Production process of detachable slippers

Abstract

The application discloses a production process of a detachable slipper and belongs to the technical field of shoe production, and the specific steps comprise the following steps: setting a unified zipper combination starting point and zipper tooth occlusion line, establishing a 3D space line model, designing 3D models of a shoe sole and a shoe upper based on the model, synthesizing a complete shoe body and exporting component data; manufacturing shoe plates of the shoe upper and the shoe sole according to the 3D model data, calibrating a zipper starting point and a fixed installation line on the shoe plate, and manufacturing a scribing plate; cutting each part of the shoe upper on the shoe surface material, calibrating a fixed starting point of an upper zipper, marking a fixed installation line through the scribing plate, and manufacturing a shoe sole with a line groove; fixing the upper zipper to the fixed installation line on the shoe upper, fixing a lower zipper in the line groove of the shoe sole, and installing the upper zipper and the lower zipper in a reverse installation structure; and quickly detaching and assembling the shoe upper and the shoe sole through the upper zipper and the lower zipper, so that the shoe sole and the shoe upper can be exchanged and matched.

Description

TECHNICAL FIELD

[0001] The present application relates to a production process of a detachable slipper, belonging to the technical field of footwear production. BACKGROUND

[0002] In daily life, shoes are indispensable daily necessities for people. In traditional ordinary shoes, the soles and uppers are usually fixedly combined together. This structure has many inconveniences when cleaning. When the shoes need to be cleaned, they can only be cleaned as a whole. This not only consumes a lot of energy, but also is difficult to clean thoroughly due to the material and structural differences between the soles and uppers, which can easily leave stains and bacteria, affecting the wearing experience and sanitary condition.

[0003] With the improvement of consumers' pursuit of life quality, detachable slippers have emerged as the times require. This kind of slippers can randomly disassemble and assemble the soles and uppers (facing), which has a significant advantage in cleaning. The soles and uppers can be cleaned separately, greatly improving the cleaning effect. At the same time, it can also meet the diversified needs of consumers, such as replacing the soles or uppers (facing) according to different occasions, seasons or personal preferences. In addition, due to the rich variety and style of zippers suitable for detachable slippers, combined with the exchange of various outsoles, uppers (facing), it provides a wide design space for footwear designers, and can create more novel and unique shoe models.

[0004] However, the production of detachable slippers currently faces many challenges, among which the precise installation of the zipper assembly is particularly prominent, mainly in the following aspects:

[0005] High precision requirement of zipper: as a relatively precise combination, a pair of zipper strips is firmly combined by interlocking with zipper teeth, whose principle is similar to a pair of unfolded gears. In the production process, once the first chain tooth is misaligned, the subsequent chain teeth will be misaligned, which will directly lead to the zipper not being able to be smoothly pulled together. Moreover, if any two chain teeth cannot be firmly interlocked, the pulled zipper may crack, seriously affecting the quality and performance of the shoes.

[0006] Difficulty in positioning the chain tooth engagement line: The detachable slippers are combined by half of the chain tooth on the shoe sole and the other half of the chain tooth on the upper. From the starting point to the last chain tooth, the "chain tooth engagement line" formed around the outer periphery of the shoe sole plays an important role. The engagement line is a three-dimensional curve in space, and each point on the line has uniqueness. Any deviation of a point will affect the engagement effect of the zipper and further affect the quality of the shoe. In the design stage, the detachable slippers have a certain "design chain tooth engagement line", and in actual production, the "actual chain tooth engagement line" needs to be ensured to coincide with it, so as to produce qualified products meeting the design requirements. However, it is difficult to achieve this goal in actual production.

[0007] Difficulty in positioning the chain strip: The half of the chain strip is usually a soft woven tape with chain teeth, commonly known as chain strip. In the unfixed state, the chain strip is very easy to move up and down and left and right and to bend and deform. In a section of chain strip fixed at both ends, there are numerous chain tooth points. Without clear positioning points as a basis, it is difficult to accurately install and fix each chain tooth in actual production operation, and it is also impossible to ensure that each chain tooth can be installed at the designed position. Taking a standard 5 nylon zipper as an example, there are more than 300 chain tooth points on the zipper around a 37-inch shoe. If only a few tooth point positions are accurately positioned, and the accurate positioning of other chain tooth points is ignored, it is impossible to produce qualified detachable slippers. Therefore, the traditional shoemaking technology of using a few key positioning points cannot meet the batch production needs of detachable slippers. SUMMARY

[0008] The purpose of the present application is to provide a production process for detachable slippers to solve the problems raised in the background art.

