Aluminum coin-shaped product and production process and application thereof

Abstract

The invention provides an aluminum coin-shaped product and a production process and application thereof, and relates to the technical field of aluminum products. The invention relates to an aluminum coin-shaped product, which is prepared by the following steps of: stamping an aluminum plate or slicing an aluminum bar to manufacture an aluminum sheet; the aluminum sheets are subjected to numerical control machining to be manufactured into aluminum wafers of different sizes, then oxidation, dyeing and printing are conducted, and a finished product is obtained; the oxidation process comprises the following steps: firstly, deoiling and descaling an aluminum wafer, and then carrying out oxidation treatment by using an anodic oxidation electrolyte. The aluminum coin-shaped product is easy to operate and convenient to produce, the aluminum coin-shaped product which is good in texture and high in strength and has the metallic luster sense can be obtained, and meanwhile the aluminum coin-shaped product further has good abrasion resistance and light weight.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum products, and in particular to an aluminum coin-shaped product and a production process and application thereof. Background Art

[0002] At present, the materials commonly used for coin-shaped products in entertainment products are: plastic, clay, ceramics, copper, iron, zinc alloy, etc. However, plastic, clay, and ceramics cannot present metallic luster in color, cannot achieve the texture of metal in texture, are not wear-resistant, and are easy to break. In addition, plastic and clay coin-shaped products have iron sheets in the middle, which will be attracted by magnets, and the integrity of the structure is relatively poor. Copper, iron, zinc alloy, etc. have high density, and are too heavy for the same size, making them difficult to carry or transport, and they will also rust and oxidize. Summary of the invention

[0003] The purpose of the present invention is to provide a production process for aluminum coin-shaped products, which is simple to operate and easy to produce, and can obtain aluminum coin-shaped products with good texture, high strength and metallic luster.

[0004] Another object of the present invention is to provide an aluminum coin-shaped product with good wear resistance and light weight.

[0005] Another object of the present invention is to provide an aluminum coin-shaped product for use in entertainment, promotional, and advertising products, which can expand the use of aluminum products, improve the wear resistance of the products, and enhance the texture of the products.

[0006] The present invention solves the technical problem by adopting the following technical solutions.

[0007] The present invention provides a production process for an aluminum coin-shaped product, comprising the following steps:

[0008] Aluminum sheets are made by stamping aluminum sheets or slicing aluminum bars;

[0009] The aluminum sheets are processed by CNC into aluminum discs of different sizes, and then oxidized, dyed, and printed to obtain the finished products;

[0010] The oxidation process is as follows: firstly, the aluminum disc is degreased and descaled, and then oxidized with an anodic oxidation electrolyte.

[0011] The present invention provides an aluminum coin-shaped product produced by the above-mentioned production process of aluminum coin-shaped products.

[0012] The present invention proposes an application of the aluminum coin-shaped product as described above in entertainment, promotion and advertising products.

[0013] The present invention has at least the following beneficial effects:

[0014] In the present invention, aluminum plates or aluminum rods are used as raw materials to make coin-shaped products. The soft characteristics of aluminum material are utilized to improve the processing speed of aluminum discs, so as to facilitate faster and better aluminum discs. In addition, aluminum material is light, so that the obtained aluminum discs are lighter in weight, which is convenient for the transportation and carrying of finished products. The aluminum discs are numerically controlled to produce aluminum discs of different specifications, which are suitable for use in different scenes and are highly practical. The aluminum discs after numerical control processing are then degreased and descaled, so that the compactness of the oxide film formed on the surface of the aluminum disc during the oxidation process can be improved, thereby improving the wear resistance and corrosion resistance of the aluminum disc. The oxidized aluminum discs are then directly dyed, so that it is easier for the dye solution to infiltrate the oxide film layer, improve the color fastness, and obtain aluminum discs of different colors to meet people's different requirements for color. Then printing is performed, and different patterns or marks can be printed on the surface of the aluminum discs so that the aluminum discs are suitable for different fields. Using aluminum as raw material, through CNC processing, oxidation, dyeing and printing, we can obtain aluminum coin-shaped products with good texture, high strength, metallic luster, good wear resistance and light weight, which is convenient for expanding the use of aluminum products. It can not only be used in entertainment products, but also in gift promotions, advertising and other products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the product structure of Example 1;

[0016] Figure 2 This is a schematic diagram of the product structure of Example 4 or 5. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to specific embodiments.

