Manufacturing process of a 0.5N gold surface decorative film for bag fasteners

Abstract

This application relates to the field of jewelry processing, specifically disclosing a manufacturing process for a 0.5N gold surface decorative film on bag fasteners. The process involves cleaning and drying the bag fasteners, then placing them into a vacuum coating machine. Following steps such as coarse low-vacuum extraction, fine high-vacuum extraction, argon ion cleaning, titanium ion cleaning, titanium plating, gold plating, gold plating with steel, nickel, and copper, and cooling, a uniform thickness, corrosion-resistant, wear-resistant, and oxidation-resistant surface decorative film is obtained for the bag fasteners. The color tone is L87, A2.2, B14.6, named 0.5N gold, adding a precious metal gold color to the market and filling a market gap, providing a new option for jewelry manufacturers. Furthermore, the simple and efficient production process helps improve production efficiency. Moreover, during the production process, the color tone of the surface decorative film on the bag fasteners can be adjusted by changing the current of the gold, steel, nickel, and copper targets in the vacuum coating machine.

Description

Technical Field

[0001] This application relates to the field of jewelry processing, and more specifically, it relates to a manufacturing process for a 0.5N gold surface decorative film on a bag buckle. Background Technology

[0002] Stainless steel is commonly used for bag and luggage fasteners. To match the appearance of the bags, a gold-plated finish is often used on the surface of these fasteners. In the market, gold-plated stainless steel bag and luggage fasteners are commonly found in gold and rose gold series. The gold series includes 1N, 2N, and 3N, while the rose gold series includes 4N and 5N.

[0003] The raw materials for gold plating, namely gold target materials, are mostly synthetic gold materials, such as synthetic gold materials with added nickel and silver. The raw materials for rose gold plating are mostly synthetic gold materials with added copper.

[0004] However, the cost of the gold target material for synthetic gold is high. Besides the time and labor costs associated with manufacturing precision, there are also purification losses due to repeated adjustments of the formula. Therefore, successfully adjusting the synthetic gold formula is costly, which in turn increases the cost of producing the gold plating. Furthermore, the range of gold colors is not yet rich enough, necessitating the development of more gold surface decorative films. Summary of the Invention

[0005] In order to reduce the manufacturing cost of surface decorative film for bag fasteners and to develop more gold-colored surface decorative films, this application provides a manufacturing process for 0.5N gold surface decorative film for bag fasteners.

[0006] The manufacturing process of a 0.5N gold surface decorative film for a bag fastener provided in this application adopts the following technical solution: The manufacturing process of a 0.5N gold surface decorative film for a bag fastener includes the following steps:

[0007] Cleaning and drying of luggage fasteners: Laser cleaning of luggage fasteners is carried out with a laser current of 20-30A and a vibration frequency of 80-120Hz. After laser cleaning, the luggage fasteners are washed with water and then dried.

[0008] Install bag and luggage fasteners: Install bag and luggage fasteners into the vacuum coating machine;

[0009] Coarse vacuuming with low vacuum: The coarse vacuuming time of the vacuum coating machine is 10-15 minutes, and the vacuum degree reaches 4.5-5.5 Pa;

[0010] High vacuum extraction: The vacuum coating machine performs high vacuum extraction, and heating and baking are carried out simultaneously to achieve a vacuum degree of 0.005-0.008 Pa; Argon ion cleaning: Argon flow rate is 400-500 sccm, vacuum degree is 1-2 Pa, bias voltage is 400-600 V, and time is 10-15 minutes; Titanium ion cleaning: Argon flow rate is 30-60 sccm, vacuum degree is 0.06-0.1 Pa, bias voltage is 400-600 V, titanium arc current is 50-70 A, and time is 1-2 minutes;

[0011] Titanium plating: Argon gas flow rate 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 100-200 V, titanium column target current 20-30 A, time 3-5 minutes;

[0012] Gold plating: Argon gas flow rate 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 80-120 V, gold column target current 5-6 A, time 3-5 minutes;

[0013] Gold plating with steel, nickel, and copper: Argon flow rate 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 80-120 V, gold target current 5-8 A, steel target current 1-2 A, nickel target current 1-2 A, copper target current 0.1-2 A, time 30-60 minutes.

