CN115889127A - Automobile part and preparation method thereof - Google Patents

Abstract

The application provides an automobile part and a preparation method thereof, and belongs to the technical field of spraying. The automobile part comprises a part base material, and a middle coating, a first varnish layer, a colored paint layer and a second varnish layer which are sequentially stacked and distributed on the surface of the part base material, wherein the surface of the automobile part is basically free of the problems of pinholes, depressions, paint orange peel and the like.

Description

Automobile part and preparation method thereof

Technical Field

The application relates to the technical field of spraying, in particular to an automobile part and a preparation method thereof.

Background

In the prior art, the surface of an automobile part is generally required to be painted, but the coating prepared by the existing spraying process has the problems of pinholes, depressions, painted orange peel and the like.

Disclosure of Invention

The application aims to provide an automobile part and a preparation method thereof, which can solve the problems of pinholes, depressions, painted orange peel and the like in a coating to a certain extent.

The embodiment of the application is realized as follows:

in a first aspect, embodiments of the present application provide an automobile component, which includes a component substrate, and a middle coating layer, a first clear paint layer, a colored paint layer, and a second clear paint layer, which are sequentially stacked and distributed on a surface of the component substrate.

Among the above-mentioned technical scheme, for the automobile parts that current spraying technology preparation obtained, the automobile parts that this application provided still additionally sets up one deck varnish layer between floating coat and colored paint layer, the setting of first varnish layer can improve the fillibility (especially part substrate surface has more pinhole and sunken material) to part substrate surface, thereby increase the roughness on coating surface, improve the pinhole and the sunken scheduling problem that coating surface exists, and simultaneously, the setting of first varnish layer can also improve the finish orange peel problem that coating surface exists, and then can effectively avoid automobile parts's surface blistering.

In some alternative embodiments, the automotive part satisfies at least one of the following conditions a-D:

a, the thickness of the middle coating is 35-45 μm;

b, the thickness of the first varnish layer is 30-55 μm;

c, the thickness of the colored paint layer is 6-20 μm;

and D, the thickness of the second varnish layer is 80-100 mu m.

In the technical scheme, the thickness of each functional layer is limited in the range, so that each functional layer has proper thickness, and each functional layer can be ensured to better exert respective function.

In some alternative embodiments, the component substrate is a component substrate comprising a fibrous material on a surface thereof;

optionally, the fibrous material includes at least one of carbon fibers and glass fibers.

Among the above-mentioned technical scheme, for the surface of part substrate is other materials, the surface of part substrate contains the fibre material (when the part substrate contains the fibre material, there are the fibre texture to show seriously, the more scheduling problem of surface gas pocket in the coating that conventional coating technology was made), and the setting of first varnish layer can play better filling and improve the effect of coating outward appearance.

Further, the scheme provided by the application is suitable for the various fiber systems, and more practical schemes can be provided, so that the scheme provided by the application is convenient to popularize and apply.

In some alternative embodiments, the automotive component further comprises a primer layer, the primer layer being distributed between the component substrate and the midcoat layer.

Among the above-mentioned technical scheme, the setting of priming paint layer can be modified the surface of part substrate to the preparation of the follow-up coating of being convenient for, simultaneously, the setting of priming paint layer also can play the effect of pre-filling, thereby can improve the pinhole, sunken and lacquer painting orange peel scheduling problem that the coating exists to a certain extent.

In some alternative embodiments, the automotive part is an automotive skin.

Among the above-mentioned technical scheme, the automobile housing is as the outmost functional unit of car, for other functional units, modifies its spraying layer and can play more effective effect.

In a second aspect, embodiments of the present application provide a method for preparing an automobile part, including the following steps:

providing a component substrate;

forming an intermediate coating layer on the surface of the component substrate;

forming a first varnish layer on the surface of the intermediate coating;

forming a colored paint layer on the surface of the first varnish layer;

and forming a second varnish layer on the surface of the colored varnish layer.

According to the technical scheme, the automobile part with the surface basically free of pinholes, depressions, painted orange peel and other problems can be prepared according to the preparation process.

