• 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:
    A coating method for producing a selective metallization, comprising the deposition of a metallization layer, on a part of a lighting device and / or signaling of a motor vehicle intended to comprise metallized parts and non-metallized parts, comprises the removal (105) a cover film on the workpiece, the laser beam blank (106) of the cover film in correspondence with the outline of the non-metallized parts, the removal of the cover film from the parts to be metallized, the metallization (109). ) of the part, and the removal (111) of the film from the non-metallized parts.
    公开号:FR3036633A1
    申请号:FR1554703
    申请日:2015-05-26
    公开日:2016-12-02
    发明作者:Francois Gratecap；Erwan Faoucher
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    [0001] 1 coating method for selectively metallizing lighting device parts and / or signaling a motor vehicle. TECHNICAL FIELD The invention relates to a coating method for producing a selective metallization, comprising the deposition of a metallization layer, on a piece of lighting and / or signaling device of a motor vehicle intended to comprise metallized parts. and non-metallized parts. The invention also relates to a piece of lighting and / or motor vehicle signaling devices comprising metallized parts and non-metallized parts obtained by implementing a method according to the invention. PRIOR ART In the production of lighting and / or motor vehicle signaling parts, such as projectors or lights for automobiles, it is known to bring out a so-called "metallized" zone and other non-metallized zones. , so as to give a particular aspect or characteristic to the headlamps or the lights. Currently, projectors or lights for automobile are made by assembling several parts from different injection molds, each piece having shapes and distinctive lines requested by the car manufacturer. To achieve the metallized parts, vacuum evaporation metallization machines or cathodic sputtering metallization machines are generally used.
    [0002] In order to avoid the metallization of an entire piece, caches or screen pieces are made to prevent the metallization of certain parts. Those skilled in the art refer to these non-metallic parts protected by covers or screen pieces by the term "savings".
    [0003] 3036633 2 Making savings can prevent metallization on a particular area of a part to achieve an appearance or appearance that produces a contrast effect between the metallized and non-metallized surfaces.
    [0004] Saving is achieved by using metal covers with soft resin contours on areas of the plastic part that need not be metallized. These known arrangements, however, have the drawbacks of a large bulk in the metallization chambers and an increase in the cycle time of the total process. In addition, to ensure a good product finish, it is necessary to provide unhooked or shoulders on the parts, to ensure a good plating of metal covers and flexible resin parts protecting surfaces that must not be metallized. The fact of making recesses and shoulders, however, generates an undesirable aesthetic effect that is not appreciated by car manufacturers. In addition, the current method of producing savings provides insufficient precision, of the order of a millimeter, which is not suitable for producing high-end parts. In addition, the limitations due to the low accuracy of the current technique sometimes require assembling several pieces to avoid unsightly effects, which further increases the total cycle time of production. In the case of systems using flexible material covers, the injected parts present the risk of yellowing at the metallization transition. This yellowing is due to the high degassing rate of soft materials, which are generally based on silicones. To reduce or avoid the undesirable outgassing of silicone soft materials, it is necessary to increase the pumping times to evacuate the metallization chambers to a greater extent, which further increases the production cycle time.
