Gold embedded transmission part and manufacturing method

Abstract

The invention belongs to the technical field of gold transmission part production, and particularly relates to a gold embedded transmission part and a manufacturing method thereof.The gold embedded transmission part comprises a resin mold formed through 3D printing and a conductive coating film formed on the surface of the resin mold, and a sinking groove of the part is formed in the resin mold; an electroforming structure is formed in a sinking groove in a resin mold, a part structure is formed after the electroforming structure is demolded, and the jewelry structure further comprises a jewelry body used for embedding of the part structure. The photocuring 3D printing and the electroforming technology are organically fused, and integrated manufacturing of the complex embedded transmission part with the nanoscale resolution ratio is creatively achieved. By accurately controlling the resolution ratio of 3D printing, a complex geometric structure with extremely high precision can be constructed, the functionality and integrity of transmission parts on the micron scale are ensured, and the extreme requirement for a mechanical transmission device in high-end jewelry manufacturing is met.

Description

Technical Field

[0001] The invention belongs to the technical field of gold transmission part production, and specifically relates to a gold embedded transmission part and a manufacturing method thereof. Background Art

[0002] Traditional jewelry processing technology usually involves complex mold making and subsequent assembly of transmission parts. These methods are not only cumbersome and time-consuming, but also difficult to achieve high-precision and high-integration embedded transmission parts in small, sophisticated jewelry designs. Embedded transmission parts in jewelry (such as micro gears and bearings) usually require multiple processing steps to complete, which increases production costs and process complexity, and often cannot meet the requirements of modern jewelry design for sophistication and complexity;

[0003] Photocuring 3D printing technology has achieved significant applications in many high-precision fields, but its application in jewelry manufacturing still faces challenges. Especially in the electroforming process of jewelry molds, how to properly surface treat the molds printed with photocuring resin to ensure the uniformity and adhesion of the electroforming layer is still a technical difficulty. The surface conductive treatment and refinement of the resin mold are crucial to the quality of the electroforming effect. Traditional treatment methods are difficult to achieve the required high precision and high quality standards;

[0004] Electroforming technology is mainly used in jewelry manufacturing to improve the hardness and surface gloss of products. However, the existing electroforming technology is still insufficient in combining complex internal structures and high-precision requirements. Especially when it is necessary to embed micro-transmission parts into jewelry designs, how to effectively combine the main structure of electroformed jewelry with internal transmission parts to ensure durability and stability in long-term use is still a technical challenge that needs to be solved. Therefore, the development of innovative electroforming methods and technologies is crucial to improving the quality and functionality of jewelry manufacturing;

[0005] In order to solve the above problems, the present application proposes a gold embedded transmission part and a manufacturing method. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a gold embedded transmission part and a manufacturing method, aiming to realize the integrated precision manufacturing of internal transmission parts of jewelry and reduce the difficult assembly process.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gold embedded transmission part, comprising a resin mold formed by 3D printing and a conductive coating formed on the surface of the resin mold, a sink groove for the part is formed in the resin mold, an electroformed structure is formed in the sink groove in the resin mold, the electroformed structure forms a part structure after demolding, and also includes a jewelry body for embedding the part structure.

[0008] To achieve the above object, the present invention also provides the following technical solution: a method for manufacturing a gold embedded transmission part, comprising the following steps:

[0009] Step 1: Material preparation:

[0010] (1) The viscosity of the photocurable resin is in the range of 200-300 cP (centipoise). The viscosity within this range ensures that the resin has moderate fluidity during the printing process, and will not be too thick to cause printing difficulties, nor will it be too thin to cause blurred printing details. Selecting a resin in this viscosity range will help improve printing speed and printing accuracy, while ensuring the surface smoothness of the printed part.

[0011] (2) The photosensitivity wavelength of the resin is 405nm. This wavelength is suitable for most light-curing 3D printing equipment, ensuring that the resin can effectively absorb ultraviolet light and cure quickly. The 405nm wavelength light source is commonly found in LED light sources or laser curing equipment, which can achieve high-precision curing during the printing process and avoid structural defects caused by incomplete curing.

[0012] Step 2: Light-curing 3D printing mold process:

[0013] (1) XYZ axis resolution during stereolithography 3D printing;

[0014] The XY axis resolution during 3D printing should be controlled at ≤5μm. The higher the resolution, the finer the printed details. This resolution can effectively reproduce the tiny details in the design model, such as the gear teeth of micro gears and the precise structure of embedded transmission parts, ensuring the functionality and aesthetics of the parts. The Z axis resolution should be controlled at ≤10μm. The Z axis resolution affects the thickness of each layer printed and the sense of detail. A smaller Z axis resolution helps to achieve a smoother surface and finer structure, but may affect the printing speed. Therefore, a balance needs to be struck between printing accuracy and efficiency.