In some alternative embodiments, the method of making an automotive part satisfies at least one of the following conditions E-G:

e, in the step of forming the middle coating, the leveling time after the slurry is sprayed is 15-30 min;

f, in the step of forming the first varnish layer, the leveling time is 15-30 min after the slurry is sprayed;

g, in the step of forming the colored paint layer, the leveling time after the slurry is sprayed is 5-15 min.

According to the technical scheme, in the leveling process of each functional layer, the leveling time is limited in the range, so that each functional layer has proper leveling time, and the surface flatness of each functional layer is guaranteed.

In some alternative embodiments, the method of making an automotive part satisfies at least one of the following conditions H and I:

h, in the step of forming the middle coating, the baking temperature after leveling is 60-80 ℃, and the baking time is 60-75 min;

i, in the step of forming the first varnish layer, the temperature of baking after leveling is 60-80 ℃, and the baking time is 60-75 min.

According to the technical scheme, in the baking process of each functional layer, the baking temperature and time are limited within the ranges, so that each functional layer has appropriate baking conditions, and the curing effect of each functional layer is guaranteed.

In some alternative embodiments, the method of making an automotive part satisfies at least one of the following conditions J-K:

j, in the step of forming the middle coating, the mesh number of sand paper used for polishing after baking is 600-800 #;

k, in the step of forming the first varnish layer, the mesh number of the sand paper used for polishing after baking is 600-800 #.

Among the above-mentioned technical scheme, in the process of polishing of each functional layer, inject the mesh number of abrasive paper in above-mentioned scope respectively, can guarantee that each functional layer has suitable surface roughness.

In some alternative embodiments, before the step of forming the intermediate coating layer, a step of forming a primer layer on the surface of the component substrate is further included.

In the technical scheme, the surface of the component substrate can be modified by adding the primer layer, so that the subsequent coating can be prepared conveniently, and meanwhile, the primer layer can also play a role in pre-filling.

In some alternative embodiments, the step of forming a second layer of clear paint on the surface of the pigmented paint layer comprises: firstly, a varnish layer is formed on the surface of the colored varnish layer, and then a varnish layer is formed on the surface of the varnish layer.

Among the above-mentioned technical scheme, the preparation of second varnish layer is gone on stage by stage, compares and only adopts a stage to go on, and automobile parts's outward appearance and quality homoenergetic obtain great promotion.

In some alternative embodiments, the thickness of the one layer of varnish is no greater than the thickness of the two layers of varnish;

optionally, the thickness of the first layer of varnish is 35-45 μm, and the thickness of the second layer of varnish is 45-55 μm.

Among the above-mentioned technical scheme, the thickness size on varnish one deck and the two layers of varnish sets up according to above-mentioned form, and further, prescribes a limit to above-mentioned scope respectively with the thickness on varnish one deck and the two layers of varnish, can make varnish one deck and the two layers of varnish all have suitable thickness to further promote the surface smoothness and the outward appearance of second varnish layer, and then promote automobile parts's outward appearance and quality more effectively.

In some alternative embodiments, in the step of forming a varnish one layer, at least one of the following conditions L to N is satisfied:

l, leveling time is 15-30 min after the slurry is sprayed;

m, after leveling, the baking temperature is 60-80 ℃, and the baking time is 60-75 min;

n, the mesh number of the sand paper used for polishing after baking is 1000-1500 #.

In the technical scheme, the parameters of each stage in the preparation process of the first varnish layer are respectively limited in the ranges, so that the varnish layer has more excellent comprehensive performance, and the comprehensive performance of the second varnish layer is further improved.

In some alternative embodiments, in the step of forming the varnish two layer, at least one of the following conditions O and P is satisfied:

o, leveling for 15-30 min after spraying the slurry;

p, the baking temperature after leveling is 60-80 ℃, and the baking time is 60-75 min.

In the technical scheme, the parameters of each stage in the preparation process of the second varnish layer are respectively limited in the ranges, so that the two varnish layers have more excellent comprehensive performance, and the comprehensive performance of the second varnish layer is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of an automotive component according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another automotive component provided in an embodiment of the present application;

FIG. 3 is a process flow diagram of a method for manufacturing an automotive part according to an embodiment of the present disclosure;

fig. 4 is a physical diagram of an appearance of an automobile part provided in embodiment 1 of the present application;

fig. 5 is a physical diagram of the appearance of an automobile part provided in comparative example 1 of the present application.