    [0005] The use of a mask imposes additional process steps which considerably increase the production of such parts. Indeed, the cache is contaminated after a number of uses, and must be changed periodically. In addition, a change in the design of the different zones implies a change of cache, and therefore a longer or shorter interruption of the production line. Furthermore, the cache having a non-zero thickness, it follows that the edges of the non-metallized areas are most often not the exact reproduction of the edges of the cache used, and may be more or less blurred or more or less rectilinear. Other methods are known for performing selective metallization of workpieces, which consists in completely metallizing the surface of the workpiece and then selectively removing this metallized layer in order to obtain the desired aesthetic effect. According to a first known method, the entire surface of the part is metallized, then a cover is placed on the metallized part, then the parts of the part unprotected by the cover are attacked so as to selectively remove the metallization, then removes the cover, like the manufacture of printed circuits by insolation. The attack may be chemical or mechanical, particularly by sandblasting. The chemical etching has the effect of causing a discoloration of the metal at the edge of the metallized zone. An attack by sanding will remove the metal layer but will also affect the surface appearance of the room, creating a texturing that is not generally aesthetically desired: indeed, a smooth appearance and / or with a controlled texturing (aspect grained or leather for example) of the unmetallized surface is preferred by car manufacturers. According to another known method, the metallization layer is selectively removed by laser ablation. This technique makes it possible to obtain a very great smoothness of the metallization patterns, with non-metallized zones being less than 5 mm wide, impossible to obtain with the techniques of caching or masking the selected zones. In addition, the edge of the metallized area is clean and without fading. If the naked eye the surface of the piece exposed by the ablation shows no trace of the metal coating, a spectroscopic analysis shows residual traces of the metal; furthermore, a microscopic examination of the surface shows the traces of impact of the laser radiation on the surface of the piece. If the method with laser ablation allows to obtain precise metallization borders, it has the disadvantage of requiring a long production time, depending on the extent of the metallized surface to be scanned by the laser beam. It is therefore generally reserved for small areas of a few tens of cm2. SUMMARY OF THE INVENTION: A first object of the invention is to provide a novel coating method for performing selective metallization, comprising deposition of a metallization layer, on a piece of lighting and / or signaling device. of a motor vehicle, by overcoming the disadvantages of known techniques. A second object of the invention is to provide a new piece of lighting and / or motor vehicle signaling 20 having metallized portions and non-metallized parts with improved manufacturing accuracy. In this regard, the subject of the invention is a coating method for producing a selective metallization, comprising the deposition of a metallization layer, on a piece of lighting and / or signaling device for a motor vehicle intended to comprise metallized parts and non-metallized parts, characterized in that it comprises the steps of: a) applying a covering film to said piece of lighting and / or signaling device of a motor vehicle, b) cutting, by means of a laser beam, the cover film in correspondence with the contour of the parts of said part not to be metallized, to define a protective mask of said parts not to be metallized, 3036633 5 c) Peel off the film covering the parts of said part intended to be metallized, d) metallizing said part, e) Peeling off said protective mask ection to clear the non-metallized parts of said part. Within the meaning of the invention, the lighting device parts and / or motor vehicle signaling are rigid parts with a flexural modulus greater than 1000 MPa. Preferably these parts are made of plastic material, of the synthetic polymer type, molded injected.
    [0006] In particular, these parts are masks, reflectors or plates of fire or projector, but also lighting device or interior signage such as a display console, a ceiling lamp or a lighting dome. The method according to the invention may also have, in addition to the main characteristics mentioned above, one or more of the following additional characteristics: the application of the cover film is automatic. The covering film is produced by depositing a peelable material, namely able to be peeled, such as an ink, a paint, a varnish, a foam or a thermoplastic material. By peelable material is meant in the present invention that it has a certain adhesion on the surface on which it is deposited and is removable by pulling or pulling, the force required to remove it from the surface on which it is applied being non-zero and preferably being less than 50N, preferably less than 5N, measured according to test method F of ASTM D3330 / D3330M-04 (2010) entitled "Standard Test Method for Peel Adherence of Pressure-Sensitive Tape" A test method which measures the adhesive force, that is to say the force required to tear, at an angle of 900 from the surface to which they are applied, strips 100 mm long of a given material. - The cover film is a multilayer film having a top layer transparent to laser radiation and a lower layer