Methods and systems for embossing book edges

Abstract

This invention provides a method and system for processing book edge relief. The method includes: converting a preset book edge planar image into a three-dimensional depth map containing depth information; creating a three-dimensional relief model of the book edge based on the three-dimensional depth map; generating an engraving scheme based on the three-dimensional relief model, the engraving scheme including tool path, feed rate, step distance, and depth of cut; optimizing the engraving scheme according to the paper characteristics of the book; mechanically engraving the book edge according to the optimized engraving scheme; and inkjet coloring the mechanically engraved book edge to form an relief pattern with a three-dimensional visual effect. In this invention, by mechanically engraving the book edge, a book edge relief with controllable depth, sharp edges, and a smooth and delicate surface can be formed, which is beneficial for the accurate registration and color reproduction of subsequent inkjet printing, completely avoiding the defects of laser edge burning and insufficient layering of mechanical imprinting, and enabling the mass production of high-quality book edge decorations.

Description

Technical Field

[0001] This invention relates to the field of book processing technology, and in particular to a method and system for processing book edge relief. Background Technology

[0002] In recent years, embossed book edges, with their unique three-dimensional feel and artistic expression, have gradually become an important development direction for the design of high-quality books and periodicals. However, the technical means to achieve embossed book edges are still relatively scarce in the industry, mainly limited to mechanical embossing and laser engraving, each with its own obvious shortcomings.

[0003] Mechanical embossing mainly uses molds or rollers to apply pressure to the edges of books to create an embossed structure. This embossed structure is shallow, lacks depth, has a poor sense of layering, and has a stiff visual effect. It is also prone to wear and collapse when flipping through the pages and lacks durability.

[0004] Laser engraving primarily utilizes high-energy lasers to vaporize materials and create relief structures. While it offers superior depth compared to mechanical embossing, its edge finishing is relatively rough. More importantly, laser processing is prone to edge burning, causing the paper to yellow and making subsequent precise coloring difficult, severely impacting the final product's appearance.

[0005] The content of the background section is merely the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0006] To address one or more deficiencies in the prior art, the present invention provides a method for embossing the margins of books and periodicals, comprising: Convert the preset book edge plan view into a 3D depth map containing depth information; Create a 3D relief model of the book edge based on the aforementioned 3D depth map; An engraving scheme is generated based on the three-dimensional relief model, and the engraving scheme includes tool path, feed rate, step distance and depth of cut; The engraving scheme is optimized based on the paper characteristics of the book or periodical; The edges of the book are mechanically engraved according to the optimized engraving scheme; and The mechanically engraved edges of the book are then inkjet-painted to create a relief pattern with a three-dimensional visual effect.

[0007] According to one aspect of the present invention, the step of converting a preset book edge plan view into a stereoscopic depth map containing depth information includes: The book edge planar image is processed using image processing software to extract depth and generate a depth map. The pixel brightness in the depth map is positively correlated with the depth distance. The depth map is inverted to obtain a stereo depth map, in which pixel brightness is negatively correlated with spatial depth.

[0008] According to one aspect of the present invention, the step of optimizing the engraving scheme based on the paper characteristics of the book or periodical includes: The cutting depth is adjusted to 0.1-0.5 mm according to the paper characteristics of the book.

[0009] According to one aspect of the invention, the feed rate includes a fine carving feed rate and / or a rough carving feed rate; Based on the paper characteristics of the book or periodical, the steps to optimize the engraving scheme include: Based on the paper characteristics of the book or periodical, the engraving feed speed is adjusted to 200-800 mm / min; and / or, Based on the paper characteristics of the book or periodical, the rough engraving feed speed is adjusted to 1000-1500 mm / min.

[0010] According to one aspect of the invention, the step distance includes fine carving step distance and / or rough carving step distance; Based on the paper characteristics of the book or periodical, the steps to optimize the engraving scheme include: Based on the paper characteristics of the book or periodical, the engraving step distance is adjusted to 10%–30% of the tool diameter; and / or, Based on the paper characteristics of the book or periodical, the roughing step distance is adjusted to 50%–80% of the tool diameter.

