Production process of detachable slippers

Abstract

The invention discloses a production process of detachable slippers, and belongs to the technical field of shoe production, and the production process specifically comprises the following steps: setting a unified zipper combination starting point and a zipper tooth occlusion line, establishing a 3D space line model, respectively designing 3D models of a sole and an upper based on the model, synthesizing a complete shoe body, and exporting component data; shoe boards of the uppers and the soles are manufactured according to the 3D model data, zipper starting point positions and fixed installation lines are marked on the shoe boards, and marking-off boards are manufactured; all parts of an upper are cut on the shoe fabric, a fixed starting point position of an upper zipper is calibrated, a fixed installation line is marked through a marking-off plate, and a shoe sole with a line groove is manufactured; the upper zipper strip is fixed to a fixing installation line on the upper, the lower zipper strip is fixed to a shoe sole line groove, and the upper zipper strip and the lower zipper strip are installed through a reverse installation structure; the shoe upper and the shoe sole are rapidly disassembled and assembled through the upper zipper strip and the lower zipper strip, and interchange matching of the shoe sole and the shoe upper is achieved.

Description

Technical Field

[0001] The present invention relates to a production process of a detachable slipper, belonging to the technical field of shoe production. Background Art

[0002] In daily life, shoes are indispensable daily necessities for people. For traditional ordinary shoes, the sole and the upper are usually fixedly combined together, and there are many inconveniences in cleaning this structure. When the shoes need to be cleaned, they can only be cleaned as a whole, which not only consumes a lot of energy, but also is difficult to be thoroughly cleaned due to the material and structural differences between the sole and the upper, and it is easy to leave stains and bacteria, affecting the wearing experience and hygiene conditions.

[0003] With the improvement of consumers' pursuit of the quality of life, detachable slippers have emerged as the times require. Such slippers can freely disassemble and combine the sole and the upper (surface), and have significant advantages in cleaning. The sole and the upper can be cleaned specifically respectively, greatly improving the cleaning effect. At the same time, it can also meet the diverse needs of consumers, such as replacing the sole or the upper (surface) according to different occasions, seasons or personal preferences. In addition, since the zipper patterns, varieties and styles applicable to detachable slippers are rich and diverse, and combined with the combined changes of various outsoles and uppers (surfaces) being swapped with each other, it provides a broad design space for shoe designers and can create more novel and unique shoe models.

[0004] However, the production of current detachable slippers faces many challenges, and the problem of precise installation of the zipper assembly is particularly prominent, mainly reflected in the following aspects: High precision requirements for the zipper: As a relatively precise assembly, a pair of zipper tapes are firmly combined by the zipper teeth biting with each other, and its principle is similar to a pair of unfolded gears. During the production process, once the previous tooth is misaligned, the subsequent teeth will be affected and misaligned, which will directly cause the zipper to not be able to be pulled smoothly. Moreover, if any two teeth cannot be firmly bitten, the zipper after being pulled may crack, seriously affecting the quality and performance of the shoes.

[0005] Difficulty in positioning the tooth biting line: The detachable slipper is composed of half of the zipper rack on the sole and the other half of the zipper rack on the upper surface biting and combining with each other. The "tooth biting line" formed around the outer periphery of the sole from the combination starting point to the last tooth plays an important role. This biting line is a three-dimensional curve in three-dimensional space, and each point on the line is unique. Any deviation of a point will affect the pulling effect of the zipper and thus affect the quality of the shoes. During the design stage, the detachable slipper has a determined "designed tooth biting line", and in actual production, it is necessary to ensure that the "actual tooth biting line" coincides with it in order to produce qualified products that meet the design requirements. However, in the actual production process, it is difficult to achieve this goal.

[0006] Difficulty in positioning the zipper strip: One half of the zipper chain is usually a soft webbing with teeth, which is commonly known as the zipper strip. Without fixation, the zipper strip is very easy to move up and down, left and right, and bend and deform. In a section of the zipper chain fixed only at both ends, there are numerous tooth points. Without a clear positioning point as a basis, it is very difficult to accurately install and fix each tooth in actual production operations, and it is impossible to ensure that each tooth can be installed in the designed position. Taking a standard 5 nylon zipper as an example, there are more than 300 tooth points on the zipper around a size 37 shoe. If only a few tooth points are accurately positioned while ignoring the accurate positioning of other tooth points, it is simply impossible to produce qualified detachable slippers. Therefore, the traditional shoemaking technology that uses a few key positioning points cannot meet the mass production requirements of detachable slippers. Summary of the Invention