absorbing laser radiation. By "laser radiation transparency" it is meant in the present invention that the material of the layer has an absorption coefficient of at least less than 30%, generally less than 15% and around 10% in wavelengths. laser radiation applied. The cover film is a thermoplastic film having a lower polyurethane (PU) layer loaded with carbon black. - Only the lower layer of the cover film is cut by the laser beam and is the protective mask portions of said part not to be metallized. - When peeling off the cover film, the lower layer of the film is detached from said part around the protective mask portions of said part not to be metallized, and at the location of the mask, the upper layer cover film is detached from the lower layer constituting said protective mask. 15 - The application of the cover film on the lighting device part and / or signaling of a motor vehicle is performed using a buffer or an application head. - The application of the cover film is performed using a pad or a preheated application head (e). The buffer or the application head is preheated to a temperature higher than the temperature generated by vacuum metallization on the surface of the workpiece. The buffer or application head is preheated to a temperature between 65 and 180 ° C, preferably between 65 and 160 ° C. - The cover film advantageously comprises a thermoplastic material fusible and peelable at room temperature, for example between 15 and 50 ° C. The cover film is a thermoplastic film having a lower layer of polyurethane (PU) which is brought into contact with the surface of the workpiece. - The thermoplastic material is low vacuum degassing rate. The covering film advantageously has a thickness of between 20 and 150 micrometers. Preferably, the thickness is between 20 and 80 microns, for example between 20 and 40 microns. The cover film has a tensile strength of the order of 30 MPa and a very high elongation at break, of the order of 450.degree. The invention also relates to a piece of lighting and / or motor vehicle signaling device having metallized parts and non-metallized parts, obtained by implementing a method according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood from the following description given by way of nonlimiting example, with reference to the appended drawings in which: FIG. 1 schematically represents a flowchart of a coating process according to the invention. - Figure 2 shows schematically the application of a cover film on a part not to be metallized a piece of lighting and / or signaling of a motor vehicle. FIG. 3 schematically represents the laser beam blank of the savings protection layer intended to be non-metallized, of a piece of lighting device and / or of a motor vehicle signaling. FIG. 4 schematically represents the protective layer of the saving of FIG. 3 after removal of the cover film of FIG. 2.
    [0007] DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, a method according to the invention, for coating for the deposition of a metallization layer on a part of a lighting device and / or signaling of a motor vehicle intended to comprise metallized portions and non-metallized portions, 3036633 includes main steps 100 to 113 and masked time steps 200 to 202. Steps 200 to 202 masked time include: a step 200 of heating a system for the removal of a cover film on a piece of lighting and / or signaling of a motor vehicle, a step 201 maintaining the temperature of a buffer or application head of the system and a step 202 of contacting the buffer or the application head preheated (e) to the holding temperature of step 201, with the film 10 cover. In step 100, a piece of lighting device and / or signaling of a motor vehicle is injected in a manner known per se into a thermoplastic injection machine. In step 101, ejecting the lighting device part (s) 15 and / or motor vehicle signaling injected (s) in step 100 for the move (s). In the case where the injection machine is close to the cover film deposition machine, step 102 is taken to remove the injected parts in place on the cover film deposition machine.
    [0008] In the case where the injection machines and the cover film removal machines are farther apart, step 103 is taken to remove the lighting device and / or motor vehicle signaling parts injected onto a conveyor. and then at step 104 of setting up the lighting device and / or vehicle signaling parts 25 injected onto the cover film dispensing machine, for example manually. In step 105, the cover film deposition machine deposits said film on the lighting device part and / or signaling of a motor vehicle. The pad or the application head ensures the application of the cover film on the part of the lighting device and / or signaling of a motor vehicle so as to ensure their mutual adhesion. The buffer or the application head is then withdrawn.
    [0009] At step 106, a laser beam is put in place to ensure the cutting of the cover film in correspondence with the contour of the parts of the lighting device part and / or signaling of a motor vehicle intended not to be metallized and constituting savings.
    [0010] The covering film is then peeled off, and only the lower layer constituting the savings protection mask remains on the lighting device and / or vehicle signaling part. Preferably, the cover film is a multilayer thermoplastic film having a polyurethane (PU) layer which is contacted with the surface of the workpiece. Before laser cutting, the cover film is applied, by means of a stamp or application head, to the parts of the lighting device and / or signaling part of a motor vehicle which need not be metallized.