[0011] According to one aspect of the present invention, the step of mechanically engraving the margin of the book according to the optimized engraving scheme includes: One or more books to be engraved are placed into a fixed clamp and separated by a partition; The fixing fixture is fixed to the processing station of the engraving equipment; Based on the engraving equipment and the optimized engraving scheme, the edges of the book are mechanically engraved to form an edge relief; and Dust is removed from the edges of the book after mechanical engraving.

[0012] According to one aspect of the invention, the book edge relief processing method further includes determining the engraving tool based on the paper characteristics of the book and the pattern features of the book edge plan view.

[0013] According to one aspect of the present invention, the step of inkjet coloring the mechanically engraved book edge includes: The visual positioning module based on the inkjet equipment performs planar scanning on a mechanically engraved book edge to obtain the template base shape; Extract the feature information of the template base shape to establish the relief model base plate; The book edge plan view and the template base shape are matched to generate a texture that matches the template base shape; The visual positioning module performs a comprehensive scan of one or more mechanically engraved book edges and compares them with the relief model base plate to identify the size, direction, and positional deviation of each book edge. Based on the inkjet equipment, the texture, and the size, direction, and positional deviations of each book edge, inkjet coloring is performed on each book edge.

[0014] According to one aspect of the present invention, the step of inkjet coloring the mechanically engraved book edge further includes: Transfer the fixing fixture to the worktable of the inkjet equipment; The visual positioning module based on the inkjet equipment performs planar scanning on a mechanically engraved book edge to obtain the template base shape; Extract the feature information of the template base shape to establish the relief model base plate; The book edge plan view and the template base shape are matched to generate a texture that matches the template base shape; The visual positioning module performs a comprehensive scan of one or more mechanically engraved book edges and compares them with the relief model base plate to identify the size, direction, and positional deviation of each book edge. Based on the inkjet equipment, the texture, and the size, direction, and positional deviations of each book edge, inkjet coloring is performed on each book edge.

[0015] The present invention also provides a book edge embossing processing system for performing the above-described book edge embossing processing method, the book edge embossing processing system comprising: The engraving equipment is configured to mechanically engrave the edges of the books and periodicals according to the optimized engraving scheme. Inkjet equipment, configured to apply inkjet color to the edges of books that have been mechanically engraved; A fixing fixture configured to hold one or more books or periodicals.

[0016] According to one aspect of the invention, the book edge embossing system further includes a partition for separating adjacent books.

[0017] Compared with the prior art, the embodiments of the present invention provide a method and system for processing book edge relief. By optimizing the engraving scheme, the engraving scheme can be adapted to books and periodicals with different paper characteristics, which helps to ensure the quality of subsequent mechanical engraving. By mechanically engraving the edges of books and periodicals, a book edge relief with controllable depth, sharp edges, and smooth and delicate surface can be formed, which is conducive to the accurate registration and color reproduction of subsequent ink spraying, completely avoiding the defects of yellowing due to laser burning and insufficient layering of mechanical printing, and enabling the mass production of high-quality book edge decoration. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A flowchart of a book edge embossing processing method according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of a book edge plan view according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a depth map according to an embodiment of the present invention is shown; Figure 4a A schematic diagram of a stereoscopic depth map according to an embodiment of the present invention is shown; Figure 4b A schematic diagram of a modified stereo depth map according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of a three-dimensional relief model according to an embodiment of the present invention is shown; Figure 6a A schematic diagram of a fixing clamp according to an embodiment of the present invention is shown; Figure 6b A schematic diagram of a book clamping device according to an embodiment of the present invention is shown.

[0019] In the diagram: 100, book edge relief processing method; 200, fixing fixture; 210, base plate; 220, fixing plate; 230, movable plate; 240, adjustment device; 250, clamping plate; 300, partition. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Figure 1 A flowchart of a book edge embossing method 100 according to an embodiment of the present invention is shown. Figure 1 As shown, the book edge relief processing method 100 includes the following steps, which are described in detail below.

