Design method and additive manufacturing method of cloisonne enamel imitating line drawing technique

Abstract

The invention discloses a design method and an additive manufacturing method of cloisonne enamel by imitating a line drawing technique, and relates to the technical field of enamel design, and the design method comprises the following steps: designing a cloisonne enamel matrix model by using computer-aided software; wherein the carcass model comprises a carcass bottom and a filigree; according to a line modeling method in the line drawing art, carrying out line treatment on the filigree silk thread by using thickness, density, strength and virtual-real techniques; and after the wire inlay is subjected to line processing, outputting the carcass model file in an STL format. According to the design method disclosed by the invention, a cloisonne enamel design scheme is created by applying computer-aided software based on a method for sketching an object image by an ink line in a line drawing technique. By adjusting the expression form of the wire inlay line, the artistic effects of virtuality, compactness, strength and the like of the ink line in the line drawing art are truly simulated, the stylized and mechanical engraving pattern of the traditional wire inlay line is changed, and the obvious artistic effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a design method and an additive manufacturing method for cloisonné enamel using the imitation white-drawing technique. Background Art

[0002] Cloisonné enamel is an object that is made by pinching metal wire into various patterns, welding them to a corresponding metal base, and then filling the patterns with enamel glaze and firing them.

[0003] The Chinese invention patent with the publication number CN117284019A discloses a method for manufacturing three-dimensional cloisonné enamel. The manufacturing method performs a form-fitting design on the cloisonné according to the angle between the cloisonné and the vertical direction, so that the angle between the cloisonné and the vertical direction changes with the body surface. The form-fitting design minimizes the support contact points required for the cloisonné to avoid damage to the cloisonné by subsequent support removal. The cloisonné that needs to add support in the cloisonné enamel is counted by slicing software, and the angle of contact between the cloisonné and the body bottom is optimized to ensure that the cloisonné pattern remains unchanged. The design of the traditional cloisonné perpendicular to the body surface is changed to realize the form-fitting design of the oblique cloisonné, and a three-dimensional cloisonné enamel body model that meets the design is established for integrated printing. The manufacturing method can realize the integrated direct forming of the enamel body bottom and the cloisonné of the three-dimensional complex structure, solves the problem of complex process in the cloisonné enamel process, ensures the integrity of the silk thread, improves work efficiency, reduces labor costs, and can manufacture thin-walled enamel.

[0004] However, the above-mentioned wire-pinching process generally requires craftsmen to use tweezers and other tools to bend the prepared metal wire according to the design pattern. Manual bends require craftsmen to have exquisite craftsmanship, skilled tool use, and accurate grasp of the design intention of the pattern. This often leads to mistakes and errors in the manual wire-pinching process for ordinary craftsmen.

[0005] In addition, there are two main methods of wire making: machine wire making and hand wire drawing. The metal wires produced by the two methods are mainly flat wires with rectangular cross-sections. Since the size standards of each wire must be unified, it is necessary to produce metal wires of various specifications and sizes to adapt to different sizes of carcasses. This traditional wire making process is complicated, time-consuming and labor-intensive, and the metal wires produced also present a stereotyped and mechanized expression. The metal wires prepared by this method are mainly responsible for isolating glazes, preventing glazes from mixing and flowing, and avoiding glaze disintegration in the enamel process. The rigid and direct expression cannot truly integrate with the design and lacks artistry. Summary of the invention

[0006] In view of this, the main purpose of the present invention is to propose a design method and an additive manufacturing method for cloisonné enamel imitating the white-drawing technique to solve the above-mentioned technical problems.

[0007] To achieve the above object, the first object of the present invention is to provide a design method for cloisonné enamel using the imitation line drawing technique, comprising the following steps:

[0008] Step S1: designing a cloisonné enamel body model using computer-aided software; wherein the body model includes a base and cloisonné;

[0009] Step S2: according to the line shaping method in the art of white-line drawing, the lines of the filigree are processed by using the thickness, density, strength, reality and virtuality techniques;

[0010] Step S3: After the filigree is processed, the carcass model file is output in STL format.

[0011] Preferably, in step S2, the specific requirements for applying thickness, density, strength, reality and virtuality techniques to process the wire of the filigree include:

[0012] The contact surface between the filigree and the tire base is not less than 0.5 mm;

[0013] The filigree threads are perpendicular to the tire base;

[0014] Unify the height size range of the filigree;

[0015] The width of the filigree meets the requirements of white-line painting art and filigree pattern design.

