Enclosure and method of making same, spray system

Abstract

A housing and its preparation method and spraying system are disclosed. The housing includes a substrate, an organic layer, a color layer, and a pearlescent layer. The color layer includes two or more color zones and at least one overlapping area. An overlapping area is provided between each pair of adjacent color zones, and the color zones and overlapping areas are arranged alternately. The overlapping area is configured to display a mixture of the colors displayed by two adjacent color zones. Each color zone is configured to display one color, and any two adjacent color zones display different colors. The organic layer is located between the substrate and the color layer, and the side of the organic layer closer to the color layer is in contact with the color layer. The pearlescent layer is located on the side of the color layer away from the substrate, and the side of the pearlescent layer closer to the substrate is in contact with the color layer. This method can solve the problems of existing housings having a single color appearance and unnatural transitions between different colors.

Description

Technical Field

[0001] This article relates to, but is not limited to, the field of surface treatment technology, and in particular to a shell and its preparation method, and a spraying system. Background Technology

[0002] Currently, the casings of electronic products are often made using vacuum coating technology, resulting in a single surface color, which is not conducive to presenting a rich variety of appearance effects for electronic products. Summary of the Invention

[0003] This disclosure provides a housing and its preparation method, as well as a spraying system, which can solve problems such as the existing housing having a single color and unnatural transitions between different colors.

[0004] On one hand, this disclosure provides a housing, including a substrate and an organic layer, a color layer, and a pearlescent layer located on the substrate; the color layer includes two or more color zones and at least one overlapping area, with the overlapping area provided between each pair of adjacent color zones, and the color zones and the overlapping area are arranged alternately in sequence, and the overlapping area is configured to display a mixed color of the colors displayed by two adjacent color zones; each color zone is configured to display a color, and any two adjacent color zones display different colors; The organic layer is located between the substrate and the color layer, and the side of the organic layer closer to the color layer is in contact with the color layer; the pearlescent layer is located on the side of the color layer away from the substrate, and the side of the pearlescent layer closer to the substrate is in contact with the color layer.

[0005] In some exemplary embodiments, all of the color zones display different colors.

[0006] In some exemplary embodiments, each of the overlapping regions has two dividing lines, and the two dividing lines are neither perpendicular to nor parallel to a first direction, which is parallel to the edge of the substrate.

[0007] In some exemplary embodiments, the two dividing lines are a first dividing line and a second dividing line, and the first dividing line has a first angle with the first direction, and the second dividing line has a second angle with the first direction, and the range of the first angle and the second angle is both between 40° and 50°.

[0008] In some exemplary embodiments, the orthographic projection area of ​​the overlapping area on the plane of the substrate is less than or equal to the orthographic projection area of ​​any one of the two color partitions adjacent to the overlapping area on the plane of the substrate.

[0009] In some exemplary embodiments, the thickness of the color layer ranges from 15 micrometers to 20 micrometers; and / or, the thickness of the organic layer ranges from 12 micrometers to 16 micrometers; and / or, the thickness of the pearlescent layer ranges from 12 micrometers to 16 micrometers.

[0010] In some exemplary embodiments, the material of the substrate includes a metal material or a plastic material.

[0011] In some exemplary embodiments, in a structure where the substrate material includes a metallic material, the housing further includes at least one of a passivation layer and a protective layer; in a structure where the substrate material includes a plastic material, the housing further includes a protective layer. The passivation layer is located between the substrate and the color layer, and the side of the passivation layer closer to the substrate is in contact with the substrate; the protective layer is farther away from the substrate than the passivation layer, the organic layer, the color layer and the pearlescent layer.

[0012] In some exemplary embodiments, the thickness of the passivation layer ranges from 8 micrometers to 12 micrometers; and / or, the thickness of the protective layer ranges from 18 micrometers to 25 micrometers.

[0013] In some exemplary embodiments, the housing satisfies at least one of the following conditions: The passivation layer includes a chromium coating layer; The organic layer is made of 80% transparent resin material; The pearlescent layer is made of polyhedral particles of metal oxide; The material of the protective layer includes talc.

[0014] On the other hand, embodiments of this disclosure provide a method for preparing a shell, comprising: An organic layer is formed on one side of the substrate; Install the substrate onto the mounting bracket; The substrate is coated using at least two spray gun assemblies configured to sequentially coat the substrate to form a color layer, with each adjacent coat using a different color. Each spray gun assembly coats the substrate to form a coating area, and adjacent coating areas form an overlapping coating area. Each coating area includes a color partition formed on the substrate, and each overlapping coating area includes an overlapping area formed on the substrate. The color partitions and overlapping areas are arranged alternately, and the overlapping area is configured to display a mixture of the colors displayed by two adjacent color partitions. Each color partition is configured to display a single color, and any two adjacent color partitions display different colors. A pearlescent layer is formed on the side of the color layer away from the substrate.

[0015] In some exemplary embodiments, the hanger is configured to move the substrate along a moving direction, and the at least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: The at least two spray gun assemblies are arranged sequentially along the moving direction. After one of the at least two spray gun assemblies is sprayed with a color, the hanger moves the substrate, and the other of the at least two other spray gun assemblies is sprayed with a different color.

[0016] In some exemplary embodiments, mounting the substrate to the hanger includes: Two substrates are mounted to the hanger at a 90-degree angle to each other, and the hanger is configured to move and rotate the substrates. At least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: After the spray gun assembly sprays one of the two substrates, the hanger drives the substrate to rotate, and the spray gun assembly sprays the other of the two substrates. The hanger moves the substrate to the next spray gun assembly.

[0017] In some exemplary embodiments, the projected area of ​​the overlapping sprayed area on the plane of the substrate is less than or equal to 50% of the projected area of ​​any one of the two adjacent sprayed areas on the plane of the substrate.

[0018] In some exemplary embodiments, mounting the substrate to the hanger includes: tilting the substrate.

[0019] In some exemplary embodiments, before forming an organic layer on one side of the substrate, the preparation method further includes: chemically intervening in the material to form a passivation layer and the substrate.

[0020] In some exemplary embodiments, after forming the pearlescent layer, the preparation method further includes forming a protective layer on the side of the pearlescent layer away from the substrate.

[0021] On the other hand, this disclosure provides a spraying system applied to the shell preparation method described in any of the foregoing embodiments. The spraying system includes the hanger, the spray gun assembly, and a power unit, and the power unit is electrically connected to the hanger and the spray gun assembly.

