CN111676391A

CN111676391A - Method for manufacturing car logo

Info

Publication number: CN111676391A
Application number: CN202010534186.4A
Authority: CN
Inventors: 王金龙; 周卫琪
Original assignee: Suzhou Qishang Auto Parts Co ltd
Current assignee: Suzhou Qishang Auto Parts Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-09-18
Anticipated expiration: 2040-06-12
Also published as: CN111676391B

Abstract

The invention relates to a method for manufacturing a car logo, which comprises the steps of firstly preparing zinc alloy powder, and die-casting the zinc alloy powder into a car logo blank by a die casting machine; then, carrying out fine engraving processing on the vehicle logo blank, thinning and engraving the reflecting surface area to form a multi-angle reflecting surface and a black grid area, and thinning lines of grid lines; then carrying out surface gold plating treatment on the carved blank, carrying out surface activation in an activation solution after ultrasonic cleaning, immersing the neutralized blank into a plating bath solution for plating alkali copper, immersing the neutralized blank into the solution for plating acid bright copper, immersing the blank plated with the acid bright copper into a nickel plating bath solution for plating nickel, and immersing the blank plated with the nickel into the gold plating bath solution for plating the gold; and finally coloring, namely filling black single-component nitro paint in a black grid area, and filling red single-component nitro dye in a reflecting surface area. The zinc alloy powder with scientific proportion improves the surface hardness and the processing performance; the electroplating and coloring process is advanced, the stability and the weather resistance of the surface color are ensured, and the wear resistance and the discoloration resistance are improved.

Description

Method for manufacturing car logo

Technical Field

The invention relates to a manufacturing method of a car logo.

Background

At present, most of base materials of automobile logos are made of plastic materials, and the automobile logos are formed by performing surface treatment on the base materials of the automobile logos. The automobile logo is the mark of the automobile brand and is an indispensable part. The disadvantages are that: the surface coating of the automobile logo is easy to wear in the long-term use process. In addition, the automobile logo is a single part, has a single color and is a gold and silver bright monochromatic automobile logo.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, integrates the wire inlay color filling method of the traditional cloisonne enamel process in China, and provides a method for manufacturing a car logo.

The purpose of the invention is realized by the following technical scheme:

the manufacturing method of the car logo is characterized in that: the method comprises the following steps:

preparing zinc alloy powder, wherein the zinc alloy powder comprises the following components in percentage by mass: 65-88% of zinc, 3-15% of aluminum, 0.5-8% of copper and 4-17% of magnesium;

secondly, die-casting the zinc alloy powder into a car logo green body by a die-casting machine;

carrying out fine engraving processing on the die-cast car logo blank, and carrying out fine engraving processing on the reflecting surface area and the black grid area of the car logo blank by using a semicircular cutter;

thinning and carving the reflecting surface area to form a reflecting surface capable of reflecting light at multiple angles;

in the black grid area, lines of grid lines are thinned, and edge bulges are made;

and (IV) carrying out surface gold plating treatment on the refined carving blank, comprising the following steps:

41) fixing the blank on a hanging frame, and carrying out ultrasonic cleaning in a cleaning solution;

42) activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 3.5-5% of sulfuric acid, 3-7% of hydrofluoric acid and the balance of pure water; the activation temperature is 20-35 ℃, and the activation time is 25-35 minutes;

43) immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: 3-5.5 g/l of pure water solution of sodium cyanide is subjected to surface neutralization;

44) immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 12-35 g/l of cuprous cyanide, 65-86 g/l of sodium cyanide and the balance of pure water; the matching voltage is 3.5-5.5V, and the time is 5-8 minutes;

45) immersing the blank plated with the alkali copper into a solution for neutralization, wherein the ratio of the neutralization solution is as follows: 8-12% of sulfuric acid and the balance of pure water;

46) immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 45-70 mg/l of copper sulfate, 25-45 ml/l of sulfuric acid and the balance of pure water; the temperature is 20-35 ℃, and the time is 12-30 seconds;

47) immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 120-200 g/L of nickel sulfate, 12-25 g/L of nickel chloride and the balance of pure water, and dip-plating for 8-10 minutes at a voltage of 5.5-7.5V;

48) immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 0.8-1.2 g/l of gold potassium cyanide, 40-65 g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 8-11, and the gold potassium cyanide is subjected to immersion plating for 45-85 seconds under the voltage of 5.5-7.5V;

fifthly, placing the blank on a fixing frame for coloring;

filling black single-component nitro-paint in the black grid area, filling each diamond grid fully, standing after color filling, and entering an oven to cure the surface;

filling red single-component nitro dye in the reflecting surface area, drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing after filling is finished, and putting into an oven to cure the polymethyl methacrylate.

Further, the manufacturing method of the car logo comprises the following steps of (a) preparing zinc alloy powder by mass: 87.6 percent of zinc, 4.7 percent of aluminum, 1.2 percent of copper and 6.5 percent of magnesium.

Further, in the above method for manufacturing the emblem, in step 41), the ratio of the cleaning liquid is: 20-40 g/l of sodium carbonate, 30-60 g/l of trisodium phosphate, 0.5-3 ml/l of Op emulsifier and the balance of pure water.

Further, in the manufacturing method of the car logo, in the step 41), the cleaning time is 1-8 minutes, the cleaning temperature is 35-65 ℃, and hot air drying is performed after cleaning is completed.

Further, in the manufacturing method of the car logo, in step 43), the neutralization time is 25-35 seconds.

Further, in the manufacturing method of the car logo, in the step 45), the neutralization time is 5-12 seconds.

Further, in the manufacturing method of the car logo, in step 48), after dip coating, the blank is placed into an oven with the temperature of 160-180 ℃ for baking, and the baking time is 1.5-2 hours.

Further, the manufacturing method of the car logo comprises the step (V), black single-component nitro paint is filled in the black grid area, each diamond grid is filled fully, the car logo is placed for 20-40 minutes after color filling, then the car logo enters an oven and is baked for 25-40 minutes at 120-140 ℃, and the surface of the car logo is cured;

filling red single-component nitro dye in the reflecting surface area, drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing for 1-2 hours after filling, putting into an oven after standing, and baking for 2.5-4 hours at 150-180 ℃ to solidify the polymethyl methacrylate.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:

the zinc alloy powder is scientifically proportioned, so that the surface hardness and the processing performance of a product are improved, the density of a die casting is improved, and an air cavity is prevented from being generated inside the die casting; the prepared material has good fluidity in a molten state, and can better embody the details of a finished product; the zinc, aluminum, copper and magnesium are optimally configured, wherein the zinc powder is taken as a main body, if the pure zinc powder is easy to generate an air cavity during die casting, the surface smoothness is poor, the subsequent polishing and electroplating processes are not facilitated, and after the aluminum powder and the copper powder are added together, the compactness of a die-casting workpiece is remarkably improved, and the generation probability of the air cavity is greatly reduced; the magnesium powder is added, so that the hardness of the workpiece can be improved, and subsequent polishing and fine carving processing are facilitated; the design intention of a car logo designer is realized to the greatest extent, and the limitation of the conventional plastic process is broken through;

secondly, an advanced electroplating process is adopted, the fastness and the anti-tarnishing capacity of the plating layer are improved to the maximum extent through the matching of a plurality of electroplating processes, and the electroplating process effect is ensured by firstly carrying out ultrasonic cleaning to remove oil stains and impurities on the surface of a workpiece; then activating the surface in the activating solution, and activating the surface of the workpiece, so as to facilitate the next process; the neutralized blank is immersed in a plating bath solution for plating alkali copper, and the pre-plating of the alkali copper can improve the binding force between a basic plating layer and a workpiece and improve the plating layer fastness; the neutralized blank is immersed in the solution to be plated with acid bright copper, so that the glossiness of the workpiece is improved, the thickness of a plating layer of a nickel layer is reduced, and the surface effect of the workpiece is improved while the cost is reduced; immersing the blank plated with the acid bright copper into a nickel plating bath solution for nickel plating; finally, immersing the blank after nickel plating into a gold plating bath solution for gold plating; the electroplating process combination obviously reduces the output of wastewater in production, and has outstanding environmental protection and cost advantages; the stability and the weather resistance of the surface color of the vehicle logo are ensured;