[0016] Preferably, the height of the filigree ranges from 0.5 to 0.8 mm, and the width of the filigree ranges from 0.25 to 2 mm.

[0017] Preferably, the computer-aided software is any one of Jewel CAD, Rhino, and 3DMAX.

[0018] The second object of the present invention is to provide an additive manufacturing method for imitating the line drawing technique of cloisonné enamel, using the design method of imitating the line drawing technique of cloisonné enamel as described above, comprising the following steps:

[0019] Input the adjusted carcass model file into the printer for slicing, and print out the initial carcass;

[0020] The printed initial tire body is subjected to a plate-repairing process to obtain a modified tire body;

[0021] Pre-treating the repaired body before firing to obtain a first body;

[0022] The concave area formed by the filigree in the first body is blued to obtain the second body;

[0023] The second body is placed in a furnace for firing to obtain an enamel product;

[0024] The fired enamel products are then subjected to grinding and electroplating treatments in turn.

[0025] Preferably, the plate repair process includes removing support structures, grinding and polishing.

[0026] Preferably, the pretreatment before firing includes annealing, pickling and cleaning.

[0027] Preferably, the specific requirements for blueing the concave area formed by filigree in the first body to obtain the second body, and then putting the second body into the furnace for firing to obtain the enamel product are:

[0028] Use enamel glaze to dot blue, and repeat the blue dot and firing process until the enamel glaze and the surface of the filigree wire reach the same level.

[0029] Preferably, the firing process of placing the second body into a furnace for firing to obtain the enamel product is:

[0030] Raise the temperature of the enamel furnace to 700°~750°, then place the blue-painted body into the enamel furnace and bake for 0.9-1.5 minutes, then take it out and cool it naturally at room temperature.

[0031] Preferably, the activation treatment includes piercing, polishing, brightening and cleaning procedures.

[0032] Compared with the prior art, this application has the following technical effects:

[0033] 1. In the technical solution of the present invention, the design method of the cloisonné enamel using the white-drawing technique includes the following steps: using computer-aided design software to create a body model, the design of the body model takes into account the three-dimensional form, size ratio and cloisonné layout of the work, and in the design process, the design can be quickly modified and iterated to achieve the best artistic effect; computer-aided design improves the accuracy and efficiency of the design, while allowing the creation of more complex patterns; according to the line shaping method in the art of white-drawing painting, the line processing of the cloisonné silk thread is performed using the thickness, density, strength, and virtuality techniques. Drawing on the white-drawing technique, the three-dimensional sense and spatial relationship of the object are expressed by adjusting the thickness of the line; the rhythm and dynamic effect of the picture are created by using the line layout with a good density; the light and shadow effects are expressed by the changes in the strength of the line to enhance the three-dimensional sense of the work; the distance relationship and layering of the object are expressed by using the combination of virtuality and reality to make the picture more vivid; the body model with the completed line processing is converted into the STL (Stereolithography) format for use in the 3D printing manufacturing process. The STL format is a commonly used 3D model file format that describes the surface geometry of the model. After exporting the STL file, you can use additive manufacturing technology to quickly produce a prototype of cloisonné enamel, or use it to guide traditional hand-made production. This step enables the design to be transformed from the digital world into a physical work, providing an accurate model for subsequent cloisonné enamel production. Through the design method of cloisonné enamel that imitates the line drawing technique, cloisonné enamel works can not only show the delicacy and elegance of line drawing art, but also use modern manufacturing technology to improve production efficiency and the fineness of the work. This design method provides new possibilities for the inheritance and development of traditional cloisonné enamel craftsmanship.

[0034] 2. Using computer-aided design software, based on the artistic principle of outlining objects with ink lines in the line drawing technique, create a cloisonné enamel design plan. By adjusting the expression form of the cloisonné lines, the artistic effects of the virtuality, density, strength and weakness of the ink lines in the line drawing art can be truly simulated, and the traditional stylized and mechanized stereotyped style of cloisonné lines can be changed. The shape, charm, light and shadow, color, volume and texture of objects can be expressed through lines. At the same time, through three-dimensional modeling technology, the integrated modeling of the body and cloisonné of the line drawing cloisonné enamel that conforms to the creative design can be achieved, and the additive manufacturing technology can be used for integrated printing; the integrated direct forming of the enamel body with a three-dimensional complex structure of the line drawing cloisonné enamel and the cloisonné can be achieved, which solves the complex technical problems in the traditional metal wire forming process, optimizes the cumbersome process in the cloisonné enamel process, improves work efficiency and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of a flow chart of a design method for cloisonné enamel using the imitation white-drawing technique provided by an embodiment of the present invention;