Icon: 1-automotive parts; 10-a component substrate; 20-a primer layer; 30-middle coating; 40-a first varnish layer; 50-a color paint layer; 60-second varnish layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.

It is to be noted that, in the description of the present application, the meaning of "a plurality" of "one or more" means two or more unless otherwise specified; the range of "numerical value a to numerical value b" includes both values "a" and "b", and "unit of measure" in "numerical value a to numerical value b + unit of measure" represents both "unit of measure" of "numerical value a" and "numerical value b".

An automobile part and a method for manufacturing the same according to the embodiments of the present application will be described in detail below.

In a first aspect, referring to fig. 1, the embodiment of the present application provides an automotive component 1, which includes a component substrate 10, and a midcoat layer 30, a first varnish layer 40, a color paint layer 50, and a second varnish layer 60 sequentially stacked and distributed on a surface of the component substrate 10.

In this application, for the automobile part 1 that current spraying technology prepared and obtained, the automobile part 1 that this application provided still additionally sets up one deck varnish layer between floating coat 30 and colored paint layer 50, the setting of first varnish layer 40 can improve the fillibility (especially part substrate 10 surface has more pinhole and sunken material) to part substrate 10 surface, thereby increase the roughness on coating surface, improve the pinhole and the sunken scheduling problem that coating surface exists, and simultaneously, the setting of first varnish layer 40 can also improve the finish orange peel problem that coating surface exists, and then can effectively avoid automobile part 1's surface blistering.

The main raw materials of the functional layers are not limited, and may be selected according to conventional arrangements in the art.

As an example, the main raw materials of the middle coating layer 30 include polyurethane resin, titanium dioxide, and filler.

As an example, the main raw materials of the varnish layer include acrylic resin, sag resistant resin, ultraviolet absorber, and isocyanate.

As an example, the main raw materials of the colored paint layer 50 include polyester resin, polyurethane resin, amino resin, epoxy resin, color paste, and aluminum powder.

It should be noted that the thickness of each functional layer is not limited, and can be adjusted according to actual needs.

As an example, the automobile part 1 satisfies at least one of the following conditions a to D:

a, the thickness of the middle coating layer 30 is 35-45 μm, such as but not limited to any one or a range between any two of 35 μm, 38 μm, 40 μm, 42 μm and 45 μm;

b, the thickness of the first varnish layer 40 is 30 to 55 μm, such as but not limited to any one or a range of values between any two of 30 μm, 31 μm, 32 μm, 33 μm and 34 μm;

c, the thickness of the color paint layer 50 is 6 to 20 μm, such as but not limited to any one or a range between any two of 6 μm, 10 μm, 12 μm, 14 μm, 16 μm, 18 μm and 20 μm;

d, the thickness of the second varnish layer 60 is 80 to 100 μm, such as, but not limited to, any one or a range of values between 80 μm, 85 μm, 90 μm, 95 μm and 100 μm.

In this embodiment, the thickness of each functional layer is limited to the above range, and each functional layer can have an appropriate thickness, thereby ensuring that each functional layer can exhibit its own function well.

Note that the material of the component substrate 10 is not limited as long as a surface has a defect (for example, a pinhole or a depression).

The component substrate 10 is a component substrate 10 having a surface containing a fiber material, and the component substrate 10 may be a material containing only a fiber, or may be a composite material containing a fiber, for example, a composite material containing a fiber and a plastic;

optionally, the fibrous material comprises at least one of carbon fibers and glass fibers.

In this embodiment, the surface of the component substrate 10 includes a fibrous material (when the component substrate includes a fibrous material, the coating layer produced by the conventional coating process has problems such as a serious fiber texture and many surface pores), and the first varnish layer 40 is provided to achieve a better filling effect and an improvement effect on the appearance of the coating layer.

Further, the scheme provided by the application is suitable for the various fiber systems, and more practical schemes can be provided, so that the scheme provided by the application is convenient to popularize and apply.

