Integrated process for simulating anode bright edge on surface of plastic part

Abstract

The invention discloses an integrated process for simulating an anode bright edge on the surface of a plastic part, and belongs to the technical field of plastic surface treatment.The surface of the plastic part can show good metal texture and metal luster similar to those obtained after metal anode treatment through twice spraying, NCVM and three times of spraying treatment in sequence; the segment difference feeling between the bright edge and the matt surface on the appearance surface can be improved; compared with traditional metal anode process production, the process flow is short, the production time is short, the yield caused by objective factors can be avoided or reduced, and compared with a product obtained after metal plate anode treatment, a product obtained after plastic parts are matched with the process has the obvious cost advantage.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic part surface treatment, and particularly to an integrated process for imitating anodic bright edges on the plastic surface. Background Art

[0002] Surface anodization is a common surface treatment process for metal materials, which can significantly improve the hardness, insulation, corrosion resistance, wear resistance, heat resistance and other properties of metal parts, and can significantly improve the appearance texture and color of metal parts, with a very wide range of application fields. However, in production, the metal anodization process has many processes, a long production cycle, and it is difficult to effectively reduce the defective rate caused by objective factors, resulting in relatively high production costs.

[0003] Based on the current situation, the present invention aims to provide a plastic part surface treatment process that can present the luster and texture after metal anodization, and has relatively low costs and high production efficiency. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides an integrated process for imitating anodic bright edges on the plastic part surface. Through sequential two-time spraying, NCVM and three-time spraying treatments, a good metallic texture and metallic luster similar to those after metal anodization can be presented on the plastic part surface, and the step difference between the bright edge and the matte surface on the appearance surface can be improved; compared with the production of traditional metal anodization process, the process flow of the present invention is shorter, the production man-hours are shorter, and the yield rate caused by objective factors can be avoided or reduced. The products with the process of the present invention on plastic parts have obvious cost advantages compared with the products after metal plate anodization treatment.

[0005] To solve the above technical problems, a technical solution adopted by the present invention is as follows:

[0006] The integrated process for imitating anodic bright edges on the plastic part surface includes spraying and coating the appearance surface of the plastic part in a spray booth, and its processes sequentially include the following steps:

[0007] Step S1 - Spraying treatment agent: A treatment agent is prepared by uniformly mixing CR-SNC-1009 paint and SF-1032 hardener in a volume ratio of 100:2, and it is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 8 - 15um;

[0008] Step S2 - Spraying primer: A primer is prepared by uniformly mixing CR-SNZ3024, CR-SND2034 paints and SF-1032 hardener in a volume ratio of 150:100:5, and it is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 14 - 18um;

[0009] Step S3 - NCVM (Non - continuous electroplating): Hang the product in the evaporation plating furnace for electroplating treatment. The evaporation plating material is indium wire with a length of 2.9 - 3.1 cm. The first plating time is 8 - 12 seconds, the second plating time is 10 - 14 seconds, and the third plating time is 48 - 52 seconds;

[0010] Step S4 - Spray intermediate paint: The intermediate paint is made by uniformly mixing CR - SNZ3024 paint, solvent and / or color paint in an appropriate proportion. Use a spray gun to uniformly spray it on the appearance surface and bake and cure it to form a film with a thickness of 2 - 6 um;

[0011] Step S5 - First spray topcoat: The first bright topcoat is made by uniformly mixing CR - SNM4005 paint, CR - SNM40011 paint and SNY7009 solvent in a volume ratio of 20:60:19, and use a spray gun to uniformly spray it on the bright surface of the appearance surface. And / or the first matte topcoat is made by uniformly mixing CR - SNM4005 paint, CR - SNM40011 paint, SNY7009 solvent and SNY7021 solvent in a volume ratio of 20:60:19:19, and use a spray gun to uniformly spray it on the matte surface of the appearance surface. After completion, bake and cure it to form a film with a thickness of 17 - 23 um;

[0012] Step S6 - Second spray topcoat: The second bright topcoat is made by uniformly mixing CR - SNM4021 paint and CR - SF1024 hardener in a volume ratio of 100:1.5, and use a spray gun to uniformly spray it on the bright surface of the appearance surface. And / or the second matte topcoat is made by uniformly mixing CR - SNM4021 paint, CR - SF1024 hardener and SNY7009 solvent in a volume ratio of 100:1.5:20, and use a spray gun to uniformly spray it on the matte surface of the appearance surface. After completion, bake and cure it to form a film with a thickness of 5 - 10 um.