[0037] Figure 2 It is a line drawing and simulation diagram of traditional cloisonné enamel;

[0038] Figure 3 It is a schematic diagram of the line drawing and digital model design of the cloisonné enamel process that imitates the effect of the white-drawing technique in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] 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.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0041] The weight of the relevant components mentioned in the embodiment description of the present application can not only refer to the specific content of each component, but also represent the proportional relationship between the weights of the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the embodiment description of the present application, it is within the scope disclosed in the embodiment description of the present application. Specifically, the mass described in the embodiment description of the present application can be a mass unit known in the chemical industry such as μg, mg, g, kg, etc.

[0042] See also Figure 2As shown in the figure, in the traditional enamel craft, the wire making process mainly includes machine wire making and hand wire drawing. The metal wires made by the two wire making methods are mainly flat wires with rectangular cross-sections. Since the size standard of each wire must be unified, it is necessary to make metal wires of various specifications and sizes to adapt to different sizes of carcasses. This traditional wire making process is complicated, time-consuming and labor-intensive, and the metal wires produced also show a stereotyped and mechanized expression. The metal wires prepared by this method are mainly responsible for isolating glazes, preventing glazes from mixing and flowing, and avoiding glaze disintegration in the enamel process. The rigid and direct expression cannot be truly integrated with the design and lacks artistry.

[0043] To solve the above technical problems, please refer to Figure 1 As shown, the embodiment of the present invention provides a design method for cloisonné enamel using the imitation line drawing technique, comprising the following steps:

[0044] Step S1: designing a cloisonné enamel body model using computer-aided software; wherein the body model includes a base and cloisonné;

[0045] In this step, computer-aided design software is used to create a carcass model. The design of the carcass model takes into account the three-dimensional form, size ratio and filigree layout of the work. During the design process, the design can be quickly modified and iterated to achieve the best artistic effect. Computer-aided design improves the accuracy and efficiency of the design, while allowing the creation of more complex patterns.

[0046] Step S2: according to the line shaping method in the art of white-line drawing, the lines of the filigree are processed by using the thickness, density, strength, reality and virtuality techniques;

[0047] Drawing on the techniques of line drawing, the three-dimensional sense and spatial relationship of objects are expressed by adjusting the thickness of lines; a dense and sparse layout of lines is used to create a sense of rhythm and dynamic effect in the picture; light and shadow effects are expressed through changes in the strength of lines to enhance the three-dimensional sense of the work; a combination of virtual and real techniques is used to express the distance relationship and layering of objects, making the picture more vivid.

[0048] This step reflects the designer's understanding of line drawing art and his ability to apply the technique, and is a key link in combining traditional art with modern design.

[0049] Step S3: After the filigree is processed, the carcass model file is output in STL format.

[0050] The carcass model with completed lines is converted into STL (Stereolithography) format for use in the 3D printing process. STL format is a commonly used 3D model file format that describes the surface geometry of the model; after outputting the STL file, the prototype of the cloisonné enamel can be quickly produced using additive manufacturing technology, or used to guide traditional hand-made production. This step enables the design to be transformed from the digital world into a physical work, providing an accurate model for subsequent cloisonné enamel production.

[0051] Therefore, through the design method of cloisonné enamel imitating the white-drawing technique, cloisonné enamel works can not only show the delicacy and elegance of white-drawing art, but also use modern manufacturing technology to improve production efficiency and the fineness of the works. This design method provides new possibilities for the inheritance and development of traditional cloisonné enamel craftsmanship.

[0052] In addition, the application of digital modeling software can optimize the silk-making process and its results, and realistically simulate the artistic effects of the virtuality, density, strength, and other aspects of lines in line drawing art, thus changing the stereotyped performance of traditional silk threads. It also combines additive manufacturing (3D printing) technology to achieve rapid prototyping of metal wire threads, and further improves the production efficiency of the silk-making process.

