Method for printing a high-light solid wood effect

Abstract

The application discloses a printing method of high-brightness solid wood effect, and particularly relates to the technical field of vehicle interiors, which comprises the following steps: using a modeling design software to insert a preset texture picture with a picture gray scale, adjusting the number and height of sampling points in a command to obtain a concave-convex surface texture matched with the picture; selecting the preset texture picture as a map to display colors, establishing a curved surface of a control point at a sampling position, and repairing details of the texture by adjusting the control point; selecting the curved surface and extruding the curved surface into a solid model with thickness; performing color texture rendering on the solid model; selecting a material as the wood grain picture after the solid model is given a map axis to obtain a solid model with stretched texture; and importing data of the solid model into a color 3D printer to print the solid model into a part. The printing method of high-brightness solid wood effect can realize the production of a part simulating a solid wood effect in a short time and ensure the aesthetic degree of the part.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle interior decoration, and in particular to a printing method for producing a high-gloss solid wood effect. Background Art

[0002] With the continuous development of the automobile industry, consumers have higher and higher requirements for car interiors. Solid wood samples are widely used as interior decorative parts for mid-to-high-end models due to their aesthetics. Among them, high-gloss solid wood parts are more upscale due to the thicker injection paint layer. The production of such parts includes multiple processes such as injection molding and cutting, and it is necessary to process multiple sets of molds to match the production of parts. Raw materials, molds and parts processing will consume a lot of money and time. The more commonly used alternative method on the market is to make samples by manually pasting veneer and spraying paint, but this method also requires the processing of simple molds and repeated spraying to reach the thickness of the paint layer. Although the production time and cost have decreased compared to mass production, they are still high.

[0003] Chinese invention patent CN114013033B discloses a method for controlling color during 3D printing. Although this method can control the color output during 3D printing, it still needs further improvement to be able to directly print parts with wood texture. Summary of the Invention

[0004] The purpose of the present invention is to provide a printing method with a high-gloss solid wood effect, which can realize the production of parts simulating the solid wood effect in a short time and ensure the aesthetics of the parts.

[0005] The present invention provides the following solutions:

[0006] According to one aspect of the present invention, a printing method for highlighting solid wood effect is provided, the printing method for highlighting solid wood effect comprising:

[0007] Use the modeling design software to insert a preset texture sample image in grayscale, adjust the number and height of sampling points in the command, and obtain a concave and convex surface texture that matches the image;

[0008] Select the preset texture sample image as a map to display the color, create a surface with control points at the sampling position, and repair the texture details by adjusting the control points;

[0009] Select the surface and extrude it into a solid model with thickness;

[0010] Perform color texture rendering on the solid model;

[0011] After assigning the mapping axis to the solid model, the material is selected as the preset texture sample image to obtain a solid model with a surface stretching texture;

[0012] The data of the solid model is imported into a color 3D printer to print the parts.

[0013] Optionally, perform color texture rendering on the solid model, including:

[0014] Select the Assign Plane Mapping Axis in the Solid Model Settings Mapping Axis and select the range you want to assign texture to;

[0015] Click Material - Use New Material - Customize, complete the mapping, and save the part data in .obj format.

[0016] Optionally, also include:

[0017] Before using a color 3D printer to print a part, after assigning a mapping axis to the solid model, the material is selected as the preset texture sample image. After obtaining a solid model with a surface stretching texture, a transparent layer is designed with a thickness set to a set value, including the thickness required for part polishing.

[0018] Select the print material for the transparent layer.

[0019] Optionally, also include:

[0020] Before printing a part using a color 3D printer, after selecting the printing material for the transparent layer, the transparent layer and part data are imported into the color 3D printing software of the color 3D printer in the form of components.

[0021] Optionally, also include:

[0022] Before using a color 3D printer to print parts, import the transparent layer and part data into the color 3D printing software of the color 3D printer in the form of components. Then, use color samples to print color plates of similar colors in the color 3D printing software, compare them, and select the color that is closest to the requirements.

