Process of luminous key with metal texture characters

Abstract

The invention provides a process of a luminous key with metal texture characters, a metal layer on the surface of a part is formed by cutting a metal plate, and the characters are subjected to a laser engraving process, refilled with a resin light-transmitting material and then subjected to insert injection molding. According to the method, the true appearance effects of metal texture and luminous characters are achieved, compared with a traditional process, the method is more delicate, the problem that light transmission of a metal material in a traditional thought cannot be achieved is solved, and the appearance effects of metal texture and luminous characters are achieved. According to the invention, the appearance effects of metal texture and luminous characters are realized, and in order to improve the delicate sense of vehicle interior decoration, the technology is very likely to become a future trend; through the processes of metal plate cutting, character laser engraving and resin light-transmitting material backfilling, the key not only has real metal texture, but also can achieve the effect of character luminescence. The traditional metal texture and the modern technology are combined, and the appearance texture and attractiveness of the product are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical fields of automobile interior decoration, metal buttons and character luminescence, and in particular to a process for a metal texture character luminous button. Background Art

[0002] In the current design and manufacturing of automobile interiors, metal buttons have become widely used components. The Chinese invention patent application number: CN200710182077.5 proposes a metal button, which includes a button material and a pattern or text located on the button material, wherein the button material is formed by metal powder through powder metallurgy, and the Rockwell hardness of the button material is HRC20-40. Since the present invention adopts metal powder metallurgy to prepare the button, the prepared button has a metallic texture and is wear-resistant. In addition, since the metal button provided by the present invention does not require a metal plating step, the preparation process is simple.

[0003] However, the existing metal buttons have some shortcomings in use. In the current automotive interior design and manufacturing, injection molding is generally used in combination with laser engraving characters after painting to achieve the appearance of light-transmitting buttons. Some will also use electroplating laser engraving technology to try to imitate the metal effect to enhance the exquisiteness of the product. However, these processes have significant limitations:

[0004] Firstly, although the method of laser engraving characters after painting can achieve a certain degree of light transmittance, the texture is far from that of real metal and cannot give people a real metal touch and visual experience.

[0005] Secondly, the electroplating laser engraving process is used to imitate the metal effect. Although it is similar in appearance, it still cannot completely restore the unique texture, gloss and texture of the metal, and cannot truly meet consumers' pursuit of high-end quality and strong metal texture of car interiors.

[0006] Third, traditional buttons often use a single material or simple process, which makes it difficult to achieve a high-quality metal appearance and aesthetics. In a dark environment, the operation instructions of traditional buttons are not obvious, and it is difficult for users to accurately find the buttons for the required operations. This reduces the usability and user experience of the product and increases the risk of misoperation. The materials and processes used in traditional buttons are not strong and durable enough, and are easily affected by wear, corrosion, etc., resulting in a shortened service life. This not only increases maintenance costs, but may also affect the overall performance and stability of the product.

[0007] Therefore, we have made improvements to this and proposed a process for making luminous keys with metallic characters. Summary of the invention

[0008] The purpose of the present invention is to address the problems raised by the existing background technology. In order to achieve the above invention purpose, the present invention provides the following technical solutions: A process for making a metal texture character luminous key, comprising the following steps: S1, cutting a metal sheet: selecting a metal sheet, the metal sheet comprising an aluminum alloy or stainless steel; using a laser cutting or stamping process to cut the metal sheet into the shape and size of a key;

[0009] S2. Laser engraving characters: Place the cut metal sheet on the workbench of the laser engraving equipment, adjust the laser power and engraving speed, and use the laser engraving machine to engrave the required characters on the cut metal sheet;

[0010] S3. Backfilling with resin translucent material: Backfill the engraved characters with resin translucent material. Backfill the resin by injection molding or dripping to ensure that the resin fills the character grooves and keeps the surface flat.

[0011] S4, insert injection molding: put the metal part filled with resin light-transmitting material as an insert into the injection mold; inject plastic material and perform injection molding to combine the metal part with the plastic part to form a complete key structure;

[0012] As a preferred technical solution of the present invention, S1, metal sheet cutting includes the following specific steps:

[0013] S11. The selected metal sheet includes aluminum alloy or stainless steel. Check the quality of the aluminum alloy sheet. The scratch length does not exceed 2mm, the width does not exceed 0.1mm, the depth does not exceed 0.05mm, the pit diameter does not exceed 1mm, the depth does not exceed 0.1mm, and the stain area does not exceed 0.5cm 2 ; No peeling is allowed;

[0014] S12. Fix the plate: Place the aluminum alloy plate steadily on the workbench of the cutting equipment; use a clamp or magnetic device to fix the plate to prevent it from moving during the cutting process;

[0015] S13, cutting: start the cutting equipment, ensure that the cutter is sharp and correctly installed, and slowly perform the cutting operation according to the set size and direction. Pay attention to controlling the cutting speed to avoid cutting too fast, which may cause burrs or deformation on the edge of the sheet;

[0016] S14. Check cutting quality: After cutting is completed, turn off the cutting equipment; remove the cut plate and check whether the size meets the requirements, whether the edge is neat and smooth, and without obvious burrs or cracks;

[0017] As a preferred technical solution of the present invention, S2, the specific steps of laser engraving characters are:

[0018] S21, placing the metal sheet cut in S1 on the workbench of the laser engraving equipment, and ensuring that the sheet is stably fixed and will not move during the engraving process;

[0019] S22, set engraving parameters: set the laser power to 30W; set the engraving speed to 800mm / s; set the engraving depth to 0.2mm;

