Processing technology of novel ceramic automotive trim

Abstract

The invention discloses a novel ceramic automotive trim processing technology, and particularly relates to the technical field of automotive trim processing, and the novel ceramic automotive trim processing technology comprises the following steps: S1, selecting injection molding raw materials, designing a mold according to a preset shape of an automotive trim, and putting the injection molding raw materials into an injection molding machine to complete injection molding to obtain an injection molding product smooth plate piece with a flat surface; s2, cleaning and polishing the appearance surface of the smooth plate part of the injection molding product; s3, modified acrylic resin primer is evenly sprayed to the appearance face of the cleaned and polished injection product polished plate, and after spraying is completed, the injection product polished plate is fed into drying equipment to be completely cured; s4, corresponding intermediate paint is selected according to the preset ceramic effect, and if the texture of common ceramic needs to be presented, modified acrylic resin shell paint is sprayed. According to the invention, the complex flow of the traditional ceramic manufacturing process and the incapability of using a high-temperature sintering process in the interior industry are abandoned, and the defects that the traditional ceramic is fragile and is not suitable for consumer products are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile interior processing, more specifically, the present application relates to a new ceramic automobile interior processing technology. BACKGROUND

[0002] With the upgrading of automobile consumption market to high-end and individualization, consumers have higher requirements for the texture, cultural connotation and performance stability of automobile interiors, and interior parts with traditional aesthetic value and modern industrial performance have become the focus of industry competition. Ceramic materials with their warm and delicate texture, unique texture (such as Ru kiln opening piece) and excellent chemical stability have become an ideal choice to improve the grade of interior decoration, but the application of traditional ceramic processing technology in the field of automobile interior has many bottlenecks.

[0003] Traditional industrial ceramic processing needs to go through the complex processes of raw material crushing, ingredient mixing, molding, multiple drying, repairing, glazing, high temperature sintering and polishing. Not only is the production cycle long and the efficiency low, but also the high temperature sintering process consumes a lot of energy, and the overexploitation of natural mineral raw materials such as kaolin will damage the ecological environment. More importantly, traditional ceramics are brittle and have poor impact resistance, and cannot withstand the vibration and slight collision during driving, which are prone to damage. At the same time, its molding method is limited by the mold and sintering process, and it is difficult to realize the complex modeling and lightweight design required by automobile interior, especially the opening piece ceramics such as Ru kiln, which have very high requirements for the precise control of the expansion coefficient of glaze and matrix, and it is difficult to mass-produce, which cannot meet the batch manufacturing needs of automobile interior.

[0004] In order to solve the above problems, a technical scheme is provided. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a new ceramic automobile interior processing technology to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A new ceramic automobile interior processing technology, comprising the following steps: Step S1: selecting injection molding raw materials, designing a mold according to the preset modeling of the automobile interior part, putting the injection molding raw materials into an injection molding machine to complete the injection molding, and obtaining a smooth injection molding product light plate; Step S2: cleaning and polishing the appearance of the injection molding product light plate; Step S3: uniformly spraying modified acrylic resin primer on the appearance of the injection molding product light plate after cleaning and polishing, and after spraying, sending it into a drying equipment to completely cure the primer; Step S4: according to the preset ceramic effect, the corresponding intermediate paint is selected, if ordinary ceramic texture is needed, modified acrylic resin shell paint is sprayed, if flaky ceramic texture is needed, flaky paint is sprayed, and after spraying, it is sent to a drying device for drying treatment; Step S5, continue to spray the modified acrylic resin topcoat, and send the workpiece into the drying device for complete curing to obtain a new type of ceramic automotive interior part.

[0007] In a preferred embodiment, in step S1, the injection molding raw material is PC / ABS+GF20 composite material, the injection molding temperature is 220-260℃, the mold temperature is 60-80℃, the injection molding pressure is 80-120MPa, the holding pressure time is 10-20s, and after injection molding, the injection molding product light plate is deburred.