[0023] Optionally, also include:

[0024] In the color 3D printing software, use the color sample to print a similar color palette, compare it, select the color closest to the requirement, and repeat the selection of the color closest to the requirement until all areas with color differences are processed.

[0025] Optionally, also include:

[0026] Before using a color 3D printer to print parts, after assigning a mapping axis to the solid model, the material is selected as the preset texture sample image. After obtaining a solid model with a surface stretch texture, if there are no obvious defects in the UV mapping class, it is adjusted in the three-dimensional rendering model through a global light rendering program. If there are obvious defects, the original image is repaired through image processing software.

[0027] Optionally, use modeling software to insert a preset texture sample image in grayscale. Adjust the number and height of sampling points in the command to obtain a fine concave and convex surface texture that matches the image, including:

[0028] In the modeling design software, click the grayscale image insertion command to insert the desired image, set the sampling points to 100*100, and the height to 0.8mm.

[0029] Optionally, use modeling design software to insert a preset texture sample image in grayscale, adjust the number and height of sampling points in the command, and obtain a concave and convex surface texture that matches the image. This also includes:

[0030] Set the image as a texture. The color status of the image can be observed in the rendering mode. For the object creation method, select the surface with the control point at the sampling position.

[0031] Optionally, the step of importing the data of the solid model into a color 3D printer and printing the part includes: a step of surface treatment of the part;

[0032] The steps of the part surface treatment include spraying UV paint on the part surface first, and then irradiating the part surface with ultraviolet rays to solidify the UV paint into a protective layer.

[0033] Through the above solution, the following beneficial technical effects are achieved:

[0034] Through color 3D printing, parts that simulate the effect of solid wood can be realized while ensuring the beauty of the parts;

[0035] Adding a transparent layer to the surface of the parts simulating the real wood effect further ensures the beauty of the parts;

[0036] When designing the transparent layer, the thickness required for part polishing is taken into consideration, which facilitates the subsequent processing of the parts.

[0037] During the processing, defects on the parts are corrected in a timely manner, which further ensures the beauty of the final parts;

[0038] The post-processing steps are used to ensure the highlight effect of the part surface;

[0039] The reform is fast and efficient, which can effectively save the production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flowchart of a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention.

[0041] Figure 2 This is a diagram of a display interface for setting a picture as a sticker, provided by one or more embodiments of the present invention.

[0042] Figure 3 This is a display interface diagram for observing the color display status of an image in rendering mode provided by one or more embodiments of the present invention.

[0043] Figure 4 This is a display interface diagram showing object control points provided by one or more embodiments of the present invention.

[0044] Figure 5 This is a display interface diagram of an extruded surface provided by one or more embodiments of the present invention.

[0045] Figure 6 This is a display interface diagram for assigning a planar mapping axis according to one or more embodiments of the present invention.

[0046] Figure 7 This is a diagram of an operation interface for completing mapping provided by one or more embodiments of the present invention.

[0047] Figure 8 This is a display interface diagram of a part entity after mapping is completed, provided by one or more embodiments of the present invention.

[0048] Figure 9 This is a flowchart of a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention.

[0049] Figure 10 This is a flowchart of a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention.

[0050] Figure 11 This is a flowchart of a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention.

[0051] Figure 12 This is a flowchart of color texture rendering in a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention.

[0052] Figure 13 This is a flow chart of surface texture generation in a printing method for highlighting solid wood effects according to one or more embodiments of the present invention. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] Figure 1 This is a flow chart of a method for printing a high-gloss solid wood effect provided by one or more embodiments of the present invention. Figure 1 The printing method for highlighting solid wood effect includes the following steps:

[0055] S11, using the modeling design software to insert a preset texture sample image in grayscale, adjusting the number and height of sampling points in the command to obtain a concave and convex surface texture that matches the image.

[0056] S12, selecting to set a preset texture sample image as a map to display colors, establishing a surface with control points at sampling positions, and repairing texture details by adjusting the control points.

[0057] S13, select the surface and extrude it into a solid model with thickness.