[0022] Other features and advantages of this disclosure will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the disclosure. Other advantages of this disclosure may be realized and obtained by means of the methods described in the description and the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings are used to provide an understanding of the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0024] Figure 1 This is a schematic diagram of the structure of a housing according to an embodiment of the present disclosure; Figure 2 This is a planar schematic diagram of a color layer according to an embodiment of the present disclosure; Figure 3A This is a schematic diagram of the shell after chemical intervention treatment according to an embodiment of the present disclosure. Figure 1 ; Figure 3B This is a schematic diagram of the shell after chemical intervention treatment according to an embodiment of the present disclosure. Figure 2 ; Figure 4 This is a schematic diagram of the formation of a first coating area on the housing according to an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the second coating area formed on the housing according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the formation of a third coating area on the housing according to an embodiment of the present disclosure; Figure 7 This is a schematic diagram of the fourth coating area formed on the housing according to an embodiment of the present disclosure; Figure 8 This is a schematic diagram of the fifth coating area formed on the housing according to an embodiment of the present disclosure; Figure 9 This is an enlarged schematic diagram of the material used to form the pearlescent layer on the shell according to an embodiment of this disclosure; Figure 10 This is an enlarged schematic diagram of the material used to form the protective layer of the housing according to an embodiment of this disclosure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The implementation can be carried out in many different forms. Those skilled in the art will readily understand that the methods and content can be transformed into one or more forms without departing from the spirit and scope of this disclosure. Therefore, this disclosure should not be construed as limited to the content described in the following embodiments. Without conflict, the embodiments and features in the embodiments of this disclosure can be arbitrarily combined with each other.

[0026] In the accompanying drawings, the size of one or more constituent elements, the thickness of layers, or areas are sometimes exaggerated for clarity. Therefore, this disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0027] The ordinal numbers such as "first," "second," and "third" in this disclosure are used to avoid confusion among the constituent elements, not to limit the quantity. "Multiple" in this disclosure includes two or more quantities.

[0028] In this disclosure, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification of the specification, and does not imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately changed depending on the direction in which the constituent elements are described. Therefore, the description is not limited to the terms used in the specification and may be appropriately replaced as appropriate.

[0029] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of these terms in this disclosure as appropriate.

[0030] In this disclosure, "electrical connection" includes the situation where constituent elements are connected together by a component having a certain electrical function. There are no particular limitations on the "component having a certain electrical function," as long as it enables the transmission of electrical signals between the connected constituent elements. Examples of "component having a certain electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components having one or more functions.

[0031] In this disclosure, "parallel" refers to a state in which the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore can include a state in which the angle is greater than or equal to -5° and less than 5°. Furthermore, "perpendicular" refers to a state in which the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore can include a state in which the angle is greater than or equal to 85° and less than 95°.

[0032] In this disclosure, the terms "film" and "layer" can be interchanged. For example, sometimes "conductive layer" can be replaced with "conductive film". Similarly, sometimes "insulating film" can be replaced with "insulating layer".

[0033] In this disclosure, “about” means a value that is not strictly limited and allows for process and measurement errors.

[0034] This disclosure provides a housing, including a substrate and an organic layer, a color layer, and a pearlescent layer located on the substrate; the color layer includes two or more color zones and at least one overlapping area, with the overlapping area provided between each pair of adjacent color zones, and the color zones and the overlapping area are arranged alternately in sequence, and the overlapping area is configured to display a mixture of the colors displayed by two adjacent color zones; each color zone is configured to display one color, and any two adjacent color zones display different colors; The organic layer is located between the substrate and the color layer, and the side of the organic layer closer to the color layer is in contact with the color layer; the pearlescent layer is located on the side of the color layer away from the substrate, and the side of the pearlescent layer closer to the substrate is in contact with the color layer.

[0035] The housing provided in this embodiment achieves a natural transition between different colors by setting an overlapping area and a pearlescent layer between two adjacent color zones, and by arranging the color zones and overlapping areas alternately, thus improving the appearance quality of the housing. Furthermore, by setting an organic layer, which can be linked to both the color layer on the side away from the substrate and the side closer to the substrate, a bidirectional link and covalent reaction are achieved, enhancing the adhesion between the substrate and the color layer.

[0036] Figure 1 This is a schematic diagram of the structure of a housing according to an embodiment of the present disclosure. Figure 1As shown, in the embodiments of this disclosure, three directions are defined, with the first direction labeled X, the second direction labeled Y, and the third direction labeled Z, and the three directions are mutually perpendicular. This disclosure provides a housing, the plane of which is parallel to the plane formed by the first direction X and the second direction Y. The housing can be used in electronic products such as mobile phones and computers. This disclosure does not limit the specific product to which the housing is applied. The housing may include a substrate 10 and a passivation layer 11, an organic layer 12, a color layer 13, a pearlescent layer 14, and a protective layer 15 stacked on the substrate 10. The material of the substrate 10 may include metallic or plastic materials. For example, the metallic material may be an aluminum alloy, such as a 5-series or 6-series aluminum alloy. 5-series aluminum alloys are aluminum alloys with magnesium as the main alloying element, such as 5052 or 5252. 6-series aluminum alloys are a class of aluminum alloys composed of elements such as aluminum, magnesium, and silicon, such as 6061 or 6063. The plastic material can be PC+ABS. PC+ABS is a thermoplastic alloy made of polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS). It combines the high impact strength and high heat distortion temperature of PC with the good processability and surface gloss of ABS, making it suitable for use as a casing material for electronic products. The material of the passivation layer 11 may include metallic elements such as chromium. The materials of the organic layer 12 and the pearlescent layer 14 may include resins, etc., and the protective layer 15 may include a UV coating layer, etc.

[0037] Color layer 13 may include two or more color partitions, each displaying a different color. For example, color layer 13 may include two color partitions, or three color partitions, or four color partitions, or five color partitions, etc. This embodiment does not limit the number of color partitions included in color layer 13; the specific number of color partitions can be adaptively adjusted according to the application scenario of the product. Taking color layer 13 with five color partitions as an example, the five color partitions are a first color partition 13-1, a second color partition 13-2, a third color partition 13-3, a fourth color partition 13-4, and a fifth color partition 13-5. The first color partition 13-1 displays a first color, the second color partition 13-2 displays a second color, the third color partition 13-3 displays a third color, the fourth color partition 13-4 displays a fourth color, and the fifth color partition 13-5 displays a fifth color. The first, second, third, fourth, and fifth colors are all different.