[0008] It should be noted that the parameter range is suitable for the melting characteristics of PC / ABS+GF20 composite material, which can avoid incomplete molding caused by too low temperature or material degradation caused by too high temperature, and reasonable pressure and holding pressure time can improve the density of the matrix, reduce internal defects, and deburring treatment provides a smooth substrate for subsequent spraying.

[0009] In a preferred embodiment, in step S2, isopropanol is used to wipe the appearance surface of the injection molding product light plate, and surface oil stains, dust impurities are removed, and then 400-600 mesh sandpaper is used to finely polish the appearance surface, the roughness Ra of the appearance surface after polishing is ≤0.8μm, and after polishing, isopropanol is used to wipe and clean again and air dry.

[0010] It should be noted that 400-600 mesh sandpaper can remove injection molding marks without causing deep scratches, and controlling the roughness Ra≤0.8μm can greatly improve the adhesion of the primer and prevent the subsequent coating from falling off.

[0011] In a preferred embodiment, in step S3, the modified acrylic resin primer is sprayed by electrostatic spraying, the distance between the spray gun and the appearance surface of the injection molding product light plate is 15-25cm, the spraying air pressure is 0.3-0.5MPa, the film thickness of the modified acrylic resin primer is controlled to be 15-25μm, the drying temperature of the drying device is 60-80℃, and the drying time is 15-25min.

[0012] It should be noted that avoiding incomplete curing caused by too low temperature or yellowing of the coating caused by too high temperature ensures that the primer is firmly combined with the matrix.

[0013] In a preferred embodiment, in step S4, the modified acrylic resin shell paint and the flaking paint are both sprayed by air spraying, the distance between the spray gun and the surface of the cured modified acrylic resin primer is 20-30 cm, the spraying air pressure is 0.2-0.4 MPa, the film thickness of the middle paint is controlled to be 20-30 μm, the drying temperature of the drying equipment is 50-70 °C, and the drying time is 20-30 min.

[0014] It should be noted that the film thickness of 20-30 μm can fully exhibit the ceramic texture; the environmental parameters of the flaking paint and the single thin spraying requirement are the key to accurately control the crack size and distribution, which can avoid uneven flaking caused by unsuitable temperature and humidity, and ensure stable and beautiful flaking effect.

[0015] In a preferred embodiment, in step S4, when spraying the flaking paint, the spraying environment temperature is controlled to be 23-27 °C and the relative humidity is 70-80%, and the flaking paint is sprayed by single thin spraying, and after spraying, the flaking paint is naturally placed for 5-10 min before being sent to the drying equipment.

[0016] It should be noted that the drying parameters are designed for the middle paint composition, and the lower temperature can avoid the premature closure of the flaking paint cracks, and sufficient drying time can ensure the complete curing of the middle paint, and the stability of the ceramic texture.

[0017] In a preferred embodiment, in step S5, the modified acrylic resin topcoat is sprayed by electrostatic spraying, the distance between the spray gun and the surface of the cured middle paint is 15-25 cm, the spraying air pressure is 0.3-0.5 MPa, the film thickness of the topcoat is controlled to be 10-20 μm, the drying temperature of the drying equipment is 70-90 °C, and the drying time is 25-35 min.

[0018] It should be noted that electrostatic spraying can ensure uniform coverage of the topcoat, and the film thickness of 10-20 μm can protect the texture of the middle paint without hiding the ceramic texture; the drying temperature of 70-90 °C can promote the rapid cross-linking and curing of the topcoat, and improve the surface hardness and wear resistance.

[0019] In a preferred embodiment, the modified acrylic resin primer in step S3, the modified acrylic resin shell paint and the flaking paint in step S4, and the modified acrylic resin topcoat in step S5 are subjected to automobile interior part environmental testing, and the test items include high-low temperature cycle test, wet heat test, 500g weight friction 500 times abrasion resistance test, and 100g steel ball 50cm height impact resistance test.