[0009] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0010] Compared with the prior art, the application provides a production process of a detachable slipper, and the specific steps include the following: S1, setting a unified zipper combination starting point and zipper tooth occlusion line, establishing a 3D space line model, designing 3D models of a shoe sole and a shoe upper based on the model, synthesizing a complete shoe body and exporting component data; S2, manufacturing shoe plates of the shoe upper and the shoe sole according to the 3D model data, marking a zipper starting point and a fixed installation line on the shoe plate, manufacturing a special marking plate for marking the zipper installation line; S3, cutting out shoe upper parts on the shoe upper material, marking a fixed zipper starting point, marking a fixed installation line through the marking plate, manufacturing a shoe sole with a line groove, and the line groove corresponds to the fixed installation line of the zipper; S4, fixing the upper zipper on the fixed installation line of the shoe upper, fixing the lower zipper in the line groove of the shoe sole, and the upper zipper and the lower zipper are installed in a reverse installation structure; S5, quickly disassembling and assembling the shoe upper and the shoe sole through the upper zipper and the lower zipper, and realizing the exchange and matching of the shoe sole and the shoe upper.

[0011] Further, in the S1, after synthesizing the complete shoe body, the 3D printing technology is used to print and color the entity model of the complete shoe body, the entity model is evaluated, and the feedback is optimized and finalized.

[0012] Further, in the S1, the exported component data includes the materials and sizes and structure modes of the zipper, the shoe sole and the shoe upper.

[0013] Further, in the S2, when the shoe plates of the shoe upper and the shoe sole are manufactured, the following steps are included:

[0014] According to the design style and number, the bottom plane shape and the circumference are determined;

[0015] According to the determined bottom type, the design style and the number, a last is established;

[0016] According to the last, shoe plates of each part of the shoe upper, shoe plates of the shoe sole and marking plates of the lining are manufactured.

[0017] Further, when the marking plate is manufactured:

[0018] According to the zipper combination starting point, a group of zipper starting point positions are calculated and marked:

[0019] The accurate point position of the lower zipper socket starting point is marked on the shoe sole plate;

[0020] The lower zipper plug starting point is marked on the shoe upper plate;

[0021] According to the zipper tooth occlusion line, the zipper fixed installation line is marked on the shoe upper plate, and the zipper fixed installation line is marked on the shoe sole plate.

[0022] Further, in the S4, the reverse installation structure of the upper zipper and the lower zipper includes:

[0023] The zipper on the sole faces outwards, while the zipper on the upper faces outwards, with the toothed strips exposed.

[0024] The back of the zipper on the sole faces outwards, while the front of the zipper on the upper faces outwards, and the toothed strip is hidden.

[0025] Furthermore, in S5, a substrate is provided inside the sole, and the substrate is manufactured by:

[0026] A die-cutting mold is made based on the lining of the shoe sole.

[0027] The substrate fabric is cut according to the die-cutting mold;

[0028] One of the following materials can be applied to a substrate: traditional material, synthetic material, functional material, or environmentally friendly material.

[0029] Furthermore, prior to step S1, the zipper tooth engagement line is optimized, specifically including the following steps:

[0030] By combining a structured light 3D scanner with a pressure-sensing insole, the three-dimensional shape of the user's foot, pressure distribution, and gait characteristics can be obtained.

[0031] The scanned data is converted into a parametric model in a unified coordinate system and labeled with shoe type classification tags;

[0032] A multi-objective genetic algorithm is introduced to establish a dynamic balance between the mechanical objectives of the zipper and the aesthetic objectives of the shoe body.

[0033] Furthermore, the zipper mechanical objectives include minimizing the maximum stress during zipper closure and maximizing the meshing efficiency of the rack and pinion, while the shoe aesthetic objectives involve constructing a scoring function based on user preference data to optimize the coordination between the bite line and the shoe upper contour.