[0038] Figure 2 This is a planar schematic diagram of a color layer according to an embodiment of the present disclosure. Figure 2As shown, color layer 13 may further include at least one overlapping area located between two adjacent color zones. The overlapping area is configured to display a mixture of colors displayed by the two adjacent color zones. Each overlapping area has two boundary lines, namely a first boundary line L1 and a second boundary line L2, which are not perpendicular to or parallel to the first direction X, and the second boundary line L2 is also not perpendicular to or parallel to the first direction X. For example, the first boundary line L1 and the second boundary line L2 may be parallel to each other. Alternatively, the first boundary line L1 and the second boundary line L2 may be approximately straight wavy lines. Alternatively, the first boundary line L1 and the second boundary line L2 may be straight lines. Alternatively, the first boundary line L1 and the second boundary line L2 may be curves. For example, the first direction X may be parallel to an edge line of the housing. In the embodiments of this disclosure, both boundary lines are straight lines as an example; however, this disclosure does not limit the shape of the boundary lines.

[0039] A first dividing line L1 has a first included angle α1 with the first direction X, and a second dividing line L2 has a second included angle α2 with the first direction X. Both the first included angle α1 and the second included angle α2 are within the range of 40° to 50°, and the first included angle α1 and the second included angle α2 may be equal or unequal. For example, the first included angle α1 may be equal to the second included angle α2, and both are 45°. In this embodiment, when the first dividing line L1 is a non-linear structure, the first included angle α1 is the angle between the tangent line passing through any point on the first dividing line L1 and the first direction X. When the second dividing line L2 is a non-linear structure, the second included angle α2 is the angle between the tangent line passing through any point on the second dividing line L2 and the first direction X.

[0040] like Figure 2As shown, taking color layer 13, which includes five color zones and four overlapping zones, as an example, the four overlapping zones are the first overlapping zone JD1, the second overlapping zone JD2, the third overlapping zone JD3, and the fourth overlapping zone JD4. The first overlapping zone JD1 is located between the first color zone 13-1 and the second color zone 13-2, and is configured to display a mixture of the colors displayed in the first color zone 13-1 and the second color zone 13-2. For example, the color displayed in the first overlapping zone JD1 could be a mixture of 90% of the material displayed in the first color zone 13-1 and 10% of the material displayed in the second color zone 13-2. Alternatively, the color displayed in the first overlapping zone JD1 could be a mixture of 70% of the material displayed in the first color zone 13-1 and 30% of the material displayed in the second color zone 13-2, and so on. The second overlapping area JD2 is located between the second color partition 13-2 and the third color partition 13-3. The second overlapping area JD2 is configured to display a mixed color of the colors displayed in the second color partition 13-2 and the third color partition 13-3. For example, the color displayed in the second overlapping area JD2 may be a mixture of 90% of the material displayed in the second color partition 13-2 and 10% of the material displayed in the third color partition 13-3. Alternatively, the color displayed in the second overlapping area JD2 may be a mixture of 70% of the material displayed in the second color partition 13-2 and 30% of the material displayed in the third color partition 13-3, etc. The third overlapping area JD3 is located between the third color partition 13-3 and the fourth color partition 13-4. The third overlapping area JD3 is configured to display a mixed color of the colors displayed in the third color partition 13-3 and the fourth color partition 13-4. For example, the color displayed in the third overlapping area JD3 can be a mixture of 90% of the material displayed in the third color partition 13-3 and 10% of the material displayed in the fourth color partition 13-4. Alternatively, the color displayed in the third overlapping area JD3 can be a mixture of 70% of the material displayed in the third color partition 13-3 and 30% of the material displayed in the fourth color partition 13-4, etc. The fourth overlapping area JD4 is located between the fourth color partition 13-4 and the fifth color partition 13-5, and is configured to display a mixture of the colors displayed in the fourth color partition 13-4 and the fifth color partition 13-5. For example, the color displayed in the fourth overlapping area JD4 can be a mixture of 90% of the material displayed in the fourth color partition 13-4 and 10% of the material displayed in the fifth color partition 13-5. Alternatively, the color displayed in the fourth overlapping area JD4 can be a mixture of 70% of the material displayed in the fourth color partition 13-4 and 30% of the material displayed in the fifth color partition 13-5, etc.

[0041] In this embodiment of the disclosure, by setting an overlapping area and placing the overlapping area between two adjacent color zones, and configuring the overlapping area to display a mixed color of the colors displayed by the two adjacent color zones, a soft and natural transition between different colors can be achieved, and the shell can present a low-saturation, multi-color gradient and highly integrated pattern and rich light and shadow effects.

[0042] In some exemplary embodiments, the color layer 13 includes at least one overlapping area located between two adjacent color zones. These two adjacent color zones can be referred to as the first adjacent color zone and the second adjacent color zone, respectively. The proportion of material displaying the color of the first adjacent color zone decreases sequentially towards the second adjacent color zone, while the proportion of material displaying the color of the second adjacent color zone increases sequentially, which is beneficial for a smooth transition of colors between the two color zones.

[0043] In some exemplary embodiments, the thickness of the color layer 13 can range from 15 micrometers to 20 micrometers.

[0044] In some exemplary embodiments, such as Figure 2 As shown, the orthographic projection area of ​​the overlapping area on the plane of the substrate 10 is less than or equal to the orthographic projection area of ​​either of the two adjacent color zones on the plane of the substrate 10. For example, the orthographic projection area of ​​the overlapping area on the plane of the substrate 10 is less than the orthographic projection area of ​​both adjacent color zones on the plane of the substrate 10. Alternatively, the orthographic projection area of ​​the overlapping area on the plane of the substrate 10 is equal to the orthographic projection area of ​​both adjacent color zones on the plane of the substrate 10. Alternatively, the orthographic projection area of ​​the overlapping area on the plane of the substrate 10 is less than the orthographic projection area of ​​one of the two adjacent color zones on the plane of the substrate 10, and the orthographic projection area of ​​the overlapping area on the plane of the substrate 10 is equal to the orthographic projection area of ​​the other of the two adjacent color zones on the plane of the substrate 10. In this embodiment, by defining the relationship between the orthographic projection areas of the overlapping area and the two adjacent color zones, the generation of other hues can be avoided, thus ensuring the quality of the product's appearance.

[0045] In some exemplary embodiments, all color zones of the housing display different colors.

[0046] In some exemplary embodiments, the color layer includes two or more color zones and at least one overlapping area, with the color zones and overlapping areas arranged alternately in a predetermined direction. For example, the predetermined direction may be parallel to a first direction X, or the predetermined direction may form an acute angle with the first direction X. This disclosure does not limit the predetermined direction; the predetermined direction can be adjusted according to the actual design of the housing.