[0015] (2) Exposure time for light-curing 3D printing:

[0016] The exposure time of each layer is controlled within 10-15 seconds. This time range can ensure that each layer of resin is fully cured, thereby improving the strength and stability of the printed part. Exposure time that is too long or too short may affect the curing effect, resulting in surface defects or insufficient structural strength of the printed part.

[0017] Step 3: Conductive treatment of mold surface:

[0018] Conductive treatment can be achieved by depositing a conductive coating or applying a conductive spray. When depositing a conductive coating, you can choose conductive silver paint or conductive carbon black paint, and the thickness of the coating should be controlled at 1-5μm to ensure good conductivity. When applying a conductive spray, ensure that the spray is evenly applied to form a conductive film layer with a conductivity of at least 104S / m to ensure good adhesion during the electroforming process.

[0019] Step 4: Electroforming process parameters:

[0020] (1) Composition and temperature of electroforming solution:

[0021] In order to ensure the uniformity and adhesion of the gold layer, the present invention controls the composition of the electroforming solution in detail.

[0022] The concentration of gold ions is 5-10g / L. This concentration range can ensure the uniformity and decorative effect of the gold layer. Too high a concentration may cause the gold layer to be thicker than expected, increasing costs, while too low a concentration may result in poor adhesion of the gold layer. At the same time, the temperature of the electrolyte solution should be controlled at 45-55°C. The appropriate temperature helps to increase the ion migration rate during the electroforming process, improve the uniformity and glossiness of the coating, and reduce gas generation during the electroforming process to avoid negative effects on the quality of the coating;

[0023] (2) Electroforming current density, time and thickness of gold-plated structure:

[0024] The current density of the gold-plated structure is controlled at 0.02-0.05A / dm 2 . The lower current density ensures uniform adhesion of the gold layer and provides a smooth surface effect while reducing surface defects and fluidity issues. The electroforming time is 0.5-1 hour. The time setting should be adjusted according to actual needs to ensure that the thickness of the gold layer is moderate while avoiding the cost increase caused by excessive plating. The thickness of the gold plating structure should be controlled at 1-3μm. This thickness range is sufficient to improve the appearance quality and conductivity of the part without significantly increasing the material cost or affecting the functionality of the part.

[0025] Step 5: Embedding of transmission parts:

[0026] The present invention also considers the embedding problem of transmission parts, especially the precise alignment embedding operation of micro-mechanical parts such as gears and bearings. In order to ensure the accuracy and stability of the transmission system, a microscope is used to assist in the embedding process to ensure the precise alignment of the parts. This operation can effectively avoid the deviation that may occur in the traditional manual embedding process, thereby ensuring the functionality and life of the transmission parts.

[0027] Step 6: Process parameters of secondary electroforming:

[0028] In order to further enhance the durability and bonding strength of the parts, the present invention proposes a secondary electroforming process. By setting the current density to 0.1-0.3A / dm 2 The coating thickness is controlled at 3-5μm, ensuring that the outer layer of the parts has higher strength and wear resistance, while enhancing the bonding force between the parts and the coating.

[0029] Step 7: Finished product post-processing:

[0030] After the electroforming and the parts are embedded in the jewelry body, the finished product needs to be cleaned. In order to ensure the surface cleanliness of the final product and the normal function of the parts, the present invention uses ethanol or deionized water for cleaning, and the cleaning time is controlled within 5-10 minutes. After cleaning, a final inspection is carried out, and the inspection content includes surface smoothness, functionality of transmission parts, and integrity of the jewelry body structure. Ensure that each part meets the design requirements to avoid defects or functional problems in the final product.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention organically integrates photocuring 3D printing and electroforming technology, and pioneered the integrated manufacturing of complex embedded transmission parts with nanometer resolution. By precisely controlling the resolution of 3D printing, extremely high-precision complex geometric structures can be constructed to ensure the functionality and integrity of transmission parts at the micrometer scale, meeting the ultimate requirements for mechanical transmission devices in high-end jewelry manufacturing;

