EP3849842A1 - Elément de carrosserie rétroéclairé à fort contraste - Google Patents
Elément de carrosserie rétroéclairé à fort contrasteInfo
- Publication number
- EP3849842A1 EP3849842A1 EP19772672.2A EP19772672A EP3849842A1 EP 3849842 A1 EP3849842 A1 EP 3849842A1 EP 19772672 A EP19772672 A EP 19772672A EP 3849842 A1 EP3849842 A1 EP 3849842A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- bodywork
- coating
- perforations
- transparent
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/2619—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic built in the vehicle body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/50—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with lights or registration plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/20—Multi-color single source or LED matrix, e.g. yellow blinker and red brake lamp generated by single lamp
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/1886—Bumper fascias and fastening means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R19/50—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with lights or registration plates
- B60R2019/505—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with lights or registration plates with lights
Definitions
- the invention relates to a bodywork element of a motor vehicle and more particularly a style part intended to contribute to the general external appearance of the vehicle.
- These styling pieces or these bodywork elements is to enhance a line or to emphasize a shape in order to reinforce the image that the manufacturer wishes to associate with his brand or his vehicle model.
- the chrome strips running along the side of the vehicle, the rocker panels, the brand emblem, the door handle covers, the mirror caps are these parts style whose design is the subject of particular care on the part of the vehicle designers.
- all the body parts visible from the outside and contributing to the general appearance of the vehicle, such as an opening, a bumper, a radiator grille, can also be considered as body elements or styling parts. falling within the scope of the invention.
- the transmittance of a material is the fraction of the light flux passing through it.
- the transmittance represents the ratio of the light intensity transmitted by the material to the incident light intensity.
- An element is qualified as transparent when it allows light to pass through it in the visible region, making it possible to clearly distinguish the objects behind it and has a transmittance of at least 70%.
- An element is qualified as semi-transparent when it lets light pass through it in the visible range, making it possible to clearly distinguish the objects behind it, and has a transmittance of less than 70%, without however being opaque.
- An element is qualified as translucent when it allows light to pass through it in the visible range, but without making it possible to clearly distinguish the objects behind it and has a transmittance of at least 50%.
- An element is qualified as semi-translucent when it lets light pass through it in the visible range, making it possible to clearly distinguish the objects behind it, and has a transmittance of less than 50%, without however being opaque.
- the device optics are turned off, and the appearance of the bodywork element is given by the coating of paint forming the outer layer of the bodywork element.
- the optical device is switched on and the bodywork element appears in the form uniformly luminous surface.
- the lighting device By activating the lighting device, it is also possible to reveal particular patterns such as a logo with the manufacturer's mark, or even particular figurative elements which remain invisible when the vehicle is lit by the light of the day.
- Such a lighting device is proposed in the document FR 3 046 387, which describes a bodywork element of a motor vehicle comprising a body formed of a transparent material, arranged visibly on a support forming part of the bodywork. of the vehicle, one side of which is covered with a semi-transparent or semi-translucent decorative coating.
- a diffusing light guide connected to a light source is disposed between the support and the body of the body element.
- the illuminated surface of the bodywork element is distinguished well enough from the rest of the bodywork. For example, if you want the illuminated surface to appear a certain color, which differs from that of the rest of the bodywork, it is necessary to ensure that a sufficient contrast is obtained between the color of the luminous surface and paint the rest of the body. This contrast is particularly necessary in the case of lighting of the device in daylight, for aesthetic reasons. Indeed, at present, for large body parts there is no solution which allows both to make the body element substantially identical to the rest of the body when the light source is switched off. (we speak of “invisibility” to the naked eye) and to distinguish it very clearly when the light source is on.
- the invention aims to meet this need by providing a motor vehicle body element comprising a wall formed of a transparent or translucent material, behind which is disposed a light source, an external face of the wall being coated with a semi-transparent or semi-translucent coating, the external face having, when the light source is switched off, first predetermined trichromatic components,
- the covering and / or the wall include perforations through which the radiation from the light source can pass, so that when the light source is switched on, the wavelength of the radiation emitted by the light source passing through the wall and the semi-transparent or semi-translucent coating is changed so that the external face has second predetermined trichromatic components, distinct from the first predetermined trichromatic components.