[0007] The purpose of the present invention is to provide a production process for detachable slippers to solve the problems raised in the above background technology.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions: Compared with the prior art, the present invention provides a production process for designing a detachable slipper, and the specific steps include: S1. Set a unified starting point for zipper combination and a zipper tooth biting line, establish a 3D space line model, respectively design 3D models of the sole and the upper based on the model, synthesize a complete shoe body and export component data; S2. Make shoe boards for the upper and the sole according to the 3D model data, mark the starting point position of the zipper and the fixed installation line on the shoe board, and make a special scribing board for marking the zipper installation line; S3. Cut out each part of the upper on the shoe fabric, mark the starting point position for fixing the zipper chain, mark the fixed installation line through the scribing board, and make a sole with a wire groove, and the wire groove corresponds to the zipper fixed installation line; S4. Fix the upper zipper chain on the fixed installation line on the upper, fix the lower zipper chain in the wire groove on the sole, and install the upper zipper chain and the lower zipper chain in a reverse installation structure; S5. Quickly disassemble and assemble the upper and the sole through the upper zipper chain and the lower zipper chain to realize the interchangeable matching of the sole and the upper.

[0009] Further, in the S1, after synthesizing the complete shoe body, use 3D printing technology to print and color the solid model of the complete shoe body, evaluate the solid model, and optimize and finalize according to the feedback.

[0010] Further, in the S1, the exported component data includes the materials, sizes, and structural patterns of the zipper, the sole, and the upper.

[0011] Further, in the S2, when making the shoe boards for the upper and the sole, it includes: Determine the planar shape and perimeter of the bottom according to the design style and number; Open a shoe last according to the determined bottom, design style and number; Manufacture the shoe boards for various parts of the upper, the shoe board of the sole and the scribing board of the insole based on the shoe last.

[0012] Furthermore, when manufacturing the scribing board: Calculate and mark a set of zipper starting points according to the starting point of zipper combination: Mark the accurate position of the starting point of the lower chain socket on the shoe board of the sole; Mark the starting position of the lower chain pin on the shoe board of the upper; Mark the zipper fixed installation line on the shoe board of the upper and the shoe board of the sole according to the zipper tooth engagement line.

[0013] Furthermore, in the step S4, the reverse installation structure of the upper chain and the lower chain includes: The front side of the lower chain on the sole faces outward, the back side of the upper chain on the upper faces outward, and the rack is exposed; The back side of the lower chain on the sole faces outward, the front side of the upper chain on the upper faces outward, and the rack is hidden.

[0014] Furthermore, in the step S5, an insole is arranged inside the sole, and the manufacture of the insole includes: Manufacture a die for cutting the insole according to the insole shoe board of the sole; Cut the insole fabric according to the die; Apply one of traditional materials, synthetic materials, functional materials and environmental protection materials to the insole.

[0015] Furthermore, optimize the zipper tooth engagement line before the step S1, and the specific steps include: Combine a structured light 3D scanner and a pressure sensing insole to obtain the three-dimensional shape, pressure distribution and gait characteristics of the user's foot; Convert the scanned data into a parametric model in a unified coordinate system and mark the shoe type classification label; Introduce a multi-objective genetic algorithm to establish a dynamic balance between the zipper mechanical objective and the shoe body aesthetic objective.

[0016] Furthermore, the zipper mechanical objective includes minimizing the maximum stress of zipper closure and maximizing the rack meshing efficiency, and the shoe body aesthetic objective is to construct a scoring function based on user preference data to optimize the coordination between the engagement line and the upper contour.

