Process for manufacturing an automotive trim part

Abstract

This invention provides a manufacturing process for automotive decorative parts, comprising the following steps: providing injection molding equipment to manufacture a light-transmitting substrate, a decorative panel, a light-transmitting base plate, and a shell; cleaning the light-transmitting substrate, decorative panel, and light-transmitting base plate using ultrasonic cleaning equipment; performing multi-layer light-blocking treatment on the lower surface of the decorative panel using light-blocking equipment, with the light-blocking range of the multi-layer light-blocking layers gradually increasing from the outer layer to the inner layer; performing a secondary cleaning of the decorative panel using ultrasonic cleaning equipment; and attaching a textured film to the upper surface of the light-blocking treated decorative panel. This invention performs light-blocking treatment on the decorative panel. Before the light-blocking treatment, the decorative panel is first cleaned using ultrasonic cleaning equipment; after cleaning, the lower surface of the decorative panel is then subjected to multi-layer light-blocking treatment using light-blocking equipment, effectively ensuring the light-blocking effect of the decorative panel on the light-emitting components, resulting in uniform brightness throughout the automotive decorative parts.

Description

Technical Field

[0001] This invention relates to the technical field of automotive trim parts, and particularly to a manufacturing process for automotive trim parts. Background Technology

[0002] More and more automotive interior components are integrating optical lighting designs. Large decorative surfaces inside the car, including door panels, sub-instrument panels and instrument panels, door panel trim strips, sunroofs, doors, door handles, etc., are illuminated. When not in use, they display surface textures, and when in use, they can display translucent patterns to meet the user's visual experience requirements.

[0003] A new automotive decorative part with multiple light-shielding layers has been designed, which can make the brightness of light emission more uniform. The automotive decorative part includes a light-transmitting substrate, a decorative panel, a light-transmitting base plate, a light-emitting component, and a shell. The lower surface of the decorative panel has multiple light-shielding layers, and the upper surface has a textured film. Its components are different from the structure of traditional automotive decorative parts, and the multi-layer light-shielding layer structure in the decorative panel is different from the traditional single-layer light-shielding layer structure. Therefore, traditional manufacturing equipment and processes cannot be used. It is necessary to provide a manufacturing process for producing automotive decorative parts with multiple light-shielding layers. Summary of the Invention

[0004] The main objective of this invention is to provide a manufacturing process for automotive decorative parts, which aims to effectively solve the manufacturing problem of automotive decorative parts with multi-layer light-shielding layer structures.

[0005] To achieve the above objectives, the technical solutions of the present invention are as follows:

[0006] This invention provides a manufacturing process for automotive decorative parts, which is used to manufacture automotive decorative parts. The manufacturing process for automotive decorative parts includes the following steps:

[0007] Step S1: Provide injection molding equipment and use the injection molding equipment to manufacture a light-transmitting substrate, decorative panel, light-transmitting base plate, and outer shell;

[0008] Step S2: Provide ultrasonic cleaning equipment and use the ultrasonic cleaning equipment to clean the translucent substrate, decorative panel and translucent base plate;

[0009] Step S3: Provide a light-shielding treatment device and use the light-shielding treatment device to perform multi-layer light-shielding treatment on the lower surface of the decorative panel. The light-shielding range of the multi-layer light-shielding layer gradually increases from the outer layer to the inner layer.

[0010] Step S4: Use ultrasonic cleaning equipment to perform a second cleaning of the decorative panel;

[0011] Step S5: Provide a film application device to apply a textured film to the upper surface of the light-shielding decorative panel;

[0012] Step S6: Assemble the light-transmitting substrate, decorative panel, light-transmitting base plate, light-emitting components, and outer shell.

[0013] Compared with the prior art, the manufacturing process of an automotive decorative part provided by the present invention involves a light-shielding treatment on the decorative panel. Before the light-shielding treatment, the decorative panel is first cleaned with an ultrasonic cleaning device to remove foreign matter such as dust, burrs, and particles from the surface of the decorative panel. This effectively avoids local bubbling, bulging, and unevenness of the light-shielding layer due to foreign matter on the surface of the decorative panel after the light-shielding treatment. After cleaning, the lower surface of the decorative panel is then subjected to multi-layer light-shielding treatment using a light-shielding treatment device. The light-shielding range of the multi-layer light-shielding layer gradually increases from the outer layer to the inner layer, effectively ensuring the light-shielding effect of the decorative panel on the light-emitting components and making the brightness uniform throughout the automotive decorative part.