- Perforation here means an orifice or through hole present in a substantially homogeneous surface, which is of any size and outline.
- the term perforation is in no way limiting in terms of dimensions or shape of the outline.
- the coating and / or the wall are considered to include a perforation if at least one of the layers constituting them has a hole passing through the entire thickness of said layer.
- perforation covers both the absence of application of a material in a localized manner and the removal of a material layer in a localized manner after having applied it uniformly.
- the coating and / or the wall include perforations through which the radiation from the light source can pass, one can obtain a significant contrast between the color of the light surface and that of the paint of the rest of the body when the light source is on, while making the body element substantially identical to the rest of the body when the light source is turned off.
- the size of the perforations can for example be chosen so that they are not or hardly visible to the naked eye (at least not unless approaching very closely) when the source of light is not on, but allow light to pass when the light source is on, which allows to obtain a different color for the body element with a strong contrast between it and that of the rest of the body.
- the size of the perforations results from a compromise between the transmittance that one seeks to obtain and the concealment of their presence.
- the perforations are obtained by chemical, mechanical or thermal attack on the surface of the wall or coating.
- the perforations are obtained by applying laser radiation to the surface of the wall or of the coating.
- the perforation can be obtained by laser radiation applied to the layer to be perforated, the point of application of the laser beam being controlled in position, speed, and duration, for example by one or more discrete or continuous scans. , in order to obtain the shape and size of the desired perforation (s).
- the laser radiation has a wavelength in the near infrared, preferably between 780nm and 3000nm, for example 1064nm, or in the long ultraviolet, preferably between 400 and 315nm, for example 355 nm.
- the application of the laser radiation being carried out by a series of pulses, the duration of each pulse being less than 150 ns, preferably less than 1 ps, more preferably less at 1 fs.
- the perforations have dimensions in length and width of between 1 ⁇ m and 1 m.
- the perforation may be a disk a few millimeters in diameter or a border crossing the entire wall having a few millimeters in width and a length of several tens of centimeters.
- the perforations are holes with a diameter between 20 and 300 ⁇ m in diameter, preferably between 20 and 60pm in diameter.
- the perforations are spaced from each other by a distance of between 0.1 mm and 0.9 mm.
- the light source comprises light emitting diodes or optical fibers.
- the coating comprises a layer of fluorescent or coloring pigments.
- the coating comprises a film comprising electroluminescent pigments, capable of being excited by a source of electrical power.
- the bodywork element comprises a bodywork structure made of an opaque material, provided with an insert formed of a transparent or translucent material disposed on a support forming part of the body structure, a part of the external wall of the body element being a wall of the insert, the light source being disposed between the support and the insert.
- the bodywork element comprises a bodywork structure made of a transparent or translucent material, the wall being a portion of the wall of the bodywork structure.
- the semi-transparent or semi-translucent coating comprises a primer whose thickness is preferably between 5 and 30 micrometers, a tinted base whose thickness is preferably between 2 and 30 micrometers, and a transparent varnish whose thickness is preferably between 5 and 30 micrometers.
- the perforations are made in the tinted base and / or the transparent varnish and / or the primer.
- the perforations are made in the primer, over its entire thickness, so as to improve the transmittance of the coating.
- the inventors have in fact unexpectedly found that the localized absence of a primer layer does not, as might be expected, adversely affect the adhesion of the tinted base coat subsequently applied to the outer face of the wall.
- One possible explanation is that the attack suffered by the primer coat to remove it would have an effect on the external face favoring the adhesion of the tinted base coat on the external face.
- the transparent varnish is made from a polymer material which has been heated to a heating temperature causing the creep of the polymeric material, preferably at least at the glass transition temperature of the polymeric material, the heating temperature being for example between 23 ° C and 60 ° C.
- the coating comprises, between the tinted base and the layer of varnish, a layer of a material making it possible to seal the pores of the tinted base.
