WO2014040685A1 - Composant structurel extérieur pour véhicule automobile et procédé de fabrication - Google Patents

Composant structurel extérieur pour véhicule automobile et procédé de fabrication Download PDF

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Publication number
WO2014040685A1
WO2014040685A1 PCT/EP2013/002473 EP2013002473W WO2014040685A1 WO 2014040685 A1 WO2014040685 A1 WO 2014040685A1 EP 2013002473 W EP2013002473 W EP 2013002473W WO 2014040685 A1 WO2014040685 A1 WO 2014040685A1
Authority
WO
WIPO (PCT)
Prior art keywords
structural component
exterior structural
exterior
plastic
tool
Prior art date
Application number
PCT/EP2013/002473
Other languages
German (de)
English (en)
Inventor
Christian Neuschl
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2014040685A1 publication Critical patent/WO2014040685A1/fr

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Classifications

    • 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
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/305—Spray-up of reinforcing fibres with or without matrix to form a non-coherent mat in or on a mould
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the invention relates to a motor vehicle exterior structural component made of glass fiber reinforced plastic and a method for producing such a motor vehicle exterior structural component.
  • GRP glass fiber reinforced plastic
  • SMC Sheet Molding Compound
  • RTM Resin Transfer Molding
  • a radar sensor in the front of the vehicle for an Active Brake Assistant attenuate the embedded glass fibers radar radiation significantly, so that the function of the sensor is adversely affected. Due to the strong damping properties, the material thickness of the fiberglass component is then in the area in front of the sensor only in a very narrow
  • One way to increase the transmissivity of the exterior structural component for radar radiation is to vary the fraction of fibers in the exterior structural component.
  • methods and different compositions are known from the prior art.
  • DE 10 2007 051 129 A1 discloses a device and a method for producing reinforced polyurethane composite materials.
  • a polyurethane spray mixing head with a defined spray direction and at least one applicator organ to directed application of fibers described, wherein the exit direction of the fibers relative to the spray direction of the spray mixing head is spatially changeable.
  • the method provides web-controlled fiber application.
  • DE 10 2006 046 130 A1 describes a process for the production of a coated planar element by the LFI process (Long Fiber Injection), in which a coating-forming element is placed in a mold and the coating-forming element with a still unreacted polyurethane material is coated. To avoid bending or deformation of the sheet-like element, it is proposed that in different layers, the amount or
  • composition of the polyurethane entry is changed.
  • the proportion of glass fibers is between 10% and 70%.
  • a support structure includes a fiber reinforced plastic support plate, the fibers being in a different density and in different areas, such as high stress locations.
  • the supporting structure is made of many
  • EP 1 331 164 B1 describes a composite component for a vehicle body, in particular a vehicle roof, in which, with a fiber-free outer skin and a fiber-reinforced carrier structure, which is applied to the inside of the outer skin to reinforce the outer skin, an interface layer in the carrier structure is trained. Within the boundary layer, the fiber content is increased with respect to the area of the support structure lying outside the boundary layer.
  • Radomes are usually injection molded components and consist, for example, of polycarbonate. These often have more favorable material properties in terms of Radar permeability and are subsequently used manually in the GRP structural components. This results in additional expenses, such as increased assembly costs, additional costs for development, tools and components.
  • joints are visible around the radome, which indicate the position of the sensors and affect the appearance of the structural component to the outside.
  • the invention relates to a motor vehicle exterior structural component made of fiberglass-reinforced plastic with sections of varying glass fiber portions for a motor vehicle with at least one radar sensor, wherein the exterior structural component has at least one integral section with radome properties.
  • the integral portion is in this case integrally and seamlessly connected to the surrounding exterior structural component material and as such part of the exterior structural component. Further, the integral portion has a glass fiber portion such that it is low in fiber relative to the surrounding exterior structural component material.
  • the invention particularly preferably provides that the integral portion may have a glass fiber content of less than 5%, even less than 2%.