[0014] Cooling: The luggage fasteners are cooled in the furnace until they reach room temperature.

[0015] By adopting the above technical solution, laser cleaning of luggage fasteners effectively removes the oxide layer and contaminants such as grease adhering to the surface of the fasteners during processing. Furthermore, laser cleaning is a non-contact process, minimizing adverse effects on delicate parts of the fasteners. Its high cleaning efficiency improves production efficiency. Following laser cleaning with water washing and drying helps remove minute impurities adsorbed on the fastener surface due to static electricity; water washing is more effective than blowing in removing these impurities. The two-step process of coarse low-vacuum and fine high-vacuum cleaning to achieve the required vacuum level helps maintain the vacuum coating machine and improves vacuum adjustment accuracy. Heating and baking accelerate the release of residual gases in the vacuum coating machine and also helps release gases from the luggage fasteners, reducing the likelihood of fasteners slipping or wrinkling after prolonged use. Argon ion cleaning does not cause oxidation on the surface of luggage fasteners. Furthermore, argon ions can further clean stubborn impurities and improve the surface roughness, which is beneficial for a tighter bond between the fasteners and the decorative film. Titanium ion cleaning facilitates the deposition of titanium ions on the surface of the fasteners in the subsequent titanium plating step. Titanium has good affinity with other metal ions such as iron, gold, copper, and nickel, as well as carbon. Therefore, the titanium plating step is beneficial for forming a tightly bonded titanium layer on the surface of stainless steel luggage fasteners, and also facilitates the deposition of other metal ions on the surface. Moreover, the titanium plating step helps to form a silvery-white base color on the surface of the luggage fasteners, which in turn facilitates the formation of the desired gold color in subsequent steps. Gold plating facilitates the formation of a golden base color. The gold plating process, which involves mixing steel, nickel, and copper, uses a combination of various elements to achieve the ideal hue of precious metals. During the cooling process, the luggage fasteners are cooled in the furnace, reducing the possibility of oxidation and discoloration due to the high temperature of the fasteners reacting with air. After the bag fasteners are placed into a vacuum coating machine, they undergo several steps including coarse low-vacuum extraction, fine high-vacuum extraction, argon ion cleaning, titanium ion cleaning, titanium plating, gold plating, gold plating with steel, nickel, and copper, and cooling. This process yields a decorative film on the bag fastener surface that is uniform in thickness, corrosion-resistant, wear-resistant, and oxidation-resistant. The color tones are L87, A2.2, and B14.6, named 0.5N gold. This adds a precious metal gold color to the market, filling a market gap and providing jewelry manufacturers with a new option. Furthermore, the simple and efficient production process helps improve production efficiency.

[0016] Optionally, in the steps of cleaning and drying the luggage fasteners, the laser cleaning amplitude is 45-55 mm and the linear velocity is 18-22 mm / s. -1 .

[0017] Experiments showed that during the cleaning and drying of luggage fasteners, when the laser current was 20-30A and the vibration frequency was 80-120Hz, the laser cleaning amplitude was 45-55 mm and the linear velocity was 18-22 mm / s. -1Laser cleaning of luggage fasteners yields the best results, and the final surface decorative film exhibits excellent wear resistance.

[0018] Optionally, in the step of cleaning and drying the bag fasteners, the drying temperature is 80-200℃ and the drying time is 30-60 minutes.

[0019] By adopting the above technical solution, a drying temperature of 80-200℃ and a drying time of 30-60 minutes are conducive to completely drying the moisture on the surface of the bag fasteners.

[0020] Optionally, in the high vacuum extraction step, the heating and baking temperature is 150-250 degrees Celsius, and the baking time is 30-60 minutes.

[0021] By adopting the above technical solution, the heating and baking temperature is 150-250 degrees Celsius, the baking time is 30-60 minutes, and the residual gas in the vacuum coating machine and the luggage fasteners is effectively discharged.

