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EP3772381A1 - Verfahren zur herstellung eines transparenten fahrzeugteils - Google Patents

Verfahren zur herstellung eines transparenten fahrzeugteils Download PDF

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Publication number
EP3772381A1
EP3772381A1 EP20189095.1A EP20189095A EP3772381A1 EP 3772381 A1 EP3772381 A1 EP 3772381A1 EP 20189095 A EP20189095 A EP 20189095A EP 3772381 A1 EP3772381 A1 EP 3772381A1
Authority
EP
European Patent Office
Prior art keywords
layer
varnish
transparent
paint
vehicle
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20189095.1A
Other languages
English (en)
French (fr)
Inventor
Sophie Vidal
Stéphane GUILLIER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Opmobility Se
Original Assignee
Plastic Omnium SE
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 Plastic Omnium SE filed Critical Plastic Omnium SE
Publication of EP3772381A1 publication Critical patent/EP3772381A1/de
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/56—Three layers or more
    • B05D7/57—Three layers or more the last layer being a clear coat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/06—Designs or pictures characterised by special or unusual light effects produced by transmitted light, e.g. transparencies, imitations of glass paintings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2201/00—Polymeric substrate or laminate
    • B05D2201/02—Polymeric substrate

Definitions

  • the invention relates to a part of a motor vehicle. More particularly, the invention relates to a method of manufacturing a transparent vehicle part that contributes to the exterior appearance of the vehicle.
  • a vehicle comprises several transparent parts intended to transmit light. These are in particular parts used for regulatory lighting purposes, for example those protecting the optical units of high beam and low beam or flashing lights. Furthermore, the vehicle may also have light sources provided for decorative purposes which improve the aesthetics of the vehicle.
  • an external surface of the transparent parts in order to improve their appearance.
  • One possibility for this consists in overmolding a film on the external surface of the transparent part, the film having a predefined opaque pattern. In this way, when the light source associated with the transparent piece emits light, the latter is partially blocked by the opacity of the pattern and transmitted by the parts of the piece which are not covered by the pattern. This improves the aesthetics of the light beam transmitted, by the transparent part, from the light source to the external environment.
  • Another possibility consists in decorating the transparent part by painting and marouflage, which makes it possible to obtain a similar result.
  • a film as described above can pose problems of color match with the paint of the vehicle, which has a negative impact on the aesthetics of the vehicle.
  • applying the film in one of the ways presented above may not make it possible to obtain a pattern with as high a precision as desired.
  • the object of the invention is in particular to remedy this problem by proposing a method which does not pose a problem of color matching with the paint of the vehicle and which is more precise than that of the prior art.
  • the transparent part is manufactured by molding a plastic, for example polycarbonate, polypropylene or poly (methyl methacrylate).
  • a plastic for example polycarbonate, polypropylene or poly (methyl methacrylate).
  • the transparent part is thus simple to produce and inexpensive.
  • the laser radiation has a wavelength comprised in the infrared, preferably in the near infrared.
  • the first and second layers of varnish are made from a material which absorbs or reflects ultraviolet radiation.
  • the first layer of varnish is transparent to any laser radiation having a wavelength included in the near infrared.
  • the first layer of varnish can thus allow the laser radiation to pass without there being any risk of it being damaged by the laser radiation.
  • the first and second layers of varnish are made from the same material.
  • the paint layer comprises an opacifying primer sublayer.
  • the opacifying primer undercoat opacifies the paint layer and thus improves its appearance. Without an opacifying primer undercoat, it would be necessary to increase the thickness of the paint layer to obtain a similar rendering, which is preferable to avoid for reasons of appearance (sagging, tint), costs and adhesion of the paint layer to the transparent part. In addition, it improves the adhesion of the paint to the transparent part.
  • the vehicle part is polished.
  • the stepped shape of the layers covering the transparent part is attenuated, which helps to make its surface appearance more homogeneous. This also helps to promote the transmission of the light beam through the vehicle part so as to maximize its illumination due to the absence of a so-called "magnifying" effect that could be caused by edge effects.
  • the manufacturing process improves the overall quality of the vehicle parts thus produced.
  • One represented on the figure 1 a first step of a process for manufacturing a vehicle part 2.
  • the vehicle part 2 comprises a transparent part 4 intended to protect a light source (not shown).
  • transparent is understood to mean that it is at least transparent to all light radiation having a wavelength included in the visible spectrum, that is to say between approximately 380 and 780 nm.
  • the transparent part 4 is made here in a plastic having this characteristic, in this case polycarbonate commonly referred to as “PC”. However, provision can be made to produce the transparent part in any other plastic having this characteristic, for example polypropylene (PP) or poly (methyl methacrylate) (PMMA).
  • PP polypropylene
  • PMMA poly (methyl methacrylate)
  • the transparent part is made by molding. Since such a process is known, it will not be described in more detail in what follows.
  • the vehicle part 2 comprises a layer of paint 6 which is deposited on the external surface of the transparent part 4.
