Plastic part surface imitation metal wiredrawing process
By using multiple spraying and NCVM processes on plastic parts, a film with a thickness of 80-400um is formed, which solves the problems of long brushing and high cost of surface wire drawing, and achieves a visual effect and texture similar to metal wire drawing.
Patent Information
- Application Number
- CN202510574779.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-07-11
AI Technical Summary
The surface wire drawing treatment of existing plastic parts has problems such as long production cycle, high cost and poor texture. Especially when applying the wire on the plastic parts, the wire is prone to turbidity and it is difficult to integrate with the plastic parts.
Using a process of combining multiple spraying and NCVM (discontinuous electroplating), a film with a thickness of 80-400um is formed by spraying multiple times on spraying treatment agents, primers, protective paints, topcoats, etc., and combined with ultrasonic cleaning and secondary spraying topcoat, a visual effect similar to the brushing of metal parts is formed.
The visual effect of forming a metal brushed wire on the plastic parts is achieved, with a short production cycle and low cost, and a better texture than traditional methods.
Smart Images
Figure CN120289851A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of plastic part surface treatment, and in particular to a plastic part surface imitation metal wire drawing process. Background Art
[0002] Products with brushed surfaces have excellent texture and are very popular among consumers. The current brushing process is generally carried out on metal substrates. The processing cycle from blanks to finished products is long, and it also requires a lot of manpower and material costs for material turnover, and the production cost is high. There are also products with similar brushing treatments on plastic parts, but generally the glue liquid is melted and the glue wire is coated on the plastic part according to the set texture, and then it is cooled and formed and then polished and shaped. However, the glue wire is easily affected by various subjective and objective factors during production, and it is easy to have problems such as turbidity of the glue wire and difficulty in integrating with the plastic part, and the texture is relatively poor. Summary of the invention
[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a plastic surface imitation metal brushing process, which is suitable for flat surfaces or simple curved surfaces with high surface finish. By sequentially performing multiple spraying + NCVM + multiple spraying treatments, the surface stress of the plastic substrate can be eliminated, its surface activity can be improved, and a thin film with a thickness of 80-400um can be formed on its surface, thereby achieving brushing treatment on its surface. Combined with subsequent ultrasonic cleaning and secondary spraying topcoat processes, a better visual effect similar to metal brushing can be formed. Compared with metal brushing production, it has a practical effect of similar appearance but shorter production cycle and lower cost.
[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is as follows:
[0005] The plastic part surface imitation metal brushing process includes spraying the polished plastic part surface in a spray room, and the spraying process includes the following steps in sequence:
[0006] Step S1-spraying treatment agent: 5073 paint and 051 thinner are uniformly mixed in a volume ratio of 100:5 to form a treatment agent, which is evenly sprayed on the exterior surface with a spray gun and baked and cured to form a 6-12um film;
[0007] Step S2-primer spraying: Use D85-211 paint crude oil as primer, spray it evenly on the exterior surface with a spray gun and bake and solidify to form a 20-25um film;
[0008] Step S3-NCVM (discontinuous electroplating): hang the product in a vacuum plating furnace for electroplating. The evaporation material is a 2.5-2.7 cm indium wire. 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.
[0009] Step S4 - Spraying protective paint: Prepare protective paint by uniformly mixing 800 - 202 paint and DF - 2 thinner in a volume ratio of 100:15. Spray it evenly on the appearance surface with a spray gun and bake it to cure, forming a 6 - 10um thin film.
[0010] Step S5 - First spraying topcoat: Use 910 - 71 paint crude oil as the first topcoat. Spray it evenly on the appearance surface with a spray gun and bake it to cure, forming a 25 - 35um thin film.
[0011] Step S6 - Wire drawing: Draw fine wires on the appearance surface, and the wire drawing depth is less than 70um.
[0012] Step S7 - Ultrasonic cleaning: Clean and dry the product surface.
[0013] Step S8 - Second spraying topcoat: Prepare the second topcoat by uniformly mixing 910 - 71 paint and P00E - 105 paint in a volume ratio of 90:10. Spray it evenly on the appearance surface with a spray gun and bake it to cure, forming a 2 - 6um thin film.
[0014] As a further elaboration of the above technical solution:
[0015] In the above technical solution, the baking temperature in both Step S1 and Step S2 is between 45 - 55°C, and the baking time is between 6 - 8 minutes.
[0016] In the above technical solution, in Step S3, the voltage in the first stage is between 1.9 - 2.3V, and the current is between 390 - 410A; the voltage in the second stage is between 2.3 - 2.7V, and the current is between 790 - 810A; the voltage in the third stage is between 2.5 - 2.9V, and the current is between 990 - 1010A.
[0017] In the above technical solution, between Step S4 and Step S5, there is also Step S41 - Spraying color paint: Prepare color paint by uniformly mixing 800 - 202 paint and DF - 2 thinner in a volume ratio of 100:5. Spray it evenly on the appearance surface with a spray gun and bake it to cure, forming a 6 - 12mm thin film.