It will be appreciated that the structure of the coating may be optimised with regard to the appearance of the automotive part 1 and the ease of preparation of the coating.

Referring to fig. 2, as an example, automotive component 1 further includes a primer layer 20, the primer layer 20 being disposed between component substrate 10 and a midcoat layer 30.

In this embodiment, the primer layer 20 is disposed to modify the surface of the component substrate 10, so as to facilitate the preparation of the subsequent coating, and the primer layer 20 also serves as a pre-filling function, so as to improve the problems of pinholes, depressions, and orange peel on the painted surface of the coating to some extent.

The main raw material of the primer layer 20 is not limited, and may be selected according to conventional arrangements in the art.

As an example, the primary raw material of the primer layer 20 includes a two-component polyurethane material.

The preparation process of the primer layer 20 is not limited, and may be performed according to a conventional procedure in the art.

It is understood that the specification of the sandpaper for sanding may be defined in consideration of the surface roughness of the primer layer 20.

As an example, the mesh number of the sandpaper used for sanding the primer layer 20 is 500-700 #.

It should be noted that the type of the automobile component 1 is not limited, and can be adjusted according to actual needs.

As an example, the automotive part 1 is an automotive housing.

In this embodiment, the automobile outer shell serves as the outermost functional unit of the automobile, and the sprayed layer thereof is modified more effectively than other functional units.

In a second aspect, embodiments of the present application provide a method for preparing an automobile part, including the following steps:

providing a component substrate;

forming an intermediate coating layer on the surface of the component substrate;

forming a first varnish layer on the surface of the intermediate coating;

forming a colored paint layer on the surface of the first varnish layer;

and forming a second varnish layer on the surface of the colored varnish layer.

According to the preparation method, the automobile parts with the surfaces basically free of pinholes, depressions, painted orange peels and other problems can be prepared according to the preparation method.

It should be noted that the specific preparation process of each functional layer is not limited, and can be performed according to the conventional operation in the art.

As an example, the preparation of the middle coat includes slurry spraying, leveling, baking, and polishing in sequence.

As an example, the preparation of the first varnish layer includes sequentially performing slurry spraying, leveling, baking and polishing.

As an example, the preparation of the pigmented paint layer comprises the sequential spraying of the slurry and leveling.

As an example, the preparation of the second varnish layer comprises sequentially spraying the slurry, leveling, baking and grinding.

It should be noted that the preparation process of the colored paint layer is not limited, and the colored paint layer can be prepared at one time or in stages.

As an example, the preparation of the colored paint layer includes forming a first colored paint layer on the surface of the first clear paint layer, and then forming a second colored paint layer on the surface of the first colored paint layer.

It should be noted that, the thicknesses of the first colored paint layer and the second colored paint layer are not limited, and can be adjusted according to actual needs.

As an example, the thickness of one layer of color paint is the same as the thickness of the two layers of color paint.

It should be noted that the leveling time of each functional layer is not limited, and may be limited according to actual needs.

As an example, the method for producing an automobile part satisfies at least one of the following conditions E to G:

e, in the step of forming the middle coating, the leveling time after the slurry is sprayed is 15-30 min, such as but not limited to the time of any one of the values of 15min, 20min, 25min and 30min or the range value between any two values;

f, in the step of forming the first varnish layer, the leveling time after the slurry is sprayed is 15-30 min, such as but not limited to the time of any one of 15min, 20min, 25min and 30min or the value in the range between any two values;

and G, in the step of forming the colored paint layer, the leveling time after the slurry is sprayed is 5-15 min, such as but not limited to the time of any one point value of 5min, 10min and 15min or the range value between any two values.

In this embodiment, in the leveling process of each functional layer, the leveling time is limited to the above range, so that each functional layer has an appropriate leveling time, thereby ensuring the surface flatness of each functional layer.

It should be noted that the baking parameters of the functional layers are not limited, and may be limited according to actual needs.