[0019] A production process for an aluminum coin-shaped product comprises the following steps:

[0020] Aluminum sheets are made by stamping aluminum sheets or slicing aluminum bars;

[0021] The aluminum sheets are processed by CNC into aluminum discs of different sizes, and then oxidized, dyed, and printed to obtain the finished products;

[0022] The oxidation process is as follows: the aluminum disc is degreased and descaled, and then oxidized with an anodic oxidation electrolyte.

[0023] Aluminum plates or aluminum bars are used as raw materials to make coin-shaped products. The soft characteristics of aluminum are used to increase the processing speed of aluminum discs, so that aluminum discs can be obtained faster and better. In addition, aluminum is light, which can make the obtained aluminum discs lighter, which is convenient for the transportation and carrying of finished products. The aluminum discs are CNC-processed to produce aluminum discs of different specifications to suit different scenarios and are highly practical. The aluminum discs after CNC processing are then degreased and descaled, which can improve the density of the oxide film formed on the surface of the aluminum disc during the oxidation process, thereby improving the wear resistance and corrosion resistance of the aluminum disc. The oxidized aluminum discs are then directly dyed, which makes it easier for the dye to infiltrate the oxide film layer, improves the color fastness, and can obtain aluminum discs of different colors to meet people's different requirements for color. Then printing is performed, and different patterns or marks can be printed on the surface of the aluminum discs so that the aluminum discs can be used in different fields. By using aluminum as raw material, through stamping, oxidation, dyeing and printing, we can obtain aluminum coin-shaped products with good texture, high strength, metallic luster, good wear resistance and light weight, which is convenient for expanding the use of aluminum products.

[0024] In this embodiment, the thickness of the aluminum disc is 3-4mm and the diameter is 35-45mm. Specifically, the aluminum disc can be of the following sizes: such as 42mm×42mm×4mm, 40mm×40mm×3.2mm or 39mm×39mm×3.2mm. In other embodiments, it can also be of other sizes. In this way, aluminum discs of different sizes can be obtained as needed, thereby obtaining coin-shaped products of different sizes, which can increase its application range so as to be suitable for different types of entertainment products, such as game consoles. In other embodiments, the aluminum sheet can also be made into other different shapes for use in products such as gift promotions and advertisements.

[0025] In this embodiment, after the aluminum sheet is processed by CNC machining and before oxidation, at least one groove is punched or hydraulically pressed on the surface of the aluminum disc, the punching or hydraulic pressure is 60-120 tons, the depth of the groove is 0.1-0.2mm, and polishing is performed after punching or hydraulic pressure. By punching or hydraulically pressing grooves on the surface of the aluminum disc, aluminum discs with different shapes on the surface can be obtained, and then aluminum discs of different styles can be obtained to meet the needs of different users and expand the application range of aluminum discs. Under the above-mentioned punching or hydraulic pressure, the situation where the aluminum disc is damaged by excessive pressure can be avoided, and the situation where the surface of the aluminum disc is difficult to form due to insufficient pressure can also be avoided. After stamping or hydraulic pressure, polishing can also be performed to make the surface of the product smoother and brighter. In other embodiments, the surface of the aluminum disc can also be flat.

