Light-emitting bumper for a motor vehicle

Abstract

The utility model discloses a light-emitting bumper for car, including the light -permeable bumper body still includes: light diffusion coating group, light diffusion coating group is coated on the front lateral wall of bumper body to carry out diffusion to the light that emits through bumper body, and light diffusion coating group is light -permeable coating, light -proof coating group, light -proof coating group is coated on the front lateral wall of light diffusion coating group, and light -proof coating group is not light -permeable coating, openwork pattern, openwork pattern is through on light -proof coating group, protection coating group, protection coating group is coated on the front lateral wall of light -proof coating group, and at least part of protection coating group is filled in openwork pattern, and protection coating group is light -permeable coating. Its simple structure, it not only solved the openwork pattern laser carving front color paint layer easy damage, the problem of low yield, can further solve the technical problem of poor light uniformity and long -term weather resistance deficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a light-up bumper for automobiles. Background Technology

[0002] With the development of electric and intelligent vehicles, there is a clear trend towards closed front fascias and the addition of illuminated components in car exterior designs. Illuminated exterior systems, such as illuminated bumpers and grilles, have become important elements in enhancing the overall technological feel and brand recognition of vehicles.

[0003] In existing technologies, most luminous exterior decoration processes typically employ a five-layer paint structure: a primer and a color paint are sprayed sequentially onto a plastic frame, followed by laser micro-hole engraving, and finally a clear primer and a varnish are sprayed. To protect the fragile color paint layer before laser engraving, the industry has experimented with spraying an ultra-thin varnish layer as a protective layer after the color paint before laser engraving.

[0004] However, this process still has the following drawbacks:

[0005] 1. Insufficient optical uniformity: Even with a protective layer, bright spots and halos can still easily appear after light penetrates multiple layers of paint, and the uniformity of light emission needs to be improved.

[0006] 2. Long-term weather resistance challenge: Automotive exteriors are exposed to ultraviolet rays, rain, snow and temperature changes for a long time. Existing processes are insufficient in protecting the paint surface against yellowing and aging, which may lead to a decrease in light transmittance or color distortion after long-term use.

[0007] 3. Limited functionality: Existing processes mainly address yield issues during production, without systematically optimizing the optical quality and long-term durability of the final product.

[0008] Therefore, there is an urgent need in this field for an innovative process that can not only ensure high production yield but also further improve luminescence uniformity and long-term weather resistance. Summary of the Invention

[0009] This utility model aims to solve, at least to some extent, one of the problems existing in the prior art. To this end, this utility model proposes a light-up bumper for automobiles. Its structure is simple. It not only solves the problems of easy damage and low yield of the front paint layer of the laser-engraved hollow pattern, but also further solves the technical problems of poor light uniformity and insufficient long-term weather resistance.

[0010] The above objective is achieved through the following technical solution:

[0011] A light-emitting bumper for automobiles includes a light-transmitting bumper body and further includes:

[0012] A light-diffusing coating is applied to the front sidewall of the bumper body to diffuse the light emitted through the bumper body, and the light-diffusing coating is a light-transmitting coating.

[0013] A light-shielding coating assembly is applied to the front sidewall of the light-diffusing coating assembly, and the light-shielding coating assembly is an opaque coating.

[0014] A perforated pattern, which extends through the light-shielding coating assembly;

[0015] A protective coating assembly is applied to the front sidewall of the light-shielding coating assembly, at least partially filling the hollow pattern, and the protective coating assembly is a light-transmitting coating.

[0016] In some embodiments, the light diffusion coating assembly includes a first primer layer and a light diffusion layer, wherein the first primer layer and the light diffusion layer are sequentially applied from back to front on the front sidewall of the bumper body, and the light diffusion layer is an opaque coating.

[0017] In some embodiments, the light-diffusing layer is made of a coating having light-diffusing microparticles.

[0018] In some embodiments, the thickness of the first primer layer is 15 μm to 20 μm, and / or the thickness of the light diffusion layer is 5 μm to 10 μm.

[0019] In some embodiments, the light-shielding coating assembly includes a light-shielding paint layer and a first clear coat layer, wherein the light-shielding paint layer and the first clear coat layer are applied sequentially from back to front on the side wall of the light-diffusing coating assembly away from the bumper body, the light-shielding paint layer is an opaque coating, and the first clear coat layer is a translucent coating.

