Method for realizing display and hiding of decorative lamp by using vacuum coating

Abstract

The invention discloses a method for achieving display and hiding of a decorative lamp through vacuum coating. The method comprises the following steps that S1, surface treatment and drying treatment are conducted on a transparent PC base material; s2, forming a bottom coating on the surface of the base material treated in the step S1; s3, performing vacuum coating on the surface of the base material treated in the S2 to form a compact shading layer; s4, performing laser etching on the lamplight area of the base material treated in the S3 to remove the shading layer; s5, performing vacuum coating on the surface of the base material treated in the step S4 to form a vacuum coating unified color development layer; and S6, forming a surface coating protection layer on the vacuum coating layer formed in the step S5. According to the method for realizing the display and hiding of the decorative lamp by utilizing the vacuum coating, the problems that the traditional display and hiding decorative lamp cannot be applied to products with high environmental protection requirements due to the use of PU (Poly Urethane) paint, different-color boundaries appear between a light area and a covering area of hidden display equipment, and the light transmission effect of the light area is poor are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of physical vapor deposition, and in particular relates to a method for realizing the display and concealment of decorative lamps by utilizing vacuum coating. Background Art

[0002] In recent years, the home appliance and automobile industries have been developing in an all-round way towards intelligence, comfort and aesthetics based on the continuous innovation of core technologies. Smart display screens and ambient lights have become necessary elements of this development direction. The manufacturing process of the luminous area of ​​traditional smart display screens and ambient lights will be different from the main body, affecting the overall aesthetic decorative effect. Therefore, all fields are exploring the process that can achieve the visible and hidden decorative effect, that is, when the background light source is turned off, the luminous area hides the luminous device behind it, keeps it consistent with the surrounding effect, eliminates color difference, and when the background light source is turned on, the light penetrates the covering layer and transmits the lighting effect to achieve the screen display or ambient light effect.

[0003] At present, there are many process methods that can achieve the above effect. The most commonly used method is to use PU black paint sprayed on the transparent substrate, then laser engraving to remove the PU black paint in the luminous area, and then perform conventional PVD coating process, that is, UV primer spraying, PVD aluminum plating, UV mid-coat coloring, and UV topcoat spraying. Since this process uses PU paint that is not environmentally friendly, the products manufactured by this process are not accepted in many products with strict environmental requirements. Therefore, it is necessary to develop a green and environmentally friendly alternative process that can achieve this function. Summary of the invention

[0004] The purpose of the present invention is to provide a method for realizing the display and concealment of decorative lamps by using vacuum coating, so as to solve the problem that traditional display and concealment decorative lamps cannot be applied to products with high environmental protection requirements and hidden display devices due to the use of PU coating, and the light area and the covering area have different color boundaries and the light area has poor light transmission effect.

[0005] The technical solution adopted by the present invention is a method for realizing the display and concealment of decorative lamps by using vacuum coating, comprising the following steps: S1. Pretreatment: Clean and dry the surface of the transparent PC substrate; S2, UV primer spraying: forming a primer coating on the functional surface of the substrate treated in S1; S3, vacuum coating light shielding layer primer: vacuum coating the functional surface of the substrate treated in S2 to form a dense light shielding layer; S4, laser engraving of light area: laser engraving is performed on the light area of ​​the substrate treated in S3 to remove the light shielding layer; S5, vacuum coating color adjustment: vacuum coating is performed on the functional surface of the substrate treated in S4 to form a uniform color development layer of vacuum coating; S6. UV top coating spraying: forming a top coating protective layer on the vacuum coating layer formed in S5.

[0006] The present invention is also characterized in that: The specific process of S1 is: S1.1. Use IPA clean cloth to wipe the PC material substrate twice in the dust removal cabinet to fully remove dust; S1.2. Place the substrate treated in S1.1 into an oven and bake it at 80°C for 20 minutes. S1.3. Hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid. Use an electrostatic dust removal gun to remove dust from the substrate, secondary fixture and transport skid.

[0007] In S2, a spraying robot is used in the UV primer spraying process. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 3kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10 cm ~ 20 cm, the spray room temperature is 20℃ ~ 25℃, and the spray room humidity is 45%RH ~ 55%RH.

