer, demold said panel obtained, said binder being incorporated in said place layer, said place layer having on said panel a weight per unit area of between 500 and 2000 g / m 2, the thermoforming of said complex being carried out in such a way that the location layer furthermore has: at least one weakly compressed zone of high absorption, so as to impart acoustic absorption properties to said location layer, the total minimum percentage of the zone being slightly compressed being 40% of the surface of said location layer, said zone having a thickness of between 4 and 10 mm, said thickness being measured according to the NF EN ISO 5084 standard with a presser foot of surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa, • optionally at least one highly compressed zone of low absorption, said zone having a thickness of between 1 and 3 mm, said thickness being measured according to standard NF EN ISO 5084 with a surface pressing foot 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa. The possible existence of at least one zone of weak absorption is linked to the fact that it may be necessary to compress the local layer locally, the compression of said layer being made for example at its periphery, at the periphery of orifices. provided to allow the passage of organs, or to allow the housing of the panel in areas where the reception space of said panel is reduced.
    The location layer may, for certain specific embodiments, not have a highly compressed zone, all of its surface then forming a zone of high absorption.
    With the proposed arrangement, the ground material recycled can bring the mass on the sealing barrier to achieve sound insulation according to a "mass-spring" principle.
    In addition, one can vary at leisure the nature of the ground material, the latter may have low porosity, since the location layer, by its characteristics, achieves the expected acoustic absorption.
    It is thus possible to carry out the recycling of very varied materials.
    According to a second aspect, the invention proposes a panel obtained by such a method. Other features and advantages of the invention will appear in the description which follows, made with reference to the attached figure which is a schematic sectional view of a panel obtained by the method of the invention according to one embodiment.
    Referring to the figures, a method for manufacturing a motor vehicle acoustic protection panel 1, said method comprising the following steps: producing a complex comprising a fiber-based porous backing layer 2, an intermediate layer 3a, 3b based on ground material recycled and a porous location layer 4, said complex comprising a thermoplastic binder, • heating said complex to melting temperature of said binder. • arranging said complex once heated in a thermoforming mold so as to produce a three-dimensional shell, • after cooling, unmolding said shell, • arranging said shell in a reaction injection molding mold (RIM) defining a molding cavity, said a backing layer being turned towards said cavity, a space being left vacant between said backing layer and a wall of said cavity; injecting into said space a precursor mixture of foam, in particular of polyurethane, which is elastically compressible, so that the foam overmoulds said backing layer by penetrating at least partially, and possibly penetrating said intermediate layer, so as to form a soundproofing waterproof barrier, • after expansion of the foam in said space, so as to form a layer 6, demolding said panel obtained, said binder being incorporated in said layer of e ndroit, said place layer having on said panel a mass per unit area of between 500 and 2000 g / m 2, the thermoforming of said complex being carried out so that said location layer furthermore has: at least one low compression zone of high absorption 9, so as to impart acoustic absorption properties to said location layer, the total minimum percentage of the zone being slightly compressed being 40% of the surface of said location layer, said zone having a thickness between 4 and 10 mm, said thickness being measured according to standard NF EN ISO 5084 with a presser foot surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa, • possibly - and effectively according to the embodiment at least one highly compressed zone of low absorption 10, said zone having a thickness of between 1 and 3 mm, said thickness being measured according to the standard NF EN ISO 5084 with a presser foot of surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa.
    As mentioned before, the location layer may, for certain specific embodiments and not shown, not have a highly compressed zone, the entire surface then forming a zone of strong absorption.
    According to one embodiment, the location layer 4 has on the panel 1 a resistance to the passage of air, measured according to ISO 9053 / method B by air flow: • between 300 and 2000 Nsm '^ in zone of high absorption 9, • between 1500 and 6000 Nsm '^ in low absorption zone 10.
    According to one embodiment, the location layer 4 is based on structural fibers, for example polyester, interconnected by binder fibers, of "two-component" type, comprising a core, for example of polyester, provided with a fusible sheath, for example co-polyester.
    According to an alternative embodiment, the binder is based on polypropylene.
    According to another embodiment, the location layer 4 is based on flakes of elastically compressible foam bonded together by binding fibers as defined above.
    In this case, it is possible to cover the place layer 4 with a protective layer, not shown, of the non-woven type of low weight per unit area, for example less than 100 g / m 2.
    According to one embodiment, the intermediate layer 3a, 3b has a weight per unit area of between 500 and 1500 g / m 2.