[0013] As a further elaboration of the above technical solution:

[0014] In the above technical solution, the baking temperature in Step S1 and Step S6 is between 45 - 55 °C, the baking temperature in Step S2 is between 50 - 60 °C, the baking temperature in Step S4 and Step S5 is between 55 - 65 °C, and the baking time is between 6 - 8 minutes for all of them.

[0015] In the above technical solution, before Step S3, there is also Step S30 - Preheat the plating furnace: Preheat the plating furnace for more than 1 hour and ensure that the internal temperature reaches above 70 °C.

[0016] In the above technical solution, in step S3, the voltage of the first stage is between 1.9 - 2.3V, the current is between 390 - 410A, and the coating time is between 8 - 12 seconds; the voltage of the second stage is between 2.3 - 2.7V, the current is between 790 - 810A, and the coating time is between 10 - 14 seconds; the voltage of the third stage is between 2.5 - 2.9V, the current is between 990 - 1010A, and the coating time is between 48 - 52 seconds.

[0017] In the above technical solution, in step S4, a silver intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint, CR - SNS6103 solvent, and CR - SNS6203 color paint according to a volume ratio of 100:0.7:0.5.

[0018] In the above technical solution, in step S4, a green intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint, CR - SNS6103 color paint, CR - SNS6230 color paint, and CR - SNS6401 color paint according to a volume ratio of 100:1.4:1.5:1.8.

[0019] In the above technical solution, in step S4, a patina intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint and CR - SNS6102 color paint according to a volume ratio of 100:6.

[0020] In the above technical solution, the temperature of the spray booth is between 20 - 30°C, and the humidity of the spray booth is between 40 - 75%RH; all the spray paints used in the spraying process need to be filtered through a 500 - mesh filter screen twice or more.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: By sequentially performing two sprayings, NCVM, and three spray treatments, the present invention can present a good metallic texture and metallic luster similar to that after metal anodizing on the surface of plastic parts, and can improve the step difference between the bright edge and the matte surface on the appearance surface; compared with the traditional metal anodizing process production, the process flow of the present invention is shorter, the production man - hour is shorter, and it can avoid or reduce the yield rate caused by objective factors. The product with the process of the present invention on plastic parts has an obvious cost advantage compared with the product after metal plate anodizing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the process flow block diagram of the present invention;

[0023] Figure 2 is the physical display diagram of the finished product after being processed by the imitation anodic bright edge integrated process in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present application, rather than being construed as a limitation to the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "several" and "multiple" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. As Figure 1 shown, the surface imitation anodic bright edge integral process for plastic parts includes spraying and coating the appearance surface of plastic parts in a spray booth, and its process sequentially includes the following steps:

[0026] Step S1 - Spraying the treatment agent: A treatment agent is made by uniformly mixing CR-SNC-1009 paint and SF-1032 hardener according to a volume ratio of 100:2, and it is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 8 - 15um;

[0027] Step S2 - Spraying primer: The primer is made by uniformly mixing CR - SNZ3024, CR - SND2034 coatings and SF - 1032 hardener in a volume ratio of 150:100:5. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a 14 - 18um thin film.

[0028] Step S3 - NCVM (Non - continuous plating): Hang the product in the evaporation plating furnace for plating treatment. The evaporation plating material is indium wire with a length of 2.9 - 3.1cm. The first plating time is 8 - 12 seconds, the second plating time is 10 - 14 seconds, and the third plating time is 48 - 52 seconds.

[0029] Step S4 - Spraying intermediate paint: The intermediate paint is made by uniformly mixing CR - SNZ3024 coating, solvent and / or color paint in an appropriate ratio. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a 2 - 6um thin film.