[0058] S14, performing color texture rendering on the solid model.

[0059] S15, after assigning the mapping axis to the solid model, the material is selected as the preset texture sample image to obtain a solid model with a surface stretching texture.

[0060] S16, importing the data of the solid model into a color 3D printer to print it into parts.

[0061] In this embodiment, Rhino software is selected as the modeling design software.

[0062] At the beginning of the method, a concave and convex surface texture corresponding to the wood grain image is created. The selected wood grain image is the basis for creating the concave and convex surface texture. The created concave and convex surface texture is created based on the selected wood grain image.

[0063] It is understandable that the selected wood grain image is composed of a group of wood textures with different shades.

[0064] The method for creating a concave and convex surface texture is to sample the inserted wood grain image after the image is inserted. Specifically, a number of sampling points are selected on the surface of the inserted image, and the wood grain image inserted into the modeling design software is sampled.

[0065] During the sampling process, you need to set the number and height of sampling points. If you set more sampling points, the sampling of the inserted image will be denser; on the contrary, if you set fewer sampling points, the sampling of the inserted image will be relatively sparse.

[0066] The height of the sampling point determines the thickness of the final extruded solid model. The larger the height of the sampling point is, the thicker the final extruded solid model will be.

[0067] In order to obtain a more refined concave and convex surface texture, it is not recommended to set the sampling points too sparsely. This is because setting too sparse sampling points will make the concave and convex surface texture too rough and fail to show the actual effect of the wood grain.

[0068] In actual software sampling operations, the "height" of the bitmap is sampled with the number of control points set in the U and V directions. The height parameter sets the scaling ratio of the surface height.

[0069] Specifically, the number of sampling points can be set to 100*100 and the height to 0.8mm. The setting interface in Rhino software is as follows Figure 2 shown.

[0070] Here, the number of sampling points and height are the specific setting parameters for setting the sampling points in Rhino software. Figure 2 As shown in Figure 2, a set number of average segmentation points are created on the input surface, and the averaged surface is created using the segmentation points as references. The height is the height of the averaged surface at the sampling point.

[0071] Then, in Rhino, set the wood grain image as a texture. After setting the wood grain image as a texture, the concave and convex surface texture will appear with color. Figure 2 The interface displayed is the same. Also, during the setup process, be sure to check the box next to "Set image as sticker."

[0072] Typically, the color displayed by the bump surface texture is the same as the color of the wood grain image set as the texture. For example, if the RGB values ​​at a specific location on the wood grain image are (163, 130, 230), then after setting it as the texture, the RGB values ​​displayed at the corresponding location should be the same (163, 130, 230). However, due to other reasons such as display color difference, it is possible that further surface color restoration of the bump surface texture may be required after the wood grain image is mapped.

[0073] In the rendering mode, you can observe the color status of the image, such as Figure 3 , select "Surface with control points at sampling positions" as the object creation method.

[0074] Create a surface with control points at the sampling position and repair the texture details by adjusting the control points.

[0075] Control points, also known as CV points, are key points that control the shape of NURBS objects. Rhino provides the ability to directly manipulate and edit the control points of NURBS objects.

[0076] Control points are the coefficients of the NURBS basis functions, also called control vertices (or nodes).

[0077] Control points are the "handles" of an object (curve, surface, light, section line boundary, dimension), and cannot be separated from the object to which it belongs.

[0078] Click the "Show Object Control Points" command, select the control points that need to be adjusted and drag them to the appropriate position to control the height variation of the surface, as shown in Figure 4 .

[0079] In Rhino, all individual surfaces and all surfaces can display control points (CV points), but multiple surfaces cannot display control points (CV points). Although both spheres and cubes are solid types, the difference between them is that a sphere is a single closed surface, while a cube is a closed surface composed of multiple surfaces.

[0080] Selecting and dragging a part of the control points (CV points) will find that the shape of the object will change. Moving the position of the control points (CV points) is actually one of the most important modeling methods in Rhino.