[0053] Furthermore, in step S2, the specific requirements for applying thickness, density, strength, reality and virtuality techniques to process the wire of the filigree include:

[0054] The contact surface between the filigree and the tire base is not less than 0.5 mm;

[0055] This requirement helps to improve the overall quality and aesthetics of cloisonné enamel works due to many considerations such as structural stability, welding strength, adaptability to thermal expansion, prevention of glaze penetration, ease of grinding and polishing, artistic expression and electrical continuity.

[0056] The filigree threads are perpendicular to the tire base;

[0057] The verticality of the silk thread to the base is an important layout principle in the cloisonné enamel process, which has an important impact on ensuring the structural stability, aesthetics, firing quality, and subsequent grinding and polishing of the work. For example, vertical silk threads can provide better support, increase the stability of the overall structure, and reduce deformation caused by gravity or external forces; during the firing process, vertical silk threads help the body and enamel glaze to be heated evenly, reducing cracking or deformation caused by uneven heating; vertically arranged silk threads are visually neater and more symmetrical, enhancing the artistry and aesthetics of the work; vertical silk threads make the blue-dotting process more convenient, and can more accurately control the filling of glaze to ensure uniform distribution of color; in the subsequent grinding and polishing process, vertical silk threads help to evenly remove surface irregularities, making the surface of the finished product smoother; during the high-temperature firing process, vertical silk threads can prevent the glaze from flowing due to gravity, thereby maintaining the accuracy of the design and the clarity of details; vertical silk threads can enhance the three-dimensional sense of the work, making the pattern more vivid and distinct.

[0058] Unify the height size range of the filigree;

[0059] By unifying the height and size range of the cloisonné, the quality and aesthetics of the cloisonné enamel works can be ensured, while also meeting the needs of modern production and realizing the combination of traditional craftsmanship and modern manufacturing technology. For example, a unified height can ensure the structural stability of the cloisonné enamel works and prevent stress concentration or fracture caused by different heights; during the firing process, a unified height helps the enamel glaze to melt and solidify evenly, avoiding uneven firing due to height differences; a unified height of the cloisonné can simplify the subsequent grinding and polishing process, improve production efficiency, and ensure that the surface of the finished product is flat and smooth; a unified size range can simplify the production process, reduce dependence on the individual skills of craftsmen, and facilitate the mechanization or automation of some processes.

[0060] The width of the filigree meets the requirements of white-line painting art and filigree pattern design.

[0061] By precisely controlling the width of the wire, it is possible to ensure that the cloisonné enamel works retain the essence of traditional craftsmanship while meeting the needs of modern art creation, thus achieving a perfect combination of art and technology. For example, the width of the wire directly affects the expressiveness of the lines of the work. The appropriate width can better express the delicacy and layering of the line drawing, making the pattern more vivid and three-dimensional; ensuring that the width of the wire meets the design requirements can make the outline of the pattern clearer, the details more distinct, and enhance the overall artistic effect; the width of the wire needs to take into account the feasibility of actual operation, ensuring that the craftsman can accurately pinch out the design pattern on the body, while ensuring the firmness and durability of the silk thread.

[0062] Furthermore, the height of the filigree ranges from 0.5 to 0.8 mm, and the width of the filigree ranges from 0.25 to 2 mm.

[0063] The height of the filigree needs to take into account the design of the pattern and the need for three-dimensional effect. Filigree with moderate height can better support the enamel glaze, while ensuring that the glaze will not overflow or flow during the firing process.

[0064] As a preferred method of this embodiment, the height size range of the filigree is preferably 0.5 to 0.8 mm. The height size is usually determined by experienced craftsmen based on the design pattern and the thickness of the body. Too high filigree may cause the filling glaze to be too thick, which may cause sagging and unevenness during the firing process, as well as shrinkage and cracking after cooling. Too low filigree may affect the appearance and three-dimensional effect.

[0065] The width of the wire should match the thickness of the pattern. A wire that is too wide may make the whole pattern look bulky, while a wire that is too thin may easily deform or break during the firing process. In addition, the choice of width also needs to take into account the flexibility and strength of the wire to ensure stability during the wire-cutting, welding and firing processes.

[0066] Furthermore, in an embodiment of the present invention, the computer-aided software is any one of Jewel CAD, Rhino, and 3DMAX.

[0067] The design of the cloisonné enamel body model can adopt any one of the three-dimensional digital model software such as Rhino, 3DMAX, and JewelCAD, or other three-dimensional digital model software. The present invention does not impose any restrictions on computer-aided software, and any software that can meet the three-dimensional drawing requirements can be used for the design of the enamel body model.