thirdly, filling black single-component nitro-paint in the black grid area, wherein each diamond grid is filled fully; the red single-component nitro dye is filled in the reflecting surface area, and the wire inlay color filling technology is adopted, so that the color reduction degree is high, the wear resistance and the discoloration resistance can be greatly improved in the use process, and the weather resistance, the discoloration resistance and the color durability of the car logo are outstanding.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof.

Drawings

FIG. 1: a schematic front view of the car logo;

FIG. 2: schematic side view of car logo.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments will now be described in detail.

The key to the processes of vehicle logo selection, material selection and electroplating is that the use requirement of the vehicle logo product is high, the vehicle logo product is attractive, and the requirements on weather resistance, anti-tarnishing capability and overall strength are high.

The manufacturing method of the car logo, as shown in fig. 1 and 2, comprises the following steps:

carrying out fine engraving on the die-cast car logo blank, and carrying out fine engraving on a reflecting surface area (F area) and a black grid area (K area) of the car logo blank by using a semicircular cutter;

the reflecting surface area (F area) is thinned and carved to form a reflecting surface capable of reflecting light at multiple angles;

a black grid area (K area), wherein lines of grid lines are thinned, and edge bulges are made;

41) the blank is fixed on the hanger and is ultrasonically cleaned in the cleaning liquid, and the cleaning liquid is prepared from the following components in percentage by weight: 20-40 g/l of sodium carbonate, 30-60 g/l of trisodium phosphate, 0.5-3 ml/l of Op emulsifier and the balance of pure water, wherein the cleaning time is 1-8 minutes, the cleaning temperature is 35-65 ℃, and hot air drying is performed after cleaning; oil stains and impurities on the surface of the workpiece are removed, and the electroplating process effect is ensured;

42) activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 3.5-5% of sulfuric acid, 3-7% of hydrofluoric acid and the balance of pure water, wherein the activation temperature is 20-35 ℃, and the activation time is 25-35 minutes; the surface of the workpiece is activated, so that the next process is facilitated;

43) immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: 3-5.5 g/l of pure water solution of sodium cyanide is subjected to surface neutralization, and the neutralization time is 20-35 seconds;

44) immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 12-35 g/l of cuprous cyanide, 65-86 g/l of sodium cyanide and the balance of pure water, wherein the matching voltage is 3.5-5.5V, and the time is 5-8 minutes; the pre-plating of the alkali copper is to improve the binding force between a basic plating layer and a workpiece and improve the fastness of the plating layer;

45) immersing the blank plated with the alkali copper into a solution for neutralization, wherein the ratio of the neutralization solution is as follows: 8-12% of sulfuric acid and the balance of pure water, wherein the neutralization time is 5-12 seconds;

46) immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 45-70 mg/l of copper sulfate, 25-45 ml/l of sulfuric acid and the balance of pure water, wherein the temperature is 20-35 ℃, and the time is 12-30 seconds; the bright copper plating can improve the glossiness of the workpiece, reduce the thickness of a plating layer of a nickel layer, and improve the surface effect of the workpiece while reducing the cost;

47) immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 120-200 g/L of nickel sulfate, 12-25 g/L of nickel chloride and the balance of pure water, and dip-plating for 8-10 minutes under the voltage of 5.5-7.5V;

48) immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 0.8-1.2 g/l of gold potassium cyanide, 40-65 g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 8-11, the voltage is 5.5-7.5V, and the immersion plating is carried out for 45-85 seconds;

placing the blank into an oven with the temperature of 160-180 ℃ for high-temperature baking for 1.5-2 hours; performing thermal vibration inspection on the workpiece, and timely finding quality defects such as workpiece blistering and the like;

fifthly, placing the blank on a fixing frame for coloring;

filling black single-component nitro paint in a black grid area (K area), filling each diamond grid fully, standing for 20-40 minutes after color filling, entering an oven, and baking for 25-40 minutes at 120-140 ℃ to cure the surface;

filling red single-component nitro dye in the reflecting surface area (area F), drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing for 1-2 hours after filling, and then putting into an oven, baking for 2.5-4 hours at the temperature of 150-180 ℃ to solidify the polymethyl methacrylate.

