• 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 method comprising the following steps: providing a hot compression mold, said mold comprising a matrix (2) and a punch (3) defining a mold cavity (4) sealed by closing said mold, said punch or said matrix having a face (5) provided with a graining; disposed between said matrix and said punch, in successive stack, a coating layer (6) based on non-woven, a heat-moldable structural layer (7) and a sealed thermoplastic film (8), said layer coating material being turned towards said face, said layers being at temperature allowing their molding; closing said mold to seal said cavity; applying on the side of said film a gas under pressure so as to press said film against said structural layer in order to compress it and so as to press said coating layer against said face in order to give it a graining; after eventual peripheral cutting, demold the panel (1) obtained.
    公开号:FR3032374A1
    申请号:FR1552275
    申请日:2015-03-19
    公开日:2016-08-12
    发明作者:Marc Pothier；David Drezet；Christophe Blom
    申请人:Cera APS SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to a method for producing a trim panel and / or acoustic protection for covering a motor, a passenger compartment wall or a luggage compartment wall of a motor vehicle and a panel obtained by such a device. process.
    [0002] It is known to implement a method of producing a trim panel and / or acoustic protection for covering a motor, a passenger compartment wall or a luggage compartment wall of a motor vehicle, said method comprising the following steps: - provide a layer of coating - especially non-woven base, provided with a surface graining giving it an embossed appearance, or based on carpet or fabric -, - provide a hot compression mold said mold comprising a die and a punch defining a mold cavity sealed by closing said mold; - placing between said die and said punch, in successive stack, said coating layer, a compression moldable structure layer to hot and a sealed thermoplastic film, said layers being at temperature allowing their molding, - closing said mold so as to seal said cavity, - appliq on the side of said film, pressurized gas so as to press said film against said structural layer in order to compress it, - after possible peripheral cutting, demolding the panel obtained.
    [0003] According to one embodiment, it may be provided that the film, opposite the structural layer, has a porous acoustic absorption layer, in particular in the form of a foam. The implementation of such a method provides a panel having good rigidity, provided by the structural layer.
    [0004] In the case of a coating layer based on non-woven grained, there is generally an attenuation - or a disappearance - of the graining, this due to the crushing of said layer against the mold during the setting of the gas under pressure, such attenuation - or disappearance - being accentuated in areas 5 of strong stretch of said layer. To minimize this phenomenon, it is known to use a coating layer with a large surface area, for example of the order of 220 g / m 2, the grain being formed in particular by a knitted yarn on the nonwoven.
    [0005] However, the use of such a coating does not lead to a satisfactory appearance in areas of high stretch. In addition, the coating layer has a certain complexity of implementation and the use of a large amount of raw material, which reflects significantly on its cost, and therefore that of the panel. As mentioned above, the coating may be of another nature, being in particular based on carpet or fabric.
    [0006] These coatings are inherently expensive and it may be appropriate, particularly for medium and low range vehicles, to substitute them with a less costly material which however has an advantageous appearance.
    [0007] The object of the invention is to propose a method making it possible to obtain at a lower cost a panel having a satisfactory appearance. For this purpose, and according to a first aspect, the invention provides a method of producing a trim panel and / or acoustic protection for covering a motor, a passenger compartment wall or a luggage compartment wall. of a motor vehicle, said method comprising the following steps: - providing a hot compression mold, said mold comprising a die and a punch defining a molded cavity sealed by closing said mold, said punch or said die having a face provided with a graining, - placing between said matrix and said punch, in successive stacking, a layer of non-woven coating, a heat-compression moldable structure layer 5 and a sealed thermoplastic film, said coating layer being turned towards said face, said layers being at a temperature allowing them to be molded, - closing said mold so as to seal the surface e cavity, - applying on the side of said film a gas under pressure so as to press said film against said structural layer to compress it and so as to press said coating layer against said face to give it a graining, - after possible peripheral cut, unmold the panel obtained.
    [0008] It is specified here that the fact that the layers are at a temperature which makes them moldable means that they are brought to said temperature either before or after they are put into place in the mold, depending on whether a cold or hot mold is used. With the proposed arrangement, a nonwoven is used as the coating, the graining of which is imparted by the grained mold face. This ensures the presence of homogeneous graining and perfectly marked on the coating layer.
    [0009] As a result, it is possible to use a coating layer of low mass per unit area and which has not undergone prior graining operation, in particular by means of a knitted yarn. The coating layer is therefore simplified and requires little raw material, which reduces its cost and therefore that of the panel.
    [0010] It thus advantageously replaces the coatings known from the prior art, in particular nonwovens, carpets or fabrics. According to a second aspect, the invention proposes a panel produced 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 partial sectional view of a panel being molded, said panel being arranged in a mold of hot compression. Referring to the figure, there is described a method of producing a cover panel 1 and / or acoustic protection intended to cover a motor, a cabin wall or a car baggage compartment wall, said method comprising the following steps: - providing a hot compression mold, said mold comprising a die 2 and a punch 3 defining a mold cavity 4 sealed by closing said mold, said punch or said die - in this case said punch in the embodiment shown - having a face 5 provided with a graining, - arranging between said matrix and said punch, in successive stacking, a coating layer 6 based on non-woven, a structural layer 7 able to be molded by hot compression and a sealed thermoplastic film 8, said coating layer being turned towards said face, said layers being at a temperature allowing them to be molded; e, - closing said mold so as to seal said cavity; - applying on the side of said film a gas - for example air - under pressure - for example of the order of 4 bars - so as to press said film against said layer of structure to compress it and so as to press said coating layer against said face to give it a graining, - after eventual peripheral cutting, demolding the panel 1 obtained.