As an example, the method of manufacturing an automobile part satisfies at least one of the following conditions H and I:

h, in the step of forming the intermediate coating, the temperature of the post-leveling baking is 60-80 ℃, such as but not limited to, the temperature is any one of 60 ℃, 65 ℃, 70 ℃, 75 ℃ and 80 ℃ or the range value between any two; the baking time is 60-75 min, such as but not limited to, the time is any one of the values of 60min, 65min, 70min and 75min or the range value between any two values;

i, in the step of forming the first varnish layer, the temperature of post-leveling baking is 60 to 80 ℃, such as but not limited to, any one of 60 ℃, 65 ℃, 70 ℃, 75 ℃ and 80 ℃ or a range value between any two; the baking time is 60-75 min, such as but not limited to, the time is any one of 60min, 65min, 70min and 75min or a range value between any two.

In this embodiment, in the baking process of each functional layer, the baking temperature and time are respectively limited to the above ranges, so that each functional layer can have an appropriate baking condition, thereby ensuring the curing effect of each functional layer.

It should be noted that the mesh number of the polishing sandpaper of each functional layer is not limited, and can be limited according to actual needs.

As an example, the method of manufacturing an automobile part satisfies at least one of the following conditions J to K:

j, in the step of forming the intermediate coating, the mesh number of the sand paper used for grinding after baking is 600-800 #, such as but not limited to any one of the mesh numbers 600#, 650#, 700#, 750# and 800#, or the range value between any two;

and K, in the step of forming the first varnish layer, the mesh number of the sand paper used for sanding after baking is 600-800 #, such as but not limited to any one of the mesh numbers 600#, 650#, 700#, 750# and 800#, or a range value between any two.

In this embodiment, in the polishing process of each functional layer, the mesh number of the sandpaper is limited to the above range, and it is possible to ensure that each functional layer has appropriate surface roughness.

As an example, before the step of forming the intermediate coating layer, a step of forming a primer layer on the surface of the component substrate is further included.

In this embodiment, the addition of the primer layer can modify the surface of the component substrate to facilitate the preparation of subsequent coatings, and the primer layer can also be pre-filled.

As an example, the step of forming a second varnish layer on the surface of the colored varnish layer includes: firstly, a varnish layer is formed on the surface of the colored varnish layer, and then a varnish layer is formed on the surface of the varnish layer.

In this embodiment, the preparation of the second varnish layer is carried out in stages, and the appearance and quality of the automobile part can be greatly improved compared with the case where only one stage is adopted.

In other possible embodiments, the preparation of the second varnish layer can also be carried out in only one stage.

It should be noted that the related process performed in one stage is not limited, and the related process performed in stages may be referred to.

It should be noted that the thicknesses of the varnish layer and the varnish layer are not limited, and can be adjusted according to actual needs.

As an example, the thickness of one layer of varnish is no greater than the thickness of two layers of varnish;

optionally, the varnish layer has a thickness of 35 to 45 μm, such as but not limited to any one or a range between any two of 35 μm, 38 μm, 40 μm, 42 μm and 45 μm; the thickness of the varnish two layers is 45-55 μm, such as but not limited to, the thickness is any one of 45 μm, 48 μm, 50 μm, 52 μm and 55 μm or the range value between any two.

In this embodiment, the thickness of the first varnish layer and the second varnish layer is set in the above manner, and further, the thickness of the first varnish layer and the thickness of the second varnish layer are respectively limited to the above ranges, so that the first varnish layer and the second varnish layer can both have appropriate thicknesses, thereby further improving the surface flatness and appearance of the second varnish layer, and further more effectively improving the appearance and quality of the automobile component.

It should be noted that, in the preparation process of the varnish layer, each parameter is not limited, and can be adjusted according to actual needs.

As an example, in the step of forming a varnish one layer, at least one of the following conditions L to N is satisfied:

l, the leveling time after the slurry is sprayed is 15-30 min, such as but not limited to, the time is any one of the values of 15min, 20min, 25min and 30min or the range value between any two values;

m, the temperature of the post-leveling baking is 60-80 ℃, for example, but not limited to, the temperature is any one of 60 ℃, 65 ℃, 70 ℃, 75 ℃ and 80 ℃ or the range value between any two; the baking time is 60-75 min, such as but not limited to, the baking time is any one or a range between any two of 60min, 65min, 70min and 75min;

n, the mesh number of the sand paper used for grinding after baking is 1000-1500 #, such as but not limited to any one of the mesh numbers 1000#, 1100#, 1200#, 1300#, 1400# and 1500#, or the range value between any two.