[0014] In a preferred embodiment, the light-shielding treatment equipment includes a spraying device and a drying device; the light-shielding layer is a light-shielding paint layer and has four layers;

[0015] Step S3 includes the following steps in the shading process:

[0016] Step S31: Apply the first light-blocking paint layer using a spraying device and cure it; apply the first light-blocking paint layer to the lower surface of the decorative panel, and then dry and cure it using a drying device.

[0017] Step S32: Spray the second light-blocking paint layer using a spraying device and cure it; spray the second light-blocking paint layer on the lower surface of the decorative panel where the first light-blocking paint layer has been sprayed, and then use a drying device to dry and cure it after spraying.

[0018] Step S33: Spray the third light-blocking paint layer using a spraying device and cure it; spray the third light-blocking paint layer on the lower surface of the decorative panel where the second light-blocking paint layer has been sprayed, and then use a drying device to dry and cure it.

[0019] Step S34: Apply the fourth light-blocking paint layer using a spraying device and cure it; apply the fourth light-blocking paint layer to the area on the lower surface of the decorative panel where the third light-blocking paint layer has been applied, and then dry and cure it using a drying device.

[0020] In a preferred embodiment, each layer of light-shielding paint has the same thickness of 12 μm.

[0021] In a preferred embodiment, the drying device uses ultraviolet irradiation curing to cure the light-shielding layer. The curing temperature is 70-120°C, the ultraviolet irradiation power is 5-8KW, and the irradiation time is 5-7 minutes.

[0022] In a preferred embodiment, the spraying device includes a spraying mechanism, which includes a high-pressure plunger pump and a spray gun connected to the high-pressure plunger pump. The spraying is performed using a high-pressure spraying method, and an electrode is provided at the nozzle of the spray gun to generate ionized compressed air through high-pressure corona discharge.

[0023] In a preferred embodiment, the spraying device further includes a fixture mechanism having a receiving space for accommodating and fixing a decorative panel. Above the receiving space is a movable plate that can move laterally relative to the receiving space. Each movable plate has a spraying window, through which the surface of the decorative panel to be sprayed, which is fixed in the receiving space, is exposed. The size of each spraying window is adapted to the size of its corresponding light-shielding layer, and the spraying window is correspondingly arranged with the spray gun.

[0024] In a preferred embodiment, the number of spraying devices is four; the drying device has four drying conveying channels, the first ends of the four drying conveying channels are connected to the corresponding spraying devices, and the last ends of the three drying conveying channels are connected to the next spraying device.

[0025] In a preferred embodiment, the present invention provides a conveyor line for transporting decorative panels, the conveyor line carrying a plurality of fixtures for placing decorative panels, the conveyor line being sequentially connected to a plurality of spraying devices and a drying conveyor channel.

[0026] In a preferred embodiment, step S5 includes the following steps:

[0027] Step S51: Pick up the film layer to be applied and move it to the side of the decorative panel to be applied, so that the adhesive side of the film layer faces the decorative panel.

[0028] Step S52: Blow airflow onto the surface of the film layer opposite to the adhesive surface to apply force to the film layer and attach it to the surface of the decorative panel.

[0029] In a preferred embodiment, the film application device includes:

[0030] A movable picking mechanism for picking up and placing the film layer to be applied; the picking mechanism includes a vacuum adsorption picking head, and there are at least two vacuum adsorption picking heads for picking up at least the opposite ends of the film layer to be applied.

[0031] A support platform for placing decorative panels;

[0032] A blower mechanism for blowing airflow, wherein the blower mechanism and the pickup mechanism are disposed on one side of the bearing surface of the support platform; the blower mechanism includes multiple air nozzles, which are disposed on one side of the bearing surface of the support platform and arranged sequentially between at least two vacuum adsorption pickup heads.

[0033] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0035] Figure 1 This is a schematic flowchart of the manufacturing process of the automotive decorative parts of the present invention;

[0036] Figure 2 This is a schematic flowchart of step S3 in the manufacturing process of the automotive decorative parts of the present invention;

[0037] Figure 3 This is a schematic flowchart of step S5 in the manufacturing process of the automotive decorative parts of the present invention.