[0030] Step S5 - First spraying topcoat: The first bright topcoat is made by uniformly mixing CR - SNM4005 coating, CR - SNM40011 coating and SNY7009 solvent in a volume ratio of 20:60:19 and is evenly sprayed on the bright surface of the appearance surface with a spray gun, and / or the first matte topcoat is made by uniformly mixing CR - SNM4005 coating, CR - SNM40011 coating, SNY7009 solvent and SNY7021 solvent in a volume ratio of 20:60:19:19 and is evenly sprayed on the matte surface of the appearance surface with a spray gun. After completion, it is baked and cured to form a 17 - 23um thin film.

[0031] Step S6 - Second spraying topcoat: The second bright topcoat is made by uniformly mixing CR - SNM4021 coating and CR - SF1024 hardener in a volume ratio of 100:1.5 and is evenly sprayed on the bright surface of the appearance surface with a spray gun, and / or the second matte topcoat is made by uniformly mixing CR - SNM4021 coating, CR - SF1024 hardener and SNY7009 solvent in a volume ratio of 100:1.5:20 and is evenly sprayed on the matte surface of the appearance surface with a spray gun. After completion, it is baked and cured to form a 5 - 10um thin film.

[0032] Specifically, the baking temperature in Step S1 and Step S6 is between 45 - 55°C, the baking temperature in Step S2 is between 50 - 60°C, the baking temperature in Step S4 and Step S5 is between 55 - 65°C, and the baking time is between 6 - 8 minutes for all of them.

[0033] Further, before Step S3, there is also Step S30 - Preheating the plating furnace: Preheat the plating furnace for more than 1 hour and ensure that the internal temperature reaches above 70°C.

[0034] Specifically, in step S3, the voltage of the first stage is between 1.9 - 2.3V, the current is between 390 - 410A, and the coating time is between 8 - 12 seconds; the voltage of the second stage is between 2.3 - 2.7V, the current is between 790 - 810A, and the coating time is between 10 - 14 seconds; the voltage of the third stage is between 2.5 - 2.9V, the current is between 990 - 1010A, and the coating time is between 48 - 52 seconds.

[0035] In the application, appropriate color paints can be formulated and sprayed according to the base color of the plastic part and the required appearance color effect. In an embodiment of the present invention, in step S4, a silver intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint, CR - SNS6103 solvent, and CR - SNS6203 color paint in a volume ratio of 100:0.7:0.5; in another embodiment, in step S4, a green intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint, CR - SNS6103 color paint, CR - SNS6230 color paint, and CR - SNS6401 color paint in a volume ratio of 100:1.4:1.5:1.8; in yet another embodiment, in step S4, a patina intermediate paint is uniformly mixed and prepared from CR - SNZ3024 paint and CR - SNS6102 color paint in a volume ratio of 100:6.

[0036] Specifically, the temperature of the spray booth is between 20 - 30°C, and the humidity of the spray booth is between 40 - 75% RH; all the spray paints used in the spraying process need to be filtered through a 500 - mesh filter screen two or more times.

[0037] Figure 2 The figure shows the finished product diagram of the plastic middle frame in this embodiment after the imitation anodic bright edge integrated process of spraying silver intermediate paint. It can be seen that the surface of the plastic part presents a good metallic texture and metallic luster similar to that after metal anodic treatment, and the step difference between the bright edge and the matte surface on the appearance surface can be improved. In addition, compared with the production of traditional metal anodic processes, the process flow of the present invention is shorter, the production man - hours are shorter, and the yield rate caused by objective factors can be avoided or reduced. It has been verified that the yield rate of the process of the present invention can be increased by 20% compared with that of the metal anodic process, and the product using the plastic part with the process of the present invention has an obvious cost advantage compared with the product after metal plate anodic treatment.

