Manufacturing process of hair decoration jade product

Abstract

The invention relates to the technical field of ornament manufacturing, and particularly discloses a manufacturing process of a hair ornament jade product. According to the process, natural jade is firmly combined with various base materials such as metal, plastic or fabric through a systematic method. The preparation method comprises the following steps: carrying out screening and plasma cleaning on a multicolor jade raw material, forming a silicon dioxide nano layer through chemical vapor deposition, and constructing a micron-sized anchoring structure by adopting pulse laser etching; according to the characteristics of different base materials such as metal, plastic and fabric, surface adaptability treatment is conducted in the mode that composite coating deposition and injection molding are combined with prime coat treatment and plasma activation is combined with a special coating agent; a microencapsulation adhesive containing phase change energy storage microspheres is adopted, interface forming is achieved through magnetic field auxiliary combination and a stepped curing process, and finally a finished product is obtained through multi-layer polishing. The technical problem that the interface bonding force of dissimilar materials is insufficient is effectively solved, and the method has the advantages of being good in process synergy, stable in bonding interface and high in finished product reliability.

Description

Technical Field

[0001] This application relates to the field of decorative item manufacturing technology, and more specifically, it relates to a manufacturing process for jade hair ornaments. Background Technology

[0002] Jade accessories are widely used in the jewelry industry due to their natural beauty and cultural significance. To achieve both functional wearability and structural stability, they often need to be combined with basic jewelry components to form a composite structure. These basic components not only hold and secure the jade but also enhance the overall decorative effect through design. Combining jade with dissimilar materials like metal is a common requirement in the manufacture of everyday accessories such as hair clips. Current traditional techniques mainly involve physical drilling and inlaying or directly using adhesives to fix the two. Physical drilling and inlaying can easily cause the jade to crack due to stress concentration, while direct adhesive bonding suffers from weak adhesion and susceptibility to environmental aging and failure.

[0003] At its root, jade, as a natural mineral material, has strong chemical inertness, a hard texture, and a smooth surface. In contrast, the coefficient of thermal expansion and surface energy of metallic materials differ significantly from those of jade. This stark difference in physicochemical properties makes it difficult for the two to form a strong and lasting bond. Furthermore, current pretreatment processes for jade surfaces are mostly limited to simple cleaning or conventional polishing, failing to effectively activate the jade surface or create a surface structure conducive to bonding. This further limits the bonding area between jade and metal, resulting in weak interfacial bonding forces. Ultimately, this makes the bonded structure prone to loosening and detachment due to external forces or environmental influences. Summary of the Invention

[0004] In order to solve the problem of insufficient interfacial bonding between jade and the basic components of jewelry due to differences in physical and chemical properties in the existing technology, this application provides a manufacturing process for jade hair ornaments.

[0005] A process for making jade hair ornaments includes the following steps:

[0006] S1. Jade Selection and Screening: Natural jade scraps are selected as raw materials, and then jade with uniform internal structure is screened out, with a thickness ranging from 1.3-10.3mm; S2. Jade Pretreatment and Nano-Strengthening: The screened jade undergoes a two-step cleaning process: first, ultrasonic cleaning, then treatment in a plasma atmosphere. Subsequently, a combination of precision cutting and hand carving is used to process the jade into various shapes and engrave various patterns. A silica nanolayer is formed on the surface of the shaped jade using chemical vapor deposition; S3. Activation of Jade Surface Microstructure: Pulsed laser etching is used on the jade bonding surface to control the surface roughness to Ra0.8μm to Ra1.8μm; S4. Preparation of Jewelry Base Components and Composite Coating: Jewelry base components are made using metal, plastic, or fabric materials through appropriate molding processes. When the substrate is metal, ... Its surface is coated with a composite layer of titanium nitride and silver; when the substrate is plastic or fabric, a suitable primer is applied to its surface; S5, Bio-based coating on metal surface: a bio-based anti-corrosion coating is applied on the outside of the composite coating; S6, Micro-dispensing coating: a two-component adhesive composed of modified epoxy resin and microencapsulated curing agent is used, in which phase change energy storage microspheres are dispersed, and it is precisely coated on the activated surface of jade by micro-dispensing technology; S7, Magnetic field-assisted bonding and pressurization: the jade coated with adhesive is aligned and bonded to the basic components of the jewelry in a directional magnetic field, while pressure is applied simultaneously; S8, Stepped curing: first, it is pre-cured under ultraviolet light, and then subjected to stepped heating and curing; S9, Mirror polishing treatment: the bonded accessories are subjected to rough polishing, fine polishing and mirror polishing in sequence; S10, Comprehensive quality inspection: the finished product is subjected to appearance quality inspection and bonding strength test.

[0007] By adopting the above technical solutions, natural jade scraps are selected and their thickness controlled within the range of 1.3-10.3mm to provide a standardized raw material base for subsequent processing. Ultrasonic cleaning combined with argon atmosphere plasma treatment, and chemical vapor deposition, are used to form a silica nanolayer on the surface of the precisely cut and hand-carved jade, achieving surface purification and improved interface properties. Pulsed lasers with specific parameters are used to etch the jade bonding surface, forming a microstructure with a specified roughness range. Metal, plastic, or fabric jewelry base components are fabricated using metal injection molding or corresponding molding processes, and a titanium nitride silver composite coating and a chitosan nanocellulose bio-based coating are sequentially deposited on their surfaces to construct a multi-layered protective system. Modified epoxy resin adhesive containing phase change energy storage microspheres is precisely coated onto the activated jade surface using micro-dispensing technology. Precise interface bonding is achieved through component alignment and pressure bonding in a directional magnetic field environment. Adhesive curing is completed using a combination of ultraviolet pre-curing and stepped temperature thermal curing. The product surface is treated with a graded polishing process. Finally, the interface quality is verified through bonding strength testing.

[0008] Preferably, in step S1, the jade scrap includes at least one of jasper, Xiuyan jade, or Dushan jade, and its water content by mass percentage is less than 0.5%.

[0009] By adopting the above technical solutions, we can select raw materials that are suitable in texture, possess both natural aesthetic attributes and basic structural stability. At the same time, by controlling the moisture content of jade scraps to be below 0.5% by mass, we can avoid problems such as fluctuations in the internal structure of jade due to high moisture content, or cracking and poor coating adhesion caused by moisture changes in subsequent cutting and surface treatment processes. This provides a uniform and stable base material for the entire process of jade pretreatment and integration with basic jewelry components, ensuring the smooth implementation of each process step and laying the raw material foundation for the structural integrity and appearance of the finished jewelry.