[0017] Furthermore, the establishment of the dynamic balance includes: Curvature adaptive adjustment: According to the curvature radius of the upper, dynamically generate the engagement line path through a Bezier curve to ensure uniform contact of the rack meshing surface; Optimization of stress distribution: Based on ANSYS Workbench for finite element analysis, apply a zipper closing force of 50N ± 5%. Adjust the inclination angle of the occlusal line through the gradient descent algorithm. When the maximum stress change is less than 0.5MPa per iteration, terminate the iteration to reduce the maximum stress to less than 30% of the compressive strength of the material.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: By setting a unified starting point for zipper combination and the occlusal line of zipper teeth, a 3D space line model is established, ensuring the accuracy of the zipper installation position from the design source. During the production process of the shoe board and the scribing board, accurately calibrate the starting point and the fixed installation line of the zipper, effectively solving the problem of difficult positioning of the zipper cloth strip and greatly improving the installation accuracy of the zipper; By installing the upper pull chain and the lower pull chain in a reverse installation structure, more attention is paid to the overall aesthetics and simplicity of the shoes, avoiding the risk of scratching and wear that may be caused by the exposure of the rack. During the installation process, professional fixing tools and glue should be used to ensure that the zipper is firmly installed without loosening or displacement; Verified by finite element analysis and physical tests, this process can improve the uniformity of the contact pressure distribution of the zipper teeth by 27%, and the coefficient of variation decreases from 0.38 to 0.28, significantly reducing the failure risk caused by local stress concentration. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is the process flow chart of the present invention. Detailed Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figure 1 , the present invention provides a technical solution: A production process for a detachable slipper, the specific steps include: The specific steps include: S1. Set a unified starting point for zipper combination and a zipper tooth engagement line, establish a 3D space line model. Based on this model, conduct detailed 3D designs for the sole and the upper respectively, fully considering factors such as the thickness, material properties, anti-slip patterns of the sole, and the style, height, material flexibility, etc. of the upper. After completing the 3D model designs of the sole and the upper, combine the two into a complete shoe body model and export component data. These data cover key information such as the materials, sizes, and structural patterns of the zipper, sole, and upper. To ensure the accuracy and rationality of the design, after synthesizing the complete shoe body, use 3D printing technology to print and color the physical model of the complete shoe body. Through evaluating the physical model, collect feedback from professionals and potential users, and optimize the design according to the feedback results until the final draft is finalized; S2. Make shoe boards for the upper and the sole according to the 3D model data exported in S1. First, accurately determine the planar shape and perimeter of the sole based on the design style and number. The design of the planar shape of the sole should comprehensively consider the principles of ergonomics to ensure wearing comfort and stability; the determination of the perimeter should be accurate to the millimeter level to ensure the adaptability between the sole and the upper. Then, open a last according to the determined sole shape, design style, and number. The design of the last should simulate the natural shape of the human foot and consider the differences in different sizes and foot shapes. Finally, make shoe boards for each part of the upper, the shoe board of the sole, and the scribing board of the insole according to the last. During the production of the scribing board, accurately calculate according to the starting point of zipper combination and mark a set of starting points for the zipper. Accurately mark the starting point of the lower chain socket on the shoe board of the sole, with the accuracy controlled within ±0.5 mm; mark the starting point of the lower chain pin on the shoe board of the upper. At the same time, according to the zipper tooth engagement line, respectively mark the zipper fixed installation lines on the shoe board of the upper and the shoe board of the sole to ensure the accuracy and consistency of the installation lines; S3. On the shoe fabric, cut according to the design dimensions and shapes of each part of the upper to obtain components for each part of the upper, and accurately mark the starting points for fixing the upper chain on the components. Use the prepared scribing board to mark the fixed installation lines on the upper components to ensure the accurate position of the installation lines. At the same time, make a sole with a groove for the zipper. The position of the groove should correspond precisely to the zipper fixed installation line. The depth and width of the groove should be designed according to the specifications of the zipper to ensure that the zipper can be tightly embedded in the groove without affecting the structural strength and stability of the sole; S4. Fix the upper pulling chain to the fixing installation line on the shoe upper, and fix the lower pulling chain in the shoe bottom groove. The upper pulling chain and the lower pulling chain are installed using a reverse installation structure, and the reverse installation structure includes two methods: one is that the front side of the lower pulling chain on the shoe bottom faces outward, and the back side of the upper pulling chain on the shoe upper faces outward, with the rack exposed. This method is suitable for the design requirements of those who pursue fashion and personality and hope to show the characteristics of the zipper; the other is that the back side of the lower pulling chain on the shoe bottom faces outward, and the front side of the upper pulling chain on the shoe upper faces outward, with the rack hidden. This method pays more attention to the overall aesthetics and simplicity of the shoes, avoiding the risks of scratching and wear that may be caused by the exposure of the rack. During the installation process, professional fixing tools and glue should be used to ensure that the zipper is firmly installed without loosening or displacement; S5. Quickly disassemble and assemble the shoe upper and the shoe sole through the upper pulling chain and the lower pulling chain to achieve the interchangeable matching of the shoe sole and the shoe upper.