[0034] Furthermore, the establishment of the dynamic equilibrium includes:

[0035] Curvature adaptive adjustment: Based on the curvature radius of the shoe upper, the bite line path is dynamically generated through Bézier curves to ensure uniform contact of the rack meshing surface;

[0036] Stress distribution optimization: Finite element analysis was performed using ANSYS Workbench. A zipper closing force of 50N ± 5% was applied, and the bite line inclination angle was adjusted using the gradient descent algorithm. The maximum stress change was then calculated. The iteration is terminated when the pressure is less than 0.5 MPa / cycle, so that the maximum stress is reduced to less than 30% of the material's compressive strength.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] By setting a unified zipper joint starting point and zipper tooth occlusion line, a 3D space line model is established, ensuring the accuracy of the zipper installation position from the design source. During the process of making shoe plates and marking plates, the zipper starting point and fixed installation line are accurately calibrated, effectively solving the problem of difficult positioning of the zipper cloth strip, and greatly improving the precision of zipper installation.

[0039] By installing the upper zipper strip and the lower zipper strip in a reverse installation structure, more attention is paid to the overall beauty and simplicity of the shoes, avoiding the risk of scratches and wear caused by exposed teeth. During installation, professional fixing tools and glue are used to ensure that the zipper is firmly installed and will not loosen or shift.

[0040] Through finite element analysis and physical testing verification, the process can improve the uniformity of zipper tooth contact pressure distribution by 27%, and the coefficient of variation is reduced from 0.38 to 0.28, significantly reducing the risk of failure caused by local stress concentration. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in these drawings without creative labor.

[0042] Figure 1 The process flowchart of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0044] Please refer to Figure 1 The present application provides a technical solution:

[0045] A production process of a detachable slipper, the specific steps include:

[0046] S1, set a unified zipper combination starting point and zipper tooth occlusion line, establish a 3D space line model, based on the model, respectively, the sole and the upper are designed in detail, fully considering the thickness of the sole, material properties, anti-skid lines, and the style, height, material flexibility of the upper, etc. After completing the 3D model design of the sole and the upper, the two are combined into a complete shoe model, and the part data is exported, which covers the key information such as the material, size and structure mode of the zipper, sole and upper. In order to ensure the accuracy and reasonableness of the design, after synthesizing the complete shoe body, the 3D printing technology is used to print and color the physical model of the complete shoe body, the feedback opinions of professionals and potential users are collected through the evaluation of the physical model, and the design is optimized according to the feedback results until the final draft;

[0047] S2, according to the 3D model data exported in S1, the shoe plate of the upper and the sole is made, first, according to the design style and number, the bottom plane shape and circumference are accurately determined, the design of the bottom plane shape should consider the ergonomics principle to ensure the comfort and stability of wearing; The determination of the circumference should be accurate to the millimeter level to ensure the adaptability of the sole and the upper, then, according to the determined bottom type, design style and number, the last is opened, the design of the last should simulate the natural form of human foot, considering the difference of different sizes and foot types, finally, according to the last, the shoe plate of each part of the upper, the shoe plate of the sole and the scribing plate of the lining are made, during the scribing plate making process, according to the zipper combination starting point, 1 set of zipper starting point is calibrated; The point of the lower zipper strip socket starting point is accurately calibrated on the sole plate, the accuracy is controlled within ± 0.5mm; The lower zipper strip pin starting point is calibrated on the upper plate; At the same time, according to the zipper tooth occlusion line, the zipper fixed installation line is calibrated on the upper plate and the sole plate respectively, to ensure the accuracy and consistency of the installation line;

[0048] S3, according to the design size and shape of each part of the upper, the upper parts are obtained by cutting the upper material, and the upper zipper strip fixed starting point is accurately calibrated on the parts, the fixed installation line is marked on the upper parts by using the prepared scribing plate, to ensure the accurate position of the installation line, at the same time, the sole with line groove is made, the position of the line groove should be accurately corresponding to the zipper fixed installation line, the depth and width of the line groove should be designed according to the specifications of the zipper, to ensure that the zipper can be closely embedded in the line groove, and the structure strength and stability of the sole will not be affected;

[0049] S4, fixing the upper zipper on the fixing installation line of the upper, and fixing the lower zipper in the groove of the sole, the upper zipper and the lower zipper are installed in reverse installation structure, which includes two ways: one is that the front of the lower zipper of the sole faces outward, the back of the upper zipper of the upper faces outward, and the rack is exposed, which is suitable for the design requirement of pursuing fashion personality and displaying the characteristics of the zipper; the other is that the back of the lower zipper of the sole faces outward, the front of the upper zipper of the upper faces outward, and the rack is hidden, which pays more attention to the overall beauty and simplicity of the shoes, avoiding the risk of scratching and wear caused by the exposure of the rack, and professional fixing tools and glue are used in the installation process to ensure that the zipper is installed firmly and will not be loose or dislocated;

[0050] S5, the upper and the sole are quickly disassembled and assembled through the upper zipper and the lower zipper, realizing the exchange and matching of the sole and the upper.