[0027] In step S110: the preset book edge plan view is converted into a three-dimensional depth map containing depth information.

[0028] Figure 2 A schematic diagram of a book edge plan view according to an embodiment of the present invention is shown. Figure 2 As shown, a book border plan is a design draft used to represent the two-dimensional layout of the book border decorative pattern. It usually includes visual information such as pattern outline, texture distribution, and color partitioning.

[0029] In a specific implementation, image processing software can be used to perform depth extraction processing on the book edge plan view to generate a depth map. Figure 3 A schematic diagram of a depth map according to an embodiment of the present invention is shown. Figure 3As shown, in the depth map, pixel brightness (grayscale) is positively correlated with depth distance. In some embodiments, the depth map can be generated using the Neural Filters function of Adobe Photoshop. The specific process is as follows: First, open the book edge plan view in Adobe Photoshop, launch "Filter → Neural Filters", and check "Deep Blur"; then, in the output settings, check "Output depth map only" and select "New Layer" as the output method to obtain the depth map. Optionally, the Levels tool in Adobe Photoshop can also be used to adjust the depth of the depth map to optimize the contrast and distribution range of the depth levels.

[0030] In a specific implementation, image processing software can be used to invert the depth map to obtain a stereo depth map. The figure illustrates a schematic diagram of a stereo depth map according to an embodiment of the present invention. Figure 4a As shown, a stereo depth map refers to a digital image that introduces depth information onto a two-dimensional plane and presents the three-dimensional hierarchical structure of a pattern through grayscale values. In the stereo depth map, pixel brightness (grayscale) is negatively correlated with spatial depth. Preferably, image processing software can be used to modify the stereo depth map to repair missing details and optimize grayscale transitions. Figure 4b The modified stereo depth map is shown.

[0031] In step S120: Create a three-dimensional relief model of the book edge based on the stereo depth map.

[0032] Figure 5 A schematic diagram of a three-dimensional relief model according to an embodiment of the present invention is shown. Figure 5 As shown, in a specific implementation, the image texture function of computer-aided design software (such as CAD, Blender, etc.) can be used to create a 3D relief model of the book edge based on the 3D depth map. During this process, the mapping relationship between pixel brightness (grayscale) and spatial depth, as well as the height parameter of the 3D relief model, need to be set. Simultaneously, the grayscale values ​​of certain areas of the 3D depth map can be adjusted, and the effect of the 3D relief model can be previewed until the surface transition of the 3D relief model is natural, the layers are clear, and the detailed features match the book edge planar image.

[0033] It should be noted that the height of the 3D relief model is generally controlled between 2 and 10 mm, and the specific height can be determined according to the characteristics of the paper to prevent deformation or damage to the paper during the subsequent mechanical engraving process. For example, for soft, thin paper (grammage less than 80 g / m²)... 2The height of the 3D relief model should be controlled between 2 and 5 mm; for medium-hardness paper (grammage between 80 and 175 g / m²), the height should be controlled between 2 and 5 mm. 2 The height of the 3D relief model should be controlled between 2 and 8 mm; for cardboard (grammage greater than 175 g / m²), the height should be controlled between 2 and 8 mm. 2 The height of the three-dimensional relief model is controlled between 2 and 10 mm.

[0034] In step S130: Generate a carving scheme based on the three-dimensional relief model.

[0035] In a specific implementation, computer-aided manufacturing software (such as JDPaint and other fine-carving design software) can be used to generate an executable carving plan based on the 3D relief model. This carving plan includes process parameters such as toolpath, feed rate, stepover, depth of cut, and spindle speed, and is output in the form of carving code (e.g., G-code) to drive the carving equipment to complete the mechanical carving process. Those skilled in the art will readily understand that while existing computer-aided manufacturing software can generate corresponding carving plans based on 3D relief models, such plans are only suitable for hard materials such as wood, plastic, jade, and metal. In contrast, the paper used in books is soft, has low fiber strength, and low hardness. If the carving plan generated by existing computer-aided manufacturing software is directly used, paper deformation and tearing are likely to occur during the mechanical carving of the book edges, seriously affecting the quality of the finished product. Therefore, it is necessary to adaptively optimize the previously generated carving plans.