[0018] In the above technical solution, the baking temperature in Step S5 is between 55 - 65°C, and the baking time is between 6 - 8 minutes.
[0019] In the above technical solution, the baking temperature in Step S8 is between 50 - 60°C, and the baking time is between 6 - 8 minutes.
[0020] In the above technical solution, in steps S2, S4, S5, and S8, several UV lamps are used to surround the plastic part for baking, and there are more than two UV lamps respectively arranged in the front, on the side, and at the rear of the appearance surface of the plastic part.
[0021] In the above technical solution, before step S1, there is also step S0 - grinding the appearance surface: using a fine grinding / abrasive tool to grind the appearance surface of the plastic part.
[0022] 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 50 - 75% RH. The spray coatings used in steps S1 - S5 and S8 need to be filtered through a 500 - mesh filter screen two or more times, and the atomization pressure and fan - shaped pressure of each spray gun are both 2.5 - 3.5 kg / cm².
[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is applicable to planes or simple curved surfaces with relatively high surface finish. By sequentially performing multiple spraying + NCVM + multiple spraying processes, the surface stress of the plastic substrate can be eliminated, its surface activity can be enhanced, and a film with a thickness of 80 - 400 μm can be formed on its surface, so as to realize wire drawing treatment on its surface. Cooperating with subsequent ultrasonic cleaning and secondary top - coat spraying processes, a better visual effect similar to wire drawing of metal parts can be formed. Compared with metal wire drawing production, it has the practical effects of similar appearance but shorter production cycle and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a process flow block diagram of the present invention;
[0025] Figure 2 is a physical display diagram of the finished product after being processed by the imitation metal wire drawing process in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The present invention will be further described in detail below with reference to the accompanying drawings.
[0027] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting 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 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 should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating 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 specified and limited, the terms "installed", "connected", "connected", "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 specified 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", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.
[0028] As Figure 1 shown, the surface imitation metal wire drawing process of the plastic part includes: spraying the appearance surface of the polished plastic part in the spraying booth, and the spraying process sequentially includes the following steps:
[0029] Step S1 - Spraying the treatment agent: Mix 5073 paint and 051 thinner evenly at a volume ratio of 100:5 to make the treatment agent, and spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 6 - 12um thin film;
[0030] Step S2 - Spraying primer: Using D85-211 coating crude oil as the primer, spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 20-25um thin film;
[0031] Step S3 - NCVM (Non-Conductive Vacuum Metallization): Hang the product in a vacuum plating furnace for electroplating treatment. The evaporation plating material is indium wire with a length of 2.5-2.7cm. 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;
[0032] Step S4 - Spraying protective paint: Mix 800-202 coating and DF-2 thinner evenly at a volume ratio of 100:15 to make the protective paint. Spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 6-10um thin film;
[0033] Step S5 - First spraying topcoat: Using 910-71 coating crude oil as the first topcoat, spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 25-35um thin film;
[0034] Step S6 - Wire drawing: Draw fine wires on the appearance surface, and the wire drawing depth is less than 70um;
[0035] Step S7 - Ultrasonic cleaning: Clean and dry the product surface;
[0036] Step S8 - Second spraying topcoat: Mix 910-71 coating and P00E-105 coating evenly at a volume ratio of 90:10 to make the second topcoat. Spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 2-6um thin film.
[0037] Specifically, the baking temperature in both Step S1 and Step S2 is between 45-55°C, and the baking time is between 6-8 minutes.
[0038] Specifically, in Step S3, the voltage in the first stage is between 1.9-2.3V, and the current is between 390-410A; the voltage in the second stage is between 2.3-2.7V, and the current is between 790-810A; the voltage in the third stage is between 2.5-2.9V, and the current is between 990-1010A.
[0039] Furthermore, between Step S4 and Step S5, there is also Step S41 - Spraying color paint: Mix 800-202 coating and DF-2 thinner evenly at a volume ratio of 100:5 to make the color paint. Spray it evenly on the appearance surface with a spray gun and bake and cure it to form a 6-12mm thin film. In application, appropriate color paint can be formulated and sprayed according to the base color of the plastic part and the required appearance color effect.
[0040] Specifically, the baking temperature in step S5 is between 55 - 65°C, and the baking time is between 6 - 8 minutes.
[0041] Specifically, the baking temperature in step S8 is between 50 - 60°C, and the baking time is between 6 - 8 minutes.
[0042] Specifically, in steps S2, S4, S5, and S8, baking is carried out by surrounding the plastic parts with several UV lamps. There are more than two UV lamps in the front, on the sides, and at the back of the appearance surface of the plastic parts.
[0043] Further, before step S1, there is also step S0 - grinding the appearance surface: using a fine grinding / polishing tool to grind the appearance surface of the plastic parts. It can be understood that the present invention is applicable to planes or simple curved surfaces with relatively high surface finish. The grinding process before the spraying process can enhance the surface finish of the substrate to improve the subsequent spraying adhesion effect.