[0051] In S5, a substrate is arranged in the sole, and the manufacturing of the substrate includes:

[0052] According to the substrate of the sole, a cutter die is made for cutting the substrate, and the accuracy of the cutter die reaches ±0.1 mm, ensuring the accuracy of the size of the cut substrate;

[0053] The substrate fabric is cut according to the cutter die, and the flatness of the fabric is ensured to avoid wrinkles and deviations;

[0054] One of traditional materials, synthetic materials, functional materials and environmentally friendly materials is pasted on the substrate, and appropriate materials are selected according to different product positioning and functional requirements, for example, functional materials with antibacterial and deodorizing functions are selected to improve the sanitary performance of the shoes;

[0055] The environmentally friendly material is selected to meet the pursuit of modern consumers for environmentally friendly products.

[0056] The optimization of the zipper tooth occlusion line is carried out before S1, and the specific steps include:

[0057] Combined with a structured light 3D scanner and a pressure sensing insole, the three-dimensional shape, pressure distribution and gait characteristics of the user's foot are obtained;

[0058] The scanned data is converted into a parameterized model in a unified coordinate system, and a shoe type classification label is labeled;

[0059] A multi-objective genetic algorithm is introduced to establish a dynamic balance between the zipper mechanical target and the shoe body aesthetic target.

[0060] The zipper mechanical target includes minimizing the maximum stress of the closed zipper and maximizing the rack engagement efficiency, and the shoe body aesthetic target is a scoring function based on user preference data, which optimizes the coordination of the occlusion line and the shoe surface profile.

[0061] Specifically, in the present embodiment, the multi-objective genetic algorithm parameter setting includes:

[0062] Population size: 200 individuals;

[0063] Number of iterations: 500 generations;

[0064] Crossover probability: 0.85;

[0065] Mutation probability: 0.02;

[0066] Fitness function:

[0067] Where, is the maximum contact stress; is the aesthetic score, standardized to 0-1;

[0068] Elite retention strategy: retain the top 10% of solutions in each generation.

[0069] The establishment of the dynamic balance includes:

[0070] Curvature adaptive adjustment: according to the curvature radius of the upper, the occlusal line path is dynamically generated through the Bezier curve to ensure uniform contact of the rack meshing surface.

[0071] When calculating the occlusal line path:

[0072] Let the curvature radius of the upper be R (unit: mm), which is obtained by a laser scanner, and define the occlusal line path using a cubic Bezier curve:

[0073]

[0074]

[0075] Where the control points , , , are related to R

[0076]

[0077] Parameter determination rules:

[0078] Arc length matching:

[0079]

[0080] Curvature constraint:

[0081]

[0082] Where, denotes the parameter the spatial coordinate point on the corresponding curve; denotes the time parameter in the curve generation process, corresponding to 1 / 4 of the gait cycle, =0 corresponds to the initial contact point of the sole and the upper, =1 corresponds to the fully closed state; , , , represent the four control points of the cubic Bezier curve, respectively, wherein is the starting point, is the end point, and the rest are shape control points; , denote the coordinate components of the shape control points, which are used to control the bending direction and curvature of the curve; denotes the height parameter, which is used to describe the vertical position of the occlusal line in three-dimensional space; is a proportionality coefficient.

[0083] Dynamic adjustment formula

[0084] Optimize the control points by least squares method:

[0085]

[0086] wherein, is the actual upper surface sampling point; is the regularization coefficient; is the number of sampling points.

[0087] The rack contact pressure distribution satisfies:

[0088]

[0089] Optimize the variable by variational method,

[0090] Objective function:

[0091]

[0092] Constraint condition:

[0093] ;

[0094]

[0095] wherein, is the theoretical meshing center line; is the minimum variance of the pressure distribution; denotes the contact pressure of the rack at position , unit: pa; Zipper closing force ≤ 50N, directly affecting the maximum pressure value; Rack width, integral range of pressure distribution; In this case, the Dirac delta function, indicates that the pressure is concentrated only at ; Maximum allowable contact pressure on the rack surface, determined by the compressive strength of the material.

[0096] The amplitude of the force directly depends on the zipper closure force , Is the safety design threshold.

[0097] Rack width Increases reduce the maximum value of , but may sacrifice engagement efficiency.