[0008] The dynamic viscosity of the UV primer sprayed in S2 is 25 mPa·S -30 mPa·S, that is, the test temperature is 25℃, NK-2# viscosity cup is 8 seconds -11 seconds; the coating spray film thickness is controlled at 18μm ~24μm, the coating baking temperature is 45℃ ~55℃, the coating baking time is 5min ~8min, and the curing energy is UVB: 900 mj / cm 2 ~1100mj / cm 2 .

[0009] In S3, the working target is a chromium target, the power range of the target is 13Kw ~17Kw, the running speed is 0.6m / min~1m / min; the thickness of the magnetron sputtering metal film is controlled at 0.16um-0.23um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon setting value is 150Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH.

[0010] In S4, the laser engraving in the lighting area adopts a fiber laser, with a filling spacing of 0.1-0.15, a laser energy of 5%-20%, a laser engraving speed of 1000mm / s -1500mm / s, a frequency of 20kHZ, and a laser engraving depth greater than the thickness of the magnetron sputtering metal film layer and less than the sum of the metal film thickness and the primer thickness. The depth is controlled at 0.3um-1um.

[0011] In S5, when vacuum coating is adjusted, the target material is one or more combinations of aluminum, titanium, aluminum alloy, etc. The power range of the target material is 2Kw ~10Kw, the running speed is 2m / min~3m / min, the thickness of the magnetron sputtering metal film is controlled at 0.05um-0.12um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon setting value is 150Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH.

[0012] In S6, a spraying robot is used in the UV topcoat spraying process. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 3kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10cm~20cm, the spray room temperature is 20℃~25℃, and the spray room humidity is 45%RH~55%RH.

[0013] In S6, the dynamic viscosity of the UV topcoat sprayed paint is 25 mPa·S -28mPa·S, that is, the test temperature is 25℃, NK-2# viscosity cup is 8 seconds -10 seconds; the coating spray film thickness is controlled at 18μm~25μm, the coating baking temperature is 50℃~60℃, the coating baking time is 5min~8min, and the curing energy is UVB: 1000 mj / cm 2 ~1200mj / cm 2 .

[0014] The beneficial effects of the present invention are: The method for realizing the display and concealment of decorative lights by utilizing vacuum coating provided by the present invention utilizes a metal coating process with good covering effect to replace the traditional PU black paint for shading, thereby solving the problem that the use of PU paint is restricted in products with strict environmental protection requirements; the magnetron sputtering metal film layer has a high reflectivity due to its ultra-uniformity and flatness, and has a high transmittance due to its ultra-thin film layer, and utilizes the dual physical properties of high reflectivity and high transmittance of the magnetron sputtering metal film layer to solve the problems of different-color boundaries between the lighting area and the covering area and poor light transmittance of the lighting area; by solving these two problems, the process of displaying and concealing decorative lights is applied to more high-end and environmentally friendly occasions, bringing a high-level effect of the overall appearance of metallic color to smart display screens and atmosphere lights to achieve the hiding of the luminous area without losing the light transmittance of the luminous area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a flow chart of a method for realizing the display and concealment of decorative lamps by utilizing vacuum coating. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] The present invention uses vacuum coating to realize the method of hiding and showing decorative lamps. Figure 1 As shown, the following steps are included: S1. Pretreatment: Clean and dry the surface of the transparent PC substrate; The specific process is: S1.1. Use IPA clean cloth to wipe the PC material substrate twice in the dust removal cabinet to fully remove dust; S1.2. Place the substrate treated in S1.1 into an oven and bake it at 80°C for 20 minutes. S1.3. Hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid. Use an electrostatic dust removal gun to remove dust from the substrate, secondary fixture, and transport skid. S2, UV primer spraying: forming a primer coating on the functional surface of the substrate treated in S1; In S2, a spraying robot is used in the UV primer spraying process. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 3kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10 cm ~ 20 cm, the spray room temperature is 20℃ ~ 25℃, and the spray room humidity is 45%RH ~ 55%RH; The dynamic viscosity of the UV primer sprayed in S2 is 25 mPa·S -30 mPa·S, that is, the test temperature is 25℃, NK-2# viscosity cup is 8 seconds -11 seconds; the coating spray film thickness is controlled at 18μm ~24μm, the coating baking temperature is 45℃ ~55℃, the coating baking time is 5min ~8min, and the curing energy is UVB: 900 mj / cm 2 ~1100mj / cm 2 ; S3, vacuum coating light shielding layer primer: vacuum coating the functional surface of the substrate treated in S2 to form a dense light shielding layer; In S3, the working target is a chromium target, the power range of the target is 13Kw ~17Kw, the running speed is 0.6m / min~1m / min; the thickness of the magnetron sputtering metal film is controlled at 0.16um-0.23um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon gas setting value is 150 Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH; S4, laser engraving of light area: laser engraving is performed on the light area of ​​the substrate treated in S3 to remove the light shielding layer; In S4, the laser engraving in the light area adopts a fiber laser, with a filling spacing of 0.1-0.15, a laser energy of 5%-20%, a laser engraving speed of 1000mm / s -1500mm / s, a frequency of 20kHZ, and a laser engraving depth greater than the thickness of the magnetron sputtering metal film layer and less than the sum of the thickness of the metal film layer and the thickness of the primer, and the depth is controlled at 0.3um-1um; S5, vacuum coating color adjustment: vacuum coating is performed on the functional surface of the substrate treated in S4 to form a uniform color development layer of vacuum coating; In S5, when vacuum coating is adjusted, the target material is one or more combinations of aluminum, titanium, aluminum alloy, etc. The power range of the target material is 2Kw ~10Kw, the running speed is 2m / min~3m / min, the thickness of the magnetron sputtering metal film is controlled at 0.05um-0.12um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon gas setting value is 150 Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH; S6, UV top coating spraying: forming a top coating protective layer on the vacuum coating layer formed in S5; In S6, a spraying robot is used in the UV topcoat spraying process. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 3kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10cm~20cm, the spray room temperature is 20℃~25℃, and the spray room humidity is 45%RH~55%RH; In S6, the dynamic viscosity of the UV topcoat sprayed paint is 25 mPa·S -28mPa·S, that is, the test temperature is 25℃, NK-2# viscosity cup is 8 seconds -10 seconds; the coating spray film thickness is controlled at 18μm~25μm, the coating baking temperature is 50℃~60℃, the coating baking time is 5min~8min, and the curing energy is UVB: 1000 mj / cm 2 ~1200mj / cm 2 .