[0020] In some embodiments, the film thickness of the light-shielding varnish layer is 12 μm to 18 μm, and / or the film thickness of the first clear varnish layer is 7 μm to 13 μm.

[0021] In some embodiments, the protective coating assembly includes a second primer layer, an anti-ultraviolet layer, and a second clear coat layer, wherein the second primer layer, the anti-ultraviolet layer, and the second clear coat layer are applied sequentially from back to front on the sidewall of the light-shielding coating assembly away from the light-diffusing coating assembly, at least a portion of the second primer layer fills the perforated pattern, and the anti-ultraviolet layer is a light-transmitting coating suitable for absorbing or reflecting external ultraviolet rays.

[0022] In some embodiments, the UV-resistant layer is made of a coating containing nano UV absorbers or shielding agents.

[0023] In some embodiments, the second primer layer has a film thickness of 19 μm to 25 μm, the UV-resistant layer has a film thickness of 8 μm to 12 μm, and / or the second clear coat layer has a film thickness of 35 μm to 45 μm.

[0024] In some embodiments, multiple LED beads are spaced apart at the back of the bumper body, and multiple micro-holes are perforated in the light-shielding coating to form a hollow pattern, and the multiple micro-holes are arranged corresponding to the light-emitting areas of the multiple LED beads.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] 1. This utility model is used for luminous bumpers for automobiles. It has a simple structure and not only solves the problems of easy damage to the paint layer and low yield of laser-engraved hollow patterns, but also further solves the technical problems of poor light uniformity and insufficient long-term weather resistance. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the luminous bumper in an embodiment of this utility model. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are not only some embodiments of this utility model, but all embodiments. The components of the embodiments of this utility model can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of the claimed invention.

[0031] Example:

[0032] like Figure 1As shown, this embodiment provides a light-emitting bumper for automobiles, including a light-transmitting bumper body 1, and further comprising:

[0033] Light diffusion coating group 2 is applied to the front side wall of the bumper body 1 to diffuse the light emitted through the bumper body 1, and the light diffusion coating group 2 is a light-transmitting coating.

[0034] The light-shielding coating group 3 is applied to the front sidewall of the light-diffusing coating group 2, and the light-shielding coating group 3 is an opaque coating.

[0035] Hollowed-out pattern 4, which runs through the light-shielding coating group 3;

[0036] The protective coating group 5 is applied to the front sidewall of the light-shielding coating group 3. At least part of the protective coating group 5 is filled within the hollow pattern 4, and the protective coating group 5 is a light-transmitting coating.

[0037] In this embodiment, since the bumper body 1 is a light-transmitting structure, i.e., the bumper body 1 is made of a transparent substrate, it facilitates the illumination of the light behind the bumper body 1 from back to front. A light-diffusing coating group 2, a light-shielding coating group 3, and a protective coating group 5 are sequentially coated on the front sidewall of the bumper body 1 from back to front. A perforated pattern 4 is provided through the light-shielding coating group 3, and at least a portion of the protective coating group 5 fills the perforated pattern 4. Furthermore, since the light-diffusing coating group 2 is a light-transmitting coating, the light-shielding coating group 3 is an opaque coating, and the protective coating group 5 is a light-transmitting coating, light can sequentially pass through the bumper body 1, the light-diffusing coating group 2, the perforated pattern 4, and the protective coating group 5 to illuminate the light forward. In this way, the light diffusion coating group 2 diffuses or guides the light emitted from the bumper body 1, ensuring that the light is uniformly scattered before reaching the light shielding coating group 3. At the same time, the corresponding parts of the hollow pattern 4 can transmit light, so that the hollow pattern 4 can emit light, meeting the user's special customization needs and effectively improving the user experience. Of course, the protective coating group 5 also protects the lower paint or plastic substrate of the bumper body 1 from UV radiation damage, thus ensuring the optical stability and appearance retention of long-term outdoor use. Its structure is simple. It not only solves the problems of easy damage and low yield of the paint layer before laser engraving of the hollow pattern 4, but also further solves the technical problems of poor light uniformity and insufficient long-term weather resistance.

[0038] Furthermore, the light diffusion coating group 2 includes a first primer layer 21 and a light diffusion layer 22, wherein the first primer layer 21 and the light diffusion layer 22 are sequentially applied to the front side wall of the bumper body 1 from back to front, and the light diffusion layer 22 is an opaque coating.

