• 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 for producing a panel (1) comprising a self-supporting core (2) based on polyurethane foam, said core comprising a location face (3) and a back face (4), said panel further comprising a location coating layer (5) adhered to said location face, said method comprising the steps of: providing a mold comprising a die and a cap defining after closing said die a molding cavity; disposing on said matrix a wadding layer (6); injecting on said cotton wool layer a precursor mixture of rigid or semi-rigid polyurethane foam; closing said mold so as to allow said mixture to expand into said cavity; after formation of said foam, in which said layer of wadding is embedded, demolding the element obtained forming said core; adhering to said location face said location coating layer. The presence of the wadding layer (6) makes it possible to eliminate or minimize the surface defects observed on the faces (3, 4) of the core (2), by homogenizing the size of the bubbles that burst on the surface during the formation of the foam.
    公开号:FR3032375A1
    申请号:FR1550925
    申请日:2015-02-05
    公开日:2016-08-12
    发明作者:Christophe Gillet；Daniel Mezieres
    申请人:Cera APS SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to a method for producing a motor vehicle trim panel and a panel made by such a method. It is known to implement a method of producing a motor vehicle trim panel - said panel being in particular in the form of a covering shelf of a luggage compartment of said vehicle - said panel comprising a self-supporting core based on polyurethane foam, said core comprising a location face and a back face, said panel further comprising a location coating layer adhered to said location face, said method comprising the following steps: providing a mold comprising a matrix and a lid defining after closing of said mold a molding cavity, - injecting on said matrix a precursor mixture of rigid or semi-rigid polyurethane foam, - closing said mold so as to allow expansion of said mixture in said cavity, - after forming said foam, demolding the element obtained forming said core, - sticking on said surface face said layer of location coating - said layer being especially based on nonwoven, carpet or fabric. However, it is commonly observed that the core obtained by such a molding has non-smooth face and back faces, in particular having defects in the form of craters, this due to the formation of certain large bubbles that burst. surface. And the presence of the location coat layer, and possibly a back coat layer, may not be sufficient to mask the defects of the place face, and possibly the back side.
    [0002] Obtaining a panel of satisfactory appearance therefore requires a manual finishing operation of the core, consisting in particular of a filling of the 3032375 2 craters formed after the molding, which complicates its implementation and increases the cost Manufacturing. The object of the invention is to overcome this disadvantage by proposing a method 5 for eliminating - or at least minimizing - the surface defects observed on the face and back faces of the core. For this purpose, and according to a first aspect, the invention proposes a method of producing a motor vehicle trim panel - said panel being in particular in the form of a cover of a luggage compartment of said vehicle said panel comprising a self-supporting core based on polyurethane foam, said core comprising a location face and a backside face, said panel further comprising a location coating layer adhered to said location face, said method comprising the following steps: - providing a mold comprising a matrix and a lid defining after closing of said mold a molding cavity, - arranging a layer of wadding on said matrix, - injecting on said wadding layer a precursor foam mixture of rigid or semi-rigid polyurethane, - closing said mold so as to allow expansion of said mixture in said cavity, - after formation of said foam, in which is embedded in said wadding layer, demolding the obtained element forming said core, - sticking on said surface face said location coating layer, said layer being in particular based on nonwoven, carpet or fabric. By a rigid or semi rigid foam is meant a non-elastically compressible foam such as a foam used to form a seat cushion.
    [0003] Such a type of foam has in particular a density of between 0.12 and 0.16, being in particular of the order of 0.14.
    [0004] The Applicant has observed, surprisingly, that the presence of the wadding layer makes it possible to homogenize the size of the bubbles and to avoid the formation of large bubbles that burst on the surface.
    [0005] This results in obtaining a panel having a very satisfactory surface appearance, and this without manual operation of finishing the core making it more complex and costing its manufacturing cost.