[0020] S23, performing engraving: importing the character pattern to be engraved into the device, starting the laser engraving device, and the device will engrave on the metal plate according to the set parameters and the imported pattern;

[0021] S24. Check the engraving quality: After engraving is completed, turn off the laser engraving equipment; carefully check the engraved characters to ensure that the characters are clear and complete, the depth meets the requirements (0.2mm), and the edges are smooth and free of burrs;

[0022] As a preferred technical solution of the present invention, S3, the specific steps of backfilling the resin light-transmitting material are:

[0023] S31. Prepare epoxy resin as a light-transmitting material, place the parts or products that need to be backfilled with the resin light-transmitting material into a preheating device, and perform preheating treatment to improve the backfilling effect; the preheating temperature can be adjusted according to actual conditions, but excessive temperature should be avoided to prevent deformation or damage of the material;

[0024] S32. Set backfill parameters: set the backfill temperature to 120°C; set the backfill pressure to 0.3MPa; place the preheated parts or products into the backfill equipment to ensure that they are positioned correctly and firmly; start the backfill equipment to slowly inject the epoxy resin into the parts that need to be backfilled; during the injection process, pay attention to controlling the injection speed and pressure to ensure that the resin can be evenly filled into each part to avoid gaps or bubbles;

[0025] S33, curing treatment: after the backfilling is completed, the backfilling pressure is kept unchanged, and the parts or products are cured at a temperature of 120°C; the curing time is determined according to the characteristics of the epoxy resin and actual requirements, and the time is 1h-5h;

[0026] S34, cooling and demoulding: after the curing is completed, turn off the heating equipment and let the component or product cool naturally to room temperature; after the component or product cools down, release the backfilling pressure and remove it from the backfilling equipment;

[0027] S35. Perform an appearance inspection on the backfilled parts or products to check for bubbles, cracks, and missing material defects; perform a light transmittance test to ensure that the backfilled resin light-transmitting material meets the required light transmittance and optical properties;

[0028] S36. Clean and sort qualified parts or products to remove residual resin and impurities on the surface; package and store the parts or products for subsequent use or processing;

[0029] As a preferred technical solution of the present invention, S4, insert injection molding:

[0030] S41. Prepare PC (polycarbonate) injection molding materials and ensure that they are dry enough to avoid bubbles or hydrolysis during the injection molding process; check the injection molding machine and mold to ensure that they are operating normally and are clean and free of foreign matter;

[0031] S42, mold preheating: install the mold on the injection molding machine, and set the mold temperature to 80℃ for preheating; the preheating time depends on the size and structure of the mold, and it takes 1-2 hours to ensure that the mold temperature evenly reaches the set value;

[0032] S43, setting injection molding parameters: setting the injection molding temperature to 260°C; setting the injection molding pressure to 80MPa;

[0033] S44, Insert installation: Install the insert accurately to the specified position of the mold, ensuring that the position and direction of the insert are correct;

[0034] S45, injection molding operation: when the mold temperature reaches the set value, add the PC material into the barrel of the injection molding machine; start the injection molding machine, and inject the molten PC material into the mold cavity at a temperature of 260°C and a pressure of 80MPa; during the injection molding process, pay attention to controlling the injection speed and injection volume to ensure that the plastic parts are fully filled and avoid short shots and flash defects;

[0035] S46, pressure holding and cooling: After the injection molding is completed, the injection molding pressure is maintained for 6-13 minutes to compensate for the cooling shrinkage of the plastic part and prevent the plastic part from sinking and dimensional instability. At the same time, the mold cooling system is turned on to cool the plastic part. The cooling time depends on the thickness and material properties of the plastic part and takes tens of seconds to several minutes.

[0036] S47, demoulding: when the plastic part is cooled to a sufficient hardness, the mold is opened and the plastic part is ejected from the mold;

[0037] S48. Perform appearance inspection on injection molded plastic parts to check for defects, including shrinkage, bubbles, cracks, and deformation; perform dimensional measurement to check whether the dimensions of the plastic parts meet the requirements;

[0038] S49. Perform deburring and trimming on qualified plastic parts to improve the appearance quality and dimensional accuracy of the plastic parts; package and store the plastic parts for subsequent assembly or use;

[0039] As a preferred technical solution of the present invention, it also includes S5, surface treatment: polishing treatment is adopted, and the treatment time is 10 minutes to make the metal surface smoother and enhance the metal texture, and adjust the polishing machine parameters: set the speed of the polishing machine; the speed selection should be adjusted according to the type of polishing wheel and the material of the metal workpiece, and is between 1650r / min-2360r / min;

[0040] Adjust the pressure of the polishing machine: The pressure should be adjusted according to the surface condition of the metal workpiece and the polishing requirements to ensure the polishing effect while avoiding excessive wear on the polishing wheel and the workpiece surface;

[0041] As a preferred technical solution of the present invention, it also includes S6, coating protection: using a transparent polyurethane coating with a coating thickness of 0.05 mm to enhance the wear resistance and corrosion resistance of the key;

[0042] S61. Clean the work area to ensure that the environment is clean and tidy, free of dust and debris; prepare the keys to be coated, ensuring that the key surfaces are clean, dry, and free of oil, dust or other contaminants; prepare transparent polyurethane coating materials and coating tools, including spray guns or brushes;

[0043] S62. Prepare coating materials: according to the usage of polyurethane coating materials, mix the main agent and curing agent in the correct proportion; stir the mixed coating materials to make them fully uniform and ensure that there is no precipitation or agglomeration;

[0044] S63. Use a spray gun and adjust the spray shape, spray pressure and paint flow rate of the spray gun to obtain a uniform coating effect;

[0045] S64. Use a spray gun or a brush to evenly apply the prepared transparent polyurethane coating on the surface of the keypad. Control the coating thickness to 0.05mm. This can be achieved by applying thin layers multiple times. After each layer is applied, wait for an appropriate drying time before applying the next layer. During the coating process, avoid dripping, bubbles or missing coating defects.