[0038] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change, and modification made to the above - mentioned embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The integrated process of imitating anode bright edge on the surface of plastic parts is characterized by: The process includes spray coating the exterior surface of the plastic parts in a spray room, and the process includes the following steps in sequence: Step S1-spraying treatment agent: CR-SNC-1009 coating and SF-1032 hardener are uniformly mixed in a volume ratio of 100:2 to form a treatment agent, which is uniformly sprayed on the exterior surface with a spray gun and baked and cured to form a 8-15um film; Step S2-primer spraying: CR-SNZ3024, CR-SND2034 coatings and SF-1032 hardener are uniformly mixed in a volume ratio of 150:100:5 to form a primer, which is uniformly sprayed on the exterior surface with a spray gun and baked to form a 14-18um film; Step S3-NCVM (discontinuous electroplating): hang the product in an evaporation furnace for electroplating. The evaporation material is a 2.9-3.1 cm indium wire. The first coating time is 8-12 seconds, the second coating time is 10-14 seconds, and the third coating time is 48-52 seconds. Step S4-spraying the middle paint: CR-SNZ3024 paint, solvent and / or color paint are uniformly mixed in appropriate proportions to form the middle paint, which is evenly sprayed on the exterior surface with a spray gun and baked and cured to form a 2-6um film; Step S5-first topcoat spraying: CR-SNM4005 paint, CR-SNM40011 paint and SNY7009 solvent are uniformly mixed in a volume ratio of 20:60:19 to form a first bright topcoat, and the first bright topcoat is uniformly sprayed on the bright surface of the appearance surface with a spray gun, and / or CR-SNM4005 paint, CR-SNM40011 paint, SNY7009 solvent and SNY7021 solvent are uniformly mixed in a volume ratio of 20:60:19:19 to form a first matte topcoat, and the first matte topcoat is uniformly sprayed on the matte surface of the appearance surface with a spray gun, and after completion, it is baked and cured to form a 17-23um film; Step S6-second topcoat spraying: CR-SNM4021 paint and CR-SF1024 hardener are uniformly mixed in a volume ratio of 100:1.5 to form a second bright topcoat and sprayed evenly on the bright surface of the exterior surface with a spray gun, and / or CR-SNM4021 paint, CR-SF1024 hardener and SNY7009 solvent are uniformly mixed in a volume ratio of 100:1.5:20 to form a second matte topcoat and sprayed evenly on the matte surface of the exterior surface with a spray gun, and after completion, baked and cured to form a 5-10um film.

2. The integrated process for imitating anodized bright edges on the surface of plastic parts according to claim 1, characterized in that: The baking temperature in step S1 and step S6 is between 45-55° C., the baking temperature in step S2 is between 50-60° C., the baking temperature in step S4 and step S5 is between 55-65° C., and the baking time is between 6-8 minutes.

3. The integrated process for imitating anodized bright edges on the surface of plastic parts according to claim 1, characterized in that: The step S30-preheating the plating furnace is also included before the step S3: preheating the plating furnace for more than 1 hour and ensuring that the internal temperature reaches above 70°C.

4. The integrated process for imitating anode bright edge on the surface of plastic parts according to claim 3, characterized in that: In step S3, the voltage of the first section is between 1.9-2.3V, the current is between 390-410A, and the coating time is between 8-12 seconds; the voltage of the second section is between 2.3-2.7V, the current is between 790-810A, and the coating time is between 10-14 seconds; the voltage of the third section is between 2.5-2.9V, the current is between 990-1010A, and the coating time is between 48-52 seconds.

5. The integrated process for imitating anode bright edge on the surface of plastic parts according to claim 1, characterized in that: In the step S4, the CR-SNZ3024 coating, the CR-SNS6103 solvent and the CR-SNS6203 color paint are uniformly mixed in a volume ratio of 100:0.7:0.5 to prepare a silver intermediate paint.

6. The integrated process for imitating anodized bright edges on the surface of plastic parts according to claim 1, characterized in that: In the step S4, CR-SNZ3024 paint, CR-SNS6103 paint, CR-SNS6230 paint and CR-SNS6401 paint are uniformly mixed in a volume ratio of 100:1.4:1.5:1.8 to prepare a green intermediate paint.

7. The integrated process for imitating anodized bright edges on the surface of plastic parts according to claim 1, characterized in that: In the step S4, the CR-SNZ3024 paint and the CR-SNS6102 color paint are uniformly mixed in a volume ratio of 100:6 to prepare a tin color intermediate paint.

8. The integrated process for imitating anode bright edge on the surface of plastic parts according to any one of claims 1 to 7, characterized in that: The temperature of the spray room is between 20-30°C, and the humidity of the spray room is between 40-75%RH; the spray paint used in the spraying process must be filtered twice or more through a 500-mesh filter screen.

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