[0033] The flexible control of the electroforming process not only provides excellent mechanical properties (high strength, wear resistance and conductivity) for embedded transmission parts, but also ensures the beauty and surface quality of the parts. This electroforming structure of transmission parts not only enhances the durability of the structure, but also improves the visual effect of the overall jewelry, achieving a seamless integration of functionality and aesthetic design;

[0034] The invention breaks through the traditional step-by-step manufacturing mode of transmission parts and jewelry structures, adopts innovative integrated manufacturing technology, accurately builds complex molds through light-curing 3D printing, and uses electroforming technology to complete the high integration of transmission parts and jewelry bodies without subsequent assembly. This process not only significantly improves production efficiency, but also enhances the bonding strength and service life between the transmission system and the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 It is a schematic diagram of the processing flow of the present invention, wherein:

[0037] a is the 3D digital design model of the processed parts;

[0038] b is light-curing 3D printing;

[0039] c is surface conductive treatment;

[0040] d is the electroforming process;

[0041] e is the part structure obtained after demoulding;

[0042] f is the assembly of the parts structure into the jewelry body.

[0043] In the figure: 1. 3D model; 2. UV light source; 3. Resin mold; 4. Conductive coating; 5. Electroforming structure; 6. Part structure; 7. Jewelry body. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example

[0046] See also Figure 1 The present invention provides the following technical solutions: a gold embedded transmission part, comprising a resin mold 3 formed by 3D printing and a conductive coating 4 formed on the surface of the resin mold 3, a sink groove for the part formed in the resin mold 3, an electroformed structure 5 formed in the sink groove in the resin mold 3, a part structure 6 formed after the electroformed structure 5 is demolded, and also includes a jewelry body 7 for embedding the part structure 6.

[0047] The present invention also provides the following technical solution: a method for manufacturing a gold embedded transmission part, comprising the following steps:

[0048] Step 1: Material preparation;

[0049] In order to manufacture the complex structure of the embedded gear transmission part 6, first select a resin material suitable for light-curing 3D printing with a viscosity of 200-300cP to ensure the fluidity and precision of the material during the printing process. The photosensitivity wavelength of the resin material is 405nm, which is suitable for common light-curing 3D printing equipment. At the same time, prepare the electrolyte solution required for the electroforming process. The gold ion concentration in the electrolyte solution is controlled at 5-10g / L, and the solution temperature is controlled at 45-55C to ensure the uniformity and stability of the coating during the electroforming process.

[0050] Step 2: Gear model design;

[0051] The embedded gear transmission structure 3D model is designed by 3D design software (such as AutoCAD or SolidWorks) 1. The gear module, number of teeth, pressure angle and tooth width and other parameters are accurately calculated according to the transmission requirements to ensure that they can play a role in the microstructure of the jewelry body 7. During the design process, the XY axis resolution is strictly controlled to be ≤5μm and the Z axis resolution is ≤10μm to ensure the integrity of the gear details and its high precision in the transmission process.

[0052] Step 3: Light-curing 3D printing mold;

[0053] The gear resin mold 3 is printed using a light-curing 3D printing device (such as SLA or DLP technology). The exposure time of each layer is controlled at 10-15 seconds to achieve a balance between high resolution and high surface quality. After printing, the mold is secondary cured at 60-80°C for 20-30 minutes to further improve the mechanical strength and durability of the mold.

[0054] Step 4: Mould surface treatment;

[0055] In order to improve the adhesion of the electroforming layer during the electroforming process, the printed gear mold is surface treated. Use sandpaper with a mesh size of 4000 or above to polish the surface to remove the minor unevenness that may remain during the printing process. Subsequently, a conductive coating or conductive plating 4 is used to conduct the mold surface to ensure that it has uniform conductivity and improve the electroforming effect.

[0056] Step 5: Electroforming layer manufacturing;

[0057] In the gold electroforming process, the current density is set at 0.02-0.05A / dm 2 The electroforming time is 25-50 hours, and finally an electroforming structure with a thickness of 50-150μm is formed. The gold plating not only improves the conductivity of the gear parts, but also improves their corrosion resistance and aesthetics, ensuring that they maintain good performance during long-term use.

[0058] Step 7: Embed the gear transmission structure parts;

[0059] Through the microscope-assisted operation, the pre-fabricated gear part structure 6 is accurately embedded into the microstructure of the jewelry body 7. The installation of the gear requires precise alignment to ensure that the gear does not get stuck during operation and the transmission is smooth. This embedding process requires extremely high operating precision to avoid excessive friction or position deviation between gears and ensure the efficient operation of the entire transmission system.