- the semi-transparent or semi-translucent coating is produced by respecting the following steps:
- the coating thus obtained is cleaned before applying a protective varnish.
- the tinted primer and base layers do not adhere in the areas where the masking ink has been applied, which creates perforations in the coating.
- the wall is made of a material such as Polycarbonate (PC), Polymethylmethacrylate (PMMA), Polyurethane (PU), Acrylonitrile Butadiene Styrene (ABS), Acrilonitrile Styrene Acrylate (ASA), styrene acrilonitrile (SAN), a mixture of Acrilonitrile Styrene Acrylate and Polycarbonate, a mixture of Poolycarbonate and Polyterephthalate of Ethylene), or of amorphous polyolefin such as cyclo-olefin copolymers (COC) or cycloolefins-polymers (COP).
- PC Polycarbonate
- PMMA Polymethylmethacrylate
- PU Polyurethane
- ABS Acrylonitrile Butadiene Styrene
- ABS Acrylonitrile Butadiene Styrene
- ASA Acrilonitrile Styrene Acrylate
- SAN styrene a
- amorphous polyolefin makes it possible to obtain very good chemical adhesion to the bodywork part made of polypropylene, and therefore allows the insertion of a transparent or translucent element by overmolding. In addition, such adhesion allows the transmission of forces from the transparent or translucent overmolded element to the main body of the polypropylene part.
- the invention also relates to a method for applying the coating of a bodywork element (according to the invention, comprising the following steps:
- the method of applying the coating further comprises a step of applying transparent varnish.
- FIG. 1 shown a perspective view of the front part of a motor vehicle provided with two body elements according to the invention
- FIG. 2 shows a schematic view of a cross section of a body element of a motor vehicle according to a first embodiment of the invention
- FIG. 3 is a view similar to Figure 2 of a body element of a motor vehicle according to a second embodiment of the invention.
- FIG. 4 is a schematic view of a cross section of the wall of a bodywork element coated with a coating according to a first embodiment of the invention
- FIG. 5 is a view of detail V of Figure 4.
- FIG. 6 is a view similar to Figure 4 of a bodywork element coated with a coating according to a second embodiment of the invention.
- FIG. 7 is a view of detail VII of Figure 6;
- FIG. 8 is a view similar to Figure 4 of a bodywork element coated with a coating according to a third embodiment of the invention.
- Figure 9 is a detail view of Figure 4.
- Figure 10 is a view similar to Figure 8 illustrating the creep of the varnish
- FIG. 11 is a view similar to Figure 4 of a bodywork element coated with a coating according to a fourth embodiment of the invention.
- FIG. 12 is a view similar to Figure 4 of a bodywork element coated with a coating according to a fifth embodiment of the invention.
- FIG. 13 is a view similar to Figure 4 of a bodywork element coated with a coating according to a sixth embodiment of the invention.
- FIG. 14 is a schematic perspective view of a support film used to make a coating of a bodywork element according to a seventh embodiment of the invention.
- FIG. 1 the front part 10 of a motor vehicle, provided with two body elements 12 according to the invention.
- the elements of body 12 are, for example, arranged here above the front lights 13, to enhance the line of front lights 13.
- the bodywork element 12 comprises a wall 14 formed of a transparent or translucent material, behind which is arranged a light source 16.
- the wall 14 has on its outer face 18, that is to say on the face of the support looking outside the vehicle and visible from the outside, a coating of semi-transparent or semi-translucent decoration 20.
- the external face 18 has, when the light source 16 is switched off, first predetermined trichromatic components.
- the first predetermined trichromatic components are advantageously chosen to be the same as those of the color which has been used for the rest of the bodywork of the motor vehicle.
- the bodywork element 12 cannot be distinguished, by touch or with the naked eye (or at least, unless approached very closely), from the rest of the bodywork of the front part 10 of the vehicle.
- the body member 10 comprises a body structure 21 made of an opaque material, provided with an insert 22 formed of a transparent material or translucent disposed on a support 24 forming part of the body structure.
- the wall 14 is a wall of the insert 24, and the external face 18 of the wall the external face of the insert 24.
- the light source 16 is disposed between the support 24 and the insert 22.