[0046] S65, Drying and curing: Place the coated buttons in a well-ventilated place and let them dry naturally; according to the requirements of the coating material, control the temperature and humidity of the drying environment to accelerate the drying and curing process of the coating; the drying time is 10h-15h to ensure that the coating is completely cured;

[0047] S66. After the coating is dried and cured, check the coating quality on the key surface; check whether the coating thickness is uniform and meets the requirement of 0.05mm; check whether the coating appearance is smooth, free of bubbles, wrinkles and peeling defects; check the wear resistance and corrosion resistance of the coating, which can be evaluated by conducting simple friction tests and chemical corrosion tests.

[0048] As a preferred technical solution of the present invention, it also includes S7, waterproof treatment: using a nano waterproof agent, by spraying treatment, the treatment time is 5 minutes, so that the key has a certain waterproof performance;

[0049] S71. Ensure that the work area is clean, well-ventilated, and free of dust and debris; place the keys to be waterproofed on the workbench for easy operation; prepare nano waterproofing agent and spraying equipment, including spray guns;

[0050] S72. According to the characteristics of the nano waterproofing agent and the use of the spraying equipment, the spray shape, spray pressure and flow rate of the spray gun are adjusted to ensure that the nano waterproofing agent can be sprayed evenly;

[0051] S73, spray nano waterproof agent: Pick up the spray gun and spray the nano waterproof agent evenly on the surface of the key; pay attention to maintain a certain distance and spraying speed to avoid too thick or uneven coating; spray each key in order from left to right and from top to bottom to ensure that the entire key surface is covered;

[0052] S74, treatment time control: spray continuously for 5 minutes to ensure that the nano waterproof agent can fully penetrate into the surface and tiny pores of the keys to achieve a good waterproof effect;

[0053] S75, Drying: After spraying, place the key in a well-ventilated place and let it dry naturally; drying time 12h-16h;

[0054] S76. After the keys are completely dry, a simple waterproof test can be performed. For example, a small amount of water can be dropped on the key surface to see whether the water can form water droplets on the surface and roll down without penetrating into the key. If it is found that there are keys with unsatisfactory waterproofing effect, they need to be re-sprayed. After the treatment is completed, clean the spraying equipment and work area, and properly store the remaining nano waterproofing agent.

[0055] As a preferred technical solution of the present invention, it also includes S8, color customization: if color needs to be added to the key, an organic dye can be used for dyeing; a blue dye is selected, the dyeing temperature is 80° C., and the dyeing time is 20 minutes;

[0056] S81. Preparation: Clean the work area to ensure that there is no dust and debris; prepare the keys to be dyed, ensuring that the key surface is clean and free of oil and impurities; prepare the selected blue organic dye, dyeing container, heating equipment and stirring tools;

[0057] S81. Prepare dye solution: according to the instructions for use of the dye, mix the blue organic dye with an appropriate amount of water, stir evenly, and prepare a dye solution;

[0058] S82, heating the dye solution: pouring the prepared dye solution into a dyeing container; using a heating device to heat the dye solution to 80° C. and keeping the temperature stable;

[0059] S83, dyeing: placing the prepared key into the heated dye solution; ensuring that the key is completely immersed in the dye solution, and gently stirring with a stirring tool to make the key dyed evenly; keeping the key immersed in the dye solution for 20 minutes to achieve the desired dyeing effect;

[0060] S84. After the dyeing time reaches 20 minutes, use a tool to remove the key from the dye solution; immediately rinse the key with clean water to remove excess dye on the surface;

[0061] S85. Drying keys: Place the cleaned keys in a well-ventilated place to dry naturally, or use drying equipment to dry them to ensure that the keys are completely dry; after the keys are dry, check whether the dyeing effect meets the requirements, including color uniformity and saturation.

[0062] As a preferred technical solution of the present invention, it also includes S9, electromagnetic compatibility test: electromagnetic compatibility test is performed in the frequency range of 100MHz-1GHz, and the test field strength is 3V / m to ensure that the key can work normally in the electromagnetic environment without interfering with other electronic devices;

[0063] S91. Prepare the electromagnetic compatibility test equipment, including the signal generator, power amplifier, antenna, electromagnetic field probe and test receiver; install the key to be tested on the test fixture and connect the relevant power cord and signal cord;

[0064] S92. Set test parameters: Set the frequency range of the signal generator to 100MHz-1GHz and perform frequency scanning in a step-by-step manner; set the output power of the power amplifier so that the test field strength reaches 3V / m; the field strength value can be monitored by the electromagnetic field probe and the test receiver to ensure its accuracy; set the parameters of the test receiver, including measurement bandwidth, detector type and threshold, to meet the test requirements;

[0065] S93. Perform radiation emission test: turn on the signal generator and the power amplifier to generate an electromagnetic radiation signal; use the antenna to transmit the electromagnetic radiation signal into the test space to form a uniform electromagnetic field; place the test fixture with the key installed in the electromagnetic field to ensure that the key is fully radiated by electromagnetic radiation; use the test receiver to measure the radiation emission intensity of the key at different frequencies, and record the test data;

[0066] S94, conduct a conducted emission test: connect the power line and signal line of the key to the conducted emission test equipment; turn on the test equipment, and measure the conducted emission signals of the key on the power line and signal line; also scan within the frequency range of 100 MHz-1 GHz, and record the test data;

[0067] S95. Perform an immunity test: maintain the test field strength at 3V / m and apply electromagnetic interference signals to the buttons;

[0068] Observe the working status of the keys under electromagnetic interference and check whether they work normally, including whether the keys function normally, whether there are any malfunctions or signal loss; record the performance of the keys under electromagnetic interference and any problems that occur;

[0069] S96, Data analysis and evaluation: Analyze the data of radiated emission test, conducted emission test and immunity test; compare the test results with the electromagnetic compatibility standard to evaluate whether the buttons meet the electromagnetic compatibility requirements.