    [0011] This application thus makes it possible to obtain a piece of lighting and / or signaling device for a motor vehicle ready to be metallized according to defined contours, by means of the laser beam, with an accuracy of the order of 2 / 10th of a millimeter. . Due to the adhesion of the cover film to the lighting device and / or motor vehicle signaling part, the parts covered by the protective mask do not require additional protection or cover, before going into metallization. . The laying film temperature of the cover film is preferably substantially greater than the temperature at which the lighting and / or motor vehicle signaling device part will be subjected by the vacuum metallization operation. The temperatures generated on the lighting device parts and / or motor vehicle signaling by vacuum metallization operations are of the order of 50 to 60 ° C, while the temperature of coating film deposition by the buffer or the application head is greater than the metallization temperature and is included (limits included) between 65 and 180 ° C, preferably between 65 or 70 ° C and 160 ° C, more preferably between 65 or 70 and 120 ° vs. This temperature is preferably greater than 100 ° C, for example of the order of 120 ° C and is preferably less than 125 ° C. The maximum temperature applicable is a function of the materials of the covering film, but also of the materials of the part of the lighting device on which the film is deposited: it is a question of not damaging it with an excessive temperature. Vacuum metallization machines are, for example, sputtering machines or other vacuum metal evaporation machines. At step 107, the illuminated lighting and / or signaling vehicle parts 10 are placed on a conveyor for the metallizing machines. In step 108, the prepared automotive lighting and / or signaling vehicle parts including their surface protected by the protective mask are put into place in the vacuum metallization machines. In step 109, the vacuum metallization is performed on the piece of lighting and / or motor vehicle signaling having surfaces protected by the protective mask. In step 110, the metallized automotive lighting and / or signaling unit parts 20 are extracted from the vacuum metallizing machines, for example manually. In step 111, the surface-coated protective masks are removed by peeling or other means to clear the unmetallized surfaces of the lighting and / or motor vehicle signaling room. In step 112, the part of a lighting device and / or signaling of a motor vehicle partially and selectively metallized is optionally assembled with a screen or a closing window, in particular in the case of a projector or a traffic light. 30 car vehicle. At step 113, the motor vehicle lighting and / or signaling unit parts or the completed automotive lighting and / or signaling devices are extracted to the packaging and storage for further processing. shipping to a car manufacturer. In FIG. 2, a motor vehicle lighting and / or signaling device part 1 is shown with a simple symbolic shape, but which can be complex. Part 1 is covered by a cover film 2 by means of a buffer or an application head, preferably preheated (e). The cover film 2 comprises a lower layer 3 and an upper layer 4. The lower layer 3 is intended to be fixed on the piece 1, to be cut in correspondence with the outline of the parts of the part 1 intended not to be metallized, that is to say the format of savings, and to ensure the protection of savings during the metallization of the part 1, before being removed by peeling. This lower layer 3 is preferably made of polyurethane (PU) loaded in carbon black, it absorbs the laser radiation. The upper layer 4 is transparent to the laser radiation. It is preferably made of polyethylene (PE). FIG. 3 shows a laser beam 5 used to cut the lower layer 3 so as to constitute a mask for savings that should not be subjected to metallization. The use of a laser beam 5 makes it possible to achieve this cut with an accuracy of 0.2 mm, at a very high cutting speed. By way of example, a 1064 nm YAG laser gives good cutting results on a film whose lower layer is made of polyurethane loaded with carbon black, and the transparent top layer is made of polyethylene. The laser can be continuous or pulsed, and the beam size is adapted to the desired cutting precision. The cover film 30 must comprise an upper layer 4 sufficiently transparent to avoid creating smoke and not be mechanically damaged by heat, and a lower layer 3 sufficiently opaque to absorb the laser radiation and ensure a precise and clean cut.