- the bodywork element comprises a bodywork structure 21 made of a transparent or translucent material, the wall 14 being a portion of the wall of the structure of bodywork.
- the light source 16 again arranged behind the wall 14, for example being retained by a support 24.
- the wall 14 is made using a material such as, by way of example and not exclusively, Polycarbonate (PC), Polymethylmethacrylate (PMMA), Polyurethane (PU), Acrylonitrile Butadiene Styrene (ABS) or Acrilonitrile Styrene Acrylate (ASA), styrene acrilonitrile (SAN), a mixture of Acrilonitrile Styrene Acrylate and Polycarbonate, a mixture of Poolycarbonate and Polyterephthalate of Ethylene) or also of amorphous polyolefin such as cyclo-olefins copolymers (COC) or cyclo-olefins-polymers (COP).
- PC Polycarbonate
- PMMA Polymethylmethacrylate
- PU Polyurethane
- ABS Acrylonitrile Butadiene Styrene
- ABS Acrylonitrile Butadiene Styrene
- ASA Acrilonitrile Styrene Ac
- the parts produced using these thermoplastic materials can be obtained by injection or by molding.
- the shape of the wall 14 is then adapted at will to harmonize with the shape of the bodywork on which, or around which, the body element 12 is disposed.
- the thickness of the wall 14 is not limited, and is determined as a function of the shape and the rigidity of the bodywork element 12 that one seeks to achieve; it can therefore vary from a few millimeters to one, or even two, centimeters, preferably between 2.5 mm and 4 mm.
- the support 24 is a part of the bodywork preferably made using an opaque material such as for example a loaded polypropylene such as that which is commonly used in the automotive industry to produce the openings or the parts attached to the bodywork such as the mirror caps.
- the support 3 can also be confused with the structural part on which the bodywork element 1 is fixed.
- the light source 16 is preferably an optical device comprising light emitting diodes (LEDs) or small diameter optical fibers, which can be arranged in layers or strands. Such plies are described in particular in FR 3,046,387, by the same applicant. In FIGS. 3 and 4, the light source 16 comprises a plurality of diodes 25.
- LEDs light emitting diodes
- small diameter optical fibers Such plies are described in particular in FR 3,046,387, by the same applicant.
- the light source 16 comprises a plurality of diodes 25.
- the semi-transparent or semi-translucent coating 20 has a first aesthetic function which is to impart a color to the bodywork element 1 so that the external face of this element integrates with the adjacent bodywork parts.
- the color chosen here is preferably identical to the color of the body parts.
- the second function of the decorative coating 14 is to let all or part of the light emitted by the light source 16 pass. It is therefore important to choose a thin coating.
- the semi-transparent or semi-translucent coating 20 comprises a primer 26 whose thickness is preferably between 5 and 30 micrometers, a tinted base 28 whose thickness is preferably between 2 and 15 micrometers, and a transparent varnish 30 whose thickness is preferably between 5 and 30 micrometers.
- the coating 20 is provided with perforations 31 through which the radiation from the light source 16 can pass, so that when the light source 16 is on, the length wave of the radiation emitted by the light source passing through the wall 14 and the semi-transparent or semi-translucent coating 20 is modified so that the external face 18 has second predetermined trichromatic components, distinct from the first predetermined trichromatic components.
- the size of the perforations can, for example, be chosen so that they are not or hardly visible to the naked eye, or at least, not on condition of approaching them very closely. It can for example result from a compromise between obtaining of the transmittance sought for the coating and their discretion on the final part obtained. It is also possible, in a complementary or alternative manner, to choose the layer of the coating to be perforated so as to preserve the appearance of the shade and thus ensure that the body element remains substantially identical to the rest of the body.
- the tinted base 28 which is provided with perforations 31.
- perforations 31 can be obtained by chemical attack on the paint layer of the tinted base 28. Perforations are thus obtained in the form of micro-cracks 31. It is also conceivable that the perforations 31 are obtained by mechanical or thermal attack.
- the perforations 31 can also be obtained by applying a laser beam to the coating 20 or the part of the coating concerned.