[0023] In S5, a lining is provided inside the shoe sole, and the production of the lining includes: According to the lining shoe board of the shoe sole, make a die for cutting the lining. The precision of the die should reach ±0.1 mm to ensure the accurate size of the cut lining; Cut the lining fabric according to the die. During the cutting process, the flatness of the fabric should be ensured to avoid wrinkles and deviations; Apply one of traditional materials, synthetic materials, functional materials, and environmental protection materials on the lining. Select appropriate materials according to different product positioning and functional requirements. For example, select a functional material with antibacterial and deodorant functions to improve the hygiene performance of the shoes; Select environmental protection materials to meet the pursuit of modern consumers for environmental protection products.

[0024] Optimize the zipper tooth bite line before step S1. The specific steps include: Combine a structured light 3D scanner and a pressure sensing insole to obtain the three-dimensional shape, pressure distribution, and gait characteristics of the user's foot; Convert the scanned data into a parametric model in a unified coordinate system and label the shoe type classification label; Introduce a multi-objective genetic algorithm to establish a dynamic balance between the zipper mechanical objective and the shoe body aesthetic objective.

[0025] The zipper mechanical objective includes minimizing the maximum stress of zipper closure and maximizing the rack meshing efficiency. The shoe body aesthetic objective is to construct a scoring function based on user preference data and optimize the coordination between the bite line and the upper surface contour.

[0026] Specifically, in this embodiment, the parameter settings of the multi-objective genetic algorithm include: Population size: 200 individuals; Number of iterations: 500 generations; Crossover probability: 0.85; Mutation probability: 0.02; Fitness function:

[0027] Wherein, is the maximum contact stress; is the aesthetic score, using 0-1 standardization; Elite retention strategy: Retain the top 10% of the optimal solutions in each generation.

[0028] The establishment of the dynamic balance includes: Curvature adaptive adjustment: According to the curvature radius of the shoe upper, dynamically generate the meshing path through the Bezier curve to ensure uniform contact of the rack meshing surface.

[0029] When calculating the meshing path: Let the curvature radius of the shoe upper be R (unit: mm), obtained by a laser scanner, and define the meshing path using a cubic Bezier curve:

[0030]

[0031] Where the control points , , , The relationship with R

[0032] Parameter determination rule: Arc length matching:

[0033] Curvature constraint:

[0034] Wherein, represents the spatial coordinate point on the curve corresponding to the parameter ; represents the time parameter in the curve generation process, corresponding to 1 / 4 of the gait cycle, = 0 corresponds to the initial contact point between the sole and the shoe upper, = 1 corresponds to the fully closed state; , , , respectively represent the four control points of the cubic Bezier curve, where is the starting point, is the ending point, and the rest are shape control points; 、 Represents the coordinate components of the shape control points, which are used to control the bending direction and curvature of the curve; Represents the height parameter, which is used to describe the vertical position of the occlusion line in three-dimensional space; Is the proportionality coefficient.

[0035] Dynamic adjustment formula Optimize the control points by the least squares method:

[0036] Among them, Is the actual sampling point on the shoe upper surface; Is the regularization coefficient; Is the number of sampling points.

[0037] The rack contact pressure distribution satisfies:

[0038] Optimize the variables by the variational method, Objective function:

[0039] Constraint conditions: ;

[0040] Among them, Is the theoretical meshing center line; Is to minimize the variance of the pressure distribution; Represents the contact pressure of the rack at position in Pa; The zipper closing force ≤ 50 N, which directly affects the maximum pressure value; The rack width, which affects the integration range of the pressure distribution; In, the Dirac δ function, indicating that the pressure acts only concentratedly at ; The maximum allowable contact pressure on the rack surface, which is determined by the compressive strength of the material.

[0041] The amplitude of , is the safety design threshold.

[0042] Rack width An increase will reduce The maximum value of, but may sacrifice the meshing efficiency.

[0043] By precisely controlling The distribution pattern of And the constraints of, the uniformity of the contact pressure can be increased by 27%, It can avoid the rack fracture caused by local overload; the optimization based on ensures stable long-term use performance.

[0044] Stress distribution optimization: Based on ANSYS Workbench for finite element analysis, apply a zipper closing force of 50N ± 5%, adjust the inclination angle of the bite line through the gradient descent algorithm, and terminate the iteration when the maximum stress change is less than 0.5MPa / time, so that the maximum stress is reduced to less than 30% of the material's compressive strength. Specifically, establish a parametric model in ANSYS; write a Python script to implement gradient calculation and parameter update; verify the reliability of the optimization results through "Design Xplorer" of Workbench.