In the embodiment, the parameters of each stage in the preparation process of the first varnish layer are respectively limited in the ranges, so that a varnish layer has more excellent comprehensive performance, and the comprehensive performance of the second varnish layer is improved.

It should be noted that, in the preparation process of the second layer of the varnish, each parameter is not limited, and can be adjusted according to actual needs.

As an example, in the step of forming the varnish two layer, at least one of the following conditions O and P is satisfied:

o, the leveling time after the slurry is sprayed is 15-30 min, such as but not limited to, the time is any one of the values of 15min, 20min, 25min and 30min or the range value between any two values;

p, the post-leveling bake temperature is 60 to 80 ℃, for example but not limited to, at any one or a range of values between 60 ℃, 65 ℃, 70 ℃, 75 ℃ and 80 ℃; the baking time is 60-75 min, such as but not limited to, the time is any one of 60min, 65min, 70min and 75min or a range value between any two.

In the embodiment, the parameters of each stage in the preparation process of the second varnish layer are respectively limited in the ranges, so that the second varnish layer has more excellent comprehensive performance, and the comprehensive performance of the second varnish layer is improved.

It should be noted that processes and steps not specifically described or limited in the preparation of the automobile parts may be performed according to the conventional operations in the art.

As an example, a process flow diagram of a method of making an automotive part is illustrated with reference to fig. 3.

The features and properties of the present application are described in further detail below with reference to examples.

Example 1

The embodiment of the application provides a preparation method of an automobile part, which comprises the following steps:

providing a carbon fiber substrate, forming a primer layer on the surface of the carbon fiber substrate, wherein the specification of abrasive paper for polishing the primer layer is 600#.

Spraying the preparation slurry of the middle coating on the surface of the primer layer, and then sequentially carrying out leveling, baking and polishing to form the middle coating, wherein the leveling time is 20min, the baking temperature is 70 ℃, the baking time is 70min, the specification of the abrasive paper is 700#, and the thickness of the middle coating is 38 mu m.

Spraying the preparation slurry of the first clear coat layer on the surface of the middle coat layer, and then, sequentially leveling, baking and polishing to form the first clear coat layer, wherein the leveling time is 20min, the baking temperature is 70 ℃, the baking time is 70min, the specification of the abrasive paper is 700#, and the thickness of the middle coat layer is 40 μm.

Spraying a layer of colored paint preparation slurry on the surface of the first clear paint layer, and then leveling for 10min to form a layer of colored paint, wherein the thickness of the layer of colored paint is 8 mu m; and then spraying the preparation slurry of the second colored paint layer on the surface of the first colored paint layer, and leveling for 10min to form the second colored paint layer, wherein the thickness of the second colored paint layer is 8 mu m.

Spraying slurry of a varnish layer on the surface of the second colored paint layer, and then sequentially leveling, baking and polishing to form the varnish layer, wherein the leveling time is 20min, the baking temperature is 70 ℃, the baking time is 70min, the specification of the abrasive paper is 1300#, and the thickness of the varnish layer is 40 mu m; and then spraying slurry of a second varnish layer on the surface of the first varnish layer, and then sequentially leveling and baking to form the second varnish layer, wherein the leveling time is 20min, the baking temperature is 70 ℃, the baking time is 70min, and the thickness of the second varnish layer is 50 mu m.

And after the preparation of the varnish layer is finished, inspecting and polishing the product to obtain a finished product.

Example 2

The embodiment of the application provides a preparation method of an automobile part, which comprises the following steps:

a primer layer is formed on the surface of the carbon fiber substrate, wherein the specification of abrasive paper for polishing the primer layer is 500#.

Spraying the preparation slurry of the middle coating on the surface of the primer layer, and then sequentially carrying out leveling, baking and polishing to form the middle coating, wherein the leveling time is 15min, the baking temperature is 60 ℃, the baking time is 75min, the specification of the abrasive paper is 600#, and the thickness of the middle coating is 35 mu m.