    [0011] As mentioned above, the fact that the layers 6, 7 are at a temperature allowing them to be molded means that they are brought to said temperature either before or after being placed in the mold, depending on whether a mold is used. cold or hot. A panel 1 is for example a luggage cover tablet, a door trim, a luggage compartment side trim or a cover panel of the vehicle engine.
    [0012] The nonwoven forming the coating layer 6 may in particular be needle-punched, water-jet bonded or glued. In one embodiment, the layers 6, 7 and the film 8 are heated by the mold, which is maintained in particular at a temperature of the order of 200.degree. According to one embodiment, the peripheral cut can be made, not shown, by blades integrated in the mold, said blades making it possible to also perform sealing of the mold cavity 4.
    [0013] According to the embodiment shown, a porous acoustic absorption layer 9 is additionally provided on the film 8 opposite the structural layer 7. In one embodiment, the absorption layer 9 is based on foam, especially polyurethane. According to one embodiment, the absorption layer 9 has, before and after molding, a density of between 0.010 and 0.020, in particular of the order of 0.015.
    [0014] According to one embodiment, the structural layer 7 is based on mineral fibers, in particular glass fibers, or natural fibers, in particular cotton fibers, said fibers being bound together by a binder. According to other embodiments, the layer of structure is based on wood chips or recycled foam flakes bound together by a binder. In one embodiment, the binder is of a thermosetting nature, especially being a phenolic or epoxy resin. According to another embodiment, the binder is of thermoplastic nature, being in particular a polypropylene.
    [0015] According to one embodiment, the structure layer 7 has a density of between 400 and 1200 g / m 2. According to one embodiment, the structure layer 7 has after molding a thickness of between 2 and 3 mm.
    [0016] In one embodiment, the film 8 is a polyethylene / polyamide / polyethylene multilayer, the polyethylene layers forming a fusible glue at the molding temperature.
    [0017] According to one embodiment, the film 8 has a thickness of between 70 and 90 microns. According to one embodiment, the coating layer 6 is based on synthetic fibers, especially based on polyethylene terephthalate.
    [0018] According to one embodiment, the coating layer 6 has a basis weight of less than or equal to 80 g / m 2, in particular being less than or equal to 40 g / m 2. The implementation of a coating layer 6 having such a low surface mass contributes to obtaining a panel 1 of minimized manufacturing cost.
    [0019] Of course, the coating layer 6 may have a greater weight per unit area, for example of the order of 100 or 200 g / m 2. We now describe a panel 1 covering and / or acoustic protection, 5 made by such a method, for covering a motor, a passenger compartment wall or a luggage compartment wall of a motor vehicle, said panel comprising successively a layer of coating 6 based on nonwoven grained, a layer of thermocompromised structure 7 and a sealed thermoplastic film 8, said coating layer having a basis weight of less than or equal to 80 g / m 2, being in particular less than or equal to 40 g / m2. According to the embodiment shown, the panel 1 further comprises, disposed on the film 8, opposite the structural layer 7, a porous acoustic absorption layer 9, said absorption layer being in particular based on foam, Especially polyurethane.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A method of producing a covering panel (1) and / or acoustic protection intended to cover a motor, a passenger compartment wall or a luggage compartment wall of a motor vehicle, said method comprising the following steps: a hot compression mold, said mold comprising a matrix (2) and a punch (3) defining a mold cavity (4) sealed by closing said mold, said punch or said die having a face (5) provided with a graining, - placing between a said matrix and said punch, in successive stack, a coating layer (6) based on non-woven material, a structural layer (7) capable of being molded by hot compression and a film (8). ) sealed thermoplastic, said coating layer being turned towards said face, said layers being at temperature allowing their molding, - closing said mold so as to seal said cavity, - applying on the side of said film a pressurized gas so as to press said film against said structural layer in order to compress it and so as to press said coating layer against said face in order to give it a graining, - after possible peripheral cutting, demolding the panel (1) obtained .
    [0002]
    2. Method according to claim 1, characterized in that it also has on the film (8), opposite the structural layer (7), a porous acoustic absorption layer (9).