[0047] The following example illustrates the structure of the housing through its fabrication process. The housing is fabricated using a spraying system, which includes at least a mounting bracket, multiple spray guns, and a power unit. The power unit is electrically connected to the mounting bracket and the spray guns, and provides power to them. Taking a housing with five color zones as an example, the fabrication process may include the following steps:

[0048] (01) Perform preliminary processing on the material. Preliminary processing may include cutting, cleaning, drying and aging treatment. For example, the material may be 5 series aluminum alloy. Aluminum alloy has very high hardness during machining. After machining, aging treatment can make the aluminum alloy present a T6 state. The T6 state is an ideal hardness state of aluminum alloy, which is beneficial to ensuring the quality of the obtained shell.

[0049] (02) Chemical intervention treatment of the materials, such as Figure 3A , Figure 3B As shown. Chemical intervention treatment may include: placing the entire material in a solution containing chromate for passivation treatment, applying a 12V current to the solution, and using electrochemical principles to activate the material, such as aluminum alloy, to form a chromate layer, which is the passivation layer 11. The portion of the material excluding the formed passivation layer 11 becomes the substrate 10. Subsequently, the material is placed in a mixed solution containing sodium hydroxide and potassium permanganate for neutralization. Then, the material is removed from the mixed solution of sodium hydroxide and potassium permanganate, rinsed with water, and subsequently dried at high temperature. In some examples, the passivation layer 11 may also include other film layers besides the chromate layer; this disclosure is not limited to this. Chemical intervention treatment is not required when the material is a plastic material.

[0050] Chemical treatment of the substrate can reduce the surface activity of the passivation layer 11, making it less susceptible to oxidation in the natural environment. It also enhances the adhesion of the material surface, facilitating the adhesion of subsequent film layers and improving the processing performance of the passivation layer. For example, the concentration of the chromate solution can be 250 g / L. For example, sulfuric acid can be added to the chromate solution. For example, chemical treatment of the substrate can completely prevent the passivation layer 11 from direct contact with air for 24 hours.

[0051] In some exemplary embodiments, the thickness of the passivation layer 11 can range from 8 micrometers to 12 micrometers; for example, the thickness of the passivation layer 11 can be 10 micrometers. In embodiments of this disclosure, by designing the passivation layer, air can be blocked and the adhesion of post-treatment of the housing can be improved.

[0052] (03) Forming an organic layer. Forming an organic layer may include: placing the substrate 10 obtained in the aforementioned operation on a first operating table, the plane of which is parallel to the plane formed by the first direction X and the second direction Y, the first operating table being electrically connected to a power device, for example, the power device may include a motor, etc. The first operating table can be rotated 360° along an axis parallel to the third direction Z under the drive of the power device, and the first operating table returns to its position before rotation after rotation. In one example, the first operating table can be rotated N times 360° under the drive of the power device, where N is an integer greater than or equal to 2. During the process of the first operating table rotating the substrate 10 360°, the side of the substrate 10 with the passivation layer 11 formed is sprayed with a spray gun to form an organic layer 12 located on the side of the passivation layer 11 away from the substrate 10, the spraying time being approximately 4.0 seconds to 6.0 seconds. The spray gun can move at a speed of 800 cm / min along a direction parallel to the plane formed by the first direction X and the second direction Y. For example, the spray gun can move along the first direction X, or the spray gun can move along the second direction Y.

[0053] In some exemplary embodiments, the material of the organic layer 12 may include 80% transparent resin material, which serves to provide transparency. The thickness of the organic layer 12 can range from 12 micrometers to 16 micrometers. In embodiments of this disclosure, the organic layer can be linked to a color layer on the side away from the substrate and a passivation layer on the side closer to the substrate, respectively, to achieve bidirectional linkage and form a covalent reaction, thereby enhancing the adhesion between the substrate and the subsequently formed color layer.

[0054] (04) Forming the first spraying area PT1. In this embodiment of the present disclosure, taking the two substrates 10 obtained after the aforementioned operations as an example, they are hung on a hanger for spraying. Forming the first spraying area PT1 may include: hanging the two substrates 10 obtained after the aforementioned operations on a hanger, with the two substrates 10 crossing at a 90-degree angle, such as... Figure 4As shown. The hanger may include a first mounting plate and a second mounting plate, which intersect at a 90-degree angle. Both the first and second mounting plates are provided with mounting structures and positioning structures. For example, the mounting structure may include magnets, and the positioning structure may include limiting ribs. After the two substrates 10 obtained through the aforementioned operation are hung on the hanger, the two substrates 10 can be placed at a 90-degree angle by relying on the hanger. In this embodiment, the two substrates hung on the same hanger are respectively referred to as the first substrate 10-1 and the second substrate 10-2. The hanger can be electrically connected to a power device, and the hanger is configured to rotate along an axis parallel to the third direction Z under the drive of the power device, and can move along a direction parallel to the plane formed by the first direction X and the second direction Y. For example, it can move along the first direction X. In this embodiment, by using a hanger to simultaneously realize the spraying operation of two substrates, the spraying efficiency can be improved and the spraying cost can be reduced.

[0055] Subsequently, the first spray gun assembly 20 is used to spray the first substrate 10-1 to form the first sprayed area PT1, such as... Figure 4 As shown. Subsequently, the hanger is rotated 180 degrees using a power device, and then the first spray gun assembly 20 is used to spray the side of the second substrate 10-2 away from the first substrate 10-1 to form the first spray area PT1.

[0056] like Figure 4 As shown, the first spray gun assembly 20 may include at least one spray gun. For example, the first spray gun assembly 20 may include one spray gun, or the first spray gun assembly 20 may include two spray guns, etc. The number of spray guns included in the first spray gun assembly is not limited in this embodiment. The number of spray guns included in the first spray gun assembly can be adjusted according to the actual size of the housing. In this embodiment, it is taken as an example that each spray gun assembly includes two spray guns. The first spray gun assembly 20 includes a first spray gun 21 and a second spray gun 22. The structures of the first spray gun 21 and the second spray gun 22 may be the same. There is a distance H1 along the third direction Z between the first spray gun 21 and the second spray gun 22. The distance H1 can range from 10 cm to 17 cm. For example, the distance H1 can be 12 cm. For example, the first spray gun 21 is farther from the ground than the second spray gun 22. The second spray gun 22 has a spraying distance W1 with the first substrate 10-1 and the second substrate 10-2. The spraying distance W1 can range from 41 cm to 44 cm. In this embodiment, the ranges of distance H1 and distance W1 are merely illustrative. The distances H1 and W1 can be adaptively adjusted according to the actual size of the housing and the size of the sprayed area.