    [0006] According to a second aspect, the invention proposes a panel made 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 partial schematic sectional representation of a panel made according to one embodiment. Referring to the figures, there is described a method of producing a motor vehicle trim panel 1 - said panel being in particular in the form of a cover plate of a luggage compartment of said vehicle - said panel comprising a self-supporting core 2 based on polyurethane foam, said core comprising a location face 3 and a back face 4, said panel further comprising a location coating layer 5 bonded to said location face, said method comprising the steps of: providing a mold comprising a matrix and a lid defining after closing of said mold a molding cavity; arranging on said matrix a layer of wadding 6; injecting on said wadding layer a precursor mixture of foam of rigid or semi-rigid polyurethane - said foam having in particular a density of between 0.12 and 0.16, being in particular of the order of 0.14 -, - closing said mold of mani to allow expansion of said mixture in said cavity, after formation of said foam, in which said layer of wadding is embedded, demolding the element obtained forming said core, - sticking on said face of said layer of location coating, said layer being especially based on nonwoven, carpet or fabric.
    [0007] In addition, it is possible to provide a peripheral finishing cutout for diverting excess cotton wool and / or coating. In order to lead to the panel 1 of the embodiment shown, the method furthermore provides a step of bonding a backing layer 7 - in particular in the form of a nonwoven - opposite the back 4 of the core 2. According to one embodiment, the wadding layer 6 is based on synthetic fibers, especially of polyester - or natural fibers - in particular of cotton.
    [0008] In the case of synthetic fibers, it is particularly possible to use "bicomponent" fibers having a fusible sheath at moderate temperature, the fibers being bonded together by melting said sheath.
    [0009] According to one embodiment, the wadding layer 6 has a basis weight of between 30 and 100 g / m 2, and in particular between 60 and 80 g / m 2. In particular, the wadding layer 6 has a weight per unit area of about 70 g / m 2.
    [0010] According to one embodiment, the wadding layer 6 has a thickness of between 8 and 12 mm before molding, being in particular of the order of 10 mm. In order to lead to the panel 1 according to the embodiment shown, the method furthermore provides a step of placing under the wadding layer 6, before injection of the precursor foam mixture, a layer of fibrous reinforcing material 8 of the core 2 intended to to be embedded in the foam, the location face 3 of said core being that towards which said layer of wadding is disposed.
    [0011] With such an arrangement, it is observed a suppression of the surface defects in front of location 3 and a good attenuation of defects in front of back 4.
    [0012] In one embodiment, the layer of reinforcing material 8 is based on glass fibers. We now describe a panel 1 obtained by such a method, said panel comprising a core 2 self-supporting rigid polyurethane foam 10 or sem i rigid - said foam having a particular density between 0.12 and 0.16, being in particular of the order of 0.14 -, said core comprising a location face 3 and a back face 4, said panel further comprising a location coating layer 5 bonded to said location face, said core further comprising a wadding layer 6 embedded in the foam.
    [0013] According to the embodiment shown, the panel 1 further comprises a backing layer 7 - in particular in the form of a nonwoven - bonded opposite the back 4 of the core 2.
    [0014] According to the embodiment shown, the core 2 further comprises a fibrous reinforcing material layer 8 embedded in the foam, the location coating layer 5 being disposed on the side of the batting layer 6.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A method of producing a panel (1) covering the motor vehicle - said panel being in particular in the form of a covering tablet of a luggage compartment of said vehicle - said panel comprising a core (2) free-standing base polyurethane foam, said core comprising a location face (3) and a backside face (4), said panel further comprising a location coating layer (5) adhered to said location face, said method comprising the following steps: - providing a mold comprising a matrix and a lid defining after closing of said mold a molding cavity, - arranging on said matrix a wadding layer (6), - injecting on said wadding layer a precursor mixture of rigid or semi-rigid polyurethane foam, said foam having in particular a density of between 0.12 and 0.16, being in particular of the order of 0.14, - closing said mold so as to allow the expansion of said melan ge in said cavity, - after formation of said foam, in which said wadding layer is embedded, demolding the element obtained forming said core, - sticking on said surface face said location coating layer, said layer being in particular non-woven, carpet or fabric.