[0036] In step S140: Optimize the engraving scheme according to the paper characteristics of the book.

[0037] In a specific implementation, the cutting depth in the engraving scheme can be adjusted to 0.1-0.5 mm according to the paper characteristics. Specifically, for soft, thin paper, the cutting depth can be adjusted to 0.1-0.2 mm to avoid paper deformation and tearing; for medium-hardness paper, the cutting depth can be adjusted to 0.2-0.3 mm to improve engraving efficiency while avoiding paper deformation and tearing; for hard paper, the cutting depth can be adjusted to 0.3-0.5 mm to improve engraving efficiency while avoiding paper deformation and tearing.

[0038] In specific implementations, depending on the characteristics of different papers, the engraving scheme can employ only fine engraving or a combination of rough and fine engraving. For example, for thin, soft paper, the engraving scheme generally uses only fine engraving, without rough engraving, otherwise it is easy to cause paper deformation, tearing, or fuzzing. For medium-hardness and hard paper, rough and fine engraving are usually combined, using a strategy of "rapid material removal through rough engraving + fine finishing through fine engraving" to significantly improve engraving efficiency while ensuring processing quality. Correspondingly, the feed speed can be divided into fine engraving feed speed and rough engraving feed speed, and the step distance can be divided into fine engraving step distance and rough engraving step distance. Therefore, the fine engraving feed speed, rough engraving feed speed, and rough engraving step distance can be set separately according to the paper characteristics. Typically, the fine engraving feed speed is adjusted to 200-800 mm / min, the rough engraving feed speed is adjusted to 1000-1500 mm / min, the fine engraving step distance is adjusted to 10%-30% of the tool diameter, and the rough engraving step distance is adjusted to 50%-80% of the tool diameter. Specifically, for soft, thin paper, the fine engraving feed speed can be adjusted to 200-400 mm / min, and the fine engraving step distance can be adjusted to 10%-20% of the tool diameter; for medium-hard paper, the fine engraving feed speed can be adjusted to 400-600 mm / min, the rough engraving feed speed can be adjusted to 1000-1200 mm / min, the fine engraving step distance can be adjusted to 20%-25% of the tool diameter, and the rough engraving step distance can be adjusted to 50%-60% of the tool diameter; for hard paper, the fine engraving feed speed can be adjusted to 600-800 mm / min, the rough engraving feed speed can be adjusted to 1200-1500 mm / min, the fine engraving step distance can be adjusted to 25%-30% of the tool diameter, and the rough engraving step distance can be adjusted to 60%-80% of the tool diameter.

[0039] In a specific implementation, the spindle speed can be adjusted to 12,000-24,000 RPM. Specifically, for fine engraving processes, the spindle speed can be adjusted to a higher level (e.g., 18,000-24,000 RPM) to obtain better surface finish and finer edge quality. If abnormal situations such as tool or workpiece overheating occur during processing, the spindle speed can be appropriately reduced to decrease cutting heat generation and ensure processing quality and production safety.

[0040] In step S150: Mechanically engrave the edges of the book according to the optimized engraving scheme.

[0041] In a specific implementation, one or more books to be engraved can be loaded into a fixed fixture, and the books can be separated by partitions to ensure the stability of the books during the mechanical engraving process and to ensure the engraving quality. Then, the fixed fixture is fixed to the processing station of the engraving equipment, ready for the engraving operation. Figure 6a A schematic diagram of a fixing clamp 200 according to an embodiment of the present invention is shown. Figure 6b A schematic diagram of a book clamping fixture 200 according to an embodiment of the present invention is shown. Figure 6a and Figure 6b As shown, the fixing clamp 200 mainly includes a base plate 210, a fixing plate 220, a movable plate 230, and an adjusting device 240. The fixing plate 220 and the movable plate 230 are spaced apart on the base plate 210 along a first direction. The fixing plate 220 is fixedly connected to the base plate 210, and the movable plate 230 is fixedly connected to the adjusting device 240. The adjusting device 240 can drive the movable plate 230 to reciprocate along the first direction, so that the fixing plate 220 and the movable plate 230 work together to clamp and release the books and periodicals.