Spraying the preparation slurry of the first varnish layer on the surface of the middle coating, and then, sequentially leveling, baking and polishing to form the first varnish layer, wherein the leveling time is 15min, the baking temperature is 60 ℃, the baking time is 75min, the specification of the abrasive paper is 600#, and the thickness of the first varnish layer is 35 mu m.

Spraying a layer of colored paint preparation slurry on the surface of the first clear paint layer, and then leveling for 5min to form a layer of colored paint, wherein the thickness of the layer of colored paint is 6 microns; and then spraying the preparation slurry of the second colored paint layer on the surface of the first colored paint layer, and leveling for 5min to form the second colored paint layer, wherein the thickness of the second colored paint layer is 6 microns.

Spraying slurry of a varnish layer on the surface of the second colored paint layer, and then sequentially leveling, baking and polishing to form a varnish layer, wherein the leveling time is 15min, the baking temperature is 60 ℃, the baking time is 75min, the specification of sand paper is 1000#, and the thickness of the varnish layer is 35 mu m; and then spraying slurry of a second varnish layer on the surface of the first varnish layer, and then sequentially leveling and baking to form the second varnish layer, wherein the leveling time is 15min, the baking temperature is 60 ℃, the baking time is 75min, and the thickness of the second varnish layer is 45 mu m.

And after the preparation of the varnish layer is finished, inspecting and polishing the product to obtain a finished product.

Example 3

The embodiment of the application provides a preparation method of an automobile part, which comprises the following steps:

a primer layer is formed on the surface of the carbon fiber substrate, wherein the specification of abrasive paper for polishing the primer layer is 700#.

Spraying the preparation slurry of the middle coating on the surface of the primer layer, and then sequentially carrying out leveling, baking and polishing to form the middle coating, wherein the leveling time is 30min, the baking temperature is 80 ℃, the baking time is 60min, the specification of the abrasive paper is 800#, and the thickness of the middle coating is 40 mu m.

Spraying the preparation slurry of the first varnish layer on the surface of the middle coating, and then, sequentially leveling, baking and polishing to form the first varnish layer, wherein the leveling time is 30min, the baking temperature is 80 ℃, the baking time is 60min, the specification of the abrasive paper is 800#, and the thickness of the first varnish layer is 55 mu m.

Spraying a layer of colored paint preparation slurry on the surface of the first clear paint layer, and then leveling for 15min to form a layer of colored paint, wherein the thickness of the layer of colored paint is 10 mu m; and then spraying the preparation slurry of the second colored paint layer on the surface of the first colored paint layer, and leveling for 15min to form the second colored paint layer, wherein the thickness of the second colored paint layer is 10 microns.

Spraying slurry of a varnish layer on the surface of the second colored paint layer, and then sequentially leveling, baking and polishing to form the varnish layer, wherein the leveling time is 30min, the baking temperature is 80 ℃, the baking time is 60min, the specification of the abrasive paper is 1500#, and the thickness of the varnish layer is 45 mu m; and then spraying slurry of a second varnish layer on the surface of the first varnish layer, and then sequentially leveling and baking to form the second varnish layer, wherein the leveling time is 30min, the baking temperature is 80 ℃, the baking time is 60min, and the thickness of the second varnish layer is 55 mu m.

And after the preparation of the second varnish layer is finished, inspecting and polishing the product to obtain a finished product.

Example 4

The embodiment of the application provides a preparation method of an automobile part, which is different from the embodiment 1 in that:

and spraying the slurry of the second clear paint layer on the surface of the second colored paint layer, and then, sequentially leveling, baking and polishing to form the second clear paint layer, wherein the leveling time is 20min, the baking temperature is 70 ℃, the baking time is 70min, the specification of the abrasive paper is 1300#, and the thickness of the second clear paint layer is 90 mu m.

Comparative example 1

The comparative example of the present application provides a method for manufacturing an automobile part, which is different from example 1 in that:

and (3) directly forming a colored paint layer on the surface of the intermediate coating without preparing the first clear paint layer.