[0045] In one embodiment: Taking a common summer sandal style as an example, set a unified starting point for zipper combination and a zipper tooth bite line. Use professional 3D modeling software, such as SolidWorks, to establish a 3D space line model. According to the design requirements, design a sole with a thickness of 15 mm, made of EVA material, with anti-slip patterns; the shoe upper is a simple thong style, with a height of 30 mm, made of soft PVC material. After synthesizing the complete shoe body, use 3D printing technology to print out a physical model and color it. Invite professional shoe designers and some consumers to conduct evaluations. According to the feedback, fine-tune the anti-slip patterns on the sole to increase its friction, and then finalize and export component data such as the materials, sizes, and structural patterns of the zipper, sole, and shoe upper. According to the exported 3D model data, determine that the bottom plane shape is an arch suitable for the human foot, with a circumference of 240 mm. Open a last according to the design style and size, and make shoe boards for each part of the shoe upper, a shoe board for the sole, and a scribing board for the insole based on the last. During the production of the scribing board, accurately calculate and mark the starting point of the zipper. Accurately mark the starting point of the lower chain socket on the sole shoe board, and mark the starting point of the lower chain pin on the shoe upper shoe board. At the same time, according to the zipper tooth bite line, respectively mark the zipper fixed installation lines on the shoe upper shoe board and the sole shoe board. On the selected PVC shoe fabric, cut according to the design dimensions of each part of the shoe upper to obtain shoe upper components, and accurately mark the starting point of the upper chain fixation on the components. Use the scribing board to mark the fixed installation line on the shoe upper components. At the same time, make an EVA sole with a wire groove, the depth of the wire groove is 3 mm, the width is 5 mm, and it corresponds precisely to the zipper fixed installation line. Install the zipper (S4): Select the reverse installation structure where the front side of the lower pull chain of the shoe sole faces outward and the back side of the upper pull chain of the shoe upper faces outward, with the rack exposed. Use special glue to firmly fix the upper pull chain to the fixed installation line on the shoe upper, embed the lower pull chain into the shoe sole groove and fix it to ensure that the zipper is firmly installed without loosening; Quickly disassemble and assemble the shoe upper and the shoe sole through the upper pull chain and the lower pull chain to achieve the interchangeable matching of the shoe sole and the shoe upper. Make a knife mold according to the insole shoe board of the shoe sole, cut the cotton insole fabric, and apply a functional material with breathable and sweat-absorbing functions on the insole to complete the production of the detachable slipper.

[0046] In another embodiment: Design a high-end detachable slipper suitable for sports scenarios, set a unified zipper combination starting point and zipper tooth bite line, use 3D modeling software to establish a 3D space line model. The shoe sole is made of high-performance rubber material with a thickness of 20 mm, having good shock absorption and anti-slip performance; the shoe upper is made of breathable mesh fabric with a height of 40 mm, conforming to the foot shape during human movement. After synthesizing the complete shoe body, conduct 3D printing and evaluation, optimize the mesh structure of the shoe upper according to the feedback to improve breathability, and then finalize and export the component data; According to the 3D model data, determine that the bottom plane shape is a special shape conforming to sports mechanics with a perimeter of 250 mm, open the last and make the shoe board and the marking board. During the production process of the marking board, accurately calibrate the starting point of the zipper and the fixed installation line to ensure the accuracy of the zipper installation; Cut out the shoe upper parts from the breathable mesh shoe fabric, calibrate the starting point of the upper pull chain fixation and mark the fixed installation line, make a rubber shoe sole with a wire groove. The wire groove is specially designed to better fix the zipper and ensure its stability during movement; Adopt the reverse installation structure where the back side of the lower pull chain of the shoe sole faces outward and the front side of the upper pull chain of the shoe upper faces outward, with the rack hidden. Use high-strength glue and professional tools to install the zipper in place to ensure that the zipper will not malfunction during movement; Achieve the quick disassembly, assembly and interchangeable matching of the shoe sole and the shoe upper. Make a knife mold according to the insole shoe board of the shoe sole, cut the special antibacterial and deodorant insole fabric, and apply an environmentally friendly antibacterial material on the insole to complete the production of the high-end functional detachable slipper.

[0047] In the actual application of the production process of the detachable slipper of the present invention, according to different product positions and market demands, the specific parameters and material selections of each step can be flexibly adjusted to produce diversified and high-quality detachable slipper products. At the same time, the production process of the present invention is not only applicable to the styles in the above embodiments, but also can be widely applied to the production of other various styles of detachable slippers, with strong versatility and practicability.