[0068] In some other embodiments, for example, by adding a functional module related to the imitation white-drawing technique in Jewel CAD software through secondary development, the design efficiency and effect of cloisonné enamel can be further improved.

[0069] In another embodiment of the present invention, when the cloisonné enamel body model designed in the embodiment of the present application is a floral cloisonné enamel brooch, please refer to Figure 3 As shown, the size of the floral cloisonné enamel brooch is 50*7.5mm, the thickness of the base is 0.8mm, the vertical angle between the cloisonné silk thread and the body is 90°, the height of the cloisonné silk thread is 0.6mm, and the width of the cloisonné silk thread ranges from 0.25 to 2mm.

[0070] The embodiment of the present invention further provides an additive manufacturing method for imitation line drawing technique cloisonné enamel, which adopts the design method of imitation line drawing technique cloisonné enamel described above, and the additive manufacturing method comprises the following steps:

[0071] Input the adjusted carcass model file into the printer for slicing, and print out the initial carcass;

[0072] Specifically, in the specific steps of the embodiment of the present invention, the floral cloisonné enamel brooch model is exported to a model file format that can be recognized by the laser powder bed fusion printer software, and then the floral cloisonné enamel brooch model is printed in one piece using the laser powder bed fusion printer.

[0073] The printed initial tire body is subjected to a plate-repairing process to obtain a modified tire body;

[0074] In this step, the metal body of the printed floral cloisonné enamel brooch needs to be retouched, and the retouching process includes removing the support structure, grinding and polishing. It is necessary to remove the redundant printing support structure, and use a manual grinder to grind and polish the metal body surface step by step, from coarse grinding to fine grinding, until the overall surface of the body reaches a uniform and bright effect.

[0075] Pre-treating the repaired body before firing to obtain a first body;

[0076] In this step, the printed floral cloisonné enamel brooch body is annealed and surface cleaned. The body is evenly annealed with a welding torch or placed in an enamel furnace. The temperature is raised to between 600 and 650°. The metal surface is observed. If the entire silver sheet appears light red, annealing is completed (usually the annealing time does not exceed 2 minutes, depending on the size of the object). Then the surface is cleaned. 10% dilute sulfuric acid is used to clean excess impurities on the surface, and finally, excess grease is cleaned with detergent powder.

[0077] The concave area formed by the filigree in the first body is blued to obtain the second body;

[0078] In this step, it is a key step to add blue to the concave area formed by the wire drawing in the first body to obtain the second body. This process involves the following detailed steps: preparing tools and glazes; the wire-drawn body needs to go through welding, pickling, flattening, and straightening processes to ensure that the wire drawing is firmly attached to the body and the surface is flat; using a blue gun to fill the finely ground glaze into the gaps in the wire drawing. This step requires extremely high precision and patience to ensure uniform color and accurate pattern. The blue drawing should be filled full and flat.

[0079] The second body is placed in a furnace for firing to obtain an enamel product;

[0080] In this step, after the blue is applied, the second body is placed in a high-temperature furnace for firing, so that the glaze melts and solidifies on the wire. This step is called "firing the blue". After firing, the glaze is concave, and it is necessary to apply blue again and then fire again. This process may need to be repeated three or four times until the glaze is at the same height as the wire.

[0081] The fired enamel products are then subjected to grinding and electroplating treatments in turn.

[0082] In this step, when the fired enamel product is electroplated, a layer of other metal is plated on the metal part of the floral cloisonné enamel brooch.

[0083] Of course, surface treatment processes such as painting, electroplating, anodizing, etc. can be performed as needed to further improve the appearance or add a protective layer. This step can also be omitted in some other embodiments.

[0084] Therefore, the additive manufacturing method of cloisonné enamel is an innovative method that combines traditional cloisonné enamel craftsmanship with modern 3D printing technology. This method uses additive manufacturing technology to manufacture the metal body of cloisonné enamel, thereby improving production efficiency and precision while maintaining the artistic value of traditional craftsmanship.

[0085] Furthermore, in a specific solution of the embodiment of the present invention, the plate repair process includes removing the support structure, grinding and polishing.

[0086] Retouching is an important step in 3D printing post-processing, which involves removing the support structure on the printed part and grinding and polishing the surface of the printed part to improve its appearance quality and surface accuracy.