[0018] Example 1 The method for realizing the display and concealment of decorative lights by using vacuum coating proposed in this embodiment is to prepare a high-gloss silver logo makeup mirror, including the following steps: Step 1: Pre-treat the functional surface of the logo makeup mirror substrate. Step 1.1: Wipe the substrate twice with an IPA clean cloth in the dust removal cabinet to fully remove dust; Step 1.2, placing the substrate treated in step 1.1 into an oven for baking, setting the oven temperature to 80°C and the baking time to 20 minutes; Step 1.3, hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid, and use an electrostatic dust removal gun to remove dust from the substrate, the secondary fixture, and the transport skid; Step 2: Apply UV primer to the substrate treated in step 1 by using a spraying robot. Two spray guns are installed at the end of the robot's arm. The air pressure of each spray gun is 4kgf / cm 2 The distance between the spray gun and the substrate surface is 17 cm, the spray room temperature is 23 ° C, and the spray room humidity is 49% RH; the coating viscosity is 10.8 seconds, the dry film thickness is controlled at 20 μm, the coating baking temperature is 53 ° C, the coating baking time is 8 minutes, and the curing energy is UVB: 950 mj / cm 2 ; Step 3: vacuum coating the substrate treated in step 2 to form a light shielding layer. The working target is a chromium target, the power of the target is 13Kw, the running speed is 0.6m / min, the thickness of the magnetron sputtering metal film is 0.2±0.02um, and the vacuum degree in the cavity is 5×10 -5 Torr, argon gas setting value is 150 Sccm; working environment temperature is 22°C, humidity is 48%RH; Step 4: Perform laser engraving on the light area of ​​the substrate processed in step 3, i.e., remove the coating shading layer of the brand logo. The laser engraving on the light area adopts a fiber laser, with a filling spacing of 0.11, a laser energy of 9%, a laser engraving speed of 1000mm / s, a frequency of 20kHZ, and a laser engraving depth of 0.5um. Step 5: Vacuum coating and coloring the substrate after step 4. The target material is aluminum target material, the power of the target material is 8Kw, the running speed is 3m / min, the thickness of the magnetron sputtering metal film is 0.07±0.02um, and the vacuum degree in the chamber is 5×10 -7 Torr, argon gas setting value is 150 Sccm; working environment temperature is 21°C, humidity is 50%RH; Step 6: Apply UV topcoat to the substrate treated in step 5 by using a spray robot. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 4.2 kgf / cm 2 The distance between the spray gun and the substrate surface is 17 cm, the spray room temperature is 23 ° C, and the spray room humidity is 49% RH; the paint uses a high-gloss topcoat, the viscosity is 9.7 seconds, the dry film thickness is controlled at 20 μm, the paint baking temperature is 58 ° C, the paint baking time is 8 minutes, and the curing energy is UVB: 1100 mj / cm 2 ; That is, the target product is made.