[0020] The technical effects and advantages of the processing technology of the new ceramic automobile interior are as follows: 1. By adopting the process route of injection molding substrate and multi-layer functional spraying, the problems of high energy consumption, large pollution and limited molding caused by high temperature sintering are completely avoided. Through the precise matching of modified acrylic resin series coatings, the warm texture of ordinary ceramics and the unique texture of traditional crackled ceramics can be efficiently replicated. Moreover, the injection molding process can realize the integrated molding of complex shapes, perfectly meeting the needs of automotive interiors for diverse shapes and lightweight design.

[0021] 2. PC / ABS+GF20 composite material is selected as the injection molding matrix. This material has excellent strength, toughness and heat resistance, which fundamentally solves the defects of traditional ceramics such as fragility and poor impact resistance. At the same time, the multi-layer coating system of primer, intermediate coat and top coat is precisely controlled by spraying and curing process. It not only has a firm bond with the matrix, but also can withstand the complex working conditions of high and low temperature cycle, humidity and heat, friction and impact of automotive interior, ensuring stable texture and reliable performance during long-term use of the product. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the processing technology of a novel ceramic automotive interior according to the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 Figure 1 The present invention discloses a processing technology for a novel ceramic automotive interior, which includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

[0025] In step S1, the injection molding material is PC / ABS+GF20 composite material, the injection temperature is 220℃, the mold temperature is 60℃, the injection pressure is 80MPa, the holding time is 10s, and after injection molding, the injection molded product is deburred.

[0026] In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 400-grit sandpaper. After polishing, the surface roughness Ra≤0.8μm. After polishing, the surface is wiped clean again with isopropyl alcohol and then dried.

[0027] In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 15cm, the spraying air pressure is 0.3MPa, the film thickness of the modified acrylic resin primer is controlled at 15μm, the drying temperature of the drying equipment is 60℃, and the drying time is 15min.

[0028] In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 20cm, the spraying air pressure is 0.2MPa, the intermediate paint film thickness is controlled at 20μm, the drying temperature of the drying equipment is 50℃, and the drying time is 20min.

[0029] In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 23℃ and the relative humidity is 70%. The crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 5 minutes before sending it into the drying equipment.

[0030] In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. The distance between the spray gun and the cured surface of the intermediate coat is 15cm, the spraying air pressure is 0.3MPa, the topcoat film thickness is controlled at 10μm, the drying temperature of the drying equipment is 70℃, and the drying time is 25min.

[0031] The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

[0032] Example 2 Figure 1The present invention discloses a processing technology for a novel ceramic automotive interior, which includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

[0033] In step S1, the injection molding material is PC / ABS+GF20 composite material, the injection temperature is 230℃, the mold temperature is 65℃, the injection pressure is 90MPa, the holding time is 12s, and after injection molding, the smooth part of the injection molded product is deburred.

[0034] In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 450-grit sandpaper. After polishing, the surface roughness Ra ≤ 0.8μm. After polishing, the surface is wiped clean again with isopropyl alcohol and then dried.

[0035] In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 18cm, the spraying air pressure is 0.3MPa, the film thickness of the modified acrylic resin primer is controlled at 18μm, the drying temperature of the drying equipment is 65℃, and the drying time is 18min.

[0036] In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 22cm, the spraying air pressure is 0.2MPa, the intermediate paint film thickness is controlled at 22μm, the drying temperature of the drying equipment is 55℃, and the drying time is 22min.

[0037] In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 24℃ and the relative humidity is 72%. The crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 7 minutes before sending it into the drying equipment.

[0038] In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. The distance between the spray gun and the cured surface of the intermediate coat is 18cm, the spraying air pressure is 0.3MPa, the topcoat film thickness is controlled at 12μm, the drying temperature of the drying equipment is 75℃, and the drying time is 28min.

[0039] The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

[0040] Example 3 Figure 1 The present invention discloses a processing technology for a novel ceramic automotive interior, which includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

[0041] In step S1, the injection molding material is PC / ABS+GF20 composite material, the injection temperature is 240℃, the mold temperature is 70℃, the injection pressure is 100MPa, the holding time is 15s, and after injection molding, the smooth part of the injection molded product is deburred.