[0038] Figure 4 This is a structural cross-sectional view of the automotive trim part of the present invention;

[0039] Figure 5 This is a schematic diagram showing the relationship between the light-shielding layer of the decorative panel and the light-emitting component of the automotive trim part of the present invention;

[0040] Figure 6 This is a flowchart illustrating the preparation process of the decorative panel of this invention;

[0041] Figure 7 This is a schematic diagram of the spraying device of the present invention;

[0042] Figure 8 This is a schematic diagram of the film-applying device of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1—Automotive trim parts, 11—Translucent substrate, 12—Decorative panel, 121—Light-blocking paint layer, 122—Textured film, 13—Translucent base plate, 14—Outer shell, 15—Light-emitting component, 2—Spraying device, 21—Spraying mechanism, 211—Spray gun, 22—Jig mechanism, 221—Moving plate, 2211—Spraying window, 3—Drying device, 31—Drying conveying channel, 4—Conveyor line, 5—Film application device, 51—Pick-up mechanism, 52—Carrier platform, 53—Blowering mechanism, 6—Ultrasonic cleaning equipment. Detailed Implementation

[0045] To better illustrate the present invention, the invention will now be described in further detail with reference to the accompanying drawings.

[0046] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0047] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0048] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In the description of this invention, it should be understood that the terms "vertical", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0050] like Figure 3 and Figure 4As shown, the present invention provides an automotive decorative component 1, comprising a light-transmitting substrate 11 having a light-transmitting viewing portion and a receiving cavity, the light-transmitting viewing portion being located above the receiving cavity; a decorative panel 12 disposed within the receiving cavity and directly opposite the light-transmitting viewing portion; a light-transmitting base plate 13 installed below the decorative panel 12, enclosing the lower side of the receiving cavity; a light-emitting component 15 installed below the light-transmitting base plate 13, the light emitted by the light-emitting component 15 being diffused outward through the light-transmitting base plate 13 and the light-transmitting substrate 11; and a housing 14 having an open top, the light-transmitting substrate 11, the decorative panel 12, the light-transmitting base plate 13, and the light-emitting component 15 all being installed within the housing 14. The automotive trim 1 consists of a light-transmitting substrate 11, a decorative panel 12, a light-transmitting base plate 13, and a light-emitting component 15, arranged sequentially from top to bottom. Multiple light-shielding layers with gradually increasing light-shielding range from the outside to the inside are sprayed onto the lower surface of the light-transmitting base plate 13. These multiple light-shielding layers are located in the center of the light-emitting component 15. The multiple light-shielding layers simultaneously block the light emitted by the light-emitting component 15. The closer the light-shielding layers are to the center, the higher the degree of overlap, resulting in better light blocking. This corresponds to the density of the light emitted by the light-emitting component 15, ensuring that the luminance of the light-transmitting viewing area of ​​the automotive trim 1 is consistent, the brightness is uniform, and the light is soft and not dazzling, effectively enhancing the aesthetics of the automotive trim 1.

[0051] In the automotive trim 1, a textured film 122 is adhered to the upper surface of the trim panel 12, and the textured film 122 has a textured pattern. The light-transmitting viewing section has a three-dimensional textured structure with multiple intersecting rhomboid diamond facets, and the three-dimensional textured structure is processed on the upper surface of the receiving cavity. Due to the refraction of light by the intersecting rhomboid diamond three-dimensional structure, when the light-emitting component 15 is not emitting light, external light is reflected by the rhomboid three-dimensional structure, and the trim panel 12 displays the textured structure of the light-transmitting viewing section and the background color of the textured film 122, and the textured pattern of the textured film 122 cannot be seen. When the light-emitting component 15 emits light, light is emitted from inside the automotive trim 1, and the textured pattern of the textured film 122 passes through the light-transmitting viewing section after light refraction. The trim panel 12 displays both the textured pattern of the textured film 122 and the textured structure of the light-transmitting viewing section. Compared with existing automotive illuminated interior trim parts that display a single textured pattern when emitting light, this invention can not only display the textured structure of the light-transmitting viewing section, but also the textured pattern of the textured film 122, resulting in a better visual effect.

[0052] Specifically, combined Figures 1 to 8 As shown, the present invention provides a manufacturing process for an automotive trim part 1, which is used to manufacture the automotive trim part 1. The manufacturing process of the automotive trim part 1 includes the following steps:

[0053] Step S1: Provide injection molding equipment and use the injection molding equipment to manufacture the light-transmitting substrate 11, decorative panel 12, light-transmitting base plate 13 and outer shell 14;

[0054] Step S2: Provide ultrasonic cleaning equipment 6, and use ultrasonic cleaning equipment 6 to clean the light-transmitting substrate 11, decorative panel 12 and light-transmitting base plate 13.