[0022] Optionally, in the gold plating step involving steel, nickel, and copper, the target current for the gold column is 6A, the target current for the steel column is 1.2A, the target current for the nickel column is 1.5A, and the target current for the copper column is 0.3A.

[0023] Experiments have shown that in the gold plating process involving steel, nickel, and copper, when the target current for the gold column is 6A, the target current for the steel column is 1.2A, the target current for the nickel column is 1.5A, and the target current for the copper column is 0.3A, the surface decorative film of the resulting bag buckle has an ideal color tone of precious metals, good gloss, uniform thickness, and good corrosion resistance and wear resistance. The color tone is L87, A2.2, B14.6, named 0.5N gold. This adds a precious metal gold color that meets market demand, fills a market gap, and provides a new option for jewelry manufacturers.

[0024] Optionally, in the titanium plating step, the thickness of the titanium plating layer is 0.1-0.3 micrometers.

[0025] By adopting the above technical solution, in the titanium plating process, the thickness of the titanium plating layer is 0.1-0.3 micrometers, and the surface decorative film of the bag fastener has good wear resistance.

[0026] Optionally, in the gold plating step, the thickness of the gold plating layer is 0.1-0.5 micrometers.

[0027] By adopting the above technical solution, in the gold plating step, the thickness of the gold plating layer is 0.1-0.5 micrometers, the surface decorative film of the bag buckle has good corrosion resistance, and the color of the surface decorative film is the ideal color of precious metal with good gloss.

[0028] Optionally, in the gold plating step involving nickel and copper in steel, nitrogen gas is also introduced at a rate of 50-100 sccm.

[0029] Experiments have shown that during the gold plating process involving nickel and copper in steel, introducing nitrogen gas at a rate of 50-100 sccm improves the corrosion resistance and wear resistance of the decorative film on the surface of the luggage fasteners. This is likely because nitrogen ionizes into nitrogen ions, which can combine with metal ions in the steel, such as titanium and cadmium, thus forming a denser decorative film.

[0030] Optionally, the vacuum coating machine includes a body with an internal cavity. The vacuum coating machine also includes a vacuum pumping device to create a vacuum environment in the cavity, a heater for heating, a gas delivery device for delivering working gas into the cavity, an ion generator, and a bias power supply. The heater is insulated from the cavity. A mounting ring is rotatably disposed within the cavity, and several workpiece holders for placing bag fasteners are rotatably disposed on the mounting ring. An anode column is installed at the center of the mounting ring in the cavity. Four magnetron sputtering sources are disposed within the cavity, with magnetron sputtering sources positioned on the outer sides of the four magnetron sputtering sources. DC targets are all connected to a DC drive power supply and are evenly distributed around the outer side of the mounting ring. The four DC targets are gold, steel, nickel, and copper targets, respectively. A titanium target is also disposed within the cavity, with a magnetron sputtering source positioned on the inner side of the titanium target.

[0031] By adopting the above technical solutions, the vacuum pumping device can perform vacuuming, the heater can heat and bake, and the gas delivery device can deliver gases such as argon and nitrogen. The ion generator can obtain the required ions, and the bias power supply can control the bias conditions. The stainless steel bag fastener is placed on the workpiece holder, which can rotate (i.e., rotate on its own axis), and the mounting ring can also rotate, i.e., the mounting ring can drive the workpiece holder to revolve. The anode column, magnetron sputtering source, and DC target work together to perform simultaneous magnetron sputtering of gold, steel, nickel, and copper to produce a surface decorative film on the stainless steel bag fastener.

[0032] Optionally, the workpiece rack includes a vertical rod rotatably mounted on a mounting ring, a plurality of support discs sleeved on the vertical rod, and a plurality of hooks detachably mounted on the support discs.

[0033] By adopting the above technical solution, bag fasteners can be placed on several hooks or support plates. Several support plates are set on the uprights, and several hooks are set on the support plates. This is suitable for batch processing of bag fasteners and improves the efficiency of producing surface decorative film for bag fasteners.