Test example 1

Surface appearance testing of automotive parts

The test method comprises the following steps:

the automobile components prepared in example 1 and comparative example 1 are numbered respectively, and then the appearance and the appearance of each sample are photographed and recorded respectively.

Referring to fig. 4 and 5, it can be seen that the surface of the automobile part prepared according to the method of example 1 of the present application is flat and free of defects and pores, while the surface of the automobile part prepared according to the method of comparative example 1 has more pores and defects, which indicates that the preparation process provided by the present application can improve the quality of the surface coating of the automobile part to some extent.

The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Claims (14)

1. The automobile part is characterized by comprising a part base material, and a middle coating, a first varnish layer, a colored varnish layer and a second varnish layer which are sequentially stacked and distributed on the surface of the part base material.

2. The automobile component according to claim 1, wherein at least one of the following conditions a to D is satisfied:

a, the thickness of the middle coating is 35-45 μm;

b, the thickness of the first varnish layer is 30-55 mu m;

c, the thickness of the colored paint layer is 6-20 mu m;

and D, the thickness of the second varnish layer is 80-100 mu m.

3. The automobile part according to claim 1 or 2, characterized in that the part base material is a part base material whose surface contains a fiber material;

optionally, the fibrous material includes at least one of carbon fiber and glass fiber.

4. The automotive component of claim 1 or 2, further comprising a primer layer disposed between the component substrate and the midcoat layer.

5. The automotive part of claim 1 or 2, wherein the automotive part is an automotive skin.

6. A method of making an automotive part, comprising the steps of:

providing a component substrate;

forming a middle coating layer on the surface of the component substrate;

forming a first varnish layer on the surface of the intermediate coating;

forming a colored paint layer on the surface of the first varnish layer;

and forming a second varnish layer on the surface of the colored varnish layer.

7. The production method according to claim 6, wherein at least one of the following conditions E to G is satisfied:

e, in the step of forming the middle coating, the leveling time after slurry spraying is 15-30 min;

f, in the step of forming the first varnish layer, the leveling time after the slurry is sprayed is 15-30 min;

and G, in the step of forming the colored paint layer, the leveling time after the slurry is sprayed is 5-15 min.

8. The production method according to claim 6, wherein at least one of the following conditions H and I is satisfied:

h, in the step of forming the middle coating, the baking temperature after leveling is 60-80 ℃, and the baking time is 60-75 min;

i, in the step of forming the first varnish layer, the temperature of baking after leveling is 60-80 ℃, and the baking time is 60-75 min.

9. The production method according to claim 6, wherein at least one of the following conditions J to K is satisfied:

j, in the step of forming the middle coating, the mesh number of sand paper used for polishing after baking is 600-800 #;

k, in the step of forming the first varnish layer, the mesh number of the sand paper used for polishing after baking is 600-800 #.

10. The production method according to any one of claims 6 to 9, characterized by further comprising a step of forming a primer layer on the surface of the component substrate before the step of forming the mid-coat layer.

11. The production method according to any one of claims 6 to 9, wherein the step of forming a second varnish layer on the surface of the varnish layer comprises: firstly forming a varnish layer on the surface of the colored varnish layer, and then forming a varnish layer on the surface of the varnish layer.

12. A producing method according to claim 11, characterized in that the thickness of said one layer of varnish is not more than the thickness of said two layers of varnish;

optionally, the thickness of the varnish layer is 35-45 μm, and the thickness of the varnish layer is 45-55 μm.

13. The production method according to claim 11, wherein in the step of forming the varnish one layer, at least one of the following conditions L to N is satisfied:

l, leveling time is 15-30 min after the slurry is sprayed;

m, after leveling, the baking temperature is 60-80 ℃, and the baking time is 60-75 min;

n, the mesh number of the sand paper used for polishing after baking is 1000-1500 #.

14. The production method according to claim 11, characterized in that, in the step of forming the varnish two layer, at least one of the following conditions O and P is satisfied:

o, leveling for 15-30 min after spraying the slurry;

p, the baking temperature after leveling is 60-80 ℃, and the baking time is 60-75 min.

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