[0042] Optionally, a guide rail or groove extending along the first direction can be provided on the base plate 210, and a slider or guide structure can be correspondingly provided on the bottom of the movable plate 230 to ensure smooth movement and accurate positioning of the movable plate 230. The adjustment device 240 can be any one of a cylinder, hydraulic cylinder, electric push rod, or manual lead screw module to adapt to different production scenarios.

[0043] Optionally, the fixture 200 may also include multiple clamping plates 250, which are detachably connected to the inside of the fixed plate 220 and / or the movable plate 230. Their dimensions are matched to the specifications of the book to be engraved (typically slightly smaller than the book's size), thereby ensuring that the fixture 200 can stably hold the book and avoid interfering with the toolpath. Furthermore, the clamping plates 250 may be configured in various sizes to accommodate books of different dimensions.

[0044] In a specific implementation, the edges of books can be mechanically engraved using engraving equipment and an optimized engraving scheme to create a book edge relief. Specifically, the optimized engraving scheme (engraving code) can be imported into the engraving equipment and executed by its analysis and control system. This system drives the cutting tool to cut the book edge according to preset process parameters such as tool path, feed rate, step distance, depth of cut, and spindle speed, ultimately creating a book edge relief with controllable depth, sharp edges, and a smooth, delicate surface. After cutting, a dust removal device can be used to remove dust and other residues generated during the cutting process, ensuring the registration accuracy and color reproduction quality of subsequent inkjet printing processes. Optionally, the dust removal device can be a negative pressure suction dust removal device or a blow-type dust removal device.

[0045] Those skilled in the art will readily understand that the blade shape (geometry) and material of the engraving tool have a significant impact on the processing quality during the engraving process. Therefore, before mechanical engraving, appropriate engraving tools can be selected based on the paper characteristics and the pattern features of the book's edge plan, ensuring smooth cutting and effectively suppressing burrs and tearing defects. Specifically, book paper is flammable, absorbent (water-sensitive), soft and easily deformable, and has a high coefficient of friction, making it prone to rough edges and burrs. From a material compatibility perspective, diamond-coated tools and carbide tools are generally chosen. Diamond-coated tools have extremely high hardness and wear resistance, effectively reducing tool wear and friction, and can effectively reduce paper fiber adhesion and burr formation, thus improving processing accuracy and surface quality. Carbide tools (such as tungsten carbide) have high hardness and wear resistance, combining good cutting sharpness with economy, making them suitable for medium-volume production scenarios. From a blade adaptability perspective, a tapered blade can be chosen. The tapered blade's conical edge is suitable for cutting edges with a certain angle, applicable to most common book edge embossing scenarios, effectively reducing burrs and improving cut smoothness. Furthermore, for intricate text or line engraving, a V-shaped blade (pointed blade) can be selected to achieve sharp edges and clear detail. For patterns with many curves, a round-nose blade (ball-head blade) can be chosen, utilizing its rounded edge to effectively disperse cutting stress and prevent paper tearing. For thicker papers such as corrugated paper, a toothed blade (serrated blade) can be chosen, using the intermittent cutting action of the toothed edge to prevent paper deformation and delamination. For complex irregular contours, a vibrating blade or hollow blade can be chosen, using high-frequency vibration or rolling cutting methods to reduce frictional resistance and achieve precise shaping of complex forms.

[0046] In step S160: The mechanically engraved book edge is inkjet colored to form a relief pattern with a three-dimensional visual effect.