[0039] Preferably, the light diffusion layer 22 is made of a coating having light diffusion particles.

[0040] Specifically, the thickness of the first primer layer 21 is 15 μm to 20 μm, and / or the thickness of the light diffusion layer 22 is 5 μm to 10 μm.

[0041] In this embodiment, a first primer layer 21 and a light diffusion layer 22 are sequentially applied to the front sidewall of the bumper body 1 from back to front. The treated bumper body 1 is placed in a dust-free, temperature- and humidity-controlled workshop, and the first primer layer 21 is sprayed onto the front sidewall of the bumper body 1 by an automated spraying robot. After spraying, it is baked in an oven at 60°C for 20 to 30 minutes. The first primer layer 21 can improve the adhesion between the subsequent paint and the surface of the bumper body 1, and also protect the bumper body 1. Then, the cured first primer layer 21... Immediately after spraying, the light diffusion layer 22 is applied and then baked at 60°C for 10 minutes. The light diffusion layer 22 can effectively scatter the light transmitted from the bumper body 1, achieving a larger area and more uniform light emission effect, thereby achieving a visually glare-free bright spot effect. In addition, in this embodiment, the light diffusion layer 22 is made of a coating with light diffusion particles. Specifically, the light diffusion layer 22 can be made of a transparent coating containing silica or organosilicon microspheres. Of course, in this embodiment, the first primer layer 21 is preferably made of a two-component polyurethane primer with high adhesion.

[0042] Furthermore, the light-shielding coating group 3 includes a light-shielding paint layer 31 and a first clear coat layer 32, wherein the light-shielding paint layer 31 and the first clear coat layer 32 are sequentially applied from back to front on the side wall of the light-diffusing coating group 2 at the end away from the bumper body 1. The light-shielding paint layer 31 is an opaque coating, and the first clear coat layer 32 is a light-transmitting coating.

[0043] Preferably, the thickness of the light-shielding varnish layer 31 is 12 μm to 18 μm, and / or the thickness of the first clear varnish layer 32 is 7 μm to 13 μm.

[0044] In this embodiment, a light-shielding paint layer 31 and a first clear coat layer 32 are sequentially coated on the front sidewall of the light diffusion layer 22 from back to front. First, the light-shielding paint layer 31 is sprayed onto the cured light diffusion layer 22 using an automated spraying robot. Specifically, a specific monochrome paint or a paint with a metallic effect is selected according to the color requirements of the vehicle model, thus forming a non-transparent paint. This makes the light-shielding paint layer 31 an opaque coating. After spraying, it is baked at a low temperature of 60±2℃ for 12±2 minutes to allow the paint film of the light-shielding paint layer 31 to dry to the touch. Then, the light-shielding paint layer 31 is applied through a light-shielding robot. A light-colored paint layer 31 is used to set the body color and form a light-blocking background. Next, an ultra-thin clear coat protective layer is sprayed onto the surface of the light-blocking paint layer 31 to form the first clear coat layer 32. After spraying, it is baked at 60±2℃ for 18±2 minutes to reach a semi-cured state with a hardness of H-2H, making it scratch-resistant and easy for subsequent laser engraving work. After the first clear coat layer 32 is completed, the bumper body 1 is safely transported and temporarily stored. During transport, the high hardness of the first clear coat layer 32 makes it difficult to be scratched, and its smooth surface makes it difficult to attract foreign objects. Dust can be easily removed using an ion air gun, greatly improving the yield of the pre-laser engraving process. The first clear coat layer 32 fundamentally solves the industry pain point of the paint layer being easily damaged and contaminated before laser engraving, further improving the yield of mass production. Finally, an ultraviolet laser is used, preferably with a wavelength of 355nm. Based on the designed pattern, the laser beam is programmed and controlled to perform laser engraving on the light-shielding coating group 3, and the laser beam is controlled to scan and drill only on the light-shielding paint layer 31 and the first clear coat layer 32. The hollow pattern 4 extends through the light-shielding coating group 3, that is, the hollow pattern 4 only extends through the light-shielding paint layer 31 and the first clear varnish layer 32. More preferably, in order to better laser engrave the hollow pattern 4, the laser power of the ultraviolet laser is 8W, the frequency is 80kHz, and the scanning speed is 2000mm / s. This ensures that the two coatings, the light-shielding paint layer 31 and the first clear varnish layer 32, are vaporized and removed in one go, thereby forming a micro-pore array with a diameter of 0.05mm on the light-shielding coating group 3, but without damaging the underlying light-diffusing coating group 2, that is, without damaging the underlying light-diffusing layer 22.