[0055] Step S3: Provide a light-shielding treatment device and use the light-shielding treatment device to perform multi-layer light-shielding treatment on the lower surface of the decorative panel 12. The light-shielding range of the multi-layer light-shielding layer gradually increases from the outer layer to the inner layer.

[0056] Step S4: Use ultrasonic cleaning equipment 6 to perform a second cleaning on decorative panel 12;

[0057] Step S5: Provide a film application device 5 to apply a textured film 122 to the upper surface of the light-shielding decorative panel 12;

[0058] Step S6: Assemble the light-transmitting substrate 11, decorative panel 12, light-transmitting base plate 13, light-emitting component 15, and outer shell 14.

[0059] Compared with the prior art, the manufacturing process of the automotive decorative part 1 provided by the present invention involves performing a light-shielding treatment on the decorative panel 12. Before the light-shielding treatment, the decorative panel 12 is first cleaned with an ultrasonic cleaning device 6 to remove foreign objects such as dust, burrs, and particles from the surface of the decorative panel 12. This effectively avoids the occurrence of local bubbling, bulging, and unevenness of the light-shielding layer due to foreign objects on the surface of the decorative panel 12 after the light-shielding treatment. After cleaning, the lower surface of the decorative panel 12 is then subjected to multi-layer light-shielding treatment using a light-shielding treatment device. The light-shielding range of the multi-layer light-shielding layer gradually increases from the outer layer to the inner layer, effectively ensuring the light-shielding effect of the decorative panel 12 on the light-emitting component 15, and making the brightness of the automotive decorative part 1 uniform throughout.

[0060] Furthermore, the light-shielding treatment equipment includes a spraying device 2 and a drying device 3; the light-shielding layer is a light-shielding paint layer 121 and has four layers;

[0061] In step S3, four coats of the light-shielding layer are required. To accelerate the drying speed of the light-shielding paint layer 121, a drying and curing process is performed after each coat of light-shielding paint layer 121 is applied. The light-shielding process includes the following steps:

[0062] Step S31: Spray the first light-shielding paint layer 121 using the spraying device 2 and cure it; spray the first light-shielding paint layer 121 on the lower surface of the decorative panel 12, and then dry and cure it using the drying device 3.

[0063] Step S32: Spray the second light-shielding paint layer 121 using the spraying device 2 and cure it; spray the second light-shielding paint layer 121 on the lower surface of the decorative panel 12 where the first light-shielding paint layer 121 has been sprayed, and then dry and cure it using the drying device 3.

[0064] Step S33: Spray the third light-blocking paint layer 121 using the spraying device 2 and cure it; spray the third light-blocking paint layer 121 on the lower surface of the decorative panel 12 where the second light-blocking paint layer 121 has been sprayed, and then dry and cure it using the drying device 3.

[0065] Step S34: Spray the fourth light-blocking paint layer 121 using the spraying device 2 and cure it; spray the fourth light-blocking paint layer 121 on the lower surface of the decorative panel 12 where the third light-blocking paint layer 121 has been sprayed, and then dry and cure it using the drying device 3.

[0066] Furthermore, each layer of the light-shielding varnish 121 has the same thickness of 12μm to ensure the light-shielding effect, thereby resulting in consistent luminance and uniform brightness.

[0067] Furthermore, each of the light-shielding layers is arranged symmetrically with respect to the light-emitting component 15, which improves the brightness consistency of the light-transmitting viewing area and further unifies the brightness.

[0068] Furthermore, each light-shielding layer uses black light-shielding paint. Black has a good light absorption effect, thus providing a good light-shielding effect, effectively reducing the number of light-shielding layers and simplifying the process steps.

[0069] Furthermore, the drying device 3 uses ultraviolet irradiation curing to cure the light-shielding layer. The curing temperature is 80-110℃, the ultraviolet irradiation power is 6KW, and the irradiation time is 5 minutes, so as to quickly dry the light-shielding paint layer 121 formed by spraying.

[0070] Furthermore, the spraying device 2 includes a spraying mechanism 21, which includes a high-pressure plunger pump and a spray gun 211 connected to the high-pressure plunger pump. The spraying is performed using a high-pressure spraying method. An electrode is set at the nozzle of the spray gun 211 to generate ionized compressed air through high-pressure corona discharge, so as to eliminate static electricity accumulated on the decorative panel 12 and remove dust.