[0081] In the embodiment shown in Figure 1 , the control points of the surface are selected and dragged to control the height variation of the surface.

[0082] For example, in some parts, the required part thickness is thin, so the control points corresponding to this part can be dragged to a position closer to the bottom surface. In other parts, the required part thickness is thick, so the control points corresponding to this part can be dragged to a position farther away from the bottom surface. That is, by dragging the control points corresponding to each part of the surface, the shape of the concave-convex surface can be controlled.

[0083] Click the "Extrude Surface" command and select the surface established in the previous operation step to extrude a 5mm thick solid model, and hide the surface, as shown in Figure 5 .

[0084] It should be noted here that 5mm is a preferred thickness setting value. In actual surface-based operations, the thickness setting value can be selected flexibly.

[0085] After executing the surface extrusion operation, the object being manipulated in Rhino is no longer a surface. In other words, after executing the surface extrusion command, the object being manipulated changes from a surface to a solid model. A solid model means it has a specific spatial form. Because it occupies a specific position in three-dimensional space, it is no longer a surface with no thickness, as in the previous steps.

[0086] Next, you can render the solid model with color texture.

[0087] To render the texture of the extruded solid model, select "Assign Planar Mapping Axis" in "Solid Setting Mapping Axis". Figure 6 As shown, select the range you want to assign texture to and right-click to confirm.

[0088] Click "Material" - "Use New Material" - "Customize" to complete the mapping, such as Figure 7 and Figure 8 As shown, save the part data in .obj format.

[0089] Also, printing requires the model to be watertight, so Magics should be used to check and repair the data before mapping.

[0090] After completing the above steps, a wood-like stretched texture, similar to that of a wooden surface, is created on the surface of the extruded solid model. This stretched texture refers to the uniform distribution of long, thin, alternating dark and light stripes across the surface of the extruded solid model. Due to the long, thin, and strip-like texture, it's called a stretched texture.

[0091] Finally, the data was imported into GrabCAD, a 3D printing software, and printed using a color 3D printer.

[0092] By executing Figure 1 The various operating steps shown realize the whole process of manufacturing parts with wood texture on the surface from three-dimensional modeling to 3D printing, which not only realizes the simulation of the real wood effect of the parts, but also ensures the aesthetics of the parts.

[0093] Figure 9 This is a flow chart of a method for printing a high-gloss solid wood effect provided by one or more embodiments of the present invention. Figure 9 The printing method for highlighting solid wood effect includes the following steps:

[0094] S91, use the modeling design software to insert a preset texture sample image in the grayscale of the image, adjust the number and height of sampling points in the command, and obtain the concave and convex surface texture that matches the image.

[0095] S92, select the preset texture sample picture as a map to display color, establish a control point on the sampling position of the curved surface, and adjust the control point to repair the details of the texture.

[0096] S93, select the curved surface and extrude it into a solid model with thickness.

[0097] S94, color texture rendering is performed on the solid model.

[0098] S95, after assigning a map axis to the solid model, the material is selected as the preset texture sample picture, and a solid model with surface stretch texture is obtained.

[0099] S96, design a transparent layer part with a set thickness, which includes the thickness required for part polishing.

[0100] S97, select the printing material of the transparent layer.

[0101] S98, import the transparent layer and part data into the color 3D printing software of the color 3D printer in the form of an assembly.

[0102] S99, import the data of the solid model into the color 3D printer to print a part.

[0103] By Figure 9 The difference between the embodiment shown in the figure and the previous embodiment is that a transparent layer is added to the surface of the printed part finally output by the color 3D printer.

[0104] That is, after obtaining a solid model with stretch texture, an operation step of designing a transparent layer part is added. After adding the operation step of designing a transparent layer, the actual produced part has not only the wood grain texture itself, which is very beautiful, but also a transparent layer wrapped on the surface of the part.

[0105] With the wrapping of the transparent layer, the appearance of the part is more beautiful. Moreover, since the transparent layer is wrapped on the surface of the part, the part itself is not easily damaged, which facilitates further processing and transportation of the part.