    [0002]
    2. Method according to claim 1, characterized in that it further comprises a step of bonding a backing layer (7) - especially in the form of a nonwoven - opposite side (4) of the soul (2).
    [0003]
    3. Method according to one of claims 1 or 2, characterized in that the wadding layer (6) is based on synthetic fibers, especially polyester, or natural, especially cotton. 3032375 7
    [0004]
    4. Method according to any one of claims 1 to 3, characterized in that the wadding layer (6) has a basis weight of between 30 and 100 g / m2, and especially between 60 and 80 g / m2. 5
    [0005]
    5. Method according to any one of claims 1 to 4, characterized in that the wadding layer (6) has before molding a thickness of between 8 and 12 mm, being in particular of the order of 10 mm.
    [0006]
    6. Method according to any one of claims 1 to 5, characterized in that it further comprises a step of placing under the wadding layer (6), before injection of the precursor foam mixture, a layer of material fibrous reinforcement (8) of the core (2) intended to be embedded in the foam, the location face (3) of said core being that to which said layer of wadding is disposed. 15
    [0007]
    7. Method according to claim 6, characterized in that the layer of reinforcing material (8) is based on glass fibers.
    [0008]
    8. Panel made by a method according to any one of claims 1 to 7, said panel comprising a core (2) self-supporting rigid polyurethane foam or semi-rigid - said foam having in particular a density between 0.12 and 0.16, being especially of the order of 0.14 -, said core comprising a location face (3) and a backside face (4), said panel further comprising a location coating layer (5) adhered to said location face, said panel being characterized in that said core further comprises a wadding layer (6) embedded in the foam.
    [0009]
    9. Panel according to claim 8, when it is attached to claim 2, characterized in that it further comprises a backing layer 30 (7) - especially in the form of nonwoven - glued in front of (4) of the soul (2). 3032375 8
    [0010]
    10. Panel according to any one of claims 8 or 9, when it is attached to claim 6 or 7, characterized in that the core (2) further comprises a layer of fibrous reinforcing material (8) embedded in the foam, the spot coating layer (5) being disposed on the side of the batting layer (6).
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3032375B1|2017-03-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE19546097A1|1995-12-11|1997-06-12|Basf Ag|Process for the production of self-separating, compact or cellular moldings, optionally containing reinforcing agents, from polyisocyanate polyaddition products and internal mold release agents therefor|
    US6500369B1|1999-10-14|2002-12-31|Janusz P. Gorowicz|Method of making a headliner having integrated energy absorbing foam|
    DE10250023A1|2002-10-25|2004-05-06|Basf Ag|Formed part for production of roof liners for cars comprises a polyurethane matrix reinforced with embedded non-woven fabric with a certain density and basis wt. which is made from matrix fibres|
    US20090001626A1|2004-06-22|2009-01-01|Bayer Materialscience Ag|Process for the production of polyurethane molded articles|
    US20070151652A1|2005-12-19|2007-07-05|Burks Stephen R|Method for making automotive headliners|FR3070899A1|2017-09-12|2019-03-15|Cera Aps|INTERIOR TRIM PANEL OF MOTOR VEHICLE|
    EP3683043A1|2019-01-16|2020-07-22|Autoneum Management AG|Sandwich panel for a car able to carry a load|
    CN109484320A|2018-10-30|2019-03-19|格林莱特实业（苏州）有限公司|A kind of boot bottom plate for motor vehicles|
    法律状态:
    2016-02-11| PLFP| Fee payment|Year of fee payment: 2 |
    2016-08-12| PLSC| Search report ready|Effective date: 20160812 |
    2017-02-27| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-21| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-25| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-25| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550925A|FR3032375B1|2015-02-05|2015-02-05|METHOD OF MAKING A CARRIAGE PANEL OF A MOTOR VEHICLE|FR1550925A| FR3032375B1|2015-02-05|2015-02-05|METHOD OF MAKING A CARRIAGE PANEL OF A MOTOR VEHICLE|
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