[0034] In summary, this application has the following beneficial effects:

[0035] 1. This application, by placing the bag fasteners into a vacuum coating machine and subjecting them to steps such as coarse low-vacuum coating, fine high-vacuum coating, argon ion cleaning, titanium ion cleaning, titanium plating, gold plating, gold plating with steel, nickel, and copper, and cooling, yields a uniform, corrosion-resistant, and wear-resistant decorative film on the surface of the bag fasteners. The film's color is L87, A2.2, B14.6, named 0.5N gold, adding a precious metal gold color to the market and filling a market gap, providing a new option for jewelry manufacturers. Furthermore, the simple and efficient production process helps improve production efficiency.

[0036] 2. In the gold plating process involving steel, nickel, and copper, it is preferable to use a gold target current of 6-8A, a steel target current of 1-1.5A, a nickel target current of 1-1.5A, and a copper target current of 0.3-0.5A. The resulting decorative film on the surface of the bag fastener has an ideal color tone of precious metals, good gloss, uniform thickness, and good corrosion resistance and wear resistance.

[0037] 3. In the vacuum coating machine used in this application, the anode column, magnetron sputtering source, and DC target are used together to perform simultaneous magnetron sputtering of gold, steel, nickel, and copper to produce a surface decorative film for stainless steel luggage fasteners. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the vacuum coating machine in this application;

[0039] Figure 2 yes Figure 1 A schematic diagram of the structure of the vacuum coating machine's display chamber;

[0040] Figure 3 yes Figure 2 A top view of the concealed vacuum coating machine.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Vacuum coating machine; 11. Chamber; 12. Mounting ring; 2. DC target; 21. Gold target; 22. Steel target; 23. Nickel target; 24. Copper target; 3. Titanium target; 4. Anode column; 5. Workpiece holder; 51. Column; 52. Support plate; 53. Hook. Detailed Implementation

[0043] The following provides a further detailed description of this application.

[0044] Example

[0045] Example 1

[0046] A manufacturing process for a 0.5N gold surface decorative film on a bag fastener includes the following steps:

[0047] Cleaning and drying of bag and luggage fasteners: Stainless steel bag and luggage fasteners are cleaned by laser with a laser current of 30A, a vibration frequency of 80Hz, an amplitude of 55mm, and a linear velocity of 18 / mm·s-1. After laser cleaning, the bag and luggage fasteners are washed with water and then dried at a temperature of 200℃ for 30 minutes.

[0048] Install bag and luggage fasteners: Install the bag and luggage fasteners into the workpiece rack 5 of the cavity 11 of the vacuum coating machine 1;

[0049] Coarse vacuuming with low vacuum: The coarse vacuuming time of vacuum coating machine 1 is 15 minutes, and the vacuum degree reaches 4.5 Pa;

[0050] High vacuum extraction: The vacuum coating machine performs high vacuum extraction. At the same time, it heats and bakes the coating. The vacuum degree reaches 0.008Pa. The heating and baking temperature is 150 degrees Celsius and the baking time is 60 minutes.

[0051] Argon ion cleaning: Argon flow rate 400 sccm, vacuum degree 2 Pa, bias voltage 400 V, time 15 minutes;

[0052] Titanium ion cleaning: Argon flow rate 30 sccm, vacuum degree 0.1 Pa, bias voltage 400 V, titanium arc current 70 A, time 1 minute;

[0053] Titanium plating: Argon gas flow rate 200 sccm, vacuum degree 0.3 Pa, bias voltage 200 V, titanium target 3, current 20 A, time 5 minutes, the thickness of the titanium plating layer is 0.1 micrometers;

[0054] Gold plating: Argon flow rate 200 sccm, vacuum degree 0.3 Pa, bias voltage 120 V, gold target 21, current 5 A, time 5 minutes, the thickness of the gold plating layer is 0.1 micrometers;

[0055] Gold-plated steel-nickel-copper: Argon flow rate 200 sccm, vacuum degree 0.3 Pa, bias voltage 120 V, gold target 21 current 5 A, steel target 22 current 2 A, nickel target 23 current 1 A, copper target 24 current 2 A, time 30 minutes.