[0106] In the case where some post-operation such as polishing is completed on the part, the transparent layer can simulate the highlight effect of the resin of the wood sample.

[0107] It should be noted that the thickness of the transparent layer part of the part is a set value set in advance. Moreover, the selection of the set value takes into account the thickness required for polishing the part.

[0108] It is understandable that the polishing operation of the parts will cause some loss of the transparent layer on the outer surface of the parts. Therefore, when designing the thickness of the transparent layer of the parts, it is necessary to design a certain margin in advance to facilitate the subsequent polishing operation.

[0109] Preferably, the thickness of the transparent layer is set to 1 mm.

[0110] After completing the design of the transparent layer and setting the thickness value, you can then select the printing material for the transparent layer.

[0111] In this embodiment, the choice of transparent layer printing material is: VeroUltraClear.

[0112] After completing the above-mentioned steps of transparent layer design, thickness setting, and printing material selection, the designed transparent layer and the part body can be imported into the 3D printing software. In this embodiment, the color 3D printing software is GrabCAD software.

[0113] The import operation performed combines the transparent layer with the part itself and imports it into the color 3D printing software as a single component. In other words, during this import operation, the transparent layer is not distinguished from the part itself and imported separately. The transparent layer is imported into the 3D printing software along with the rest of the part.

[0114] After completing the above model data import, you can operate the 3D printing software to perform printing operations on the imported solid model.

[0115] It's understandable that the aforementioned transparent layer design, printing material selection, and component importing steps are all performed after the solid model has been extruded and its surface texture has been set. This is primarily because the shape of the transparent layer is closely related to the appearance of the extruded solid model. Without the solid model being extruded, the specific shape of the transparent layer cannot be determined, and therefore the transparent layer design steps cannot be completed.

[0116] Depend on Figure 9 After obtaining a solid model with a stretched texture, the illustrated embodiment further designs a transparent layer, sets the thickness value of the transparent layer, selects the printing material of the transparent layer, and performs a series of operations, thereby realizing the setting of a transparent layer on the surface of the part and further ensuring the aesthetics of the 3D printed part.

[0117] Figure 10 This is a flow chart of a method for printing a high-gloss solid wood effect provided by one or more embodiments of the present invention. Figure 10 The printing method for highlighting solid wood effect includes the following steps:

[0118] S101, using modeling design software to insert a preset texture sample image in grayscale, adjusting the number and height of sampling points in the command to obtain a concave-convex surface texture that matches the image.

[0119] S102 , selecting a preset texture sample image as a map to display colors, establishing a surface with control points at sampling positions, and repairing texture details by adjusting the control points.

[0120] S103, select the surface and extrude it into a solid model with thickness.

[0121] S104, performing color texture rendering on the entity model.

[0122] S105 , after assigning the entity mapping axis, selecting the material as the preset texture sample image to obtain an entity model with a surface stretching texture.

[0123] S106, if there are no obvious defects in the UV mapping, adjustments are made in the 3D rendering model through a global light rendering program; if there are obvious defects, the original image is repaired through image processing software.

[0124] S107, importing the data of the solid model into a color 3D printer to print it into parts.

[0125] In by Figure 10 In the embodiment shown, the difference from the above-mentioned embodiment of the present invention is that Figure 10 In the illustrated embodiment, operation steps for inspecting and repairing obvious defects are added.

[0126] Understandably, when using modeling software to design parts that require 3D printing, operational errors, improper handling, and other factors may result in defects in the resulting solid model with stretched textures. Some of these defects can be quite noticeable. Typically, such defects include noticeable color differences in the surface texture or the lack of texture on parts of the part surface.

[0127] In order to ensure the final qualified rate and aesthetics of the parts produced, after the solid model with stretched texture is generated, it is necessary to check for obvious defects.

[0128] To check for obvious defects, the generated solid model must be inspected from a 360° perspective. The generated solid model must be free of obvious defects from any perspective to pass the inspection.