[0098] By precisely controlling the distribution form of and the constraints of , the uniformity of contact pressure can be improved by 27% , which can avoid rack fracture caused by local overload; based on the optimization of , it ensures stable performance in long-term use.

[0099] Stress distribution optimization: based on ANSYS Workbench for finite element analysis, apply 50N±5% zipper closure force, adjust the occlusal line angle by gradient descent algorithm, when the maximum stress change <0.5MPa / time, terminate iteration, reduce the maximum stress to below 30% of the compressive strength of the material, specifically, establish a parametric model in ANSYS; write Python script to realize gradient calculation and parameter update; verify the reliability of the optimization results through Workbench "Design Xplorer".

[0100] In an embodiment:

[0101] Take a common summer flip-flop style as an example, set a uniform zipper joint starting point and zipper tooth occlusal line, use professional 3D modeling software such as SolidWorks to establish a 3D space line model, according to design requirements, design a shoe sole thickness of 15mm, made of EVA material, with anti-skid pattern; the upper is a simple flip-flop style, with a height of 30mm, made of soft PVC material, after synthesizing the complete shoe body, use 3D printing technology to print out the physical model and color it, invite professional footwear designers and some consumers to evaluate, according to the feedback, adjust the anti-skid pattern of the shoe sole to increase its friction, then finalize and export the component data of the zipper, shoe sole and upper, material, size and structure mode, etc.

[0102] According to the derived 3D model data, the bottom plane shape is determined to be an arch shape suitable for human feet, the circumference is 240 mm, the last is opened according to the design style and size, the shoe plate of each part of the upper, the shoe plate of the sole and the marking plate of the lining are made, the starting point of the zipper is accurately calculated and marked during the marking plate making process, the starting point of the lower zipper socket is accurately marked on the sole shoe plate, and the starting point of the lower zipper plug is marked on the upper shoe plate. According to the zipper tooth occlusion line, the zipper fixed installation line is marked on the upper shoe plate and the sole shoe plate respectively;

[0103] On the selected PVC shoe material, cut according to the design size of each part of the upper to obtain the upper part, and accurately mark the starting point of the upper zipper on the part. Use the marking plate to mark the fixed installation line on the upper part. At the same time, make an EVA sole with a wire slot, the depth of the wire slot is 3 mm, and the width is 5 mm, which accurately corresponds to the fixed installation line of the zipper.

[0104] Install the zipper (S4): Choose the lower zipper of the sole with the front outward, and the upper zipper of the upper with the back outward, and the reverse installation structure of the exposed rack. Use special glue to firmly fix the upper zipper on the fixed installation line of the upper. The lower zipper is embedded in the wire slot of the sole and fixed to ensure that the zipper is firmly installed and will not loosen.

[0105] Through the upper and lower zippers, the upper and the sole are quickly disassembled and assembled, realizing the exchange and matching of the sole and the upper. According to the lining shoe plate of the sole, a knife mold is made to cut the cotton lining fabric. Paste functional materials with air permeability and sweat absorption function on the lining to complete the production of the detachable slippers.

[0106] In another embodiment:

[0107] Design a high-end detachable slipper suitable for sports scenes, set a unified zipper combination starting point and zipper tooth occlusion line, use 3D modeling software to establish a 3D space line model, the sole is made of high-performance rubber material with a thickness of 20 mm, which has good shock absorption and anti-skid performance. The upper is made of breathable mesh fabric with a height of 40 mm, which conforms to the foot shape during human movement. After synthesizing the complete shoe body, 3D printing and evaluation are carried out. According to the feedback, the mesh structure of the upper is optimized to improve the air permeability, and then the final version is determined and the part data is exported.

[0108] According to the 3D model data, the bottom plane shape is determined to be a special shape conforming to the mechanics of sports, the circumference is 250 mm, the last is opened and the shoe plate and the marking plate are made. During the marking plate making process, the starting point of the zipper and the fixed installation line are accurately marked to ensure the accuracy of the zipper installation.

[0109] Cutting out the upper part of the air-permeable mesh shoe material, marking the starting point of the zipper and drawing the installation line, making the rubber sole with a wire slot, the wire slot is specially designed to better fix the zipper and ensure its stability during movement;

[0110] The reverse installation structure with the lower zipper of the sole outward and the upper zipper of the upper outward and the hidden rack, using high-strength glue and professional tools to install the zipper in place, ensures that the zipper will not malfunction during movement;

[0111] Realize the quick disassembly and exchange of the sole and the upper, make a knife mold according to the substrate shoe plate of the sole, cut the special antibacterial and deodorizing substrate fabric, and paste the environmentally friendly antibacterial material on the substrate to complete the production of high-end functional detachable slippers.