[0042] In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 500-grit sandpaper. After polishing, the surface roughness Ra≤0.8μm. After polishing, the surface is wiped clean with isopropyl alcohol again and then dried.

[0043] In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 20cm, the spraying air pressure is 0.4MPa, the film thickness of the modified acrylic resin primer is controlled at 20μm, the drying temperature of the drying equipment is 70℃, and the drying time is 20min.

[0044] In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 25cm, the spraying air pressure is 0.3MPa, the intermediate paint film thickness is controlled at 25μm, the drying temperature of the drying equipment is 60℃, and the drying time is 25min.

[0045] In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 25℃ and the relative humidity is 75%, and the crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 8 minutes before sending it into the drying equipment.

[0046] In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. The distance between the spray gun and the cured surface of the intermediate coat is 20cm, the spraying air pressure is 0.4MPa, the topcoat film thickness is controlled at 15μm, the drying temperature of the drying equipment is 80℃, and the drying time is 30min.

[0047] The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

[0048] Example 4 Figure 1 The present invention discloses a processing technology for a novel ceramic automotive interior, which includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

[0049] In step S1, the injection molding material is PC / ABS+GF20 composite material, the injection temperature is 250℃, the mold temperature is 75℃, the injection pressure is 110MPa, the holding time is 18s, and after injection molding, the injection molded product blank part is deburred.

[0050] In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 550-grit sandpaper. After polishing, the surface roughness Ra≤0.8μm. After polishing, the surface is wiped clean with isopropyl alcohol again and then dried.

[0051] In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 22cm, the spraying air pressure is 0.4MPa, the film thickness of the modified acrylic resin primer is controlled at 22μm, the drying temperature of the drying equipment is 75℃, and the drying time is 22min.

[0052] In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 28cm, the spraying air pressure is 0.3MPa, the intermediate paint film thickness is controlled at 28μm, the drying temperature of the drying equipment is 65℃, and the drying time is 28min.

[0053] In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 26℃ and the relative humidity is 78%, and the crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 8 minutes before sending it into the drying equipment.

[0054] In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. The distance between the spray gun and the cured surface of the intermediate coat is 22cm, the spraying air pressure is 0.4MPa, the topcoat film thickness is controlled at 18μm, the drying temperature of the drying equipment is 85℃, and the drying time is 32min.

[0055] The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

[0056] Example 5 Figure 1The present invention discloses a processing technology for a novel ceramic automotive interior, which includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

[0057] In step S1, the injection molding material is PC / ABS+GF20 composite material, the injection temperature is 260℃, the mold temperature is 80℃, the injection pressure is 120MPa, the holding time is 20s, and after injection molding, the smooth part of the injection molded product is deburred.

[0058] In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 600-grit sandpaper. After polishing, the surface roughness Ra≤0.8μm. After polishing, the surface is wiped clean with isopropyl alcohol again and then dried.

[0059] In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 25cm, the spraying air pressure is 0.5MPa, the film thickness of the modified acrylic resin primer is controlled at 25μm, the drying temperature of the drying equipment is 80℃, and the drying time is 25min.

[0060] In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 30cm, the spraying air pressure is 0.4MPa, the intermediate paint film thickness is controlled at 30μm, the drying temperature of the drying equipment is 70℃, and the drying time is 30min.

[0061] In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 27℃ and the relative humidity is 80%, and the crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 10 minutes before sending it into the drying equipment.

[0062] In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. The distance between the spray gun and the cured surface of the intermediate coat is 25cm, the spraying air pressure is 0.5MPa, the topcoat film thickness is controlled at 20μm, the drying temperature of the drying equipment is 90℃, and the drying time is 35min.

[0063] The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

[0064] Novel ceramic automotive interior parts were prepared through Examples 1-5. The bending strength and coating hardness of the prepared novel ceramic automotive interior parts were tested, and the results are shown in the table below: As can be seen from the above, the obtained novel ceramic automotive interior parts have high bending strength and high coating hardness, and Example 5 is the best embodiment.