[0129] Once the generated solid model has passed the inspection for obvious defects, it is adjusted in the 3D rendering model through a global light rendering program. In this embodiment, the global light rendering program is the KeyShot program.

[0130] KeyShot can directly open 3D models. Data files from animation design software like 3DSMax, Maya, and C4D, industrial design software like Rhino and Inventor, and mechanical design software like Creo, SolidWorks, and NX can all be easily imported, with excellent file compatibility across major rendering software. Plug-ins for some mechanical design software are also available, allowing direct linking from software like Creo, SolidWorks, and Rhino into KeyShot while preserving colors, names, and structure.

[0131] KeyShot has improved translucent materials, offering more accurate subsurface scattering. With specular map support and scientifically accurate interaction between caustics and physical lighting, these translucent materials are considered industry leaders. Furthermore, a toon shading feature allows for smooth, hard metallic surfaces to be combined with softer diffuse and glare reflections, significantly enhancing the depth of the image.

[0132] If the defect does not pass the inspection, the defects in the generated entity model need to be repaired by image processing software. In this embodiment, the image processing software is Photoshop. After the original image is repaired, the original image is repaired according to the Figure 1 The execution steps of the illustrated embodiment are executed step by step to complete the 3D printing of the parts with the final solid wood effect.

[0133] In by Figure 10 In the illustrated embodiment, after obtaining the solid model with the stretched texture, an inspection step for obvious defects is added. When obvious defects are found in the solid model, the texture on the solid model is repaired with the original image. When obvious defects are found in the solid model, adjustments are made using the global light rendering program, further ensuring the yield and aesthetics of the 3D printed parts.

[0134] Figure 11 This is a flow chart of a method for printing a high-gloss solid wood effect provided by one or more embodiments of the present invention. Figure 11 The printing method for highlighting solid wood effect includes the following steps:

[0135] S111, using modeling design software to insert a preset texture sample image in grayscale, adjusting the number and height of sampling points in the command to obtain a concave-convex surface texture that matches the image.

[0136] S112, selecting to set a preset texture sample image as a map to display colors, establishing a surface with control points at sampling positions, and repairing texture details by adjusting the control points.

[0137] S113, select the surface and extrude it into a solid model with thickness.

[0138] S114, performing color texture rendering on the entity model.

[0139] S115 , after assigning the mapping axis to the solid model, the material is selected as the preset texture sample image to obtain a solid model with a surface stretching texture.

[0140] S116, importing the data of the solid model into a color 3D printer to print it into parts.

[0141] S117, after the printed part is removed from the support, the remaining support is soaked in a specific solution.

[0142] S118, grinding and polishing the outer surface of the parts to achieve a high-gloss effect.

[0143] S119, first spray UV paint on the surface of the part, then irradiate the surface of the part with ultraviolet rays to solidify the UV paint into a protective layer.

[0144] Depend on Figure 11 The embodiment shown is different from the above-mentioned embodiment of the present invention in that Figure 11 In the illustrated embodiment, a post-processing operation step is added after the 3D printing is completed.

[0145] Understandably, after using color 3D printing software to call a color 3D printer and completing the 3D printing operation, the printed part is not yet in a state ready for final delivery to the end user. For example, the surface may have some sharp corners and imperfections. Therefore, the completed 3D printed part requires some post-processing steps before it can be finally delivered to the user.

[0146] After the post-processing steps are adopted, the surface of the processed parts will be smoother, and the fit between them and other workpieces that need to be matched during assembly will be tighter and smoother. The surface color will be more vivid and more beautiful.

[0147] Specifically, after the 3D printing of a part is completed, the remaining supports of the printed part are first soaked in a specific solution. The purpose of soaking is to make the remaining supports easier to remove from the part body.

[0148] The soaking solution is pre-mixed. Furthermore, the solution is prepared according to a predetermined material ratio. After soaking, any remaining supports will more easily fall off the printed part, making it easier to separate the parts.

[0149] Understandably, during the 3D printing process, various supports surround the printed parts. These support points create uneven surfaces on the 3D printed parts. Installing these uneven surfaces in a car's cabin can severely impact the user experience. Even more seriously, it can lead to unsafe situations during use.