[0047] In a specific implementation, after the mechanical engraving of the book edge is completed, the fixing fixture can be transferred to the worktable of the inkjet equipment. Using the same fixing fixture to carry the book for both engraving and inkjet printing ensures that the relative position of the book remains unchanged during the transfer process, thereby guaranteeing precise registration between the inkjet pattern and the engraved relief, and achieving accurate color reproduction and a distinct decorative effect. It should be noted that the inkjet equipment is a digital inkjet printing device with visual positioning function (implemented by a visual positioning module) and high-dropout inkjet printing function. The visual positioning function can collect feature information (size, direction, position, outline, etc.) of the book edge relief in real time; the high-dropout inkjet function ensures uniform ink application and fine pattern representation on the embossed surface by adjusting the ink droplet ejection pressure, drop point compensation algorithm, and adaptive control of the distance between the printhead and the printing surface.

[0048] After the fixture is installed on the worktable of the inkjet equipment, a planar scan can be performed on any mechanically engraved edge of the book using the vision positioning module to obtain the template base shape. The template base shape refers to the two-dimensional image of the book edge relief obtained through planar scanning, which includes the outline shape of the relief, surface texture, and grayscale features corresponding to depth information, and can be used as a reference for subsequent image registration.

[0049] After obtaining the template base shape, the book edge plan view and the template base shape can be aligned to generate a texture that matches the template base shape. Specifically, image processing software (such as Adobe Photoshop) can be used to align the book edge plan view and the template base shape—by performing operations such as scaling, rotating, and transforming the book edge plan view, the book edge plan view and the template base shape are precisely aligned, and appropriate image adjustments (such as color correction, edge optimization, local trimming, etc.) are added to finally generate a texture that matches the template base shape. This texture serves as the digital image source for inkjet coloring.

[0050] After obtaining the template base shape, its feature information can be extracted, and an embossed model base plate can be established. This base plate primarily serves as the standard reference for subsequent visual registration. In a specific implementation, a comprehensive planar scan (using a visual positioning module) can be performed on the edges of the books (i.e., one or more mechanically engraved edges) in the fixture. The scan results are then compared with the embossed model base plate to identify the size, orientation, and positional deviations of each edge. Subsequently, based on the texture and the size, orientation, and positional deviations of each edge, inkjet printing is used to apply inkjet color to each edge, ensuring precise alignment between the texture and the embossed surface, ultimately forming an embossed pattern with a three-dimensional visual effect.

[0051] This invention also provides a book edge embossing processing system, which can be used to perform book edge embossing processing method 100. The book edge embossing processing system mainly includes engraving equipment, inkjet equipment, and a fixing fixture 200. The engraving equipment is a CNC engraving machine, which can analyze and execute optimized engraving schemes (engraving code) and drive engraving tools to mechanically engrave the book edge. The inkjet equipment is a digital inkjet printing device with visual positioning function (implemented by a visual positioning module) and high-drop printing function, capable of inkjet coloring the mechanically engraved book edge to form an embossed pattern with a three-dimensional visual effect. The specific structure and function of the fixing fixture have been described in detail above and will not be repeated here. Preferably, as... Figure 5 a and Figure 5As shown in b, the book edge relief processing system also includes a partition 300. The partition 300 is used to separate adjacent books in the fixing fixture 200 to prevent debris and ink mist generated during the engraving or inkjet process from contaminating each other. At the same time, it avoids adjacent books from shifting due to vibration or squeezing, ensuring the independence and positional stability of each book during the processing, thereby ensuring the engraving accuracy and inkjet registration quality.