[0026] In this embodiment, the degreasing and descaling process is as follows: the aluminum disc is soaked in a degreasing agent at 60-80°C for 20-40 minutes, then rinsed with hot water, then soaked in an alkaline solution for 30-50 minutes, pickled with sulfuric acid for 3-5 seconds, and finally rinsed with clean water. By soaking the aluminum disc in the degreasing agent, the oil stains on the surface of the aluminum disc are removed by using the degreasing performance of the degreasing agent to improve the compactness of the oxide film on the surface of the aluminum disc in the subsequent oxidation process, improve the adhesion of the oxide film on the surface of the aluminum disc, and then improve the protective effect of the oxide film on the aluminum disc. After rinsing with hot water, soak it in an alkaline solution, and the alkaline solution can be used to remove oil again, and other dirt on the surface of the aluminum disc can also be removed. Then, the alkaline solution is neutralized by acid, and the surface oxide layer and other insoluble substances can also be removed by acid, and then rinsed with clean water to complete the degreasing and descaling operation. Under the above conditions, the degreasing and descaling effect on the surface of the aluminum disc is better.

[0027] In this embodiment, the degreasing agent includes, by weight, 1-10 parts of triethanolamine oleic acid soap, 1-3 parts of isopropyl alcohol, 2-7 parts of sodium silicate, 3-8 parts of sodium molybdate, 1-5 parts of citric acid and 1-3 parts of hydroxyethylidene diphosphonic acid.

[0028] Triethanolamine oleic acid soap is a nonionic surfactant that has good cleaning ability for animal and vegetable oils, mineral oils, motor oils, paraffin, lubricating oils, etc., and also has good anti-rust ability. Isopropyl alcohol has good solubility for lipophilic substances. Sodium silicate has good surface activity and certain saponification ability. When used in combination with triethanolamine oleic acid soap, it can improve the degreasing effect. At the same time, it has a certain corrosion inhibition effect on aluminum, which is beneficial to improve the protective effect on aluminum. Sodium molybdate is used as a metal corrosion inhibitor to improve the corrosion protection of products. Citric acid can react chemically with alkaline substances in oils and fats to form salts and water. Salts have good solubility and can disperse oils and fats in water, making oil stains easier to clean; it also has good chelating ability and can form stable complexes with metal ions, thereby reducing the adhesion and fixation of oil stains; at the same time, it has good emulsifying properties. The citric acid molecule contains hydrophilic and hydrophobic parts, which can mix water and oil molecules together to form an emulsion, which can wrap oil stains in the emulsion and suspend them in water, making them easier to clean. Hydroxyethylene diphosphonic acid can dissociate into five positive and negative ions in water, and can chelate with divalent metal ions in water, so it has a good anti-scaling effect. Through the combination of the above raw materials, the oil stains on the surface of the aluminum disc can be better removed, and the dirt can also be removed to achieve a good oil removal and scale removal effect. In addition, it can also play an anti-corrosion and anti-scaling role to improve the physical and chemical properties of the product.

[0029] In this embodiment, during the oxidation treatment, the temperature is 20-25°C, the voltage is 18-22V, and the current is 1-2A / dm 2Under the condition of , the oxidation treatment is carried out for 20-28 minutes. This can make the density and thickness of the oxide film formed on the surface of the aluminum disc better, so as to improve the physical and chemical properties of the aluminum disc.

[0030] In this embodiment, the dyeing process is: immerse the oxidized aluminum disc in a dye solution with a temperature of 35-45°C and a pH of 6-6.5 for 10-20 minutes. During the immersion process, the dye solution gradually penetrates into the oxide film layer, thereby obtaining products of different colors. The porosity of the oxide film can improve the adhesion of the dye solution on the surface of the product, thereby improving the combination effect of the dye solution and the product, and preventing it from fading easily.

[0031] In this embodiment, printing is UV printing, screen printing, thermal transfer or laser engraving. Different patterns or marks can be printed on the surface of the product by printing to meet different usage requirements. In other embodiments, stickers can be attached to the surface of the dyed aluminum disc to obtain products of different styles.

[0032] An aluminum coin-shaped product has better wear resistance than coins currently on the market made of plastic, ceramic or clay, and has a lighter weight than coins made of copper, iron, zinc alloy, etc., so that an aluminum coin-shaped product with good texture, high strength, metallic luster, good wear resistance and light weight can be obtained.