[0057] In some exemplary embodiments, the first spraying area PT1 includes a first color partition 13-1, and the orthographic projection area of ​​the first spraying area PT1 on the plane where the substrate 10 is located is larger than the orthographic projection area of ​​the first color partition 13-1 on the plane where the substrate 10 is located, so as to ensure that the area of ​​the first color partition and the first overlapping area on the appearance of the housing can avoid quality defects such as missed spraying. In the embodiments of this disclosure, the first spraying area is the spraying area formed by the first spray gun assembly spraying once.

[0058] In some exemplary embodiments, the material of the first spraying area PT1 may include 75% resin, 10% additives, and 15% first color paste.

[0059] In some exemplary embodiments, there is a distance H1 between the first spray gun 21 and the second spray gun 22 along the third direction Z, and the second spray gun 22 has a spraying distance W1 between the first substrate 10-1 and the second substrate 10-2. At least one of H1 and W1 can be changed to change the position of the first spraying area PT1.

[0060] In some exemplary embodiments, the substrate is mounted to the hanger at an angle. In this embodiment, "angled" means that the plane of the substrate is neither parallel nor perpendicular to the ground; for example, the plane of the substrate is at a 45-degree angle to the ground, or at a 30-degree angle. The angle of the substrate's plane can be adjusted by the clamping and placement position. In this embodiment, taking a 45-degree angle as an example, the substrate is at a 45-degree angle to the spray gun position on the automated production line.

[0061] (05) Forming the second sprayed area PT2. Forming the second sprayed area PT2 may include: using a power device to move the hanger to the position of the second spray gun assembly 30, using the second spray gun assembly 30 to spray the second substrate 10-2 to form the second sprayed area PT2, then using the power device to rotate the hanger 180 degrees, and then using the second spray gun assembly 30 to spray the side of the first substrate 10-1 away from the second substrate 10-2 to form the second sprayed area PT2, such as... Figure 5 As shown.

[0062] The second spray gun assembly 30 may include a third spray gun 33 and a fourth spray gun 34, which may have identical structures. A distance H2 exists between the third spray gun 33 and the fourth spray gun 34 along a third direction Z, the distance H2 ranging from 10 cm to 17 cm, for example, 15 cm. For example, the third spray gun 33 is farther from the ground than the fourth spray gun 34. The fourth spray gun 34 has a spraying distance W2 with respect to the first substrate 10-1 and the second substrate 10-2, the spraying distance W2 ranging from 41 cm to 44 cm, for example, 44 cm.

[0063] In some exemplary embodiments, the second spraying area PT2 includes a second color partition 13-2, and the orthographic projection area of ​​the second spraying area PT2 on the plane where the substrate 10 is located is larger than the orthographic projection area of ​​the second color partition 13-2 on the plane where the substrate 10 is located. This ensures that the areas of the second color partition, the first overlapping area, and the second overlapping area on the exterior of the housing are consistent, thus avoiding quality defects such as missed spraying. In this embodiment of the present disclosure, the second spraying area is the spraying area formed by one spraying operation of the second spray gun assembly.

[0064] In some exemplary embodiments, a first overlapping spray area JD11 exists between the first spray area PT1 and the second spray area PT2. The first overlapping spray area JD11 includes the first overlapping region JD1, which is the area located between the first boundary line L1 and the second boundary line L2 of the first overlapping region JD1 and covered by at least one of the first spray area PT1 and the second spray area PT2. The area of ​​the first overlapping spray area JD11 located on the substrate 10 serves as the first overlapping region JD1. The orthographic projection area of ​​the first overlapping spray area JD11 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the first spray area PT1 on the plane of the substrate 10, and the orthographic projection area of ​​the first overlapping spray area JD11 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the second spray area PT2 on the plane of the substrate 10. In this embodiment of the disclosure, by defining the area relationship between the overlapping sprayed area and the two adjacent sprayed areas, other hues can be avoided, thus ensuring the quality of the product's appearance.

[0065] In some exemplary embodiments, the material of the second spray zone PT2 may include 75% resin, 10% additives, and 15% second color paste.

[0066] In some exemplary embodiments, the second spraying area PT2 is located on one side of the line connecting the center point of the nozzle of the third spray gun 33 and the center point of the nozzle of the fourth spray gun 34.

[0067] In some exemplary embodiments, there is a distance H2 between the third spray gun 33 and the fourth spray gun 34 along the third direction Z, and the fourth spray gun 34 has a spraying distance W2 between the first substrate 10-1 and the second substrate 10-2. At least one of H2 and W2 can be changed to change the position of the second spraying area PT2.

[0068] (06) Forming the third spraying area PT3. Forming the third spraying area PT3 may include: using a power device to move the hanger to the position of the third spray gun assembly 40, and using the third spray gun assembly 40 to spray the first substrate 10-1 to form the third spraying area PT3, such as... Figure 6As shown. Subsequently, the hanger is rotated 180 degrees using a power device, and then the third spray gun assembly 40 is used to spray the side of the second substrate 10-2 away from the first substrate 10-1 to form the third spray area PT3.

[0069] The third spray gun assembly 40 may include a fifth spray gun 45 and a sixth spray gun 46, which may have identical structures. A distance H3 exists between the fifth spray gun 45 and the sixth spray gun 46 along a third direction Z, the distance H3 ranging from 10 cm to 17 cm; for example, the distance H3 may be 17 cm. For example, the fifth spray gun 45 is further from the ground than the sixth spray gun 46. The sixth spray gun 46 has a spraying distance W3 with respect to the first substrate 10-1 and the second substrate 10-2, the spraying distance W3 ranging from 41 cm to 44 cm; for example, the spraying distance W3 may be 44 cm.

[0070] In some exemplary embodiments, the third spraying area PT3 includes a third color partition 13-3, and the orthographic projection area of ​​the third spraying area PT3 on the plane where the substrate 10 is located is larger than the orthographic projection area of ​​the third color partition 13-3 on the plane where the substrate 10 is located. This ensures that the areas of the third color partition, the second overlapping area, and the third overlapping area on the exterior of the housing are consistent, thus avoiding quality defects such as missed spraying. In this embodiment of the present disclosure, the third spraying area is the spraying area formed by one spraying operation of the third spray gun assembly.