[0056] Cooling: The luggage fasteners are cooled in the furnace until they reach room temperature.

[0057] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0058] refer to Figure 1The aforementioned vacuum coating machine 1 includes a body with an internal cavity 11. The vacuum coating machine 1 also includes a vacuum pumping device for creating a vacuum environment in the cavity 11, a heater for heating, a gas delivery device for delivering working gas into the cavity 11, an ion generator, and a bias power supply. The heater is insulated from the cavity 11. (Reference) Figure 2 A mounting ring 12 is rotatably mounted in the cavity 11. Several workpiece holders 5 for placing bag fasteners are rotatably mounted on the mounting ring 12. An anode column 4 is mounted at the center of the mounting ring 12 in the cavity 11. Four magnetron sputtering sources are installed in the cavity 11. (Reference) Figure 3 Four magnetron sputtering sources are each equipped with a DC target 2 on their outer side. The DC targets 2 are evenly distributed around the outer side of the mounting ring 12. The four DC targets 2 are gold target 21, steel target 22, nickel target 23, and copper target 24, respectively. Each DC target 2 is connected to a DC drive power supply with a range of 10A and an accuracy requirement of 0.1A adjustment. A titanium target 3 is also installed in the cavity 11, and a magnetron sputtering source is installed on the inner side of the titanium target 3. The workpiece holder 5 includes a vertical rod rotatably mounted on the mounting ring 12, several support plates 52 sleeved on the vertical rod, and several hooks 53 detachably mounted on the support plates 52. In this embodiment, there are six vertical rods. Each vertical rod has seven support plates 52, and each support plate 52 has six hooks 53.

[0059] Example 2

[0060] Example 2 uses the same vacuum coating machine as Example 1.

[0061] A manufacturing process for a 0.5N gold surface decorative film on a bag fastener includes the following steps:

[0062] Cleaning and drying of luggage fasteners: Stainless steel luggage fasteners are cleaned using laser technology with a laser current of 20A, a vibration frequency of 120Hz, an amplitude of 45mm, and a linear velocity of 22 / mm·s. -1 Then, the laser-cleaned bag buckles are washed with water and dried at 80℃ for 60 minutes.

[0063] Install bag and luggage fasteners: Install the bag and luggage fasteners into the workpiece rack of the vacuum coating machine cavity;

[0064] Coarse vacuuming with low vacuum: The coarse vacuuming time of the vacuum coating machine is 10 minutes, and the vacuum degree reaches 5.5 Pa;

[0065] High vacuum extraction: The vacuum coating machine performs high vacuum extraction. At the same time, it heats and bakes the coating. The vacuum degree reaches 0.005Pa, the heating and baking temperature is 250 degrees Celsius, and the baking time is 30 minutes.

[0066] Argon ion cleaning: Argon flow rate 500 sccm, vacuum degree 1 Pa, bias voltage 600 V, time 10 minutes;

[0067] Titanium ion cleaning: Argon flow rate 60 sccm, vacuum degree 0.06 Pa, bias voltage 600 V, titanium arc current 50 A, time 2 minutes;

[0068] Titanium plating: Argon gas flow rate 100 sccm, vacuum degree 0.5 Pa, bias voltage 100 V, titanium target current 30 A, time 3 minutes, the thickness of the titanium plating layer is 0.3 micrometers;

[0069] Gold plating: Argon gas flow rate 100 sccm, vacuum degree 0.5 Pa, bias voltage 80 V, gold column target current 6 A, time 3 minutes, the thickness of the gold plating layer is 0.5 micrometers;

[0070] Gold plating with steel, nickel, and copper: argon gas flow rate 100 sccm, vacuum degree 0.5 Pa, bias voltage 80 V, gold target current 8 A, steel target current 1 A, nickel target current 2 A, copper target current 0.1 A, time 60 minutes.

[0071] Cooling: The luggage fasteners are cooled in the furnace until they reach room temperature.

[0072] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0073] Example 3

[0074] Example 3 uses the same vacuum coating machine as Example 1.