  • external surface is meant a surface of the transparent part which is not located opposite the source of. light and which is intended to be exposed to the external environment once the vehicle is manufactured.
  • the paint layer 6 comprises a sub-layer of opacifying primer 8 on which is deposited a base coat 10.
  • the base coat 10 makes it possible to color the external appearance of the vehicle part 2.
  • the sub-layer of opacifying primer 8 makes it possible to improve the opacity of the paint layer 6 and to improve the adhesion of the base layer 10 to the transparent part 4.
  • the vehicle part 2 comprises a first layer of varnish 12 which is deposited on an external surface of the transparent part 4, above the layer of paint 6.
  • the layer of paint 6 is deposited then the first layer of varnish 12 on the transparent part 4.
  • a part of the vehicle part 2 is irradiated with the aid of laser radiation 14 so as to etch the paint layer 6 and the first layer of varnish 12.
  • This etching is carried out throughout the thickness of the layer of paint 6 and of the first layer of varnish 12.
  • the laser radiation 14 has a wavelength comprised in the infrared, that is to say comprised between 700 nm and 20,000 nm in the context of the invention.
  • An example of such laser radiation is that commonly referred to as a “CO 2 laser” which has a wavelength of 10600 nm.
  • the wavelength of the laser radiation 14 is included in the near infrared, that is to say between 700 and 2000 nm.
  • the first layer 12 of varnish is transparent to laser radiation 14, the latter has the advantage of not etching the first layer of varnish. This avoids a risk of damaging the varnish layer.
  • the irradiation is carried out only in a part of the vehicle part 2 in the sense that it is carried out according to a predefined pattern of the external surface of the first layer of varnish 12. It is controlled so that the layer of paint 6 and the first layer of varnish 12 is irradiated, therefore eliminated in the pattern and in all their thickness. Even if the first layer of varnish 12 is made of a material transparent to laser radiation 14, the irradiation of the underlying paint layer 6 makes it possible to eliminate the first layer of varnish 12 in the pattern. After the irradiation, the surface of the vehicle part 2 has two levels.
  • the transparent part 4 is no longer coated. In this area, visible light can be transmitted from the light source to the outside environment, and vice versa.
  • the transparent part 4 is coated with the layer of paint 6 and the first layer of varnish 12. In this zone, visible light cannot be transmitted from the external environment to the transparent part. 4, and vice versa, because it is absorbed by the paint layer 6.
  • a step of polishing the vehicle part 2 can be provided. It makes it possible to improve the transparency in the zone of the predefined pattern and, more generally, the aesthetics of the vehicle part 2. In addition, this buffing makes it possible to round off the corners formed by the etching carried out during the irradiation step, and therefore to improve the aesthetics of the vehicle part 2.
  • a layer of transparent primer 16 is deposited on the transparent part 4, above the layer of paint 6 and the first layer of varnish 12.
  • the transparent primer notably fills the areas in the pattern which have undergone the etching described in the above. This primer being transparent, it does not prevent the transmission of a light beam in the visible spectrum.
  • a second layer of varnish 18 is deposited on the transparent part 4, above the transparent primer layer 16.
  • the latter makes it possible to deposit the second layer of varnish 18, insofar as it is very difficult to remove. to do adhere a layer of varnish to another layer of varnish, whatever the nature of these two layers of varnish.
  • the second layer of varnish 18 has the particular function of protecting the transparent part 4 from any ultraviolet radiation to which it may be exposed, in particular from the sun.
  • the second layer of varnish 18 makes it possible to mechanically protect the transparent part 4, in particular to prevent it from being scratched or deformed by external stresses.
  • the first 12 and second 18 layers of varnish are made from the same material, but it is possible to use two different varnishes to make the two layers 12, 18.
  • the coating of the vehicle part 2 has two different structures.
  • the transparent part 4 is coated with the transparent primer layer 16 and the second layer of varnish 18. In this area, visible light can be transmitted from the light source to the external environment, and vice versa.
  • the transparent primer layer 16 improves the adhesion of the second layer of varnish 18 to the transparent part 4. It also makes it possible to avoid direct contact between the second layer of varnish 18 and the transparent part 4, to which case the transparent part could be chemically attacked by the varnish.
  • the transparent part 4 is coated with the layer of paint 6, the first layer of varnish 12, the transparent primer layer 16 and the second layer of varnish 18. In this zone, visible light cannot be transmitted from the external environment to the transparent part 4, and vice versa, because it is absorbed by the paint layer 6.
  • the light source may form part of an optical unit for the low beam and main beam of the vehicle, of an optical unit of flashing lights of the vehicle, or else of an optical unit of decorative lights.
  • the transparent part can integrate light guides or light sources without an optical unit, by insert molding, overmolding, fixing by gluing, welding, riveting or any other fixing means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)
EP20189095.1A 2019-08-05 2020-08-03 Verfahren zur herstellung eines transparenten fahrzeugteils Pending EP3772381A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1908966A FR3099713B1 (fr) 2019-08-05 2019-08-05 Procédé de fabrication d’une pièce de véhicule transparente