    According to one embodiment, the intermediate layer 3a, 3b is based on: • thermoplastic elastomer loaded with a mineral powder, • and / or fibers, • and / or polyvinyl butyral (PVB), especially from used windshields .
    According to one embodiment, the intermediate layer 3a, 3b is put in place by dusting the ground material of recycled material.
    In one embodiment, the backing layer 2 has a weight per unit area of between 50 and 200 g / m 2.
    In one embodiment, the backing layer 2 has a thickness of less than 2 mm.
    In one embodiment, the backing layer 2 is a nonwoven.
    According to one embodiment, the layers 2,3a, 3b, 4 of the complex are associated with each other by needling and / or bonding by means of the at least partial melting of the intermediate layer 3a, 3b.
    According to the embodiment shown, the complex is made so as to present in front view: a heavy area 7, high acoustic protection, comprising a first intermediate layer 3a based on recycled material millbase disposed between the place layers 4 and 2, at least one light zone 8 of low acoustic protection, said light zone; Comprising, according to the embodiment shown, a second intermediate layer 3b made of recycled material millbase disposed between said top and bottom layers, said second layer having a lower basis weight than said first layer - here because of of a smaller thickness - so as to form a light zone of the first type, • or, according to an embodiment not shown, being devoid of intermediate layer, said place and back layers being arranged one in contact with the other, so as to form a light zone of the second type.
    In one embodiment, the foam penetrates the shell on a fraction less than 25% of its thickness.
    Finally, a panel 1 made by the above-described method is described, said panel comprising: a three-dimensional shell comprising a porous fiber-based backing layer 2, an intermediate layer 3a, 3b based on a recycled material crumb and a a porous location layer 4, said location layer comprising a thermoplastic binder, said location layer having on said panel a basis weight of between 500 and 2000 g / m 2, said location layer further comprising: minus a weakly compressed area of high absorption 9, so as to impart acoustic absorption properties to said layer of place, the total minimum percentage of zone being slightly compressed being 40% of the surface of said location layer, said zone having a thickness of between 4 and 10 mm, said thickness being measured according to the NF EN ISO 5084 standard with a presser foot of surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa, O optionally at least one strongly compressed zone of low absorption 10, said zone having a thickness of between 1 and 3 mm, said thickness being measured according to the standard NF EN ISO 5084 with a presser foot surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa, • a layer of spring 6 of foam, in particular of polyurethane, elastically compressible, overmolding said backing layer by penetrating at least partially, and possibly penetrating said intermediate layer, in order to form a soundproofing barrier 5.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    A method for manufacturing a motor vehicle acoustic protection panel (1), said method comprising the following steps: producing a complex comprising a porous fiber-based backing layer (2), an intermediate layer (3a), , 3b) based on recycled material mill and a porous location layer (4), said complex comprising a thermoplastic binder, • heating said complex to melting temperature of said binder, • disposing said complex once heated in a mold of thermoforming so as to produce a three-dimensional shell, • after cooling, demolding said shell, • arranging said shell in a reaction injection molding mold (RIM) defining a molding cavity, said backing layer being turned towards said cavity, a space being left vacant between said backing layer and a wall of said cavity, injecting into said space a precursor foam mixture, polyurethane material, elastically compressible, so that the foam overmoulds said backing layer by penetrating it at least partially, and possibly penetrating said intermediate layer, so as to form a soundproofing barrier (5), • after expanding the foam in said space, so as to form a spring layer (6), demolding said panel obtained, said method being characterized in that said binder is incorporated in said place layer, said place layer having on said panel has a mass per unit area of between 500 and 2000 g / m 2, the thermoforming of said complex being such that said location layer further comprises: at least one low compression zone of high absorption (9), so as to imparting acoustic absorption properties to said location layer, the total minimum percentage of a slightly compressed zone being 40% of the area of said place layer, said zone having a thickness of between 4 and 10 mm, said thickness being measured according to the standard NF EN ISO 5084 with a presser foot surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0 , 1 kPa, • optionally at least one highly compressed zone of low absorption (10), said zone having a thickness of between 1 and 3 mm, said thickness being measured according to standard NF EN ISO 5084 with a surface pressing foot 2000+ / -20 mm 2 under a pressure of 1 +/- 0.1 kPa.
    [2" id="c-fr-0002]
    2. Method according to claim 1, characterized in that the location layer (4) has on the panel (1) a resistance to the passage of air, measured according to ISO 9053 / method B by air flow alternative: • between 300 and 2000 Nsm '^ in high absorption zone (9), • between 1500 and 6000 Nsm' ^ in low absorption zone (10).