[0150] To ensure user safety, the surface of the part needs to be polished after soaking in the solution. Polishing, also known as grinding, aims to smooth the surface of the part and remove any unevenness, such as dents and bumps.

[0151] The polishing process can use tools such as sandpaper and polishing paste.

[0152] After grinding and polishing, the surface of the part becomes a smooth plane. It feels very smooth to the touch. There will no longer be any unsafe incidents caused by surface unevenness during use.

[0153] Finally, the polished outer surface is sprayed with UV paint and then cured by UV light. In this way, the appearance of the part will be more beautiful, with not only clear wood grain but also a high-gloss effect.

[0154] It should be noted that although the process described in this embodiment does not specify whether the outer surface of the printed part has a transparent layer, in the actual processing process, parts that use post-processing operation steps usually have a transparent layer added to their outer shell.

[0155] That is to say, in some preferred implementations of this embodiment, before 3D printing the parts, some transparent layer-related operation steps should be required, such as transparent layer design, printing material selection, and component form import into the 3D printing software.

[0156] When a transparent layer is designed on the outer surface of a part, the part is then subjected to a series of post-processing operations such as polishing, UV paint spraying, etc. to beautify the appearance, so that the outer surface of the part is more likely to have a high-gloss appearance effect.

[0157] Depend on Figure 11In the illustrated embodiment, after the parts are 3D printed, a series of post-processing operations such as solution immersion, polishing, and UV paint spraying are further added to make the appearance of the parts more beautiful and produce a high-gloss visual effect, further ensuring the beauty of the 3D printed parts.

[0158] Figure 12 This is a flowchart of color texture rendering in a printing method for highlighting solid wood effects provided by one or more embodiments of the present invention. Figure 12 , color texture rendering of the entity includes the following steps:

[0159] S121, select the assigned plane mapping axis in the solid model setting mapping axis, and select the range you want to assign texture.

[0160] S122, click Material - Use New Material - Customize, complete the mapping, and save the part data in .obj format.

[0161] It should be understood that in the process of mapping a solid model, a mapping axis needs to be selected first.

[0162] A mapping axis is an axis in three-dimensional space. It has a start and end point. However, it is just an axis. That is, a mapping axis has no volume or area.

[0163] After selecting a mapping axis, you must select the mapping range. This means that each mapping operation can only be applied to a specific area on the surface of the solid model. It's impossible to have a mapping operation without boundaries. Selecting the mapping range requires you to clearly define the mapping range.

[0164] For example, if you only map the top surface of a part, you can select a side edge of the top surface of the part as the mapping axis and set the mapping range to the entire top surface of the part.

[0165] After completing the mapping axis and mapping range settings, you can perform the corresponding mapping operation. Specifically, in Rhino software, select "Material" - "Use New Material" - "Customize" command to complete the mapping.

[0166] After the mapping is completed, save the designed part in .obj format.

[0167] Through a series of operations such as setting the mapping axis, assigning the texture range, and clicking the relevant commands, the relevant texture rendering operations of the solid model are completed.

[0168] Figure 13This is a flow chart of surface texture generation in a method for printing a high-gloss solid wood effect provided by one or more embodiments of the present invention. Figure 13 , use the modeling design software to insert a suitable preset texture sample image in grayscale, adjust the number and height of sampling points in the command, and obtain a fine concave and convex surface texture that matches the image. The steps include the following:

[0169] S131. In the modeling design software, click the grayscale image insertion command to insert the desired image, set the number of sampling points to 100*100, and the height to 0.8mm.

[0170] S132, set the image as a texture. The color status of the image can be observed in the rendering mode. The object creation method selects the surface with the control point at the sampling position.

[0171] As previously mentioned, during the sampling point setting process, the sampling points should not be set too sparsely. The drawback of setting the sampling points too sparsely is that image details are easily missed. In this embodiment, the number of sampling points is set to 100*100. That is, the number of sampling points along the horizontal axis is 100, and the number of sampling points along the vertical axis is also 100.