[0070] Compared with the prior art, the present invention has the following beneficial effects:

[0071] The present invention realizes the appearance effect of real metal texture and luminous characters, which is more refined than the traditional process and solves the difficulty that the traditional metal materials cannot achieve light transmission. The present invention realizes the appearance effect of metal texture and luminous characters.

[0072] Through the process of cutting metal sheets, laser engraving characters and backfilling with resin translucent materials, the buttons not only have a real metal texture, but also achieve the effect of luminous characters. This combination of traditional metal texture and modern technology significantly improves the appearance texture and aesthetics of the product.

[0073] In a dark environment, the luminous function of the characters can provide intuitive operating instructions, enhancing the product's recognition and user experience. At the same time, the combination of metal and light-transmitting materials also provides users with a novel visual and tactile experience.

[0074] The use of high-quality metal materials such as aluminum alloy or stainless steel, and strict surface treatment and coating protection ensure that the keys have excellent wear resistance and corrosion resistance. These features improve the durability and reliability of the product and extend its service life.

[0075] Through sophisticated process flow, such as precise cutting of metal sheets, high-precision control of laser engraving and high-efficiency production of injection molding, the production process is optimized and efficiency is improved. This not only ensures the consistency of product quality, but also reduces production costs.

[0076] The process of the present invention supports multiple color customization and special surface treatment, which can meet the personalized needs of different customers. At the same time, by adjusting the process parameters and material selection, buttons of different styles and functions can also be realized, providing customers with more flexible and diverse choices. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 The main process flow chart provided by the present invention;

[0078] Figure 2 Additional process flow chart provided for the present invention

[0079] Figure 3 This is an experimental data diagram provided by the present invention. DETAILED DESCRIPTION

[0080] To make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is a specific implementation of the present invention and is not limited to all embodiments.

[0081] Therefore, the following 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 some 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.

[0082] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0083] Example: See Figure 1-Figure 3 , a process for making a metallic character luminous key, comprising the following steps: S1, cutting of metal sheet: selecting a suitable metal sheet, including aluminum alloy or stainless steel; cutting the metal sheet into a corresponding shape and size according to the size of the key by laser cutting or stamping process;

[0084] S2. Laser engraving characters: Place the cut metal sheet on the workbench of the laser engraving equipment, and use the laser engraving machine to engrave the required characters on the cut metal sheet; adjust the laser power and engraving speed to ensure the clarity and depth of the characters;

[0085] S3. Backfilling with resin translucent material: Backfill the engraved characters with resin translucent material by injection molding or glue dripping to ensure that the resin fills the character grooves and keeps the surface flat;

[0086] S4, insert injection molding: put the metal part filled with resin light-transmitting material as an insert into the injection mold; inject plastic material and perform injection molding to combine the metal part with the plastic part to form a complete key structure;

[0087] S1. Metal sheet cutting includes the following specific steps:

[0088] S11. The selected metal sheet includes aluminum alloy or stainless steel. Check the quality of the aluminum alloy sheet. The scratch length does not exceed 2mm, the width does not exceed 0.1mm, the depth does not exceed 0.05mm, the pit diameter does not exceed 1mm, the depth does not exceed 0.1mm, and the stain area does not exceed 0.5cm 2 ; No peeling is allowed;

[0089] S12. Fix the plate: Place the aluminum alloy plate steadily on the workbench of the cutting equipment; use a clamp or magnetic device to fix the plate to prevent it from moving during the cutting process;

[0090] S13, cutting: start the cutting equipment, ensure that the cutter is sharp and correctly installed, and slowly perform the cutting operation according to the set size and direction. Pay attention to controlling the cutting speed to avoid cutting too fast, which may cause burrs or deformation on the edge of the sheet;

[0091] S14. Check cutting quality: After cutting is completed, turn off the cutting equipment; remove the cut plate and check whether the size meets the requirements, whether the edge is neat and smooth, and without obvious burrs or cracks;

[0092] S2. Specific steps for laser engraving characters:

[0093] S21, placing the metal sheet cut in step 1 on the workbench of the laser engraving equipment, and ensuring that the sheet is stably fixed and does not move during the engraving process;

[0094] S22, set engraving parameters: set the laser power to 30W; set the engraving speed to 800mm / s;

[0095] Set the engraving depth to 0.2mm;

[0096] S23, performing engraving: importing the character pattern to be engraved into the device, starting the laser engraving device, and the device will engrave on the metal plate according to the set parameters and the imported pattern;

[0097] S24. Check the engraving quality: After engraving is completed, turn off the laser engraving equipment; carefully check the engraved characters to ensure that the characters are clear and complete, the depth meets the requirements (0.2mm), and the edges are smooth and free of burrs;

[0098] S3. Specific steps for backfilling the resin light-transmitting material: Material preparation:

[0099] S31. Prepare epoxy resin as a light-transmitting material, place the parts or products that need to be backfilled with the resin light-transmitting material into a preheating device, and perform preheating treatment to improve the backfilling effect; the preheating temperature can be adjusted according to actual conditions, but excessive temperature should be avoided to prevent deformation or damage of the material;