[0010] Preferably, in step S2, the ultrasonic cleaning frequency is 40kHz, the cleaning temperature is 20-40℃, and the cleaning time is 5-15 minutes; the plasma treatment is carried out in an argon atmosphere, with a processing power of 200-500W and a processing time of 60-180s; the chemical vapor deposition uses tetraethoxysilane as a precursor, nitrogen as the carrier gas, a gas flow rate of 100-500mL / min, a deposition thickness of 50-200nm, and a reaction temperature of 350-450℃.

[0011] By employing the above technical solutions, ultrasonic cleaning at a frequency of 40kHz, a temperature of 20-40℃, and a duration of 5-15 minutes precisely removes dust, oil, and other adhering impurities from the jade surface, while avoiding damage to the natural structure of the jade due to improper cleaning conditions. Plasma treatment in an argon atmosphere at a power of 200-500W for 60-180s breaks inert chemical bonds on the jade surface, constructs surface active sites, and enhances the reactivity and adsorption capacity of the jade surface. Using tetraethoxysilane as a precursor and nitrogen as a carrier gas, controlling the gas flow rate at 100-500mL / min and the reaction temperature at 350-450℃, a 50-200nm thick silica nanolayer is deposited on the cut jade surface, forming a uniform and dense transitional adhesion layer on the jade surface, filling minor surface defects, and enhancing the foundation for subsequent bonding with adhesives.

[0012] Preferably, in step S3, the wavelength of the pulsed laser is 1064 nm, the pulse frequency is 10-50 kHz, and the energy density is 5-15 J / cm². 2 .

[0013] By employing the above technical solution and using a pulsed laser with a wavelength of 1064nm, the laser energy is precisely applied to the jade surface, balancing etching efficiency with protection of the jade's internal natural structure. This wavelength is well-suited to the absorption rates of natural jades such as nephrite, Xiuyan jade, and Dushan jade. It avoids energy concentration that could damage the jade's interior due to an excessively short wavelength, nor energy penetration that would prevent effective surface etching due to an excessively long wavelength. By controlling the pulse frequency within the 10-50kHz range, the density and spacing of the laser etching points can be precisely controlled. The frequency can be adjusted according to the hardness of different jade materials, ensuring the formation of uniformly distributed micro-etching marks on the jade's interface and avoiding overly dense or sparse local etching. The energy density is set to 5-15J / cm². 2 This process achieves a target roughness of Ra0.8μm to Ra1.8μm on the surface of jade while avoiding excessive energy that could cause the jade surface to melt, crack, or form a brittle layer, thus ensuring that the etched surface has both a rough structure and structural integrity.

[0014] Preferably, in step S4, the thickness of the jewelry base component is 0.6-1.8 mm; the mass percentage of silver in the composite coating is 5%-15%, and the coating thickness is 2-8 μm; when metal materials are used, they are manufactured by metal injection molding process, and the feed composition is 85%-92% metal powder and 8%-15% polymer binder.

[0015] By adopting the above technical solutions, the manufacturing process of the basic jewelry components is optimized to suit the characteristics of different substrates: metal components are made of iron-based or titanium alloy materials to balance structural strength and lightweight requirements; plastic components use optimized injection molding conditions to ensure shape accuracy and molding integrity; fabric components undergo plasma surface activation treatment to enhance interfacial bonding performance. Uniform control of component thickness achieves weight balance with the jade material, preventing structural instability. The metal surface employs a composite coating design, utilizing silver components to enhance coating density, and controlling coating thickness to maintain interfacial bonding quality while ensuring protective effects. Metal injection molding uses optimized feed ratios, balancing molding flowability and component mechanical properties to ensure the complete molding of complex structures.

[0016] Preferably, in step S5, the bio-based anti-corrosion coating is composed of chitosan and nanocellulose, wherein the mass fraction of nanocellulose is 3%-8%, derived from wood fiber or seaweed fiber, and the dry film thickness of the coating is 10-30μm.

[0017] By employing the above technical solution, a bio-based anti-corrosion coating is constructed using a composite of chitosan and nanocellulose. The reinforcing effect of nanocellulose improves the structural density and mechanical properties of the pure chitosan coating. Controlling the addition ratio of nanocellulose ensures its uniform dispersion in the matrix, effectively filling micropores while maintaining the coating system's applicability. By optimizing the coating thickness, a continuous protective layer is formed while ensuring complete coverage of the substrate surface, avoiding excessive thickness that could negatively impact the subsequent bonding interface quality, thus achieving a balance between protective performance and interfacial bonding.

[0018] Preferably, in step S6, the phase change energy storage microspheres have a particle size of 5-25 μm, a core material of paraffin, and a phase change temperature of 28-32℃; the adhesive has a viscosity range of 800-1500 mPa·s; and the microencapsulation curing agent has a wall material of urea-formaldehyde resin with a wall thickness of 1-3 μm.

[0019] By employing the above technical solutions and selecting energy storage microspheres with specific particle sizes and phase change characteristics, we ensure their uniform dispersion in the adhesive system and enable them to function as temperature buffers, effectively alleviating interfacial thermal stress. By controlling the rheological properties of the adhesive, we ensure the precise implementation of the micro-dispensing process and achieve uniform coverage of the bonding surface. Using microcapsule curing agents with specific wall material structures maintains storage stability and ensures timely release of active components under use conditions, thereby optimizing the curing process and improving the reliability of interfacial bonding.

[0020] Preferably, in step S7, the directional magnetic field strength is 0.3-0.8T, the magnetic field direction forms an angle of 75-90° with the bonding surface, and is generated by a permanent magnet array or an electromagnet system; the pressure is 0.3-0.9MPa, and the pressure holding time is 45-100s.

[0021] By employing the above technical solution and utilizing directional magnetic field-assisted bonding technology, precise alignment of components is achieved through magnetic force in a specific direction, effectively avoiding the generation of bonding gaps. Combined with a controllable pressure system, the adhesive ensures tight bonding between irregularly shaped components, guaranteeing sufficient interface contact while preventing substrate damage. Maintaining stable pressure for an appropriate duration provides the necessary setting period for the adhesive, preventing component rebound and displacement, and creating ideal interface conditions for subsequent curing processes. This integrated system significantly improves the accuracy and reliability of heterogeneous material assembly through the synergistic effect of magnetism and force.

[0022] Preferably, in step S8, the wavelength of the ultraviolet pre-curing is 365 nm, and the light intensity is 50-100 mW / cm². 2 The pre-curing time is 60-120s; the step-by-step heating curing is specifically to raise the temperature from 30℃ to 50℃ at a rate of 2℃ / min, hold for 10min, and then raise it to 75℃ at a rate of 1℃ / min, with a total curing time of 25-50min.