[0075] A manufacturing process for a 0.5N gold surface decorative film on a bag fastener includes the following steps:

[0076] Cleaning and drying of luggage fasteners: Stainless steel luggage fasteners are cleaned using laser technology with a laser current of 25A, a vibration frequency of 100Hz, an amplitude of 50mm, and a linear velocity of 20 / mm·s. -1 Then, the laser-cleaned bag buckles are washed with water and dried at a temperature of 140℃ for 45 minutes.

[0077] Install bag and luggage fasteners: Install the bag and luggage fasteners into the workpiece rack of the vacuum coating machine cavity;

[0078] Coarse vacuuming with low vacuum: The coarse vacuuming time of the vacuum coating machine is 12.5 minutes, and the vacuum degree reaches 5Pa;

[0079] High vacuum extraction: The vacuum coating machine performs high vacuum extraction. At the same time, it is heated and baked, with the vacuum degree reaching 0.006Pa. The heating and baking temperature is 200 degrees and the baking time is 40 minutes.

[0080] Argon ion cleaning: argon flow rate 450 sccm, vacuum degree 1.5 Pa, bias voltage 500 V, time 12.5 minutes; Titanium ion cleaning: argon flow rate 45 sccm, vacuum degree 0.08 Pa, bias voltage 500 V, titanium arc current 60 A, time 1.5 minutes; Titanium plating: argon flow rate 150 sccm, vacuum degree 0.4 Pa, bias voltage 150 V, titanium target current 25 A, time 4 minutes, the thickness of the titanium plating layer is 0.2 micrometers;

[0081] Gold plating: Argon gas flow rate 150 sccm, vacuum degree 0.4 Pa, bias voltage 100 V, gold column target current 5.5 A, time 4 minutes, the thickness of the gold plating layer is 0.3 micrometers;

[0082] Gold-plated steel-nickel-copper alloy: argon gas flow rate 150 sccm, vacuum degree 0.4 Pa, bias voltage 100 V, gold target current 6 A, steel target current 1.5 A, nickel target current 1.5 A, copper target current 1 A, time 45 minutes.

[0083] Cooling: The luggage fasteners are cooled in the furnace until they reach room temperature.

[0084] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0085] Example 4

[0086] Example 4 uses the same vacuum coating machine as Example 3.

[0087] The difference between Example 4 and Example 3 is that in the gold plating process of the 0.5N gold surface decorative film of a bag buckle, the target current of the gold column is 6A, the target current of the steel column is 1.2A, the target current of the nickel column is 1.5A, and the target current of the copper column is 0.3A.

[0088] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0089] Example 5

[0090] Example 5 uses the same vacuum coating machine as Example 3.

[0091] The difference between Example 5 and Example 3 is that in the gold plating process of the 0.5N gold surface decorative film manufacturing process of a bag buckle, the target current of the gold column is 6A, the target current of the steel column is 1.0A, the target current of the nickel column is 1.2A, and the target current of the copper column is 1.0A.

[0092] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0093] Example 6

[0094] Example 6 uses the same vacuum coating machine as Example 3.

[0095] The difference between Example 6 and Example 3 is that in the gold plating process of the 0.5N gold surface decorative film for a bag buckle, the target current for the gold column is 6A, the target current for the steel column is 0.4A, the target current for the nickel column is 0A, and the target current for the copper column is 1.3A.

[0096] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0097] Example 7

[0098] Example 7 uses the same vacuum coating machine as Example 4.

[0099] The difference between Example 7 and Example 4 is that in the gold plating step of the manufacturing process of a 0.5N gold surface decorative film for a bag buckle, nitrogen gas is also introduced, with a nitrogen gas volume of 50 sccm.

[0100] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0101] Example 8

[0102] Example 8 uses the same vacuum coating machine as Example 4.

[0103] The difference between Example 8 and Example 4 is that in the gold plating step of the manufacturing process of a 0.5N gold surface decorative film for a bag buckle, nitrogen gas is also introduced, with a nitrogen gas volume of 100 sccm.