[0100] S32. Set backfill parameters: set the backfill temperature to 120°C; set the backfill pressure to 0.3MPa; place the preheated parts or products into the backfill equipment to ensure that they are positioned correctly and firmly; start the backfill equipment to slowly inject the epoxy resin into the parts that need to be backfilled; during the injection process, pay attention to controlling the injection speed and pressure to ensure that the resin can be evenly filled into each part to avoid gaps or bubbles;

[0101] S33, curing treatment: after the backfilling is completed, the backfilling pressure is kept unchanged, and the parts or products are cured at a temperature of 120°C; the curing time is determined according to the characteristics of the epoxy resin and actual requirements, and the time is 1h-5h;

[0102] S34, cooling and demoulding: after the curing is completed, turn off the heating equipment and let the parts or products cool naturally to room temperature; after the parts or products are cooled, release the backfilling pressure and remove them from the backfilling equipment;

[0103] S35, Quality inspection: Perform appearance inspection on the backfilled parts or products to check for bubbles, cracks, and missing material defects; perform light transmittance test to ensure that the backfilled resin light-transmitting material meets the required light transmittance and optical properties;

[0104] S36, Subsequent processing: Clean and sort qualified parts or products to remove residual resin and impurities on the surface; package and store parts or products for subsequent use or processing;

[0105] S4, Insert Injection Molding:

[0106] S41. Prepare PC (polycarbonate) injection molding materials and ensure that they are dry enough to avoid bubbles or hydrolysis during the injection molding process; check the injection molding machine and mold to ensure that they are operating normally and are clean and free of foreign matter;

[0107] S42, mold preheating: install the mold on the injection molding machine, and set the mold temperature to 80℃ for preheating; the preheating time depends on the size and structure of the mold, and it takes 1-2 hours to ensure that the mold temperature evenly reaches the set value;

[0108] S43, setting injection molding parameters: setting the injection molding temperature to 260°C; setting the injection molding pressure to 80MPa;

[0109] S44, Insert installation: Install the insert accurately to the specified position of the mold, ensuring that the position and direction of the insert are correct;

[0110] S45, injection molding operation: when the mold temperature reaches the set value, add the PC material into the barrel of the injection molding machine; start the injection molding machine, and inject the molten PC material into the mold cavity at a temperature of 260°C and a pressure of 80MPa; during the injection molding process, pay attention to controlling the injection speed and injection volume to ensure that the plastic parts are fully filled and avoid short shots and flash defects;

[0111] S46, holding pressure and cooling: After the injection molding is completed, the injection pressure is maintained for a period of time (holding time) to compensate for the cooling shrinkage of the plastic part and prevent the plastic part from sinking and dimensional instability;

[0112] At the same time, the cooling system of the mold is turned on to cool the plastic part. The cooling time depends on the thickness and material properties of the plastic part and takes from tens of seconds to several minutes.

[0113] S47, demoulding: when the plastic part is cooled to a sufficient hardness, the mold is opened and the plastic part is ejected from the mold;

[0114] S48, Quality inspection: Perform appearance inspection on injection molded plastic parts to check for defects, including shrinkage, bubbles, cracks, and deformation; perform dimensional measurement to check whether the dimensions of the plastic parts meet the requirements;

[0115] S49, Subsequent processing: Deburring and trimming qualified plastic parts to improve the appearance quality and dimensional accuracy of plastic parts; packaging and storage of plastic parts for subsequent assembly or use;

[0116] S5. Surface treatment: Polishing is used for 10 minutes to make the metal surface smoother and enhance the metal texture. Adjust the polishing machine parameters: Set the speed of the polishing machine; the speed should be adjusted according to the type of polishing wheel and the material of the metal workpiece, between 1650r / min-2360r / min;

[0117] Adjust the pressure of the polishing machine: The pressure should be adjusted according to the surface condition of the metal workpiece and the polishing requirements to ensure the polishing effect while avoiding excessive wear on the polishing wheel and the workpiece surface;

[0118] S6, coating protection: use transparent polyurethane coating with a thickness of 0.05mm to enhance the wear resistance and corrosion resistance of the keys;

[0119] S61. Clean the work area to ensure that the environment is clean and tidy, free of dust and debris; prepare the keys to be coated, ensuring that the key surfaces are clean, dry, and free of oil, dust or other contaminants; prepare transparent polyurethane coating materials and coating tools, including spray guns or brushes;

[0120] S62. Prepare coating materials: according to the usage of polyurethane coating materials, mix the main agent and curing agent in the correct proportion; stir the mixed coating materials to make them fully uniform and ensure that there is no precipitation or agglomeration;

[0121] S63. Adjust coating tools: Use a spray gun and adjust the spray shape, spray pressure and paint flow rate of the spray gun to obtain a uniform coating effect;

[0122] S64, coating: Use a spray gun or a brush to evenly coat the prepared transparent polyurethane coating on the surface of the keypad; control the coating thickness to 0.05mm; this can be achieved by applying thin layers multiple times, and wait for an appropriate drying time after each coating before applying the next layer; during the coating process, avoid dripping, bubbles or missing coating defects in the coating;

[0123] S65, Drying and curing: Place the coated buttons in a well-ventilated place and let them dry naturally; according to the requirements of the coating material, control the temperature and humidity of the drying environment to accelerate the drying and curing process of the coating; the drying time is 10h-15h to ensure that the coating is completely cured;