[0052] Compared with the prior art, the embodiments of the present invention provide a method and system for processing book edge relief. By optimizing the engraving scheme, the engraving scheme can be adapted to books and periodicals with different paper characteristics, which helps to ensure the quality of subsequent mechanical engraving. By mechanically engraving the book edge, a book edge relief with controllable depth, sharp edges, and smooth and delicate surface can be formed, which is conducive to the accurate registration and color reproduction of subsequent ink spraying, completely avoiding the defects of laser edge burning and insufficient layering of mechanical printing, and enabling the mass production of high-quality book edge decoration.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing book and periodical margin relief, comprising: Convert the preset book edge plan view into a 3D depth map containing depth information; Create a 3D relief model of the book edge based on the aforementioned 3D depth map; An engraving scheme is generated based on the three-dimensional relief model, and the engraving scheme includes tool path, feed rate, step distance and depth of cut; The engraving scheme is optimized based on the paper characteristics of the book or periodical; The edges of the book are mechanically engraved according to the optimized engraving scheme. as well as The mechanically engraved edges of the book are then inkjet-painted to create a relief pattern with a three-dimensional visual effect.

2. The book edge relief processing method according to claim 1, wherein, The steps to convert a preset book edge plan view into a stereo depth map containing depth information include: The book edge planar image is processed using image processing software to extract depth and generate a depth map. The pixel brightness in the depth map is positively correlated with the depth distance. The depth map is inverted to obtain a stereo depth map, in which pixel brightness is negatively correlated with spatial depth.

3. The book edge relief processing method according to claim 1, wherein, Based on the paper characteristics of the book or periodical, the steps to optimize the engraving scheme include: The cutting depth is adjusted to 0.1-0.5 mm according to the paper characteristics of the book.

4. The book edge relief processing method according to claim 1, wherein, The feed rate includes fine carving feed rate and / or rough carving feed rate; Based on the paper characteristics of the book or periodical, the steps to optimize the engraving scheme include: Based on the paper characteristics of the book or periodical, the engraving feed speed is adjusted to 200-800 mm / min; and / or, Based on the paper characteristics of the book or periodical, the rough engraving feed speed is adjusted to 1000-1500 mm / min.

5. The book edge relief processing method according to claim 1, wherein, The step distance includes fine carving step distance and / or rough carving step distance; Based on the paper characteristics of the book or periodical, the steps to optimize the engraving scheme include: Based on the paper characteristics of the book or periodical, the engraving step distance is adjusted to 10%–30% of the tool diameter; and / or, Based on the paper characteristics of the book or periodical, the roughing step distance is adjusted to 50%–80% of the tool diameter.

6. The book edge relief processing method according to claim 1, wherein, The steps for mechanically engraving the edges of the book according to the optimized engraving scheme include: One or more books to be engraved are placed into a fixed clamp and separated by a partition; The fixing fixture is fixed to the processing station of the engraving equipment; Based on the engraving equipment and the optimized engraving scheme, the edges of the book are mechanically engraved to form an edge relief; and Dust is removed from the edges of the book after mechanical engraving.

7. The book edge relief processing method according to claim 1 further includes determining the carving tool based on the paper characteristics of the book and the pattern features of the book edge plan view.

8. The book edge relief processing method according to claim 6, wherein, The steps for inkjet coloring the mechanically engraved book edges include: Transfer the fixing fixture to the worktable of the inkjet equipment; The visual positioning module based on the inkjet equipment performs planar scanning on a mechanically engraved book edge to obtain the template base shape; Extract the feature information of the template base shape to establish the relief model base plate; The book edge plan view and the template base shape are matched to generate a texture that matches the template base shape; The visual positioning module performs a comprehensive scan of one or more mechanically engraved book edges and compares them with the relief model base plate to identify the size, direction, and positional deviation of each book edge. Based on the inkjet equipment, the texture, and the size, direction, and positional deviations of each book edge, inkjet coloring is performed on each book edge.

9. A book edge embossing system for performing the book edge embossing method according to any one of claims 1-8, the book edge embossing system comprising: The engraving equipment is configured to mechanically engrave the edges of the book according to an optimized engraving scheme. Inkjet equipment, configured to apply inkjet color to the edges of a book that have been mechanically engraved; A fixing fixture configured to hold one or more books or periodicals.

10. The book edge embossing system according to claim 9 further includes a partition for separating adjacent books.

Images