- a perforation 31 can result from the impact of a single pulse from a laser head. We speak in this case of micro perforation.
- a perforation 31 can also result from a succession of pulses from a laser head, applied in succession, so as to obtain a perforation of larger dimensions than a micro perforation.
- a perforation can in particular be obtained by scanning the laser head, so as to obtain a succession of adjacent micro perforations or overlapping each other. This is called surface stripping by laser scraping.
- the tinted base 28 is provided with micro perforations 32 obtained by attack by laser radiation.
- the laser radiation has a wavelength in the near infrared, preferably between 780nm and 3000nm, for example 1064nm.
- the application of laser radiation is preferably carried out by a series of pulses, the duration of each pulse being less than 150 ns.
- a laser in the near infrared and more particularly at the wavelength 1064 nm makes it possible to obtain good results.
- the results will be all the more satisfactory with good beam quality.
- good beam quality is meant here when the intensity profile of the laser is Gaussian.
- a Ytterbium source laser makes it possible to obtain particularly satisfactory results.
- the application of laser radiation is carried out by a series of pulses, the period between each pulse being preferably less than 150 ns.
- a pulse duration of less than 150 nanoseconds makes it possible to improve the quality and the sharpness of the perforation.
- a decrease of this pulse duration further improved the quality and sharpness of the perforation.
- the pulse duration could be less than 1 picosecond, or even less than 1 femtosecond.
- the micro perforations 32 are in this particular example substantially circular holes, the diameter of which will be chosen depending on whether one wishes to favor the fact that they are the least visible to the naked eye, or on the contrary the fact that '' they allow more radiation to pass through from the light source 16.
- a perforation diameter of between 2 to 20 microns will be chosen.
- a larger perforation diameter will be chosen, between 20 to 300 microns.
- a good compromise is to choose a perforation diameter between 20 and 100 microns.
- the spacing between each impact will depend on the effect and the desired light intensity. Spaces of 0.1 to 0.9 mm between each impact seem relevant. We will choose micro-perforation patterns 32 (gridding of the impacts of laser radiation) according to the optical effect that we want to obtain.
- a rectilinear arrangement and at constant spacing of the micro perforations 32 will give a very homogeneous effect, while a more random arrangement and / or with variable spacings will give a more heterogeneous effect which could be desired for reasons of style.
- the laser radiation has a wavelength in ultraviolet rays and for example at 355 nm.
- a laser in the near infrared and more particularly at the wavelength 1064 nm allows to obtain good results
- the perforations are sharper with a wavelength laser in ultraviolet light.
- a pulse duration of less than 15 nanoseconds.
- the perforations 31 are formed in the primer layer 26. More particularly, the perforations 31 pass through the primer layer 26 right through, in other words throughout thickness of the primer layer 26.
- the perforations 31 are in this embodiment obtained from preferably by applying laser radiation.
- a perforation 31 can for example result from a succession of pulses from a laser head, applied in succession, so as to obtain a perforation of larger dimensions than a micro perforation.
- the fact of choosing to make the perforations in the primer layer makes it possible to preserve the appearance of the tinted base layer 28 and thus ensure that the bodywork element 10 remains substantially identical to the rest of the bodywork.
- Such a perforation 31 can in particular be obtained by scanning the laser head, so as to obtain a succession of adjacent micro perforations and / or overlapping each other, also called surface stripping by laser scraping.
- Successive performances can overlap, and be spaced by a center-to-center distance of 10 to 300 micrometers.
- the superposition of these overlaps in several directions advantageously makes it possible to create a pattern.
- the inventors have in fact remarked, surprisingly, that the localized absence of primer layer 26 does not harm, as might be expected, the adhesion of the tinted base layer 28 subsequently applied to the external face 18 of the wall.
- One possible explanation is that the attack suffered by the primer layer 26 to remove it, in particular the heat emitted by the application of laser radiation, would have an effect on the external face 18 promoting the adhesion of the tinted base layer 28 on the external face 18.
- the perforations 31 have any shape and are not limited to a circular shape. As illustrated in FIG. 8, the perforations 31 can be distributed in any manner, or, in a similar manner to the embodiment of FIGS. 6 and 7, at constant spacing.