[0112] The detachable slipper production process of the present application can flexibly adjust the specific parameters and material selection of each step according to different product positioning and market demand, and produce diversified and high-quality detachable slipper products. At the same time, the production process of the present application is not only suitable for the style in the above embodiment, but also can be widely applied to the production of various styles of detachable slippers, and has strong universality and practicality.

[0113] Although embodiments of the present application have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production process of a detachable slipper, characterized by, The specific steps include: S1, set a unified zipper combination starting point and zipper tooth occlusion line, establish a 3D space line model, design 3D models of the shoe sole and the shoe upper based on the model, synthesize a complete shoe body and export component data; S2, according to the 3D model data, make shoe plates of the shoe upper and the shoe sole, 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, cut out each part of the shoe upper on the shoe material, mark the fixed starting point of the upper zipper, mark the fixed installation line through the marking plate, and make a shoe sole with a line groove corresponding to the fixed installation line of the zipper; S4, fix the upper zipper on the fixed installation line on the shoe upper, and fix the lower zipper in the line groove of the shoe sole. The upper zipper and the lower zipper are installed in a reverse installation structure; S5, quickly disassemble and assemble the shoe upper and the shoe sole through the upper zipper and the lower zipper to realize the exchange and matching of the shoe sole and the shoe upper; Before the S1 step, the zipper tooth occlusion line is optimized, and the specific steps include: Combine the 3D scanner and the 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 parameterized 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 target and the shoe body aesthetic target; The establishment of the dynamic balance includes: Curvature adaptive adjustment: according to the curvature radius of the shoe upper, the occlusion line path is dynamically generated through the Bezier curve to ensure uniform contact of the gear rack meshing surface; Stress distribution optimization: based on ANSYS Workbench, finite element analysis is performed, a zipper closing force of 50N±5% is applied, the occlusion line inclination angle is adjusted through the gradient descent algorithm, and the iteration is terminated when the maximum stress change is less than 0.5MPa / time, so that the maximum stress is reduced to below 30% of the material compressive strength.

2. The production process of the detachable slippers according to claim 1, characterized in that, In the S1, after synthesizing the complete shoe body, the 3D printing technology is used to print and color the entity model of the complete shoe body, the entity model is evaluated, and the final version is optimized and finalized according to the feedback.

3. The production process of the detachable slippers according to claim 1, characterized in that, In the S1, the exported component data includes the materials and sizes of the zipper, the shoe sole and the shoe upper, and the structure mode.

4. The production process of the detachable slippers according to claim 1, characterized in that, In the S2, when making the shoe plates of the shoe upper and the shoe sole, it includes: According to the design style and size, determine the bottom shape and circumference; According to the determined bottom type, design style and size, set up a last; According to the last, make shoe plates of each part of the shoe upper, shoe plates of the shoe sole and marking plates of the lining.

5. The production process of a detachable slipper according to claim 4, wherein, When making the marking plate: According to the zipper combination starting point, calculate and mark 1 set of zipper starting point positions: Mark the accurate point position of the lower zipper socket starting point on the shoe sole plate; Mark the lower zipper plug starting point on the shoe upper plate; According to the zipper tooth occlusion line, mark the zipper fixed installation line on the shoe upper plate and the zipper fixed installation line on the shoe sole plate.

6. The production process of a detachable slipper according to claim 1, wherein, In the S4, the reverse installation structure of the upper zipper and the lower zipper includes: The lower zipper of the shoe sole is outward, the upper zipper of the shoe upper is outward, and the gear rack is exposed; The lower zipper of the shoe sole is outward, the upper zipper of the shoe upper is outward, and the gear rack is hidden.

7. The production process of a detachable slipper according to claim 1, wherein, In the S5, a lining is provided in the shoe sole, and the production of the lining includes: A knife die for cutting the substrate from the insole substrate shoe plate; Cutting the substrate fabric according to the knife die; Applying one of traditional, synthetic, functional, and eco-friendly materials on the top of the substrate.

8. The production process of a detachable slipper according to claim 1, wherein, The zipper mechanical objectives include minimizing the maximum stress of the zipper closure and maximizing the rack engagement efficiency, and the shoe body aesthetic objectives include constructing a score function based on user preference data, and optimizing the coordination of the bite line and the upper contour.

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