[0124] S66. Check coating quality: After the coating is dried and cured, check the coating quality on the key surface; check whether the coating thickness is uniform and meets the requirement of 0.05mm; check whether the coating appearance is smooth, free of bubbles, wrinkles and peeling defects; check the wear resistance and corrosion resistance of the coating, which can be evaluated by conducting simple friction tests and chemical corrosion tests; follow-up treatment: if defects are found in the coating, including uneven thickness, bubbles or peeling, repair or re-coating is required; properly package and store the coated keys to avoid external contamination and damage;

[0125] S7, waterproof treatment: use nano waterproof agent, spray treatment, the treatment time is 5 minutes, so that the key has a certain waterproof performance;

[0126] S71. Ensure that the work area is clean, well-ventilated, and free of dust and debris; place the keys to be waterproofed on the workbench for easy operation; prepare nano waterproofing agent and spraying equipment, including spray guns;

[0127] S72. Debugging the spraying equipment: According to the characteristics of the nano waterproofing agent and the use of the spraying equipment, adjust the spray shape, spray pressure and flow rate of the spray gun to ensure that the nano waterproofing agent can be sprayed evenly;

[0128] S73, spray nano waterproof agent: Pick up the spray gun and spray the nano waterproof agent evenly on the surface of the key; pay attention to maintain a certain distance and spraying speed to avoid too thick or uneven coating; spray each key in order from left to right and from top to bottom to ensure that the entire key surface is covered;

[0129] S74, treatment time control: spray continuously for 5 minutes to ensure that the nano waterproof agent can fully penetrate into the surface and tiny pores of the keys to achieve a good waterproof effect;

[0130] S75, Drying: After spraying, place the key in a well-ventilated place and let it dry naturally; drying time 12h-16h;

[0131] S76. Check the waterproof effect: After the keys are completely dry, a simple waterproof test can be performed. For example, a small amount of water can be dropped on the key surface to observe whether the water can form water beads on the surface and roll down without penetrating into the key. If it is found that the waterproof effect of the keys is not ideal, they need to be re-sprayed.

[0132] S77. Clean the work area: After the treatment is completed, clean the spraying equipment and work area, and properly store the remaining nano waterproofing agent;

[0133] S8, Color customization: If you need to add color to the buttons, you can use organic dyes for dyeing; select a blue dye, the dyeing temperature is 80℃, and the dyeing time is 20 minutes;

[0134] S81. Preparation: Clean the work area to ensure that there is no dust and debris; prepare the keys to be dyed, ensuring that the key surface is clean and free of oil and impurities; prepare the selected blue organic dye, dyeing container, heating equipment and stirring tools;

[0135] S81. Prepare dye solution: according to the instructions for use of the dye, mix the blue organic dye with an appropriate amount of water, stir evenly, and prepare a dye solution;

[0136] S82, heating the dye solution: pouring the prepared dye solution into a dyeing container; using a heating device to heat the dye solution to 80° C. and keeping the temperature stable;

[0137] S83, dyeing: placing the prepared key into the heated dye solution; ensuring that the key is completely immersed in the dye solution, and gently stirring with a stirring tool to make the key dyed evenly; keeping the key immersed in the dye solution for 20 minutes to achieve the desired dyeing effect;

[0138] S84, taking out the keys and cleaning: after the dyeing time reaches 20 minutes, use a tool to take out the keys from the dye solution; immediately rinse the keys with clean water to remove excess dye on the surface;

[0139] S85. Drying keys: Place the cleaned keys in a well-ventilated place to dry naturally, or use drying equipment to dry them to ensure that the keys are completely dry;

[0140] S86. Check the dyeing effect: After the keys are dry, check whether the dyeing effect meets the requirements, including color uniformity and saturation.

[0141] S9, Electromagnetic compatibility test: Conduct electromagnetic compatibility test in the frequency range of 100MHz-1GHz, with a test field strength of 3V / m to ensure that the buttons work normally in an electromagnetic environment and do not interfere with other electronic equipment;

[0142] S91. Prepare the electromagnetic compatibility test equipment, including the signal generator, power amplifier, antenna, electromagnetic field probe and test receiver; install the key to be tested on the test fixture and connect the relevant power cord and signal cord;

[0143] S92. Set test parameters: Set the frequency range of the signal generator to 100MHz-1GHz and perform frequency scanning in a step-by-step manner; set the output power of the power amplifier so that the test field strength reaches 3V / m; the field strength value can be monitored by the electromagnetic field probe and the test receiver to ensure its accuracy; set the parameters of the test receiver, including measurement bandwidth, detector type and threshold, to meet the test requirements;

[0144] S93. Perform radiation emission test: turn on the signal generator and the power amplifier to generate an electromagnetic radiation signal; use the antenna to transmit the electromagnetic radiation signal into the test space to form a uniform electromagnetic field; place the test fixture with the key installed in the electromagnetic field to ensure that the key is fully radiated by electromagnetic radiation; use the test receiver to measure the radiation emission intensity of the key at different frequencies, and record the test data;

[0145] S94, conduct a conducted emission test: connect the power line and signal line of the key to the conducted emission test equipment; turn on the test equipment, and measure the conducted emission signals of the key on the power line and signal line; also scan within the frequency range of 100 MHz-1 GHz, and record the test data;

[0146] S95. Perform an immunity test: maintain the test field strength at 3V / m and apply electromagnetic interference signals to the buttons;

[0147] Observe the working status of the keys under electromagnetic interference and check whether they work normally, including whether the keys function normally, whether there are any malfunctions or signal loss; record the performance of the keys under electromagnetic interference and any problems that occur;

[0148] S96, Data analysis and evaluation: Analyze the data of radiated emission test, conducted emission test and immunity test; compare the test results with the electromagnetic compatibility standard to evaluate whether the buttons meet the electromagnetic compatibility requirements.