[0023] By employing the above technical solution and utilizing a UV pre-curing process, the photosensitive components in the adhesive are precisely activated, triggering a preliminary cross-linking reaction to form the initial cured state. This effectively fixes the relative positions of the components, establishing a stable foundation for subsequent thermal curing. Combined with a stepped temperature-controlled thermal curing procedure, the adhesive components are allowed to fully diffuse and react slowly through staged temperature control, promoting complete cross-linking of molecular chains while avoiding internal stress concentration and damage to the interface coating. This ensures complete curing under different coating conditions, thereby guaranteeing the structural integrity and long-term service stability of the bonding interface.

[0024] Preferably, in step S9, the coarse polishing uses silicon carbide abrasive with a particle size of 15-25μm, the fine polishing uses alumina abrasive with a particle size of 5-10μm, and the mirror polishing uses diamond suspension with a particle size of 0.5-2μm.

[0025] By adopting the above technical solutions, the rough polishing process uses 15-25μm silicon carbide abrasive, which can efficiently remove adhesive residue, burrs, and processing defects from the bonded surface. It quickly repairs the surface morphology while avoiding deep scratches or excessive wear of the coating on the jade, laying a smooth foundation for fine polishing. Fine polishing uses 5-10μm alumina abrasive, which can refine the residual scratches from rough polishing and improve the overall smoothness. Its fine texture and stable chemical properties do not react with the jade or coating, avoiding the introduction of new contamination or damage, thus preparing for mirror polishing. Mirror polishing uses 0.5-2μm diamond suspension, which can achieve ultra-high gloss and fine smoothness. The ultra-hardness of diamond allows for high-precision polishing, and the fine particle size makes the scratches invisible to the naked eye. The suspension form ensures that the abrasive is evenly dispersed, avoiding local over-polishing and fully showcasing the warm luster of the jade and the delicate texture of the parts.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. The process described in this application significantly improves the surface activity and microstructure of jade through the synergistic treatment of screening, plasma cleaning, nano-silica deposition and laser etching, providing a solid physical anchoring and chemical bonding basis for the bonding of heterogeneous materials, and effectively solving the problem of insufficient bonding force.

[0028] 2. In this application, a dual-layer protective system of titanium nitride silver composite coating and bio-based anti-corrosion coating is preferred, combined with an adhesive containing phase change microspheres, to synergistically improve the corrosion resistance and thermal stress resistance of the metal substrate and ensure the long-term stability of the bonding interface under harsh environments.

[0029] 3. The method of this application achieves uniform curing and internal stress release of the adhesive through precise control of magnetic field-assisted bonding, ultraviolet pre-curing and stepped thermal curing. Combined with multi-level polishing process, it effectively reduces interface defects and improves the appearance quality and bonding reliability of the finished product.

[0030] 4. This process constructs a multi-material combination system that is compatible with metal, plastic and fabric substrates. Through targeted coating and surface treatment, it achieves precise adaptation of heterogeneous interfaces, breaks through the material limitations of traditional processes, and significantly expands the diversity of product design. Attached Figure Description

[0031] Figure 1 This is a flowchart of the manufacturing process for a jade hair ornament provided in this application. Detailed Implementation

[0032] The present application will be further described in detail below with reference to embodiments and comparative examples. Unless otherwise specified, the experimental methods used below are conventional methods. Unless otherwise specified, the materials, reagents, methods and instruments used are all conventional materials, reagents, methods and instruments in the art, which can be obtained by those skilled in the art through commercial channels or prepared according to literature methods.

[0033] Technical concept:

[0034] This technical solution addresses the core issue of insufficient bonding strength between jade and dissimilar materials, achieving reliable bonding through innovative end-to-end processes. First, spectral screening ensures the uniformity of the jade substrate. Plasma activation and nano-silica deposition enhance surface activity, followed by laser etching to construct micron-level anchoring structures, increasing the bonding area. For different substrate characteristics, a titanium nitride-silver composite coating and a bio-based anti-corrosion dual-layer system are designed for metal components; injection molding and a specialized primer are used for plastic substrates; and plasma activation and a polyurethane primer are employed to achieve interface compatibility for fabric substrates. During the bonding stage, an adhesive containing phase-change microspheres is used, employing a synergistic process of magnetic field-assisted positioning, UV pre-curing, and stepped thermosetting to ensure uniform interface formation and stress release. This technical system achieves high-performance bonding of jade with various substrates, overcoming the material limitations of traditional processes.

[0035] Preparation Example 1

[0036] The preparation method of the bio-based anti-corrosion coating is as follows:

[0037] Take 100g of dried lignocellulose and add 500mL of 10% sodium hydroxide solution. Stir at 80℃ for 2 hours to remove lignin and hemicellulose. After filtration, wash with deionized water until neutral to obtain crude cellulose. Add 300mL of 5% sodium hypochlorite solution to the crude cellulose and stir at room temperature for 1 hour for bleaching. After filtration and washing, add deionized water to prepare a 2% cellulose suspension. Use a high-pressure homogenizer at 80MPa for 15 cycles to prepare a nanocellulose dispersion with a particle size of 10-50nm. Take 20g of chitosan and add 1% sodium hydroxide solution... 500 mL of acetic acid solution was stirred at 60 °C until completely dissolved to obtain a chitosan solution. The above nanocellulose dispersion was slowly added to the chitosan solution at a mass fraction of 3%-8%, and stirred at 50 °C for 30 min. Simultaneously, 0.5 g of polyethylene glycol 400 was added as a plasticizer, and stirring continued for 15 min to obtain a uniform chitosan-nanocellulose composite coating liquid. This composite coating liquid was then uniformly coated onto the surface of the jewelry base component with a deposited titanium nitride-silver composite coating using a coating machine. The wet film thickness was controlled, and the coating was dried at 60 °C for 2 h to finally form a bio-based anti-corrosion coating with a dry film thickness of 10-30 μm.

[0038] Preparation Example 2

[0039] The only difference from the preparation example is that seaweed fiber is used instead of dried wood fiber.

[0040] Preparation Example 3

[0041] The preparation method of phase change energy storage microspheres is as follows:

[0042] Take n-alkane paraffin with a phase transition temperature of 28-32℃. You can use n-eicosane and n-docosahexanes mixed in a 3:1 mass ratio. Weigh 50g of this paraffin, add 5g of the emulsifier sorbitol monostearate, and then add 200mL of deionized water. Stir at 1500r / min for 30min at 70℃ to form a stable paraffin emulsion. Take 15g of urea, add 30mL of 37% formaldehyde solution, adjust the pH to 8.5, and stir at 60℃ for 30min to prepare urea-formaldehyde resin. Cool the above paraffin emulsion to 55℃. Urea-formaldehyde resin was slowly added dropwise while adjusting the pH to 4.0. The mixture was stirred at 1000 rpm for 2 hours to allow the urea-formaldehyde resin to polymerize on the surface of the paraffin droplets to form a wall material. The temperature was then raised to 65°C and stirred for 1 hour to cure the wall material. After cooling to room temperature, 0.1 g of sodium dodecylbenzenesulfonate was added as a dispersant and stirred for 10 minutes. The mixture was then centrifuged at 3000 rpm for 10 minutes, washed three times with deionized water, and vacuum dried at 50°C for 4 hours. Phase change energy storage microspheres with a particle size of 5-25 μm and a wall thickness of 1-3 μm were obtained by screening.