Example 1

Preparing zinc alloy powder, wherein the zinc alloy powder comprises the following components in percentage by mass: 68.5 percent of zinc, 11.5 percent of aluminum, 8.7 percent of copper and 11.3 percent of magnesium;

die-casting the zinc alloy powder into a vehicle logo blank by a die casting machine;

carrying out surface gold plating treatment on the refined carving blank:

the blank is fixed on the hanger and is ultrasonically cleaned in the cleaning liquid, and the cleaning liquid is prepared from the following components in percentage by weight: 26g/l of sodium carbonate, 35g/l of trisodium phosphate, 1.4ml/l of Op emulsifier and the balance of pure water, wherein the cleaning time is 5 minutes, the cleaning temperature is 45 ℃, and hot air drying is performed after cleaning;

activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 4% of sulfuric acid, 5.5% of hydrofluoric acid and the balance of pure water, wherein the activation temperature is 25 ℃, and the activation time is 30 minutes;

immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: 3.5g/l of pure water solution of sodium cyanide, and performing surface neutralization for 24 seconds;

immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 15g/l of cuprous cyanide, 66g/l of sodium cyanide and the balance of pure water, wherein the matching voltage is 5.5V, and the time is 6 minutes;

immersing the blank plated with the alkali copper into a solution for neutralization, wherein the ratio of the neutralization solution is as follows: 9 percent of sulfuric acid and the balance of pure water, and the neutralization time is 8 seconds;

immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 50mg/l of copper sulfate, 28ml/l of sulfuric acid and the balance of pure water, wherein the temperature is 25 ℃, and the time is 23 seconds;

immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 135 g/L of nickel sulfate, 18 g/L of nickel chloride and the balance of pure water are subjected to dip plating for 11 minutes under the voltage of 5.5V;

immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 0.8g/l of gold potassium cyanide, 43g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 9, the voltage is 5.5V, and the immersion plating is carried out for 53 seconds;

placing the blank into an oven with the temperature of 170 ℃ for high-temperature baking for 2 hours;

coloring the blank on a fixing frame; filling black single-component nitro paint into a black grid area (K area), filling each diamond grid fully, standing for 30 minutes after filling, entering an oven, and baking for 30 minutes at 130 ℃ to cure the surface; filling red single-component nitro dye in the reflecting surface area (area F), drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and (3) standing for 1.5 hours after the filling is finished, and putting the mixture into an oven at the temperature of 160 ℃ for 3 hours after the standing is finished to solidify the polymethyl methacrylate.

Example 2

Preparing zinc alloy powder, wherein the zinc alloy powder comprises the following components in percentage by mass: 75.8 percent of zinc, 8.7 percent of aluminum, 6.2 percent of copper and 9.3 percent of magnesium;

carrying out surface gold plating treatment on the refined carving blank:

the blank is fixed on the hanger and is ultrasonically cleaned in the cleaning liquid, and the cleaning liquid is prepared from the following components in percentage by weight: 32g/l of sodium carbonate, 45g/l of trisodium phosphate, 1.2ml/l of Op emulsifier and the balance of pure water, wherein the cleaning time is 6 minutes, the cleaning temperature is 53 ℃, and hot air drying is performed after cleaning;

activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 3.7 percent of sulfuric acid, 4.8 percent of hydrofluoric acid and the balance of pure water, wherein the activation temperature is 25 ℃, and the activation time is 30 minutes;

immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: sodium cyanide solution 4.5g/l in pure water, and carrying out surface neutralization for 25 seconds;

immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 25g/l of cuprous cyanide, 76g/l of sodium cyanide and the balance of pure water, wherein the matching voltage is 5.5V, and the time is 6 minutes;

immersing the blank plated with the alkali copper into a solution for neutralization, wherein the ratio of the neutralization solution is as follows: 11% of sulfuric acid and the balance of pure water, wherein the neutralization time is 10 seconds;

immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 60mg/l of copper sulfate, 35ml/l of sulfuric acid and the balance of pure water, wherein the temperature is 25 ℃, and the time is 25 seconds;

immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 160 g/L of nickel sulfate, 19 g/L of nickel chloride and the balance of pure water are subjected to dip plating for 9 minutes under the voltage of 6.5;

immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 1.1g/l of gold potassium cyanide, 55g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 10, the voltage is 6.5V, and the immersion plating is carried out for 55 seconds;

placing the blank into an oven with the temperature of 190 ℃ for high-temperature baking for 2 hours;

coloring the blank on a fixing frame; filling black single-component nitro paint into a black grid area (K area), filling each diamond grid fully, standing for 30 minutes after filling, entering an oven, and baking for 30 minutes at 140 ℃ to cure the surface; filling red single-component nitro dye in the reflecting surface area (area F), drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing for 2 hours after the filling is finished, and baking for 3 hours in an oven at the temperature of 160 ℃ after the standing is finished to solidify the polymethyl methacrylate.

Example 3

Preparing zinc alloy powder, wherein the zinc alloy powder comprises the following components in percentage by mass: 80.6 percent of zinc, 8.4 percent of aluminum, 6.7 percent of copper and 4.3 percent of magnesium;

carrying out surface gold plating treatment on the refined carving blank:

the blank is fixed on the hanger and is ultrasonically cleaned in the cleaning liquid, and the cleaning liquid is prepared from the following components in percentage by weight: 37g/l of sodium carbonate, 55g/l of trisodium phosphate, 2.5ml/l of Op emulsifier and the balance of pure water, wherein the cleaning time is 6 minutes, the cleaning temperature is 55 ℃, and hot air drying is performed after cleaning;

activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 4.5 percent of sulfuric acid, 5.5 percent of hydrofluoric acid and the balance of pure water, wherein the activation temperature is 25 ℃, and the activation time is 25 minutes;

immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: sodium cyanide solution 4.7g/l in pure water, and carrying out surface neutralization for 30 seconds;

immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 30g/l of cuprous cyanide, 73g/l of sodium cyanide and the balance of pure water, wherein the matching voltage is 6.5V, and the time is 7 minutes;

immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 70mg/l of copper sulfate, 35ml/l of sulfuric acid and the balance of pure water, wherein the temperature is 25 ℃, and the time is 25 seconds;

immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 180 g/L of nickel sulfate, 22 g/L of nickel chloride and the balance of pure water are subjected to dip plating for 9 minutes under the voltage of 6.5V;

immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 1.17g/l of gold potassium cyanide, 58g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 10.6, the voltage is 65V, and the immersion plating is carried out for 68 seconds;

placing the blank into an oven with the temperature of 180 ℃ for high-temperature baking for 2 hours;

coloring the blank on a fixing frame; filling black single-component nitro paint into a black grid area (K area), filling each diamond grid fully, standing for 40 minutes after color filling, entering an oven, and baking for 40 minutes at 140 ℃ to cure the surface; filling red single-component nitro dye in the reflecting surface area (area F), drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing for 2 hours after the filling is finished, and putting the mixture into an oven to be baked for 4 hours at the temperature of 180 ℃ to solidify the polymethyl methacrylate.