[0149] The metal layer on the surface of the parts of the present invention is cut from metal sheets, the characters are laser engraved, backfilled with resin translucent materials, and then the inserts are injection molded. The present invention achieves a real metal texture and luminous characters, which is more refined than traditional processes. It solves the difficulty that traditional metal materials cannot achieve light transmission. The present invention achieves a metal texture and luminous characters. In order to enhance the refinement of car interiors, this technology is likely to become a trend in the future.

[0150] Experimental example

[0151] Purpose:

[0152] Verify the feasibility of the production process of metal-textured illuminated keys and evaluate their performance and quality.

[0153] Experimental materials and equipment:

[0154] Metal plates: aluminum alloy, stainless steel; laser engraving equipment; backfill resin light-transmitting material: epoxy resin; injection molding machine and mold; polishing equipment; coating material: transparent polyurethane coating; nano waterproofing agent and spraying equipment; organic dyes and dyeing equipment; electromagnetic compatibility testing equipment;

[0155] Experimental steps:

[0156] 1. Metal sheet cutting:

[0157] Choose aluminum alloy or stainless steel plate and check the quality.

[0158] Sheet metal is cut to the desired shape and size using laser cutting or punching processes.

[0159] Fix the sheet, start the cutting equipment, control the cutting speed and avoid burrs or deformation.

[0160] 2. Laser engraving characters:

[0161] Place the cut metal sheet on the workbench of the laser engraving equipment, set the laser power to 30W, the engraving speed to 800mm / s, and the engraving depth to 0.2mm.

[0162] Import the character pattern and start the laser engraving device to engrave.

[0163] Check the engraving quality to ensure that the characters are clear and complete.

[0164] 3. Backfill resin translucent material:

[0165] Prepare epoxy resin and preheat parts to 120°C.

[0166] Set the backfilling temperature to 120°C and the pressure to 0.3MPa to perform the backfilling operation.

[0167] After curing, cool down and check for defects such as bubbles and cracks.

[0168] 4.Insert injection molding:

[0169] Prepare PC injection molding material and ensure it is dry.

[0170] Preheat the mold to 80°C, set the injection temperature to 260°C, and the pressure to 80 MPa.

[0171] Install the insert and proceed with the injection molding operation.

[0172] After holding pressure and cooling, demould and check the quality of the plastic part.

[0173] 5. Surface treatment:

[0174] Polish the metal surface, set the speed to 1650r / min--2360r / min, and adjust the polishing pressure.

[0175] 6. Coating protection:

[0176] Clean the work area and key surfaces and apply the clear polyurethane coating material.

[0177] Use a spray gun to evenly apply the coating, controlling the thickness to 0.05mm.

[0178] Check the coating quality after drying and curing.

[0179] 7. Waterproof treatment:

[0180] Use nano waterproof agent to spray the key surface for 5 minutes.

[0181] Check the waterproofing effect after natural drying.

[0182] 8. Color customization:

[0183] Prepare a blue organic dye solution and heat it to 80°C.

[0184] Soak the keys in the dye solution for 20 minutes.

[0185] Remove, clean and dry, and check the dyeing effect.

[0186] 9. Electromagnetic compatibility test:

[0187] Radiated emission, conducted emission and immunity tests are performed in the frequency range of 100MHz-1GHz.

[0188] Analyze test data and evaluate the electromagnetic compatibility of buttons.

[0189] Experimental data recording

[0190]

[0191]

[0192] Experimental conclusion

[0193] Through this experiment, the feasibility of the production process of metal texture character luminous keys was verified, and all performance indicators met the expected requirements. This process not only achieves the real metal texture and character luminous effect, but also has good durability, waterproofness and electromagnetic compatibility, providing a new solution for improving the exquisiteness of car interiors.

[0194] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention.

Claims

1. A process for making a metallic character luminous key, characterized in that: The following steps are involved: S1. Cutting of metal sheet: Selecting a metal sheet, which includes aluminum alloy or stainless steel; cutting the metal sheet into the size of the key by laser cutting or stamping; S2. Laser engraving characters: Place the cut metal sheet on the workbench of the laser engraving equipment, adjust the laser power and engraving speed, and use the laser engraving machine to engrave the required characters on the cut metal sheet; S3. Backfilling with resin translucent material: Backfill the engraved characters with resin translucent material. Backfill the resin by injection molding or dripping to fill the character grooves with resin. S4. Insert injection molding: Put the metal part filled with resin translucent material as an insert into the injection mold; inject plastic material for injection molding to combine the metal part with the plastic part to form a complete key structure.

2. The process for making a metallic character luminous key according to claim 1, characterized in that: S1. Metal sheet cutting includes the following specific steps: S11. The metal plates selected include aluminum alloy or stainless steel. The scratch length of aluminum alloy plates shall not exceed 2mm, the width shall not exceed 0.1mm, the depth shall not exceed 0.05mm, the pit diameter shall not exceed 1mm, the depth shall not exceed 0.1mm, and the stain area shall not exceed 0.5cm 2 ; S12. Fix the sheet: place the metal sheet on the workbench of the cutting equipment; fix the sheet using a clamp or a magnetic device; S13, cutting: starting the cutting equipment to cut the metal sheet according to the set size and direction; S14. After cutting is completed, turn off the cutting equipment; remove the cut plates and check whether the edges are neat and smooth without obvious burrs or cracks.