[0044] Specifically, the temperature in the spray booth is between 20 - 30°C, and the humidity in the spray booth is between 50 - 75% RH. The spray paint used in steps S1 - S5 and S8 needs to be filtered through a 500 - mesh filter screen two or more times. The atomization pressure and fan - shaped pressure of each spray gun are both 2.5 - 3.5 kg / cm^2.
[0045] Figure 2 The finished product diagram of the imitation metal wire - drawing process in this embodiment is shown. The plastic base is a black ABS board. After treatment, it can be seen that a tarnished metal wire - drawing effect appears on its appearance surface.
[0046] The present invention is applicable to planes or simple curved surfaces with relatively high surface finish. By sequentially performing multiple spraying + NCVM + multiple spraying treatments, the surface stress of the plastic substrate can be eliminated, its surface activity can be enhanced, and a film with a thickness of 80 - 400 um can be formed on its surface, so as to realize wire - drawing treatment on its surface. Cooperating with the subsequent ultrasonic cleaning and secondary spraying top - coat process, a better visual effect similar to that of metal parts with wire - drawing can be formed. Compared with metal wire - drawing production, it has the practical effects of similar appearance but shorter production cycle and lower cost.
[0047] 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 solutions of the present invention.
Claims
1. The process of imitating metal wire drawing on the surface of plastic parts is characterized in that, It includes spraying the appearance surface of the polished plastic part in a spray booth, and the spraying process sequentially includes the following steps: Step S1 - Spraying treatment agent: A treatment agent is made by uniformly mixing 5073 paint and 051 thinner in a volume ratio of 100:
5. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 6 - 12 um; Step S2 - Spraying primer: Using D85 - 211 paint crude oil as the primer, it is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 20 - 25 um; Step S3 - NCVM (Non - Continuous Vacuum Metallization): Hang the product in a vacuum plating furnace for electroplating treatment. The evaporation plating material is indium wire with a length of 2.5 - 2.7 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; Step S4 - Spraying protective paint: A protective paint is made by uniformly mixing 800 - 202 paint and DF - 2 thinner in a volume ratio of 100:
15. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 6 - 10 um; Step S5 - First spraying topcoat: Using 910 - 71 paint crude oil as the first topcoat, it is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 25 - 35 um; Step S6 - Wire drawing: Draw fine wires on the appearance surface, and the wire drawing depth is less than 70 um; Step S7 - Ultrasonic cleaning: Clean and dry the product surface; Step S8 - Second spraying topcoat: A second topcoat is made by uniformly mixing 910 - 71 paint and P00E - 105 paint in a volume ratio of 90:
10. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 2 - 6 um.
2. The plastic part surface imitation metal wire drawing process according to claim 1, characterized in that, The baking temperature in both Step S1 and Step S2 is between 45 - 55 °C, and the baking time is between 6 - 8 minutes.
3. The plastic part surface imitation metal wire drawing process according to claim 1, characterized in that, In Step S3, the voltage in the first stage is between 1.9 - 2.3 V, and the current is between 390 - 410 A; the voltage in the second stage is between 2.3 - 2.7 V, and the current is between 790 - 810 A; the voltage in the third stage is between 2.5 - 2.9 V, and the current is between 990 - 1010 A.
4. The plastic part surface imitation metal wire drawing process according to claim 1, characterized in that, Between Step S4 and Step S5, there is also Step S41 - Spraying color paint: A color paint is made by uniformly mixing 800 - 202 paint and DF - 2 thinner in a volume ratio of 100:
5. It is evenly sprayed on the appearance surface with a spray gun and baked and cured to form a film with a thickness of 6 - 12 mm.
5. The plastic part surface imitation metal wire drawing process according to claim 1, characterized in that, The baking temperature in Step S5 is between 55 - 65 °C, and the baking time is between 6 - 8 minutes.
6. The surface imitation metal wire drawing process for plastic parts according to claim 1, characterized in that, The baking temperature in Step S8 is between 50 - 60 °C, and the baking time is between 6 - 8 minutes.
7. The surface imitation metal wire drawing process for plastic parts according to claim 1, characterized in that, In Step S2, Step S4, Step S5, and Step S8, baking is carried out by surrounding the plastic part with several UV lamps. There are more than two UV lamps in the front, on the side, and at the back of the appearance surface of the plastic part.
8. The plastic part surface imitation metal wire drawing process according to claim 1, characterized in that, Before Step S1, there is also Step S0 - Grinding the appearance surface: Grind the appearance surface of the plastic part using a fine grinding / abrasive tool.
9. The plastic part surface imitation metal wire drawing process according to any one of claims 1-8, characterized in that, The temperature of the spray booth is between 20-30°C, and the humidity of the spray booth is between 50-75% RH. The spray coatings used in steps S1-S5 and step S8 need to be filtered through a 500-mesh filter screen twice or more. The atomizing pressure and fan-shaped pressure of each spray gun are both 2.5-3.5 kg / cm².