[0172] The height of the sampling point determines the degree of the surface undulation of the inserted image. In this embodiment, the height of the sampling point is set to 0.8 mm.

[0173] After completing the above settings of the number of sampling points and height, complete the settings of other items in the same dialog box.

[0174] The settings for other items include checking the "Set image as texture" checkbox, clicking the "Surface with control points at sampling position" cell box, and confirming that the object creation method is "Control points at sampling position".

[0175] Selecting the "Surface with control points at sampling positions" radio button means that the object is created using control points. Furthermore, the sampling positions of the relevant control points and sampling points are coincident.

[0176] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A printing method for highlighting solid wood effect, characterized in that: The printing method for highlighting solid wood effect includes: Use the modeling design software to insert a preset texture sample image in grayscale, adjust the number and height of sampling points in the command, and obtain a concave and convex surface texture that matches the image; Select the preset texture sample image as a map to display the color, create a surface with control points at the sampling position, and repair the texture details by adjusting the control points; Select the surface and extrude it into a solid model with thickness; Perform color texture rendering on the solid model; After assigning the mapping axis to the solid model, the material is selected as the preset texture sample image to obtain a solid model with a surface stretching texture; The data of the solid model is imported into a color 3D printer to print the parts.

2. The method according to claim 1, characterized in that The color texture rendering of the entity model includes: Select the Assign Plane Mapping Axis in the Solid Model Settings Mapping Axis and select the range you want to assign texture to; Click Material - Use New Material - Customize, complete the mapping, and save the part data in .obj format.

3. The method according to claim 1, characterized in that Also includes: Before using a color 3D printer to print a part, after assigning a solid mapping axis, the material is selected as the preset texture sample image. After obtaining a solid model with a surface stretching texture, a transparent layer is designed with a set thickness, including the thickness required for part polishing. Select the print material for the transparent layer.

4. The method according to claim 3, characterized in that Also includes: Before printing a part using a color 3D printer, after selecting the printing material for the transparent layer, the transparent layer and part data are imported into the color 3D printing software of the color 3D printer in the form of components.

5. The method according to claim 4, characterized in that Also includes: Before using a color 3D printer to print parts, import the transparent layer and part data into the color 3D printing software of the color 3D printer in the form of components. Then, use color samples to print color plates of similar colors in the color 3D printing software, compare them, and select the color that is closest to the requirements.

6. The method according to claim 5, characterized in that Also includes: In the color 3D printing software, use the color sample to print a similar color palette, compare it, select the color closest to the requirement, and repeat the selection of the color closest to the requirement until all areas with color differences are processed.

7. The method according to claim 1, characterized in that Also includes: Before using a color 3D printer to print parts, after assigning a mapping axis to the solid model, the material is selected as the preset texture sample image. After obtaining a solid model with a surface stretch texture, if there are no obvious defects in the UV mapping class, it is adjusted in the three-dimensional rendering model through a global light rendering program. If there are obvious defects, the original image is repaired through image processing software.

8. The method according to claim 1, characterized in that Use the modeling design software to insert a preset texture sample image in grayscale. Adjust the number and height of sampling points in the command to obtain a concave and convex surface texture that matches the image, including: In the modeling design software, click the grayscale image insertion command to insert the desired image, set the sampling points to 100*100, and the height to 0.8mm.

9. The method according to claim 8, characterized in that Use the modeling design software to insert a preset texture sample image in grayscale, adjust the number and height of sampling points in the command to obtain a concave and convex surface texture that matches the image, and also include: Set the image as a texture. The color status of the image can be observed in the rendering mode. For the object creation method, select the surface with the control point at the sampling position.

10. The method according to claim 9, characterized in that The data of the solid model is imported into a color 3D printer to print the parts, including the steps of: surface treatment of the parts; The steps of the part surface treatment include spraying UV paint on the part surface first, and then irradiating the part surface with ultraviolet rays to solidify the UV paint into a protective layer.

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