[0048] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for detachable slippers, characterized in that: The specific steps include: S1. Setting a unified zipper joint starting point and zipper teeth bite line, establishing a 3D space line model, designing 3D models of the sole and upper based on the model, synthesizing a complete shoe body and exporting component data; S2. Make the shoe plate of the upper and the sole according to the 3D model data, mark the zipper starting point and the fixed installation line on the shoe plate, and make a special marking plate for marking the zipper installation line; S3, cutting out various parts of the upper from the shoe fabric, marking the fixed starting point of the upper zipper, marking the fixed installation line through a marking board, and making a sole with a wire groove, the wire groove corresponds to the fixed installation line of the zipper; S4, fix the upper chain to the fixed installation line on the upper, fix the lower chain to the bottom groove of the shoe, and install the upper chain and the lower chain in a reverse installation structure; S5. The upper and the sole are quickly disassembled by pulling up and pulling down the chain, so that the sole and the upper can be interchanged.

2. The production process of a detachable slipper according to claim 1, characterized in that: In S1, after the complete shoe body is synthesized, a physical model of the complete shoe body is printed and colored using 3D printing technology, the physical model is evaluated, and optimized and finalized based on feedback.

3. The production process of a detachable slipper according to claim 1, characterized in that: In S1, the derived component data include the material and size of the zipper, the sole and the upper, and the structural mode.

4. The production process of a detachable slipper according to claim 1, characterized in that: In said S2, when manufacturing the shoe upper and the shoe sole, it includes: Determine the bottom plane shape and perimeter according to the design style and number; Make the shoe last according to the determined base shape, design style and number; The shoe plates for each part of the upper, the shoe plates for the sole and the marking plates for the lining are made according to the last.

5. The production process of detachable slippers according to claim 4, characterized in that: When making the scribed board: Calculate and calibrate the starting point of a group of zippers according to the starting point of the zipper combination: Mark the exact starting point of the pull-down chain socket on the sole and shoe board; Mark the starting position of the pull-down chain pin on the upper and shoe plate; According to the zipper teeth bite line, the zipper fixing and installation line is marked on the upper shoe board, and the zipper fixing and installation line is marked on the sole shoe board.

6. The production process of detachable slippers according to claim 1, characterized in that: In the above S4, the reverse installation structure of the upper chain and the lower chain includes: The front of the chain under the sole faces outward, the back of the chain on the upper faces outward, and the racks are exposed; The back of the chain under the sole faces outward, the front of the chain on the upper faces outward, and the racks are hidden.

7. The production process of detachable slippers according to claim 1, characterized in that: In S5, a substrate is provided in the sole, and the manufacturing of the substrate includes: A cutting die for cutting the substrate is made according to the substrate shoe plate of the sole; Cut the substrate fabric according to the knife die; One of traditional materials, synthetic materials, functional materials and environmentally friendly materials is applied to the substrate.

8. The production process of detachable slippers according to claim 1, characterized in that: Before the step S1, the zipper teeth bite line is optimized, and the specific steps include: Combine structured light 3D scanners with pressure sensing insoles to obtain the user's foot 3D shape, pressure distribution, and gait characteristics; Convert the scanned data into a parametric model in a unified coordinate system and label the shoe type classification; A multi-objective genetic algorithm is introduced to establish a dynamic balance between the zipper mechanics objectives and the shoe body aesthetics objectives.

9. The production process of detachable slippers according to claim 8, characterized in that: The zipper mechanical objectives include minimizing the maximum zipper closure stress and maximizing the rack meshing efficiency, and the shoe body aesthetics objectives are to construct a scoring function based on user preference data to optimize the coordination between the bite line and the upper contour.

10. The production process of detachable slippers according to claim 8, characterized in that: The establishment of the dynamic balance includes: Adaptive curvature adjustment: According to the curvature radius of the shoe upper, the bite line path is dynamically generated through the Bezier curve to ensure uniform contact between the rack meshing surfaces; Stress distribution optimization: Finite element analysis was performed based on ANSYS Workbench, and a zipper closing force of 50N±5% was applied. The inclination of the bite line was adjusted by the gradient descent algorithm. The iteration is terminated when the stress is less than 0.5MPa / time, so that the maximum stress is reduced to less than 30% of the material compressive strength.

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