Publications (1)

Publication Number Publication Date
EP3772381A1 true EP3772381A1 (de) 2021-02-10

Family

ID=68807042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20189095.1A Pending EP3772381A1 (de) 2019-08-05 2020-08-03 Verfahren zur herstellung eines transparenten fahrzeugteils

Country Status (4)

Country Link
US (1) US11305312B2 (de)
EP (1) EP3772381A1 (de)
CN (1) CN112317278B (de)
FR (1) FR3099713B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4309805A1 (de) * 2022-07-21 2024-01-24 Compagnie Plastic Omnium SE Verfahren zur herstellung eines beschichteten fahrzeugteils

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DE19702977A1 (de) * 1997-01-28 1998-07-30 Brocke Kg I B S Verfahren zur Herstellung von Bedien-, Dekor- oder Anzeigeelementen mittels Laserstrahlung
DE19715702A1 (de) * 1997-04-15 1998-10-22 Fraunhofer Ges Forschung Verfahren zum selektiven Abtragen einer oder mehrerer Schichten
WO2001039991A1 (en) * 1999-12-01 2001-06-07 Techni-Coat International, Naamloze Vennootschap Method for the ornamental treatment of objects
WO2006025016A1 (en) * 2004-09-03 2006-03-09 Koninklijke Philips Electronics N.V. Method and apparatus for application of a pattern, element and device provided with such a pattern
US20100209731A1 (en) * 2008-05-01 2010-08-19 Hamano Plating Co., Ltd. Surface ornamental structure of an article and a method for ornamentally working the surface structure of the article
US20100279043A1 (en) * 2009-05-04 2010-11-04 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Housing and method of manufacturing the same

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Publication number Priority date Publication date Assignee Title
DE4419197A1 (de) * 1993-06-11 1994-12-15 Volkswagen Ag Verfahren zum Herstellen einer ein farbiges Dekor aufweisenden Lackierung
DE19702977A1 (de) * 1997-01-28 1998-07-30 Brocke Kg I B S Verfahren zur Herstellung von Bedien-, Dekor- oder Anzeigeelementen mittels Laserstrahlung
DE19715702A1 (de) * 1997-04-15 1998-10-22 Fraunhofer Ges Forschung Verfahren zum selektiven Abtragen einer oder mehrerer Schichten
WO2001039991A1 (en) * 1999-12-01 2001-06-07 Techni-Coat International, Naamloze Vennootschap Method for the ornamental treatment of objects
WO2006025016A1 (en) * 2004-09-03 2006-03-09 Koninklijke Philips Electronics N.V. Method and apparatus for application of a pattern, element and device provided with such a pattern
US20100209731A1 (en) * 2008-05-01 2010-08-19 Hamano Plating Co., Ltd. Surface ornamental structure of an article and a method for ornamentally working the surface structure of the article
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4309805A1 (de) * 2022-07-21 2024-01-24 Compagnie Plastic Omnium SE Verfahren zur herstellung eines beschichteten fahrzeugteils
FR3138056A1 (fr) * 2022-07-21 2024-01-26 Compagnie Plastic Omnium Se Procédé de fabrication d’une pièce de véhicule munie d’un revêtement

Also Published As

Publication number Publication date
CN112317278B (zh) 2024-02-13
FR3099713A1 (fr) 2021-02-12
CN112317278A (zh) 2021-02-05
US20210039135A1 (en) 2021-02-11
US11305312B2 (en) 2022-04-19
FR3099713B1 (fr) 2023-04-14

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Owner name: OPMOBILITY SE

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OPMOBILITY SE