[0087] In the process of removing the support structure, it is usually necessary to use support removal tools such as pliers or grinders to remove the support structure, and avoid damaging the main part of the print when removing the support; after removing the support, the print may need to be cleaned to remove the powder or residue used in the printing process; then in the grinding process, sandpaper, grinding wheels, electric grinders and other tools can be used for grinding, and gradually transition from coarse sandpaper to fine sandpaper to reduce surface roughness; finally, in the polishing process, polishing wheels, polishing pastes or polishing liquids are used to perform polishing operations, and polishing pastes or polishing liquids are applied to the polished surface, and polishing wheels are used for polishing to achieve a smooth surface effect.

[0088] Furthermore, in a specific solution of the embodiment of the present invention, the pretreatment before firing includes annealing, pickling and cleaning.

[0089] The pretreatment of cloisonné enamel before firing is a very important step, which includes key links such as annealing, pickling and cleaning to ensure the quality of the enamel and the beauty of the finished product.

[0090] 1. Annealing process: Annealing is the process of heating the body to a certain temperature and then slowly cooling it. Annealing can remove the stress inside the body to prevent deformation or cracks during the subsequent firing process; annealing also helps to improve the ductility and toughness of the body, making it easier to wire and fire.

[0091] 2. Pickling process: Pickling is the process of using an acidic solution (such as sulfuric acid, hydrochloric acid or nitric acid) to clean the surface of the body to remove the oxide layer and impurities on the surface of the body to ensure that the enamel glaze can better adhere to the body; in addition, the surface of the body after pickling is cleaner and smoother, which helps to improve the adhesion of the enamel and the appearance of the finished product.

[0092] 3. Cleaning process: Cleaning is the process of thoroughly cleaning the body with clean water or neutral detergent to remove residual acidic solution and other dirt on the surface of the body in preparation for glazing.

[0093] Furthermore, in a specific solution of the embodiment of the present invention, the specific requirements for blueing the concave area formed by filigree in the first body to obtain the second body, and then putting the second body into the furnace for firing to obtain the enamel product are:

[0094] Use enamel glaze to dot blue, and repeat the blue dot and firing process until the enamel glaze and the surface of the filigree wire reach the same level.

[0095] When making cloisonné enamel, blueing and firing are two key steps that are repeated until the enamel glaze and the surface of the cloisonné wire reach a consistent level.

[0096] This process includes the following main steps:

[0097] 1. Blue-dotting process: Blue-dotting refers to filling the enamel glaze into the pattern frame pinched by the wire. According to the design pattern, the craftsman uses special tools to fill the glaze into the gaps between the wires point by point.

[0098] 2. Firing process (blueing): Firing is to put the blue-painted body into a high-temperature furnace for firing, so that the enamel glaze melts and solidifies on the wire. Because the glaze shrinks during the firing process and may not be consistent with the height of the wire at once, it is necessary to repeat the blueing and firing steps many times. After each firing, the height of the glaze needs to be checked. If it is lower than the wire, it needs to be blued again. The blueing and firing process needs to be repeated until the surface of the glaze is level with the top of the copper wire. This process may require multiple iterations, and polishing and repairing are required after each firing to ensure that the surface of the glaze is smooth and flush with the copper wire.

[0099] Furthermore, in a specific solution of the embodiment of the present invention, the firing process of placing the second body into a furnace for firing to obtain the enamel product is:

[0100] Raise the temperature of the enamel furnace to 700°~750°, then place the blue-painted body into the enamel furnace and bake for 0.9-1.5 minutes, then take it out and cool it naturally at room temperature.

[0101] Specifically, use a blue gun or dropper to fill the gaps formed by the cloisonné with glaze powder, and then put the blued floral cloisonné enamel brooch body into a high-temperature furnace. After being fired at a high temperature of 700° to 750°, the glaze can be melted. Because the glaze has shrinkage when it melts at high temperature, the surface of the glaze will be lower than the height of the cloisonné after firing or there will be defects such as bubbles and depressions. It is necessary to repeat the blueing and firing process until the glaze surface is flush with the height of the cloisonné.

[0102] Furthermore, the activation treatment includes activation, polishing, brightening and cleaning procedures.

[0103] It should be noted that grinding treatment is a very important post-processing process in the production of cloisonné enamel. It involves multiple procedures such as embroidery, polishing, brightening and cleaning to ensure that the surface of the cloisonné enamel work is smooth, colorful and shiny.