[0071] In some exemplary embodiments, a second overlapping sprayed area JD12 exists between the second sprayed area PT2 and the third sprayed area PT3. The second overlapping sprayed area JD12 includes the second overlapping area JD2, which is the area located between the first boundary line L1 and the second boundary line L2 of the second overlapping area JD2 and covered by at least one of the second sprayed area PT2 and the third sprayed area PT3. The area of ​​the second overlapping sprayed area JD12 located on the substrate 10 serves as the second overlapping area JD2. The orthographic projection area of ​​the second overlapping sprayed area JD12 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the second sprayed area PT2 on the plane of the substrate 10, and the orthographic projection area of ​​the second overlapping sprayed area JD12 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the third sprayed area PT3 on the plane of the substrate 10. In this embodiment of the disclosure, by defining the area relationship between the overlapping sprayed area and the two adjacent sprayed areas, other hues can be avoided, thus ensuring the quality of the product's appearance.

[0072] In some exemplary embodiments, the material of the third coating zone PT3 may include 75% resin, 10% additives, and 15% third color paste.

[0073] In some exemplary embodiments, the third spraying area PT3 is located on one side of the line connecting the center point of the nozzle of the fifth spray gun 45 and the center point of the nozzle of the sixth spray gun 46.

[0074] In some exemplary embodiments, there is a distance H3 between the fifth spray gun 45 and the sixth spray gun 46 along the third direction Z, and the sixth spray gun 46 has a spraying distance W3 between the first substrate 10-1 and the second substrate 10-2. At least one of H3 and W3 can be changed to change the position of the third spraying area PT3.

[0075] (07) Forming the fourth spraying area PT4. Forming the fourth spraying area PT4 may include: using a power device to move the hanger to the position of the fourth spray gun assembly 50, using the fourth spray gun assembly 50 to spray the second substrate 10-2 to form the fourth spraying area PT4, then using the power device to rotate the hanger 180 degrees, and then using the fourth spray gun assembly 50 to spray the side of the first substrate 10-1 away from the second substrate 10-2 to form the fourth spraying area PT4, such as... Figure 7 As shown.

[0076] The fourth spray gun assembly 50 may include a seventh spray gun 57 and an eighth spray gun 58, which may have identical structures. A distance H4 exists between the seventh spray gun 57 and the eighth spray gun 58 along a third direction Z, the distance H4 ranging from 10 cm to 17 cm, for example, 15 cm. For example, the seventh spray gun 57 is further from the ground than the eighth spray gun 58. The eighth spray gun 58 has a spraying distance W4 with respect to the first substrate 10-1 and the second substrate 10-2, the spraying distance W4 ranging from 41 cm to 44 cm, for example, 44 cm.

[0077] In some exemplary embodiments, the fourth spraying area PT4 includes a fourth color partition 13-4, and the orthographic projection area of ​​the fourth spraying area PT4 onto the plane of the substrate 10 is larger than the orthographic projection area of ​​the fourth color partition 13-4 onto the plane of the substrate 10. This ensures that the areas of the fourth color partition, the third overlapping area, and the fourth overlapping area on the shell appearance are consistent, thus avoiding quality defects such as missed spraying. In this embodiment of the present disclosure, the fourth spraying area is the spraying area formed by one spraying operation of the fourth spray gun assembly.

[0078] In some exemplary embodiments, a third overlapping spraying area JD13 exists between the third spraying area PT3 and the fourth spraying area PT4. The third overlapping spraying area JD13 includes the third overlapping area JD3, which is the area located between the first boundary line L1 and the second boundary line L2 of the third overlapping area JD3 and covered by at least one of the third spraying area PT3 and the fourth spraying area PT4. The area of ​​the third overlapping spraying area JD13 located on the substrate 10 is used to form the third overlapping area JD3. The orthographic projection area of ​​the third overlapping spraying area JD13 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the third spraying area PT3 on the plane of the substrate 10, and the orthographic projection area of ​​the third overlapping spraying area JD13 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the fourth spraying area PT4 on the plane of the substrate 10. In this embodiment of the disclosure, by defining the area relationship between the overlapping sprayed area and the two adjacent sprayed areas, other hues can be avoided, thus ensuring the quality of the product's appearance.

[0079] In some exemplary embodiments, the material of the fourth coating zone PT4 may include 75% resin, 10% additives, and 15% fourth color paste.

[0080] In some exemplary embodiments, the fourth spraying area PT4 is located on one side of the line connecting the center point of the nozzle of the seventh spray gun 57 and the center point of the nozzle of the eighth spray gun 58.

[0081] In some exemplary embodiments, there is a distance H4 between the seventh spray gun 57 and the eighth spray gun 58 along the third direction Z, and the eighth spray gun 58 has a spraying distance W4 between the first substrate 10-1 and the second substrate 10-2. At least one of H4 and W4 can be changed to change the position of the fourth spraying area PT4.

[0082] (08) Forming the fifth spraying area PT5. Forming the fifth spraying area PT5 may include: using a power device to move the hanger to the position of the fifth spray gun assembly 60, and using the fifth spray gun assembly 60 to spray the first substrate 10-1 to form the fifth spraying area PT5, such as... Figure 8 As shown, the hanger is then rotated 180 degrees using a power device, and the fifth spray gun assembly 60 is used to spray the side of the second substrate 10-2 away from the first substrate 10-1 to form the fifth spray area PT5.

[0083] The fifth spray gun assembly 60 may include a ninth spray gun 69 and a tenth spray gun 610, which may have identical structures. A distance H5 exists between the ninth spray gun 69 and the tenth spray gun 610 along a third direction Z, the distance H5 ranging from 10 cm to 17 cm, for example, 12 cm. For example, the ninth spray gun 69 is further from the ground than the tenth spray gun 610. The tenth spray gun 610 has a spraying distance W5 with respect to the first substrate 10-1 and the second substrate 10-2, the spraying distance W5 ranging from 41 cm to 44 cm, for example, 42.5 cm.

[0084] In some exemplary embodiments, the fifth spraying area PT5 includes the fifth color partition 13-5, and the orthographic projection area of ​​the fifth spraying area PT5 on the plane where the substrate 10 is located is larger than the orthographic projection area of ​​the fifth color partition 13-5 on the plane where the substrate 10 is located, so as to ensure the area of ​​the fifth color partition and the fourth overlapping area on the shell appearance, and to avoid quality defects such as missed spraying. In the embodiments of this disclosure, the fifth spraying area is the spraying area formed by the fifth spray gun assembly in one spraying.