  • the integral portion may have a glass fiber content of less than 5%, even less than 2%.
  • the exterior structural component material surrounding the integral section has a glass fiber content in a range of 10% to 70%, preferably in a range of 20% to 50%.
  • the exterior structural component can thus be used as a joint-free large component in front of the radar sensor and has a high glass content with very low radar attenuation values.
  • Glass fibers in the plastic can be homogeneous.
  • the homogeneous design favors a particularly stable structural component.
  • the integral portion and the surrounding exterior structural component material may each have a constant material thickness, so that the component has a high strength over its entire area, or is stable in all areas.
  • the exterior structural component according to the invention can thus be used, for example, in front of a radar sensor in a vehicle front as a Bug logo carrier with an area of up to 1500 mm ⁇ 300 mm, with a high proportion of glass fiber.
  • the region that is to say at least the integral section directly in front of the radar sensor, can be formed with a low glass fiber content up to an area of for example 150 mm ⁇ 200 mm, without the component as a whole losing noticeably in terms of stability or the positive properties caused by the glass fibers
  • the method according to the invention for producing a motor vehicle exterior structural component made of glass-fiber reinforced plastic preferably comprises the steps:
  • one-piece components are inexpensive to produce, the costs are also influenced by lower investment costs for tools in addition to a component reduction, since no radomes are more necessary than separately used components.
  • Already existing tools can be used.
  • Separate tools for the production of radomes or special punching or assembly tools can also be saved.
  • the exterior structural component can be designed joint-free and the component can still be made of fiberglass with high glass content and its many positive material properties.
  • sprayable plastics which preferably contain polyurethane.
  • other sprayable plastics suitable for producing a GRP material may also be used.
  • LFI Long Fiber Injection
  • PUR spray process technology with LFI can be used.
  • Spray device can be moved to the uniform application of the components parallel spaced over the tool surface.
  • the control of the different sections via a programming of the control unit.
  • the amount or the output rate of the plastic or the Glasmaschineanteils be controlled by programming the spray and cutting head.
  • the material thickness is subject to a wider tolerance window, which is reflected positively in the component costs.
  • the process according to the invention can also be used for in-mold coating processes, as described in DE 10 2010 048 077 A1.
  • the application of at least one surface layer may be provided on the tool surface, wherein the at least one surface layer preferably a
  • Lacquer layer is.
  • primers and finish lacquer systems can be introduced into the tool before production of the carrier layer and are
  • Embodiment of the invention. 1 shows a schematic view of a tool with a spraying device.
  • the invention relates to a method for producing a
  • Motor vehicle exterior structural component and an exterior structural component are Motor vehicle exterior structural component and an exterior structural component.
  • a unilaterally open tool 1 is shown, which corresponds to the manufactured exterior structural component in the negative.
  • the tool 1 has a
  • a spraying device 10 is arranged, which in each case has a first nozzle 11 directed toward the tool surface 2 and a second nozzle 12.
  • the first nozzle 11 is preceded by a spray head 13, which supplies the first nozzle 11 with a sprayable first component, which has a sprayable plastic 15, for example polyurethane (PUR).
  • the second nozzle 12 is associated with a cutting head 14 which supplies a second component to the second nozzle 12.
  • the second component consists of an embedded fiber reinforcement of glass fibers 16, which are used because of their positive material properties in conjunction with polyurethane.
  • the fibers may be in the form of monofilaments or loose pieces of fiber which, simultaneously with the plastic 15 on the
  • Tool surface 2 are applied.
  • the spray device 10 is movably mounted along the tool surface 2 and is controlled by a control unit 20.
  • the control unit 20 is designed not only to determine the position of the spray device 10 above the tool surface 2, but also to control the quantity or output rate of the two components plastic 15 and glass fibers 16 to be applied.