    [3" id="c-fr-0003]
    3. Method according to one of claims 1 or 2, characterized in that the location layer (4) is based on structural fibers interconnected by binder fibers comprising a core provided with a fusible sheath or by a binder based on polypropylene.
    [4" id="c-fr-0004]
    4. Method according to one of claims 1 or 2, characterized in that the location layer (4) is based on flakes of elastically compressible foam bonded to each other by binder fibers comprising a core provided with a fusible sheath .
    [5" id="c-fr-0005]
    5. Method according to any one of claims 1 to 4, characterized in that the intermediate layer (3a, 3b) has a density of between 500 and 1500 g / m ^.
    [6" id="c-fr-0006]
    6. Method according to any one of claims 1 to 5, characterized in that the intermediate layer (3a, 3b) is based on: • thermoplastic elastomer loaded with a mineral powder. And / or fibers, and / or polyvinyl butyral (PVB).
    [7" id="c-fr-0007]
    7. Method according to any one of claims 1 to 6, characterized in that the layers (2,3a, 3b, 4) of the complex are associated together by needling and / or bonding by means of fusion, at least partial, of the intermediate layer (3a, 3b).
    [8" id="c-fr-0008]
    8. Method according to any one of claims 1 to 7, characterized in that the complex is designed to present in front view: • a heavy zone (7) of high acoustic protection, comprising a first intermediate layer ( 3a) made of recycled material milled between the place (4) and back (2) layers, • at least one light zone (8) of low acoustic protection, said light zone: • comprising a second layer intermediate (3b) based on ground material recycle disposed between said top and bottom layers, said second layer having a lower basis weight than said first layer, so as to form a light zone of first type, or without an intermediate layer, said place and back layers being arranged one in contact with the other, so as to form a light zone of the second type.
    [9" id="c-fr-0009]
    9. Method according to any one of claims 1 to 8, characterized in that the foam penetrates the shell on a fraction less than 25% of its thickness.
    [10" id="c-fr-0010]
    10. A panel made by a method according to any one of claims 1 to 9, said panel comprising: a three-dimensional shell comprising a porous layer (2) porous fiber-based, an intermediate layer (3a, 3b) to ground material base and a porous location layer (4), said location layer comprising a thermoplastic binder, said location layer having on said panel a basis weight of between 500 and 2000 g / m 2, said a location layer further comprising: O at least one weakly compressed zone of high absorption (9), so as to impart acoustic absorption properties to said location layer, the total minimum percentage of the slightly compressed zone being 40 % of the surface of said location layer, said zone having a thickness of between 4 and 10 mm, said thickness being measured according to the NF EN ISO 5084 standard with a presser foot with a surface area of 2000 +/- 20 mm e pressure of 1 +/- 0.1 kPa, O optionally at least one highly compressed zone of low absorption (10), said zone having a thickness of between 1 and 3 mm, said thickness being measured according to standard NF EN ISO 5084 with a presser foot of surface 2000 +/- 20 mm ^ under a pressure of 1 +/- 0.1 kPa, • a layer of spring (6) of foam, in particular of polyurethane, elastically compressible, overmolding said layer of backing at least partially penetrating it, and possibly penetrating said intermediate layer, so as to form a soundproofing acoustic barrier (5).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3440667A1|2019-02-13|Method for producing an acoustic panel for a motor vehicle
    EP2170576B1|2019-04-03|Moulded soundproofing component, and manufacturing method thereof
    EP3484752B1|2020-09-02|Acoustic and thermal shield for a motor vehicle
    EP2549474B1|2016-04-13|Acoustic protection shield for a motor vehicle
    EP2792550B1|2016-11-09|Soundproofing panel for the firewall of a motor vehicle
    EP3478538A1|2019-05-08|Sound protection panel for cladding a wall of an automotive vehicle
    EP3253556B1|2020-04-08|Method for producing a trim and sound protection panel for a motor vehicle