[0085] In some exemplary embodiments, a fourth overlapping spraying area JD14 exists between the fourth spraying area PT4 and the fifth spraying area PT5. The fourth overlapping spraying area JD14 includes the fourth overlapping area JD4, which is the area located between the first boundary line L1 and the second boundary line L2 of the fourth overlapping area JD4 and covered by at least one of the fourth spraying area PT4 and the fifth spraying area PT5. The area of ​​the fourth overlapping spraying area JD14 located on the substrate 10 serves as the fourth overlapping area JD4. The orthographic projection area of ​​the fourth overlapping spraying area JD14 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the fourth spraying area PT4 on the plane of the substrate 10, and the orthographic projection area of ​​the fourth overlapping spraying area JD14 on the plane of the substrate 10 is less than or equal to 50% of the orthographic projection area of ​​the fifth spraying area PT5 on the plane of the substrate 10. In this embodiment of the disclosure, by defining the area relationship between the overlapping sprayed area and the two adjacent sprayed areas, other hues can be avoided, thus ensuring the quality of the product's appearance.

[0086] In some exemplary embodiments, the material of the fifth coating zone PT5 may include 75% resin, 10% additives, and 15% fifth color paste.

[0087] In some exemplary embodiments, the fifth spraying area PT5 is located on one side of the line connecting the center point of the nozzle of the ninth spray gun 69 and the center point of the nozzle of the tenth spray gun 610.

[0088] In some exemplary embodiments, there is a distance H5 between the ninth spray gun 69 and the tenth spray gun 610 along the third direction Z, and the tenth spray gun 610 has a spraying distance W5 between the first substrate 10-1 and the second substrate 10-2. At least one of H5 and W5 can be changed to change the position of the fifth spraying area PT5.

[0089] The above description of the movement of the hanger is merely illustrative, and this disclosure does not limit the rotation and movement of the hanger.

[0090] In some possible exemplary embodiments, the spray gun assemblies spraying different colors spray pigments at different angles, and the spray angle of the spray gun assembly can be adjusted to adjust the position of the formed spray area.

[0091] (09) Forming a pearlescent layer. Forming the pearlescent layer 14 may include: placing the substrate 10 on which the color layer 13 is formed on a second operating table, the plane of which the second operating table is located is parallel to the plane formed by the first direction X and the second direction Y. The second operating table is electrically connected to a power device, and the second operating table can rotate 360° along an axis parallel to the third direction Z under the drive of the power device, and move along a direction parallel to the plane formed by the first direction X and the second direction Y. The second operating table can move along the first direction X, or the second operating table can move along the second direction Y. During the process of the second operating table rotating and moving the substrate 10 360°, the substrate 10 on which the color layer 13 is formed is sprayed with a spray gun to form a pearlescent layer 14 located on the side of the color layer 13 away from the substrate 10. The spraying time is about 10 seconds. An enlarged schematic diagram of the material forming the pearlescent layer 14 is shown below. Figure 9 As shown, the material forming the pearlescent layer 14 may include a polyhedral powder material. For example, the polyhedron may be a pentahedron. Polyhedra can refract more light from multiple angles, allowing the shell to display a variety of colors, such as... Figure 9 As shown, the two line segments represent the human eye's perspective. Different colors can be seen from different perspectives, resulting in a multi-colored gradient effect across the entire product. In this embodiment, the pearlescent layer serves two main purposes: firstly, it reduces the abruptness of color transitions, allowing adjacent colors to blend naturally; secondly, it enhances the display effect by adding variations in light and shadow, creating a multi-colored effect.

[0092] In some exemplary embodiments, the material of the pearlescent layer 14 may include transparent resin and metal oxide particles, the particle size of which may be from 0.5 micrometers to 0.8 micrometers, and the particle content may be from 8% to 10%. For example, the metal oxide may include titanium dioxide and iron oxide. For example, the metal oxide particles may be polyhedral.

[0093] In some exemplary embodiments, the thickness of the pearlescent layer can range from 12 micrometers to 16 micrometers.

[0094] (10) Forming a protective layer. Forming the protective layer 15 may include: spraying a UV paint onto the substrate 10 on which the pearlescent layer 14 is formed, and curing it with ultraviolet light for 20 seconds to form the protective layer 15. An enlarged schematic diagram of the material of the protective layer 15 is shown below. Figure 10 As shown, for example, the material of the protective layer 15 can be spherical to prevent dirt adhesion. In this embodiment of the present disclosure, the protective layer can improve the wear resistance and stain resistance of the casing. During the use of the product, the protective layer is in direct contact with the user. Talc and fluorine-modified polymers containing active siloxane genes can be added to the material of the protective layer. Talc can increase the smooth feel, and fluorine-modified polymers containing active siloxane genes can change the surface tension to obtain a hydrophobic effect, making it difficult for dirt and fingerprints to adhere to the surface, thus improving the stain resistance of the casing.

[0095] In some exemplary embodiments, the thickness of the protective layer 15 can range from 18 micrometers to 25 micrometers.

[0096] This disclosure provides a method for preparing a shell, comprising: An organic layer is formed on one side of the substrate; Install the substrate onto the mounting bracket; The substrate is coated using at least two spray gun assemblies configured to sequentially coat the substrate to form a color layer, with each adjacent coat using a different color. Each spray gun assembly coats the substrate to form a coating area, and adjacent coating areas form an overlapping coating area. Each coating area includes a color partition formed on the substrate, and each overlapping coating area includes an overlapping area formed on the substrate. The color partitions and overlapping areas are arranged alternately, and the overlapping area is configured to display a mixture of the colors displayed by two adjacent color partitions. Each color partition is configured to display a single color, and any two adjacent color partitions display different colors. A pearlescent layer is formed on the side of the color layer away from the substrate.

[0097] In some exemplary embodiments, the hanger is configured to move the substrate along a moving direction, and the at least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: The at least two spray gun assemblies are arranged sequentially along the moving direction. After one of the at least two spray gun assemblies is sprayed with a color, the hanger moves the substrate, and the other of the at least two other spray gun assemblies is sprayed with a different color.

[0098] In some exemplary embodiments, mounting the substrate to the hanger includes: Two substrates are mounted to the hanger at a 90-degree angle to each other, and the hanger is configured to move and rotate the substrates. At least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: After the spray gun assembly sprays one of the two substrates, the hanger drives the substrate to rotate, and the spray gun assembly sprays the other of the two substrates. The hanger moves the substrate to the next spray gun assembly.