    [0003]
    3. Method according to claim 2, characterized in that the absorption layer (9) is based on foam, especially polyurethane. 3032374 9
    [0004]
    4. Method according to one of claims 2 or 3, characterized in that the absorption layer (9) has, before and after molding, a density between 0.010 and 0.020, in particular of the order of 0.015. 5
    [0005]
    5. Method according to any one of claims 1 to 4, characterized in that the structural layer (7) is based on mineral fibers, especially glass fibers, or natural fibers, especially cotton, or based on of wood chips or recycled foam flakes, said fibers, chips or flakes being bonded together by a binder. 10
    [0006]
    6. Method according to claim 5, characterized in that the binder is thermosetting in nature, being in particular a phenolic resin or epoxy, or thermoplastic nature, being in particular a polypropylene 15
    [0007]
    7. Method according to any one of claims 1 to 6, characterized in that the coating layer (6) is based on synthetic fibers, especially based on polyethylene terephthalate.
    [0008]
    8. Method according to any one of claims 1 to 7, characterized in that the coating layer (6) has a basis weight less than or equal to 80 g / m2, being in particular less than or equal to 40 g / m2.
    [0009]
    9. Panel (1) covering and / or acoustic protection intended to cover a motor, a passenger compartment wall or a luggage compartment wall of a motor vehicle made by a method according to claim 8, said panel comprising successively a grained nonwoven coating layer (6), a thermocompressed structure layer (7) and a sealed thermoplastic film (8), said coating layer having a basis weight of less than or equal to 80 g / m2, being especially less than or equal to 40 g / m2.
    [0010]
    10. Panel (1) according to claim 9, when it is attached to claim 2, characterized in that it further comprises, disposed on the film 3032374 (8), opposite the structural layer ( 7), a porous acoustic absorption layer (9), said absorption layer being especially based on foam, in particular polyurethane.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3253556B1|2020-04-08|
    WO2016124830A1|2016-08-11|
    CN107666998B|2020-01-07|
    KR20180015110A|2018-02-12|
    FR3032373B1|2017-03-03|
    CN107666998A|2018-02-06|
    FR3032374B1|2017-03-24|
    ES2804842T3|2021-02-09|
    EP3253556A1|2017-12-13|
    FR3032373A1|2016-08-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5908524A|1995-07-27|1999-06-01|Sumitomo Chemical Co., Ltd|Method for producing fiber-reinforced thermoplastic resin molded article laminated with skin material|
    WO1998030388A1|1997-01-10|1998-07-16|Ekendahl Lars O|Forming a molded multilayer structure|
    US20090324901A1|2008-06-25|2009-12-31|Toyota Boshoku Kabushiki Kaisha|Interior material article for automobile|
    US20130309464A1|2012-05-03|2013-11-21|Roechling Automotive AG&Co. KG|Multilayer component and method for producing the same|
    FR2941885B1|2009-02-09|2011-04-08|Cera|METHOD FOR MAKING A VEHICLE AUTOMOTIVE|
    TWI363689B|2010-05-24|2012-05-11|Chenming Mold Ind Corp|Apparatus and system of uniform pressure for shaping|
    FR2986207B1|2012-01-26|2014-02-21|Faurecia Automotive Ind|MOTOR VEHICLE EQUIPMENT PIECE AND ASSOCIATED MOTOR VEHICLE|
    CN202573187U|2012-03-20|2012-12-05|浙江吉利汽车研究院有限公司|Automotive acoustic liner|
    CN103692990B|2013-12-16|2016-08-17|浙江华江科技股份有限公司|A kind of high-performance passenger vehicle bottom backplate light fibre strengthens thermoplastic sheet and preparation technology thereof|FR3049894B1|2016-04-12|2018-05-18|Treves Products, Services & Innovation|METHOD FOR MAKING AN INSONORIZING INTERIOR TRIM PANEL OF A MOTOR VEHICLE|
    US10927543B2|2017-06-19|2021-02-23|The Boeing Company|Acoustic attenuation structure|
    FR3085223B1|2018-08-27|2020-08-21|Arianegroup Sas|ACOUSTIC MITIGATION PANEL WITH IMPROVED PERFORMANCE AT LOW AND MEDIUM FREQUENCIES|
    FR3092537B1|2019-02-08|2021-05-21|Treves Products Services & Innovation|Acoustic protection screen for motor vehicle engine compartment|
    法律状态:
    2016-03-14| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-12| PLSC| Search report ready|Effective date: 20160812 |
    2017-03-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-30| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-30| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-29| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550926A|FR3032373B1|2015-02-05|2015-02-05|METHOD FOR PRODUCING AN ACOUSTIC PROTECTION PANEL FOR COVERING A MOTOR VEHICLE ENGINE|EP16702178.1A| EP3253556B1|2015-02-05|2016-01-07|Method for producing a trim and sound protection panel for a motor vehicle|
    CN201680014018.4A| CN107666998B|2015-02-05|2016-01-07|Method for manufacturing a sound-insulating interior panel for a motor vehicle and sound-insulating interior panel obtained|
    PCT/FR2016/050030| WO2016124830A1|2015-02-05|2016-01-07|Method for producing a trim and sound protection panel for a motor vehicle|
    KR1020177024987A| KR20180015110A|2015-02-05|2016-01-07|Method for manufacturing automotive trim and soundproof panel|
    ES16702178T| ES2804842T3|2015-02-05|2016-01-07|Procedure for creating a covering and acoustic protection panel for a motor vehicle|
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