[0043] Preparation Example 4

[0044] The preparation method of the microencapsulated curing agent is as follows:

[0045] Take 30g of epoxy resin curing agent 4,4'-diaminodiphenylmethane, add 2g of co-emulsifier cetyl alcohol, add 150mL of deionized water, and stir at 1200r / min for 20min at 50℃ to form a curing agent emulsion; take 12g of urea, add 25mL of 37% formaldehyde solution, adjust the pH to 8.0, and stir at 55℃ for 25min to prepare urea-formaldehyde resin; maintain the temperature of the curing agent emulsion at 50℃, slowly add the urea-formaldehyde resin, and adjust... Adjust the pH to 3.8 and stir at 800 r / min for 1.5 h to polymerize urea-formaldehyde resin on the surface of the curing agent droplets; heat to 60℃ and stir for 1 h to promote wall material curing; after cooling, add 0.08 g of polyvinyl alcohol as a stabilizer, stir for 10 min, centrifuge at 2500 r / min for 8 min, wash with deionized water until neutral, vacuum dry at 45℃ for 3 h, and screen to obtain microencapsulated curing agents with a wall thickness of 1-3 μm.

[0046] The following are the main raw materials and reagents used in the preparation examples, embodiments, and comparative examples, and their sources and specifications are as follows; unless otherwise specified, all reagents are commercially available analytical grade or higher products:

[0047] 1. Chitosan was purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: S11064;

[0048] 2. Polyethylene glycol 400 was purchased from Jinan Jinhao Chemical Co., Ltd., item number: 20191214;

[0049] 3. n-Eicosane was purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: B27063;

[0050] 4. n-Octadecane was purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: B67405;

[0051] 5. Urea-formaldehyde resin was purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: T25354;

[0052] 6. Sodium dodecylbenzenesulfonate was purchased from Shanghai Yuanye Biotechnology Co., Ltd., product number: S15014;

[0053] 7. 4,4'-Diaminodiphenylmethane was purchased from Wuhan Beiguofeng Chemical Co., Ltd., brand: Hubei Beiguofeng;

[0054] 8. Bisphenol A type epoxy resin was purchased from Hubei Xinkang Pharmaceutical Chemical Co., Ltd., item number: XK3999.

[0055] Example 1

[0056] This application provides a manufacturing process for jade hair ornaments, including the following steps:

[0057] S1. Jade Selection and Screening: Select natural jade scraps as raw materials, and then screen out jade materials with uniform internal structure and a thickness range of 5.85mm.

[0058] Among them, the jade scraps are jasper, and their water content by mass percentage is less than 0.5%;

[0059] S2. Jade Pretreatment and Nano-Strengthening: The screened jade undergoes a two-step cleaning process. First, it is cleaned in an ultrasonic environment, and then treated in a plasma atmosphere. Subsequently, a combination of precision cutting and hand carving is used to process the jade into various shapes and carve various patterns. A silicon dioxide nano-layer is formed on the surface of the formed jade using chemical vapor deposition.

[0060] The ultrasonic cleaning process involved a frequency of 40 kHz, a cleaning temperature of 30 ℃, and a cleaning time of 10 minutes. The plasma treatment was carried out in an argon atmosphere with a processing power of 350 W and a processing time of 120 s. The chemical vapor deposition process used tetraethoxysilane as a precursor, nitrogen as the carrier gas, a gas flow rate of 300 mL / min, a deposition thickness of 125 nm, and a reaction temperature of 400 ℃.

[0061] S3. Activation of microstructure on jade surface: Pulsed laser etching is used on the jade bonding surface to control the surface roughness to Ra 1.3 μm; the wavelength of the pulsed laser is 1064 nm, the pulse frequency is 30 kHz, and the energy density is 10 J / cm³. 2 ;

[0062] S4. Preparation of basic jewelry components and composite coating: Clamping components are made of metal materials through metal injection molding process, and a composite coating of titanium nitride and silver is deposited on its surface.

[0063] The metal material is iron-based, and the thickness of the basic jewelry component is 1.2 mm; the composite coating contains 10% silver by mass and has a coating thickness of 5 μm; the feed composition of the metal injection molding process is 88.5% metal powder and 11.5% polymer binder.

[0064] S5. Bio-based coating on metal surface: Apply a bio-based anti-corrosion coating on top of the composite coating;

[0065] The bio-based anti-corrosion coating is composed of chitosan and nanocellulose, with the nanocellulose having a mass fraction of 5.5% and being derived from wood fibers. The dry film thickness of the coating is 20μm.

[0066] S6. Micro-dispensing coating: A two-component adhesive composed of modified epoxy resin and microencapsulated curing agent is used, in which phase change energy storage microspheres are dispersed. It is precisely coated onto the activated surface of jade using micro-dispensing technology.

[0067] Among them, the phase change energy storage microspheres have a particle size of 15μm, the core material is paraffin, and the phase change temperature is 30℃; the adhesive viscosity range is 1150mPa·s; the wall material of the microencapsulation curing agent is urea-formaldehyde resin with a wall thickness of 2μm;

[0068] S7. Magnetic field-assisted bonding and pressure: The jade coated with adhesive is aligned and bonded to the basic components of the jewelry in a directional magnetic field while pressure is applied.

[0069] The directional magnetic field strength is 0.55T, the magnetic field direction forms an 82.5° angle with the bonding surface, and it is generated by a permanent magnet array; the pressure is 0.6MPa, and the pressure holding time is 72.5s.

[0070] S8, Stepped curing: First, pre-curing is performed under ultraviolet light, followed by stepped temperature rise for heat curing;

[0071] The wavelength of the ultraviolet light pre-curing was 365nm, and the light intensity was 75mW / cm². 2 The pre-curing time is 90s; the step-by-step heating curing is specifically to raise the temperature from 30℃ to 50℃ at a rate of 2℃ / min, hold for 10min, and then raise it to 75℃ at a rate of 1℃ / min, with a total curing time of 37.5min.