- a primer layer 26 is applied to the outer face 18 of the wall of the bodywork element 12. This step is carried out in a manner known to those skilled in the art. using a primary applicator which we will not describe here.
- the laser radiation is applied in one or more scans, a scan consisting of a series of pulses by a laser head.
- Perforations are obtained for example by a succession of micro perforations overlapping each other following a succession of scans.
- the usual painting process for an exterior bodywork part known to the automotive industry is interrupted.
- the transparent varnish layer 30 of the coating 20 is previously heated at the location of the decor to a temperature causing the creep of the varnish.
- this temperature is higher than the glass transition temperature of the polymer material.
- the heating temperature will for example be between 23 ° C and 60 ° C, which corresponds to the glass transition temperature of the varnishes usually used in the context of the painting of bodywork elements.
- an additional layer of a product is applied to the tinted perforated base 28 for plug the pores of the paint.
- a product comprises polymer particles which by capillary action are absorbed in the finishing paint so as to clog the pores.
- An example of such a sealant product is known in the trade under the name WAXOYL 100 PLUS or WAXOYL 100 PLUS CARCARE. Such a sealant product can be inserted into the perforations 31, 32.
- a second layer of varnish 30 ’ is provided over the tinted base 28, which will also be attacked by the laser and provided with through holes 32. In another variant not shown, these perforations will reach the wall 14 and will therefore pass through the primer 26.
- the fluorescent pigments are made from Rare Earths, in particular lanthanides, or from aromatic structures such as xanthene, rhodamines, aminonapthalimides, perinones, and thioindigos.
- the coloring pigments can be soluble in the material, which allows good transmission to light, or be pigments, such as, for example, carbon black.
- Such pigments make it possible to modify the spectrum of the radiation emitted by the light source 16 and thus act as a chromatic filter.
- an electroluminescent film 35 comprises electroluminescent particles, capable of being excited by an electric current so as to modify the spectrum of the radiation which passes through them.
- the electrominescent film 35 can be obtained in the following manner. A layer of film is applied to a substrate using an electrically conductive material, then a layer of dielectric film, then a layer of film of phosphorus, the phosphorus being excited by ultraviolet radiation during its application. A layer of electrode film is then applied. The phosphor film is excitable by the electric current sent by the electric power source 36, so as to obtain an electroluminescent light.
- FIG. 13 it is the wall 14 which is provided with perforations 38, preferably in the form of blind holes 38.
- the layers of primer 26 and of tinted base 28 do not are applied here only in the orifices 38, which they make it possible to fill.
- the rest of the outer surface 141 of the wall is not covered with primer 26 or tinted base 28.
- a layer of transparent varnish 30 is applied, covering both the tinted base 28 and directly the external surface of the wall 141 where it has not been perforated. Light passes through the external surface 141.
- the size of the orifices is chosen so that they are not visible to the naked eye, or at least, provided that they are approached very closely.
- the semi-transparent or semi-translucent coating is produced by respecting the following steps:
- thermoforming of the support film 40 thermoforming of the support film 40
- the coating 20 thus obtained is cleaned before applying a layer of protective varnish.