  • a position of an integral portion A is first determined, which has a significantly lower glass fiber content than a surrounding exterior structural component material B. Further, the dimensions of the integral portion A are determined. The position determination depends on the area that later has radome properties. Position and dimensions depend on the position of a radar sensor on the motor vehicle body, so that when mounting the finished structural component of the integral section A is arranged directly above the radar sensor. Via position sensors which are arranged above the tool 1 or at the spray device 10 (not shown) or a manual input by a user, this information is accessed and stored by the control unit 20.
  • the integral section A becomes a particular one Assigned to glass fiber content that is less than 5% and less than 2%, respectively.
  • surrounding exterior structural component material B is assigned a component necessary for the stability of the component, for example about 20%.
  • a carrier layer 3 is entered into the tool 1.
  • the carrier layer 3 is in this case formed from the sprayable plastic 15 and the glass fibers 16.
  • the LFI process Long Fiber Injection
  • PUR-LFI Long Fiber Injection
  • CSM composite spray molding
  • the cutting head 14 for example, fiber monofilaments supplied (not shown) and cut by the cutting head 14 before application to the tool surface 2 in certain lengths, which are after each to be reached fiber content in the carrier layer 3, with lengths of a few mm to a few cm
  • plastic 15 and cut glass fibers 16 takes place by spraying, wherein when sprayed on the tool surface 2, both components mix and after curing, the fiber-reinforced
  • the spray device 10 is controlled by means of the control unit 20, wherein the quantity or the output rate of components to be sprayed can be influenced in a targeted manner.
  • Plastic 15 and glass fibers 16 may be simultaneous or in time
  • Structural component material B is equal, so that the component at the transitions to
  • Section A remains stable in itself.
  • the spray device 10 is controlled such that for the integral section A of the order of the glass fibers 16 is reduced relative to the surrounding material B, wherein the glass fiber content can be reduced to about 2%.
  • the integral portion A may make an area of about 150 ⁇ 200 mm without noticeably reducing the stability of the exterior structural member. Leave the
  • the output rate of the glass fibers 16 is increased and set the glass fiber content of the exterior structural component material B again to the increased percentage.
  • the glass fiber content can also be, for example, up to 70%.
  • the integral section A after completion of the component is then regarded as having low glass fiber content. This results in an area which is more permeable to the radar waves.
  • Radar sensor can be optimized.
  • exterior structural component may be provided with a surface layer (not shown figuratively), as in DE 2010 048 077 A1 of the applicant
  • the tool surface 2 is covered with a first surface layer in the form of a lacquer layer, it being possible to use a mask which covers a region of the
  • the mask is removed and applied a second surface layer, which in turn is applied in the form of a lacquer layer.
  • the surface layers can in principle be applied using a suitable spraying device and are referred to as in-mold coating (IMC).
  • the carrier layer 3 is applied to the inside of the surface layers in the manner described above by means of the spray device 10.
  • the exterior structural component is painted the same way, with the application of the mask any number of paint layers of different colors can be applied.
  • the exterior structural component is cured, wherein the fiber-reinforced carrier layer 3 is formed.
  • the tool 1 is taken from the finished exterior structural component and is ready for assembly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Reinforced Plastic Materials (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un composant structurel extérieur pour véhicule automobile, fabriqué en matière plastique renforcée de fibres de verre avec des proportions de fibres de verre qui varient d'une portion à l'autre pour un véhicule automobile comprenant au moins un capteur radar. Le composant structurel extérieur présente comporte au moins une portion intégrée (A) ayant des propriétés de radôme, laquelle et présente présentant une proportion deteneur en fibres de verre qui est faible en fibres de verre par rapport auinférieure à celle du matériau ayant du composant structurel extérieur (B) qui l'entoure. L'invention concerne en outre un procédé pour lade fabrication d'un tel composant structurel extérieur pour véhicule automobile.
PCT/EP2013/002473 2012-09-15 2013-08-17 Composant structurel extérieur pour véhicule automobile et procédé de fabrication WO2014040685A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012018329.1A DE102012018329A1 (de) 2012-09-15 2012-09-15 Kraftfahrzeugexterieur-Strukturbauteil und Verfahren zur Herstellung
DE102012018329.1 2012-09-15