[0045] In addition, in this embodiment, the first varnish layer 32 is preferably made of a varnish with high hardness and easy laser engraving effect.

[0046] Preferably, the protective coating group 5 includes a second primer layer 51, an anti-ultraviolet layer 52, and a second clear coat layer 53, wherein the second primer layer 51, the anti-ultraviolet layer 52, and the second clear coat layer 53 are sequentially applied from back to front on the sidewall of the light-shielding coating group 3 at the end away from the light-diffusing coating group 2, at least a portion of the second primer layer 51 is filled within the hollow pattern 4, and the anti-ultraviolet layer 52 is a light-transmitting coating suitable for absorbing or reflecting external ultraviolet rays.

[0047] Furthermore, the UV-resistant layer 52 is made of a coating containing nano UV absorbers or shielding agents.

[0048] Specifically, the second primer layer 51 has a film thickness of 19 μm to 25 μm, the UV-resistant layer 52 has a film thickness of 8 μm to 12 μm, and / or the second clear coat layer 53 has a film thickness of 35 μm to 45 μm.

[0049] In this embodiment, a second primer layer 51, an anti-UV layer 52, and a second clear varnish layer 53 are sequentially coated from back to front on the front sidewall of the first clear varnish layer 32. First, after the laser engraving of the hollow pattern 4 is completed, the area of ​​the hollow pattern 4 is cleaned and dusted. Then, a transparent primer is sprayed onto the entire surface to form the second primer layer 51. During the spraying of the second primer layer 51, at least a portion of the paint in the second primer layer 51 flows into and fills the micropores generated by the laser engraving, that is, at least a portion of the paint in the second primer layer 51 fills the hollow pattern 4, thereby forming a smooth base. After spraying, it is baked at a temperature of 60±2℃ for 28±2 minutes. Then, the anti-UV layer 52 is sprayed onto the cured second primer layer 51. Baking at 60±2℃ for 15 minutes, the UV-resistant layer 52 effectively absorbs or reflects ultraviolet rays, thus protecting the underlying light-shielding paint layer 31 and the plastic substrate bumper body 1 from UV radiation damage, fundamentally delaying yellowing and chalking, and maintaining long-term optical stability. Then, a second clear coat layer 53 is sprayed onto the UV-resistant layer 52 and baked at 80℃ for 45 minutes to fully cure it. The combined effect of the UV-resistant layer 52 and the second clear coat layer 53 forms a dual protection system, significantly improving the product's resistance to yellowing and aging, ensuring long-term outdoor optical stability and appearance retention, and guaranteeing high consistency in product performance and quality. Furthermore, while solving the basic yield problem, the addition of the light-diffusing layer 22 and the UV-resistant layer 52 systematically solves the industry challenges of optical uniformity and long-term weather resistance.

[0050] In this embodiment, the material of the UV-resistant layer 52 is a coating containing nano UV absorbers or shielding agents. Specifically, the UV-resistant layer 52 is preferably made of a transparent coating containing nano zinc oxide or titanium dioxide. In addition, in this embodiment, the second primer layer 51 is preferably made of a highly fluid transparent primer. More preferably, in this embodiment, the second clear coat layer 53 is preferably made of a two-component polyurethane clear coat with high wear resistance, high weather resistance, and high gloss.

[0051] Specifically, multiple LED beads are spaced apart at the back of the bumper body 1, and multiple micro-holes are perforated in the light-shielding coating group 3 to form a hollow pattern 4, and the multiple micro-holes are arranged corresponding to the light-emitting areas of the multiple LED beads.

[0052] In this embodiment, multiple LED beads are spaced apart at the back of the bumper body 1, i.e., the LED beads are located on the rear end of the bumper body 1. At the same time, multiple micro-holes are respectively provided through the light-shielding coating group 3 to form a hollow pattern 4. The multiple micro-holes are arranged corresponding to the light-emitting areas of the multiple LED beads, so that the light emitted by each LED bead can be uniformly transmitted through the bumper body 1, the first primer layer 21, the light diffusion layer 22, the hollow pattern 4, the second primer layer 51, the anti-ultraviolet layer 52, and the second clear coat layer 53 before being emitted forward.