[0072] S9. Multi-layer fine polishing: The combined accessories are sequentially rough polished, fine polished and mirror polished;

[0073] The rough polishing process uses silicon carbide abrasive with a particle size of 20μm; the fine polishing process uses alumina abrasive with a particle size of 7.5μm; and the mirror polishing process uses diamond suspension with a particle size of 1.25μm.

[0074] S10. Comprehensive quality inspection: Conduct appearance quality inspection and bonding strength test on the finished product.

[0075] Example 2

[0076] This application provides a manufacturing process for jade hair ornaments, including the following steps:

[0077] S1. Jade Selection and Screening: Select natural jade scraps as raw materials, and then screen out jade materials with uniform internal structure and a thickness range of 1.3mm.

[0078] Among them, the jade scraps are Xiuyan jade, and their water content by mass percentage is less than 0.5%;

[0079] S2. Jade Pretreatment and Nano-Strengthening: The screened jade undergoes a two-step cleaning process. First, it is cleaned in an ultrasonic environment, and then treated in a plasma atmosphere. Subsequently, a combination of precision cutting and hand carving is used to process the jade into various shapes and carve various patterns. A silicon dioxide nano-layer is formed on the surface of the formed jade using chemical vapor deposition.

[0080] The ultrasonic cleaning process involved a frequency of 40 kHz, a cleaning temperature of 20 ℃, and a cleaning time of 5 minutes. The plasma treatment was carried out in an argon atmosphere with a power of 200 W and a treatment time of 60 s. The chemical vapor deposition process used tetraethoxysilane as a precursor, nitrogen as the carrier gas, a gas flow rate of 100 mL / min, a deposition thickness of 50 nm, and a reaction temperature of 350 ℃.

[0081] S3. Activation of microstructure on jade surface: Pulsed laser is used to etch the jade bonding surface to control the surface roughness at Ra0.8μm;

[0082] The pulsed laser has a wavelength of 1064 nm, a pulse frequency of 10 kHz, and an energy density of 5 J / cm². 2 ;

[0083] S4. Preparation of basic jewelry components and composite coating: Clamping components are made of metal materials through metal injection molding process, and a composite coating of titanium nitride and silver is deposited on its surface.

[0084] The metal material is titanium alloy, and the thickness of the basic jewelry component is 0.6 mm; the mass percentage of silver in the composite coating is 5%, and the coating thickness is 2 μm; the feed composition of the metal injection molding process is 85% metal powder and 15% polymer binder.

[0085] S5. Bio-based coating on metal surface: Apply a bio-based anti-corrosion coating on top of the composite coating;

[0086] The bio-based anti-corrosion coating is composed of chitosan and nanocellulose, with the nanocellulose having a mass fraction of 3% and being derived from wood fiber. The dry film thickness of the coating is 10μm.

[0087] S6. Micro-dispensing coating: A two-component adhesive composed of modified epoxy resin and microencapsulated curing agent is used, in which phase change energy storage microspheres are dispersed. It is precisely coated onto the activated surface of jade using micro-dispensing technology.

[0088] Among them, the phase change energy storage microspheres have a particle size of 5μm, the core material is paraffin, and the phase change temperature is 28℃; the adhesive viscosity range is 800mPa·s; the wall material of the microencapsulation curing agent is urea-formaldehyde resin with a wall thickness of 1μm;

[0089] S7. Magnetic field-assisted bonding and pressure: The jade coated with adhesive is aligned and bonded to the basic components of the jewelry in a directional magnetic field while pressure is applied.

[0090] The directional magnetic field strength is 0.3T, the magnetic field direction is at a 75° angle with the interface, and it is generated by an electromagnet system; the pressure is 0.3MPa, and the pressure is maintained for 45s.

[0091] S8, Stepped curing: First, pre-curing is performed under ultraviolet light, followed by stepped temperature rise for heat curing;

[0092] The wavelength of the ultraviolet light pre-curing was 365nm, and the light intensity was 50mW / cm². 2 The pre-curing time is 60 seconds;

[0093] Specifically, the stepped heating thermosetting process involves raising the temperature from 30°C to 50°C at a rate of 2°C / min, holding it at that temperature for 10 minutes, and then raising it to 75°C at a rate of 1°C / min, with a total curing time of 25 minutes.

[0094] S9. Multi-layer fine polishing: The combined accessories are sequentially rough polished, fine polished and mirror polished;

[0095] The rough polishing process uses silicon carbide abrasive with a particle size of 15μm; the fine polishing process uses alumina abrasive with a particle size of 5μm; and the mirror polishing process uses diamond suspension with a particle size of 0.5μm.

[0096] S10. Comprehensive quality inspection: Conduct appearance quality inspection and bonding strength test on the finished product.

[0097] Example 3

[0098] This application provides a manufacturing process for jade hair ornaments, including the following steps:

[0099] S1. Jade Selection and Screening: Select natural jade scraps as raw materials, and then screen out jade materials with uniform internal structure and a thickness range of 10.3mm.

[0100] Among them, the jade scraps are Dushan jade, and their water content by mass percentage is less than 0.5%;

[0101] S2. Jade Pretreatment and Nano-Strengthening: The screened jade undergoes a two-step cleaning process. First, it is cleaned in an ultrasonic environment, and then treated in a plasma atmosphere. Subsequently, a combination of precision cutting and hand carving is used to process the jade into various shapes and carve various patterns. A silicon dioxide nano-layer is formed on the surface of the formed jade using chemical vapor deposition.

[0102] The ultrasonic cleaning process involved a frequency of 40 kHz, a cleaning temperature of 40 ℃, and a cleaning time of 15 minutes. The plasma treatment was carried out in an argon atmosphere with a power of 500 W and a treatment time of 180 s. The chemical vapor deposition process used tetraethoxysilane as a precursor, nitrogen as the carrier gas, a gas flow rate of 500 mL / min, a deposition thickness of 200 nm, and a reaction temperature of 450 ℃.

[0103] S3. Activation of microstructure on jade surface: Pulsed laser etching is used on the jade bonding surface to control the surface roughness to Ra 1.8 μm; the wavelength of the pulsed laser is 1064 nm, the pulse frequency is 50 kHz, and the energy density is 15 J / cm². 2 ;

[0104] S4. Preparation of basic jewelry components and composite coating: Clamping components are made of metal materials through metal injection molding process, and a composite coating of titanium nitride and silver is deposited on its surface.

[0105] The metal material is iron-based, and the thickness of the basic jewelry component is 1.8 mm; the composite coating contains 15% silver by mass and has a coating thickness of 8 μm; the feed composition of the metal injection molding process is 92% metal powder and 8% polymer binder.

