A lightweight coated grating

Abstract

This utility model discloses a lightweight coated grille, relating to the field of automotive grille technology. It includes a metal mesh substrate, with a composite coating applied to the outer side of the metal mesh substrate. The composite coating is sequentially configured as a primer layer, a core layer, a transition layer, and a top layer. The primer layer comprises a conversion layer and a protective layer, with the inner side of the conversion layer and the outer side of the protective layer contacting the outer side of the metal mesh substrate and the inner side of the core layer, respectively. The conversion layer is a nano-zirconium-based conversion agent coating, the protective layer is a graphene-containing epoxy zinc-rich primer coating, and the core layer is a hollow ceramic microparticle-modified polyurethane coating. The outer side of the core layer contacts the inner side of the transition layer, and the outer side of the transition layer contacts the inner side of the top layer. This lightweight coated grille, based on an aluminum / magnesium alloy substrate and a multi-layer synergistic coating design, achieves comprehensive performance improvements in long-term corrosion resistance, environmental tolerance, thermal and acoustic management, and surface self-maintenance while maintaining extreme lightweight properties.

Description

Technical Field

[0001] This utility model relates to the field of automotive grille technology, specifically to a lightweight coated grille. Background Technology

[0002] In today's era of rapid industrial and technological development, coating technology, as a key means of material surface protection and functional optimization, is widely used in many fields such as aerospace, automobile manufacturing, marine engineering, and construction facilities.

[0003] Traditional anti-corrosion coatings have always occupied an important position in coating technology. Among them, thick zinc-rich paint is a typical example. The reason why thick zinc-rich paint can provide a certain degree of anti-corrosion protection is mainly due to the sacrificial anode protection effect of zinc powder. When there are minor damages on the coating surface, the zinc powder will preferentially undergo an oxidation reaction, thereby protecting the base metal from corrosion. However, in order to achieve the ideal anti-corrosion effect, a large amount of high-density zinc powder is often added to thick zinc-rich paint.

[0004] The addition of a large amount of high-density zinc powder directly leads to a significant increase in coating weight. In some applications where weight is extremely sensitive, every gram of weight increase can have a significant impact on a vehicle's fuel efficiency and load-bearing capacity. Moreover, excessively thick coatings may also cause other problems, such as increased internal stress, which can easily lead to cracking and peeling, further affecting the anti-corrosion effect and service life. At the same time, in the automotive industry, vehicles need to face various complex environmental conditions during use, such as high temperature, humidity, and salt spray, which places high demands on the anti-corrosion and environmental resistance performance of coatings. Single-function coatings cannot meet the comprehensive performance requirements of automobiles.

[0005] Therefore, in response to the above problems, the applicant needs to design a lightweight coated grille to solve the problem. Utility Model Content

[0006] The purpose of this invention is to provide a lightweight coated grille to solve the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lightweight coated grid, comprising a metal mesh substrate, wherein the outer side of the metal mesh substrate is coated with a composite coating, the composite coating being configured from the inside out as a primer layer, a core layer, a transition layer, and a top layer, the primer layer comprising a conversion layer and a protective layer, wherein the inner side of the conversion layer and the outer side of the protective layer are in contact with the outer side of the metal mesh substrate and the inner side of the core layer, respectively, the conversion layer being a nano-zirconium-based conversion agent coating, the protective layer being a graphene-containing epoxy zinc-rich primer coating, the core layer being a hollow ceramic microparticle-modified polyurethane coating, the outer side of the core layer being in contact with the inner side of the transition layer, and the outer side of the transition layer being in contact with the inner side of the top layer.

[0008] Furthermore, the transition layer is a mica iron oxide epoxy coating.

[0009] Furthermore, the surface layer is a photocatalytic fluorosilicone resin coating.

[0010] Furthermore, the core layer has a thickness of 80~120μm, and the hollow ceramic microparticles have a particle size of 5~20μm, accounting for 30~50% of the total mass of the core layer.

[0011] Furthermore, the protective layer contains 0.5~2wt% graphene, ≥60wt% zinc powder, and has a coating thickness of 15~30μm.

[0012] Furthermore, the photocatalytic material of the surface layer is nano-titanium dioxide, with a content of 3~8wt%, and the surface of the surface layer is treated with ultraviolet light curing, with a curing energy of 500~800mJ / cm².

[0013] Furthermore, the metal mesh substrate is made of aluminum alloy or magnesium alloy, and the mesh porosity is 40-70%.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the lightweight coated grille is based on an aluminum alloy / magnesium alloy substrate and a multi-layer synergistic coating design, achieving comprehensive performance improvement in long-term corrosion resistance, environmental tolerance, thermal and acoustic management, and surface self-maintenance under the premise of extreme lightweighting. The specific details are as follows:

[0015] This lightweight coated grille achieves significant overall performance enhancement through the synergistic design of multiple composite coatings: the combination of a nano-zirconium conversion layer and a high-zinc-content graphene epoxy zinc-rich primer provides excellent cathodic protection and physical shielding against corrosion under thin-coat conditions; the 80~120μm hollow ceramic microparticle-modified polyurethane core layer significantly reduces the coating weight while providing excellent thermal and sound insulation properties; the mica iron oxide epoxy transition layer strengthens the barrier against corrosive media and weather resistance; the photocatalytic fluorosilicone resin surface layer, combined with nano-titanium dioxide and UV curing technology, achieves self-cleaning function while ensuring high hardness and wear resistance. Combined with an aluminum / magnesium alloy substrate and a 40~70% porosity design, the entire system simultaneously achieves multiple goals such as long-term corrosion protection, environmental tolerance, thermal and acoustic management, and surface self-maintenance under the premise of extreme lightweighting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the metal mesh substrate structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the composite coating structure of this utility model;

[0018] Figure 3This is a schematic diagram of the layered distribution of this utility model.