[0019] Example 2 The method for realizing the display and concealment of decorative lamps by using vacuum coating proposed in this embodiment is to prepare a matte forged gray silver automobile atmosphere lampshade, comprising the following steps: Step 1: Pre-process the functional surface of the car atmosphere lampshade. Step 1.1: Wipe the substrate twice with an IPA clean cloth in the dust removal cabinet to fully remove dust; Step 1.2, placing the substrate treated in step 1.1 into an oven for baking, setting the oven temperature to 80°C and the baking time to 20 minutes; Step 1.3, hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid, and use an electrostatic dust removal gun to remove dust from the substrate, the secondary fixture, and the transport skid; Step 2: Apply UV primer to the substrate treated in step 1 by using a spray robot. Two spray guns are installed at the end of the robot's arm. The air pressure of each spray gun is 4.8 kgf / cm 2 , the distance between the spray gun and the substrate surface is 12 cm, the spray room temperature is 21 ° C, the spray room humidity is 50% RH; the coating viscosity is 8.9 seconds, the dry film thickness is controlled at 18 μm, the coating baking temperature is 55 ° C, the coating baking time is 7 minutes, and the curing energy is UVB: 1050 mj / cm 2 ; Step 3: Vacuum coating the substrate after step 2 to form a light shielding layer. The working target is a chromium target, the power of the target is 15Kw, the running speed is 0.8m / min, the thickness of the magnetron sputtering metal film is 0.19±0.02um, and the vacuum degree in the chamber is 5×10 -5 Torr, argon gas setting value is 150 Sccm; working environment temperature is 20℃, humidity is 51%RH; Step 4: Perform laser engraving on the light area of ​​the substrate processed in step 3, i.e., remove the coating shading layer in the light area of ​​the ambient light. The laser engraving on the light area adopts a fiber laser, with a filling spacing of 0.14, a laser energy of 10%, a laser engraving speed of 1000mm / s, a frequency of 20kHZ, and a laser engraving depth of 0.6um. Step 5: Vacuum coating and coloring the substrate after step 4. The target material is firstly titanium target material, the power of the target material is 4Kw, and the running speed is 2.5m / min; then aluminum alloy target material is used, the power of the target material is 4Kw, and the running speed is 2.5m / min. The thickness of the magnetron sputtering metal film is 0.1±0.02um; the vacuum degree in the chamber is 5×10 -6 Torr, argon gas setting value is 150 Sccm; working environment temperature is 19°C, humidity is 54%RH; Step 6: Apply UV topcoat to the substrate treated in step 5 by using a spraying robot. Two spray guns are set at the end of the robot's arm. The air pressure of each spray gun is 5kgf / cm 2 The distance between the spray gun and the surface of the decorative lampshade substrate is 12 cm, the spray room temperature is 21°C, and the spray room humidity is 50% RH; the paint uses a matte topcoat with a matte degree of 30%, a viscosity of 8.2 seconds, a dry film thickness of 20 μm, a paint baking temperature of 60°C, a paint baking time of 6 minutes, and a curing energy of UVB: 1050 mj / cm 2 ; That is, the target product is made.