[0104] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0105] Example 9

[0106] Example 9 uses the same vacuum coating machine as Example 4.

[0107] The difference between Example 9 and Example 4 is that in the gold plating step of the manufacturing process of a 0.5N gold surface decorative film for a bag buckle, nitrogen gas is also introduced, with a nitrogen gas volume of 75 sccm.

[0108] By using the above-mentioned manufacturing process of 0.5N gold surface decorative film for bag buckles, stainless steel bag buckles are made to have a 0.5N gold surface decorative film.

[0109] Comparative Example

[0110] Comparative Example 1

[0111] Commercially available stainless steel fasteners with a metallic decorative coating on the surface.

[0112] Performance testing

[0113] The stainless steel bag fasteners with 0.5N gold surface decorative film prepared in Examples 1-9 and the stainless steel fasteners with metal decorative film on the surface of commercially available products in Comparative Example 1 were tested for color tone, film thickness uniformity, corrosion resistance and wear resistance.

[0114] Color tone detection was performed using a colorimeter.

[0115] Film thickness uniformity is tested at multiple locations of bag fasteners according to ISO2178-2016. Film thickness uniformity is judged based on the deviation between the maximum and minimum thickness.

[0116] The corrosion resistance shall be evaluated in accordance with the neutral salt spray test (NSS) method of QB / T3826-1999 for corrosion resistance test of metal coatings and chemical treatment layers of light industrial products, and with reference to the corrosion test results of metal coatings of light industrial products in QB / T3832-1999.

[0117] Abrasion resistance is tested according to QB / T3821-1999 Test Method for Bond Strength of Metal Coatings in Light Industrial Products.

[0118] Test results: See the table below:

[0119] Table 1. Color Tone Detection Results

[0120]

[0121] Comparing Examples 1-9 with Comparative Example 1, the maximum and minimum thickness deviations of Examples 1-9 are all smaller than those of Comparative Example 1, indicating that the uniformity of the film thickness of the stainless steel bag fasteners produced by the manufacturing process of this application is significantly better than that of commercially available stainless steel fasteners with a metal decorative film coating. The corrosion resistance level of Examples 1-9 is 2 or 3 (very corrosion resistant), while the corrosion resistance level of the comparative example is 5, indicating that the manufacturing process of this application is beneficial to improving the corrosion resistance of the surface decorative layer of the stainless steel bag fasteners. The bonding strength of Examples 1-9 is better than that of Comparative Example 1, indicating that the manufacturing process of this application is beneficial to improving the wear resistance of the surface decorative layer of the stainless steel bag fasteners. Furthermore, the bonding strength of Examples 6-9 is better than that of Examples 1-6, indicating that the introduction of nitrogen gas is beneficial to further improving the wear resistance of the surface decorative layer of the stainless steel bag fasteners.

[0122] The color tone detection results of Examples 4 and 7-9 are L87, A2.2, B14.6, named 0.5N gold, adding a precious metal gold color to the market, filling a market gap, and providing a new option for jewelry manufacturers. The color tone of Example 5 is L87.5, A3.5, B26.5, which is 1N gold already available on the market. The color tone of Example 6 is L86, A10.5, B20.5, which is 5N gold already available on the market. During the production process, the color tone of the surface decorative film of the bag buckle can be adjusted by adjusting the current of the gold column target, steel column target, nickel column target, and copper column target. Steel and nickel can be added to gold alone or simultaneously. The more gold added, the lighter the gold color. Both steel and nickel can reduce the A and B values. The difference is: when reducing the same B value, steel reduces the L value more and the A value less; nickel reduces the L value less and the A value more. Adding copper increases the A value and decreases the B value, adjusting the overall gold color to lean towards a reddish hue. Simultaneously adding copper, steel, and nickel allows for easy adjustment via current, with fine-tuning precision down to 0.1A, achieving the ideal light gold tone sought after in jewelry.

[0123] The above specific embodiments are merely explanations of this application and are not intended to limit this application. After reading this specification, those skilled in the art can make modifications to this application without contributing any inventive step, but all such modifications should be covered within the protection scope of this application.