[0071] Furthermore, the spraying device 2 also includes a fixture mechanism 22, which has a receiving space for accommodating and fixing the decorative panel 12. Above the receiving space is a movable plate 221 that can move laterally relative to the receiving space. Each movable plate 221 has a spraying window 2211, through which the surface of the decorative panel 12 fixed in the receiving space to be sprayed is exposed. The size of each spraying window 2211 is adapted to the size of its corresponding light-shielding layer, and the spraying window 2211 is correspondingly arranged with the spray gun 211.

[0072] Furthermore, the present invention employs one drying device 3 and four spraying devices 2 in cooperation to spray and dry the decorative panel 12, thereby saving equipment costs. The drying device 3 has four drying conveying channels 31, the first ends of which are connected to the corresponding spraying device 2, and the last ends of three of the drying conveying channels 31 are connected to the next spraying device 21.

[0073] Furthermore, the present invention provides a conveyor line 4 for transporting decorative panels 12, wherein a plurality of fixtures for placing decorative panels 12 are transported on the conveyor line 4, and the conveyor line 4 is sequentially connected to a plurality of spraying devices 2 and a drying conveying channel 31 to complete the automated light-shielding treatment of the decorative panels 12.

[0074] Furthermore, step S5 includes the following steps:

[0075] Step S51: Pick up the film layer to be applied and move the film layer to the side of the film surface of the decorative panel 12 so that the adhesive side of the film layer faces the film surface of the decorative panel 12.

[0076] Step S52: Blow airflow onto the surface of the film layer opposite to the adhesive surface to apply force to the film layer and attach the film layer to the surface of the decorative panel 12.

[0077] This air-blowing-assisted film application method is applicable to a wider range of decorative panels 12, and is not limited by the shape of the surface to be filmed on the decorative panel 12. It is particularly suitable for applying film to curved surfaces, as it is not limited by the curvature of the surface and reduces the risk of damage and contamination to the decorative panel 12. During application, airflow is blown onto the surface of the decorative panel 12 opposite to the adhesive surface, moving gradually from the center of the film layer towards its edge. This allows the film layer to gradually adhere to the surface of the decorative panel 12 from its center to its edge.

[0078] Furthermore, the film application device 5 includes:

[0079] A movable picking mechanism 51 for picking up and placing the film layer to be applied; the picking mechanism 51 includes a vacuum adsorption picking head, and there are at least two vacuum adsorption picking heads for picking up at least the opposite ends of the film layer to be applied.

[0080] Support platform 52 for placing decorative panel 12;

[0081] A blower mechanism 53 for blowing airflow is provided, and the blower mechanism 53 and the pickup mechanism 51 are disposed on one side of the bearing surface of the support platform 52. The blowing structure includes multiple air nozzles, which are disposed on one side of the bearing surface of the support platform 52 and arranged sequentially between at least two vacuum adsorption pickup heads.

[0082] When blowing air to apply the film, air nozzles are set above the film layer corresponding to each area of ​​the film layer. The air nozzles above the middle area of ​​the film layer can be turned on first, and then the air nozzles are turned on in sequence from the middle area to the edge area.

[0083] This invention is not limited to the above-described embodiments. If any modifications or variations to this invention do not depart from the spirit and scope of this invention, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this invention, then this invention also intends to include such modifications and variations.