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] Example 1

[0035] A production process for an aluminum coin-shaped product comprises the following steps:

[0036] S1. Aluminum sheets are made by stamping aluminum plates;

[0037] S2, CNC machining the aluminum sheet to produce an aluminum disc having a groove on the surface, wherein the size of the aluminum disc is 42 mm×42 mm×4 mm, and the depth of the groove is 0.2 mm;

[0038] S3, soak the aluminum disc with degreasing agent at 60℃ for 20min, then rinse with hot water, soak in alkali solution for 30min, pickle with sulfuric acid for 3s, and finally rinse with clean water. Use anodizing electrolyte on the rinsed aluminum disc at a temperature of 20℃, a voltage of 18V, and a current of 1A / dm 2 Under the conditions of , oxidation treatment was carried out for 20 min;

[0039] S4, immersing the oxidized aluminum disc in a dye solution at a temperature of 35°C and a pH of 6 for 10 minutes;

[0040] S5. Use UV printing to obtain the finished product.

[0041] In this embodiment, the degreasing agent is 1g of triethanolamine oleic acid soap, 1g of isopropyl alcohol, 2g of sodium silicate, 3g of sodium molybdate, 1g of citric acid and 1g of hydroxyethylidene diphosphonic acid. The preparation method is: mix the raw materials, add 30mL of distilled water and stir evenly to obtain the degreasing agent.

[0042] Example 2

[0043] A production process for an aluminum coin-shaped product comprises the following steps:

[0044] S1. Aluminum sheets are made by stamping aluminum plates;

[0045] S2. Processing the aluminum sheet by CNC machine into an aluminum disc with a size of 40 mm×40 mm×4 mm, punching a plurality of grooves on the surface of the aluminum disc with a punching pressure of 80 tons and a depth of 0.1 mm, and polishing after punching;

[0046] S3, soak the polished aluminum disc with degreasing agent at 65℃ for 25min, then rinse with hot water, soak in alkali solution for 35min, pickle with sulfuric acid for 4s, and finally rinse with clean water. Use anodizing electrolyte for the rinsed aluminum disc at a temperature of 21℃, a voltage of 19V, and a current of 1.2A / dm 2 Under the conditions of , oxidation treatment was carried out for 21 min;

[0047] S4, immersing the oxidized aluminum disc in a dye solution with a temperature of 37°C and a pH of 6.2 for 2 minutes;

[0048] S5. Use screen printing to obtain the finished product.

[0049] In this embodiment, the degreasing agent is 3g of triethanolamine oleic acid soap, 2g of isopropyl alcohol, 3g of sodium silicate, 4g of sodium molybdate, 2g of citric acid and 2g of hydroxyethylidene diphosphonic acid. The preparation method is: mix the raw materials, add 30mL of distilled water and stir evenly to obtain the degreasing agent.

[0050] Example 3

[0051] A production process for an aluminum coin-shaped product comprises the following steps:

[0052] S1. Aluminum sheets are made by stamping aluminum plates;

[0053] S2, CNC machining the aluminum sheet into an aluminum disc, the size of the aluminum disc is 40 mm×40 mm×3.2 mm, and the surface of the aluminum disc is flat;

[0054] S3, then soak the aluminum disc with degreasing agent at 70℃ for 30min, then rinse with hot water, soak in alkali solution for 40min, pickle with sulfuric acid for 4s, and finally rinse with clean water. The rinsed aluminum disc is anodized with electrolyte at a temperature of 23℃, a voltage of 20V, and a current of 1.5A / dm 2 Under the conditions of , oxidation treatment was carried out for 23min;

[0055] S4, immersing the oxidized aluminum disc in a dye solution having a temperature of 38°C and a pH of 6.1 for 15 minutes;

[0056] S5. Use thermal transfer to obtain the finished product.

[0057] In this embodiment, the degreasing agent is 5g of triethanolamine oleic acid soap, 1g of isopropyl alcohol, 4g of sodium silicate, 5g of sodium molybdate, 3g of citric acid and 2g of hydroxyethylidene diphosphonic acid. The preparation method is: mix the raw materials, add 30mL of distilled water and stir evenly to obtain the degreasing agent.