    [0012] 3036633 12 Once the cutting of the lower layer 3 performed, the film 2 cover is peeled off and only remains on the part 1 of lighting and / or signaling of a motor vehicle, the mask 6 (Figure 4) intended to protect savings from metallization. For this purpose, around the mask 6 the lower layer 3 is detached from the workpiece 1, and at the location of the mask 6, the upper layer 4 is detached from the lower layer 3. The workpiece 1, with its savings protected by the mask 6, is then ready for metallization. Advantageously, the cover film comprises a thermoplastic material, fusible and peelable at room temperature. Preferably, the cover film comprises a support layer made of a material of the polyethylene type, while the layer intended to be applied in contact with the automobile part to form the masks of savings is a layer of a different material, easily peelable at room temperature, for example a polyurethane. Tests have shown that the application of the covering films can preferably be carried out so as to define, in contact with the part, a thickness of between 20 and 150 microns, especially between 20 and 80 microns, and more particularly between 20 and 40 microns. micrometers, using an application temperature greater than 65 ° C and in particular between 100 and 160 ° C, especially for a duration of the order of one to several seconds. The tests have shown that the films thus defined are satisfactory and avoid the disadvantages of the prior art, in particular degassing which can lead to fuzzy limits or color defects during metallization. The tests also showed that the peel removal of the cover film is easy and leaves no trace on the part corresponding to the savings. The films particularly adapted to the implementation of the invention preferably have a low degassing rate. The films particularly suitable for the implementation of the invention preferably have a high tensile strength, of the order of 30 MPa and a very high elongation at break, of the order of 450%. The characteristic of flexural deformation of the films used for the implementation of the invention is a very high flexural deformation, so as to implement savings in complex conformations, in particular by allowing a depth of application of the invention. order of 150 mm. The invention described with reference to a particular embodiment is not in any way limited to it, but on the contrary covers any modification of form and any variant embodiment. Thus, instead of applying a film forming part of a bilayer strip, it is also possible to apply a film forming part of a band with a higher number of layers, for example three-layer film. In this case, the intermediate layer may have an additional role of barrier to guarantee the good homogeneity of the film deposited on the part of a motor vehicle. In general, the cover film is made of a material having characteristics for reversible adhesion. In particular, the constituent material adheres under given adhesion conditions and no longer adheres under given non-adhesion conditions. In the case of a deposit of a film by application of a preheated buffer, it is a question of thermal conditions, as has been explained above. Thus, as an illustrative example at 100.degree. C., the film is subjected to its adhesion conditions and when it is lowered to 90.degree. C., the latter is subjected to its non-adherence conditions, thereby allowing peeling. Even better performance is achieved by going down to or below 50 ° C. However, other techniques than applying a film by applying a preheated buffer can be used.
    [0013] For example, it is possible to use methods in which the material constituting the cover film adheres as a function of electrostatic conditions or by pressure, for its deposition. The cover film can then be deposited at temperatures close to room temperature (for example, at 25 ° C). In such cases, it will be ensured in the choice of material that the exposure of the film to the temperatures encountered during the metallization phase does not alter its adhesion properties, otherwise the masking operation risks being compromised and will not will not lead to the desired result.
    [0014] Thanks to the invention, the new coating method for the deposition of a metallization layer on a piece of lighting and / or vehicle signaling device increases productivity, to be adapted on a line of fabrication and to provide a precision of the boundary between metallized and non-metallized parts of the order of 0.2 mm with respect to the nominal limit or better than 0.2 mm (an accuracy range of 0.4 mm or less). The fact of automatically making savings thanks to the process according to the invention also makes it possible to dispense with metal cuffs 15 with silicone rims of the prior art, which prevented the good filling of vacuum metallization machines. An advantage of the invention is to increase the productivity of the metallization lines by not only making it possible to achieve several savings on the same part, but also to automate the manufacture by integrating the automatic realization of savings in the production line. In addition, we obtain parts on which the limit of the metallized zones is clear and without color change or degraded near these limits. In addition, the surface of the part which is not metallized is free of texturing traces by sanding or laser and has no residual traces of metallization since the non-metallized surface has not been coated with an initial layer of metallization. There is thus a metallized material step at the limit with a slope less than or equal to 2 ° and a quasi-rectilinear transition. The metallized layer transition - non-metallized surface of the part is abrupt and substantially even throughout the boundary. The transition profile at the boundary is established by measuring the thickness of the metal layer which is determined by local measurement of the conductimetry.
    [0015] The masks for protecting the savings may be peeled manually or automatically, for example by suction or by electrostatic effect, or by laser ablation. The invention described with reference to several embodiments is not in any way limited to them, but on the contrary covers any modification of form and any variant embodiment.
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. Coating method for selectively metallizing, comprising the deposition of a metallization layer, on a part of a lighting and / or motor vehicle signaling device intended to comprise metallized parts and non-metallized parts, characterized in that it comprises the steps of: a) applying a film (2) of cover on said piece (1) of lighting device and / or signaling of a motor vehicle, b) Cutting, by means of a laser beam (5) the cover film (2) in correspondence with the contour of the portions of said part (1) which are not to be metallized, to define a mask (6) for protecting said parts that are not to be metallized, c) Remove by peeling the film (2) for covering the parts of said part (1) intended to be metallized, d) metallizing said part (1), e) Peeling off said mask (6) for protection against er the non-metallized parts of said part (1).