Claims

1. A manufacturing process for automotive decorative parts, characterized in that, The automotive trim includes a translucent substrate having a translucent viewing section and a receiving cavity. The translucent viewing section is located above the receiving cavity and has a three-dimensional texture structure with multiple intersecting diamond-shaped facets. The three-dimensional texture structure is processed on the upper surface of the receiving cavity. A decorative panel is disposed within the receiving cavity and directly opposite the translucent viewing section. A textured film with a textured pattern is adhered to the upper surface of the decorative panel. A light-transmitting base plate is installed below the decorative panel to close the lower side of the receiving cavity. Multiple light-shielding layers with gradually increasing light-shielding range from the outside to the inside are sprayed on the lower surface of the light-transmitting base plate. A light-emitting component is installed below the light-transmitting base plate, and the light emitted by the light-emitting component is diffused outward through the light-transmitting base plate and the light-transmitting substrate; The outer casing has an open top, and the light-transmitting substrate, the decorative panel, the light-transmitting base plate, and the light-emitting component are all installed inside the outer casing; Includes the following steps: Step S1: Provide injection molding equipment and use the injection molding equipment to manufacture a light-transmitting substrate, decorative panel, light-transmitting base plate, and outer shell; Step S2: Provide ultrasonic cleaning equipment and use the ultrasonic cleaning equipment to clean the translucent substrate, decorative panel and translucent base plate; Step S3: Provide a light-shielding treatment device and use the light-shielding treatment device to perform multi-layer light-shielding treatment on the lower surface of the decorative panel. The light-shielding range of the multi-layer light-shielding layer gradually increases from the outer layer to the inner layer. Step S4: Use ultrasonic cleaning equipment to perform a second cleaning of the decorative panel; Step S5: Provide a film application device to apply a textured film to the upper surface of the light-shielding decorative panel; Step S6: Assemble the light-transmitting substrate, decorative panel, light-transmitting base plate, light-emitting component, and outer shell; The light-shielding treatment equipment includes a spraying device and a drying device; The light-shielding layer is a light-shielding paint layer and has four layers; Step S3 includes the following steps in the shading process: Step S31: Apply the first light-blocking paint layer using a spraying device and cure it; apply the first light-blocking paint layer to the lower surface of the decorative panel, and then dry and cure it using a drying device. Step S32: Spray the second light-blocking paint layer using a spraying device and cure it; spray the second light-blocking paint layer on the lower surface of the decorative panel where the first light-blocking paint layer has been sprayed, and then use a drying device to dry and cure it after spraying. Step S33: Spray the third light-blocking paint layer using a spraying device and cure it; spray the third light-blocking paint layer on the lower surface of the decorative panel where the second light-blocking paint layer has been sprayed, and then use a drying device to dry and cure it. Step S34: Spray the fourth light-blocking paint layer using a spraying device and cure it; spray the fourth light-blocking paint layer on the lower surface of the decorative panel where the third light-blocking paint layer has been sprayed, and then use a drying device to dry and cure it. The spraying device includes a spraying mechanism, which includes a high-pressure plunger pump and a spray gun connected to the high-pressure plunger pump. The spraying is performed using a high-pressure spraying method. An electrode is set at the nozzle of the spray gun to generate ionized compressed air through high-pressure corona discharge. The spraying device further includes a fixture mechanism, which has a receiving space for accommodating and fixing the decorative panel. Above the receiving space is a movable plate that can move laterally relative to the receiving space. Each movable plate has a spraying window, through which the surface of the decorative panel to be sprayed, which is fixed in the receiving space, is exposed. The size of each spraying window is adapted to the size of its corresponding light-shielding layer, and the spraying window is correspondingly set with the spray gun.

2. The manufacturing process of the automotive decorative parts according to claim 1, characterized in that: Each layer of the light-shielding coating has the same thickness, which is 12μm.

3. The manufacturing process of the automotive decorative parts according to claim 1, characterized in that: The drying device uses ultraviolet irradiation curing to cure the light-shielding layer. The curing temperature is 70-120℃, the ultraviolet irradiation power is 5-8KW, and the irradiation time is 5-7 minutes.

4. The manufacturing process of the automotive decorative part according to claim 1, characterized in that: The number of spraying devices is four; The drying device has four drying conveying channels. The first ends of the four drying conveying channels are connected to the corresponding spraying devices, and the last ends of the three drying conveying channels are connected to the next spraying mechanism.

5. The manufacturing process of the automotive decorative part according to claim 4, characterized in that: A conveyor line for transporting decorative panels is provided, wherein multiple fixtures for placing decorative panels are transported on the conveyor line, and the conveyor line is sequentially connected to multiple spraying devices and a drying conveyor channel.

6. The manufacturing process of the automotive decorative part according to claim 1, characterized in that: Step S5 includes the following steps: Step S51: Pick up the film layer to be applied and move it to the side of the decorative panel to be applied, so that the adhesive side of the film layer faces the decorative panel. Step S52: Blow airflow onto the surface of the film layer opposite to the adhesive surface to apply force to the film layer and attach it to the surface of the decorative panel.

7. The manufacturing process of the automotive decorative part according to claim 6, characterized in that: The film application device includes: A movable picking mechanism for picking up and placing the film layer to be applied; the picking mechanism includes a vacuum adsorption picking head, and there are at least two vacuum adsorption picking heads for picking up at least the opposite ends of the film layer to be applied. A support platform for placing decorative panels; A blower mechanism for blowing airflow, wherein the blower mechanism and the pickup mechanism are disposed on one side of the bearing surface of the support platform; the blower mechanism includes multiple air nozzles, which are disposed on one side of the bearing surface of the support platform and arranged sequentially between at least two vacuum adsorption pickup heads.

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