[0058] Example 4

[0059] A production process for an aluminum coin-shaped product comprises the following steps:

[0060] S1, cutting aluminum bars into aluminum sheets;

[0061] S2. Processing the aluminum sheet by CNC machine into an aluminum disc with a size of 39 mm×39 mm×3.2 mm, punching a plurality of grooves on the surface of the aluminum disc with a punching pressure of 100 tons and a depth of 0.2 mm, and polishing after punching;

[0062] S3, soak the polished aluminum disc with degreasing agent at 75℃ for 35min, then rinse with hot water, soak in alkali solution for 45min, pickle with sulfuric acid for 3s, and finally rinse with clean water. Use anodizing electrolyte to anodic oxidation at 24℃, voltage of 21V, and current of 1.8A / dm 2 Under the conditions of , oxidation treatment was carried out for 25min;

[0063] S4, immersing the oxidized aluminum disc in a dye solution having a temperature of 42°C and a pH of 6.4 for 18 minutes;

[0064] S5. Use laser engraving to obtain the finished product.

[0065] In this embodiment, the degreasing agent is 8g of triethanolamine oleic acid soap, 2g of isopropyl alcohol, 5g of sodium silicate, 6g of sodium molybdate, 4g of citric acid and 2g of hydroxyethylidene diphosphonic acid. The preparation method is: mix the raw materials, add 30mL of distilled water and stir evenly to obtain the degreasing agent.

[0066] Example 5

[0067] A production process for an aluminum coin-shaped product comprises the following steps:

[0068] S1, cutting aluminum bars into aluminum sheets;

[0069] S2. Processing the aluminum sheet into an aluminum disc by CNC machining, the size of the aluminum disc is 40 mm×40 mm×4 mm, hydraulically forming a plurality of grooves on the surface of the aluminum disc, the hydraulic pressure is 120 tons, the depth of the groove is 0.2 mm, and polishing is performed after hydraulic pressure;

[0070] S3, soak the polished aluminum disc with degreasing agent at 80℃ for 40min, then rinse with hot water, soak in alkali solution for 50min, pickle with sulfuric acid for 5s, and finally rinse with clean water. Use anodizing electrolyte to anodic oxidation of the rinsed aluminum disc at a temperature of 25℃, a voltage of 22V, and a current of 2A / dm 2 Under the conditions of , oxidation treatment was carried out for 28min;

[0071] S4, immersing the oxidized aluminum disc in a dye solution at a temperature of 45°C and a pH of 6.5 for 20 minutes;

[0072] S5. Use UV printing to obtain the finished product.

[0073] In this embodiment, the degreasing agent is 10g of triethanolamine oleic acid soap, 3g of isopropyl alcohol, 7g of sodium silicate, 8g of sodium molybdate, 5g of citric acid and 3g of hydroxyethylidene diphosphonic acid. The preparation method is: mix the raw materials, add 30mL of distilled water and stir evenly to obtain the degreasing agent.

[0074] Comparative Example

[0075] The difference between this comparative example and Example 1 is that no degreasing and descaling treatment is performed, and the production process of the aluminum coin-shaped product is as follows:

[0076] S1. Aluminum sheets are made by stamping aluminum plates;

[0077] S2, CNC machining the aluminum sheet to produce an aluminum disc having a groove on the surface, wherein the size of the aluminum disc is 42 mm×42 mm×4 mm, and the depth of the groove is 0.2 mm;

[0078] S3, the aluminum disc is anodized with electrolyte at a temperature of 20°C, a voltage of 18V, and a current of 1A / dm 2 Under the conditions of , oxidation treatment was carried out for 20 min;

[0079] S4, immersing the oxidized aluminum disc in a dye solution at a temperature of 35°C and a pH of 6 for 10 minutes;

[0080] S5. Use UV printing to obtain the finished product.

[0081] Test results

[0082] The products of the embodiment and the comparative example were selected for wear resistance test, and the test standard was GB12444.1-90 Metal Wear Test Method MM Type Wear Test. The test results are as follows:

[0083] Table 1 Wear resistance test results

[0084]

[0085] According to Table 1, the mass wear values ​​of the products of Examples 1-5 are less than the mass wear values ​​of the products of the comparative example, indicating that the wear resistance of the products can be improved by degreasing and descaling the products.