Example 4

Preparing zinc alloy powder, wherein the zinc alloy powder comprises the following components in percentage by mass: 85.9% of zinc, 4.7% of aluminum, 4.1% of copper and 5.3% of magnesium;

carrying out surface gold plating treatment on the refined carving blank:

the blank is fixed on the hanger and is ultrasonically cleaned in the cleaning liquid, and the cleaning liquid is prepared from the following components in percentage by weight: 40g/l of sodium carbonate, 60g/l of trisodium phosphate, 2.7ml/l of Op emulsifier and the balance of pure water, wherein the cleaning time is 7 minutes, the cleaning temperature is 55 ℃, and hot air drying is performed after cleaning;

activating the surface of the cleaned blank in an activating solution, wherein the activating solution comprises the following components in percentage by weight: 5% of sulfuric acid, 6% of hydrofluoric acid and the balance of pure water, wherein the activation temperature is 35 ℃, and the activation time is 30 minutes;

immersing the activated blank into a neutralization solution, wherein the neutralization solution comprises the following components in percentage by weight: sodium cyanide solution 4.5g/l in pure water, and carrying out surface neutralization for 30 seconds;

immersing the neutralized blank into a plating bath solution for plating alkali copper, wherein the plating bath solution comprises the following components in percentage by weight: 33g/l of cuprous cyanide, 80g/l of sodium cyanide and the balance of pure water, wherein the matching voltage is 5.5V, and the time is 7 minutes;

immersing the blank plated with the alkali copper into a solution for neutralization, wherein the ratio of the neutralization solution is as follows: 12% of sulfuric acid and the balance of pure water, wherein the neutralization time is 11 seconds;

immersing the neutralized blank into a solution for plating acid bright copper, wherein the solution ratio is as follows: 68mg/l of copper sulfate, 42ml/l of sulfuric acid and the balance of pure water, wherein the temperature is 30 ℃, and the time is 25 seconds;

immersing the blank plated with the acidic bright copper into a nickel plating bath solution for nickel plating, wherein the nickel plating bath solution is prepared from the following components in parts by weight: 190 g/L of nickel sulfate, 24 g/L of nickel chloride and the balance of pure water are subjected to dip plating for 10 minutes under the voltage of 6.5V;

immersing the blank after nickel plating into a gold plating bath solution for gold plating, wherein the ratio of the gold plating bath solution is as follows: 1.2g/l of gold potassium cyanide, 60g/l of conductive salt and the balance of pure water, wherein the pH value of the plating solution is 11, the voltage is 7.5V, and the immersion plating is carried out for 80 seconds;

placing the blank into a drying oven with the temperature of 160 ℃ for high-temperature baking for 1.5 hours;

coloring the blank on a fixing frame; filling black single-component nitro paint into a black grid area (K area), filling each diamond grid fully, standing for 20 minutes after filling, entering an oven, and baking for 25 minutes at 120 ℃ to cure the surface; filling red single-component nitro dye in the reflecting surface area (area F), drying and curing after filling, and filling polymethyl methacrylate on the red surface, namely transparent color; and standing for 1 hour after the filling is finished, and baking for 2.5 hours in an oven at the temperature of 150 ℃ after the standing is finished to solidify the polymethyl methacrylate.

The car logos obtained in the embodiments 1-4 are tested according to the standards of ISO16750-3:2007 and ISO16750-4:2006 according to the regulations of the national automobile part product quality supervision and inspection center, and the temperature impact, vibration test, salt spray test, illumination test, chemical reagent resistance and the like are tested, and the test results are as follows: (test score 1 ~ 5, 1 is worst, 5 is best)

Experimental project	Example 1	Example 2	Example 3	Example 4
					Temperature shock	5	5	5	5
Vibration test	5	5	4.5	5
					Salt spray test	5	4.5	5	5
Illumination experiment	5	5	5	5
					Chemical resistance	4.5	5	4.5	4.5
Outdoor aging test	4.5	5	4.5	5

As can be seen from the table, the car logo manufactured by the method of the invention has various performances which reach or even exceed the corresponding national standards, and the test score is much higher than that of the car logo manufactured by other process methods of the same type at present.