- the primer 26 and tinted base 28 layers do not adhere in the areas where the masking ink 41 has been applied, which creates perforations in the coating.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1858331A FR3085905B1 (fr) | 2018-09-14 | 2018-09-14 | Element de carrosserie retroeclaire a fort contraste |
| FR1860555A FR3085907B1 (fr) | 2018-09-14 | 2018-11-15 | Element de carrosserie retroeclaire a fort contraste |
| PCT/EP2019/074432 WO2020053368A1 (fr) | 2018-09-14 | 2019-09-12 | Elément de carrosserie rétroéclairé à fort contraste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3849842A1 true EP3849842A1 (fr) | 2021-07-21 |
Family
ID=65201464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19772672.2A Withdrawn EP3849842A1 (fr) | 2018-09-14 | 2019-09-12 | Elément de carrosserie rétroéclairé à fort contraste |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3849842A1 (fr) |
| FR (2) | FR3085905B1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US798759A (en) * | 1904-12-08 | 1905-09-05 | Flash Light Sign Company | Illuminated sign. |
| US3639748A (en) * | 1970-11-27 | 1972-02-01 | Goodyear Tire & Rubber | Bumper structure having a light fixture associated therewith |
| WO2013014171A1 (fr) * | 2011-07-26 | 2013-01-31 | Faurecia Interieur Industrie | Structure intérieure de véhicule rétro éclairée |
| US20140119038A1 (en) * | 2012-10-29 | 2014-05-01 | Vestatec (U.K.) Limited | Lighted trim assembly and perforated member therefor |
| DE202014100020U1 (de) * | 2014-01-03 | 2015-01-05 | Novem Car Interior Design Gmbh | Dekorteil für einen Fahrzeuginnenraum |
| DE102014221080A1 (de) * | 2014-10-16 | 2016-04-21 | Johnson Controls Interiors Management Gmbh | Innenausstattungsteil für kraftfahrzeuge |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6429049U (fr) * | 1987-08-14 | 1989-02-21 | ||
| DE19822636A1 (de) * | 1998-05-21 | 1999-11-25 | Sidler Gmbh & Co | Leuchtvorrichtung in der Fahrzeugtür |
| US7753541B2 (en) * | 2006-05-19 | 2010-07-13 | Volkswagen Ag | Motor vehicle |
| FR2925417B1 (fr) * | 2007-12-21 | 2010-04-02 | Peugeot Citroen Automobiles Sa | Dispositif d'assemblage impliquant une glace de projecteur fixee a une piece de vehicule automobile, procedes et fabrication |
| DE102012003200B4 (de) * | 2012-02-17 | 2021-04-22 | Audi Ag | Lichtdurchlässiges Karosserieteil der Außenhaut eines Kraftfahrzeugs |
| WO2016024029A1 (fr) * | 2014-08-13 | 2016-02-18 | Grupo Antolín-Ingeniería, S.A. | Revêtement décoratif à motif lumineux pour habitacle de véhicule automobile |
| DE102015101012B4 (de) * | 2015-01-23 | 2022-02-03 | Novem Car Interior Design Gmbh | Formteil, insbesondere als Formteil ausgebildetes Dekorteil und/oder Verkleidungsteil für einen Fahrzeuginnenraum, und Verfahren zum Herstellen eines derartigen Formteils |
| FR3046387B1 (fr) * | 2015-12-30 | 2019-03-22 | Compagnie Plastic Omnium | Element de carroserie retroeclaire |
-
2018
- 2018-09-14 FR FR1858331A patent/FR3085905B1/fr active Active
- 2018-11-15 FR FR1860555A patent/FR3085907B1/fr active Active
-
2019
- 2019-09-12 EP EP19772672.2A patent/EP3849842A1/fr not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US798759A (en) * | 1904-12-08 | 1905-09-05 | Flash Light Sign Company | Illuminated sign. |
| US3639748A (en) * | 1970-11-27 | 1972-02-01 | Goodyear Tire & Rubber | Bumper structure having a light fixture associated therewith |
| WO2013014171A1 (fr) * | 2011-07-26 | 2013-01-31 | Faurecia Interieur Industrie | Structure intérieure de véhicule rétro éclairée |
| US20140119038A1 (en) * | 2012-10-29 | 2014-05-01 | Vestatec (U.K.) Limited | Lighted trim assembly and perforated member therefor |
| DE202014100020U1 (de) * | 2014-01-03 | 2015-01-05 | Novem Car Interior Design Gmbh | Dekorteil für einen Fahrzeuginnenraum |
| DE102014221080A1 (de) * | 2014-10-16 | 2016-04-21 | Johnson Controls Interiors Management Gmbh | Innenausstattungsteil für kraftfahrzeuge |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2020053368A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3085907A1 (fr) | 2020-03-20 |
| FR3085905B1 (fr) | 2021-05-14 |
| FR3085905A1 (fr) | 2020-03-20 |
| FR3085907B1 (fr) | 2022-05-27 |
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