Publications (1)

Publication Number Publication Date
WO2014040685A1 true WO2014040685A1 (fr) 2014-03-20

Family

ID=49035522

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/002473 WO2014040685A1 (fr) 2012-09-15 2013-08-17 Composant structurel extérieur pour véhicule automobile et procédé de fabrication

Country Status (2)

Country Link
DE (1) DE102012018329A1 (fr)
WO (1) WO2014040685A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014208517A1 (de) * 2014-05-07 2015-11-12 Robert Bosch Gmbh Karosserieteil für ein Kraftfahrzeug
DE102021213273A1 (de) 2021-11-25 2023-05-25 Volkswagen Aktiengesellschaft Karosserie-Kunststoffbauteil-Anordnung mit Grundkörper und Folienbeschichtung sowie Verfahren zur Auslegung einer solchen Karosserie-Kunststoffbauteil-Anordnung
DE102021132798A1 (de) 2021-12-13 2023-06-15 Valeo Schalter Und Sensoren Gmbh Radarvorrichtungsanordnung für ein Fahrzeug und Verfahren zur Herstellung einer Radarvorrichtungsanordnung für ein Fahrzeug

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685056B1 (fr) 1993-02-24 1997-08-13 L. & C. Steinmüller GmbH Recepteur pour la conversion d'un rayonnement solaire concentre
EP1462817A1 (fr) * 2003-03-24 2004-09-29 Hitachi, Ltd. Radar à ondes millimétriques et son procédé de fabrication
EP1331164B1 (fr) 2002-01-25 2007-04-18 Webasto AG Elément composite pour carrosserie de véhicule, en particulier pour toit de véhicule
DE102006046130A1 (de) 2006-09-28 2008-04-03 Kraussmaffei Technologies Gmbh Verfahren zur Herstellung eines beschichteten großflächigen Formteils
DE102007051129A1 (de) 2007-10-24 2009-04-30 Bayer Materialscience Ag Vorrichtung und Verfahren zur Herstellung von verstärkten Polyurethan-Verbundmaterialen
DE102009040164A1 (de) 2009-09-04 2011-05-12 Voith Patent Gmbh Tragkonstruktion für ein Schienenfahrzeug
DE102010048077A1 (de) 2010-10-09 2012-04-12 Daimler Ag Verfahren zur Herstellung eines Formteiles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119627B (fi) * 2005-08-26 2009-01-30 Exel Oyj Menetelmä antenniradomin valmistamiseksi komposiittimateriaaleista jatkuvatoimisesti
RU2012111120A (ru) * 2009-08-26 2013-10-10 Байер Матириальсайенс Аг Усиленная волокнами полиуретановая формованная деталь с трехмерными структурами

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685056B1 (fr) 1993-02-24 1997-08-13 L. & C. Steinmüller GmbH Recepteur pour la conversion d'un rayonnement solaire concentre
EP1331164B1 (fr) 2002-01-25 2007-04-18 Webasto AG Elément composite pour carrosserie de véhicule, en particulier pour toit de véhicule
EP1462817A1 (fr) * 2003-03-24 2004-09-29 Hitachi, Ltd. Radar à ondes millimétriques et son procédé de fabrication
DE102006046130A1 (de) 2006-09-28 2008-04-03 Kraussmaffei Technologies Gmbh Verfahren zur Herstellung eines beschichteten großflächigen Formteils
DE102007051129A1 (de) 2007-10-24 2009-04-30 Bayer Materialscience Ag Vorrichtung und Verfahren zur Herstellung von verstärkten Polyurethan-Verbundmaterialen
DE102009040164A1 (de) 2009-09-04 2011-05-12 Voith Patent Gmbh Tragkonstruktion für ein Schienenfahrzeug
DE102010048077A1 (de) 2010-10-09 2012-04-12 Daimler Ag Verfahren zur Herstellung eines Formteiles

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