[0106] S5. Bio-based coating on metal surface: Apply a bio-based anti-corrosion coating on top of the composite coating;

[0107] The bio-based anti-corrosion coating is composed of chitosan and nanocellulose, with the nanocellulose having a mass fraction of 8% and being derived from seaweed fiber. The dry film thickness of the coating is 30μm.

[0108] S6. Micro-dispensing coating: A two-component adhesive composed of modified epoxy resin and microencapsulated curing agent is used, in which phase change energy storage microspheres are dispersed. It is precisely coated onto the activated surface of jade using micro-dispensing technology.

[0109] Among them, the phase change energy storage microspheres have a particle size of 25μm, the core material is paraffin, and the phase change temperature is 32℃; the adhesive viscosity range is 1500mPa·s; the wall material of the microencapsulation curing agent is urea-formaldehyde resin with a wall thickness of 3μm;

[0110] S7. Magnetic field-assisted bonding and pressure: The jade coated with adhesive is aligned and bonded to the basic components of the jewelry in a directional magnetic field while pressure is applied.

[0111] The directional magnetic field strength is 0.8T, the magnetic field direction is at a 90° angle with the bonding surface, and it is generated by a permanent magnet array; the pressure is 0.9MPa, and the pressure holding time is 100s.

[0112] S8, Stepped curing: First, pre-curing is performed under ultraviolet light, followed by stepped temperature rise for heat curing;

[0113] The wavelength of the ultraviolet light pre-curing was 365nm, and the light intensity was 100mW / cm². 2 The pre-curing time is 120 seconds;

[0114] Specifically, the stepped heating thermosetting process involves raising the temperature from 30°C to 50°C at a rate of 2°C / min, holding it at that temperature for 10 minutes, and then raising it to 75°C at a rate of 1°C / min, with a total curing time of 50 minutes.

[0115] S9. Multi-layer fine polishing: The combined accessories are sequentially rough polished, fine polished and mirror polished;

[0116] The rough polishing process uses silicon carbide abrasive with a particle size of 25μm; the fine polishing process uses alumina abrasive with a particle size of 10μm; and the mirror polishing process uses diamond suspension with a particle size of 2μm.

[0117] S10. Comprehensive quality inspection: Conduct appearance quality inspection and bonding strength test on the finished product.

[0118] Example 4

[0119] The only difference between this embodiment and Embodiment 1 is in steps S4 and S5:

[0120] S4. Preparation of basic jewelry components and composite coating: Basic jewelry components are made of ABS plastic by injection molding process with a melt temperature of 210℃ and an injection pressure of 100MPa; then an epoxy resin primer is sprayed on its surface with a wet film thickness of 20μm and cured at 60℃ for 15 minutes.

[0121] S5. Bio-based coating on the surface of basic jewelry components: A bio-based anti-corrosion coating is applied on top of the primer coating; wherein the composition and preparation of the bio-based anti-corrosion coating are the same as in Example 1.

[0122] Example 5

[0123] The only difference between this embodiment and Embodiment 1 is in steps S4 and S5:

[0124] S4. Preparation of basic jewelry components and composite coating: Basic jewelry components are made by cutting and sewing silk fabric materials, and are pre-treated with argon atmosphere plasma activation at a power of 200W for 60s. Then, a polyurethane primer is dipped onto the surface, with a wet film thickness of 30μm, and cured at 80℃ for 10 minutes.

[0125] S5. Bio-based coating on the surface of basic jewelry components: A bio-based anti-corrosion coating is applied on top of the primer coating; wherein the composition and preparation of the bio-based anti-corrosion coating are the same as in Example 1.

[0126] Comparative Example 1: The only difference between this comparative example and Example 1 is that the application of the bio-based anti-corrosion coating is omitted in step S5. That is, after depositing the composite coating of titanium nitride and silver on the base component of the jewelry, the subsequent adhesive coating step is performed directly.

[0127] Comparative Example 2: The only difference between this comparative example and Example 1 is that in step S4, the composite coating is a pure titanium nitride coating without the addition of silver. That is, the composite coating of titanium nitride and silver is replaced with a titanium nitride coating, while other parameters remain unchanged.

[0128] Comparative Example 3: The only difference between this comparative example and Example 1 is that, in step S6, phase change energy storage microspheres are not added to the adhesive. That is, a two-component adhesive consisting of a modified epoxy resin without phase change energy storage microspheres and a microencapsulation curing agent is used.

[0129] Comparative Example 4: The only difference between this comparative example and Example 1 is that in step S5, the bio-based anti-corrosion coating is composed only of chitosan solution and no nanocellulose is added.

[0130] Comparative Example 5: The only difference between this comparative example and Example 1 is that the steps of "further treatment in a plasma atmosphere" and "forming a silicon dioxide nanolayer on the cutting surface using chemical vapor deposition" are omitted in step S2. That is, after ultrasonic cleaning, cutting is performed directly without plasma activation and chemical vapor deposition.

[0131] Comparative Example 6: The only difference between this comparative example and Example 1 is that in step S8, instead of using UV pre-curing and stepped temperature rise heat curing, a single constant temperature curing process is used: direct curing at 75°C for 37.5 minutes.

[0132] Comparative Example 7: The only difference between this comparative example and Example 4 is that the step of spraying an epoxy resin primer is omitted in step S4. That is, after the plastic part is injection molded, step S5 is directly performed to apply the bio-based anti-corrosion coating.

[0133] Comparative Example 8: The only difference between this comparative example and Example 5 is that the plasma activation and polyurethane primer dipping steps are omitted in step S4. That is, after the fabric parts are cut and sewn, step S5 is performed directly to apply the bio-based anti-corrosion coating.

[0134] I. Bond Strength and Interface Durability Test

[0135] Five finished products from each of Examples 1-5 and Comparative Examples 1-8 were selected as test samples. Each sample was uniformly processed into a standard specimen with a "jade-metal" bonding surface area of ​​15mm × 15mm. Before testing, all specimens were placed in a standard environment of 25℃ and 50% relative humidity for 24 hours to eliminate the influence of ambient temperature and humidity on material properties.

[0136] The experiment used a universal testing machine with a range of 0-5 kN and an accuracy of 0.01 N to perform tensile shear strength tests. The specimen was fixed in a custom-made fixture, and 3 mm thick soft rubber pads were added to the contact points between the fixture and the jade and metal to prevent damage to the jade substrate during force application. The fixture's positioning accuracy was also ensured, guaranteeing that the force direction was strictly perpendicular to the interface. The loading rate was set to 1 mm / min, and tensile force was applied uniformly until the specimen's interface failed. The maximum load before failure was recorded in real time, and the shear strength was calculated using the following formula: After the test, the morphology of the failure interface was observed using an optical microscope with a magnification of 100x. Three failure modes were distinguished: adhesive cohesive failure, interface failure, and substrate failure. Adhesive cohesive failure means that the fracture occurs inside the adhesive, interface failure means that the fracture occurs at the interface between the jade and the adhesive or the metal and the adhesive, and substrate failure means that the fracture occurs within the jade or metal itself. The proportion of each failure mode was statistically analyzed, and the initial bonding performance and interface reliability were comprehensively evaluated in combination with the shear strength value. The higher the shear strength and the lower the proportion of interface failure, the better the interface bonding durability.