3. The process for making a metallic character luminous key according to claim 1, characterized in that: S2. Specific steps for laser engraving characters: S21, placing the cut metal sheet on a workbench of the laser engraving equipment to fix the metal sheet; S22, set engraving parameters: set the laser power to 30W; set the engraving speed to 800mm / s; set the engraving depth to 0.2mm; S23, performing engraving: importing the character pattern to be engraved into the device, starting the laser engraving device, and the device will engrave on the metal plate according to the set parameters and the imported pattern; S24. After engraving is completed, turn off the laser engraving equipment; check the clarity and completeness of the engraved characters, with a depth of 0.2 mm.

4. The process for making a metallic character luminous key according to claim 1, characterized in that: S3. Specific steps of backfilling the resin light-transmitting material: S31, preparing epoxy resin as a light-transmitting material, placing the parts or products that need to be backfilled with the resin light-transmitting material into a preheating device for preheating treatment; S32, set backfill parameters: set the backfill temperature to 120°C; set the backfill pressure to 0.3MPa; put the preheated parts or products into the backfill equipment; start the backfill equipment and slowly inject the epoxy resin into the part that needs to be backfilled; S33, curing treatment: after the backfilling is completed, the backfilling pressure is kept unchanged and the parts or products are cured at a temperature of 120°C; the curing time is 1h-5h; S34, cooling and demoulding: after the curing is completed, turn off the heating equipment and let the parts or products cool naturally to room temperature; after the parts or products are cooled, release the backfilling pressure and take them out from the backfilling equipment; S35. Perform a visual inspection on the backfilled parts or products to check for bubbles, cracks, or missing material defects.

5. The process for making a metallic character luminous key according to claim 1, characterized in that: S4, Insert Injection Molding: S41. Prepare polycarbonate injection molding materials and dry the injection molding materials; check the normal operation of the injection molding machine and the mold; S42, mold preheating: install the mold on the injection molding machine, and set the mold temperature to 80°C for preheating; the preheating time is 1-2 hours; S43, setting injection molding parameters: setting the injection molding temperature to 260°C; setting the injection molding pressure to 80MPa; S44, insert installation: accurately install the insert to the specified position of the mold; S45, injection molding operation: when the mold temperature reaches the set value, add the PC material into the barrel of the injection molding machine; The injection molding machine was started to inject the molten PC material into the mold cavity at a temperature of 260°C and a pressure of 80MPa; S46, pressure holding and cooling: After the injection molding is completed, the injection pressure is maintained for 6min-13min, and the cooling system of the mold is turned on to cool the plastic part; S47, demoulding: When the plastic part is cooled to a sufficient hardness, open the mold and eject the plastic part out of the mold.

6. The process for making a metallic character luminous key according to claim 1, characterized in that: It also includes S5, surface treatment: polishing treatment is adopted, the processing time is 10 minutes, and the speed of the polishing machine is set between 1650r / min-2360r / min.

7. The process for making a metallic character luminous key according to claim 1, characterized in that: Also includes S6, coating protection: The specific steps are as follows: S61. Prepare transparent polyurethane coating materials and coating tools, including spray guns or brushes; S62, preparing coating materials: according to the usage of polyurethane coating materials, the main agent and the curing agent are mixed in a correct proportion, and the mixed coating materials are stirred; S63, using a spray gun, setting the spray shape, spray pressure and paint flow rate of the spray gun; S64. Use a spray gun or a brush to evenly apply the prepared transparent polyurethane coating on the surface of the keypad; control the coating thickness to 0.05mm; S65, Drying and curing: Place the coated keys in a well-ventilated place and let them dry naturally; drying time is 10h-15h; S66. After the coating is dried and cured, check whether the coating thickness meets the requirement of 0.05mm; check whether the coating appearance is smooth, free of bubbles, wrinkles and peeling defects.

8. The process for making a metallic character luminous key according to claim 1, characterized in that: Also includes S7, waterproof treatment: the specific steps are as follows: S71. Ensure the work area is clean and prepare nano waterproofing agent and spraying equipment; S72, spraying the nano waterproofing agent through a spraying device, and setting the spray shape, spray pressure and flow rate of the spray gun; S73, spray nano waterproof agent: pick up the spray gun and spray the nano waterproof agent evenly on the surface of the key; S74, the continuous spraying treatment time is 5 minutes; S75, drying: after spraying, ventilate and dry the keys naturally; drying time is 12h-16h; S76. After the keys are completely dry, drop a small amount of water on the key surface and observe whether the water can form water droplets on the surface and roll down without seeping into the key.

9. The process for making a metallic character luminous key according to claim 1, characterized in that: Also includes S8, color customization: need to add color to the buttons; S81. Prepare the keys to be dyed so that the key surfaces are clean and free of oil stains and impurities; S81, preparing a dye solution: mixing a blue organic dye with an appropriate amount of water, stirring evenly, and preparing a dye solution; S82, heating the dye solution: pouring the prepared dye solution into a dyeing container; Heat the dye solution to 80°C using a heating device; S83, placing the prepared key into the heated dye solution; completely immersing the key in the dye solution, and soaking the key in the dye solution for 20 minutes; S84. After the dyeing time reaches 20 minutes, use a tool to remove the key from the dye solution; and rinse the key with clean water to remove excess dye on the surface; S85. Drying keys: Place the cleaned keys in a well-ventilated place to dry naturally.

10. The process for making a metallic character luminous key according to claim 1, characterized in that: It also includes S9 and luminous button electromagnetic compatibility test: set the frequency range of the signal generator to 100MHz-1GHz, and perform frequency scanning in a step-by-step manner; set the output power of the power amplifier so that the test field strength reaches 3V / m.

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