[0019] In the diagram: 1. Metal mesh substrate; 2. Conversion layer; 3. Protective layer; 4. Core layer; 5. Transition layer; 6. Surface layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-3 As shown, a lightweight coated grid of the present invention includes a metal mesh substrate 1, and the outer side of the metal mesh substrate 1 is coated with a composite coating. The composite coating is configured from the inside out as a primer layer, a core layer 4, a transition layer 5, and a top layer 6. The primer layer includes a conversion layer 2 and a protective layer 3. The inner side of the conversion layer 2 and the outer side of the protective layer 3 are in contact with the outer side of the metal mesh substrate 1 and the inner side of the core layer 4, respectively. The conversion layer 2 is a nano-zirconium-based conversion agent coating. The protective layer 3 is a graphene-containing epoxy zinc-rich primer coating. The core layer 4 is a hollow ceramic microparticle modified polyurethane coating. The outer side of the core layer 4 is in contact with the inner side of the transition layer 5, and the outer side of the transition layer 5 is in contact with the inner side of the top layer 6.

[0022] The transition layer 5 is a mica iron oxide epoxy coating. The mica iron oxide epoxy transition layer 5 provides excellent physical barrier properties and weather resistance. The scaly structure of the mica iron oxide can effectively extend the penetration path of corrosive media and enhance the overall anti-corrosion effect of the coating system. At the same time, its good UV resistance protects the core layer 4 from aging.

[0023] The surface layer 6 is a photocatalytic fluorosilicone resin coating. The photocatalytic fluorosilicone resin surface layer 6 gives the grid surface self-cleaning and anti-fouling properties. Fluorosilicone resin provides excellent weather resistance, water repellency and chemical resistance, while photocatalytic materials, such as nano titanium dioxide, can decompose organic pollutants on the surface under light, keeping the grid appearance clean and extending the maintenance cycle.

[0024] The core layer 4 has a thickness of 80~120μm, and the hollow ceramic microparticles have a particle size of 5~20μm, accounting for 30~50% of the total mass of the core layer 4. By controlling the thickness of the core layer 4 to 80~120μm and filling it with 30~50% 5~20μm hollow ceramic microparticles, the overall weight of the coating is reduced. At the same time, these microparticles form a large number of closed pores in the coating, which greatly improves the heat insulation and sound insulation performance of the coating and effectively reduces heat transfer and noise.

[0025] The protective layer 3 contains 0.5~2wt% graphene and ≥60wt% zinc powder, with a coating thickness of 15~30μm. By adding 0.5~2wt% graphene to the protective layer 3, its excellent physical barrier and conductivity, combined with the cathodic protection provided by the high zinc powder content of ≥60wt%, achieves excellent and durable anti-corrosion protection for the metal mesh substrate 1 with a thin coating thickness of only 15~30μm, further supporting the goal of lightweight coating.

[0026] The photocatalytic material of the surface layer 6 is nano-titanium dioxide, with a content of 3~8wt%. The surface of the surface layer 6 is treated with ultraviolet light curing, with a curing energy of 500~800mJ / cm². The 3~8wt% nano-titanium dioxide in the surface layer 6 ensures effective photocatalytic activity to achieve self-cleaning function. The ultraviolet light curing treatment with an energy of 500~800mJ / cm² can quickly and efficiently crosslink and cure the fluorosilicone resin, forming a highly dense, wear-resistant, scratch-resistant, and hard surface with excellent adhesion, which greatly improves the durability and practicality of the surface layer 6.

[0027] The metal mesh substrate 1 is made of aluminum alloy or magnesium alloy, and the porosity of the grid is 40~70%. The use of aluminum alloy or magnesium alloy as the metal mesh substrate 1 has the advantage of low density, which is the basis for achieving the overall lightweight of the grid. By setting the grid porosity in the range of 40~70%, the weight of the substrate itself is reduced to the maximum extent while ensuring the structural strength and functional requirements of the grid, and the lightweight performance of the entire product is further optimized.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A lightweight coated grating comprising a metal grid base body (1), and the outer side of the metal grid base body (1) is coated with a composite coating, characterized in that, The composite coating is configured from the inside out as a primer layer, a core layer (4), a transition layer (5), and a top layer (6). The primer layer includes a conversion layer (2) and a protective layer (3). The inner side of the conversion layer (2) and the outer side of the protective layer (3) are in contact with the outer side of the metal mesh substrate (1) and the inner side of the core layer (4), respectively. The conversion layer (2) is a nano-zirconium conversion agent coating. The protective layer (3) is a graphene-containing epoxy zinc-rich primer coating. The core layer (4) is a hollow ceramic microparticle modified polyurethane coating. The outer side of the core layer (4) is in contact with the inner side of the transition layer (5). The outer side of the transition layer (5) is in contact with the inner side of the top layer (6).

2. The lightweight coated grille according to claim 1, characterized in that: The transition layer (5) is a mica iron oxide epoxy coating.

3. The lightweight coated grille according to claim 1, characterized in that: The surface layer (6) is a photocatalytic fluorosilicone resin coating.

4. The lightweight coated grille according to claim 1, characterized in that: The core layer (4) has a thickness of 80~120μm, and the hollow ceramic microparticles have a particle size of 5~20μm.

5. The lightweight coated grille according to claim 1, characterized in that: The photocatalytic material of the surface layer (6) is nano-titanium dioxide.

6. The lightweight coated grille according to claim 1, characterized in that: The metal mesh substrate (1) is made of aluminum alloy or magnesium alloy, and the mesh porosity is 40~70%.

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