[0137] II. Accelerated Corrosion and Environmental Aging Tests

[0138] Five finished products from each of Examples 1-5 and Comparative Examples 1-8 were selected as test samples. Each sample was uniformly processed into a standard specimen with a "jade-metal" bonding surface area of ​​15mm × 15mm. Before testing, all specimens were placed in a standard environment of 25℃ and 50% relative humidity for 24 hours to eliminate the influence of ambient temperature and humidity on material properties.

[0139] The experiment was conducted according to GB / T10125-2021 "Artificial Atmosphere Corrosion Test - Salt Spray Test". A 5% sodium chloride solution was prepared, and the samples were fixed in the sample rack of the salt spray test chamber at a 15° angle to the vertical to ensure uniform salt spray coverage. The chamber temperature was kept constant at 35℃, and the salt spray deposition was controlled at 1-2 mL / (h·80cm²). Continuous spraying was performed for 1000 hours. During the test, samples were removed every 24 hours and observed under standard illumination of 500 lux. The presence of rust, blistering, or peeling on the metal coating was recorded, as well as the presence of corrosion products penetrating the jade-metal interface. The percentage of corrosion area on the metal surface was measured using graph paper. The adhesion of the metal coating was tested according to GB / T9286-1998 "Paints and Varnishes Cross-Cut Test", with a cross-cut spacing of 1 mm and a depth to the metal substrate. The coating peeling level was recorded. After the test, the sample was rinsed with deionized water to remove residual salt spray, and then left to stand for 24 hours in the standard environment of Experiment 1. Tensile shear strength tests were then performed according to the method in Experiment 1, and the bond strength retention rate was calculated to quantify the impact of the corrosive environment on the product's structural stability. The calculation formula is as follows:

[0140]

[0141] III. Thermal Cycling Shock and Fatigue Resistance Testing

[0142] Five finished products from each of Examples 1-5 and Comparative Examples 1-8 were selected as test samples. Each sample was uniformly processed into a standard specimen with a "jade-metal" bonding surface area of ​​15mm × 15mm. Before testing, all specimens were placed in a standard environment of 25℃ and 50% relative humidity for 24 hours to eliminate the influence of ambient temperature and humidity on material properties.

[0143] The experiment used a high and low temperature alternating test chamber to perform thermal cycling tests. Each cycle consisted of the following steps: first, holding at a low temperature of -20℃±2℃ for 30 minutes, then increasing the temperature at a rate of 5℃ / min to a high temperature of 85℃±2℃ within 5 minutes and holding for 30 minutes. The total duration of a single cycle was 65 minutes, and all samples underwent 50 cycles consecutively. After the thermal cycling was completed, the samples were transferred to the standard environment of Experiment 1 and left to stand for 24 hours until the temperature had fully recovered. Three evaluations were then conducted: first, a visual inspection, observing under standard lighting whether the jade showed signs of chipping or cracking, whether the basic components of the jewelry were deformed, and whether there were any peeling gaps at the joint interface; second, a tensile shear strength test, using the method from Experiment 1 to obtain the shear strength after thermal fatigue and calculating the strength retention rate using the following formula: Thirdly, microscopic interface analysis is conducted. A scanning electron microscope with 200x magnification is used to observe the bonding interface and record the presence of damage such as microcracks and adhesive aging and shrinkage. By combining the strength retention rate and the state of microscopic damage, the product's interfacial stress resistance under temperature shock and its long-term service reliability are comprehensively assessed.

[0144] The test data of bonding strength and interface durability of Examples 1-5 and Comparative Examples 1-8 are shown in Table 1.

[0145] Table 1:

[0146]

[0147] The accelerated corrosion and environmental aging test data of Examples 1-5 and Comparative Examples 1-8 are shown in Table 2.

[0148] Table 2:

[0149]

[0150]

[0151] The thermal cycling shock and fatigue resistance test data of Examples 1-5 and Comparative Examples 1-8 are shown in Table 3.

[0152] Table 3:

[0153]

[0154]

[0155] After the thermal cycling impact test, all samples showed no chipping or cracking of the jade and no deformation of the metal. Only Comparative Examples 5 and 6 showed minor gaps at the interface. Regarding microscopic interface damage, Examples 1-3 and Comparative Example 3 showed no obvious microcracks under a 200x scanning electron microscope, and the adhesive was tightly bonded to the substrate. Comparative Examples 1 and 2 showed no obvious microcracks at the interface, but the bonding tightness was slightly inferior to that of the Examples. Comparative Example 4 showed obvious microcracks in some areas and poor bonding. Comparative Example 5 had large-area microcracks and local detachment. Comparative Example 6 had local microcracks and slight aging and shrinkage of the adhesive.

[0156] Data Explanation:

[0157] All test data are the average ± standard deviation of 5 parallel samples, meeting the requirements for experimental repeatability. The adhesion grade of the metal coating is based on GB / T9286-1998, where Grade 1 represents no coating peeling, which is the best condition; Grade 3 represents local peeling at the coating edge; Grade 4 represents large-area peeling of the coating, which is a poor condition; and Grade 5 represents large-area peeling of the coating, which is the worst condition. Microscopic interface damage is observed by 200x scanning electron microscopy. "No obvious microcracks" indicates that the interface structure is intact; "local microcracks" indicates that the crack length is <50μm and the number is <3; and "large-area microcracks" indicates that the crack length is >100μm or the number is >5.

[0158] As can be seen from Examples 1-3, Comparative Example 1, and Tables 1-3, the bio-based anti-corrosion coating is the key to the product's corrosion resistance and long-term bonding stability. It works synergistically with the titanium nitride-silver composite coating to form a protective barrier and reduce the erosion of corrosive media. Without it, the metal surface is prone to corrosion, the coating adhesion decreases, and the overall stability is compromised.

[0159] Based on Examples 1-3 and Comparative Example 2 and Tables 1-3, it can be seen that the silver component in the composite coating works synergistically with titanium nitride to improve the coating's density and corrosion resistance, and hinder the penetration of corrosive media; the lack of silver reduces the coating's protective performance, thereby affecting the bonding stability and interface reliability after thermal cycling.