[0099] In some exemplary embodiments, the projected area of ​​the overlapping sprayed area on the plane of the substrate is less than or equal to 50% of the projected area of ​​any one of the two adjacent sprayed areas on the plane of the substrate.

[0100] In some exemplary embodiments, mounting the substrate to the hanger includes: tilting the substrate.

[0101] In some exemplary embodiments, before forming an organic layer on one side of the substrate, the preparation method further includes: chemically intervening in the material to form a passivation layer and the substrate.

[0102] In some exemplary embodiments, after forming the pearlescent layer, the preparation method further includes forming a protective layer on the side of the pearlescent layer away from the substrate.

[0103] This disclosure provides a spraying system applied to the shell preparation method described in any of the foregoing embodiments. The spraying system includes the hanger, the spray gun assembly, and a power unit, and the power unit is electrically connected to the hanger and the spray gun assembly.

[0104] While the embodiments disclosed in this invention have been described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. It should be noted that the above embodiments or implementation methods are merely exemplary and not restrictive. Therefore, this disclosure is not limited to the content specifically shown and described herein. Various modifications, substitutions, or omissions can be made to the form and details of the implementation without departing from the scope of this disclosure.

Claims

1. A housing, characterized in that, Includes a substrate and an organic layer, a color layer, and a pearlescent layer located on the substrate; The color layer includes two or more color zones and at least one overlapping area. The overlapping area is provided between each pair of adjacent color zones, and the color zones and the overlapping area are arranged alternately in sequence. The overlapping area is configured to display a mixture of the colors displayed by the two adjacent color zones. Each color zone is configured to display one color, and any two adjacent color zones display different colors. The organic layer is located between the substrate and the color layer, and the side of the organic layer closest to the color layer is in contact with the color layer; The pearlescent layer is located on the side of the color layer away from the substrate, and the side of the pearlescent layer closer to the substrate is in contact with the color layer.

2. The housing as claimed in claim 1, characterized in that, All of the color zones displayed are different colors.

3. The housing as described in claim 1, characterized in that, Each of the overlapping regions has two dividing lines, and the two dividing lines are neither perpendicular to nor parallel to a first direction, which is parallel to the edge of the substrate.

4. The housing as described in claim 3, characterized in that, The two dividing lines are a first dividing line and a second dividing line, and the first dividing line has a first angle with the first direction, and the second dividing line has a second angle with the first direction, and the range of the first angle and the second angle is both between 40° and 50°.

5. The housing as claimed in claim 1, characterized in that, The projected area of ​​the overlapping area on the plane of the substrate is less than or equal to the projected area of ​​either of the two color partitions adjacent to the overlapping area on the plane of the substrate.

6. The housing as claimed in claim 1, characterized in that, The thickness of the color layer ranges from 15 micrometers to 20 micrometers; and / or, the thickness of the organic layer ranges from 12 micrometers to 16 micrometers; and / or, the thickness of the pearlescent layer ranges from 12 micrometers to 16 micrometers.

7. The housing as claimed in claim 1, characterized in that, The substrate material can be metal or plastic.

8. The housing as claimed in any one of claims 1 to 7, characterized in that, In a structure where the substrate material includes a metallic material, the housing further includes at least one of a passivation layer and a protective layer; in a structure where the substrate material includes a plastic material, the housing further includes a protective layer. The passivation layer is located between the substrate and the color layer, and the side of the passivation layer closest to the substrate is in contact with the substrate; The protective layer is located further away from the substrate than the passivation layer, the organic layer, the color layer, and the pearlescent layer.

9. The housing as claimed in claim 8, characterized in that, The thickness of the passivation layer ranges from 8 micrometers to 12 micrometers; and / or, the thickness of the protective layer ranges from 18 micrometers to 25 micrometers.

10. The housing as claimed in claim 8, characterized in that, The housing satisfies at least one of the following conditions: The passivation layer includes a chromium coating layer; The organic layer is made of 80% transparent resin material; The pearlescent layer is made of polyhedral particles of metal oxide; The material of the protective layer includes talc.

11. A method for preparing a shell, characterized in that, include: An organic layer is formed on one side of the substrate; Install the substrate onto the mounting bracket; The substrate is coated using at least two spray gun assemblies configured to sequentially coat the substrate to form a color layer, with each adjacent coat using a different color. Each spray gun assembly coats the substrate to form a coating area, and adjacent coating areas form an overlapping coating area. Each coating area includes a color partition formed on the substrate, and each overlapping coating area includes an overlapping area formed on the substrate. The color partitions and the overlapping areas are arranged alternately, and the overlapping area is configured to display a mixture of the colors displayed by two adjacent color partitions. Each color partition is configured to display a single color, and any two adjacent color partitions display different colors. A pearlescent layer is formed on the side of the color layer away from the substrate.

12. The method for preparing the shell as described in claim 11, characterized in that, The hanger is configured to move the substrate along the direction of movement, and the at least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: The at least two spray gun assemblies are arranged sequentially along the moving direction. After one spray gun assembly sprays a color, the hanger moves the substrate, and the other spray gun assembly sprays another color.

13. The method for preparing the shell as described in claim 11, characterized in that, The process of mounting the substrate onto the hanger includes: Two substrates are mounted to the hanger at a 90-degree angle to each other, and the hanger is configured to move and rotate the substrates. At least two spray gun assemblies are configured to sequentially spray the substrate to form a color layer, including: After the spray gun assembly sprays one of the two substrates, the hanger drives the substrate to rotate, and the spray gun assembly sprays the other of the two substrates. The hanger moves the substrate to the next spray gun assembly.

14. The method for preparing the shell as described in claim 11, characterized in that, The projected area of ​​the overlapping sprayed area on the plane of the substrate is less than or equal to 50% of the projected area of ​​any one of the two adjacent sprayed areas on the plane of the substrate.

15. The method for preparing the shell as described in claim 11, characterized in that, The process of mounting the substrate onto the hanger includes placing the substrate at an angle.

16. The method for preparing the shell according to any one of claims 11 to 15, characterized in that, Before forming an organic layer on one side of the substrate, the preparation method further includes: chemically intervening in the material to form a passivation layer and the substrate.

17. The method for preparing the shell according to any one of claims 11 to 15, characterized in that, After forming the pearlescent layer, the preparation method further includes forming a protective layer on the side of the pearlescent layer away from the substrate.

18. A spraying system, characterized in that, The method for preparing the housing according to any one of claims 11 to 17, wherein the spraying system includes the hanger, the spray gun assembly, and a power unit, and the power unit is electrically connected to the hanger and the spray gun assembly.

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