According to the invention, zinc alloy powder is scientifically proportioned, the surface hardness and the processing performance of the product are improved, the density of the die casting is improved, and an air cavity is prevented from being generated inside the die casting; the material prepared according to the proportion has good fluidity in a molten state, and can better embody the details of a finished product; the zinc, aluminum, copper and magnesium are optimally configured, wherein the zinc powder is taken as a main body, if the pure zinc powder is easy to generate an air cavity during die casting, the surface smoothness is not good, the subsequent polishing and electroplating processes are not facilitated, the compactness of a die-casting workpiece is obviously improved after aluminum powder and copper powder are added, and the generation probability of the air cavity is greatly reduced; the magnesium powder is added, so that the hardness of the workpiece can be improved, and the subsequent polishing and engraving processing are facilitated.

The advanced electroplating process is adopted, the fastness and the anti-tarnishing capacity of the plating layer are improved to the maximum extent through the matching of the multi-layer electroplating process, the surface of a workpiece is cleaned by ultrasonic waves, oil stains and impurities on the surface of the workpiece are removed, and the effect of the electroplating process is ensured; then activating the surface in the activating solution, and activating the surface of the workpiece, so as to facilitate the next process; the neutralized blank is immersed in a plating bath solution for plating alkali copper, and the pre-plating of the alkali copper can improve the binding force between a basic plating layer and a workpiece and improve the plating layer fastness; the neutralized blank is immersed in the solution to be plated with acid bright copper, so that the glossiness of the workpiece is improved, the thickness of a plating layer of a nickel layer is reduced, and the surface effect of the workpiece is improved while the cost is reduced; immersing the blank plated with the acid bright copper into a nickel plating bath solution for nickel plating; finally, immersing the blank after nickel plating into a gold plating bath solution for gold plating; the electroplating process combination obviously reduces the output of waste water in production, and has outstanding advantages of environmental protection and cost.

Filling black single-component nitro paint into a black grid area (K area), wherein each diamond grid is filled fully; the reflecting surface area (area F) is filled with red single-component nitro dye, so that the weather resistance, the anti-tarnishing capability and the color durability of the vehicle logo are outstanding.

In conclusion, the zinc alloy powder is scientifically proportioned, so that the design intention of car logo designers can be realized to the greatest extent, and the limitation of the conventional plastic process is broken through; the electroplating process ensures the stability and weather resistance of the surface color of the car logo; the coloring process adopts a wire inlay color filling technology, so that the color reduction degree is high, and the wear resistance and the anti-discoloration performance can be greatly improved in the using process.

It should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; while the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. The manufacturing method of the car logo is characterized by comprising the following steps: the method comprises the following steps:

fifthly, placing the blank on a fixing frame for coloring;

2. The method for manufacturing a emblem according to claim 1, characterized in that: in the step (I), the zinc alloy powder comprises the following components in percentage by mass: 87.6 percent of zinc, 4.7 percent of aluminum, 1.2 percent of copper and 6.5 percent of magnesium.

3. The method for manufacturing a emblem according to claim 1, characterized in that: step 41), the mixture ratio of the cleaning liquid is as follows: 20-40 g/l of sodium carbonate, 30-60 g/l of trisodium phosphate, 0.5-3 ml/l of Op emulsifier and the balance of pure water.

4. The method for manufacturing a emblem according to claim 1, characterized in that: and step 41), cleaning for 1-8 minutes at 35-65 ℃, and drying by hot air after cleaning.

5. The method for manufacturing a emblem according to claim 1, characterized in that: and 43), neutralizing for 20-35 seconds.

6. The method for manufacturing a emblem according to claim 1, characterized in that: and step 45), the neutralization time is 5-12 seconds.

7. The method for manufacturing a emblem according to claim 1, characterized in that: and 48) after dip plating, putting the blank into an oven with the temperature of 160-180 ℃ for baking for 1.5-2 hours.

8. The method for manufacturing a emblem according to claim 1, characterized in that: filling black single-component nitro paint in a black grid area, filling each diamond grid fully, standing for 20-40 minutes after color filling, entering an oven, and baking for 25-40 minutes at 120-140 ℃ to cure the surface;