[0104] Specifically, when the body of a fired floral cloisonné enamel brooch is polished, embroidery and other abrasives are used to polish the surface of the fired cloisonné enamel to flatten the glaze on the surface of the cloisonné enamel that is higher than the filigree, revealing the filigree and laying the foundation for the subsequent polishing steps.

[0105] Polishing is the process of using sandstones of different coarseness and fineness to finely polish the surface of cloisonné. First, use coarse sandstone for polishing, and then use fine sandstone to gradually increase the fineness of polishing until the fire light and black silk on the glaze are polished away and the surface becomes smooth. As a preferred method of this embodiment, yellow stone is used to polish away the fire light and black silk on the glaze, and then basswood charcoal is dipped in water to polish horizontally and vertically until the product emits a uniform bright light.

[0106] Brightening is carried out after polishing, with the aim of making the surface of the cloisonné enamel brighter. Use basswood charcoal dipped in water to perform careful polishing until the product emits a uniform bright light, enhancing the artistic effect and ornamental value of the cloisonné enamel.

[0107] Cleaning is the last step in the polishing process, which aims to remove dust and impurities generated during the polishing process. Cleaning ensures that the cloisonné enamel is clean and ready for subsequent gilding or other decorative processes.

[0108] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A design method for cloisonné enamel using the imitation line drawing technique, characterized in that: The following steps are involved: Step S1: designing a cloisonné enamel body model using computer-aided software; wherein the body model includes a base and cloisonné; Step S2: according to the line shaping method in the art of white-line drawing, the lines of the filigree are processed by using the thickness, density, strength, reality and virtuality techniques; Step S3: After the filigree is processed, the carcass model file is output in STL format.

2. The design method of imitating line drawing technique cloisonné enamel according to claim 1, characterized in that: In step S2, the specific requirements for applying thickness, density, strength, reality and virtuality techniques to process the wire of the filigree include: The contact surface between the filigree and the tire base is not less than 0.5 mm; The filigree threads are perpendicular to the tire base; Unify the height size range of the filigree; The width of the filigree meets the requirements of white-line painting art and filigree pattern design.

3. The design method of imitating line drawing technique cloisonné enamel according to claim 2, characterized in that: The height of the filigree is in the range of 0.5 to 0.8 mm, and the width of the filigree is in the range of 0.25 to 2 mm.

4. The design method of imitating line drawing technique cloisonné enamel according to claim 1, characterized in that: The computer-aided software is any one of Jewel CAD, Rhino, and 3DMAX.

5. An additive manufacturing method for imitation line drawing cloisonné enamel, using the design method for imitation line drawing cloisonné enamel according to any one of claims 1 to 4, characterized in that: The following steps are involved: Input the adjusted carcass model file into the printer for slicing, and print out the initial carcass; The printed initial tire body is subjected to a plate-repairing process to obtain a modified tire body; Pre-treating the repaired body before firing to obtain a first body; The concave area formed by the filigree in the first body is blued to obtain the second body; The second body is placed in a furnace for firing to obtain an enamel product; The fired enamel products are then subjected to grinding and electroplating treatments.

6. The additive manufacturing method of imitation line drawing cloisonné enamel according to claim 5, characterized in that: The plate finishing process includes support structure removal, grinding and polishing.

7. The additive manufacturing method of imitation line drawing cloisonné enamel according to claim 5, characterized in that: The pretreatment before firing includes annealing, pickling and cleaning.

8. The additive manufacturing method of imitation line drawing cloisonné enamel according to claim 5, characterized in that: The specific requirements for blueing the concave area formed by filigree in the first body to obtain the second body, and then putting the second body into the furnace for firing to obtain the enamel product are: Use enamel glaze to dot blue, and repeat the blue dot and firing process until the enamel glaze and the surface of the filigree wire reach the same level.

9. The additive manufacturing method of imitation line drawing cloisonné enamel according to claim 5, characterized in that: The firing process of placing the second body into a furnace for firing to obtain an enamel product is as follows: Raise the temperature of the enamel furnace to 700°~750°, then place the blue-painted body into the enamel furnace and bake for 0.9-1.5 minutes, then take it out and cool it naturally at room temperature.

10. The additive manufacturing method of imitation line drawing cloisonné enamel according to claim 5, characterized in that: The activation process includes piercing, polishing, brightening and cleaning procedures.

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