[0060] Step 8: Secondary electroforming to strengthen bonding;

[0061] After the gear transmission structure is embedded in the jewelry body 7, the secondary electroforming process is carried out. The current density is the same as the first electroforming, maintained at 0.1-0.3A / dm 2 The electroforming thickness is 3-5μm to ensure that the combination of the gear part structure 6 and the jewelry structure is tighter, providing additional durability and mechanical strength. The secondary electroforming process significantly improves the bonding strength between the gear part structure 6 and the jewelry body 7, ensuring that the transmission parts will not loosen during long-term use.

[0062] Step 9: Post-processing and finished product inspection;

[0063] After electroforming, the finished product is immersed in ethanol or deionized water for 5-10 minutes of surface cleaning to remove impurities that may remain during the electroforming process and ensure that the surface is smooth and flawless. After cleaning, functional testing and microscopic observation are performed to ensure that the embedded gear part structure 6 can operate normally without transmission jamming or wear. Finally, the finished product has a good appearance and excellent functionality.

[0064] Through the above integrated manufacturing process, the manufactured internal gear transmission structure part 6 has high precision, high strength and high aesthetics, and is suitable for the complex mechanical transmission requirements of high-end jewelry. The combination of light-curing 3D printing and electroforming technology has greatly improved production efficiency and part quality, while reducing the assembly difficulty and error accumulation in traditional processing technology.

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gold embedded transmission part, characterized in that: The invention comprises a resin mold (3) formed by 3D printing and a conductive coating (4) formed on the surface of the resin mold (3); a sink groove for a part is formed in the resin mold (3); an electroformed structure (5) is formed in the sink groove in the resin mold (3); the electroformed structure (5) forms a part structure (6) after demoulding; and a jewelry body (7) is also included for embedding the part structure (6).

2. A method for manufacturing a gold embedded transmission part, characterized in that: The steps include: S1. Use light-curable 3D printing resin materials with a viscosity range of 200-300cP to ensure that the printing material has suitable fluidity; the electrolyte solution used for electroforming contains gold ions; S2. Design jewelry and embedded transmission parts models using 3D design software, with XY axis resolution ≤ 5μm and Z axis resolution ≤ 10μm; S3. Print the transmission parts mold using a light-curing 3D printing device with an exposure time of 10-15 seconds per layer. After printing, the mold is secondary cured at 60-80°C for 20-30 minutes; S4. Conductively treat the polished mold to improve the electroforming adhesion of the mold. The conductive treatment method may be depositing a conductive coating or applying a conductive spray; S5, placing the conductively treated mold into an electroforming tank for electroforming of the coating. Then, electroforming of the gold coating is performed; S6. After the electroforming coating is completed, the pre-fabricated micro transmission parts are embedded into the jewelry structure with the help of a microscope; S7. After the transmission parts are embedded, the secondary electroforming process is carried out to further strengthen the joint between the transmission parts and the jewelry structure and seal the transmission components. The current density of the secondary electroforming is the same as the first one, and the electroforming thickness is 3-5μm; S8. After electroforming is completed, the surface of the finished product is cleaned using ethanol or deionized water, and the cleaning time is controlled within 5-10 minutes.

3. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The viscosity of the light-curable 3D printing resin is 200-300 cP, and the photosensitivity wavelength is 405 nm.

4. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The XY axis resolution during 3D printing is ≤5μm, the Z axis resolution is ≤10μm, and the exposure time is 10-15 seconds / layer.

5. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The mold surface treatment includes grinding with sandpaper of 4000 mesh or above, and conducting conductive treatment on the polished mold to ensure that the surface has good conductivity.

6. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The concentration of gold ions in the electroforming solution is 5-10 g / L, and the temperature of the electroforming solution is controlled at 45-55°C.

7. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The current density of the gold plating layer is controlled at 0.02-0.05A / dm 2 , the electroforming time is 25-50 hours, and the thickness of the gold plating is 50-150μm.

8. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: Transmission parts are micro-mechanical parts and need to be precisely aligned and embedded under a microscope to ensure their accurate position and avoid transmission jamming or excessive friction.

9. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: The current density of the secondary electroforming process is 0.1-0.3A / dm 2 , the coating thickness is 3-5μm.

10. The method for manufacturing a gold-embedded transmission part according to claim 2, characterized in that: In the post-processing step of the finished product, ethanol or deionized water is used for cleaning for 5-10 minutes to ensure the surface is clean and the parts function properly.

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