[0086] In summary, the production process of the aluminum coin-shaped product of the embodiment of the present invention uses aluminum plates or aluminum bars as raw materials to make coin-shaped products, and utilizes the soft characteristics of aluminum material to improve the processing speed of aluminum discs, so as to facilitate faster and better aluminum discs. In addition, the aluminum material is light, so that the obtained aluminum discs are lighter in weight, which is convenient for the transportation and carrying of finished products. The aluminum discs are CNC-processed to produce aluminum discs of different specifications, and then aluminum discs of different sizes are obtained to be suitable for use in different scenes, which is highly practical. The aluminum discs after CNC processing are then degreased and descaled, so that the compactness of the oxide film formed on the surface of the aluminum disc during the oxidation process can be improved, thereby improving the wear resistance and corrosion resistance of the aluminum disc. Then the oxidized aluminum discs are directly dyed, so that it is easier for the dye solution to infiltrate the oxide film layer, improve the color fastness, and obtain aluminum discs of different colors to meet people's different requirements for color. Then printing is performed, and different patterns or marks can be printed on the surface of the aluminum disc so that the aluminum disc is suitable for different fields. By using aluminum as raw material, through CNC processing, oxidation, dyeing and printing, we can obtain aluminum coin-shaped products with good texture, high strength, metallic luster, good wear resistance and light weight, which is convenient for expanding the use of aluminum products.

[0087] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A production process for aluminum coin-shaped products, characterized in that: The following steps are involved: Aluminum sheets are made by stamping aluminum sheets or slicing aluminum bars; The aluminum sheets are processed by CNC into aluminum discs of different sizes, and then oxidized, dyed, and printed to obtain the finished products; The oxidation process is as follows: firstly, the aluminum disc is degreased and descaled, and then oxidized with an anodic oxidation electrolyte.

2. The production process of aluminum coin-shaped products according to claim 1, characterized in that: The thickness of the aluminum disc is 3-4 mm and the diameter is 35-45 mm.

3. The production process of aluminum coin-shaped products according to claim 1, characterized in that: After the aluminum sheet is processed by CNC machining and before oxidation, at least one groove is punched or hydraulically pressed on the surface of the aluminum sheet. The punching or hydraulic pressure is 60-120 tons, the depth of the groove is 0.1-0.2 mm, and polishing is performed after punching or hydraulic pressing.

4. The production process of aluminum coin-shaped products according to claim 1, characterized in that: The degreasing and descaling process is as follows: soak the aluminum disc in a degreasing agent at 60-80°C for 20-40 minutes, then rinse with hot water, soak in alkaline solution for 30-50 minutes, pickle with sulfuric acid for 3-5 seconds, and finally rinse with clean water.

5. The production process of aluminum coin-shaped products according to claim 4, characterized in that: The degreasing agent comprises, by weight, 1-10 parts of triethanolamine oleic acid soap, 1-3 parts of isopropyl alcohol, 2-7 parts of sodium silicate, 3-8 parts of sodium molybdate, 1-5 parts of citric acid and 1-3 parts of hydroxyethylidene diphosphonic acid.

6. The production process of aluminum coin-shaped products according to claim 1, characterized in that: During oxidation treatment, the temperature is 20-25°C, the voltage is 18-22V, and the current is 1-2A / dm 2 Under the conditions of , oxidation treatment is carried out for 20-28 minutes.

7. The production process of aluminum coin-shaped products according to claim 1, characterized in that: The dyeing process is as follows: the oxidized aluminum disc is immersed in a dye solution with a temperature of 35-45° C. and a pH of 6-6.5 for 10-20 minutes.

8. The production process of aluminum coin-shaped products according to claim 1, characterized in that: Printing is UV printing, screen printing, heat transfer or laser engraving.

9. An aluminum coin-shaped product produced by the production process of aluminum coin-shaped products according to any one of claims 1 to 8.

10. Use of the aluminum coin-shaped product according to claim 9 in entertainment, promotional and advertising products.

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