[0020] Example 3 The method for realizing the display and concealment of decorative lights by using vacuum coating proposed in this embodiment is to prepare a low-mute phantom gray washing machine display screen, comprising the following steps: Step 1: Pre-process the functional surface of the washing machine display. Step 1.1: Wipe the substrate twice with an IPA clean cloth in the dust removal cabinet to fully remove dust; Step 1.2, placing the substrate treated in step 1.1 into an oven for baking, setting the oven temperature to 80°C and the baking time to 20 minutes; Step 1.3, hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid, and use an electrostatic dust removal gun to remove dust from the substrate, the secondary fixture, and the transport skid; Step 2: Apply UV primer to the substrate treated in step 1 by using a spray robot. Two spray guns are installed at the end of the robot's arm. The air pressure of each spray gun is 3.5 kgf / cm 2 The distance between the spray gun and the substrate surface is 20 cm, the spray room temperature is 24 ° C, and the spray room humidity is 53% RH; the coating viscosity is 10.2 seconds, the dry film thickness is controlled at 22 μm, the coating baking temperature is 50 ° C, the coating baking time is 8 minutes, and the curing energy is UVB: 1000 mj / cm 2 ; Step 3: vacuum coating the substrate treated in step 2 to form a light shielding layer. The working target is a chromium target, the power of the target is 17Kw, the running speed is 1m / min, the thickness of the magnetron sputtering metal film is 0.18±0.02um, and the vacuum degree in the chamber is 5×10 -6 Torr, argon gas setting value is 150 Sccm; working environment temperature is 23°C, humidity is 52%RH; Step 4: laser engrave the light area of ​​the substrate processed in step 3, that is, remove the text and pattern coating shading layer of the light area of ​​the washing machine display screen. The light area laser engraving adopts fiber laser, with a filling spacing of 0.14, laser energy of 9%, laser engraving speed of 1200mm / s, frequency of 20kHZ, and laser engraving depth of 0.5um; Step 5: Vacuum coating and coloring the substrate after step 4. The target material is firstly aluminum alloy target material, the target power is 2Kw, and the running speed is 3m / min; then titanium target material is used, the target power is 4Kw, and the running speed is 3m / min. The thickness of the magnetron sputtering metal film is 0.08±0.02um; the vacuum degree in the chamber is 5×10 -6 Torr, argon gas setting value is 150 Sccm; working environment temperature is 23°C, humidity is 53%RH; Step 6: Apply UV topcoat to the substrate treated in step 5 by using a spray robot. Two spray guns are installed at the end of the robot's arm. The air pressure of each spray gun is 3.9 kgf / cm 2 The distance between the spray gun and the surface of the decorative lampshade substrate is 20 cm, the spray room temperature is 24 ° C, and the spray room humidity is 53% RH; the paint uses a matte topcoat with a matte degree of 10%, a viscosity of 9 seconds, a dry film thickness of 24 μm, a paint baking temperature of 58 ° C, a paint baking time of 7 minutes, and a curing energy of UVB: 1100 mj / cm 2 ; That is, the target product is made.

[0021] The products of Examples 1, 2 and 3 were respectively tested for light-shielding properties in dark areas and light transmittance in light areas, and the adhesion of their interfaces was tested.

[0022] The test of light transmittance is carried out in accordance with the "Determination of light transmittance and haze of transparent plastics (GB / T 2410-2008)". The above three types of samples are cross-sectioned, and the process includes: sample cutting → cold mounting and fixing → 7-step grinding and polishing → gold spraying. The optical properties of the coating are measured using a Sannshi YH1600 color haze meter, with a light source of D65 (international standard artificial daylight, color temperature 6500 K) and a wavelength of 400-700 nm. The light transmittance in the dark area shall not be greater than 1%, and the light transmittance in the light area shall not be less than 10% to be judged as qualified.

[0023] Dark area shading includes light transmittance detection and pinhole light leakage detection, and light transmittance in the light area includes light transmittance detection and light transmittance uniformity detection. Among them, the pinhole light leakage detection uses a light source with an illumination of 500LUX to illuminate from behind, and observes from the front at a distance of 30cm to see if there is no pinhole or other light leakage phenomenon; light transmittance uniformity is measured by taking 8 points on the surface of the light area with a brightness meter to calculate the brightness uniformity, and the brightness uniformity is required to reach 70% or more to be qualified.

[0024] Adhesion test refers to "Paint and varnish cross-cut test (GB / T 9286-2021)" The test was conducted by selecting an area of ​​20 mm x 20 mm in the middle of the boundary between the light area and the light shielding area.

[0025] The test results are shown in Table 1: Table 1 Test results

[0026] The test results show that although the three embodiments use different processes, achieve different effects, and have different application scenarios, they can all pass the basic performance test of the decorative lamp, and under the conditions of 6000K fluorescent lamps and outdoor light at noon, no obvious boundary lines or different colors can be observed by naked eye observation at a distance of 30-50cm. It can be seen that this process solution can not only solve the problem that traditional visible and invisible decorative lamps cannot be applied to products with high environmental protection requirements due to the use of PU coatings, but also broaden the application prospects of magnetron sputtering vacuum coating, and can be applied to various application places such as home appliances, automobiles, home decoration, and art, increasing the aesthetics while bringing a new visual experience, thereby increasing the market competitiveness of magnetron sputtering vacuum coating.