[0160] Based on Examples 1-3 and Comparative Example 3 and Tables 1-3, it can be seen that the phase change energy storage microspheres in the adhesive can alleviate temperature stress and reduce adhesive aging and cracking through phase change heat absorption and release; if they are missing, the strength retention rate and micro-interface stability after thermal cycling will decrease, and the impact on initial bonding strength and short-term corrosion resistance will be small.

[0161] Based on Examples 1-3, Comparative Example 4, and Tables 1-3, it can be seen that the nanocellulose and chitosan in the bio-based anticorrosive coating synergistically enhance the mechanical properties and density of the coating and prolong the penetration path of corrosive media; without nanocellulose, the coating is easily damaged, and the protective effect and bonding stability after corrosion and thermal cycling are greatly reduced.

[0162] Based on Examples 1-3, Comparative Example 5, and Tables 1-3, it can be seen that plasma treatment and silica nanolayers in jade pretreatment are the core of interfacial bonding strength and durability. The former activates the surface, and the latter forms a transition layer. Without these, the jade surface activity is insufficient, the initial bonding strength and environmental resistance are significantly deteriorated, and the interface is prone to damage.

[0163] Based on Examples 1-3, Comparative Example 6, and Tables 1-3, it can be seen that UV pre-curing and stepped temperature-curing synergistically improve the curing quality of the adhesive through "pre-fixation + uniform curing"; using a single constant temperature curing method results in uneven curing, stress defects, and decreased bonding strength and interface stability.

[0164] As can be seen from Examples 4-5, Comparative Example 7, and Tables 1-3, the epoxy resin primer and bio-based coating of the ABS plastic base components work synergistically to enhance bonding strength and block corrosive media; without them, the protective system fails, and the product bonding stability and environmental tolerance decrease significantly.

[0165] As can be seen from Examples 4-5, Comparative Example 8, and Tables 1-3, plasma activation of the fabric base components, in synergy with the polyurethane primer, solves the problem of bonding to the fabric surface and improves the protective system; without these features, the bio-based coating is prone to cracking and peeling, and the product performance deteriorates significantly after corrosion and thermal cycling.

[0166] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A manufacturing process for jade hair ornaments, characterized in that: Includes the following steps: S1. Jade Selection and Screening: Select natural jade scraps of various colors as raw materials, and then screen out jade materials with uniform internal structure, with a thickness range of 1.3-10.3mm. S2. Jade Pretreatment and Nano-Strengthening: The screened jade undergoes a two-step cleaning process. First, it is cleaned in an ultrasonic environment, and then treated in a plasma atmosphere. Subsequently, a combination of precision cutting and hand carving is used to process the jade into various shapes and carve various patterns. A silicon dioxide nano-layer is formed on the surface of the formed jade using chemical vapor deposition. S3. Activation of microstructure on jade surface: Pulsed laser is used to etch the jade bonding surface to control the surface roughness between Ra0.8μm and Ra1.8μm; S4. Preparation of basic jewelry components and composite coating: Basic jewelry components are made using metal, plastic or fabric materials through appropriate molding processes. When the substrate is metal, a composite coating of titanium nitride and silver is deposited on its surface; when the substrate is plastic or fabric, a suitable primer is applied to its surface. S5. Bio-based coating on the surface of basic jewelry components: Apply a bio-based anti-corrosion coating on top of the composite coating; S6. Micro-dispensing coating: A two-component adhesive composed of modified epoxy resin and microencapsulated curing agent is used, in which phase change energy storage microspheres are dispersed. It is precisely coated onto the activated surface of jade using micro-dispensing technology. S7. Magnetic field-assisted bonding and pressure: The jade coated with adhesive is aligned and bonded to the basic components of the jewelry in a directional magnetic field while pressure is applied. S8, Stepped curing: First, pre-curing is performed under ultraviolet light, followed by stepped temperature rise for heat curing; S9. Mirror polishing treatment: The combined accessories are then subjected to rough polishing, fine polishing and mirror polishing in sequence. S10. Comprehensive quality inspection: Conduct appearance quality inspection and bonding strength test on the finished product.

2. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S1, the jade scraps include at least one of jasper, Xiuyan jade, or Dushan jade, and their water content by mass percentage is less than 0.5%.

3. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S2, the ultrasonic cleaning frequency is 40kHz, the cleaning temperature is 20-40℃, and the cleaning time is 5-15 minutes; the plasma treatment is carried out in an argon atmosphere, with a processing power of 200-500W and a processing time of 60-180s; the chemical vapor deposition uses tetraethoxysilane as a precursor, nitrogen as the carrier gas, a gas flow rate of 100-500mL / min, a deposition thickness of 50-200nm, and a reaction temperature of 350-450℃.

4. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S3, the wavelength of the pulsed laser is 1064 nm, the pulse frequency is 10-50 kHz, and the energy density is 5-15 J / cm². 2 .

5. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S4, the thickness of the basic jewelry component is 0.6-1.8 mm; the mass percentage of silver in the composite coating is 5%-15%, and the coating thickness is 2-8 μm; when metal materials are used, they are manufactured by metal injection molding process, with the feed composition being 85%-92% metal powder and 8%-15% polymer binder.

6. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S5, the bio-based anti-corrosion coating is composed of chitosan and nanocellulose, wherein the mass fraction of nanocellulose is 3%-8%, derived from wood fiber or seaweed fiber, and the dry film thickness of the coating is 10-30μm.

7. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S6, the phase change energy storage microspheres have a particle size of 5-25 μm, a core material of paraffin, and a phase change temperature of 28-32℃; the adhesive has a viscosity range of 800-1500 mPa·s; and the microencapsulation curing agent has a wall material of urea-formaldehyde resin with a wall thickness of 1-3 μm.

8. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S7, the directional magnetic field strength is 0.3-0.8T, the magnetic field direction forms an angle of 75-90° with the bonding surface, and is generated by a permanent magnet array or an electromagnet system; the pressure is 0.3-0.9MPa, and the pressure holding time is 45-100s.

9. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S8, the wavelength of the ultraviolet pre-curing is 365nm, and the light intensity is 50-100mW / cm². 2 The pre-curing time is 60-120s; the step-by-step heating curing is specifically to raise the temperature from 30℃ to 50℃ at a rate of 2℃ / min, hold for 10min, and then raise it to 75℃ at a rate of 1℃ / min, with a total curing time of 25-50min.

10. The manufacturing process of a jade hair ornament according to claim 1, characterized in that: In step S9, the coarse polishing uses silicon carbide abrasive with a particle size of 15-25μm, the fine polishing uses alumina abrasive with a particle size of 5-10μm, and the mirror polishing uses diamond suspension with a particle size of 0.5-2μm.

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