    [0002]
    2. Method according to claim 1, characterized in that the film (2) cover is a multilayer film having an upper layer (4) transparent to laser radiation and a lower layer (3) absorbing laser radiation.
    [0003]
    3. Method according to claim 2, characterized in that the film (2) cover is a thermoplastic film having a lower layer (3) of polyurethane (PU) loaded carbon black.
    [0004]
    4. Method according to one of claims 1 to 3, characterized in that only the lower layer (3) of the cover film is cut by the laser beam (5) and constitutes the mask (6) for protecting the parts 30 of said part (1) intended not to be metallized. 3036633 17
    [0005]
    5. Method according to claim 4, characterized in that during the peel removal of the film (2) cover, the lower layer (3) of the film is detached from said piece (1) around the protective mask parts of said parts to avoid being metallized, and at the location of the mask (6), the top layer (4) of the cover film is detached from the lower layer (3) constituting said mask (6) protection.
    [0006]
    6. Method according to one of claims 1 to 3, characterized in that the application of the film (2) cover on the part (1) of lighting and / or signaling of a motor vehicle is carried out at using a buffer or an application head.
    [0007]
    7. Method according to claim 6, characterized in that the pad or the application head is preheated (e).
    [0008]
    8. Method according to claim 7, characterized in that the pad or the application head is preheated (e) at a temperature above the temperature generated by the vacuum metallization on the surface of the workpiece.
    [0009]
    9. The method of claim 8, characterized in that the pad or the application head is preheated (e) at a temperature between 65 and 180 ° C, preferably between 65 and 160 ° C.
    [0010]
    10. Method according to one of claims 1 to 9, characterized in that the film (2) cover comprises a thermoplastic material fusible and peelable at room temperature.
    [0011]
    11. Method according to one of claims 1 to 10, characterized in that the film (2) cover has a thickness between 20 and 150 micrometers. 3036633 18
    [0012]
    12. Method according to one of claims 1 to 11, characterized in that the film (2) cover has a breaking strength of the order of 30 MPa and an elongation at break of about 450 'Vo. 5
    [0013]
    13. Part of a lighting device and / or motor vehicle signaling comprising metallized parts and non-metallized parts, obtained by carrying out a method according to one of claims 1 to 12. 10
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0243498A1|1985-10-26|1987-11-04|MITSUI TOATSU CHEMICALS, Inc.|Strippable coating film, and coating process using it|
    WO1997007992A1|1995-08-28|1997-03-06|Fritz Borsi Kg|Method of applying a coating selectively to parts of a transparent plate|
    US20060013997A1|2004-07-15|2006-01-19|Schott Ag|Coated substrate with a curved surface, and a method for production of a coated substrate such as this|CN108453020A|2017-12-22|2018-08-28|东莞广泽汽车饰件有限公司|A kind of double-colored processing method of product surface|
    EP3549822A1|2018-04-04|2019-10-09|PSA Automobiles SA|Car body part with an embedded lighting device for a motor vehicle and motor vehicle comprising said car body part|
    CN111328297A|2017-11-06|2020-06-23|全耐塑料公司|Laser treatment of masked edges|
    法律状态:
    2016-05-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-02| PLSC| Search report ready|Effective date: 20161202 |
    2017-05-30| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-28| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-31| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-30| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-31| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554703A|FR3036633B1|2015-05-26|2015-05-26|COATING PROCESS FOR REALIZING SELECTIVE METALLIZATION OF LIGHTING DEVICE AND / OR SIGNALING PARTS OF A MOTOR VEHICLE.|
    FR1554703|2015-05-26|FR1554703A| FR3036633B1|2015-05-26|2015-05-26|COATING PROCESS FOR REALIZING SELECTIVE METALLIZATION OF LIGHTING DEVICE AND / OR SIGNALING PARTS OF A MOTOR VEHICLE.|
    PCT/EP2016/061953| WO2016189111A1|2015-05-26|2016-05-26|Coating process for producing a selective metallization of motor vehicle lighting and/or signalling device parts|
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