Claims

1. A method for realizing the display and concealment of decorative lamps by using vacuum coating, characterized in that: The following steps are involved: S1. Pretreatment: Clean and dry the surface of the transparent PC substrate; S2, UV primer spraying: forming a primer coating on the functional surface of the substrate treated in S1; S3, vacuum coating light shielding layer primer: vacuum coating the functional surface of the substrate treated in S2 to form a dense light shielding layer; S4, laser engraving of light area: laser engraving is performed on the light area of ​​the substrate treated in S3 to remove the light shielding layer; S5, vacuum coating color adjustment: vacuum coating is performed on the functional surface of the substrate treated in S4 to form a uniform color development layer of vacuum coating; S6. UV top coating spraying: forming a top coating protective layer on the vacuum coating layer formed in S5.

2. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: The specific process of S1 is as follows: S1.

1. Use IPA clean cloth to wipe the PC material substrate twice in the dust removal cabinet to fully remove dust; S1.

2. Place the substrate treated in S1.1 into an oven and bake it at 80°C for 20 minutes. S1.

3. Hang the dried substrate on the secondary fixture, and hang the secondary fixture on the transport skid. Use an electrostatic dust removal gun to remove dust from the substrate, secondary fixture and transport skid.

3. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In S2, a spraying robot is used in the UV primer spraying process. Two spray guns are arranged at the end of the arm of the spraying robot. The air pressure of each spray gun is 3 kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10 cm ~ 20 cm, the spray room temperature is 20℃ ~ 25℃, and the spray room humidity is 45%RH ~ 55%RH.

4. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: The dynamic viscosity of the UV primer sprayed in S2 is 25 mPa·S -30 mPa·S, that is, the test temperature is 25°C, NK-2# viscosity cup is 8 seconds -11 seconds; the coating spray film thickness is controlled at 18μm ~24μm, the coating baking temperature is 45℃ ~55℃, the coating baking time is 5min ~8min, and the curing energy is UVB: 900 mj / cm 2 ~1100mj / cm 2 .

5. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In S3, the working target is a chromium target, the power range of the target is 13Kw ~ 17Kw, the running speed is 0.6m / min ~ 1m / min; the thickness of the magnetron sputtering metal film is controlled at 0.16um-0.23um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon setting value is 150Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH.

6. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In the S4, the laser engraving in the light area adopts a fiber laser, with a filling spacing of 0.1-0.15, a laser energy of 5%-20%, a laser engraving speed of 1000mm / s-1500mm / s, a frequency of 20kHZ, and a laser engraving depth greater than the thickness of the magnetron sputtering metal film layer and less than the sum of the metal film layer thickness and the primer thickness. The depth is controlled at 0.3um-1um.

7. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In S5, when the vacuum coating is adjusted, the target material is one or more combinations of aluminum, titanium, aluminum alloy, etc., the power range of the target material is 2Kw ~ 10Kw, the running speed is 2m / min ~ 3m / min, the thickness of the magnetron sputtering metal film is controlled at 0.05um-0.12um, and the vacuum degree in the chamber is 5×10 -7 Torr ~5×10 -5 Torr, argon setting value is 150Sccm; working environment temperature is 19℃~25℃, humidity is 45%RH~55%RH.

8. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In S6, a spraying robot is used in the UV topcoat spraying process. Two spray guns are arranged at the end of the arm of the spraying robot. The air pressure of each spray gun is 3 kgf / cm 2 ~5kgf / cm 2 , the distance between the spray gun and the substrate surface is 10cm~20cm, the spray room temperature is 20℃~25℃, and the spray room humidity is 45%RH~55%RH.

9. The method for realizing the display and concealment of decorative lamps by using vacuum coating according to claim 1, characterized in that: In S6, the dynamic viscosity of the UV topcoat sprayed coating is 25 mPa·S-28mPa·S, that is, the test temperature is 25°C, the NK-2# viscosity cup is 8 seconds-10 seconds; the coating spray film thickness is controlled at 18μm~25μm, the coating baking temperature is 50°C~60°C, the coating baking time is 5min~8min, and the curing energy is UVB: 1000 mj / cm 2 ~1200mj / cm 2 .

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