[0065] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0066] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel processing technology for ceramic automotive interior trim, characterized in that, Includes the following steps: Step S1: Select injection molding raw materials, design molds according to the preset shape of automotive interior parts, put the injection molding raw materials into the injection molding machine to complete the injection molding process, and obtain smooth injection molded product blank parts. Step S2: Clean and polish the surface of the injection molded product. Step S3: Apply modified acrylic resin primer evenly to the surface of the cleaned and polished injection molded product. After spraying, send it into the drying equipment to allow the primer to fully cure. Step S4: Select the corresponding medium paint according to the preset ceramic effect. If a normal ceramic texture is required, spray modified acrylic resin shell paint. If a crackled ceramic texture is required, spray crackled paint. After spraying, send it to the drying equipment for drying treatment. Step S5: Continue spraying the modified acrylic resin topcoat, and send the workpiece into the drying equipment to allow it to fully cure, thus obtaining a new type of ceramic automotive interior part.

2. The processing technology for a novel ceramic automotive interior according to claim 1, characterized in that: In step S1, the injection temperature is 220-260℃, the mold temperature is 60-80℃, the injection pressure is 80-120MPa, the holding time is 10-20s, and after injection molding, the smooth part of the injection molded product is deburred.

3. The processing technology for a novel ceramic automotive interior according to claim 2, characterized in that: In step S2, the surface of the injection molded product is first wiped with isopropyl alcohol to remove surface oil, dust and impurities. Then, the surface is finely polished with 400-600 grit sandpaper. After polishing, the surface roughness Ra≤0.8μm. After polishing, the surface is wiped clean again with isopropyl alcohol and then dried.

4. The processing technology for a novel ceramic automotive interior according to claim 3, characterized in that: In step S3, the modified acrylic resin primer is sprayed using electrostatic spraying. During spraying, the distance between the spray gun and the surface of the injection molded product is 15-25cm, the spraying air pressure is 0.3-0.5MPa, the film thickness of the modified acrylic resin primer is controlled at 15-25μm, the drying temperature of the drying equipment is 60-80℃, and the drying time is 15-25min.

5. The processing technology for a novel ceramic automotive interior according to claim 4, characterized in that: In step S4, both the modified acrylic resin shell paint and the crackle paint are sprayed using air spraying. During spraying, the distance between the spray gun and the surface of the modified acrylic resin primer after curing is 20-30cm, the spraying air pressure is 0.2-0.4MPa, the intermediate paint film thickness is controlled at 20-30μm, the drying temperature of the drying equipment is 50-70℃, and the drying time is 20-30min.

6. The processing technology for a novel ceramic automotive interior according to claim 5, characterized in that: In step S4, when spraying the crackle paint, the spraying environment temperature is controlled at 23-27℃ and the relative humidity is 70-80%. The crackle paint is sprayed in a single thin spray. After spraying, let it stand naturally for 5-10 minutes before sending it into the drying equipment.

7. The processing technology for a novel ceramic automotive interior according to claim 6, characterized in that: In step S5, the modified acrylic resin topcoat is applied by electrostatic spraying. During spraying, the distance between the spray gun and the cured surface of the intermediate coat is 15-25cm, the spraying air pressure is 0.3-0.5MPa, the topcoat film thickness is controlled at 10-20μm, the drying temperature of the drying equipment is 70-90℃, and the drying time is 25-35min.

8. The processing technology for a novel ceramic automotive interior according to claim 7, characterized in that: The modified acrylic resin primer in step S3, the modified acrylic resin shell paint and crackle paint in step S4, and the modified acrylic resin topcoat in step S5 were all subjected to environmental testing for automotive interior parts. The test items included high and low temperature cycle test, damp heat test, 500-cycle friction test with a 500g load, and impact resistance test with a 100g steel ball at a height of 50cm.

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