    FR2908550A1|2008-05-16|Acoustic insulation screen for being mounted on motor vehicle bulkhead, has elastic layer covered with on sealed layer to form mass-spring type isolating system, and absorbent fiber layer having compressed zones compressed to thickness
    FR3070899B1|2019-09-13|INTERIOR TRIM PANEL OF MOTOR VEHICLE
    FR3010958A1|2015-03-27|ACOUSTIC PROTECTION SCREEN FOR 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
    EP2574506A1|2013-04-03|Method for producing an acoustic shield for covering an automobile engine
    WO2017178713A1|2017-10-19|Acoustic panel for lining a wall of a motor vehicle
    FR2899171A1|2007-10-05|Motor vehicle`s sound protection and lining component e.g. boot covering table, has structure covered with porous finish layer that permits to penetrate and absorb sound waves in cavities, where cavities are filled with porous material
    EP2517871B1|2014-04-02|Method for producing a masking panel
    EP3037256A1|2016-06-29|Method for producing an interior trim panel of a motor vehicle
    WO2018127648A1|2018-07-12|Acoustic shield for a motor vehicle engine
    FR3033734A1|2016-09-23|THERMOFORMING MEMBER FOR TRIM AND ACOUSTIC PROTECTION FOR MOTOR VEHICLE
    EP3429835B1|2020-01-08|Method for producing an inner trim panel for a motor vehicle
    FR3097803A1|2021-01-01|Acoustic protection panel for motor vehicles
    EP3015315A1|2016-05-04|Motor vehicle trim element
    FR2979572A1|2013-03-08|Fabricating three-dimensional trim part of motor vehicle, comprises impregnating composition based on flexible polyurethane foam flakes with acrylic binder having thermoplastic and thermosetting phases, and placing composition in enclosure
    FR3052396A1|2017-12-15|DEVICE FOR COLLECTING AND SEPARATING WATER AND VENTILATION AIR FROM A MOTOR VEHICLE HABITACLE
    FR2936973A1|2010-04-16|PROCESS FOR MAKING A GRANULE FROM RECYCLING
    同族专利:
    公开号 | 公开日
    CN109313885A|2019-02-05|
    US20190096381A1|2019-03-28|
    EP3440667A1|2019-02-13|
    BR112018070517A2|2019-01-29|
    WO2017174913A1|2017-10-12|
    JP2019521039A|2019-07-25|
    US10909960B2|2021-02-02|
    FR3049752B1|2018-05-11|
    BR112018070535A2|2019-02-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2823357A1|2001-04-10|2002-10-11|Chenel Guy G|Flexible screen for building, has thin layer of fiber on one face of non-woven fabric, whose visible surface provides permeable layer to receive print|
    EP2549474A1|2011-07-18|2013-01-23|Centre D'etude Et De Recherche Pour L'automobile |Acoustic protection shield for a motor vehicle|
    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|FR3088235A1|2018-11-13|2020-05-15|Faurecia Automotive Industrie|METHOD FOR MANUFACTURING A MOTOR VEHICLE SOUNDPROOFING ASSEMBLY AND ASSOCIATED SOUNDPROOFING ASSEMBLY|
    WO2020260302A1|2019-06-25|2020-12-30|Treves Products, Services & Innovation|Mounting of an acoustic protection panel on a motor vehicle sheet metal panel|
    FR3111289A1|2020-06-15|2021-12-17|Treves Products, Services & Innovation|Motor vehicle interior trim sound absorbing panel|
    法律状态:
    2017-04-27| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-06| PLSC| Search report ready|Effective date: 20171006 |
    2018-04-27| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-25| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2021-04-29| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1652992A|FR3049752B1|2016-04-05|2016-04-05|METHOD FOR PRODUCING AN ACOUSTIC PROTECTION PANEL FOR A MOTOR VEHICLE|
    FR1652992|2016-04-05|FR1652992A| FR3049752B1|2016-04-05|2016-04-05|METHOD FOR PRODUCING AN ACOUSTIC PROTECTION PANEL FOR A MOTOR VEHICLE|
    BR112018070517A| BR112018070517A2|2016-04-05|2017-04-03|method to produce a soundproof panel for a motor vehicle|
    US16/091,739| US10909960B2|2016-04-05|2017-04-03|Method for producing a protective sound panel for a motor vehicle|
    EP17721768.4A| EP3440667A1|2016-04-05|2017-04-03|Method for producing an acoustic panel for a motor vehicle|
    BR112018070535A| BR112018070535A2|2016-04-05|2017-04-03|method to produce a soundproof panel for a motor vehicle|
    JP2019503790A| JP2019521039A|2016-04-05|2017-04-03|Method of manufacturing protective sound panel for automobile|
    PCT/FR2017/050772| WO2017174913A1|2016-04-05|2017-04-03|Method for producing an acoustic panel for a motor vehicle|
    CN201780029767.9A| CN109313885A|2016-04-05|2017-04-03|Manufacturing method of the manufacture for the soundproof plate of motor vehicles|
    [返回顶部]