[0053] More preferably, in this embodiment, the bumper body 1 is formed by injection molding. The material is preferably made of modified polypropylene (PP) or polycarbonate / acrylonitrile-butadiene-styrene copolymer (PC / ABS) with high light transmittance and high haze. The light transmittance of the material of the bumper body 1 is preferably 53% to 58%, and its haze value is ≥93%, thereby ensuring that light can pass through the bumper body 1 efficiently and evenly, thus avoiding bright spots or halo phenomena to form a high-quality "surface glowing" effect. In addition, the bumper body 1 after injection molding needs to be degreased, cleaned and electrostatically dusted before the first primer layer 21 can be sprayed.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A light-emitting bumper for automobiles, comprising a light-transmitting bumper body (1), characterized in that, Also includes: A light diffusion coating group (2) is applied to the front sidewall of the bumper body (1) to diffuse the light emitted by the bumper body (1), and the light diffusion coating group (2) is a light-transmitting coating. A light-shielding coating group (3) is applied to the front sidewall of the light-diffusing coating group (2), and the light-shielding coating group (3) is an opaque coating. A hollow pattern (4) extends through the light-shielding coating group (3); A protective coating group (5) is applied to the front sidewall of the light-shielding coating group (3), at least a portion of the protective coating group (5) is filled within the hollow pattern (4), and the protective coating group (5) is a light-transmitting coating.

2. The illuminated bumper for automobiles according to claim 1, characterized in that, The light diffusion coating group (2) includes a first primer layer (21) and a light diffusion layer (22), wherein the first primer layer (21) and the light diffusion layer (22) are applied sequentially from back to front on the front side wall of the bumper body (1), and the light diffusion layer (22) is an opaque coating.

3. A light-emitting bumper for automobiles according to claim 2, characterized in that, The light diffusion layer (22) is made of a coating containing light diffusion particles.

4. A light-emitting bumper for automobiles according to claim 2, characterized in that, The thickness of the first primer layer (21) is 15 μm to 20 μm, and / or the thickness of the light diffusion layer (22) is 5 μm to 10 μm.

5. A light-emitting bumper for automobiles according to claim 1, characterized in that, The light-shielding coating group (3) includes a light-shielding paint layer (31) and a first clear coat layer (32), wherein the light-shielding paint layer (31) and the first clear coat layer (32) are applied sequentially from back to front on the side wall of the light-diffusing coating group (2) at the end away from the bumper body (1), the light-shielding paint layer (31) is an opaque coating, and the first clear coat layer (32) is a light-transmitting coating.

6. A light-emitting bumper for automobiles according to claim 5, characterized in that, The thickness of the light-shielding varnish layer (31) is 12 μm to 18 μm, and / or the thickness of the first clear varnish layer (32) is 7 μm to 13 μm.

7. A light-emitting bumper for automobiles according to claim 1, characterized in that, The protective coating group (5) includes a second primer layer (51), an anti-ultraviolet layer (52), and a second clear coat layer (53). The second primer layer (51), the anti-ultraviolet layer (52), and the second clear coat layer (53) are applied sequentially from back to front on the sidewall of the light-shielding coating group (3) away from the light-diffusing coating group (2). At least a portion of the second primer layer (51) is filled within the hollow pattern (4), and the anti-ultraviolet layer (52) is a light-transmitting coating suitable for absorbing or reflecting external ultraviolet rays.

8. A light-emitting bumper for automobiles according to claim 7, characterized in that, The UV-resistant layer (52) is made of a coating containing nano UV absorbers or shielding agents.

9. A light-emitting bumper for automobiles according to claim 7, characterized in that, The second primer layer (51) has a film thickness of 19 μm to 25 μm, the UV-resistant layer (52) has a film thickness of 8 μm to 12 μm, and / or the second clear coat layer (53) has a film thickness of 35 μm to 45 μm.

10. A light-emitting bumper for automobiles according to claim 1, characterized in that, Multiple LED beads are spaced apart at the back of the bumper body (1), and multiple micro-holes are perforated in the light-shielding coating group (3) to form a hollow pattern (4), and the multiple micro-holes are arranged corresponding to the light-emitting areas of the multiple LED beads.

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