Claims

1. A manufacturing process for a 0.5N gold surface decorative film on bag fasteners, characterized in that, It includes the following steps: Cleaning and drying of luggage fasteners: Laser cleaning of luggage fasteners is performed using a laser current of 20-30A and a vibration frequency of 80-120Hz. The laser cleaning amplitude is 45-55 mm and the linear velocity is 18-22 mm·s. -1 Then, the laser-cleaned bag fasteners are washed with water and dried; the drying temperature is 80-200℃ and the drying time is 30-60 minutes. Install bag fasteners: Install bag fasteners into the vacuum coating machine (1); The vacuum coating machine (1) includes a body with a cavity (11) inside. The vacuum coating machine (1) also includes a vacuum pumping device to create a vacuum environment in the cavity (11), a heater for heating, a gas delivery device for delivering working gas to the cavity (11), an ion generator, and a bias power supply. The heater is insulated from the cavity (11). A mounting ring (12) is rotatably disposed in the cavity (11). Several workpiece racks (5) for placing bag fasteners are rotatably disposed on the mounting ring (12). The cavity (11) is located in a safe location. An anode column (4) is installed at the center of the mounting ring (12). Four magnetron sputtering sources are provided in the cavity (11). A DC target (2) is provided on the outside of the four magnetron sputtering sources. The DC targets (2) are all connected to a DC drive power supply. The DC targets (2) are evenly distributed around the outside of the mounting ring (12). The four DC targets (2) are gold target (21), steel target (22), nickel target (23), and copper target (24). A titanium target (3) is also provided in the cavity (11). A magnetron sputtering source is provided on the inside of the titanium target (3). Coarse vacuuming: The vacuum coating machine (1) performs coarse vacuuming for 10-15 minutes, achieving a vacuum level of 4.5-5.5 Pa; High vacuum: Vacuum coating machine (1) High vacuum is drawn, and at the same time, it is heated and baked. The vacuum degree reaches 0.005-0.008Pa. The heating and baking temperature is 150-250 degrees and the baking time is 30-60 minutes. Argon ion cleaning: Argon flow rate 400-500 sccm, vacuum degree 1-2 Pa, bias voltage 400-600 V, time 10-15 minutes; Titanium ion cleaning: Argon flow rate 30-60 sccm, vacuum degree 0.06-0.1 Pa, bias voltage 400-600 V, titanium arc current 50-70 A, time 1-2 minutes; Titanium plating: Argon gas flow rate 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 100-200 V, titanium target (3) current 20-30 A, time 3-5 minutes; Gold plating: Argon gas volume 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 80-120 V, gold column target (21) current 5-6 A, time 3-5 minutes; Gold plating with steel-nickel-copper alloy: Argon gas flow rate 100-200 sccm, vacuum degree 0.3-0.5 Pa, bias voltage 80-120 V, gold target (21) current 6 A, steel target (22) current 1.2 A, nickel target (23) current 1.5 A, copper target (24) current 0.3 A, time 30-60 minutes; in the gold plating with steel-nickel-copper alloy step, nitrogen gas is also introduced, nitrogen gas flow rate 50-100 sccm; Cooling: The luggage fasteners are cooled in the furnace until they reach room temperature; The 0.5N has hues of L87, A2.2, and B14.

6.

2. The manufacturing process of the 0.5N gold surface decorative film for a bag fastener according to claim 1, characterized in that: In the titanium plating step, the thickness of the titanium plating layer is 0.1-0.3 micrometers.

3. The manufacturing process of the 0.5N gold surface decorative film for a bag fastener according to claim 1, characterized in that: In the gold plating step, the thickness of the gold plating layer is 0.1-0.5 micrometers.

4. The manufacturing process of the 0.5N gold surface decorative film for a bag fastener according to claim 1, characterized in that: The workpiece rack (5) includes a vertical rod rotatably mounted on the mounting ring (12), several support plates (52) sleeved on the vertical rod, and several hooks (53) detachably mounted on the support plates (52).

Images